JP4360366B2 - Magnetic recording / reproducing device - Google Patents

Description

  The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a streamer device that includes a rotating drum and a tape loading mechanism and is used as an external storage device of a computer using a tape cassette, and has a tape width of W1. In addition to the first tape cassette in which the tape is accommodated, the second tape cassette in which the magnetic tape having the tape width W2 which is about twice the width W1 is accommodated can be selectively mounted. The present invention relates to a playback device.

  One streamer device used as an external storage device of a computer is provided with a rotating drum and a tape loading mechanism like a VTR, and a streamer device using a tape cassette has been commercialized.

  Currently, the storage capacity of the streamer device is large, for example, 72 Gbytes in the compression mode. However, there is a demand for an increase in storage capacity in the market, and in order to meet this demand, manufacturers are improving streamer devices.

One method for increasing the storage capacity is to make it possible to use a new tape cassette containing a magnetic tape having a tape width wider than that of the magnetic tape of the current tape cassette.
JP-A-6-150201

  Here, considering that the current streamer device is still in use and there are many current tape cassettes with information recorded by the current streamer device, the new streamer device that enables the new tape cassette to be used is the current streamer device. It is required that compatibility with the apparatus is ensured, the current tape cassette can be used, and the current tape cassette recorded by the current streamer apparatus can be normally reproduced.

  In view of the above circumstances, an object of the present invention is to provide a magnetic recording / reproducing apparatus that solves the problem.

  In order to solve the above problems, the present invention has the following means.

  According to a first aspect of the present invention, there is provided a rotary drum device provided on a chassis and having a magnetic head for reproducing magnetic recording on the magnetic tape or data recorded on the magnetic tape, and pulling out the magnetic tape from a tape cassette. A tape loading member that winds the magnetic tape around the rotating drum device; a loading guide that is supported above the chassis and moves the tape loading member from the vicinity of the tape cassette mounting portion to the vicinity of the rotating drum device; An elevating mechanism that elevates and lowers the tape loading member according to the type of the tape cassette, and the elevating mechanism includes an elevating member that elevates and lowers the tape loading member and a shaft that stands on the chassis. It is supported so that it can rotate, and it moves up and down as it rotates. A cam member that raises and lowers the material, a stopper member that stands on the chassis and is inserted into the lifting member, and restricts the upward movement position of the lifting member at the upper end of the stopper member. And a restricting portion.

  According to a second aspect of the present invention, the elevating member is engaged with a loading member elevating stage that supports the tape loading member, and a holding unit that holds a pressing member that presses the loading member elevating stage upward. It is characterized by having.

  The invention according to claim 3 is characterized in that the pressing member comprises a leaf spring and presses the loading member lifting stage against the lower surface of the loading guide.

  The invention according to claim 4 is characterized in that the height position of the restricting portion can be adjusted.

  According to the present invention, the elevating mechanism for elevating and lowering the tape loading member according to the type of the tape cassette mounted on the tape cassette mounting portion is movable by the elevating member for elevating and lowering the tape loading member and the shaft standing on the chassis. Supported by the cam member for raising and lowering the raising and lowering member in accordance with the pivoting operation, a stopper member standing on the chassis and inserted through the raising and lowering member, and a raising and lowering member at the upper end of the stopper member Since it has a restricting portion that restricts the upward movement position of the elevating member, it is prevented from being tilted by the restricting portion of the stopper member when the elevating member is raised, and the elevating member can be held in a state without a step with the loading guide Thus, the tape loading member raised by the elevating member can be smoothly moved to the loading guide.

  Therefore, by raising and lowering the tape loading member, it is possible to stably perform the tape loading operation in the magnetic recording / reproducing apparatus configured to selectively mount a plurality of tape cassettes containing magnetic tapes having different tape widths. The reliability of the apparatus can be further increased.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  This will be described in the following order.

1. Outline of streamer device 30,
2. Configuration of tape cassettes 10 and 20,
3. Outline of tape loading operation,
4). Tape loading operation from the current tape cassette 10,
5. Tape loading operation from the new tape cassette 20,
6). Mechanism for common operation,
7). Common operation,
8). Individual operation mechanism,
9. Individual operation.

  FIG. 1 shows a streamer device 30 according to a first embodiment of the present invention. First, the function and operation of the streamer device 30 will be schematically described.

1. [Outline of Streamer Device 30]
1 and 2 show a state before the cassette is mounted. X1-X2 is the width direction, Y1-Y2 is the depth direction, and Z1-Z2 is the height direction. The streamer device 30 can selectively mount the current tape cassette 10 and the new tape cassette 20 and can record information on a magnetic tape having a width of 4 mm or a magnetic tape having a width of 8 mm. is there. For this purpose, the rotary drum device 31 has a larger diameter D, a higher height, and a rotation of a magnetic tape having a width of 8 mm, compared with the rotary drum device provided in the conventional streamer device. The winding angle around the drum device 31 is made larger than the winding angle of a magnetic tape having a width of 4 mm. As shown in FIG. 7A, the rotary drum device 31 includes a lower fixed drum 31a and an upper rotary drum 31b. A rotary head is fixed to the lower surface of the rotary drum, and the fixed drum is magnetically connected. The tape guide 31c for guiding the lower edge of the tape is formed.

  The streamer device 30 transmits the rotation of a cassette mounting mechanism (not shown), a single rotating drum device 31 having a plurality of rotating heads, a single common operation motor 40, and a common operation motor 40. The first transmission mechanism 50, the single individual operation motor 60, and the clockwise rotation of the individual operation motor 60 are transmitted to the first portion, and the counterclockwise rotation of the individual operation motor 60 is second. A second transmission mechanism 70 that transmits power to this portion, a common operation motor drive circuit 80, an individual operation motor drive circuit 81, a control circuit 82 composed of a microcomputer, and the like. The cassette mounting mechanism includes a housing that matches the new tape cassette 20 and is configured such that the current tape cassette 10 and the new tape cassette 20 can be selectively mounted. The rotary drum device 31 is inclined substantially in the center in the X2 direction, the common operation motor 40 is on the X1 side of the Y1 side edge, and the individual operation motor 60 is on the X2 side of the Y1 side edge. The first transmission mechanism 50 is disposed near the common operation motor 40, and the second transmission mechanism 70 is disposed near the individual operation motor 60. Here, the motor is divided into the common operation motor 40 and the individual operation motor 60, and the second transmission mechanism 70 can change the other party to transmit the rotation according to the rotation direction, thereby enabling the individual operation. A single motor 60 is sufficient. As a result, the streamer device 30 is small.

  The common operation motor 40 is driven when operating a common tape loading mechanism associated with both 4 mm and 8 mm wide magnetic tapes. The rotation of the common operation motor 40 is transmitted to the common tape loading mechanism via the first transmission mechanism 50, and the common tape loading mechanism is operated.

  The individual operation motor 60 is driven to rotate clockwise when operating a 4 mm width magnetic tape loading mechanism related to a magnetic tape having a width of 4 mm, and the 8 mm width magnetic tape loading mechanism related to a magnetic tape having a width of 8 mm. When operated, it is rotated counterclockwise. The clockwise rotation of the individual operation motor 60 is transmitted to the 4 mm width magnetic tape loading mechanism via the second transmission mechanism 50, and the 4 mm width magnetic tape loading mechanism is operated. The counterclockwise rotation of the individual operation motor 60 is transmitted to the 8 mm width magnetic tape loading mechanism via the second transmission mechanism 50, and the 8 mm width magnetic tape loading mechanism is operated.

