JPS6331869B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a cassette holder locking device that is most suitable for application to, for example, a VTR, and is particularly suitable for inserting a tape cassette into a cassette holder and mounting it at the cassette mounting position using this cassette holder. This invention relates to a cassette holder locking device which is constructed so that a locking piece provided on a cassette holder is locked by a reciprocating lock lever provided at a cassette mounting position.

Conventionally, most of these types of cassette holder locking devices for VTRs mechanically detect the completion of tape unloading and operate a lock release member when the cassette is ejected, and this lock release member operates the lock lever. The cassette holder is moved to the unlocked position to unlock the cassette holder. At this time, it is very easy to operate the lock release member upon completion of unloading by the loading device, but after moving the lock lever to the lock release position with the lock release member, the lock lever is returned to the lock position. If you do not return it, the lock lever will not be able to lock the cassette holder again the next time the cassette is installed. Therefore, conventionally, the above operations have been performed using a very complicated structure.

The present invention was devised to correct the above-mentioned deficiencies, and it is an object of the present invention to provide a cassette holder locking device that is extremely simple in structure and reliable in operation.

An embodiment in which the present invention is applied to a tape loading device for a VTR will be described below with reference to the drawings.

First, the entire tape loading device will be explained with reference to FIGS. 1 to 4.

First, 1 is a tape cassette (hereinafter simply referred to as a cassette), which includes a supply reel 2 and a take-up reel 3.
are housed in parallel, and a magnetic tape (hereinafter simply referred to as tape) 4 is wound and housed between them. Then, as conventionally known, the cassette 1
is horizontally mounted and positioned on the horizontal mechanical board 5 of the VTR main body by a cassette mounting mechanism (not shown) that can be raised and lowered, and the mechanical board 5
A supply reel stand 6 and a take-up reel stand 7 arranged above
Both reels 2 and 3 are engaged with each other. By mounting the cassette, the front cover 9, which had closed the front opening 8 provided on the front surface 1a of the cassette 1, is opened. Note that the bottom surface 1b on the front side of the cassette 1
is provided with a bottom opening 10 having a substantially trapezoidal shape.

Next, reference numeral 13 denotes a rotating head drum (hereinafter simply referred to as drum) to which a rotating magnetic head (not shown) is attached. has been placed.

Next, 14 is a supply side loading device for loading the tape 4 on the supply side of the tape 4 to the drum 13, and 15 is a loading device for loading the tape 4 on the winding side of the tape 4 to the drum 13. This is a loading device on the winding side. and supply side loading device 1
4 has four moving tape guides 16, 17,
18, 19, etc. are used, and one moving tape guide 20, etc. is used in the winding side loading device 15. Note that the winding side loading device 1
5, a pinch roller 21 is configured to move following the tape guide 20. Furthermore, of the four tape guides of the supply side loading device 14, the two tape guides 18 and 19 on the trailing side can be freely changed from a fallen state where they are laid down almost horizontally to a standing state where they are raised at a predetermined angle. It is configured as a rising guide.

Further, on the upper part of the mechanical board 5, there are fixed guides such as a capstan 23, fixed tape guides 24a and 24b, a drum entrance guide 25, and a drum exit guide 26, a full width erasing head 27, an audio erasing head 28, and an audio recording head. Magnetic heads such as the re-purposed CTL head 29 are mounted in predetermined positions either directly or via appropriate mounting members. Note that 30 is a tension regulator pin.

When the unloading of the tape loading device is completed as described above, the tape guides 16 to 20 and the pinch rollers 21 of both loading devices 14 and 15 are respectively moved back to the return position shown by the imaginary lines in FIG. . At this time, tape guide 1
8 and 19 are in a nearly horizontal state.

When this unloading is completed, the cassette 1 is lowered horizontally from above and installed.
However, by attaching the cassette 1, the three tape guides 16, 17, 20 and the pinch roller 21 are inserted into the cassette 1 through the bottom opening 10 of the cassette 1, and the tape guides 16, 17, 20 and the pinch roller 21 are inserted into the cassette 1 through the bottom opening 10 of the cassette 1, and the tape guides 16, 17, 20 and the pinch roller 21 are inserted into the cassette 1 through the bottom opening 10 of the cassette 1. Tape 4 being passed
inserted inside.

Next, after the cassette is installed, the tape guides 16 to 19 of the supply side loading device 14 are placed on the drum 1.
The tape guide 20 and pinch roller 21 of the take-up side loading device 15 start moving counterclockwise in FIG. As a result, loading of the tape 4 is started. That is, the tapes 4 in the cassette 1 are successively hooked by these tape guides 16 to 20, and the tapes 4 are successively pulled out forward from the front opening 8 of the cassette 1 in both left and right directions in FIG. Begins. At this time, two tape guides 1
8 and 19 are successively raised within the cassette 1 as they move, and are successively hooked onto the tape 4.

On the other hand, at this time, the tape guides 16 to 19 of the supply side loading device 14 are connected to the front opening 8 of the cassette 1.
After being pulled out in a horizontal direction parallel to the bottom surface 1b of the cassette 1, it is gradually raised along the outer circumference of the drum 13. As a result, the supply side 4 of the tape 4
After being pulled out horizontally from the front opening 8 of the cassette 1, the tape a is gradually lifted up and wound around the circumferential surface of the drum 13. On the other hand, the tape guide 20 of the winding side loading device 15 is connected to the cassette 1.
It is pulled out horizontally from the front opening 8 of. As a result, the winding side 4b of the tape 4 is simply pulled out from the front opening 8 of the cassette 1 in the horizontal direction.

