JPS6338778B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic tape loading device, and more particularly, to a configuration in which a tape pull-out member that moves according to the running of a strip is locked in a state where it is pressed against a locking member at a tape loading completion position. An object of the present invention is to provide an automatic tape loading device that can load a tape into a predetermined tape path with high precision.

In general, an automatic tape loading device is provided with a mechanism for regulating a tape drawer member to a tape loading completion position in order to accurately form a tape path. Conventional position regulating mechanisms have the drawback of being relatively complex and prone to failure. The complexity of the above configuration is due in part to the complexity of the tape loading mechanism.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

Fig. 1 is a plan view of an embodiment of the automatic tape loading device according to the present invention when no tape is loaded (in stop mode), Fig. 2 is a plan view showing the state after tape loading is completed, and Fig. 3 FIG. 2 is a diagram showing a mechanism on the underside of the sub-chassis that moves a member for pulling out the tape.

First, the tape loading operation will be briefly explained. Toothed belts 2 and 3 are separately installed in parallel on the tape exit side and the tape entrance side with respect to the guide drum 1.
The guide pole mechanisms 4 and 5 move in the directions of arrows D and E along guide grooves 7 and 8 formed in the sub-chassis 6, as the guide pole mechanisms 4 and 5 move in opposite directions. The guide pole mechanisms 4 and 5 move while locking the magnetic tape 9 and pulling it out of the cassette 10. When the guide pole mechanisms 4 and 5 reach their final positions, the tape 9 is loaded onto a tape path that is attached to the circumferential surface of the guide drum 1 over a predetermined angular range, as shown in FIG. The tape loading/unloading operation is performed by moving the guide pole mechanisms 4, 5 in the opposite direction to the above.

Next, the configuration and operation of the automatic tape loading device will be explained in detail.

Regarding the mechanisms that are configured symmetrically on the tape exit side and the tape entrance side with respect to the guide drum 1, only the configuration on the tape exit side will be explained, and the corresponding configuration on the tape entrance side will be explained. The same reference numerals with the suffix "a" are given to the parts, and the explanation thereof will be omitted.

When the tape is not loaded as shown in FIG. 1, the cassette 10 is inserted into a cassette holder (not shown), and each reel is fitted into the supply reel disk 11 and the take-up reel disk 12 and held in a predetermined position. It is installed on. Magnetic tape 9 is cassette 10
located along the front of the The vertical guide roller 13 and the inclined guide pole 14 of the guide pole mechanism 4 are placed in the opening 10a on the front side of the cassette 10, and the vertical guide roller 15 and the inclined guide pole 16 of the guide pole mechanism 5 are placed in the opening 10b. The capstans 17 are fitted into each of the capstans 10c, and each capstan 17 is located on the side opposite to the inside of the magnetic tape 9.

The sub-chassis 6 is provided above the main chassis 18 so as to face and be spaced apart therefrom. A mechanism shown in FIG. 1 is assembled on the sub chassis 6, and a mechanism shown in FIG. 3 and a pinch roller mechanism are installed on the main chassis 18.

The guide drum 1 consists of an upper rotating drum having a rotating video head and a lower fixed drum,
It is provided on the sub chassis 6.

When a play (or record) operation is performed in the state shown in FIG. 1, the tape loading motor 20 attached to the lower surface of the main chassis 18 starts.
The worm gear 23 rotates in the direction of arrow A via the belt 21 (passing through the opening 18a of the main chassis 18) and the pulley 22. The worm gear 23 is supported on the sub-chassis 6 by bearings 24 and 25. A pair of worm wheels 26 and 27 are meshed with the worm gear 23 at left and right opposite positions, and the rotation of the worm gear 23 causes the worm wheels 26 and 27 to rotate in the directions of arrows B and C, respectively.

