JP3048795B2 - Method of controlling magnetic recording / reproducing apparatus and apparatus therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a magnetic recording / reproducing apparatus, such as an 8 mm video apparatus, for accommodating a magnetic tape in a cassette without causing damage to the magnetic tape when a running abnormality occurs. And its device.

[0002]

2. Description of the Related Art Among magnetic recording / reproducing apparatuses, there is a so-called 8-mm video as an apparatus using a magnetic tape. This 8
In millimeter video, a cassette case with a magnetic tape wound thereon can be stored and held in a slide chassis, and this slide chassis is ejected from the main body by a lifting mechanism built in the video main body to eject the cassette case. You can move to the position. The slide chassis can be moved to a play position by a slide mechanism in the video main body. At this play position, the magnetic tape in the cassette case can be pulled out and run to perform recording or reproduction. ing.

An example of such an 8 mm video magnetic recording / reproducing apparatus is disclosed in Japanese Patent Application Laid-Open No. 2-62748. FIG. 14 is a plan view showing a conventional magnetic recording / reproducing apparatus.

[0004] As shown in FIG.
Reference numeral 01 is slidably supported by a drive mechanism (not shown) with respect to a base chassis 302 attached to the apparatus main body. A rotary head drum 303 is provided at the center of the base chassis 302, and a loading mechanism for pulling out the magnetic tape 304 from the cassette case and winding the magnetic tape 304 around the rotary head drum 303 is mounted adjacent to the rotary head drum 303. ing. That is, a pair of guide posts 30 is provided on both sides of the rotary head drum 303.
The guide posts 305 and 306 pull out the magnetic tape 304 in the cassette case and move the rotary head drum 30 as the slide chassis 301 moves to the playback or recording position.
3 can be wound at a predetermined angle.

[0005] The apparatus main body is provided with a tape running mechanism for running the magnetic tape 304 drawn out of the cassette at a predetermined speed. That is, the base chassis 3
02 is provided with a capstan (shaft) 307 that is rotatably driven by a motor (not shown). On the other hand, a pinch arm 309 having a pinch roller 308 is rotatably supported on the slide chassis 301. The pinch arm 309 rotates as the slide chassis 301 moves to a playback or recording position, and The roller 308 applies the capstan (axis) 307 to the magnetic tape 304.
It can be crimped on.

In the drawings, reference numeral 310 denotes a magnetic tape 304.
Tension lever for applying a predetermined tension to the
Reference numeral 12 denotes a turntable on the supply reel side and a turntable on the take-up reel side, which are rotatably provided on the slide chassis 301.

When the slide chassis 301 moves in an 8 mm video, the guide posts 305, 3
06 moves in conjunction with it, pulls out the magnetic tape 304 in the cassette case from the supply reel, and rotates the rotary head drum 30.
3 is wound at a predetermined angle. With this operation, the pinch arm 309 rotates clockwise in the figure, and the pinch roller 308 moves the magnetic tape 304 to the capstan 30.
7 is crimped. Further, the tension lever 310 rotates counterclockwise with the pinch arm 309 to apply a predetermined tension to the magnetic tape 304. Therefore, when the recording or reproduction switch is turned on in this state, the magnetic tape 304 runs and recording or reproduction is performed.

In the above-mentioned 8-mm video, the magnetic tape 304 is running (e.g., when a charging phenomenon occurs due to friction between the magnetic tapes 304 or when condensation forms on the rotary head drum 303). During recording or playback), it may be stuck to the outer peripheral surface of the rotary head drum 303. Then, the magnetic tape 304 is wound around the rotary head drum 303, so that not only a normal recording or reproducing operation cannot be performed, but also the magnetic tape 304 is damaged. for that reason,
Conventionally, the magnetic tape 30
When the sticking of No. 4 occurs, this is detected at an early stage, the magnetic tape 304 is returned into the cassette case, taken out of the video main body, and a predetermined treatment (for example, drying of the video main body in case of condensation) is performed. Had been given. That is, the pinch roller 3
08, the rotation of the rotary head drum 303 is stopped, and the running of the magnetic tape 304 is stopped.
The tape loading is released by retracting the slide chassis 301 and the turntable 31 on the supply reel side.
The magnetic tape 304 is returned into the cassette case by rotating the magnetic tape 304 in the reverse rotation direction (the arrow indicated by the dotted line in FIG. 14). Then, remove the cassette case from the video main body.

[0009]

In the above-mentioned 8 mm video, the magnetic tape 30 is attached to the rotating head drum 303.
4 is adhered, the magnetic tape 3 pulled out by rotating the turntable 311 on the supply reel side in the reverse direction.
04 was rewound and housed in the cassette case. Incidentally, the state in which the magnetic tape 304 is stuck to the rotary head drum 303 is a state in which the magnetic tape 304a is wound around substantially the entire circumference of the rotary head drum 303 as shown by a dotted line in FIG. Therefore, turntable 3
When the magnetic tape 304 attached to the rotary head drum 303 is peeled off and rewound by reversing the rotation of the magnetic tape 304, the magnetic tape 304 may be damaged due to a load, or when the magnetic tape 304 has a large adhesive force. However, the magnetic tape 304 may not be accommodated in the cassette case, and the magnetic tape 304 may be damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a control method of a magnetic recording / reproducing apparatus which can accommodate the magnetic tape without damaging it when the magnetic tape is running abnormally, and an apparatus therefor. The purpose is to provide.

[0011]

Means for Solving the Problems A control method of a magnetic recording and reproducing apparatus of the present invention for achieving the above object, the times and the rolling head drum and its driving mechanism, the rotary pull out the magnetic tape from within the cassette A tape loading mechanism for winding around a head drum, a tape running mechanism for running a magnetic tape by pressing a pinch roller against a capstan, and a magnetic tape pulled out by the tape loading mechanism for winding on a supply side or winding side reel A tape take-up mechanism housed in the cassette, and when an abnormality in the running state of the running magnetic tape is detected, the operation of the tape running mechanism is released, and then the tape loading mechanism is released to release the tape. Activating the take-up mechanism and driving the rotary head drum by the drive mechanism to the supply side or take-up. It is characterized in that it has to rotate in the tape take-up direction of the reel.

[0012] The control device of a magnetic recording and reproducing apparatus of the present invention, a rotary head drum and its driving mechanism, a tape loading mechanism for winding said rotary head drum is pulled out of the magnetic tape from within the cassette, the pinch roller A tape running mechanism for pressing the capstan against the magnetic tape and running the magnetic tape, and a tape winding mechanism for winding the magnetic tape pulled out by the tape loading mechanism on a supply side or winding side reel and housing the magnetic tape in the cassette. Running state abnormality detecting means for detecting an abnormality in the running state of the magnetic tape; and releasing the tape loading mechanism after releasing the operation of the tape running mechanism based on the detection result of the running state detecting means, thereby releasing the tape. Activating the winding mechanism and moving the rotary head drum by the drive mechanism to the supply side Rui is characterized in that and control means for rotating the tape take-up direction to the take-up reel.