When these tape guides 16 to 20 and the pinch roller 21 reach the forward movement position shown by the solid line in FIG. 1, the loading of the tape 4 is completed.
The movement of these tape guides 16 to 20 and pinch roller 21 is stopped. And tape 4 is
The supply side 4a is helically wound around the circumferential surface of the drum 13 at a wrapping angle of 180°+α and is passed through the full-width erasing head 27, while the winding side 4b is connected to the audio erasing head 28 and the CTL head 29. The capstan 23 is passed horizontally. At this time, upon completion of the above-mentioned loading, the tension regulator pin 30 is moved from the position shown by the dotted line to the position shown by the solid line in FIG. .

As is conventionally known, when the above-mentioned loading is completed and the record button or play button is pressed,
The pinch roller 21 is pressed onto the capstan 23 as shown by the dotted line in FIG.
3, the tape 4 starts running, is fed out from the supply reel 2, passes through the full-width erasing head 27, and is transferred to the drum 13, which is already being driven to rotate.
The recording medium passes through the circumferential surface of the recording medium, passes through the audio erasing head 28 and the CTL head 29, and is then run to be wound onto the take-up reel 3 for desired recording or reproduction. Note that when the eject button is pressed after recording or playback, the tape guides 16 to
20 and the pinch roller 21 are each returned to their original return positions, and the tape 4 is unloaded. After the unloading is completed, cassette 1 is ejected.

Incidentally, in this tape loading device, the gap _h1 between the bottom surface 1b of the loaded cassette 1 and the mechanical board 5 is configured to be extremely small, and as a result, when the cassette 1 is opened, it protrudes upward from the top surface 1a. Height h ₂ required to open the front cover 9
The height _h3 necessary for mounting the cassette 1 on the mechanical board 5, including the height h3, is extremely small. Furthermore, the maximum height h ₄ of the tape loading device above the mechanical board 5 (the maximum height is when the tape guide 16 reaches the forward movement position) is set so that it is approximately within the height h ₃ above. It is possible to construct a very small (so-called thin) VTR.

In addition, the length _l1 in the front-rear direction of this tape loading device is configured to be extremely small, and the gap _l2 between the front surface 1a of the cassette 1 and the drum 13 is configured to be extremely small. It is possible to construct a very small VTR.

Furthermore, the horizontal width _w1 of this tape loading device is configured to completely fit within the horizontal width _w2 of the cassette 1, making it possible to construct a VTR with a very small horizontal width.

In summary, with this tape loading device, it is possible to construct a very compact VTR with small height, depth, and width.

Next, details of each part of this tape loading device will be explained.

First, FIG. 5 shows the entire plane in a state where loading of the tape 4 is completed, and the mechanical board 5 is shown.
Various parts are attached to the top. That is, a rising guide body 33 is provided between the cassette 1 and the drum 13, and is inserted into the bottom opening 10 of the mounted cassette 1, and guides the rising movement of the two tape guides 18 and 19. ing.
A pair of positioning plates 34 and 35 are provided at each of the forward movement positions of the two tape guides 18 and 19, respectively, to define their inclination states. drum 13
A drive device 36 that commonly drives both loading devices 14 and 15 is provided on one side of the device. A pinch roller crimping device 3 is provided on one side of the drive device 36.
7 is provided. A pair of tape sliding guides 38, 39 are provided above the heads 28, 29 and the drum exit guide 26. A tension detection device 40 is provided beside the movement path of the supply side loading device 14. A cassette holder locking device 41 is provided at the cassette mounting position.

Next, the supply side loading device 14 and related structures will be explained with reference to FIGS. 6 to 28.

First, as shown in FIGS. 6 and 7, the mechanical board 5
A guide block 44 made of, for example, synthetic resin is attached to the top. The guide block 44 has a substantially U-shaped cross section and is curved clockwise along the outer periphery of the drum 13 from a position below the bottom opening 10 of the mounted cassette 1. Further, as shown in FIG. 9, the cassette side end 45a of this guide block 44 has a horizontal shape parallel to the bottom surface 1b of the cassette 1, and is extremely close to the mechanical board 5, and the drum side end 45b is parallel to the mechanical board 1b. 5 to a predetermined height. Note that the intermediate portion 45c of the top plate 45 is gently sloped or curved. And the top plate 45
A guide groove 46 is provided along the substantially central portion thereof. That is, this guide groove 46
After being pulled out horizontally from a position below the bottom opening 10 of the drum 13, the drum 13 is gradually raised along the outer periphery of the drum 13 and extended clockwise. A guide plate 47 made of a metal plate is disposed on the drum-side end 45b of the upper plate 45 of the guide block 44, and is connected flush with the upper plate 45. This guide plate 47 is connected to the mechanical board 5. It is at a predetermined height position and inclined at a predetermined angle. This guide plate 47 has a guide groove 46.
A guide groove 49 connected to is provided.

Next, as shown in FIGS. 8 and 9, the mechanical board 5
On the upper surface, at the lower position of the guide block 44,
A ring 51 eccentric to the drum 13 is provided. This ring 51 is supported by, for example, three flanged guide rollers 52 pivotally mounted on the mechanical board 5, and is configured to be horizontally rotatable on the upper surface of the mechanical board 5. And this ring 51
An outer gear 53 is provided on the outer periphery over a predetermined angular range.
is provided. As shown in FIGS. 7 and 10, on the opposite side of the guide block 44, a thin guide holding plate 54 made of, for example, a stainless steel plate extends in a circle along the top of the link 51 following the top plate 45. It is curved in an arc and mounted horizontally.