  The streamer device 30 further includes loading poles P0 to P9 (hereinafter simply referred to as poles), a capstan 90, a pinch roller 100, and a head cleaner 110. The poles are common poles P0, P1, P2, P3 and P9 for magnetic tapes of 4 mm and 8 mm in width, and poles P4 (4) and P5 (4) dedicated to a 4 mm wide magnetic tape, and a magnetic tape of 8 mm wide Are composed of dedicated poles P4 (8), P5 (8), P6, P7, and P8. Here, numerals 4 and 8 in parentheses indicate the width of the magnetic tape in mm. The poles P0, P1, P2, and P3 constitute a common tape loading mechanism, and the poles P4 (4) and P5 (4) constitute a 4 mm width magnetic tape loading mechanism, and the poles P4 (8), P5 (8), and P6 , P7, P8 constitute an 8 mm width magnetic tape loading mechanism. Here, since there is a common tape loading mechanism that is commonly used for magnetic tapes of 4 mm width and 8 mm width, the pole is shared, and the tape loading mechanism is combined with a tape loading mechanism dedicated to 4 mm width magnetic tape and 8 mm. Compared to the case where a tape loading mechanism dedicated to the width magnetic tape is provided, the number of poles can be reduced.

  The pole is composed of fixed poles P0, P2, P3, P6, P7 and moving poles P1, P4 (4), P4 (8), P5 (8), P8, P5 (4), P9. . The pole P0 is disposed on the X2 side near the tape cassette mounting portion. The poles P2 and P3 are inclined in the direction in which the upper ends approach each other, form a pair, and are disposed on the entrance side with respect to the rotating drum device 31 in the traveling direction of the magnetic tape, and give a twist to the magnetic tape. The poles P6 and P7 are inclined in a direction in which the upper ends are separated from each other, form a pair, are arranged on the outlet side with respect to the rotating drum device 31 in the traveling direction of the magnetic tape, and give a twist to the magnetic tape. The capstan 90 is disposed on the X1 side near the tape cassette mounting portion. The pinch roller 100 is normally located at a high position and is located near the capstan 90. The moving poles P1, P4 (4), P4 (8), P5 (8), P8, P5 (4), P9 are arranged in this order from the X2 side toward the X1 direction on the tape cassette mounting portion. Yes.

  Of the moving poles P1, P4 (4), P4 (8), P5 (8), P8, P5 (4), P9, the poles P1, P5 (8), P8, P9 are poles P4 (4 ), Longer than P5 (4). The long poles P1, P4 (8), P8, and P9 are in a position lowered in the Z2 direction, and all the moving poles P1, P4 (4), P4 (8), P5 (8), P8, P5 ( 4) The height of the upper end of P9 is aligned. This is because, as will be described later, the current tape cassette 10 is mounted at the same height as the new tape cassette 20 and mounted without interfering with the pole P1 or the like.

2. [Configuration of Tape Cassette 10, 20]
Next, the tape cassette will be described with reference to FIG.

  In the current tape cassette 10, a magnetic tape 14 is wound around a supply reel 15 and a take-up reel 16 inside a cassette body 13 composed of a box 11, a front lid 12 and a bottom slide plate (not shown). In this configuration, a tape path 17 is formed along the back surface of the lid 12 and accommodated, and a pole housing space 18 opened at the time of mounting is provided in a portion near the front surface of the bottom surface. The new tape cassette 20 has a magnetic tape 24 in a supply reel 25 and a take-up reel 26 inside a cassette body 23 composed of a box 21, a front lid 22 and a bottom slide plate (not shown). A tape path 27 that is wound and is formed along the back surface of the lid 22 is formed and housed, and a pole housing space 28 that is opened at the time of mounting is provided on the bottom surface of the bottom surface. The size of the new tape cassette 20 is the same as the current tape cassette 10 in the length A and the width B, and the height C1 is about 1.5 times the height C of the current tape cassette 10. A recess 29 is formed at the center of the rear end of the bottom surface of the box 21 of the new tape cassette 20.

  In the streamer device 30, a supply reel shaft device 32, a take-up shaft device 33, and a tape cassette identification switch 34 are provided in a portion where the current tape cassette 10 and the new tape cassette 20 are mounted. Also, the tape cassette mounting mechanism is configured such that the new tape cassette 20 is mounted with the bottom surface being the same height as the bottom surface when the current tape cassette 10 is mounted.

3. [Outline of tape loading operation]
Next, the tape loading operation of the streamer device 30 will be schematically described.

  When the current tape cassette 10 is mounted, as shown in FIG. 3, the current tape cassette recognition operation 120, the poles P1 and P9 movement operation 121, the poles P4 (4) and P5 (4) movement operation 122, and the pinch roller movement operation 123, the head cleaner moving operation 124 is performed in this order.

  When the new tape cassette 20 is mounted, as shown in FIG. 4, the new tape cassette recognition operation 130, the poles P1, P5 (8), P8, P9 raising operation 131, the poles P1, P9 moving operation 132, the pole P5 ( 8), P8, P4 (8) moving operation 133, pinch roller moving operation 134, and head cleaner moving operation 135 are performed in this order.

  The poles P1 and P9 moving operations 121 and 131, the pinch roller moving operations 123 and 134, and the head cleaner moving operations 124 and 135 are common operations. These operations are performed when the common operation motor 40 is driven to rotate clockwise. Is called.

  The poles P4 (4) and P5 (4) moving operation 121 is an operation unique to the current tape cassette 10. Pole P1, P5 (8), P8, P9 raising operation 131 and pole P5 (8), P8, P5 (8) moving operation 133 are operations unique to the new type tape cassette 20. These operations are performed by rotating the individual operation motor 50. Operation 122 that is unique to the current tape cassette 10 is performed by rotating the individual operation motor 50 counterclockwise, and operation 131 and operation 133 that are unique to the new tape cassette 20 are individual operations. Contrary to the above, the motor 50 is driven to rotate clockwise. 3 and 4, circle marks indicate the motor to be driven and the rotation direction thereof.

  When the current tape cassette 10 is mounted and operations 121, 122, and 123 are performed as shown in FIG. 3, tape loading is performed, and the streamer device 30 becomes as shown in FIGS. Forms a tape path 17-2, and as shown in FIG. 7 (A), the rotary drum device 31 is obliquely guided by the tape guide 31c over an angle α1 (about 90 degrees) from S to E1. As shown in FIG. 7B, the rotary head scans the magnetic tape 14 as indicated by an arrow 162, and information is recorded with a track pattern 160 having an angle θ. The track pattern 160 has the same track pattern as that of the current streamer device, and has a so-called backward compatibility. FIG. 7B shows the magnetic tape 14 as viewed from the side opposite to the magnetic film surface, that is, the Y2 side. Note that the winding angle α1 is an angle necessary for forming the track pattern 160 to substantially the full width of the magnetic tape 14. Reference numeral 162 denotes a direction in which the rotary head scans the magnetic tape 14.

  When the new tape cassette 20 is mounted and operations 131, 132, 133, and 134 are performed as shown in FIG. 5, tape loading is performed and the streamer device 30 becomes as shown in FIGS. The tape 24 forms a tape path 27-4, and as shown in FIG. 7A, the tape 24 is guided to the rotary drum unit 31 by the tape guide 31c from S to E2 over an angle α2 (about 180 degrees). As shown in FIG. 7C, the rotary head scans the magnetic tape 24 as indicated by an arrow 162, and information is recorded by the track pattern 161. The track pattern 161 is a track pattern obtained by extending the track pattern 160 described above, and the recording capacity is significantly larger than that of the current tape cassette 10. FIG. 7C shows the magnetic tape 24 as viewed from the side opposite to the magnetic film surface. Note that the winding angle α2 is set to an angle necessary for forming the track pattern 161 to substantially the full width of the magnetic tape 24.

  The winding start position S of the magnetic tape 14 around the rotary drum device 31 and the winding start position S of the magnetic tape 24 around the rotary drum device 31 are the same.

4). [Tape loading operation from current tape cassette 10]
Next, tape loading when the current tape cassette 10 is loaded will be described in more detail with reference to FIGS.

  As shown in FIG. 2, the streamer device 30 includes passages 140 to 145 for moving the poles, and stoppers 151, 152, and 154.

  8A and 8B show a state when the current tape cassette 10 is mounted. The current tape cassette 10 is mounted with the bottom surface at a height H0. A slide plate (not shown) is slid, the supply reel 15 and the take-up reel 16 are fitted to the supply reel shaft device 32 and the take-up shaft device 33, the lid 12 is opened, and the pole is placed in the pole housing space 18. P1, P4 (4), P4 (8), P5 (8), P8, P5 (4), and P9 enter relatively. The tape cassette identification switch 32 is pushed by the cassette body 13 and the current cassette recognition operation 120 is performed.