[0013]

When the magnetic tape adheres to the outer peripheral surface of the rotary head drum during running and an abnormality occurs in the running state, that is, in the running path or the running speed, first, the operation of the tape running mechanism is released to release the magnetic tape. Stop running. Next, release the tape loading mechanism, activate the tape winding means, and rotate the rotary head drum in the tape winding direction to the supply side or the winding side reel by the driving mechanism, and then move the magnetic tape to the winding side reel. Take up.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a control block diagram of an 8 mm video control device for implementing a control method of a magnetic recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart of the control, and FIG. 4 is a plan view of a slide chassis showing an ejected state, FIG. 4 is a plan view of a slide chassis showing a loading state, FIG. 5 is a plan view of a slide chassis showing a tape running state, and FIG. 6 is a base showing an ejected state in 8 mm video. 7, a plan view of a base chassis showing a loading state, FIG. 8 a plan view of a base chassis showing a tape running state, FIG. 9 a plan view of a loading mechanism, FIG. 10 a perspective view of a cassette holder, 11 is a right side view of the cassette holder, FIG. 12 is a left side view of the cassette holder, FIG.
FIG. 3 shows a plan view of the slide chassis showing the state of sticking of the magnetic tape.

In this embodiment, an explanation will be given using an 8 mm video as a magnetic recording / reproducing apparatus. The cassette holder can be protruded outward from the video main body by the elevating mechanism, and the 8 mm video can be slid to the play position with respect to the base chassis of the video main body by being supported by the slide chassis. . In this embodiment, the front or the front is the side where the cassette case is inserted into the cassette holder, and the rear or the rear is the opposite.

First, the cassette holder and its elevating mechanism will be described with reference to FIGS.
In FIGS. 10 to 12, various members relating to driving of the magnetic tape mounted on the slide chassis are omitted.

As shown in FIGS. 10 to 12, the magnetic tape 1 is housed in a box-shaped cassette case 2 wound around a supply reel 3 and a take-up reel 4. And
The magnetic tape 1 is exposed by opening the front lid 5 upward, and loading is possible. The cassette holder 11 has a box shape with front and rear openings, and has a front portion (FIG. 10).
The cassette case 2 can be inserted through an opening at the left (in FIG. 10), and a stopper 1 for regulating the position of the inserted cassette case 2 is provided at a rear portion (at the right in FIG. 10).
2 are formed. Further, support portions 13, 1 for supporting the cassette case 2 are provided at lower portions on both sides of the cassette holder 11.
4 are formed. On the other hand, the slide chassis 15 has a box shape with an open top, and the cassette holder 11 is supported by lifting mechanisms 16 and 17 provided on both left and right sides so as to be able to move up and down.

As shown in detail in FIG. 11, the lifting mechanism 16 includes a pair of arms 19 and 20 having an intermediate portion connected in an X-shape by a connecting shaft 18.
0 is the cassette holder 1 by the pivots 21 and 22.
1 and the slide chassis 15, and a rear end portion is connected to the slide chassis 15 and the cassette holder 11 by long holes 23 and 24 and support shafts 25 and 26. A spring 27 is provided between the pair of arms 19 and 20.
Are stretched, and are urged in the direction in which the arms 19 and 20 stand.

As shown in detail in FIG. 12, the other lifting mechanism 17 is composed of a pair of arms 29, 30 having an intermediate portion connected in an X-shape by a connecting shaft 28.
0 is the cassette holder 1 by the pivots 31 and 32.
1 and the slide chassis 15, and the rear end is connected to the slide chassis 15 and the cassette holder 11 by long holes 33 and 34 and support shafts 35 and 36. A spring 37 is provided between the pair of arms 29 and 30.
Are erected, and are urged in the direction in which the arms 29 and 30 stand.

Therefore, the cassette holder 11 can be moved up and down while maintaining a substantially horizontal state by raising and lowering the arms 19 and 20 of the lifting mechanism 16 and the arms 29 and 30 of the lifting mechanism 17. The left and right elevating mechanisms 16 and 17 are operated synchronously at substantially the same speed by a synchronous mechanism. That is, racks 38 and 39 are formed on the arms 20 and 30 of the elevating mechanisms 16 and 17 along the upper rear end thereof, respectively, and the racks 38 and 39 are formed on the side of the cassette holder 11. The meshing pinions 40 and 41 are rotatably mounted, and the pinions 40 and 41 are connected to a connecting rod 42.
Are connected so as to rotate together.

Accordingly, when the arms 20 and 30 are rotated during the horizontal elevating and lowering of the cassette holder 11 by the elevating mechanisms 16 and 17, the pinions 40 and 41 are passed through the racks 38 and 39.
Are respectively rotated, and the pinions 40, 41
Are connected by the connecting rod 42, they rotate in synchronization with each other, and the left and right elevating mechanisms 16 and 17 operate at substantially the same speed, and the cassette holder 11 is twisted or inclined at the time of elevating and lowering. Nothing.
Then, in the elevating mechanisms 16 and 17, the arms 20, 3
0, that is, the side on which the racks 38, 39 are formed, is connected to the cassette holder 11 by the slots 24, 34 and the support shafts 26, 36.
39 is a pinion 40 while sliding and moving with the rotation.
41 is rotated at an increased speed.
The left and right synchronization is assured.

As described above, the left and right lifting mechanisms 1
6 and 17, each arm 19, 20 and arm 2
Springs 27 and 37 are stretched on 9, 30 respectively.
The cassette holder 11 is lifted by the springs 27 and 3.
7, the cassette holder 11 generates an impact or vibration. Therefore, the elevating mechanisms 16 and 17 include the cassette holder 11.
A damper mechanism 43 for reducing shock and vibration at the time of lifting and lowering to operate slowly is provided.

That is, as shown in detail in FIG. 12, in the slide chassis 15, a slide member 45 having a rack 44 formed on the upper part moves back and forth (left and right in FIG. 11) behind the lifting mechanism 17 side. The arm 29 is freely supported and has one end connected to the rear end of the arm 29. A pinion 46 meshing with the rack 44 is rotatably mounted on the side of the slide chassis 15, and an oil damper 47 is mounted on the pinion 46.

Therefore, when the cassette holder 11 is lifted by the lifting mechanism 17, the arms 29, 30 are turned in the direction in which they are erected by the urging force of the spring 37. At this time,
The rear end of the arm 29 moves forward together with the slide member 45, and rotates the pinion 46 via the rack 44 of the slide member 45. The rotation of the pinion 46 becomes gentle by the action of the oil damper 47, and the cassette holder (11) Shock and vibration at the time of ascending and descending can be reduced to operate slowly.

Further, one lifting mechanism 17 has each arm 2
A lock mechanism 48 for holding the cassettes 9 and 30 in a tilted state, that is, the cassette holder 11 in a lowered state, is provided. In the slide chassis 15, a hook 50 is rotatably attached to a side portion on the side of the lifting mechanism 17 by a shaft 49, and is urged in a counterclockwise direction by a spring 51 stretched between the slide chassis 15 and the hook 50. . Further, a regulating plate 53 is rotatably mounted by a shaft 52 adjacent to the hook 50, is urged in a counterclockwise direction by a spring 54, and has a distal end portion of the hook 50.
, The hook 50 is rotated against the urging force of the spring 51 and held at the release position. On the other hand, a downwardly extending portion is formed integrally with the arm 30, and a locking pin 55 is fixed to this extending portion. Further, a projection 56 is integrally formed at a lower portion of the hook 50, and a release lever 105 is formed on a base chassis 71, which will be described later, which slidably supports the slide chassis 15.