The worm wheels 26 and 27 are supported on shafts 28 and 29, respectively, which are installed in the main chassis 18. The worm wheels 26 and 27 have the function of running the toothed belts 2 and 3, respectively, and the mechanism provided in connection with the worm wheel 26 and forming the main part of the present invention is shown in FIGS.
The structure is shown in FIG. 30 is a disk,
31 is a toothed pulley, each of which is connected to the main chassis 1.
8 and the subchassis 6, it is independently supported on a shaft 28. Therefore, the worm wheel 26, the disk 30, and the toothed pulley 31 are independently supported on the same shaft 28. A pin 32 is installed on the upper surface of the worm wheel 26, and the pin 32 is inserted into a corresponding hole 34 of the disc 30 through a semicircular opening 33 of the sub-chassis 6. Thereby, the disk 30 rotates integrally with the worm wheel 26. Toothed pulley 3
A C-shaped groove 35 is formed on the upper surface of 1. A portion of the C-shaped groove 35 is made wide, and a stepped portion 36 extending in the radial direction is formed. Further, an arcuate plate piece 37 is fixed to the lower surface of the disc 30. This arcuate plate piece 37 has a radial step 38 . The disc 30 and the toothed pulley 31 are arranged close to each other with the arcuate plate piece 37 fitted into the C-shaped groove 35 and the coil spring 39 disposed within the C-shaped groove 35. The large-diameter disk 30 acts as a guide collar for the toothed belt 2. The coil spring 39 is latched at one end to a pin 40 at the end of the groove 35 and at the other end to a pin 42 set on the arc-shaped plate piece 37 through an opening 41 in the disc 30, so that the tensile force can be applied in advance. It is strung up in a charged state. Due to the action of the coil spring 39, the disk 30 is biased to rotate clockwise in FIG. 3, and the toothed pulley 31 is biased to rotate counterclockwise.
8 are pressed against each other and their rotation is relatively restricted, and both rotate substantially integrally. Here, the stored tensile force of the coil spring 39 is set to a magnitude that allows the toothed pulley 31 to reliably follow the counterclockwise rotation of the disc 30 against the tape loading operation load. By connecting the disc 30 and the toothed pulley 31 as described above by the action of the coil spring 39, as will be described later, the toothed pulley 31 is rotated counterclockwise at the final rotational position of the disc 30. (FIG. 9), whereby the guide pole mechanism 4 is reliably held at a predetermined position.

A mechanism related to another worm wheel 27 also includes:
It has the same structure as the above mechanism, and its explanation will be omitted.

Incidentally, convex cams 43 and 44 are formed on the upper surfaces of the worm wheels 26 and 27 to operate a pressing mechanism to be described later, and a C-shaped cam groove 45 is further formed on the upper surface of one of the worm wheels 27. It has been formed.

As shown in FIG. 3, the endless toothed belt 2 includes a toothed pulley 31, guide pulleys 50, 51,
52 and 53, forming a closed loop. The first guide pulley 51 has a pin 5
4 is provided on a rotating arm 55 which is pivotally supported by the rotary arm 55. The rotating arm 55 is fixed by a screw 56 in a state where the toothed belt 2 is wrapped around it and then rotated to press the guide pulley 51 against the toothed belt 2 to apply a predetermined tension to the belt 2. The toothed belt 3 runs reliably without slipping in accordance with the rotation of the toothed pulley 31. The toothed belt 3 is wound around the toothed pulley 31 by approximately 270 degrees due to the action of the guide pulley 53.
Slippage between the toothed belt 3 and the toothed pulley 31 is more reliably prevented. In addition, toothed belt 2
The tension portion 2a between the toothed pulley 31 and the guide pulley 50 extends in the directions of arrows _Y1 and _Y2 .

The endless toothed belt 3 on the tape entry side is also stretched around in the same manner as the toothed belt 2 described above.

Mechanisms 60 and 61 are fixed to each of the toothed belts 2 and 3 to connect them to the guide pole mechanisms 4 and 5. In the connecting mechanism 60, 62 is a block, and as shown in FIGS. 5 and 6, the T-shaped bottom section 63 is irremovably fitted into the guide groove 64 of the main chassis 18, and the main chassis is connected. It is placed on 18. The guide groove 64 is
It extends parallel to the tension portion 2a of the belt 2. 6
Reference numeral 5 denotes a connecting member, in which the toothed belt 2 is pressed and clamped against the toothed side surface 67 of the block 62 by a bent piece 66, and the block 6 is connected by two screws.
It is installed on 2. As a result, the coupling mechanism 60 is fixed to the toothed belt 2, and guided by the guide groove 64, it moves along the arrows Y ₁ and Y ₂ as the toothed belt 2 travels.
move in the direction.