  First, the pole P1, P9 moving operation 121 is performed. As shown in FIG. 9, the common operation motor 40 is driven to rotate in the clockwise direction, the first transmission mechanism 50 operates, and the pole P1 moves in the approximately X2 direction and the pole P9 moves in the approximately X2 direction. The magnetic tape 14 is pulled out of the tape cassette, and the first tape path 17-1 is formed.

  Subsequently, the pole P4 (4), P5 (4) moving operation 122 is performed. As shown in FIG. 10, the individual operation motor 60 is driven to rotate in the clockwise direction, the second transmission mechanism 70 operates, and the pole P4 (4) is fitted to the guide rail portion 147 on the X2 side of the passage 141. Then, while holding this (see FIG. 27), it is moved to the position where it presses against the stopper 151 in the approximately Y1 direction along this, and the pole P5 (4) is moved to the stopper 154 in the approximately Y1 direction along the passage 144. The poles P4 (4) and P5 (4) pull out the magnetic tape 14 further, the tape path 17-1 further expands, and the magnetic tape 14 moves to the rotary drum device 31 from the position S to the position E1. A final tape path 17-2 that is wound obliquely over an angle α1 (about 90 degrees) and hits the capstan 90 is obtained. The pole P5 (4) and the magnetic tape 14 pass through the Z2 side of the pinch roller 100 without interfering with the pinch roller 100.

  In the final tape path 17-2, the magnetic tape 14 exits from the supply reel 15 side of the current tape cassette 10, is guided to the poles P0 and P1, and is guided and twisted by the poles P2 and P3. Next, it is wound around the rotary drum device 31 between the poles P4 (4) and P5 (4), and then guided to the capstan 90 and the pole P9, and enters the take-up reel 16 side of the current tape cassette 10. Pass.

  Subsequently, a pinch roller moving operation 123 is performed. As shown in FIG. 11, the common operation motor 40 is driven to rotate in the clockwise direction, the first transmission mechanism 50 is operated, and the pinch roller 100 is first lowered in the Z2 direction to be within the tape path 17-2. Then, it is moved in the X1 direction and is crimped to the capstan 90, and the magnetic tape 14 starts to travel in the direction of the arrow 139 to start recording or reproducing information.

  Here, the winding end of the magnetic tape 14 around the rotary drum device 31 is E1, and the magnetic tape 14 rotates immediately before the rotary head that scans the magnetic tape 14 obliquely reaches the upper edge of the magnetic tape 14. The drum device 31 is separated from the peripheral surface. Therefore, the rotating head does not cross the upper edge of the magnetic tape 14, and the magnetic tape damage caused by the rotating head crossing the upper edge of the magnetic tape 14 does not occur.

  Subsequently, a head cleaner moving operation 124 is performed. Similarly, as shown in FIG. 11, the common operation motor 40 is driven to rotate in the clockwise direction, the first transmission mechanism 50 is operated, and the head cleaner 110 is moved as indicated by the two-dot chain line to rotate the rotating drum. The rotating head is cleaned by contact with the device 31.

  The tape unloading operation is performed by moving each of the above components in the reverse order to the above and in the reverse direction.

5. [Tape loading operation from new tape cassette 20]
Next, tape loading when the new tape cassette 20 is mounted will be described in more detail with reference to FIGS.

  FIGS. 12A and 12B show the state when the new tape cassette 20 is mounted. The new tape cassette 20 is mounted with the bottom surface at a height H0. A slide plate (not shown) is slid, the supply reel 25 and the take-up reel 26 are fitted into the supply reel shaft device 32 and the take-up shaft device 33, respectively, the lid 22 is opened, and the pole is placed in the pole housing space 28. P1, P4 (4), P4 (8), P5 (8), P8, P5 (4), and P9 enter relatively. The recess 29 faces the tape cassette identification switch 32, and the tape cassette identification switch 32 is not pushed, and a new cassette recognition operation 130 is performed. Moreover, the height of the magnetic tape 24 is a height whose lower edge is the same height H11 as the lower edge of the magnetic tape 14 of the current tape cassette 10 that is mounted.

  First, poles P1, P5 (8), P8, and P9 ascending operation 131 are performed. As shown in FIGS. 13A and 13B, the individual operation motor 60 is driven to rotate counterclockwise, the second transmission mechanism 70 operates, and the pole lifting mechanism 280 and the like (see FIG. 30). Are operated, and the poles P1, P5 (8), P8, and P9 rise in the Z1 direction in the pole housing space 28 and face the full width of the 8 mm wide magnetic tape 24. Here, if the magnetic tape is locked and pulled out in a state where the pole is not opposed to the full width of the 8 mm wide magnetic tape 24, the locking is incomplete and the magnetic tape is damaged. However, when the pole P1 or the like is in the state of facing the entire width of the 8 mm wide magnetic tape 24 as described above, the magnetic tape 24 can be locked and pulled out without being damaged. Further, the poles P5 (8) and P8 stand up from the loading member 400, respectively. The loading member 400 is guided by a loading guide portion 410 provided in a subchassis described later, and moves to the vicinity of the rotary drum device 31 from the tape cassette mounting portion on which the tape cassette 20 is mounted.

  Note that the above operation 131 is performed so that the current tape cassette 10 is mounted at the same height as the new tape cassette 20 and is moved so as not to interfere with the pole P1 or the like. This is because the poles P1, P4 (4), etc. have the same height at the upper end, and the long poles P1, P5 (8), etc. are in a position lowered in the Z2 direction.

  Next, the poles P1 and P9 moving operation 132 is performed. As shown in FIG. 14, the common operation motor 40 is driven to rotate in the clockwise direction, the first transmission mechanism 50 operates, the pole P1 moves in the substantially X2 direction, and the pole P9 moves in the approximately X2 direction. The magnetic tape 24 is pulled out of the tape cassette, and the first tape path 27-1 is formed.

  Subsequently, the movement operation 133 is performed after the movement of the poles P5 (8) and P8 and the delay of the pole P4 (8). First, as shown in FIG. 15, the individual operation motor 60 is rotationally driven in the counterclockwise direction, the second transmission mechanism 70 operates, and the pole P5 (8) moves along the passage 142 and the pole P8. Starts to move in the substantially Y1 direction along the path 143, further pulls out the magnetic tape 24, and the tape path 27-1 further expands to become the tape path 27-2 in a state where the magnetic tape 14 contacts the rotary drum device 31. . As shown in FIG. 16, with a slight delay, the pole P4 (8) starts moving substantially in the Y1 direction. The pole P4 (8) is moved along the guide rail portion 146 on the X1 side of the passage 141 while sandwiching it. The guide rail portion 146 has a slope portion 146a having a slope in the Z1 direction in the middle, and the pole P4 (8) rises in the Z1 direction in the middle of movement and becomes a height facing the magnetic tape 24. The pole P4 (8) is moved thereafter to lock the magnetic tape 24 and move while locking the magnetic tape 24.

  Here, the first reason for delaying the start of the movement of the pole P4 (8) is to make the streamer device 30 as small as possible. Therefore, the pole P4 (8) is not provided with a dedicated passage. This is because the passage 141 of (4) is used, and secondly, the height of the pole P4 (8) is raised in the middle of movement along with this, and the third This is because the position of the magnetic tape 24 is separated from the new tape cassette 20 as much as possible in the Y1 direction so that the raising is completed before the pole P4 (8) reaches the position of the magnetic tape 24.

  As shown in FIG. 17, the pole P4 (8) reaches the stopper 151, the pole P5 (8) reaches the stopper 152, and the pole P8 reaches the stopper 153 almost at the same time. The magnetic tape 24 is further expanded through the state of the tape path 27-3, and the magnetic tape 24 is wound around the rotary drum device 31 at an angle α2 (about 180 degrees) from the position S to the position E2, and the capstan 90 Is the final tape path 27-4. The pole P8 and the magnetic tape 24 pass through the Z2 side of the pinch roller 100 without interfering with the pinch roller 100.

