JPH0643875Y2 - Cassette transport device for cassette auto changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention will be described in the following order.

A. Industrial field of use B. Outline of the device C. Prior art D. Problems to be solved by the device E. Means for solving the problem F. Action G. Example G _1. Overall configuration of cassette autochanger G _2. Overall configuration of cassette carrier G _3. Configuration of first cassette loading / unloading unit G _4. Configuration of second cassette loading / unloading unit G _5. Configuration of cassette delivery switching unit G _6. Configuration of cassette loading / unloading unit G _7. Operation of the Embodiment H. Effects of the Invention A. Field of Industrial Application This invention involves reciprocating between a cassette storage shelf that stores a plurality of cassettes and a playback device such as a video tape recorder (VTR). The present invention relates to a cassette carrying device of a cassette autochanger which performs continuous video playback for a long time by selectively delivering a plurality of cassettes.

B. Outline of the Invention This invention is, in a cassette carrying device of a cassette autochanger, provided with a cassette loading / unloading means for loading and unloading the cassette while moving the cassette up and down, and a bar attached to the cassette. Since the sensor for reading the code at the time of carrying in / out the cassette is provided, the reading position (spot position) of the bar code of the cassette by the sensor can be changed with a simple structure at a low cost, and printing errors and voids can be prevented. Even if there is a defect such as a defective printing of the bar code due to it or a stain due to adhesion of dust or the like, the bar code can always be read accurately.

C. Prior Art The applicant of the present invention has developed a cassette auto changer (automatic cassette loading device) that enables continuous video playback over a long time in a television broadcasting station, for example, in Shokai 62-16814.
It is disclosed in No. 7. In the cassette carrier of this cassette auto changer, a sensor that reads the barcode displayed on the side of the cassette and inputs the information such as the cassette number and title read from the barcode to the CPU (microcomputer) is It is self-propelled.

Then, when the cassette is loaded from the cassette storage shelf into the cassette transport device, the bar code is read by the sensor that is stationary at a fixed position, and when the reading is uncertain, it is loaded into the cassette transport device and stopped. The sensor can be self-propelled by the belt (reciprocating the sensor by the belt) with respect to the cassette, and the barcode can be read again.

D. Problem to be Solved by the Invention However, in the above-mentioned conventional technology, the sensor scans the same position of the barcode at the time of loading the cassette and at the time of self-propelling of the sensor, so that the scanning position of the sensor is set at the same position. If there is a defect such as a print defect or stain on the barcode, the barcode cannot be accurately read.

Further, since a dedicated actuator such as a belt for self-propelling the sensor is indispensable, not only the structure is complicated and expensive, but also the number of parts is increased and the installation space is required. It had the drawback of becoming heavy.

Therefore, the present invention makes it possible to easily change the bar code reading position of the cassette by the sensor and significantly improve the bar code reading efficiency of the sensor even if the bar code is defective. A carrier device is provided.

E. Means for Solving the Problem In a cassette carrying device that reciprocates between a plurality of cassette storage shelves of a cassette auto changer and a playback device to selectively deliver a plurality of cassettes, the cassette storage shelves of the device body are A cassette inlet / outlet is provided at a position opposed to each other, and cassette loading / unloading means for loading / unloading the cassette from the cassette inlet / outlet while vertically moving the cassette is arranged in the device main body, and is attached to the cassette. A sensor is provided for reading the barcode when the cassette is carried in and out.

F. Action The cassette loading / unloading means moves the cassette up and down while loading / unloading the cassette into / from the main body of the cassette carrying device, so that the bar code of the cassette is read. Change. As a result, even if there is a defect in the barcode, the reading position can be changed and the reading can be performed easily and accurately, and the reading efficiency of the barcode by the sensor is significantly improved.

G. Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

G _1. Configuration of the whole cassette autochanger In FIGS. 10 and 11, reference numeral 1 is a cassette autochanger, which has cassette storage shelves 3 and 3 which store a large number of cassettes 2 vertically and horizontally at a predetermined distance in the front and rear. ,
A plurality of cassette type VTRs (reproducing apparatus) 4, ... Are vertically provided so as to straddle the left end side of the pair of cassette storage shelves 3 in the figure. Between the pair of cassette storage shelves 3, 3 and the VTR 4, there is provided a cassette transfer device 10 for reciprocating between the cassette storage shelves 3 and the VTR 4 by the moving mechanism 6 to selectively transfer the cassette 2. It is prepared.

G _2. Configuration of entire cassette carrying device As shown in FIG. 1, at a position facing the cassette storage shelf 3 of the substantially box-shaped device body 11 of the cassette carrying device 10 and the cassette insertion port 5 of the VTR 4, A pair of first cassette inlet / outlet 12, 12 and second cassette inlet / outlet 13 are provided, respectively. First and second cassette loading / unloading means 14, 15 for loading / unloading the cassette 2 into / from the apparatus main body 11 from the first and second cassette entrances / outlets 12, 13 are arranged in the apparatus main body 11, respectively. There is. The first and second cassette loading / unloading means 14 and 15 can be driven by a single motor (driving source) 61 via a transmission means 60 described later.

In addition, the first and second cassette loading / unloading means 14 and 15 are the cassettes 2 loaded / unloaded into / from the apparatus main body 11 by the first cassette loading / unloading means 14 or the second cassette loading / unloading means 15. The cassette transfer switching means 85, which will be described later, for transferring to the second cassette carry-in / out means 15 or the first cassette carry-in / out means 14 is linked. As a result, the cassette 2 carried in and out of the apparatus main body 11 by the first cassette carrying-in / carrying-out means 14 or the second cassette carrying-in / carrying-out means 15
Can be delivered to the second cassette carry-in / out means 15 or the first cassette carry-in / out means 14 so that the cassette 2 can be delivered between the cassette storage shelves 3 and the VTR 4.

Further, at a position near the pair of first cassette entrances / outlets 12, 12 in the apparatus main body 11, a pair of sensors 8, 8 for reading the bar code 7 attached to the cassette 2 at the time of carrying in / out the cassette 2 is mounted on the bracket. It is attached so as to incline slightly upward through 9 and 9. In addition, in the device body 11,
By pressing the cassette 2, the cassette storage shelf 3,
There is provided a cassette loading / unloading means 90 for taking out the cassette 2 from each cassette storage shelf 3 by storing the cassette 2 in 3 and pressing a cassette pressing means (not shown) provided in each cassette storage shelf 3. The device body 11
Inside, the second cassette loading / unloading means 15, the first cassette loading / unloading means 14, each sensor 8, and the cassette loading / unloading means 90 are sequentially arranged from the second cassette loading / unloading opening 13.

G _{3. Configuration of} first cassette loading / unloading means The first cassette loading / unloading means 14 is a pair of vertical members which are fixed between the lower portions of the respective first cassette loading / unloading openings 12, 12 of the apparatus body 11. A pair of fixing pieces 16 and 16 are provided in front of and behind, respectively. Each of the first cassette unloading means 14 includes a drive shaft 17 rotatably supported in the center between the pair of vertical fixing pieces 16 and the upper part of the pair of vertical fixing pieces 16, and drive rollers 18 fixed to both ends of the drive shaft 17. 18, a driven shaft 19 rotatably supported at both ends between the pair of vertical fixing pieces 16 and 16 and the driven shaft.
Driven rollers 20 and 20 fixed to both ends of 19, a pair of conveyor belts 21 and 21 wound between the pair of drive rollers 18 and 18 and driven rollers 20 and 20, and the driven shafts 19 and 19
Is rotatably supported at both ends of a support shaft 25 which is constantly urged downward through a pair of extension coil springs 23, 23 and a pair of arms 24, 24 with respect to each bracket 22 fixed to the apparatus main body 11 above. And a pair of rollers 26, 26 that have been formed.