Next, as shown in FIGS. 11 to 15, the tape guides 16 and 17 are mounted on a movable table 56 which is moved on the top plate 45 of the guide block 44 while being guided by a guide groove 46. This moving table 56 has a protrusion 58 that is curved along the substantially central portion of the lower surface and is integrally provided to be moved within the guide grooves 46 and 49, and is slid on the upper surface plate 45. Upper block 59 and upper plate 4
5, and the protrusion 5 of the upper block 59
A comparison in which a lower block 61 is fixed to the lower surface of 8 with two setscrews 60, and one end is inserted between the protrusion 58 and the lower block 61, and they are fixed together by tightening with setscrews 60. The guide support plate 62 is made of an elastic guide support plate 62 made of a thick metal plate.

A support shaft 63 is installed vertically on the tip of the guide support plate 62 of the movable table 56. A compression coil spring 64 is inserted into the lower end of this support shaft 63, and a lower flange 65 is inserted into the upper part.
and a sleeve 66 are inserted vertically slidably along the support shaft 63. Further, an upper flange 65 is screwed to the upper end of the support shaft 63. That is, the upper flange 67 is screwed and attached to a threaded shaft portion 69 provided at the upper end of the support shaft 63 through a screw hole 68 provided at its lower end, and is brought into contact with the upper end of the sleeve 66 . A small-diameter screw hole 70 communicating with the screw hole 68 is provided on the upper end side of the upper flange 67, and a fixing screw 71 screwed into this screw hole 70 is pressed against the upper end surface of the support shaft 63. It is configured as follows.

By the way, the tape guide 16 is connected to the rotating roller 7.
2, with both upper and lower flanges 67, 6
It is rotatably inserted into the outer periphery of the sleeve 66 between 5 and 5. That is, a cylindrical portion 73 slightly shorter than the length of the sleeve 66 is integrally provided on the inner periphery of the rotating roller 72, and both upper and lower end surfaces of the cylindrical portion 73 are the upper and lower ends of the cylindrical portions 67a, 65a of the upper and lower flanges 67, 65. The rotating roller 7 is facing the surface.
2 is rotatably inserted into the outer periphery of the sleeve 66. Note that a driver insertion groove 74 is provided on the upper surface of the upper flange 67.

The height adjusting device 75 of the tape guide 16 is configured with the above configuration, and by adjusting the screwing amount of the upper flange 67 into the screw shaft portion 69,
By moving and adjusting the upper flange 67 in the vertical direction with respect to the support shaft 63, the lower flange 65
The tape guide 16 is adjusted to move vertically along the support shaft 63 (in the direction of arrow A in FIG. 14) in cooperation with the coil spring 64 that constantly presses the sleeve 66 upward. It is composed of After this adjustment, by tightening the fixing screw 71 to the upper end surface of the support shaft 63, the upper flange 67 is fixed, and the tape guide 16 is defined at the adjusted height position.

Further, a screw hole 77 is provided in the center of the tip of the upper block 59, and an adjustment screw 78 is screwed into this screw hole 77 from above and penetrates downward, and the lower end of the adjustment screw 78 supports the guide. It is in contact with the upper surface of the tip end side of the plate 62. Then, on the rear side of this adjustment screw 78, the upper block 59
There is an upward slope 7 on the lower surface of the tip of the protrusion 58.
9 is provided. Further, a notch 80 is provided in the center of the tip of the lower block 61.
A downward slope 81 facing the slope 79 and having a reverse slope is provided on the upper surface of the end of the notch 80 on the side of the closed portion.

The tilt adjustment device 82 of the tape guide 16 is configured with the above configuration, and the adjustment screw 78
As a result of this adjustment, the tip side of the guide support plate 62 swings (bends) in the vertical direction against its elasticity within the vertically open V-shaped space between the upper and lower slopes 78 and 81. As a result, the tape guide 16 is tilted in the direction of arrow B in FIG. 14.

The tape guide 17 is formed of a guide pin, and is installed on the rear end of the upper block 59 at a predetermined angle.

Further, on the upper surface of the lower block 61, three semicircular arc-shaped protrusions 84a to 84c are integrally provided on both left and right sides of the protrusion 58 of the upper block 59 and at both ends in the front and rear direction. Further, a pair of upward slopes 85 are provided on the lower surface of the left and right sides of the tip side of the lower block 61. On the other hand, a lock pin 86 is provided on the lower side of the guide plate 47 and is arranged below the guide groove 49 and arranged to cross the guide groove 49 in a direction perpendicular to it.

With the above configuration, the tape guides 16, 17
A lock mechanism 8 that locks the lock in the forward movement position shown in FIG.
7, and when the moving table 56 is moved along the guide groove 49 in the direction of arrow C in FIG. 13 by a drive device to be described later and reaches the forward movement position shown in FIG. As shown in the figure, both slopes 85 of the lower block 61 ride on the lock pin 86. Then, due to the wedge effect of both slopes 85 and the lock pin 86, the lower block 61 is pushed obliquely upward in the direction of arrow D in FIG. It is press-fitted to the lower surface of the guide plate 47 at both sides with a biting action. As a result, when both tape guides 16 and 17 reach the forward movement position shown in FIG. 1, the movable table 56 is stably fixed by the wedge effect, and no wobbling occurs in the fixed state.