Note that the connection mechanism 60 is connected to the worm wheel 26
It is positioned and fixed to the belt 2 so that when it is in the rotating position shown in FIG. 1, it is in the return position shown in FIG. Here, since no slipping occurs between the toothed belt 2 and the toothed pulley 31 and the toothed belt 2 does not elongate, the worm wheel 26
The relative positional relationship between the rotational angular position and the position of the connecting mechanism 60 in the arrow Y ₁ and Y ₂ directions is always reliably maintained in a predetermined relationship.

Note that the connecting member 65 is formed with a long hole 68 extending in a direction perpendicular to the moving direction of the connecting mechanism 60 (arrow X ₁ , X ₂ direction), and the guide pole mechanism 4 is inserted into the long hole 68 . The connecting pin 74 is fitted.

Another coupling mechanism 61 is configured similarly to the coupling mechanism 60 described above.

As particularly shown in FIGS. 5 and 6, the guide pole mechanism 4 includes a mounting table 70 on which vertical guide rollers 13 are provided, and an inclined guide pole 14 installed on the mounting table 70. It consists of a mounting plate 71.

The mounting table 70 guides a vertical pole 72 and a protrusion 73 (the vertical pole 72 and the protrusion 73 are located apart from each other in the directions of arrows Y ₁ and Y ₂ ) that are planted through the mounting table 70 . It is fitted into the groove 7 and placed on the sub chassis 6. Further, a connecting pin 74 is installed on the upper surface of the mounting table 70 at a position intermediate between the vertical pole 72 and the protrusion 73. This connecting pin 7
4 passes through the guide groove 7 and fits into the long hole 68. Further, a leaf spring 75 is attached to the connecting pin 74 so as to face the lower surface of the sub-chassis 6. Due to the action of the leaf spring 75, the mounting table 70 is in a state of being elastically drawn onto the sub-chassis 6, and the sub-chassis 6
It moves smoothly on the top along the guide groove 7. The vertical guide roller 13 is provided on the vertical pole 72.

The mounting plate 71 has a hole 76 fitted into the vertical pole 72 so that it can be rotated around the vertical pole 72, and a long hole 77 and a screw 78 are used to set the mounting plate 71 at a predetermined rotational position (the inclined guide pole 14 position facing the guide drum 1 at a predetermined angle in the state shown in the figure)
It is fixed at Note that this rotational position adjustment work is easily performed by inserting the tip of a flathead screwdriver into the rear V notch 79 of the mounting plate 71 and the recess 80 on the mounting table 70 and twisting the tip.

In addition, since the connecting pin 74 is fitted into the elongated hole 68 as described above, the guide pole mechanism 4 is connected to the connecting mechanism 60, and moves in the directions of arrows Y ₁ and Y ₂ following this movement. (note that arrow X ₁ ,
In the X ₂ direction, it moves independently with respect to the coupling mechanism 60).

Another guide pole mechanism 5 has the same structure as the guide pole mechanism 4 described above.

When the worm wheels 26 and 27 rotate as described above, the toothed pulleys 31 and 31a rotate together with them in the directions of arrows B and C, and the toothed belts 2 and 3 run without slipping, and the connection mechanism 60 and 61 move in the direction of arrow _Y1 along guide grooves 64 and 64a, respectively (see FIG. 3). Connection mechanism 60, 61
As the guide pole mechanisms 4 and 5 move, the guide pole mechanisms 4 and 5 move accordingly. The guide pole mechanisms 4 and 5 are
Vertical poles 7 located on the upper front and rear sides in the direction of movement
2, 72a and the protrusions 73, 73a in the guide groove 7,
8 and moves in the directions of arrows D and E. The guide grooves 7 and 8 allow the guide pole mechanisms 4 and 5 to move toward the guide drum 1 without colliding with the guide drum 1, etc.
The connecting mechanism 60, 61 is formed so as to be guided to the position shown in FIG.
The direction of movement is different from that of . However, since the connecting pin 74 freely moves in the directions of arrows X ₁ and X ₂ along the elongated hole 68, the guide pole mechanisms 4 and 5
The connecting mechanisms 60 and 61 can move along different paths, that is, along the guide grooves 7 and 8.

When the guide pole mechanisms 4 and 5 come out of the openings 10a and 10b of the cassette 10, the guide rollers 13 and 15 and the guide poles 14 and 16 lock the magnetic tape 9 and pull it out of the cassette 10.