Therefore, the cassette holder 1 shown in FIG.
When 1 is lowered from the raised position (the arms 29 and 30 are raised), the arms 29 and 30 are tilted and the locking pin 55 is lowered. Then, the locking pin 55 is
3, the hook 50 is pressed down against the urging force of the spring 54, and the hook 50 held at the release position by the restricting plate 53 is rotated counterclockwise by the urging force of the spring 51. Therefore, the hook 50 is engaged with the locking pin 55 to prevent the arm 30 from rising, and the cassette holder 11 is restrained at the lowered position (the arms 29 and 30 are inclined). On the other hand, the release lever 1 of the base chassis 71
When the protruding portion 56 of the hook 50 comes into contact with the hook 05, the hook 50 rotates counterclockwise against the urging force of the spring 51 and the engagement with the locking pin 55 is released. Then, the arms 29 and 30 are erected by the urging force of the spring 37, and the cassette holder 11 is raised.

In FIGS. 11 and 12, 57,
Reference numeral 58 denotes each arm 19, 20 of the lifting mechanism 16, 17.
And 29, 30 in the tilted state, ie, the cassette holder 1
1 is a detection switch for detecting a falling state of the switch 1.

As shown in FIG. 10, the cassette holder 11 of this embodiment is provided with a tape protector 61. Cassette holder 11 (cassette case 2)
The lid 5 of the cassette case 2 is opened with this movement when the magnetic tape 1 descends. At this time, the magnetic tape 1
In this case, the magnetic tape 1 rides on the rotating head drum and is carried to the opposite side, and is not properly loaded. The tape protector 61 prevents the magnetic tape 1 from running on the rotating head drum.

That is, an operating member 66 is rotatably supported by the lifting mechanism 17 at the rear of the cassette holder 11, and the lifting mechanism 1 is moved from the center of the rear of the cassette holder 11.
A base end of a tape protector 61 is rotatably attached to a position shifted by a predetermined amount toward the side 7, and a distal end of an operation member 66 is engaged with the tape protector 61. Therefore, when the cassette holder 11 is at the raised position, the lid 5 of the cassette case 2 is closed, while the tape protector 61 faces downward at a predetermined angle, and the leading end of the tape protector 61 is attached to the base chassis 71. The outer peripheral portion of the rotating head drum 112 is located substantially at the center in the radial direction. When the cassette holder 11 is lowered from this state, the lid 5 of the cassette case 2 is opened by a release mechanism (not shown), and the magnetic tape 1 is exposed. on the other hand,
The arms 29 and 30 of the elevating mechanism 17 are tilted, and the operation member 66 is rotated in conjunction with this operation, and the cassette holder 11 is rotated.
The tape protector 61 is raised and rotated with the lowering of the tape protector 61. The lifting operation of the tape protector 61 is performed later than the opening operation of the lid 5 of the cassette case 2, and
The rise of the tape protector 61 ends immediately before the magnetic tape 1 exposed from the cassette case 2 faces the outer peripheral surface of the rotary head drum 112.

Next, a drive mechanism, a loading mechanism, a magnetic tape running mechanism, and the like of the slide chassis will be described with reference to FIGS. In FIGS. 3 to 8, various members relating to the cassette holder mounted on the slide chassis are omitted.

As shown in FIGS. 3 and 6, the base chassis 71 is fixed in a not-shown 8 mm video main body in the form of a square plate, and has support pins 72, 73, 7 on four sides.
4,75 are erected. On the other hand, slide chassis 1
5 is formed with slide holes 76, 77, 78, 79 along the front-rear direction (vertical direction in FIG. 6) on each side. Then, the support pins 72, 7 of the base chassis 71
Each slide hole 76, 77, 78, 79 of the slide chassis 15 is engaged with 3, 74, 75, so that the slide chassis 15 can move in the front-rear direction with respect to the base chassis 71. .

A drive mechanism for the slide chassis 15 is provided on the base chassis 71. That is, as shown in FIG. 6, a drive motor 81 having a drive gear 80 is mounted on the rear side of the base chassis 71, and the drive gear 80 meshes with an adjacent first connection gear 82. The second connection gear 83 coaxially integrated with the first connection gear 82 meshes with the adjacent third connection gear 84, and the fourth connection gear 85 coaxially integrated with the third connection gear 84 is connected to the adjacent fifth connection gear 86. The fifth connection gear 86 is engaged with the sixth connection gear 87, and the sixth connection gear 87 is engaged with the cam gear 88. A first cam groove 89 is formed on the upper surface of the cam gear 88, while a second cam groove 90 is formed on the lower surface.

The base chassis 71 has a cam gear 8.
A drive arm 91 is disposed at a position adjacent to the drive arm 8, and its base end is rotatably attached by a pivot (support pin) 73, and a connection shaft 92 is fixedly connected to the distal end. on the other hand,
A support bracket 94 having a connection groove 93 is attached to the slide chassis 15, and the connection shaft 92 of the drive arm 91 is engaged with the connection groove 93. And
A cam shaft 95 is fixed to an intermediate portion of the drive arm 91, and the cam shaft 95 is connected to a first cam groove 89 of a cam gear 88.
Is engaged.

Accordingly, when the driving motor 81 is driven, the driving force is transmitted to the driving gear 80 and the first connecting gear 8.
2, transmitted to the second connection gear 83, the third connection gear 84, the fourth connection gear 85, the fifth connection gear 86, the sixth connection gear 87, and the cam gear 88, and the cam gear 88 can be rotated. When the cam gear 88 rotates, the first
Drive arm 91 via cam shaft 93 by cam groove 89 of
Rotates about the pivot 73, and can move the slide chassis 15 along the base chassis 71 via the connection shaft 92 and the connection groove 95 (support bracket 94).

The base chassis 71 has a cam gear 8.
One end of a connection link 96 is rotatably mounted on a pivot 97 at a position adjacent to the drive arm 8 and opposite to the drive arm 91. The connecting link 96 has an L-shape, and a cam shaft 98 is fixedly connected to the other end.
Are engaged with the second cam groove 90 of the cam gear 88. One end of a connecting lever 99 is connected to an intermediate portion of the connecting link 96 by a connecting pin 100.
Is connected to an operating lever 102 by a connecting pin 101. The operating lever 102 has one end of the pivot 10
3 so as to be freely rotatable.
The operation of the pinch roller 159 (pinch arm 161) and the operation of the ratchet brake lever 184 are controlled.

The cam gear 88 has a lock control gear 1.
The lock control gear 104 is engaged with the release lever 105 by cam. Therefore, the release lever 105 can be operated between the release position and the non-release position by the rotation angle of the lock control gear 104, and the release lever 105 comes into contact or non-contact with the protrusion 56 of the hook 50 of the lock mechanism 48 in the cassette holder 11 described above. , Hook 5
0 disengagement can be controlled.

Here, the loading mechanism of the magnetic tape 1 will be described. As shown in FIGS. 3, 6, and 9, intermediate gears 107 and 108 sequentially mesh with the cam gear 88, and further, a first drive gear 109 and a second drive gear 110.
Are engaged. On the other hand, a rotary head drum 112 is mounted on the base chassis 71 at a substantially central portion via a drum base 111. A ring holder 113 is mounted on the base chassis 71 in close contact with the drum base 111, and two first ring gears 114 and a second ring gear 114 are mounted on the lower surface of the ring holder 113.
A ring gear 115 is rotatably supported in a vertically overlapping state.
09, the second ring gear 115 has the second drive gear 110
Are engaged with each other. Although not shown, the cam gear 88 and the intermediate gear 107 are partially missing gears.
The rotation of the cam gear 88, the transmission gear group on the drive source side, and the lock control gear 104 is allowed before and after the loading of the first and second ring gears 114 and 115 is completed.

