JP3412895B2 - Elevating position detecting device for elevating device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is preferably applied to a so-called automatic changer device for selectively taking out compact discs stacked in a magazine and loading them at a predetermined reproducing position on a turntable. The present invention relates to a lifting position detecting device for a lifting device.

[0002]

2. Description of the Related Art In a compact disc reproducing apparatus,
In order to reduce complicated disk replacement work, a configuration including an autochanger device has been widely used, especially in a vehicle-mounted device. This autochanger device takes out the compact discs placed on a tray and stored in a stacked state in a magazine onto a pedestal, then lifts and lowers the gantry by an elevating means, and a predetermined turntable is arranged. The disc is loaded at the reproducing position, the disc is reproduced, and the disc that has been reproduced is removed from the reproducing position by the vertically moving displacement of the gantry by the elevating means, and then pushed into a predetermined storing position in the magazine to be stored. .

In order to realize the above-mentioned disc exchange operation, in a typical conventional technique, an elevating position detecting device 1 as shown in FIGS. 5 and 6 is provided adjacent to the mount. The elevation position detecting device 1 includes an index member 3 having a through hole 2 and a pair of light emitting / receiving elements 4 facing each other.
Are arranged in a plurality (4 in this embodiment) and the moving member 5 is provided. The index member 3 extends in the up-and-down direction 12 of the gantry 7 which is moved up and down by the up-and-down unit 6, and is fixed to the deck body 8. The moving member 5 is fixed to the pedestal 7, and moves on the index member 3 in the ascending / descending direction 12
Is displaced to. The light emitting / receiving element 4 has the through hole 2 of the index member 3.
Are arranged opposite to each other.

The through-hole 2 has a portion where the through-hole is formed as "1" and a portion where the through-hole is not formed as "0", and a 4-bit data 11 such as a binary number is used as an index. The data 11 is shown in the width direction of the member 3, and the data 11 are provided at equal intervals in the longitudinal direction of the index member 3 so as to correspond to the respective disk storage positions 10 of the magazine 9.

On the other hand, each light emitting / receiving element 4 of the moving member 5 corresponds to the arrangement pitch of the through holes 2 so that the 4-bit data 11 can be read by transmitting / blocking the light depending on the presence or absence of the through holes 2. The moving member 5 is displaced in the ascending / descending direction in conjunction with the gantry 7 to read each data 11 and detect the storage position of the desired disc in the magazine 9. , Can be taken out.

[0006]

In the ascending / descending position detecting device 1 configured as described above, when the gantry 7 is shaken by vibration or the like, it is detected that the moving member 5 is tilted with respect to the through hole 2. There are things you have to do. As shown in the enlarged view of FIG. 6, the through hole 2 has a rectangular shape, and in order to accurately position the gantry 7, it is preferable that the thickness W be short and the length L be long.
Is not regulated. In such a through hole 2, when the moving member 5 is tilted and any one of the light receiving and emitting elements 4 deviates from the normal position by the thickness W or more, the through hole 2 is accurately formed.
Can no longer be detected. Therefore, there is a problem of poor vibration resistance.

Further, since the 4-bit data is expressed in the width direction of the index member 3, there is a problem that the width of the index member 3 becomes wide and the mounting position is restricted.

It is an object of the present invention to provide an ascending / descending position detecting device for an ascending / descending device which prevents erroneous detection of an index such as a through hole and can freely select a mounting position.

[0009]

According to the present invention, there is provided an elevation position detecting device for an elevation device capable of stopping at a plurality of stop positions, the extension position detection device being formed so as to extend in a direction intersecting with the elevation direction of the elevation device. Index members provided with indexes at intervals corresponding to the respective stop positions of the lifting device, a plurality of reading means arranged at the same intervals as the indexes along the intersecting direction, for reading the presence or absence of the index, and the lifting device Driving means for displacing the reading means in the intersecting direction on the index member in conjunction with lifting / lowering displacement, and lifting / lowering displacement of the lifting / lowering device to a desired stop position in response to reading results of the reading means. And a control unit for controlling the index, wherein at least one reading unit of the plurality of reading units outputs that the index is present as a reading result at each stop position of the lifting device. A vertical position detection device of the lifting device, characterized in that it is formed.