Next, as shown in FIGS. 16 and 17, the ring 51 and the rear end of the movable table 56 are connected by a connecting rod 89 disposed obliquely between them. This connecting rod 89 is composed of a pin 90 and a pipe 91 made of, for example, synthetic resin, and the tip of the pin 90 is inserted into a hollow part 92 of the pipe 91 so as to be able to slide freely in the axial direction. ing.
A pair of triangular retaining protrusions 93 are integrally provided on both sides of the tip end of the pin 90, and these protrusions 93 are inserted into a pair of elongated holes 94 provided on both sides of the pipe 91. It is slidably loosely fitted. At this time, a pair of slits 95 are provided at one end of the pipe 91, each having a phase shift of approximately 90 degrees with respect to the elongated holes 94. Both protrusions 9 resist the elasticity in the diametrical direction of the tip of the pipe 91.
3 is inserted into the pipe 91 and then into both elongated holes 94. and pin 90
A pair of flange portions 96 are provided on the other end side, and a compression coil spring 97 is inserted on the outer periphery of the pin 90 between the flange portions 96 and the end of the pipe 91. Therefore, the coil spring 97 presses the pin 90 and the pipe 91 in the direction of removal, and both projections 93 prevent the pin 90 and the pipe 91 from coming off. A pair of oval-shaped protrusions 98 are integrally provided on both sides of the other end of the pin 90 and are perpendicular to the axis of the pin 90. A pair of C-shaped holes 100 in the bracket 99 provided
It is rotatably inserted inside. In this case, both C
The opening width t ₁ of the opening 100a provided on the upper surface side of the shaped hole 100 is equal to the thickness t ₂ of the flat side of both oval-shaped protrusions 98.
Larger structure. As a result, both oval-shaped protrusions 98 are formed into openings 100 as shown by imaginary lines in FIG.
After vertically inserting the pin 90 into both C-shaped holes 100 from above from a, by tilting the pin 90 at a predetermined angle or more, the oval-shaped protrusions 98 are inserted into both C-shaped holes 100.
I can't get rid of it. Therefore, the pin 90, ie, one end of the connecting rod 89, can be attached to the bracket 99 with a single touch. Furthermore, in the attached state, the connecting rod 89 can freely rotate around the centers of both C-shaped holes 100.

On the other hand, a ball 101 is integrally provided at the other end of the pipe 91, and is inserted into a ball receiving portion 102 provided at the rear end of the lower block 61 of the moving table 56.
A ball joint 103 is configured. As shown in FIG. 11, the ball receiving portion 102 is configured to be split in the left and right direction, and the split piece 104 is screwed to the lower block 61 with a set screw 105.

Next, as shown in FIGS. 18 to 20, the two tape guides 18 and 19 are both constructed of guide pins. Since both tape guides 18 and 19 are mounted on the ring 51 using the same mounting structure, only one tape guide 18 will be described here.

That is, the tape guide 18 has a fulcrum shaft 10 that is horizontal to the bracket 107 provided on the ring 51.
8, it is pivotably supported in the vertical direction. The tape guide 1
8 is rotated clockwise in FIG. 20, that is, upwardly. On the other hand, a leaf spring 112 is screwed onto the bracket 107 at one end thereof by a set screw 113. A free end 112a of the leaf spring 112 extends from the rear side to a position near the pivot end of the tape guide 18.
And the tape guide 18 is connected to the coil spring 11.
1, when the tape guide 18 rises from the fallen position shown by the imaginary line in FIG. 20 to the raised position shown by the solid line (when rotated clockwise).
A stopper projection 114, which is integrally provided on the rear surface of the pivot end of the tape guide 18, comes into contact with the tip 112a of the leaf spring 112, thereby restricting rotation of the tape guide 18. Note that leaf spring 11
An adjustment screw 115 is attached to the second part, and is screwed to the bracket 107 through the adjustment screw 115. By adjusting the adjustment screw 115, the tip 112a of the leaf spring 112 is moved in the vertical direction against elasticity. The swing is adjusted to Through this adjustment, the inclination angle of the tape guide 18 at the rising position shown by the solid line in FIG. 20 can be adjusted.

By the way, when both tape guides 18 and 19 are moved back to the return position shown in FIG. 1, they are pulled under the guide holding plate 54 as shown in FIG. They are held down by a guide holding plate 54 and are laid down almost horizontally against the coil springs 111, respectively. When the aforementioned loading of the tape 4 starts, the ring 51 is rotated clockwise in FIG. 54
While successively coming out of the position a, the coil springs 111 successively raise them to the rising position shown by the solid line in FIG. 20.

Next, as shown in FIGS. 21 to 24, the rising guide body 33 is made of, for example, synthetic resin, and has a substantially triangular planar shape and a substantially U-shaped cross section. A guide passage 117 is provided inside. Both tape guides 1 are attached to the ceiling of this guide guide passage 117.
An arc-shaped guide groove 118 is provided for guiding the tips 18a and 19a of the guide grooves 8 and 19, and a cushion plate 119 such as an elastic synthetic resin plate is attached to one end of the guide groove 118. It is installed equally.

By the way, as described above, when the cassette 1 is installed, the rising guide member 33 is inserted into the cassette 1 through the bottom opening 10 of the cassette 1 and inside the tape 4, as shown in FIGS. 22 and 23. In this state, the aforementioned loading of the tape 4 is started, and as the ring 51 rotates clockwise in FIG.
9 starts moving from the backward movement position shown in Figure 1 and moves to the 22nd position.
The tape is moved in the direction of arrow E in the figure, passes under the tape 4 one after another, and enters the cassette 1 through the bottom opening 10 of the cassette 1. Then, both tape guides 18 and 19 stand up one after another inside the tape 4 in the cassette 1, hook the tape 4 one after another, and move the tape 4 into the cassette 1.
The cassettes 1 are sequentially pulled out from the front opening 8 of the cassette 1.