  In the final tape path 27-4, the magnetic tape 24 exits from the supply reel 25 side of the new tape cassette 20, is guided to the poles P0 and P1, and is guided and twisted by the poles P2 and P3. Next, it is wound around the rotating drum device 31 between the poles P4 (4) and P5 (8), and then guided and twisted by the poles P6 and P7, and then the poles P8, capstan 90 This path is guided by the pole P9 and enters the take-up reel 26 side of the new tape cassette 20.

  Subsequently, a pinch roller moving operation 134 is performed. As shown in FIG. 18, the common operation motor 40 is driven to rotate in the clockwise direction, the first transmission mechanism 50 is operated, and the pinch roller 100 is first lowered in the Z2 direction to enter the tape path 27-4. Then, it is moved in the X1 direction and is crimped to the capstan 90, and the magnetic tape 24 starts to travel in the direction of the arrow 139 to start recording or reproducing information.

  Here, the winding end of the magnetic tape 24 around the rotary drum device 31 is E2, and the magnetic tape 24 rotates immediately before the rotary head that scans the magnetic tape 24 obliquely reaches the upper edge of the magnetic tape 24. The drum device 31 is separated from the peripheral surface. Therefore, the rotating head does not cross the upper edge of the magnetic tape 24, and the magnetic tape damage caused by the rotating head crossing the upper edge of the magnetic tape 24 does not occur.

  Subsequently, a head cleaner moving operation 135 is performed. Similarly, as shown in FIG. 18, the common operation motor 40 is rotationally driven in the clockwise direction, the first transmission mechanism 50 is operated, and the head cleaner 110 is moved as indicated by a two-dot chain line to rotate the rotating drum. The rotating head is cleaned by contact with the device 31.

  The tape unloading operation is performed by moving each of the above components in the reverse order to the above and in the reverse direction.

  Further, since the magnetic tape 14 (24) is twisted by the fixed pole P2 and the pole P3 at a position just before reaching the rotary drum device 31 in the traveling direction, the magnetic tape 14 (24) is moved and pulled out. The poles that cause the magnetic tape 14 (24) to follow the rotary drum device 31 and determine the position of the outlet side of the magnetic tape 14 (24) to the rotary drum device 31 are vertical poles P4 (4), P4. (8) is enough. Further, since the magnetic tape 24 is twisted by the fixed pole P6 and the pole P7 at the position after coming out of the rotary drum device 31 in the running direction, the magnetic tape 24 is moved out and the magnetic tape 24 is pulled out. The vertical pole P5 (8) is sufficient as the pole for determining the position of the outlet side of the device 31. As a result, all the moving poles can enter the range of the size of the pole housing space 18 (28).

6). [Common operation mechanism]
Next, the common operation motor 40, the first transmission mechanism 50, and the mechanism and operation that are moved by the power from the first transmission mechanism 50 will be described.

  FIG. 19 shows the first transmission mechanism 50 when the streamer device 30 is in the state shown in FIG. 1 in a posture looking up from the lower side of the streamer device 30. Reference numeral 170 denotes an operation state detection substrate, which is provided with a plurality of photo reflectors. Reference numeral 171 denotes a common mode switch gear. A mode switch pattern is formed on the lower surface, and a cam portion 172 is provided on the upper surface side. The operation state detection board 170 detects the operation state of the first transmission mechanism 50 by optically detecting the rotational angle position of the common mode switch gear 171 by combining the outputs from the plurality of photo reflectors. As shown in FIG. 2, the detection signal from the operation state detection board 170 is sent to the control circuit 82, the motor drive circuit 80 is operated by the control signal from the control circuit 82, and the common operation motor 40 is set to a predetermined timing. 3 is started and stopped, pole P1, P9 moving operation 121 in FIG. 3, pinch roller moving operation 123, head cleaner moving operation 124, and pole P1, P9 moving operation 131, pinch roller moving operation 134 in FIG. A head cleaner moving operation 135 is performed. Reference numeral 172 denotes a tape cassette mounting arm, which is rotated by a cam portion 172 to operate a tape cassette mounting mechanism (not shown). Here, since the common mode switch gear 171 itself has a function of a mode switch, the mode position is determined with higher accuracy than a configuration in which the function of the mode switch is provided in a portion other than the gear 171.

7). [Common operation]
[Pole P1, P9 Movement Operation 121 (131)] (See FIGS. 20 and 21)
The pole P1 is fixed to the tip of the arm 181. The pole P9 is fixed to the tip of the arm 183. A sleeve 182 is fixed to the base of the arm 181, and the sleeve 182 is supported by being fixed to a fixed post 185 (see FIG. 30) implanted in the chassis base so as to be rotatable and slidable. . A sleeve 185 is fixed to the base of the arm 183, and this sleeve 185 is supported by being fixed to a fixed post 187 (see FIG. 30) implanted in the chassis base so as to be rotatable and slidable. .

  When the common operation motor 40 is driven, the gear mechanism 174 is driven via the worm gear mechanism 41, and the drive gear 175 is rotated clockwise in FIG. 20, and as shown in FIG. Is slid in the Y2 direction, and the slide lever 180 is slid in the Y2 direction via the rotation lever 177, the link 178, and the rotation lever 179. As the slide lever 180 slides, the arm 181 rotates counterclockwise about the fixed post 185, and the pole P1 is moved. Further, as the slide lever 176 slides, the arms 184 and 183 are rotated clockwise around the fixed post 187, and the pole P9 is moved.

[Pinch roller moving operation 123 (134)] (see FIG. 19)
When the common operation motor 40 is driven, the cylindrical cam 102 at the base of the pinch roller support arm 101 is lowered in the Z2 direction while being guided by the vertical groove by the spiral cam mechanism 181 and reaches the end of the vertical groove. Then, it is rotated in the direction of arrow 183. The pinch roller 100 is pressed against the capstan 90 by a spring force.

[Head cleaner moving operation 124 (135)] (see FIG. 19)
When the common operation motor 40 is driven, the common mode gear 171 is rotated, the arm member 111 is rotated by the cam 184 integral with the common mode switch gear 171, and the head cleaner 110 is moved to contact the rotary drum device 31. Is done.

  When the common mode gear 171 is rotated until the head cleaner 110 is moved and then rotated in the opposite direction to the above, each of the above operations is performed as operation 124 (135), operation 123 (134), operation 121 (131) is performed in this order, and each component is moved in the opposite direction to the above to return to the initial state.

8). [Individual operation mechanism]
Next, the mechanism and the operation that are moved by the power from the individual operation motor 60, the second transmission mechanism 70, and the second transmission mechanism 70 will be described.

  22, 23 and 24 show the state of the second transmission mechanism 70 of the streamer device 30. 22 is a perspective view of the second transmission mechanism 70 as viewed from above, and FIG. 23 is a perspective view of the second transmission mechanism 70 as viewed from below. FIG. 24 shows the state of the second transmission mechanism 70 when the streamer device 30 is in the state shown in FIG. This state is called an initial state. FIG. 22 shows the state when the poles P1, P5 (8), P8, and P9 ascending operation 131 are completed for the convenience of illustration.

  As shown in FIGS. 22, 23, 24, and 23, the second transmission mechanism 70 includes an individual mode switch gear 200, a first drive gear 210, a second drive gear 220, and a third drive gear. It has a drive gear 230 and an operation state detection substrate 240. The individual mode switch gear 200 is arranged coaxially with the common mode switch gear 171 on the Z2 side of the common mode switch gear 171. The first, second, and third drive gears 210, 220, and 230 are arranged around the individual mode switch gear 200, and as described later, the rotation of the individual mode switch gear 200 is transmitted at different timings. Driven temporarily. Further, a mode switch pattern 209 is formed on the lower surface of the individual mode switch gear 200, and the operation state detection substrate 240 has a plurality of photo reflectors, and an individual mode switch is selected depending on a combination of outputs from the plurality of photo reflectors. The rotational angle position of the gear 200 is optically detected, and the operation state of the second transmission mechanism 70 is detected.