Further, according to the present invention, there is provided a gantry which is provided adjacent to a storage member which stores a plurality of members in a stacked state and which discharges the member from the storage member and inserts the member into the storage member in a stacking direction of the members. In the elevating position detecting device of the elevating device that displaces up and down so as to be stoppable at a position corresponding to the storage position of each member in the storage member, it is formed so as to extend in a direction intersecting the vertical direction of the gantry, An index member with an index attached at intervals corresponding to each stop position of the frame,
A plurality of reading units are arranged along the intersecting direction at the same intervals as the index and read the presence or absence of the index, and the reading unit is interlocked with the elevating displacement of the elevating device so that the reading unit moves on the index member in the intersecting direction. The driving means for displacing to, and in response to the reading result of each of the reading means, a control means for vertically moving the lifting device to a desired stop position, the index, at each stop position of the lifting device, At least one reading unit of the plurality of reading units is formed so as to output that the index is present as a reading result.

In the present invention, the index is a binary code, and when the code is represented by a binary value of "0" and "1", the code attached to the index member is a stop that should be stopped. When the position is 7 or less, it is represented by "001011100", and when the position is 15 or less, "000100110101".
111000 ”, and when it is 31 or less,“ 0
0001000111011001101001010
111110000 ".

According to the present invention, the index is a binary code, and the reading means are a pair of light emitting and receiving elements which are arranged to face each other via the index member or face the index member. The code is represented by whether or not a through hole is formed in the index member or whether or not a light reflection process is performed.

[0013]

[0014]

[0015]

[0016]

According to the present invention, a plurality of members such as compact disks are stored in a stacked state in a storage member such as a magazine, and a desired member is discharged from the storage member and placed on a gantry. Further, the member is inserted into the storage member from the mount. The index member is formed so as to extend in a direction intersecting the vertical direction of the gantry, and indexes are attached to the index member at intervals corresponding to respective stop positions of the lifting device. A plurality of reading means are displaced in the intersecting direction on the index member in association with the vertical displacement of the gantry. The plurality of reading units are arranged at the same intervals as the index along the intersecting direction and read the presence or absence of the index. In response to the reading result of the reading means, the control means moves the pedestal up and down to a desired stop position.

Therefore, by forming the indexes in the direction intersecting the vertical direction of the lifting device, the interval between the indexes can be widened and erroneous detection due to vibration can be prevented.

Preferably, the index is a binary code, and the reading means are a pair of light emitting / receiving elements which are arranged to face each other via the index member or face the index member. The code is represented by whether or not a through hole is formed in the index member when the light emitting and receiving elements are arranged to face each other through the index member, and a light reflection treatment is performed when the element faces the index member. It is represented by whether or not is applied.

Further preferably, when the code is represented by a binary value of "0" and "1", the code attached to the index member is "0" when the stop position of the lifting device is 7 or less.
01011100 ”, in this case, 1 in 3 units
The data can be read by shifting them one by one, and up to seven positions can be detected. When the number of stop positions is 15 or less, it is represented by "000100110101111000" and is read in units of four, and a maximum of 15 positions can be detected. When the number of stop positions is 31 or less, "00001000011101100110100"
It is represented by “1010111110000”, and a maximum of 31 positions can be detected by reading in units of 5.

In this way, even if the indexes are arranged on a straight line in the direction crossing the lifting direction of the lifting device and are shifted and read one by one, the same code does not exist and the position can be detected. Therefore, the width of the index member can be reduced, and the mounting position of the index member is not limited.

[0021]

1 is a perspective view of a compact disc player 23 in which an ascending / descending position detecting device 21 according to an embodiment of the present invention is used. This compact disc player 23
The compact disk 26, which is a member placed on the tray 24 and stored in a stacked state in the magazine 25, which is a storage member, is selectively taken out by the inserting / ejecting means 28 on the pedestal 27 to be reproduced. This reduces operator's troublesome disk exchange operation.

An output from an arm motor (not shown) is transmitted to the rocking member 34 via the worm and the reduction gear 33, and the rocking member 34 rocks and displaces. A hook (not shown) attached to the section is guided by a guide groove 36 formed in the pedestal 27 to be displaced, so that the disk 26 placed on the tray 24 in the magazine 25 is pulled out, and the pedestal 2
Hold at 7. In addition, the disc 26 that has been reproduced is placed on the tray 24 and pushed into the magazine 25 to be stored in a predetermined storage position.

The gantry 27 is supported by a pair of elevating devices 51 provided on both sides of the gantry 27 so as to be movable up and down in the direction of arrow 52. The lifting device 51 includes the lever members 53, 54 and one end portion 53 a of the lever member 53.
A drive mechanism 57 such as a rack and a pinion gear and a motor (not shown) for displacing the disk along a guide groove 56 formed on the base 55, and whether or not the pedestal 27 faces a desired disk storage position. It is configured to include an elevating position detection device 21 for making a determination.