Outside of the vertical fixing piece 16 between each driving roller 18 and the driven roller 20 (the second cassette loading / unloading means 15 side and the sensor 8 side)
A plurality of auxiliary rollers 27 are rotatably supported in each. In addition, an intermediate roller is provided between each adjacent drive roller 18.
28 is rotatably supported.

As shown in FIG. 7, each driven roller 20 of the pair of driven rollers 20, 20 on the side of the pair of sensors 8, 8 has an eccentric roller (this eccentric roller is designated by reference numeral 20 in FIGS. 1, 7, 8 only). ′). This eccentric amount is X, and the shortest radius of the eccentric roller is
R _1, the maximum radius R _2, the radius of the driven roller 20 other than the eccentric roller When _{R, R 1 = R, R} 2> R, X = R 2 - (R 1/2 + R 2/2)
The above-mentioned eccentric roller is formed in the shape of As a result, the pair of sensors 8 and the eccentric driven rollers 20 on the side of 8
Thus, when the cassette 2 on the first cassette inlet / outlet 12, 12 side is carried in / out, the sensor 8 side of the cassette 2 vibrates in the vertical direction twice the eccentric amount X.

The drive shafts 17, 17 are arranged in parallel with each other, and a drive gear 29 is screwed to the inside of one vertical fixing piece 16 on the second cassette entrance / exit 13 side (opposite side of the other vertical fixing piece 16). It is fixed by etc. Further, the motor 61 is fixed to the other vertical fixing piece 16, and a pinion 61b fixed to the rotating shaft 61a thereof is provided so as to project inside the other vertical fixing piece 16. The drive gears 29, 29 and the pinion 61b are connected by a reduction gear train 30.

The reduction gear train 30 is fixed to a first intermediate shaft 31 rotatably supported between the pair of vertical fixing pieces 16 and 16 and a first intermediate gear 32 that meshes with the pinion 61b, and the pair of vertical gears. The second intermediate shaft 33 rotatably supported between the fixed pieces 16, 16.
A pair of second intermediate gears 34, 34 fixed to each other and having a large-diameter gear portion 34a and a small-diameter gear portion 34b, and one large-diameter gear portion 34a meshed with the first intermediate gear 32; Vertical fixing piece 1
6 is rotatably supported inside, and has a large diameter gear portion 35a and a small diameter gear portion 35b, and the large diameter gear portion 35a is meshed with the small diameter gear portion 33b of the other second intermediate gear 33 and A third intermediate gear 35 in which a small-diameter gear portion 35b is meshed with each of the drive gears 29, 29 via a pair of fourth intermediate gears 36, 36, and is fixed to one end side of the second intermediate shaft 33. Vertical fixing piece
16 and a bevel gear 37 protruding outward. still,
The gears 32, 34, 35, 36 and the like are made of synthetic resin to reduce their weight.

G _{4. Configuration of} second cassette loading / unloading means The second cassette loading / unloading means 15 includes a pair of substantially U-shaped brackets 38 fixed to the front, rear, and both ends outside the one vertical fixing piece 16. 38, a pair of rotating pieces 40, 40 rotatably supported on the upper part of each bracket 38 via a support shaft 39, and facing each other with a predetermined interval, and the pair of rotating pieces 4
A drive roller 42 fixed to one end of a drive shaft 41 rotatably supported between 0 and 40 and protruding to one rotating piece 40 (on the side of the first cassette inlet / outlet 12) and the pair of rotating pieces 40. A driven roller 43 fixed to one end of a driven shaft 43 rotatably supported between the drive roller 42 and the driven roller 44, and a conveyor belt 45 stretched between the drive roller 42 and the driven roller 44. The pair of vertical fixing pieces 16 and 16 are rotatably supported by respective sliders 47 which are vertically slidable with respect to a pair of U-shaped vertical plates 46 and 46 which are vertically fixed to both front and rear ends. A pair of rollers 48, 48 and a support shaft that is constantly urged downward via tension coil springs 50 and arms 51 with respect to each bracket 49 fixed to the apparatus main body 11 above the pair of conveyor belts 45, 45. The roller 53 is rotatably supported at one end of the roller 52, and is substantially configured.