However, at this time, both tape guides 18 and 19
Until these tips 18a, 19a pass under the tape 4, they are held down by the guide holding plate 54 to the fallen position as shown in FIG. And the tips 18a, 1 of both tape guides 18, 19
After the tape 9a passes under the tape 4 one after another, the tape guides 18 and 19 sequentially slip out from the tip 54a of the guide holding plate 54 and are successively raised up inside the tape 4 in the cassette 1 by the coil spring 111 as described above. climb. During this rise, the tips 18a, 19a of both tape guides 18, 19 sequentially contact the lower surface of the cushion plate 119, and after the impact is buffered, the tips 18a, 19a
enters into the guide groove 118 one after another. After that, the tips 18a, 19a of both tape guides 18, 19
is guided by the guide groove 118, and its tip 18a,
The height and movement trajectory of 19a are regulated. Then, eventually the tips 18 of both tape guides 18, 19
a and 19a sequentially come out of the guide groove 118,
Both tape guides 18 and 19 are successively raised to the rising position shown by the solid line in FIG. 20, and the tape 4 is successively hooked from the inside. However, at this time, the tips 18a and 19 of both tape guides 18 and 19
Since the position at which tape a slips out of the guide groove 118 and rises is at the front opening 8 of the cassette 1, the tip 18 of both tape guides 18 and 19 is caused by the rise.
a, 19a of the front cover 9 of the cassette 1, so that the lower edge 9a of the front lid 9 of the cassette 1 is not
You can safely pass under the

In short, the rising guide body 33 maintains the rising posture when both tape guides 18 and 19, which have passed under the tape 4 and entered the inside of the tape 4 in the cassette 1, stand up one after another inside the tape 4. the ends 1 of both tape guides 18 and 19.
To safely and reliably draw out a tape 4 using both tape guides 18 and 19 while preventing a failure caused by accidental collision of 8a and 19a with the inside of a front cover 9 of a cassette 1. I will guide you so that you can do it.

Next, as shown in FIGS. 25 and 26, the positioning plates 34 and 35 are arranged at the forward movement positions of the two tape guides 18 and 19 shown in FIG. 1. That is, both positioning plates 34 and 35 are screwed horizontally to the upper end of the mounting block 121 provided on the mechanical board 5 with set screws 122 and 123, respectively, and these are screwed to the upper end of the mounting block 121, respectively. An integrally provided positioning dowel 124,
125 through dowel holes 126 and 127, respectively, for positioning.

By the way, when both tape guides 18 and 19 are in the upright position as shown by solid lines in FIG. height of
h ₁₀ is the tip 19a of the trailing tape guide 19
The height h11 between the upper end surface of the mechanical board 5 and the mechanical board 5 is defined to be lower than the height _h11 , and a step _h12 is provided between them. One positioning plate 34 is installed horizontally on the mechanical board 5 at a height h _{13 that is slightly lower than the rising height h 10 of} the preceding tape guide 18, and the other positioning plate 35 is installed horizontally on the mechanical board 5. It is mounted horizontally on the mechanical board 5 at a height _h14 that is slightly lower than the rising height _h11 of the guide 19 and slightly higher than the rising height _h10 of the preceding tape guide 18. And these two positioning plates 34, 35
are the tips 18 of both tape guides 18 and 19, respectively.
Notch 12 for guiding and positioning a, 19a
8,129 are provided.

During the loading of the tape 4 described above, as the ring 51 rotates clockwise in FIG. 8, both tape guides 18 and 19 move in the direction of arrow F in the rising state shown by the imaginary line in FIG. It is moved horizontally to these forward movement positions.
At this time, both tape guides 18 and 19 are projected above the guide groove 46 of the guide block 44 from the time when they stand up in the cassette 1 as described above. The leading tape guide 18 passes under the positioning plate 35 before reaching its forward position.

Immediately before both tape guides 18 and 19 reach their forward movement positions, these tips 18a and 1
9a is the notch 128 of both positioning plates 34, 35,
129, and when it reaches its forward position, the tips 18a, 19a of both tape guides 18, 19
has both notches 128,1 as shown by dotted lines in FIG.
The closed ends 128a and 129a of 29 are brought into contact with each other.

However, after the lever, the ring 51 is indicated by the arrow F in FIG.
The ring 51 moves slightly in the direction and stops, and the movement of the ring 51 at this time causes both tape guides 1
Tips 18a and 19a of 8 and 19 are both positioning plates 3
4 and 35, it is relatively pushed in the opposite direction of the arrow F direction. As a result, both tape guides 18 and 19 are rotated clockwise in FIG. 26 about the fulcrum shaft 108, and when the ring 51 stops, they are each regulated to predetermined angular positions shown by solid lines in FIG. position. That is, both tape guides 18, 19
These tips 18a, 19a are the closed ends 1 of both notches 128, 129 of both positioning plates 34, 35.
Until they come into contact with the closed ends 128a and 129a, they are held in the raised position shown by solid lines in FIG.
The moment it comes into contact with a, 129a, it is further rotated clockwise in FIG. At this time, the protrusions 114 of both tape guides 18 and 19 are connected to the leaf spring 11.
In order to press down the tip 112a of leaf spring 1
12 bends against its elasticity as shown by the dotted line in FIG.
2 to a predetermined angular position shown in dotted lines in FIG. After the ring 51 has stopped, the repulsive force of the leaf spring 112 forces the tape guides 18 and 19 to rotate counterclockwise in FIG. The tape guides 18 and 19 are received by the closed ends 128a and 129a of the notches 128 and 129, and are positioned extremely stably in a so-called both-end supported state in which both the upper and lower ends of the tape guides 18 and 19 are supported.