One end 53a of the lever member 53 can be slidably displaced on the guide groove 56 by a pin 61, and its central portion 53b is erected on a rising piece 62 extending from the base 55. The pin 27 is swingably supported by the pin 63, and the other end portion 53c also swingably supports the mount 27 by the pin 64.

The lever member 54 has one end 54a.
Is swingably attached to the pedestal 27 by a pin 65, the central portion 54b is swingably connected to the lever member 53 by a pin 66, and the other end portion 54c is a pin 67. The rising piece 62 is slidably and swingably supported. Therefore, the one end portion 53 a of the lever member 53 is displaced on the guide groove 56 by the drive mechanism 57, so that the gantry 27 is moved to the arrow 5.
It is displaced up and down in two directions.

The base 55 is also provided with a magazine holder 71 to which the magazine 25 is attached. An index member 72 that constitutes the ascending / descending position detection device 21 is provided on the magazine holder 71 so as to extend in the insertion / ejection direction 73 of the disc 26 with one end fixed to the magazine holder 71. As shown in the enlarged view of FIG. 2, the elevation position detecting device 21 includes the index member 72, and a moving member 74 that is displaced in the insertion / ejection direction 73 on the index member 72 in association with the elevation displacement of the gantry 27. A pair of light emitting / receiving elements 7 provided on the moving member 74 and opposed to each other via the index member 72.
5b and 75a (collectively referred to as 75).

As shown in the enlarged view of FIG. 3, the moving member 74 has a substantially U-shaped cross section perpendicular to the axis, and a bottom portion 76.
And a pair of side portions 77 rising from both ends of the bottom portion 76 and facing each other. One of the side portions 77 has a light emitting element 75a realized by a light emitting diode or the like, and the other side portion 77 has a light emitting element 75a realized by a photodiode or the like and receives light emitted from the light emitting element 75a. The plurality of (four in this embodiment) sets of light receiving elements 75b are provided at equal intervals W from each other. The outputs from the light receiving elements 75b are input to a processing circuit (not shown) realized by a microcomputer or the like via the lines 78a to 78d.
In addition, a guide projection 79 that projects outward is provided on the side portion 77 that faces the outside of the moving member 74.

On the other hand, a substantially V-shaped interlocking member 82 is rotatably attached to the magazine holder 71 and the gantry 27 by pins 80 and 81. The interlocking member 82 has a first interlocking piece 83 and a second interlocking piece 84 that is bent and continuous from the first interlocking piece 83, and the bent portion is the pin 80.
Is attached to the magazine holder 71, and the free end of the first interlocking piece 83 is attached to the mount 27 by the pin 81. Further, the second interlocking piece 84 is provided with a guide elongated hole 85 in the longitudinal direction, and the moving member 74 is provided in the guide elongated hole 85.
The guide protrusion 79 of FIG.
By moving within the range of the position indicated by, the guide protrusion 79 is guided in the guide elongated hole 85, and the moving member 74 moves in the inserting / removing direction 73.

Referring to FIG. 4, the index member 72 is provided with an index 90 read by the light emitting / receiving element 75.
Are provided at equal intervals over the longitudinal direction of. This index 9
0 is represented by whether or not the through hole 87 is formed, and the mutual intervals between the respective indexes 90 are the same as between the light receiving and emitting elements 75 so as to face the light receiving and emitting elements 75 of the moving member 74. Are provided with a space W between them.

In such an index 90, if the portion 88 with the through hole 87 is "1" and the portion 89 without it is "0", "0001001101011" in the case of FIG.
11000 ”, a binary 4-bit number is sequentially shifted in units of four, yielding“ 0001,001 ”.
0,0100,1001,0011,0110,110
1,1010,0101,1011,0111,111
1, 1110, 1100, 1000 ”can be obtained in 15 different codes. This code is stored at the storage position of the disk 26, for example, 0001 = 1st sheet, 0
010 = second sheet ...

Therefore, the moving member 74 moves the index 90 one by one on the index member 72, and the index 9 is generated by the four facing light emitting / receiving elements 75 in the moving member 74.
By reading 0, the storage positions of up to 15 disks 26 are detected. The reading of the index 90 by the light emitting / receiving element 75 is performed depending on whether the light receiving element 75b receives the light generated from the light emitting element 75a, that is, whether the through hole 87 is formed.