A long synchro shaft 54 is rotatably supported between the pair of U-shaped brackets 38, 38. A bevel gear 55 meshing with the bevel gear 37 is fixed to the approximate center of the synchro shaft 54, and gears 56 and 56 are fixed in the brackets 38 at both ends. This each gear 56
Is engaged with a gear 57 fixed to the support shaft 39, and is also a drive gear fixed to the drive shaft 41 via an intermediate gear 58.
It meshes with 59. These synchro shaft 54, bevel gear 5
5, the gears 57 to 59, the motor 61 and the reduction gear train 30 constitute the transmission means 60.

G _5. Configuration of cassette delivery switching means Below the pair of rotating pieces 40, 40 located on both sides of the second cassette inlet / outlet 13 of the apparatus main body 11, a U-shape is provided via a support shaft 62. The plate 63 is rotatably supported. A rack 64 made of synthetic resin is attached to each plate 63 via a bar 63a. Above and below each of these racks 64,
Vertically long holes 64a, 64a are formed, and the pair of upper and lower holes 64a
The racks 64 are fixed to the plate 11a by inserting pins 65, 65 protruding into the plate 11a fixed vertically below the second cassette inlet / outlet 13 of the apparatus main body 11 into the a and 64a and fixing them with washers. In contrast, it is attached so that it can slide vertically.

The pair of sliders 47, 47 arranged on the side of the pair of cassette inlets / outlets 12, 12 of the apparatus main body 11 are made of synthetic resin, and each pair of vertically elongated holes 47a are provided above and below the slider 47, 47.
47a are formed respectively, and in the upper and lower holes 47a, 47a,
Pins 66 and 66 protruding from the vertical plates 46 and 46, respectively.
The sliders and then secure them with washers.
47, 47 are attached to the vertical plates 46, 46 slidably in the vertical direction. Further, the lower part of each slide 47 is formed on the rack 47b.

A pair of gear shafts 67, 67 are rotatably supported below the pair of first cassette inlets / outlets 12, 12 between the plate 11a of the apparatus main body 11 and the vertical frame portion 11b on the cassette inlet / outlet means 90 side. I am doing it. In this pair of gear shafts 67, 67,
From the vertical frame 11b to the plate 11a, bevel gears
A gear 68, a gear 69, a gear 70 that meshes with the rack 47b of each slider 47, and a gear 71 that meshes with each rack 64 are sequentially fixed. The gears 69 to 71 are made of synthetic resin to reduce their weight.

In addition, a pair of L fixed to the inner surface side of the vertical frame portion 11b.
A long synchro shaft 73 is rotatably supported between the character-shaped brackets 72. This synchro shaft
Bevel gears 74, 74 meshing with the pair of bevel gears 68, 68 are fixed to both ends of 73. In addition, one gear shaft 6
A gear 75 is fixed to the outer end portion of the vertical frame portion 11b of 7, while a worm gear 77 is provided on the outer surface side of the vertical frame portion 11b.
The motor 76 having the above is fixed via a bracket 78 having a U-shape. The worm gear 77 of the motor 76 and the gear 75 at the end of the one gear shaft 67 are connected by a reduction gear train 80.