Here, the direction of movement of the guide pole mechanisms 4 and 5 is determined by the guide grooves 7 and 8, and the end side 7 of the guide grooves 7 and 8 in the direction of arrow _Y2
a, 8a shows the guide pole mechanisms 4, 5 with their inclined guide poles 14, 16 facing the arrows _X1 , _X2 , and vertical guide rollers 13,
It is formed to be oriented in alignment with 15. Moreover, the openings 10a and 10b of the cassette 10
In relation to the tape roll formed inside,
The shape is wide in the direction of the arrow X and narrow in the direction of the arrow Y. When no tape is loaded, the inclined guide poles 14, 16 and the vertical guide rollers 13, 15 are aligned in a tilted direction along the arrow X (direction parallel to the front surface of the cassette 10) as shown in FIG. ,
When the cassette 10 is installed, the guide pole 14 and the guide roller 13 enter the narrow opening 10a, and the guide pole 16 and the guide roller 13 enter the narrow opening 10b smoothly without colliding with the cassette wall surface etc., and the magnetic tape 9 entering the inside of the guide poles 14 and 16 will not occur.

The guide pole mechanisms 4, 5 move along the guide grooves 7, 8 to the position shown in FIG. 2 while locking the magnetic tape 9 and pulling it out from the cassette 10. Note that when the tape is not loaded and during the tape loading operation, the support arm 90 moves the pin 91 on the branch arm 90a to the worm wheel 2 as shown in FIG.
The impedance rollers 94,
The full width erasing head 95 and the guide pole 96 are set back from the moving path of the guide roller 15 and guide pole 16 of the guide pole mechanism 5. The impedance roller 97 on the tape exit side is supported at the tip of an L-shaped lever 101 which is pivotally supported by a pin 98, applied with clockwise rotational force by a spring 99, and restricted from rotating in the same direction by a stop pin 100. ing. As a result, the guide pole mechanism 4 moves with the vertical guide roller 13 pushing away the impedance roller 97 in the direction of arrow _X1 (the L-shaped lever 101 rotates counterclockwise against the spring 99).

The guide pole mechanisms 4 and 5 are locked (position restricted) as shown in FIGS. 7 and 8 at the final position shown in FIG. 2.

Arrow D along the guide groove 7 of the guide pole mechanism 4
The directional movement is restricted by the upper and lower parts of the vertical pole 72 abutting against the upper V-shaped groove 111 and the lower V-shaped groove 112 of the stopper 110, respectively. The stopper 110 is fixed to the sub-chassis 6. The mounting table 70 of the guide pole mechanism 4 has a pressing lever 113
It enters the lower side (indicated by the two-dot chain line in Fig. 8).
The push lever 113 is pivoted on a pin 115 on a support bracket 114 fixed on the subchassis. A leaf spring 117 is attached to the pressing lever 113.
is fixed. Normally, the U-shaped bent portion 118 at the tip of the leaf spring 117 is bent by the action of the spring 116 onto the upper surface of the worm wheel 26 (rotational path m of the convex cam 43).
The pressing lever 113 is rotated clockwise in FIG. 8 and raised.

Even after the movement of the guide pole mechanism 4 in the direction of arrow D is restricted and the rotation of the toothed pulley 31 in the direction of arrow B is restricted, the motor 20 continues to rotate. The rotation of the motor 20 is controlled by the pin 32 of the worm wheel 27.
a is the switch lever 120 as shown in FIG.
It stops when one arm (which is supported by the shaft 29) is pressed and one of the microswitches 121 is turned off. Due to the above rotation of the motor 20, the worm wheel 26 and the disc 30 are deformed by tensile force of the coil spring 39, and the toothed pulley 3
Rotates independently of 1. When the motor is stopped, the disc 30
(The worm wheel 26) and the toothed pulley 31 rotate about half a turn to the state shown in FIG.
The rotation of the worm wheel 26 is restricted by the worm gear 23, and the step portion 36 and the radial step portion 3
8 is separated from the toothed pulley 31, and the rotational force in the direction of arrow B is applied by the tensile force of the coil spring 39 which is tensilely deformed. The rotational force of the toothed pulley 31 acts as a displacement force in the direction of arrow _Y1 on the coupling mechanism 60 via the toothed belt 2 which does not elongate.
The guide pole mechanism 4 is biased in the same direction, and the vertical pole 72 engages the upper and lower V-shaped grooves 111 of the stopper 110,
112. As a result, in the guide pole mechanism 4, the vertical guide pole 72 comes into pressure contact with the V-shaped grooves 111 and 112 at two locations, upper and lower.
By accurately determining the position and perpendicularity of the vertical guide roller 13 in the directions of arrows X and Y, and by closely fitting the protrusion 73 into the guide groove 7, the direction of inclination of the inclined guide pole 14 can be determined. location is regulated.