Next, as shown in FIG. 27, a loading completion detection lever 132 which also serves as a lock lever is rotatably supported via a fulcrum shaft 133 at a predetermined position beside the outer periphery of the ring 51 on the upper part of the mechanical board 5. .
The detection lever 132 is rotated clockwise by a tension coil spring 134 stretched between the detection lever 132 and the mechanical board 5.
A roller 135 pivotally attached to one end of the ring 51
is constantly pressed against the outer circumferential surface 136 of. Further, a loading completion detection switch 137 is provided on the mechanical board 5 at a position near the detection lever 132, and the operating lever 138 of the actuator 137a is connected to the fulcrum part 13 provided on the mechanical board 5.
It is rotatably provided around 9. The operating lever 138 is rotated counterclockwise by a tension coil spring 140 that is stretched between it and the mechanical board 5, and its tip 138a is integrally provided with a part of the detection lever 132. protrusion 1
41 at all times.

On the other hand, a notch 142 for locking the roller 135 is provided in a part of the outer peripheral surface 136 of the ring 51. When the unloading of the tape 4 is completed, the rollers 135 are pushed up onto the outer circumferential surface 136 of the ring 51, as shown by the imaginary lines in FIG. Therefore, at this time, the detection lever 132 is rotated counterclockwise against the coil spring 134, and its protrusion 141 rotates the operating lever 138 clockwise against the coil spring 140, causing the detection switch 137 to rotate. is OFF
It is becoming a state. Then, when the loading of the tape 4 described above is started, the ring 51 moves to the arrow G.
When the loading is completed, the notch 142 reaches the position shown by the solid line in FIG. 27. At this time, as shown by the solid line in FIG.
The rollers 135 fall into the notches 142, and the ring 51 is locked at its loading complete position. When the detection lever 132 is rotated clockwise, the protrusion 141 is moved to the tip 138a of the operating lever 138.
run away from As a result, the operating lever 138 is rotated counterclockwise by the coil spring 140, pushing the actuator 137a of the detection switch 137, and the detection switch 137 is
The switch is switched to the ON state and the completion of unloading of the tape 4 is detected.

In this state, when the aforementioned unloading of the tape 4 is started and the ring 51 starts to move backward in the direction opposite to the direction of the arrow G, the rollers 135 are again inserted into the notch 142 as shown by the imaginary line in FIG. The outer peripheral surface 13 of the ring 51 from the inside via the slope 142a
6 pushed up. In connection with this, the detection lever 132 and the operating lever 138 are moved back to the position of the imaginary line, and the detection switch 137 is switched to the OFF state.

Next, as shown in FIG. 28, both tape guides 1
An unloading completion detection lever 144 is provided on the side of the moving path of the movable table 56 in the vicinity of the return position shown in FIG. The detection lever 144 is rotatably supported on the upper surface of a part of the guide block 44 via a fulcrum shaft 145, and is rotated clockwise by a tension coil spring 146 stretched between the detection lever 144 and the guide block 44. It is rotationally energized. And this detection lever 14
4, an unloading detection switch 147 is provided on the mechanical board 5, and an operating lever 148 of an actuator 147a thereof is provided rotatably around a fulcrum 149 provided on the mechanical board 5. There is. And this operating lever 148
is rotated counterclockwise by a tension coil spring 150 stretched between it and the mechanical board 5, and its tip 148a is connected to a pin 151 integrally provided at one end of the detection lever 144. It is designed so that Note that a pin 152 is integrally provided on the lower surface of the tip 144a of the detection lever 144, and the pin 152 is inserted into a long hole 153 provided in the guide block 44. It is configured so that rotation in the clockwise direction is restricted.

On the other hand, a projection 154 is integrally provided on a part of the inside of the upper block 59 of the movable table 56. Then, when the aforementioned tape 4 is unloaded, both tape guides 16 and 17 are moved back to the return position shown in FIG. 1, and the moving table 56 reaches the position shown by the solid line in FIG. The protrusion 154 contacts and pushes the tip 144a of the detection lever 144. As a result, as shown by the solid line in FIG. 28, the detection lever 144 is rotated counterclockwise against the coil spring 146, and its pin 151 escapes from the operating lever 148. and operation lever 14
8 is rotated counterclockwise by the coil spring 150 and pushes the actuator 147a of the detection switch 147.
7 is switched to the ON state, and the completion of unloading of the tape 4 is detected. As shown in FIG. 28 by virtual lines and dotted lines,
When the moving table 56 is moved in the direction of the arrow H or I from the position indicated by the solid line, the protrusion 154 separates from the tip 144a of the detection lever 144 at that moment. Then, as shown by the imaginary line in FIG.
is rotated clockwise by the coil spring 146, and the pin 151 contacts and pushes the tip 148a of the operating lever 148, so the operating lever 148 is rotated clockwise against the coil spring 150. is detected, the detection switch 147
It is configured to be switched to the OFF state.

According to the supply side loading device 14 configured as described above, when loading the tape 4 described above, the ring 51 is rotated clockwise in FIG. 8, and as the ring 51 rotates, the moving stage 56 is pushed by the connecting rod 89.
The moving table 56 moves on the top plate 45 while being guided by the guide groove 46 of the guide block 44, and the moving table 56 moves the tape guide 16,
17 is moved from the backward movement position shown in FIG. 1 to the forward movement position, and loading of the supply side 4a of the tape 4 is performed. At this time, as the ring 51 rotates, the tape guides 18 and 19 pass under the tape 4 in the cassette 1 from the fallen state as shown in FIG. , the tapes 4 are successively raised inside the cassette 1, and the tapes 4 are sequentially hooked and moved to the forward movement position shown in FIG.