In order to position the moving member 74,
Of the four indices 90 read by the light emitting / receiving element 75, one code is always "1", that is, one is always the portion 88 having the through hole 87, and 15 different codes are displayed. ing. Therefore, a binary 4-bit number is "0".
Since “000” is excluded, 2 ⁴ −1 = 15, and 15 types of codes are obtained as described above.

Further, the through hole 87 is formed in a rectangular shape, and is arranged with the side intersecting the moving insertion / ejection direction 73 of the moving member 74 as the longitudinal direction. Therefore, the moving member 7
No. 4 prevents the light emitting / receiving element 75 from erroneously reading the index 90 unless it is inclined with respect to the index member 72 by at least the length L1 of the through hole 87 in the longitudinal direction. Therefore, it is strong against vibration and the like, and is particularly effective for in-vehicle use.

The operation of the autochanger device 22 having the ascending / descending position detecting device 21 constructed as described above will be described. When the desired disk is selected, the lifting / lowering means 51 is driven, the gantry 27 is displaced in the direction of arrow 52, and the interlocking member 82 is oscillated and displaced in the direction of arrow A1 accordingly, and the interlocking member 82 moves. The guide elongated hole 85 is the moving member 7.
The moving member 74 moves on the index member 72 in the insertion / ejection direction 73 by guiding the guide protrusion 79 of No. 4. At this time, when the light emitting / receiving element 75 reads the index 90 and detects an array of four indices corresponding to the desired disk storage position, the elevating means 51 is stopped and the insertion / ejection means 28 is driven to drive the disk 26. Is taken out.

Thereafter, the elevating means 51 is driven again, the disk 26 is placed at a predetermined reproducing position on the turntable, and reproduction is performed. Further, the disc 26 that has been reproduced is moved up and down again to the storage position by the elevating means 51, and then pushed and stored in the magazine 25 by the inserting and ejecting means 28. In this way, the disc 26 can be replaced.

As described above, the position where the compact disc 26 is stored in the magazine 25 can be detected by reading the index 90 formed on the index member 72 in a straight line while the moving member 74 shifts by one. The index member 72 can be formed to be elongated to reduce the space occupied by the index member 72, and the mounting position of the index member 72 can be selected relatively freely.

In this embodiment, the moving member 74 is provided with four sets of light emitting / receiving elements 75, and the index member 72 is provided with "00010".
The index 90 represented by “0110101111000” is formed, and the code is read in 15 different codes by shifting one by one in units of 4 in order.
However, as another embodiment of the present invention, the moving member 74 has three sets of light receiving and emitting elements 75.
Alternatively, the index 90 represented by “001011100” may be formed on the index member 72, and the index 90 may be sequentially read by shifting one by three. Also in this case "000"
However, since the position cannot be detected, the binary 3-bit number excludes "000", so that 2 ³ -1 = 7, and the storage positions of up to 7 disks 26 can be detected.

Further, as another embodiment of the present invention, the moving member 74 is provided with five sets of light receiving and emitting elements 75, and the index member 72 is provided.
To "00001000111011001101001
The index 90 represented by "0101111110000" may be formed, and the index 90 may be sequentially read by shifting one by five. In this case also, since the position cannot be detected by "000000", the binary 5-bit number excludes "00000", and therefore 2 ⁵ -1 = 31, and the storage positions of 31 discs 26 at the maximum can be detected.

The data detected by shifting the indexes 90 provided on the index member 72 of the above-described embodiment one by one in units of 3, 4, or 5 groups are shown in the table below. deep.

[0040]

[Table 1]

Further, as another embodiment of the present invention, although a pair of light emitting / receiving elements 75 are provided on the moving member 74 so as to be opposed to each other with the index member 72 interposed therebetween in the above-mentioned embodiment, the index member 74 is provided. A pair of light emitting and receiving elements 7 so as to face the
5 may be provided and the index 90 may be read by determining whether or not the light reflection processing is performed.

[0042]

As described above, according to the present invention, the accommodating position for accommodating a desired member can be set from the accommodating member accommodating a plurality of members in a stacked state. Since the index to be formed is formed so as to extend in the direction intersecting the vertical direction of the lifting device, the width between the respective indexes can be widened, and the index can be prevented from being erroneously detected even with respect to vibration and the like.