This reduction gear train 80 is rotatably supported by the vertical frame portion 11b, is pinion 81 meshed with the gear 75, and is rotatably supported by the vertical frame portion 11b, and is provided with a small diameter gear portion 82a and a large diameter gear portion. An intermediate gear 82 having a small-diameter gear portion 82a meshed with the pinion 81 and a vertical frame portion 11b rotatably supported, and having a large-diameter gear portion 83a and a small-diameter gear portion 83b. The intermediate gear 830 in which the small diameter gear portion 83b is meshed with the large diameter gear portion 82a of the intermediate gear 82, the vertical frame portion 11b and the bracket 782.
It is rotatably supported between and has a pair of gear parts 84a, 84 at both ends.
and a gear 84 having one gear portion 84a meshed with the large-diameter gear portion 83a of the intermediate gear 83 and the other gear portion 84b meshed with the worm gear 77 of the motor 76.
These reduction gear train 80, motor 75, shafts 67 and 73, gear 6
The cassette delivery switching means 85 is composed of 9 to 71 and 75, the rack 64, the slider 47 and the like. Incidentally, the gear 75.8
2.83 etc. are made of synthetic resin to reduce weight.

G _6. Configuration of cassette loading / unloading means A pair of first cassette loading / unloading means 14, 1 of the apparatus main body 11
Between the 4 and the synchro shaft 73 is the cassette loading / unloading means 90.
Is provided. The cassette loading / unloading means 90 is synchronized with the rotation of the pair of conveyor belts 45, 45 of the second cassette loading / unloading means 15 and the vertical movement of the pair of sliders 47, 47 having the pair of rollers 48, 48, respectively. A front-rear direction along a transfer body 91 consisting of vertically moving front and rear pieces 91a, 91a and left and right side pieces 91b, 91c, and a pair of shafts 92, 92 laid between the front and rear pieces 91a, 91a of the transfer body 91. It is attached to the upper surface of a slider 93 that reciprocates (in the direction of the pair of first cassette inlets / outlets 12, 12),
By pressing the cassette 2, the cassette 2 is stored in the cassette storage shelves 3, 3 and by pressing a cassette pressing means (not shown) provided in each cassette storage shelf 3, each cassette storage shelf 3 A pair of levers 94, 94 for taking out the cassette 2 from the above is generally configured.

More specifically, the transfer body 91 includes the vertical frame portion 11 of the apparatus main body 11.
A rack 98, which is vertically movable along a support shaft 97 erected via brackets 95 and 96 attached to the upper and lower parts of b, and is fixed to the recesses of the front and rear pieces 91a and 91a, respectively. , 98 fixed to the pair of gear shafts 67,67
It meshes with 69,69. The rotation of each gear 69 causes the transfer body 91 to move up and down via each rack 98.

Further, a pair of driven pulleys 99, 99, a pair of intermediate pulleys 100, 100, and a drive pulley 101 are rotatably supported on the front and rear, between the left and right side pieces 91b, 91c of the transfer body 91, in the center, and in the lower part of the center. A belt 102 is stretched between the pulleys 99 to 101 in a substantially T-shape. The slider 93 is fixed in the middle of the belt 102. Further, a drive gear 103 is fixed to the drive pulley 101. This drive gear 103 is a pinion of a motor 104 attached to the left side piece 91b of the transfer body 91.
105 is rotatable via a reduction gear train 106. By driving the motor 104, the slider 93 reciprocates back and forth, whereby the pair of levers 94, 94 moves. The right side piece 91 of the transfer body 91
A central portion of c projects upward, and a large-diameter roller 108 and a plurality of small-diameter rollers 109 that press the upper surface of the cassette 2 are rotatably attached to a bar 107 that extends vertically from the right side piece 91c from the protruding portion. There is.

G _7. Operation of Embodiment According to the cassette carrying device 10 of the cassette autochanger 1 of the above embodiments, when the cassette 2 stored in each cassette storage shelf 3 is taken into the cassette carrying device 10, the cassette carrying device is operated. When 10 is moved to a predetermined cassette storage shelf 3 by the moving mechanism 6 and the motor 104 is driven, the pair of levers 94, 94 of the cassette loading / unloading means 90 moves in the front-back direction of the first cassette loading / unloading port 12, 12. When one lever 94 presses a cassette pressing means (not shown) provided on the cassette storage shelf 3, the cassette 2 enters the first cassette inlet / outlet 12 from the cassette storage shelf 3 and the first cassette carry-in / out is performed. A pair of conveyor belts 21,2 of the means 14
Listed on 1.