At this time, in the connecting rod 89 portion, the driving force of the ring 51 is transmitted from the bracket 99 to both oval projections 98, pin 90, flange portion 96, coil spring 97, pipe 91, ball 101, ball joint 10.
3 to the moving table 56, and eventually the moving table 5
The coil spring 97 is compressed in accordance with the load of 6, and the movable table 56 is pushed through its repulsive force.

Furthermore, while the ring 51 is rotated horizontally on the mechanical board 5 while drawing a circular orbit, the moving table 5
6 is moved along a curved trajectory that does not match the circular trajectory regulated by the guide groove 46 of the guide block 44, and is gradually raised along the inclination or curvature of the top plate 45 of the guide block 44. go. However, one end side of the connecting rod 89 has both oval-shaped protrusions 98 that connect the bracket 9 of the ring 51.
9 is rotatably supported in both C-shaped holes 100, and the other end is pivotally supported to the moving table 56 by a ball joint 103, so that as the moving table 56 moves, the connecting rod While the movable table 89 is gradually tilted upward, the movable table 56 can be pushed extremely smoothly.

The ring 51 and the movable table 56 are connected by the connecting rod 89 as described above, the movable table 56 is completely separated from the rotation path of the ring 51, and the movable table 56 is connected to the guide groove of the guide block 44. 46 and the inclined or curved surface of the top plate 45, the moving path of the moving table 56 can be arbitrarily and freely set. You can. In particular, the cassette-side end 45a of the top plate 46 of the guide block 44 is horizontal, and the movable table 56 can be moved horizontally in this portion. The tape guide 16 contacts the tape 4 in the cassette 1 in a state perpendicular to the center of the tape 4 and parallel to the surface of the tape 4, and twists the tape 4 to twist the tape 4. The tape 4 can be pulled out from the cassette 1 extremely safely and smoothly without applying any unreasonable force to the tape 4.

When the tape guides 16 and 17 reach the forward movement position shown in FIG. Therefore, both slopes 85 of the movable table 56 are pressed against the lock pin 86 of the lock mechanism 87. The three protrusions 84a to 84c are pressed against the lower surface of the guide plate 47 by the wedge effect described above, and the movable table 56 is extremely stably fixed in a three-point supported state.

On the other hand, together with the tape guides 16 and 17, the tape guides 18 and 19 also reach the forward movement position shown in FIG.
35, the tapes 4 are positioned at predetermined angles, and loading of the supply side 4a of the tape 4 is completed.

At the same time as this loading is completed, the roller 135 of the loading completion detection lever 132 falls into the notch 142 of the ring 51, and the ring 51 is locked and stopped at that position, and at the same time, the loading completion detection switch 137 stops the loading. Completion is detected.

In addition, in the above-mentioned loading completion state, the tape guide 16 is perpendicular to the center of the tape on the supply side 4a of the tape 4 that passes through the full-width erasing head 27 and the drum entrance guide 25 to the circumferential surface of the drum 13. The tape guide 16 is set at a predetermined angle parallel to the surface of the tape, but when the loading is completed, that is, the tape 4 has passed, the height adjustment device 75 and the tilt adjustment device 82 described above are used to adjust the height of the tape guide 16. Freely adjust height and tilt
And it can be done extremely easily.

Next, when unloading the tape 4, the ring 51 is rotated counterclockwise in FIG.
is pulled back by the connecting rod 89. Then, the movable table 56 is transferred from the guide plate 47 to the guide block 44, and is moved in the opposite direction to the loading direction, and returned to the return position shown in FIG. 1, so that the supply side 4a of the tape 4 is unloaded. Further, as the ring 51 rotates, the tape guides 18, 1
9 is also moved in the opposite direction during loading, and the first
It is moved back to the return position shown in the figure.

At this time, at the connecting rod 89 portion, both protrusions 93 of the pin 90 are hooked onto one end of the elongated hole 94 of the pipe 91, and the pipe 91 is rigidly pulled by the pin 90. Become. Contrary to the loading time, the connecting rod 89 is gradually brought down horizontally as the moving table 56 moves back.

In addition, contrary to the loading process, the tape guides 18 and 19 are sequentially guided by the rising guide 33 and then sequentially pressed by the guide holding plate 54, so that the tape guides 18 and 19 are brought down almost horizontally against the coil springs 111, respectively. Then, the tape 4 passes under the tape 4 one after another and is successively drawn under the guide holding plate 54.

When the tape guides 16 to 19 each reach the return position shown in FIG. Completion detection switch 147 detects the completion of unloading.

Next, the take-up side loading device 15 and related structures will be explained with reference to FIGS. 29 to 38.

First, as shown in FIGS. 29 to 31, the tape guide 20 and the pinch roller 21 are mounted on a movable table 157 that is horizontally moved on the mechanical board 5. This movable table 157 has a pair of upper and lower slide plates 1 each made of a band-shaped plate curved in an arc shape.
58 and 159, and the lower slide plate 158, which is a moving member, is guided by a plurality of sliding guides 160 molded from, for example, synthetic resin and mounted on the mechanical board 5 in its longitudinal direction, i.e. It is configured to be slid horizontally in an arcuate direction. Further, the upper slide plate 159 is arranged horizontally and parallel to each other above the lower slide plate 158. The upper slide plate 159 is engaged with two guide pins 161 and 162 provided on the lower slide plate 158 through a pair of long arc-shaped holes 163 and 164. arc direction,
That is, it is configured to be slidable in the longitudinal direction. And a pin 165 provided on the lower slide plate 158
The upper slide plate 1 is
59 is biased to slide in the direction of arrow J on the lower slide plate 158, and one ends of the elongated holes 163, 164 abut against the guide pins 161, 162 to restrict sliding. Note that the pin 165 and the coil spiral 166 are arranged in an arc-shaped elongated hole 167 provided in the upper slide plate 159. A rack 168 is attached to the inner side of the upper slide plate 159.
is provided.