Preferably, the index is a binary code, and when the reading means is a pair of light emitting / receiving elements opposed to each other via the index member, is a through hole formed in the index member? It can be expressed by whether or not. Further, when the reading means is a pair of light emitting / receiving elements facing the index member, it can be represented by whether or not light reflection processing is performed.

Further, preferably, when the code is represented by a binary value of "0" and "1", it is represented by "001011100" when the number of stop positions of the lifting device is 7 or less, and 3
It is possible to detect a maximum of 7 positions by shifting and reading one by one. When the number of stop positions is 15 or less, "00010011010111100
It is represented by "0", and it is read by shifting it in units of 4 and the maximum is 1
Five positions can be detected. When the number of stop positions is 31 or less, "0000100011101"
10011010010101111110000 ", the number of positions can be detected in a maximum of 31 ways by shifting and reading in units of five.

In this way, the indexes are arranged on a straight line,
As described above, even if the data is shifted and read one by one, the mutually equal codes do not exist, the position can be detected, and the width of the index member provided with the index can be narrowed. The mounting position is not limited.

[Brief description of drawings]

FIG. 1 is a perspective view of a compact disc player 23 in which an up-and-down position detecting device 21 according to an embodiment of the present invention is used.

FIG. 2 is a partial side view showing an up-and-down position detecting device 21 in an enlarged manner.

FIG. 3 is an enlarged perspective view showing the vicinity of a moving member 74.

FIG. 4 is a front view showing an enlarged index member 72.

FIG. 5 is a side view for explaining a typical conventional elevation position detecting device 1.

FIG. 6 is a partial perspective view showing an enlarged view of the ascending / descending position detecting device 1 of FIG.

[Explanation of symbols]

21 Lifting position detection device 22 Autochanger device 23 Compact Disc Player 25 magazines 26 Compact Disc 27 mounts 51 Lifting device 60 Lifting position detection device 72 Index member 74 Moving member 75 Light emitting / receiving element 87 through hole 90 indicators

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 17/26 G11B 15/68

Claims (4)

(57) [Claims] 1. An elevating position detecting device for an elevating device capable of stopping at a plurality of stop positions, which is formed so as to extend in a direction intersecting the elevating direction of the elevating device and corresponds to each stop position of the elevating device. A plurality of index members provided with indexes at the intervals, a plurality of reading units arranged at the same intervals as the indexes along the intersecting direction, reading means for reading the presence or absence of the indexes, and interlocking with the vertical displacement of the lifting device, The reading means
Drive means for displacing on the index member in the intersecting direction, and control means for moving the lifting device up and down to a desired stop position in response to the reading result of each reading means, wherein the index is: Lifting position detection of a lifting device, characterized in that at each stop position of the lifting device, at least one reading means of the plurality of reading means is formed so as to output that the index is present as a reading result. apparatus. 2. A gantry that is provided adjacent to a storage member that stores a plurality of members in a stacked state and that discharges the member from the storage member and inserts the member into the storage member in the stacking direction of the members. In an up-and-down position detection device for an up-and-down device that vertically displaces at a position corresponding to a storage position of each member in a storage member, the up-and-down position detection device is formed to extend in a direction intersecting a vertical direction of the pedestal, Index members provided with indexes at intervals corresponding to stop positions, a plurality of reading units arranged at the same intervals as the indexes along the intersecting direction, for reading the presence or absence of the indexes, and interlocking with vertical displacement of the lifting device. Then, the reading means,
Drive means for displacing on the index member in the intersecting direction, and control means for moving the lifting device up and down to a desired stop position in response to the reading result of each reading means, wherein the index is: Lifting position detection of a lifting device, characterized in that at each stop position of the lifting device, at least one reading means of the plurality of reading means is formed so as to output that the index is present as a reading result. apparatus. 3. The index is a binary code, and when the code is represented by a binary value of “0” and “1”, the code attached to the index member has a stop position of 7 to be stopped. When it is less than or equal to "0100111100", when it is 15 or less, "00010011010111100"
It is represented by "0", and when it is 31 or less, "000010".
0011101100110100101011111
It is represented by "0000", The up-and-down position detection apparatus of the up-and-down apparatus of Claim 1 or 2 characterized by the above-mentioned. 4. The index is a binary code, each of the reading means is a pair of light emitting and receiving elements that are arranged to face each other via the index member, or face the index member, and the code is The lifting position detecting device for the lifting device according to claim 1 or 2, which is represented by whether or not a through hole is formed in the index member or whether or not a light reflection process is performed.