Accordingly, when the driving motor 81 is driven, the driving force is transmitted to the driving gear 80 and the connecting gears 82, 82.
83, 84, 85, 86, 87, the cam gear 88, the first drive gear 109, and the second drive gear 110, and the first drive gear 109 and the second drive gear 110 rotate in different directions. Then, the first drive gear 109
The first ring gear 114 and the second ring gear 115 meshing with the second drive gear 110 can rotate in mutually different directions.

Drum base 111 and ring holder 11
3, loading guide grooves 116 and 117 are formed at respective lateral (left and right in FIG. 9) positions around the rotary head drum 112.
One of the loading guide grooves 116 has a bifurcated end, and the first guide base 118 has a pair of guide pins 11.
The first guide base 118 has guide rollers 121 and guide posts 122 and 123 movably mounted via the first and second guide bases 9 and 120. Then, the first guide base 118 is moved by the connecting lever 124 to the first guide base 118.
It is connected to a ring gear 114. A guide portion 125 is formed along the loading guide groove 116 on the drum base 111 and the ring holder 113, and a guide pin 126 guided by the guide portion 125 is fixed to the first guide base 118.

The other loading guide groove 117
The second guide base 127 has a pair of guide pins 12
The second guide base 127 is provided with a guide roller 130 and a guide post 131 standing upright. And the second
The guide base 127 is connected to the second ring gear 115 by a connecting lever 132. Note that an impedance roller 133 is mounted on the ring holder 113 adjacent to the loading guide groove 117.

Accordingly, when the first ring gear 114 and the second ring gear 115 rotate in opposite directions, the first ring gear 114 and the second ring gear 115 rotate.
The guide base 118 can move along the loading guide groove 116 by transmitting the driving force via the connecting lever 124. At this time, the guide pin 126
Is guided by the guide portion 125, so that the guide pins 119 and 120 are provided at one end of the loading guide groove 116.
Are distributed to each of the forked grooves. Also, the second
The guide base 127 can move along the loading guide groove 117 by transmitting the driving force via the connecting lever 132.

Next, the magnetic tape traveling mechanism will be described. As shown in FIG. 6, a capstan (shaft) 134 and a capstan gear 1 are provided on the rear side of the base chassis 71.
A capstan motor 136 having a capstan gear 35 is mounted, and the capstan gear 135 is engaged with an adjacent gear pulley 137. On the other hand, the slide chassis 15
A turntable 138 on the supply reel 3 side and a turntable 139 on the take-up reel 4 side are rotatably mounted at predetermined positions. Turntable 138 on supply reel 3 side and turntable 13 on take-up reel 4 side
9 has gear portions 140 and 141 formed on the outer peripheral portion, respectively. A gear pulley 142 is mounted on the base chassis 71 between the turntables 138 and 139, a belt 143 is wound around the gear pulley 137, and a rotating shaft 144 of the gear pulley 142 is mounted.
Penetrates the elongated hole 145 of the slide chassis 15.
Further, a bracket 146 is pivotally mounted on the rotating shaft 144 at an upper portion of the slide chassis 15, and an idle gear 147 meshing with the gear pulley 142 is mounted on the bracket 146. Note that a clutch member (not shown) that generates rotational friction is provided between the bracket 146 and the idle gear 147.

Accordingly, when the capstan motor 136 is driven, the capstan gear 135 is rotated, and the rotational force is generated by the gear pulley 137, the belt 143, and the gear pulley 14.
2, transmitted to the idle gear 147. At this time, if the transmitted torque is a clockwise rotation of the gear pulley 142, the idle gear 147 (bracket 146)
3 is moved rightward about the rotation shaft 144 in FIG. 3 to move the gear portion 14 of the turntable 139 on the take-up reel side.
1 and the turntable 139 can be rotated in the clockwise direction (the feed direction of the magnetic tape 1) via the idle gear 147. If the transmitted torque is a counterclockwise rotation of the gear pulley 142, the idle gear 147 (bracket 146) is moved leftward about the rotation shaft 144 in FIG. Gear section 140 of table 138
And the turntable 138 can be rotated in the counterclockwise direction (rewind direction of the magnetic tape 1) via the idle gear 147. The above-described clutch member generates a moving force of the idle gear 147.

As shown in FIG. 3, the slide chassis 15
A guide roller 148 and a guide post 149 for guiding the magnetic tape 1 during loading are movably provided on one side (the left part in FIG. 3). That is, an intermediate portion of the two links 150 and 151 is rotatably attached to the slide chassis 15 by being pivotally supported by the pivots 152 and 153. One end of each link 150 and 151 is provided with an engagement pin 154. , 155 pass through guide holes 156 and guide grooves 15 formed in base chassis 71.
7, 158, and a guide roller 148 and a guide post 149 are attached to the other end, respectively.

Therefore, when the slide chassis 15 moves rearward (upward in FIG. 3), the engagement pins 154, 15
The movement of the link 5 is regulated by the guide grooves 157 and 158, and the links 150 and 151 rotate counterclockwise, respectively. When the links 150 and 151 rotate by a predetermined amount, the engagement pins 154 and 155 are moved to the respective guide grooves 157,
By moving along 158, each link 150, 15
The guide roller 148 and the guide post 149 provided at the other end of the first unit 1 can move to a predetermined position along a predetermined trajectory.

As shown in FIG. 3, the other side (the right side in FIG. 3) of the slide chassis 15 guides the magnetic tape 1 at the time of loading, and at the same time, moves between the capstan 134 and the running of the magnetic tape 1. A pinch roller 159 for guiding the magnetic tape 1 and a guide roller 160 are movably provided. That is, the slide chassis 1
A pinch arm 161 having a pinch roller 159 mounted on one end thereof is rotatably mounted on a pivot shaft 162, and a support arm 165 integrally mounted with first and second guide pins 163 and 164 is also provided with a pivot shaft 162. It is mounted rotatably. And each arm 1
A spring 166 is stretched between 61 and 165 to bias and hold the pinch arm 161 in the clockwise direction in FIG. 3 and the support arm 165 in the counterclockwise direction in FIG.

The first and second guide pins 163 and 164 of the support arm 165 are connected to the slide chassis 1 respectively.
First and second guide grooves 16 formed in an arc formed on the first and second guide grooves 5
7 and 168, a spring 169 is stretched between a protrusion 165b formed on the support arm 165 and a protrusion 15a formed on the slide chassis 15, and the support arm 165 is opposite to the support arm 165 in FIG. The support arm 165 is urged in the clockwise direction and the first guide pin 16
3 is held at a position where it contacts the end of the first guide groove 167.

On the other hand, on the base chassis 71, a regulating portion 170 for regulating the movement of the second guide pin 164 is formed. As described above, the operating lever 102 is rotatably attached to the base chassis 71 by the pivot 103. The operating lever 102 has an engaging groove 171 with which the first guide groove 167 is engaged. Is formed.

A guide arm 172 is provided on the slide chassis 15 adjacent to the pinch arm 161.
The spring 17
4 urged in the counterclockwise direction in FIG. A guide roller 160 is mounted on the distal end of the guide arm 172.

Therefore, when the slide chassis 15 moves rearward (upward in FIG. 3) from the state shown in FIG. 3, the pinch arm 161 and the support arm 165 are held at their rotational positions by the urging force of the spring 169, and It moves with the chassis 15. When the movement of the second guide pin 164 of the support arm 165 is restricted by the restricting portion 170, the support arm 165 and the pinch arm 161 rotate clockwise, and the first and second guide pins 163, 164 are rotated. Is the guide groove 1
It moves along 67,168.