  As shown in FIG. 2, the detection signal from the operation state detection board 240 is sent to the control circuit 82, the motor drive circuit 81 is operated by the control signal from the control circuit 82, and the individual operation motor 60 is set to a predetermined timing. 3 is started and stopped, poles P4 (4) and P5 (4) moving operation 122 in FIG. 3, poles P1, P5 (8), P8, P9 raising operation 131 and pole P5 (8), FIG. The movement operation 133 is performed after the P8 movement and the pole P4 (8). Here, since the individual mode switch gear 200 itself has a function of a mode switch, the mode position is determined with higher accuracy than a configuration in which the function of the mode switch is provided in a portion other than the gear 200.

  The individual mode switch gear 200 has a gear part 201, a concave part 202, and an arc-shaped concave part 203 on the entire periphery, and has a partial gear part 205 and a cam part 206 in a step shape on the upper surface. The concave portion 202 and the arc-shaped concave portion 203 are formed by cutting out half of the gear portion 201 on the Z2 side. The recess 202 and the arc-shaped recess 203 are adjacent to each other with the protrusion 207 interposed therebetween. The arc-shaped recess 203 extends over about 120 degrees. The all-around gear portion 201 includes a full-width gear portion 201a and a half-width gear portion 201b. The cam portion 206 includes a concave portion 206a, a shallow arc-shaped concave portion 206b following the concave portion 206a, and a pin portion 206c adjacent to the concave portion 206a.

  The first drive gear 210 has a partial gear portion 211. A projection 212 is provided at one end of the partial gear 211. In the initial state, the partial gear portion 211 is not engaged with the partial gear portion 205 described above. The first drive gear 210 rotates by a predetermined angle to perform the movement operation 122 of the poles P4 (4) and P5 (4).

  The second drive gear 220 has three protrusions 221, 222, and 223 protruding in the outer peripheral direction. An arcuate recess 224 is formed between the protrusions 221 and 223 at both ends. The projecting portion 222 is disposed substantially at the center of the arc-shaped recess 224 and projects from the vicinity of the upper end of the second drive gear 220. In the initial state, the protrusion 221 is fitted in the recess 206a. The second drive gear 220 rotates by a predetermined angle to cause the poles P1, P5 (8), P8, P9 ascending operation 131 to be performed.

  The third drive gear 230 has a structure in which an upper drive gear 235 and a lower drive gear 236 overlap each other and a torsion coil spring 237 is incorporated therebetween. The upper drive gear 235 and the lower drive gear 236 are normally rotated integrally. The upper drive gear 235 has a gear portion 235a on the entire circumference. The lower drive gear 236 has a gear portion 231 extending approximately 270 degrees, and has first and second projecting portions 232 and 233 protruding in the outer peripheral direction at a missing tooth portion extending approximately 90 degrees. The first and second protrusions 232 and 233 are arranged slightly apart in the circumferential direction. The first protrusion 232 protrudes greatly corresponding to the depth of the recess 202. The second protrusion 233 protrudes small corresponding to the arcuate recess 203. In the initial state, the second protrusion 233 is fitted in the arc-shaped recess 203, and the partial gear portion 231 is not engaged with the gear portion 201. The third drive gear 230 is rotated by a predetermined angle to cause the movement operation 133 of the poles P5 (8), P8, P4 (8). The torsion coil spring 237 is twisted at the final stage of operation to generate a force that presses the poles P5 (8), P8, P4 (8) against the stopper.

  Next, the rotation transmission operation from the individual mode switch gear 200 to the first, second, and third drive gears 210, 220, and 230 will be described.

  When the individual operation motor 60 is driven and rotated, for example, clockwise, the individual mode switch gear 200 is rotated approximately 30 degrees clockwise through the worm gear mechanism 61, and the individual operation motor 60 is rotated reversely and rotated counterclockwise. Then, the individual mode switch gear 200 is rotated approximately 360 degrees counterclockwise.

  When the individual mode switch gear 200 is rotated clockwise by a predetermined angle from the initial state, as shown in FIG. 25A, the protrusion 212 is pushed and the gear portion 205 is engaged with the partial gear portion 211 so that the first The drive gear 210 is rotated counterclockwise as shown in FIG. 25 (B) to the position shown in FIG. 25 (C). During this time, the second and third drive gears 220 and 230 remain stopped. When the individual mode switch gear 200 is rotated in the direction returning from the rotated state to the initial state, the first drive gear 210 is rotated clockwise and returned to the initial state.

  When the individual mode switch gear 200 is rotated counterclockwise by a predetermined angle from the initial state, first, as shown in FIG. 26 (A), the protrusion 221 is pushed by the end of the recess 206a, and the second The drive gear 220 is rotated by a predetermined angle in the clockwise direction. When the second drive gear 220 is rotated and the protrusion 221 comes out of the recess 206a, the recess 224 faces the cam 206 as shown in FIG. 26B, and the second drive gear 220 is thereafter Stopped in position. The protruding portion 222 reaches the upper surface side of the cam portion 206.

  When the individual mode switch gear 200 is further rotated counterclockwise, the end of the arcuate recess 203 pushes the second protrusion 233 as shown in FIG. Next, as shown in FIG. 26C, the gear portion 201a and the gear portion 231 are engaged with each other, and the third drive gear 230 is rotated in the clockwise direction. When the third drive gear 230 rotates about 270 degrees, as shown in FIG. 27 (A), the first protrusion 232 enters the recess 202, and subsequently, as shown in FIG. 27 (B), the protrusion The portion 207 pushes the first protrusion 232 to transmit the rotation strongly to the third drive gear 230 and rotate it to the final position shown in FIG. The first protrusion 232 comes out of the recess 202, and the second protrusion 233 enters the arcuate recess 203. During this time, the first drive gear 210 maintains a stopped state.

  When the individual mode switch gear 200 is rotated in the direction returning from the rotated state to the initial state, the third drive gear 230 is first rotated counterclockwise to return to the initial state, and then The pin portion 206c pushes the protrusion 222, and the second drive gear 220 is rotated counterclockwise to return to the initial state.

9. [Individual operation]
Next, the operations 122, 131, and 133 will be described.

[Pole P4 (4), P5 (4) moving operation 122] (see FIGS. 28 and 29)
FIG. 28 shows an initial state, and FIG. 29 shows a state in which the movement of the poles P4 (4) and P5 (4) is completed. When the first drive gear 210 is rotated counterclockwise by the individual mode switch gear 200, the slide lever 250 is slid in the Y2 direction, and the slide lever 252 is slid in the X2 direction via the rotation lever 251. . As the slide lever 252 slides, first, the rotation lever 253 is rotated clockwise about the fixed shaft 254, and the rotation lever 256 is rotated counterclockwise about the fixed shaft 257 via the link 255. Is rotated. 28. The turning force of the rotating lever 256 is transmitted to the pole P4 (4) through the link 258, and the pole P4 (4) starts to move in the substantially Y1 direction along the guide rail portion 147. As shown in FIG. Move to position 151. Secondly, the slide lever 252 slides to rotate the rotation lever 260 clockwise about the fixed shaft 261. This rotation is transmitted to the pole P5 (4) via the link 262, and the pole P5. (4) starts to move substantially in the Y1 direction and moves to the position of the stopper 155 as shown in FIG.

  When the first drive gear 210 is rotated clockwise from the rotated position and returned, the mechanism is returned from the state shown in FIG. 29 to the initial state shown in FIG.

[Pole P1, P5 (8), P8, P9 ascent operation 131] (see FIGS. 30 to 33)
FIG. 30 shows an initial state in which the poles P1, P5 (8), P8, and P9 are lowered, and FIG. 31 shows a state in which the poles P1, P5 (8), P8, and P9 have finished raising.

  When the second drive gear 220 is rotated clockwise by the individual mode switch gear 200, the slide lever 300 is slid in the Y1 direction, and the slide lever 302 is slid in the X1 direction via the rotation lever 301. The slide lever 300 has a cam groove 304, and the slide lever 302 has racks 305 and 306.