Note that the position where the connecting mechanism 60 applies the above-mentioned displacement force to the guide pole mechanism 4 is an intermediate position between the upper and lower V-shaped grooves 111 and 112, as shown in FIG. Due to the urging of the above displacement force, stable pressure contact is achieved without unnecessary tilting.

In addition, the stopper 110 of the vertical pole 72 described above
In parallel with the pressing operation, the pressing operation described below is performed. At the final rotational position where the worm wheel 26 rotates together with the toothed pulley 31,
The convex cam 43 is the U-shaped bent portion 11 of the leaf spring 117.
It is located just before the number 8. When the worm wheel 26 rotates independently of the toothed pulley 31, the inclined surface 43a of the convex cam 43 gradually pushes up the leaf spring 117, and the pressing lever 113 moves counterclockwise in FIG. 8 against the spring 116. direction and presses the mounting table 70 of the guide pole mechanism 4 in _{the two} directions of arrow Z. When the worm wheel 26 stops rotating, the U-shaped bent portion 118 of the leaf spring 117 faces the top plane 43b of the convex cam 43, and the leaf spring 11
7, the pressing lever 113 presses the guide pole mechanism 4 against the sub chassis 6 and clamps it therebetween, and the vertical guide roller 1
3 and the inclined guide pole 14 are restricted in their positions in the direction of arrow Z.

Here, since the force for regulating the position of the vertical guide roller 13 in the directions of arrows X and Y and the force for regulating the position in the direction of arrow Z gradually increase in parallel, one position regulation The position regulating operation of the other one is not restricted by the operation, and the vertical guide roller 13 is positioned at an accurate position in the directions of arrows X, Y, and Z at the loading position.

The operation of moving the guide pole mechanism 5 on the tape entry side to the tape loading position and the operation of regulating the position to that position are performed in the same manner as in the above case.

Regarding the guide pole mechanisms 4 and 5, when a rotary lever is used as in the past, the movement path and orientation in the unloaded and loaded positions are uniquely determined by the rotation center position of the rotary lever. However, in this embodiment, by appropriately determining the positions, extending directions, etc. of the guide grooves 7 and 8, the non-uniformity shown in FIGS. 1 and 2 of the guide pole mechanisms 4 and 5 can be achieved. The loading position, the loading position, and the moving route along the way can be individually determined to be optimal.

Note that when the worm wheel 27 rotates in the direction of arrow C, the pin 91 is guided by the C-shaped cam groove 45. The vertical guide roller 15 of the guide pole mechanism 5 on the tape entry side is an impedance roller 94.
The pin 91 is guided by the arc portion 45a of the cam groove 45 until the support arm 90 passes in front of the first
It is held in the rotational position shown in the figure. After this, pin 9
1 is guided by the linear portion 45b of the cam groove 45, the support arm 90 rotates counterclockwise to the position shown in FIG.

As a result, the tape loading device becomes as shown in FIG. 2 (the pinch roller mechanism will be described later), and the magnetic tape 9 is pulled out of the cassette 10 and loaded onto the guide drum between the pair of guide pole mechanisms 4 and 5. The tape is loaded into a predetermined tape path including a tape path attached around the circumference of the tape over a predetermined angular range. On the tape entry side, the magnetic tape 9 is attached to a guide pole 96, a full-width erase head 95, and an impedance roller 94, and on the tape exit side, the magnetic tape 9 is attached to an impedance roller 9.
7. Audio control head 130, guide pole 131 and approaching pinch roller 14
Attach to 0.

Next, we will explain the pinch roller mechanism in Figures 1 and 2.
This will be explained with reference to FIGS.

This mechanism previously moves the pinch roller 140 from a position away from the cassette 10 to a position close to the capstan 17 in connection with the tape loading operation described above, and by the subsequent operation of the solenoid,
The pinch roller 140 is configured to move a small distance and press against the capstan 17.