Support arm 165 (pinch arm 161)
Is rotated by a predetermined amount, as shown in FIG. 4, the second guide pin 164 is disengaged from the restricting portion 170 and its movement is released, the rotation of the support arm 165 and the pinch arm 161 is stopped, and the support arm 165 is stopped. The pinch arm 161 moves together with the slide chassis 15 at the same rotation angle. This support arm 16 accompanying the slide chassis 15
5 and the first guide pin 163 of the support arm 165 at the end of the sliding movement of the pinch arm 161.
02 is fitted in the engagement groove 171. Therefore, at this time, when the operating lever 102 is rotated counterclockwise in FIG. 5 by the second cam groove 90 of the cam gear 88 via the connecting link 96 and the connecting lever 99 as shown in FIG. The cam surface of the mating groove 171 is the first guide pin 1
The support arm 165 and the pinch arm 161 are rotated clockwise by pressing the 63. In this manner, the pinch roller 159 moves along the capstan 134
Can be moved to the position where it abuts.

When the pinch roller 159 moves, the guide arm 172 can also rotate clockwise.

Here, the take-up reel 4 side and the supply reel 3
Various brake mechanisms provided on the side will be described.
As shown in FIG. 3, a ratchet brake 181 that regulates the rotation of the take-up reel 4 in the pull-out direction (counterclockwise in FIG. 3) of the magnetic tape 1 during loading is provided on the take-up reel 4 side. . That is, a ratchet 182 is formed on the outer periphery of the turntable 139 on the take-up reel side, while a ratchet brake lever 184 having a locking claw 183 for locking the ratchet 182 is rotated on the slide chassis 15 by the pivot 185. It is movably mounted and is provided with rotational friction by a biasing member (not shown).

An engagement pin 187 is fixed to the ratchet brake lever 184, while the base chassis 7
1, an operation lever 188 is rotatably supported by a pivot (support pin) 75 at a position adjacent to the ratchet brake lever 184, and the operation lever 188 has an engagement piece 189 which can be engaged with the engagement pin 187. Are integrally formed. The operating lever 188 has an operating pin 19.
The operation groove 191 into which the operation pin 190 is inserted is formed in the operation lever 102 pivotally attached to the base chassis 71 while the base member 71 is fixed. Further, an engagement piece 192 which can be directly engaged with the engagement pin 187 of the ratchet brake lever 184 is formed integrally with the operation lever 102.

Therefore, when the magnetic tape 1 is loaded, the ratchet brake lever 184 causes the locking pawl 183 to be moved by the previous loading and unloading operations so that the ratchet 182 of the turntable 139 on the take-up reel side.
3 in a state where the magnetic tape 1 is pulled out during loading on the take-up reel 4 (FIG. 3).
In the counterclockwise direction). At this time, when the operation lever 102 is rotated counterclockwise about the pivot 103, the operation lever 188 rotates clockwise in FIG. 3 via the operation groove 191 and the operation pin 190. Then, the engaging piece 189 becomes the engaging pin 1
By pressing the ratchet brake lever 184 in the counterclockwise direction in FIG.
Of the turntable 139 is released, and the take-up reel 4 is rotatable in the direction in which the magnetic tape 1 is pulled out.

After the loading is completed, when the operating lever 102 is rotated counterclockwise about the pivot 103, the engaging piece 192 is engaged with the engaging pin 1 in the same manner as described above.
When the ratchet brake lever 184 is rotated by pressing 87, the restraint of the turntable 139 is released, and the take-up reel 4 becomes rotatable.

On the other hand, as shown in FIG. 3, on the supply reel 3 side, a soft brake 193 for restricting rotation of the magnetic tape supply reel 3 in the magnetic tape supply direction due to inertial force during loading of the magnetic tape 1, and loading completion. A ratchet brake 194 is also provided, which similarly regulates rotation in the magnetic tape supply direction. That is, a band brake 195 is set around the outer periphery of the turntable 138 on the supply reel side.
One end of the slide chassis 15 is supported by the support member 196.
, While the other end is connected to a link 150. The soft brake lever 197 is rotatably attached to the slide chassis 15 by a pivot 198, and a pressure contact member 199 that presses against the outer peripheral portion of the turntable 138 is mounted at the tip of the soft brake lever 197.

On the other hand, the ratchet brake lever 200 is also rotatably mounted on the slide chassis 15 by a pivot 198, and has a locking claw 201 integrally formed at the distal end thereof for locking with the gear portion 140 of the turntable 138. ing. And the soft brake lever 19
7 and the ratchet brake lever 200, a spring 202 is stretched, and the soft brake lever 197 is turned clockwise in FIG. 3, that is, in a direction in which the pressing member 199 presses against the outer peripheral portion of the turntable 138. The ratchet brake lever 200 is turned in the counterclockwise direction, that is, the locking claw 201 is
It is urged in the direction of locking to zero.

The soft brake lever 197 and the ratchet brake lever 200 have the cam pins 2 respectively.
03 and 204 are fixed. On the other hand, the drive arm 91
A cam surface 205 is formed as a control unit for controlling the operation of the levers 197 and 200, and a cam groove 206 for controlling the operation of the lever 200 is formed in the cam gear 88. In this case, as described above, the drive arm 91 is shared with the support pin 73 as a first reference axis for positioning the movement direction by inserting the pivot shaft (73) into the slide hole 73 of the slide chassis 15. Therefore, the relative positional accuracy between the two is improved, and the operation timing of the soft brake lever 197 and the ratchet brake lever 200 can be made high in accuracy.

Accordingly, when the magnetic tape 1 is loaded, the soft brake lever 197 is urged clockwise by the urging force of the spring 202, so that the pressure contact member 199 presses against the turntable 138 on the supply reel side, and the magnetic tape The rotation of the supply reel 3 in the magnetic tape supply direction (clockwise direction in FIG. 3) due to the inertial force is prevented. Further, the ratchet brake lever 200 is held at that position by the cam surface 205 of the drive arm 91 abutting on the cam pin 204, and the locking claw 201 does not lock on the gear portion 140 of the turntable 138 on the supply reel side.
The rotation of the supply reel 4 during loading is not prevented.

When the slide chassis 15 is moved rearward (upward in FIG. 3) and loading is performed from this state, the drive arm 91 rotates counterclockwise in FIG. The soft brake lever 197 through the spring 202
Is rotated in the counterclockwise direction against the urging force of. Then, the pressing of the pressing member 199 against the turntable 138 is released, and the rotation regulation of the supply reel 3 is released.
On the other hand, with this operation, the holding of the cam pin 204 by the cam surface 205 of the drive arm 91 is released, and the ratchet brake lever 184 is locked by the locking claw 201 to the gear portion 140 of the turntable 139 by the urging force of the spring 202. When the loading is completed, the supply reel 3 is prevented from rotating in the magnetic tape supply direction. After the loading is completed, when the cam gear 88 is further rotated, the ratchet brake lever 184 is rotated by the cam groove 204 via the cam pin 204, so that the locking pawl 201
Is released from the gear 140, and the supply reel 3
The rotation restriction of is released.

Here, the control device for 8 mm video of this embodiment will be described. As shown in FIG. 1, a drive unit 252 is connected to the control unit 251, and a drive motor 81, a capstan motor 136, and a drum motor 253 are connected to the drive unit 252 to control the drive. I can do it. As described above, the drive motor 81 moves the slide chassis 15 to function the slide mechanism and also functions the tape loading mechanism. The capstan motor 136 rotates the capstan 134 to rotate the tape travel mechanism. And the turntables 138 and 139 on the supply and take-up reel side are rotated to make the tape take-up mechanism function. Also,
The drum motor 253 rotates the rotary head drum 112 (drive mechanism).