  Regarding the pole P1, a pole lifting mechanism 270 based on the seesaw principle is provided. For the poles P5 (8) and P8, a spiral cam type pole lifting mechanism 280 is provided. For the pole P9, a spiral cam type pole lifting mechanism 290 is provided.

  In the pole elevating mechanism 270, the lever 271 supports the central shaft 272 on the bracket 275 so that the lever 271 can swing, and the pin 273 at the end in the Y1 direction of the lever 271 is fitted in the cam groove 304 of the slide lever 300. In addition, the fork portion 274 at the end of the lever 271 in the Y2 direction is connected to the sleeve 182.

  When the slide lever 300 is slid in the Y1 direction, as shown in FIG. 31, the lever 271 is rotated by the cam groove 300a in the direction in which the fork portion 274 rises, and the sleeve 182 is moved along the fixed post 186 in the Z1 direction. And the pole P1 is raised.

  As shown in FIG. 32, the pole lifting mechanism 280 includes a spiral cam member 281 and a lifting member 285. The spiral cam member 281 has a spiral cam groove 282 around the cylindrical portion and a gear 283 at the lower end, and is fitted and supported by a fixed post implanted in the chassis base. 283 meshes with the rack 305 of the slide lever 302. The elevating member 285 has a cylindrical portion 286 fitted into the helical cam member 281, a cam follower 287 fitted into the helical cam groove 282, and a U groove portion 288 at one end is attached to the stopper member 307 implanted in the chassis base. It is fitted and locked. A loading member lifting / lowering stage 289 is integrally attached to the lifting / lowering member 285 by a pressing force of a leaf spring, which will be described later, and a loading member 400 that supports the poles P5 (8) and P8 is placed on the stage 289. (See FIGS. 30 and 31).

  When the slide lever 302 is slid in the X1 direction, as shown in FIG. 31, the spiral cam member 281 is rotated clockwise by the rack 305, the cam follower 287 is guided by the spiral cam groove 282, and the elevating member 285 is moved. Moved in the Z1 direction, the poles P5 (8), P8 are lifted together with the loading member lifting / lowering stage 289. The raising of the poles P5 (8), P8 is performed without any trouble while moving one end of the links 340, 341 in FIG.

  The pole lifting mechanism 290 has substantially the same configuration as the pole lifting mechanism 280 described above, and includes a spiral cam member 291 and a lifting member 295 as shown in FIG. The spiral cam member 291 is fitted and supported by a stopper member 307 implanted in the chassis base, and the gear 293 is engaged with the rack 306. The stopper member 307 includes a shaft 307 a that is implanted in the chassis and inserted through the U groove portion 288, and a flange portion 307 b that is provided at the upper end of the shaft 307 a and has a larger diameter than the U groove portion 288. The flange portion 307b functions as a restricting portion that restricts the position when the elevating member 295 is raised.

  The elevating member 295 has a cylindrical portion 296 fitted into the helical cam member 291, a cam follower 297 fitted into the helical cam groove 292, and a U groove portion 298 at one end is attached to the stopper member 308 implanted in the chassis base. It is fitted and locked. A stage 289 is attached to the elevating member 295 so as to be movable up and down, and arms 183 and 184 are supported on the loading member elevating stage 289. At the upper end of the stopper member 308, a flange portion 308a having a diameter larger than that of the U groove portion 298 is provided. The flange portion 308a functions as a restricting portion that restricts the position when the elevating member 295 is raised.

  When the slide lever 302 is slid in the X1 direction, the spiral cam member 291 is rotated counterclockwise by the rack 306 and the cam follower 297 is guided by the spiral cam groove 292 as shown in FIG. The stage 299 is moved in the Z1 direction, the arms 183 and 184 are pushed up by the stage 299, the sleeve 185 is slid along the fixed post 187 in the Z1 direction, and the pole P9 is lifted together with the arms 183 and 184.

  When the second drive gear 220 is turned counterclockwise and returned from the turned position, the mechanism is returned from the state shown in FIG. 31 to the initial state shown in FIG.

[Pole P5 (8), P8 move, Pole P4 (8) move operation 133 delayed] (See FIGS. 34 and 35)
FIG. 34 shows an initial state, and FIG. 35 shows a state where the poles P5 (8), P8, and P4 (8) have finished moving.

  Reference numeral 310 denotes a ring assembly which is supported on the chassis base and supported on the chassis base, and is arranged at a position surrounding the rotary drum device 31 on the plan view. The ring assembly 310 includes a first ring member 311 and a second ring member 312 that are overlapped with each other and combined with an arc-shaped hole and a pin. The ring assembly 310 rotates relatively within a predetermined angle range. It is possible to move, and it is moved in one direction by a tension spring 313 and integrated. A gear portion 314 is formed in the first ring member 311 within a predetermined angle range. The gear portion 235a of the third drive gear 230 and the gear portion 314 of the ring assembly 310 are engaged with each other.

  A sector gear 320 has a gear portion 321 and is supported by a fixed post 322 on the chassis base and arranged on the X2 side of the ring assembly 310. There is a protrusion 325 at the end of the gear portion 321.

  Reference numeral 330 denotes a slide plate that can slide in the Y1 direction. A pin 324 at the tip of the arm portion 323 of the sector gear 320 is engaged with the long hole 331 of the slide plate 330.

  The pole P5 (8) is connected to the first ring member 311 via a link 340. The pole P8 is connected to the second ring member 312 via a link 341. The rotating arm 343 is supported by a fixed post 343 on the chassis base. The pole P4 (8) is connected to the tip of the rotating arm 343 via a link 345. A pin 346 provided in the middle of the rotating arm 343 is fitted into the substantially U-shaped notch 332 of the slide plate 330.

  When the third drive gear 230 is rotated clockwise by the individual mode switch gear 200, the ring assembly 310 is rotated counterclockwise by the meshing of the gear portion 235a and the gear portion 314, and the pole P5 (8 ) And the pole P8 starts moving. When the poles P5 (8) and P8 are moved halfway, the projection 325 is pushed by the projection of the ring assembly 310, and the sector gear 320 is initially rotated clockwise, and then the gear 314 is Engaging with the gear portion 321, the sector gear 320 is rotated clockwise, the slide plate 330 is slid in the Y1 direction, the rotation arm 343 is rotated counterclockwise, the link 345 is pushed, and the pole P4 (8 ) Will start moving after a delay.

  As shown in FIG. 35, the pole P5 (8), the pole P8, and the pole P4 (8) are moved to the final positions where they hit the stoppers 152, 153, 151, respectively. At this stage, further rotation of the first ring member 311 in the counterclockwise direction becomes impossible, and the gear portion 235a and the gear portion 314 are engaged with each other, so that the upper drive gear of the third drive gear 230 is engaged. 235 cannot be rotated any further. Thereafter, the rotation of the individual mode switch gear 200 continues for a while, and only the lower drive gear 236 of the third drive gear 230 is rotated clockwise while twisting the torsion coil spring 237. When the rotation of the individual mode switch gear 200 is stopped, the strong spring force of the torsion coil spring 237 acts on the ring assembly 310 and the sector gear 320 via the upper drive gear 235, and the ring assembly 310 is counteracted. The pole P5 (8) is urged against the stopper 152, the sector gear 320 is urged clockwise, and the pole P4 (8) is urged against the stopper 151. It is in a state of being strongly pressed against. The pole P8 is pressed against the stopper 153 by the tension spring 313 in the ring assembly 310.

  When the third drive gear 230 is rotated counterclockwise from the rotated position and returned, the mechanism is returned from the state shown in FIG. 35 to the initial state shown in FIG.

  The common mode is determined independently by the common mode switch gear 171 and the individual mode is determined by the individual mode switch gear 200. Therefore, the order of the common mode and the individual mode can be easily changed by software.

  Here, the structure of the pole raising / lowering mechanism 280 which comprises the principal part of this invention is further demonstrated. FIG. 36 is an exploded perspective view showing the configuration of the pole lifting mechanism 280. FIGS. 37A and 37B are diagrams for explaining an assembling procedure of the pole lifting mechanism 280. FIG. 37A is a perspective view showing a state before the leaf spring is assembled, and FIG. 37B is a perspective view showing a state after the leaf spring is assembled. is there.