A shaft 141 installed on the main chassis 18 has an L-shaped lever 142 and a pressure applying lever 14.
3 and the pinch roller support lever 144 are stacked and supported independently.

One arm portion 144 of the pinch roller support lever 144
A pinch roller 140 is provided at the tip of a. A spring 145 with a large spring constant is stretched between the other arm portion 144b of this lever 144 and the tip of the pressure applying lever 143.
means the other arm portion 144b and the rising bent portion 143a.
are in a state where they rotate together in a locked state. When no tape is loaded, both levers 144, 143
is the lug portion 143b of the lever 143 and the pin 146.
The pinch roller 1 rotates in a clockwise direction due to the action of a spring 147 stretched between the pinch roller 1 and the
40 is quite far away from capstan 17. As a result, the cassette loading operation and the cassette front cover opening operation at this time are performed without hitting the pinch roller 140. The lever 142 is connected by a rod 149 to one end of a rotating lever 148 which is pivotally supported on the shaft 28. Since the clockwise rotational position of the rotational lever 148 is limited by the elongated hole 150 of the sub-chassis 6, the clockwise rotational position of the lever 142 is also limited.
When the lever 142 is not loaded with tape, its rising bent portion 142a is the folded bent portion 1 of the lever 143.
By receiving 43b, both levers 14
It serves to determine the clockwise rotation position of 3,144. Further, the lever 143 is connected to an iron core 153 of a solenoid 152 by a link 151. The solenoid 152 is installed at a position where the iron core 153 is pulled out considerably. Link 151
is connected to the lever 143 at a position at a length L of the middle arm.

At the final stage of the above tape loading operation,
The pin 32 of the worm wheel 26 is the rotating lever 1
48 is pushed, and the rotation lever 148 is rotated counterclockwise. In response to this, the lever 142 rotates counterclockwise, and the levers 143 and 144 then fold back to rise from the bent portion 143c and return to the bent portion 142a.
is pushed by and rotates counterclockwise against the spring 147. As a result, the pinch roller 140 reaches a position close to the capstan 17, as shown in FIG. 2, and the iron core 153 is inserted into the solenoid 152. At this time, iron core 153 and solenoid 1
52 is in a state where the iron core 153 can be attracted with a large suction force by the operation of the solenoid 152.

After the pinch roller 140 is in the state shown by the solid line in FIG.
Y It is sucked in _two directions to the stroke end. As a result, the levers 143 and 144 rotate counterclockwise, and the pinch roller 140 presses against the capstan 17, as shown by the two-dot chain line in the same figure, and the lever 143 further rotates in the same direction, causing the pinch roller 140 to press against the capstan 17. The rising bent portion 143a is separated from the other arm portion 144b. In this case, the independent rotation of the lever 143 and the lever 144 is performed against the strong spring 145, but the arm length L is relatively long and the solenoid 1
Since the solenoid 152 operates within a range in which it operates strongly (thereby, the solenoid 152 itself needs to have a small capacity), the above-mentioned independent rotational movement of the lever 144 is reliably performed. The pinch roller 140 is
The lever 144 is pressed against the capstan 17 via the magnetic tape 9 by the counterclockwise rotational force applied by the spring 145.

When the pinch roller 140 presses against the capstan 17 by the operation of the solenoid 152, the movement distance of the pinch roller 140 is small, and the press operation of the pinch roller 140 against the capstan 17 is as follows.
This is done with a small impact and without damaging the magnetic tape 9.

By pressing the pinch roller 140 against the capstan 17, the magnetic tape 9 runs along a predetermined loaded tape path, and a recording or reproducing operation is performed.

Note that by deactivating the solenoid 152 during the recording mode, the pinch roller 140 is
As shown by the solid line in the figure, when the pinch roller 140 moves slightly away from the capstan 17 and operates the solenoid 152 again, the pinch roller 140 moves a distance smaller than the above position and presses against the capstan 17. This allows a so-called continuous shooting operation to be performed conveniently.