The capstan motor 136 and the drum motor 253 are provided with rotation speed sensors 254 and 255 for detecting rotation speeds, respectively, and output signals thereof are inputted to the control unit 251. The control unit 251 is connected to running state abnormality detecting means 256 for detecting an abnormality in the running state of the magnetic tape 1. In this embodiment, as the running state abnormality detecting means 256, the rotation speed sensor 255 of the drum motor 253 and the supply reel side turntable 138 are used.
The rotation speed sensor 257 and the dew condensation sensor 258 of the rotary head drum 112 are provided. Drum motor 253
The rotation speed sensor 255 detects a rotation pulse of the motor, and inputs an abnormality to the control unit 251 when the rotation of the rotary head drum 112 stops or the speed decreases. The rotation speed sensor 257 of the supply reel-side turntable 138 uses a Hall element to input an abnormality to the control unit 251 when the rotation speed of the supply reel-side turntable 138 increases. The condensation sensor 258 of the rotary head drum 112 is a humidity sensor, and inputs an abnormality to the control unit 251 when the detected humidity exceeds a predetermined value.

The control unit 251 is connected to the cassette holder 11, the slide chassis 15, and a mode sensor 259 for detecting the loading state of the magnetic tape 1. Further, a switch signal (recording / playback / stop / eject, etc.) 260 of an operation button of 8 mm video is input to the control unit 251.

Hereinafter, the operation flow of storing the cassette 2 and loading the magnetic tape 1 and running drive in the above-described 8-mm video will be described.

When the cassette case 2 is mounted in the 8 mm video main body, as shown in FIG. 9, the cassette case 2 is inserted into the cassette holder 11 at the raised position from the front. When the cassette holder 11 is pushed down from above in the eject (up) position shown in FIGS. 10 and 11, the arms 19, 20, 29, and 30 of the elevating mechanisms 16 and 17 are tilted, and the cassette case 2 is stored. The cassette holder 11 moves to the lower position. At this time,
The cassette holder 11 (cassette case 2) can be lowered while keeping the horizontal state, and the left and right lifting mechanisms 16, 1
7, the movement of the arms 20, 30
The left and right elevating mechanisms 16 and 17 are linked to each other by a connecting rod 42 via pinions 40 and 41.
Operate synchronously, and the cassette holder 11
Is prevented from being twisted or skewed when descending.

When the cassette holder 11 is lowered, the cassette holder 11 is restrained by the lock mechanism 48 at the lowered position. That is, the arms 29, 30 of the lifting mechanism 17
Is tilted, the locking pin 55 is lowered, and the hook 50 is engaged with the locking pin 55. Therefore, the arm 30 is prevented from standing up, and the cassette holder 11 is restrained at the lowered position. When the detection switch 57 or 58 detects the movement of the cassette holder 11 to the lowered position, the detection switch 57 or 58 gives the information to a microcomputer (not shown) for controlling a drive motor and the like, and the microcomputer supplies a motor drive circuit. The drive motor 81 is driven through the
The slide base 15 on which 1 is supported starts moving.

When the cassette holder 11 is at the raised position, the lid 5 of the cassette case 2 is closed, and the tip of the tape protector 61 is
2 and is located substantially at the center in the radial direction.
Then, when the cassette holder 11 is lowered, the lid 5 of the cassette case 2 is opened to expose the magnetic tape 1, while the tape protector 61 is rotated upward as the cassette holder 11 is lowered. At this time, the lifting operation of the tape protector 61 is performed with a delay from the opening operation of the lid 5 of the cassette case 2, and the magnetic tape 1 exposed from the cassette case 2 is moved from the cassette holder 11 facing the outer peripheral surface of the rotary head drum 112. In the lowered position, the tape protector 61 moves up to a horizontal position.

Accordingly, when the cassette holder 11 (cassette case 2) is lowered, even if the magnetic tape 1 adheres to the back side of the cover 5 due to static electricity accompanying the opening of the cover 5 of the cassette case 2, 1 and rotating drum head 11
Since the tape protector 61 is located between the magnetic tape 1 and the magnetic tape 2, the magnetic tape 1 is prevented from riding on the rotary head drum 112.

When the cassette holder 11 is completely moved to the lowered position and is restrained at the lowered position by the lock mechanism 48, the drive motor 81 is driven to drive the cassette holder 11
Slides the slide base 15 supported by. That is, as shown in FIGS. 3 and 6, when the driving motor 81 is driven, the driving force is applied to the driving gear 80 and each connecting gear 8.
2, 83, 84, 85, 86, 87 via the cam gear 8
8 and the cam gear 88 rotates. Then
The drive arm 91 is rotated counterclockwise in FIG. 4 by the first cam groove 89 of the cam gear 88 via the cam shaft 95, and the cassette holder 11 is moved together with the slide chassis 15 as shown in FIGS. Base chassis 71
(Upward in the figure), and the support pin 73, which is the first reference axis, comes into contact with the end of the slide hole 77 to stop positioning at a predetermined loading position.

The magnetic tape 1 is loaded while the slide chassis 15 is slid by the drive motor 81. That is, the eject (lower) position of the slide chassis 15 shown in FIGS. 3 and 6 is the unloading state of the magnetic tape 1. From this state, the slide chassis 15 is slid and the magnetic tape 1 is pulled out for loading. Then, the magnetic tape 1 shown in FIGS. 4 and 7 is loaded.

As shown in FIGS. 4 and 7, the drive motor 8
As described above, the cam gear 88 rotates, and the driving force is transmitted to the first drive gear 109 and the second drive gear 110, and the first ring gear 114 and the second ring gear 115 move in different directions. That is, the first ring gear 114 rotates in the counterclockwise direction in the figure, and the second ring gear 115 rotates in the clockwise direction. Then, as shown in FIG. 9, the first guide base 118 moves along the loading guide groove 116, while the second guide base 127 moves along the loading guide groove 117. At this time, the guide pins 119 and 120 of the first guide base 118 are guided by the loading guide grooves 116, and the guide pins 126 are
It moves while being guided by 25. When the first guide base 118 moves to the end of the loading guide groove 116, the guide pin 126 moves to the guide portion 125.
The guide pins 119 and 120 are distributed to each of the two forked portions of the loading guide groove 116 and move.

Accordingly, the magnetic tape 1 in the cassette case 2 is provided with the guide rollers 121 and the guide posts 122 and 123 of the first guide base 118 and the second guide base 127.
And is brought into sliding contact with the outer peripheral surface of the rotary head drum 112 by the guide roller 130 and the guide post 131.

The magnetic tape 1 is loaded by a plurality of guide rollers or guide posts on both sides of the rotary head drum 112, while being loaded by the movement of the first and second guide bases 118 and 127. As shown in FIGS. 3 and 4, one side of the slide chassis 15
Moves backward, the pin 1 of each link 150, 151
The links 54 and 155 move by the guide grooves 157 and 158, and the links 150 and 151 rotate.
Then, the guide roller 148 of each link 150, 151
Then, the guide post 149 moves to pull out the magnetic tape 1.