  As shown in FIG. 36, the pole elevating mechanism 280 includes a spiral cam member 281, an elevating member 285, a loading member elevating stage 289, and a leaf spring 420. The elevating member 285 has a U-groove portion 288 that protrudes rearward from the above-described cylinder portion 286, and an engaging portion 285a that includes a groove (narrow portion) formed on the outer periphery. The loading member elevating stage 289 includes a notch 289a with which the elevating member 285 is engaged, and U-shaped support portions 289b and 289c that support the tape loading member 400 of the poles P5 (8) and P8.

  The leaf spring 420 includes a pair of arm portions 420a engaged with the elevating member 285, a pressing portion 420b formed to extend on the front side of the elevating member 285 and pressing the lower surface of the loading member elevating stage 289 upward, and a pair of arms. There is a stepped portion 420c connecting the portion 420a and the pressing portion 420b. The leaf spring 420 is configured such that when a pressing load is applied to the pressing portion 420b, the stepped portion 420c is elastically deformed to give a resilient force (pressing force). The pair of arm portions 420a has a bent portion 420d bent into a crank shape, and holds the elevating member 285 and the loading member elevating stage 289 by the pressing force of the bent portion 420d.

  As described above, the spiral cam member 281 has the spiral cam groove 282 around the cylindrical portion and the gear 283 at the lower end.

  As shown in FIG. 37A, the engaging portion 285a of the elevating member 285 is fitted into the notch 289a of the loading member elevating stage 289 from the left direction. Thereafter, as shown in FIG. 37 (B), the pair of arm portions 420a of the leaf spring 420 is engaged with the engaging portion 285a of the elevating member 285 from the right direction. As a result, the elevating member 285 and the loading member elevating stage 289 are integrated by the pressing force of the pair of arm portions 420a of the leaf spring 420 and are held so as not to drop off. Accordingly, the elevating member 285, the loading member elevating stage 289, and the leaf spring 420 can be integrated without using a fastening member such as a screw, and thus can be easily assembled in a short time. . Also, when disassembling for maintenance, it is possible to disassemble by pulling the leaf spring 420 in the right direction, so that maintenance work can be performed efficiently.

  FIG. 38 is a longitudinal sectional view of the pole lifting mechanism 280 viewed from the side. As shown in FIG. 38, a loading member elevating stage 289 is fitted to the elevating member 285 so as to be movable up and down and pressed upward by a leaf spring 420 as a pressing member. The spiral cam member 281 is rotatably supported by a shaft 432 that stands on the upper surface of the chassis 430, and is prevented from being pulled upward by a retaining ring 434 that is locked to the upper end of the shaft 432.

  In addition, above the loading member elevating stage 289, the sub chassis 440 is supported above the chassis 430. The sub-chassis 440 is horizontally mounted at a predetermined height above the chassis 430, and has a loading guide 400 that moves the tape loading member from the vicinity of the tape cassette mounting portion to the vicinity of the rotary drum device 31, as will be described later. .

  The elevating member 285 includes an engaging portion 285a that holds the loading member elevating stage 289 on which the tape loading member 400 is placed, a holding portion 285b that holds a leaf spring 420 that presses the loading member elevating stage 289 upward, and loading. It has a contact portion 285 c that contacts the upper surface of the member elevating stage 289 and a holding portion 285 d that holds the leaf spring 420.

  The elevating member 285 is configured to move up and down by the rotational movement of the helical cam member 281, but the helical cam groove 282 of the helical cam member 281 is higher than the height position of the sub chassis 440 with respect to the chassis 310. The upward movement stroke is long. This overstroke acts as a stroke for pressing the loading member elevating stage 289 against the lower surface of the subchassis 440.

  Further, as shown in FIG. 32, the elevating member 285 has a cylindrical portion 286 that fits into the spiral cam member 281 and a cam follower 287 that fits into the spiral cam groove 282, so that the spiral cam groove 282 rotates. To go up and down. At that time, the elevating member 285 is prevented from rotating by fitting a U-shaped groove portion 288 at the rear end into a stopper member 307 implanted in the chassis base 430.

  Here, the raising operation of the pole lifting mechanism 280 having the above-described configuration will be described. FIG. 39 is a perspective view showing a lowered state of the pole lifting mechanism 280. FIG. As shown in FIG. 39, the poles P5 (8), P8 are held in a state of protruding upward from the openings 440a, 440b of the subchassis 440. At this time, the elevating member 285 is lowered, and the tape loading member 400 is also located below the sub chassis 440.

  When the tape cassette 20 having a wide tape width is mounted on the tape cassette mounting portion, the slide lever 302 is slid as shown in FIG. 30 and FIG. 31 described above, so that the spiral cam member 281 is rotated clockwise by the rack 305. , The cam follower 287 is guided by the spiral cam groove 282, the elevating member 285 is moved up, and the loading member having the poles P5 (8), P8 is raised together with the loading member elevating stage 289. The spiral cam member 291 rotates and the elevating member 285 moves up.

  As a result, the loading member elevating stage 289 comes into contact with the lower surface of the subchassis 440 as shown in FIG. In this state, since the leaf spring 420 is not elastically deformed, the loading member elevating stage 289 is not pressed.

  Further, when the spiral cam member 291 rotates and the lifting member 285 moves upward, as shown in FIG. 41, the contact portion 285c of the lifting member 285 moves upward from the loading member lifting stage 289, and the loading member The arm portion 420a of the leaf spring 420 is pressed upward by the holding portion 285d of the elevating member 285 and elastically deformed while the elevating stage 289 is in contact with the lower surface of the sub chassis 440. By this raising operation, the stepped portion 420c of the leaf spring 420 is relatively elastically deformed to apply a pressing force to the outer pressing portion 420b. Therefore, the leaf spring 420 presses the loading member lifting stage 289 upward. As a result, the front end of the loading member elevating stage 289 is pressed and held in close contact with the lower surface of the subchassis 440.

  The U groove portion 288 provided on the rear end side of the elevating member 285 comes into contact with the flange portion 307 b protruding from the upper end of the stopper member 307. Therefore, the loading member elevating stage 289 is pressed and held in a state where the front end is in close contact with the lower surface of the subchassis 440 by the pressing force of the leaf spring 420 and the rear end is in contact with the flange portion 307b of the stopper member 307. It is held by the lift member 285 that is pressed and held. As a result, the loading member elevating stage 289 is positioned in a horizontal state, and as shown in FIG. 42, the loading member elevating stage 289 is held in a state where there is no step with the inclined surface 412 of the loading guide 410 provided in the subchassis 440. The

  As shown in FIG. 43, the loading member 400 having the poles P5 (8) and P8 raised by the loading member elevating stage 289 by the subsequent loading operation starts smoothly on the inclined surface 412 of the loading guide 410. After that, the magnetic tape can be moved along the loading guide 410 and moved to a position where the magnetic tape is wound around the rotary drum device 31 as shown in FIGS.

  In addition, since the stopper member 307 has a large-diameter flange 307b at the upper end, only the front end of the loading member elevating stage 289 is in contact with the lower surface of the subchassis 440, and the U groove portion on the rear end side of the elevating member 285 This prevents the 288 from slipping upward from the stopper member 307 and becoming inclined.

  FIG. 44 is a longitudinal sectional view showing a first modification of the pole lifting mechanism 280. As shown in FIG. 44, the stopper member 307 of Modification 1 includes a shaft 307a fixed on the chassis 430, a screw hole 307c provided at the upper end of the shaft 307a, and a height screwed into the screw hole 307c. And a height adjusting screw 450. Since the height adjusting screw 450 has a head having a diameter larger than that of the shaft 307a, the height adjusting screw 450 functions as a restricting portion that restricts the raised position of the U-groove portion 288.

  When the height adjusting screw 450 is rotated, the height adjusting screw 450 moves up and down with respect to the screw hole 307c and can adjust the contact position with the rear end side (the upper surface of the U groove portion 288) of the elevating member 285. . Therefore, even when the raising / lowering position of the elevating member 285 is shifted due to a dimensional error or the like, it is possible to prevent the inclination when the elevating member 285 is moved upward by adjusting the screwing position of the height adjusting screw 450.