If you perform a stop operation during recording or playback mode,
The solenoid 152 is deactivated, the tape loading motor 20 is started, and the worm wheels 26 and 27 rotate in the directions of arrows F and G, and the tape loading motor 20 is started and the worm wheels 26 and 27 are rotated in the directions of arrows F and G. The tape unloading operation is performed by the mechanism operating in the reverse order and direction of loading. The motor 20 stops when the switch lever 120 is rotated by being pushed by the pin 32a and the micro switch 122 is turned off. As a result, the apparatus enters the tape loading/unloading operation completion state (tape non-loading state) shown in FIG. During the tape unloading operation, the tape outside the cassette is wound onto the supply reel or take-up reel and stored in the cassette 10.

In addition, in the above embodiment, the toothed belts 2, 3
Instead of the toothed pulleys 31 and 31a, other mechanisms that do not cause slippage, such as chains and sprockets, may be used.
Alternatively, a perforated film and sprocket can be used.

Further, instead of the guide grooves 7 and 8, a configuration may be provided in which a guide rail or the like is provided.

Furthermore, the band-shaped body also includes wires and the like.

As described above, according to the automatic tape loading device of the present invention, the switch is provided to actively delay the stop of the motor from the time when the tape pull-out member reaches the final position, so that the spring member is always elastically deformed by a predetermined amount. The worm, which has stopped rotating, locks the worm wheel and limits this reversal.
Since there is no slippage between the endless toothed belt and the toothed pulley, the pressing force of the tape pull-out member against the locking member can be stably set at a desired value, and the tape path can be maintained at a predetermined and accurate level. It has the advantage of being easily formed.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the automatic tape loading device according to the present invention when the tape is not loaded (tape loading is completed), and FIG. 2 is a plan view showing the tape loading of the device shown in FIG. 1 is completed. Fig. 3 is a plan view showing the state when the sub-chassis is removed and the mechanism on the main chassis (when the tape is not loaded as shown in Fig. 1)
FIG. 4 is a view from the direction of the arrow shown in FIG. 3 to explain the structure of the toothed belt drive mechanism, and FIGS. 5 and 6 show the guide pole mechanism and connection mechanism, respectively. The first one shows a state in which
7 and 8 are a plan view and a side view, respectively, showing the relationship between the guide pole mechanism and the mechanism that regulates its position when tape loading is completed. , FIG. 9 is a diagram showing the state of the toothed belt drive mechanism section upon completion of the tape loading operation, and FIG. 10 is a diagram showing the shape of each lever constituting the pinch roller mechanism. 1...Guide drum, 2, 3...Toothed belt,
4, 5... Guide pole mechanism, 6... Sub chassis, 7, 8... Guide groove, 9... Magnetic tape, 1
0... Cassette, 13, 15... Vertical guide roller, 14, 16... Inclined guide pole, 17...
Capstan, 18... Main chassis, 20...
... Tape loading motor, 23 ... Worm gear,
26, 27... Worm wheel, 30... Disc, 31... Toothed pulley, 32... Pin, 34...
... Hole, 36 ... Step, 37 ... Arc-shaped plate piece, 38
...Radial step, 39...Coil spring, 50~
53... Guide pulley, 60, 61... Connection mechanism, 62... Block, 65... Connection member, 68
...Elongated hole, 70 ... Placement table, 71 ... Placement plate, 7
2...Vertical pole, 73...Protrusion, 74...Connecting pin, 95...Full-width erasing head, 110...Stopper, 111...Upper V-shaped groove, 112...Lower V-shaped groove, 120 ...Switch lever, 122,
123...Micro switch, 130...Audio control head, 140...Pinch roller.

Claims (1)

[Scope of Claims] 1. A device in which a tape at a predetermined position is pulled out by a moving tape pull-out member and loaded onto a predetermined tape path, wherein the tape pull-out members are connected, and the tape pull-out member moves according to the movement of the tape pull-out member. an endless toothed belt for moving a toothed belt, a toothed pulley around which the endless toothed belt is wound, a worm wheel provided coaxially with the toothed pulley, and a motor provided in mesh with the worm wheel. a worm that is rotated by a worm wheel to rotate the worm wheel; a spring member provided between the worm wheel and the toothed pulley; and a tape drawer member that is fixed at a predetermined position and moves in a tape loading direction. a locking member that locks at the loading completion position; and a locking member that continues to rotate the motor even after the tape pull-out member is moved and reaches a position where it is locked by the locking member, and the spring member is elastically deformed by a predetermined amount. An automatic tape loading device characterized by comprising a switch that rotates the tape until it reaches the end and then stops.