Next, the pair of levers 94, 94 are returned to their original positions. For example, when the cassette 2 is placed on the pair of conveyor belts 21, 21 of the first cassette loading / unloading means 14 from the front, the motor 61 is driven. Each pair of conveyor belts through the reduction gear train 30 etc.
The cassette 2 is taken into the apparatus main body 11 of the cassette carrying apparatus 10 and carried in by turning 21, 21 in the direction of the arrow shown in FIG.

At the time of this loading, the sensor 8 reads the information written on the label of the barcode 7 attached to the cassette 2.
Since one driven roller 20 near the sensor 8 is an eccentric roller, the cassette 2 vibrates vertically on the eccentric roller. Due to this vibration, the locus of the reading position (spot position) of the bar code 7 of the sensor 8 becomes as shown by the curve in FIG. 9, and it can be changed without any information reading error. However, if there is a reading error due to the defect of the barcode 7 on the locus of the reading (spot) position of the sensor 8, the cassette 2 is once returned to the position before carrying in, and the barcode is read again at the time of reading. If the cassette 7 is read, when the cassette 2 approaches the eccentric roller 20 'of the first cassette loading / unloading means 14, there is no possibility that the cassette 2 will move in the same vertical movement as the previous time. The spot trajectory will follow a different trajectory from the last time. Therefore,
The reading error of the barcode 7 can be completely avoided, and the barcode 7 can always be read accurately.

Further, when the pair of conveyor belts 21, 21 are rotating, the pair of conveyor belts 45, 45 of the second cassette loading / unloading means 15 is also driven by the transmission means 60 by the single motor 61 in the direction of the arrow in FIG. However, since the conveyor belts 45 attached to the rotating pieces 40 are moving downward around the support shafts 39, the cassette 2 and the conveyor belts 45 do not come into contact with each other, and As shown by the solid line in FIGS. 3 and 3, the cassette 2 is horizontally moved only in one of the front and rear directions of the first cassette inlet / outlet 12, 12.

Next, when the cassette 2 is transferred between the VTR 4 and the cassette carrier 10, the moving mechanism 6 moves the cassette carrier 10 to the VTR 4 at a predetermined position, and the cassette carrier 10 is inserted into the cassette insertion port 5 of the VTR 4. Second cassette doorway 13
Close to each other.

When the motor 76 is driven to rotate the pair of gear shafts 67, 67 in the direction of the arrow in FIG. 5 via the reduction gear train 80, the gears 69 to 71 fixed to the gear shafts 67 are secured.
The racks 98, 47b, 64 meshing with the
Transporting member 91, a pair of rollers 48, 48 of a pair of sliders 47,
A pair of conveyor belts 45, 45 of the second cassette loading / unloading means 15
Rises synchronously. As a result, the pair of conveyor belts 45, 45 moves upward about the support shafts 39 and becomes horizontal, and the cassette is formed by the pair of conveyor belts 45, 45 in the horizontal state and the pair of rollers 48, 48. 2 is lifted as shown by the alternate long and short dash line in FIG.

From this state, the motor 61 is driven and the pair of conveyor belts
By turning 45, 45 in the direction of the arrow in FIG. 5, the cassette 2 can be taken into the VTR 4 from the cassette carrying device 10. At this time, since the pair of conveyor belts 45, 45 and the pair of rollers 48, 48 are moved above the pair of conveyor belts 21, 21 of the first cassette loading / unloading means 14, 14, the cassette 2 is Not contact with the pair of conveyor belts 21, 21,
As shown by the alternate long and short dash line in FIG. 2, the cassette 2 can be horizontally transferred only in one lateral direction of the second cassette inlet / outlet 13 to transfer the cassette 2.