  FIG. 45 is a longitudinal sectional view showing a second modification of the pole lifting mechanism 280. As shown in FIG. 45, the height adjusting spacer 460 is fitted to the stopper member 307 of the first modification. A plurality of types of height adjusting spacers 460 having different thickness dimensions are prepared in advance, and an elevating member 285 is provided by interposing an arbitrary thickness below the flange portion 307b of the stopper member 307. It is possible to adjust the contact position with the rear end side (the upper surface of the U groove 288). Therefore, even when the raising / lowering position of the elevating / lowering member 285 is shifted due to a dimensional error or the like, it is possible to prevent the tilt when the elevating / lowering member 285 is moved upward by adjusting the thickness of the height adjusting spacer 460.

  The present invention is also applicable to a recording / reproducing apparatus using a magnetic tape other than the streamer apparatus.

It is a perspective view which shows the streamer apparatus which becomes Example 1 of this invention together with the present cassette and a new type cassette. It is a top view of the streamer apparatus of FIG. It is a figure explaining progress of the tape loading operation | movement of a streamer apparatus when the present tape cassette is mounted | worn. It is a figure explaining progress of the tape loading operation | movement of a streamer apparatus when a new type tape cassette is mounted | worn. It is a figure which shows the tape loading completion state from the present tape cassette. It is a figure which shows the tape loading completion state from a new tape cassette. It is a figure which shows the winding state to the rotating drum apparatus of a 4 mm width magnetic tape and an 8 mm width magnetic tape, and the track pattern on each magnetic tape. It is a top view in the state where the current tape cassette was loaded. It is a top view in the state where operation 121 in Drawing 3 was completed. FIG. 4 is a plan view showing a state in which an operation 122 in FIG. 3 is completed. It is a top view in the state where operation 123 in FIG. 3 was completed. It is a top view in the state where a new type tape cassette was loaded. It is a top view in the state where operation 131 in Drawing 4 was completed. It is a top view in the state where operation 132 in Drawing 4 was completed. It is a top view of the state in the middle of the operation | movement 133 in FIG. It is a top view of the state in the middle of the operation | movement 133 in FIG. It is a top view in the state where operation 133 in Drawing 4 was completed. FIG. 5 is a plan view showing a state in which an operation 134 in FIG. 4 is completed. It is a perspective view which shows a 1st power transmission mechanism seeing from the downward direction. It is a perspective view which shows the pole moving mechanism in the initial state of the poles P1 and P9. It is a perspective view which shows the state which pole P1, P9 moved. It is a perspective view of the 2nd transmission mechanism. It is a perspective view which shows a 2nd power transmission mechanism seeing from the downward direction. It is a top view of the 2nd transmission mechanism. It is a figure which shows the operation | movement by which rotation is transmitted to the 1st drive gear when an individual mode switch gear is rotated clockwise. It is a figure which shows the operation | movement by which rotation is transmitted to the 2nd drive gear when an individual mode switch gear rotates counterclockwise. It is a figure which shows the operation | movement by which an individual mode switch gear is further rotated counterclockwise, and rotation is transmitted to a 3rd drive gear. It is a perspective view which shows the pole moving mechanism in the initial state of pole P4 (4) and P5 (4). It is a perspective view which shows the state which pole P4 (4) and P5 (4) moved. It is a perspective view which shows the pole raising / lowering mechanism in the initial state of pole P1, P5 (8), P8, P9. It is a perspective view which shows the state which pole P1, P5 (8), P8, P9 raised. It is a figure which expands and shows the raising / lowering mechanism for poles P5 (8) and P8 in FIG. It is a figure which expands and shows the raising / lowering mechanism for pole P9 in FIG. It is a perspective view which shows the pole moving mechanism in the initial state of pole P5 (8), P8, P4 (8). It is a perspective view which shows the state which pole P5 (8), P8, P4 (8) moved. 5 is an exploded perspective view showing a configuration of a pole lifting mechanism 280. FIG. It is a figure for demonstrating the assembly operation procedure of the pole raising / lowering mechanism 280, (A) is a perspective view which shows the state before a leaf | plate spring assembly | attachment, (B) is a perspective view which shows the state after a leaf | plate spring assembly | attachment. It is the longitudinal cross-sectional view which looked at the pole raising / lowering mechanism 280 from the side. It is a perspective view which shows the fall state of the pole raising / lowering mechanism 280. FIG. It is a longitudinal cross-sectional view which shows the raising operation | movement of the pole raising / lowering mechanism 280. FIG. It is a longitudinal cross-sectional view which shows the raising operation completion state of the pole raising / lowering mechanism 280. It is a perspective view which shows the raising operation completion state of the pole raising / lowering mechanism 280. It is a longitudinal cross-sectional view which shows the operation state which the loading member moved. It is a longitudinal cross-sectional view which shows the modification 1 of the pole raising / lowering mechanism 280. FIG. It is a longitudinal cross-sectional view which shows the modification 2 of the pole raising / lowering mechanism 280.

Explanation of symbols

P0 to P9 Loading pole 10 Current tape cassette 14 4 mm wide magnetic tape 20 New tape cassette 24 8 mm wide magnetic tape 29 Recess 30 Streamer device 31 Rotating drum device 40 Common operation motor 50 First transmission mechanism 60 Individual operation motor 70 Second transmission mechanism 80 Motor drive circuit for common operation 81 Motor drive circuit for individual operation 82 Control circuit 90 Capstan 100 Pinch roller 110 Head cleaner 120 Current tape cassette recognition operation 121 Pole P1, P9 movement operation 122 Pole P4 (4) , P5 (4) moving operation 123 Pinch roller moving operation 124 Head cleaner moving operation 130 New tape cassette recognition operation 131 Pole P1, P5 (8), P8, P9 ascending operation 132 Pole P1, P9 moving operation 133 P5 (8), P8, P4 (8) moving operation 134 Pinch roller moving operation 135 Head cleaner moving operation 160, 161 Track pattern 170 Operation state detection substrate 171 Common mode switch gear 175 Drive gear 200 Individual mode switch gear 210 First drive gear 220 Second drive gear 230 Third drive gear 240 Operation state detection substrate 270, 280, 290 Pole lifting mechanism 281 Spiral cam member 282 Spiral cam groove 285 Lifting member 287 Cam follower 288 U groove 289 Loading member Lifting stage 307 Stopper member 400 Loading guide 410 Loading guide 412 Inclined surface 420 Leaf spring 430 Chassis 440 Subchassis 450 Height adjusting screw 460 Height adjusting spacer

Claims (4)

A rotating drum device provided on a chassis and having a magnetic head for reproducing magnetic recording on the magnetic tape or data recorded on the magnetic tape;
A tape loading member that pulls out the magnetic tape from a tape cassette and winds the magnetic tape around the rotating drum device;
A loading guide which is supported above the chassis and moves the tape loading member from the vicinity of the tape cassette mounting portion to the vicinity of the rotary drum device;
An elevating mechanism for elevating the tape loading member according to the type of the tape cassette mounted;
With
The lifting mechanism is
An elevating member for elevating the tape loading member;
A cam member that is rotatably supported by a shaft standing on the chassis, and that lifts and lowers the elevating member in accordance with a rotating operation;
A stopper member that stands on the chassis and is inserted into the elevating member and restricts the rotation of the elevating member;
A restricting portion for restricting the upward movement position of the elevating member at the upper end of the stopper member;
A magnetic recording / reproducing apparatus comprising: The lifting member is
An engaging portion that engages a loading member lifting stage that supports the tape loading member;
A holding portion that holds a pressing member that presses the loading member lifting stage upward;
The magnetic recording / reproducing apparatus according to claim 1, comprising: The magnetic recording / reproducing apparatus according to claim 2, wherein the pressing member is formed of a leaf spring and presses the loading member lifting stage against a lower surface of the loading guide.   The magnetic recording / reproducing apparatus according to claim 1, wherein a height position of the restricting portion is adjustable.

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