Further, when the slide chassis 15 moves rearward on the other side of the slide chassis 15, the movement of the second guide pin 164 of the support arm 165 is restricted by the restricting portion 170, and the support arm 165 and the pinch arm 161 rotate. Move. Then, when the support arm 165 rotates by a predetermined amount, the second guide pin 164 is disengaged from the regulating portion 170, and the first and second guide pins 163, 164 move along the guide grooves 167, 168, and the first guide pin 164 is moved. 163
Fits into the engagement groove 171 of the operation lever 102. Thus, the pinch roller 159 moves to pull out the magnetic tape 1. When the pinch roller 159 moves, the guide arm 172 rotates and the guide roller 160 moves.
Guides the magnetic tape 1.

When the magnetic tape 1 is loaded, various kinds of brakes 181 and 181 are provided on the supply reel 3 and the take-up reel 4 of the cassette case 2 around which the magnetic tape 1 is wound.
193 and 194 are operating.

When the magnetic tape 1 is loaded, as shown in FIG. 3, the ratchet brake lever 184 on the take-up reel 4 causes the locking claw 183 to be moved by the previous loading and unloading operations to turn the turntable 139 on the take-up reel. And is prevented from rotating in the pull-out direction (counterclockwise in FIG. 3) of the magnetic tape 1 when the take-up reel 4 is loaded. Therefore, the magnetic tape 1 is not pulled out from the take-up reel 4 during loading, and is prevented from being recorded again on the recorded magnetic tape 1 wound on the take-up reel 4.

When the magnetic tape 1 in the cassette case 2 inserted into the cassette holder 11 is entirely wound on the take-up reel 4 and there is no magnetic tape 1 wound on the supply reel 3, loading is performed. Can not
The magnetic tape 1 is cut. In this case, this is detected by a detector (not shown), and the operation lever 182 is rotated counterclockwise about the pivot 103 from the state shown in FIG. 3, thereby rotating the operation lever 188 clockwise. Then, the engagement piece 189 becomes the engagement pin 187.
Is pressed to rotate the ratchet brake lever 184 in the counterclockwise direction, so that the locking to the ratchet 182 by the locking claw 183 is released, and the restraint of the turntable 139 is released. It becomes rotatable in the pull-out direction.

When loading the magnetic tape 1,
As shown in FIG. 3, the soft brake lever 197 rotates in the magnetic tape supply direction by the inertia force of the supply reel 3 when the pressing member 199 presses against the turntable 138 on the supply reel side by the urging force of the spring 202. Block. When the loading is completed, as shown in FIG. 4, the cam surface 205 of the drive arm 91 rotates the soft brake lever 197 via the cam pin 203, and the pressure contact of the pressure contact member 199 to the turntable 138 is released. The rotation restriction of the supply reel 3 is released.

On the other hand, when loading the magnetic tape 1,
As shown in FIG. 3, the ratchet brake lever 200 is held at that position by the cam surface 205 of the drive arm 91 abutting on the cam pin 204, and the locking claw 201 does not lock on the gear portion 140 of the turntable 138, The rotation of the supply reel 3 is not prevented. Then, when the loading is completed, as shown in FIG.
05, the holding of the cam pin 204 is released, and the ratchet brake lever 200 locks the locking claw 201 with the gear portion 140 of the turntable 138 by the spring 202, thereby preventing the supply reel 3 from rotating in the magnetic tape supply direction. Is done.

As described above, the magnetic tape 1 includes the guide rollers 121, 130, 148, and 160, the guide posts 122, 123, 131, and 149, and the pinch roller 159.
As a result, it is pulled out from the cassette case 2 and loaded on a predetermined locus. The loading state of the magnetic tape 1 shown in FIGS. 4 and 7 is a stop state in 8 mm video.

When the operator presses the play button in this state, the drive motor 81 is driven again, and the cam gear 88 is rotated by the second cam groove 90 as shown in FIGS. The operation lever 102 is rotated counterclockwise in FIG. 7 via the connection lever 99.
Then, the support arm 165 and the pinch arm 161 are rotated clockwise through the engagement groove 171 of the operation lever 102 and the first guide pin 163. Accordingly, the pinch roller 159 comes into contact with the capstan 134 and moves to a position sandwiching the magnetic tape 1 together with the capstan 134, and the drive motor 81 stops.

As described above, the operating lever 102
Is rotated, the engagement piece 192 pushes the engagement pin 187 to rotate the ratchet brake lever 184, whereby the restraint of the turntable 139 is released and the take-up reel 4 becomes rotatable. Further, when the cam gear 88 rotates, the ratchet brake lever 184 is rotated by the cam groove 206 via the cam pin 204, so that the locking pawl 201
Is released from the gear 140, and the supply reel 3
The rotation restriction of is released.

As described above, the supply reel 3 and the take-up reel 4
When the rotation restriction is released, the take-up reel 4 can be driven and rotated to run the magnetic tape. That is, as shown in FIG. 5, when the capstan motor 136 is driven, the capstan gear 135 is rotated, and its rotational force is transmitted to the gear pulley 142 via the gear pulley 137 and the belt 143. Rotate clockwise. Then, the idle gear 147 rotates counterclockwise in FIG.
46 rotates to the right around the rotation shaft 144, and the idle gear 147 rotates to the turntable 139 on the take-up reel side.
Gear section 141. Therefore, the idle gear 14
7 is transmitted to the turntable 139, and the turntable 139 rotates clockwise. Then, the take-up reel 4 rotates in the same direction to rotate the magnetic tape 1.
Travels in the feed direction. Then, recording or reproduction can be performed as the magnetic tape 1 runs.

As shown in FIG. 5, the running locus of the magnetic tape 1 is such that the magnetic tape 1 pulled out of the cassette case 2 is guided by the guide roller 148 and the guide post 14.
9, impedance roller 133, guide roller 13
0, rotating head drum 11 via guide post 131
2 are slidably contacted with the outer peripheral surface of the guide post 122, 123,
After passing through the guide roller 121, the capstan 134 (pinch roller 159), and the guide roller 160, it enters the cassette case 2 again.

When the recording or reproduction of the magnetic tape 1 is completed and the operator presses the stop button while the magnetic tape 1 is running, the capstan motor 136 stops, the rotation of the take-up reel 4 stops, and the drive is stopped. The motor 81 rotates in the opposite direction to that described above, and the pinch rollers 159
4 and the state shown in FIG. 4 is obtained. Further, the ratchet brake 181 restrains the take-up reel 4 to prevent rotation, and the ratchet brake 194 restrains the supply reel 4 to prevent rotation.

When the operator presses the eject button when the magnetic tape 1 is stopped, the drive motor 81 rotates in the reverse direction, the loading of the magnetic tape 1 is released, the magnetic tape 1 is returned into the cassette case 2, and the slide chassis 15 is moved forward. 4 (downward in FIG. 4), and enters the unloading state shown in FIGS.

When the slide chassis 15 moves to the ejecting position (unloading state) shown in FIGS. 3 and 6, the hook 5 is attached to the release lever 105 of the base chassis 71.
When the hook 50 rotates in the counterclockwise direction against the urging force of the spring 51, the engagement with the locking pin 55 is released. Then, the arms 29 and 30 of the elevating mechanism 17 are erected by the urging force of the spring 37, and the arms 19 and 20 of the elevating mechanism 16 are also erected by the urging force of the spring 27, and the cassette holder 11 is raised.

When the cassette holder 11 is raised by the lifting mechanisms 16 and 17, the cassette holder 11 is raised by the urging force of the springs 27 and 37, but when the arm 29 stands up, its rear end moves forward together with the slide member 45. By rotating the pinion 46 via the rack 44, the rotation of the pinion 46 becomes gentle by the action of the oil damper 47, and the cassette holder 1 is rotated.
Shock and vibration at the time of lifting / lowering of 1 are reduced to operate gently.