And after the playback of cassette 2 is completed on the VTR4,
When carrying the cassette 2 from the VTR 4 into the cassette carrying device 10, the pair of carrying belts 45, 45 and the pair of sliders 4 are used.
The cassette 2 is loaded to the pair of transport belts 21, 21 of the first cassette loading / unloading means 14, 14 of the cassette transport device 10 with the pair of rollers 48, 48 of 7, 47 raised. From this state, the pair of conveyor belts 45, 45 and the pair of rollers 47, 47 are lowered, and the cassette 2 is carried out to the cassette storage shelf 3 by the pair of conveyor belts 21, 21. When the cassette 2 is completely separated from the pair of conveyor belts 21, 21, the transfer body 91 of the cassette loading / unloading means 90 is moved upward,
By moving the pair of levers 94, 94 toward the first cassette inlet / outlet 12, 12 and pressing the cassette 2, the cassette 2 can be completely stored in the cassette storage rack 3.

In this manner, the first cassette loading / unloading means 14 arranged in the apparatus body 11 of the cassette transporting device 10 allows the cassette 2 to be loaded / unloaded while vertically vibrating, so that the barcode 8 of the cassette 2 by the sensor 8 is used. The reading position can be changed to eliminate the reading error.
Further, since the sensor 8 is fixed to the apparatus main body 11 via the bracket 9 and does not have to be self-propelled by a dedicated actuator as in the prior art, the structure is simplified accordingly, and the space saving of the cassette carrying apparatus 10 can be achieved. The weight can be reduced, and the manufacturing cost can be reduced.

Although the cassette autochanger using the video cassette has been described in the above embodiment, the present invention is not limited to this, and it goes without saying that it may be used for an autochanger of various cassettes that store various recording media such as optical disks. is there.

H. Effect of the Invention As described above, according to the present invention, a cassette loading / unloading means for loading / unloading the cassette while moving the cassette up and down is provided in the main body of the cassette transporting device, and the barcode attached to the cassette is attached. Since the sensor for reading in and out of the cassette is provided, the reading position of the barcode of the cassette by the sensor can be changed with a simple structure at low cost, and the barcode can be read even if there is a defect in the barcode. It can always be read accurately. Further, since it is only necessary to move the cassette up and down by the cassette loading / unloading means arranged in the main body of the cassette carrying device, a dedicated actuator for self-propelling the sensor as in the conventional case is not required. It is possible to save space and reduce the weight, and it is possible to reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette carrying device showing an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, FIG. 4 is a plan view thereof, and FIG. 6 is an explanatory view of an ordinary roller used in the first cassette loading / unloading means, FIG. 7 is an explanatory view of the eccentric roller, and FIG. 8 is a perspective view showing a state of reading a barcode of a cassette. 9 and 9 are explanatory views showing the locus of spots of the same sensor, FIG. 10 is a front view showing the overall outline of the cassette automatic change, and FIG. 11 is a plan view of the same. 1 ... Cassette auto changer, 2 ... Cassette, 3
…… Cassette storage shelves, 4 …… VTR (playback device), 7 ……
Bar code, 8 ... Sensor, 10 ... Cassette transporter,
11 …… Main unit, 12 …… Cassette entrance / exit, 14 …… Cassette loading / unloading means.

Claims (1)

[Scope of utility model registration request] 1. A cassette carrying device for reciprocating between a plurality of cassette storage shelves of an automatic cassette changer and a reproducing device to selectively deliver a plurality of cassettes, at a position opposed to the cassette storage shelves of an apparatus main body. A cassette loading / unloading means is provided in the apparatus main body for loading / unloading the cassette while vertically moving the cassette in the apparatus main body from the cassette loading / unloading port, and a barcode attached to the cassette is attached to the cassette loading / unloading means. A cassette carrying device for a cassette auto changer, which is provided with a sensor for reading when a cassette is carried in and out.