After the cassette holder 11 is lifted, the cassette case 2 can be taken out of the cassette holder 11.

FIG. 2 is a flowchart showing a case where the magnetic tape 1 adheres to the rotating head drum due to a charging phenomenon or dew condensation while the magnetic tape 1 is running for recording or reproduction. It will be described based on the following. The control operation described below is controlled by the control unit 251. As shown in FIG.
During the recording operation of the 8 mm video, the magnetic tape 1 is loaded on a predetermined path as shown in FIG.
And the rotary head drum 112 rotates, so that the magnetic tape 1 runs in the direction indicated by the solid line in FIG.

At this time, in step S2, the rotation speed sensor 255 detects whether or not the rotation speed of the rotary head drum 112 (drum motor 253) has decreased. If the rotation speed has decreased, the process proceeds to step S5. I do. In step S3, the rotation speed sensor 257 detects whether the rotation speed of the supply reel-side turntable 138 is increasing. If the rotation speed is increasing, the process proceeds to step S5. Further, in step S4, the dew condensation speed sensor 257 detects whether or not the humidity of the rotary head drum 112 exceeds a predetermined value. If it is, the process proceeds to step S5, and if not, returns to step 1.

If an abnormality occurs in the traveling route or traveling speed of the magnetic tape 1 by the sensors 255, 257, and 258 in steps S2, S3, and S4, the magnetic tape 1 is placed on the outer peripheral surface of the rotary head drum 112 in step S5. Is determined, first, the rotation of the rotary head drum 112 (drum motor 253) is stopped. Next, in step S6, the capstan 134 (capstan motor 136)
To stop. Further, in step S7, the pinch arm 1
61 to rotate the pinch roller 159 to the capstan 1
34 to release the crimping operation. Thus, the running of the magnetic tape 1 is stopped. Then, in step S8, the dew condensation indicator lamp is turned on to notify the user of the occurrence of the running abnormality of the magnetic tape 1.

In this state, an input of the ejection button detection signal 260 from the user is awaited. In step S9, when the ejection button detection signal 260 is input, the process proceeds to step S10, and first, the drive motor The slide chassis 15 is moved backward by operating 81, and then the process proceeds to step S11, where the loading of the magnetic tape 1 is released by moving the first and second guide bases 118 and 127. Then, in step S12, the turntable 138 on the supply reel side is rotated in the counterclockwise direction in FIG. Take up. In step S13, the rotation head drum 112 is rotated counterclockwise in FIG.
(In the direction of the arrow indicated by the dotted line). It is preferable that the rotation speed of the rotary head drum 112 at a low speed is substantially equal to the rotation speed of the turntable 138 on the supply reel side.

Therefore, in step S15, if the magnetic tape 1 has been stuck to the outer peripheral surface of the rotary head drum 112, the magnetic tape 1 is wound around a supply reel while being peeled off.
At this time, the sticking start portion 1a of the magnetic tape 1 stuck to the outer peripheral surface of the rotary head drum 112 is easily peeled off by the reverse rotation of the rotary head drum 112 at a low speed. Without this, the magnetic tape 1 can be easily rewound.

In this embodiment, while the turntable 139 on the take-up reel side is stopped, the turntable 138 on the supply reel side is rotated in reverse, and the rotary head drum 112 is rotated in reverse at low speed. Although the drawn-out magnetic tape 1 is configured to be wound around a supply reel, it may be reversed. That is, while the turntable 138 on the supply reel side is stopped, the turntable 139 on the take-up reel side is rotated, and the rotating head drum 1 is rotated.
The magnetic tape 1 may be wound around a take-up reel by rotating the magnetic tape 12 at a low speed.

[0098]

As described above, according to the control method of the magnetic recording / reproducing apparatus and the apparatus according to the present invention, when the abnormality of the running state of the running magnetic tape is detected, After the operation of the traveling mechanism is released to stop the traveling of the magnetic tape, the tape loading mechanism is released, the tape winding mechanism is operated, and the rotating head drum is wound by the driving mechanism on the supply side or winding side reel. Since the magnetic tape is wound while being rotated in the take-up direction, when the magnetic tape is running abnormally, the magnetic tape can be easily accommodated in the case without damaging the magnetic tape.

[Brief description of the drawings]

FIG. 1 is a control block diagram of an 8 mm video control device for implementing a control method of a magnetic recording / reproducing device according to one embodiment of the present invention.

FIG. 2 is a flowchart of control.

FIG. 3 is a plan view of a slide chassis showing an ejected state in 8 mm video.

FIG. 4 is a plan view of the slide chassis showing a loading state.

FIG. 5 is a plan view of a slide chassis showing a tape running state.

FIG. 6 is a plan view of a base chassis showing an ejected state in 8 mm video.

FIG. 7 is a plan view of the base chassis showing a loading state.

FIG. 8 is a plan view of a base chassis showing a tape running state.

FIG. 9 is a plan view illustrating a loading mechanism.

FIG. 10 is a perspective view of a cassette holder.

FIG. 11 is a right side view of the cassette holder.

FIG. 12 is a left side view of the cassette holder.

FIG. 13 is a plan view of a slide chassis showing a state in which a magnetic tape is attached.

FIG. 14 is a plan view illustrating a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 magnetic tape 2 cassette case 3 supply reel 4 take-up reel 11 cassette holder 15 slide chassis 16, 17 elevating mechanism 71 base chassis 81 drive motor 88 cam gear 91 drive arm 112 rotating head drum 116, 117 loading guide groove 118 first guide base 127 Second guide base 134 Capstan 136 Capstan motor 138 Supply reel side turntable 139 Takeup reel side turntable 159 Pinch roller 161 Pinch arm 251 Control unit 252 Drive unit 253 Drum motor 254, 255, 257 Rotation speed sensor 256 Travel Status abnormality detection means 258 Dew condensation sensor

Claims (2)

(57) [Claims] And 1. A Rotating head drum and a driving mechanism,
A tape loading mechanism that pulls out a magnetic tape from the cassette and winds it around the rotary head drum, a tape running mechanism that presses a pinch roller against a capstan to run the magnetic tape, and a magnetic tape that is drawn out by the tape loading mechanism And a tape take-up mechanism that winds the tape on a supply side or a take-up side reel and stores the tape in a cassette. When an abnormality in the running state of the running magnetic tape is detected, the operation of the tape running mechanism is released. The tape loading mechanism is later released to operate the tape winding mechanism, and the driving mechanism rotates the rotary head drum in the tape winding direction to the supply side or winding side reel. A method for controlling a magnetic recording / reproducing apparatus. 2. A Rotating head drum and a driving mechanism,
A tape loading mechanism that pulls out a magnetic tape from the cassette and winds it around the rotary head drum, a tape running mechanism that presses a pinch roller against a capstan to run the magnetic tape, and a magnetic tape that is drawn out by the tape loading mechanism A tape winding mechanism for winding the magnetic tape on a supply or take-up side reel and housing the tape in the cassette, a running state abnormality detecting means for detecting an abnormality in a running state of the magnetic tape, and a detection result of the running state detecting means. After releasing the operation of the tape running mechanism based on the above, the tape loading mechanism is released to activate the tape winding mechanism, and the driving mechanism drives the rotary head drum to wind the tape on the supply side or winding side reel. Magnetic recording, comprising control means for rotating in the take-off direction. The control device of the raw devices.