On the other hand, the tape guide 20 is
It is composed of a rotating roller 170 similar to
The lower slide plate 158 is rotatably attached to a support shaft 171 installed vertically in the upper part of the lower slide plate 158 near the rear end. Note that this tape guide 20 is also provided with a height adjustment device 172 similar to the height adjustment device 75 described above.

Further, the pinch roller 21 is rotatably supported on a support shaft 175 that is vertically attached between the upper and lower ends of a pinch roller lever 174 that is approximately U-shaped. It is rotatably attached to a fulcrum shaft 176 provided on the rear end of the shaft. The pinch roller lever 174 is rotated clockwise in FIG. Stopper protrusion 178
Rotation is regulated by contacting with.

And tape guide 20 and pinch roller 21
is moved back to the return position shown in FIG. The lower slide plate 158 is moved horizontally on the mechanical board 5 while being guided by a plurality of guides 160. The tape guide 20 and the pinch roller 21 are moved back to the forward movement position shown in FIG. 1 by this moving table 157. Note that when the moving table 157 is moved back in the direction of arrow J, the upper slide plate 15
One ends of both long holes 163 and 164 of 9 are brought into contact with both guide pins 161 and 162, and the lower slide plate 158
will be pushed and moved rigidly.

Next, as shown in FIGS. 32 and 33, a conical portion 180 is provided at the upper end of one guide pin 161 of the movable table 157. On the other hand, the moving table 157
A lock plate 181 is provided at a position where the guide pin 161 is stopped at the forward movement position. This lock plate 181 straddles the moving path of the moving table 157,
It is mounted horizontally on the mechanical board 5 via a support stand 182. This lock plate 181 is integrally provided with an oblique side portion 183.

With the above configuration, the tape guide 20 is
A locking mechanism 184 is configured to lock in the forward movement position shown in the figure, and when the moving table 157 is moved in the direction of arrow K as described above and reaches the forward movement position shown in FIG. cone-shaped portion 180 of
The movable table 157 is fixed to the lower surface of the oblique side portion 183 of the locking plate 181 by a wedge effect. However, at this time, the driving force of the moving table 157 in the direction of arrow K is transferred from the upper slide plate 159 to the coil spring 1.
66 to the lower slide plate 158, the guide pin 161 is connected to the coil spring 1.
It bites into the lower surface of the oblique side part 183 through the tensile repulsion force of 66.

Next, as shown in FIGS. 34 to 38, the pinch roller crimping device 37 is disposed at a position opposite to the capstan 23 in the forward movement position of the pinch roller 21 shown in FIG. That is, a pair of upper and lower pressure levers 186 and 187 are rotatably supported on the mechanical board 5 via a common fulcrum shaft 188. Rollers 189 and 190 are pivotally mounted on the upper and lower surfaces of the tip sides of both of these pressure bonding levers 186 and 187, respectively. Note that these rollers 189 and 190 are the upper and lower pieces 174a and 17 of the pinch roller lever 174.
4b, and is arranged at the same height position as these. The tip ends of both crimping levers 186 and 187 are connected by a connecting shaft 191, and a link 192 is rotatably inserted into the connecting shaft 191. This link 192 and another link 193 are relatively rotatably connected by a connecting pin 194, and the other end of the other link 193 is connected to the intermediate portion of the limiter lever 195 via a connecting pin 196 so as to be relatively rotatable. connected.
Note that one end of the limiter lever 195 is connected to the mechanical board 5.
It is rotatably supported via a fulcrum shaft 198 on a support stand 197 provided above. The other end of the limiter lever 195 and the lock plate 1
Spring force adjustment plate 199 installed on 81
A tension coil spring 20 stretched between
0, the limiter lever 195 is urged to rotate counterclockwise in FIG. Note that this limiter lever 195 is configured to be brought into contact with a stopper protrusion 201 provided integrally on the adjustment plate 199 to restrict its rotation.

On the other hand, a plunger solenoid (hereinafter simply referred to as plunger) 202 is mounted on the mechanical board 5 via a plurality of supports 203.
A connecting rod 206 that is connected to the suction rod 204 via a connecting pin 205 so as to be relatively rotatable is connected to the connecting pin 1.
94 for relative rotation. In addition, 20
7 is a compression coil spring for reciprocating the suction rod 204.

According to this pinch roller crimping device 37, first, when the movable table 157 is moved backward to the backward movement position, the lower roller 190 is on the opposite side of the upper slide plate 159 from the rack 168, as shown in FIG. It is pressed against the outer side surface, and both the upper and lower pressing levers 186, 187 are in a state where they are pressed clockwise in FIG. 36. Next, when the movable table 157 is moved forward to the forward position, the lower roller 190 comes off the upper slide plate 159 and becomes free, as shown in FIG. At the same time, both the upper and lower rollers 189 and 190 come into contact with the side surfaces of the upper and lower pieces 174a and 174b of the pinch roller lever 174.
Next, in this state, the plunger 202 is excited,
The suction rod 204 is attracted against the coil spring 207. Then, the connecting pin 194 is pulled by the connecting rod 206 in the direction of the arrow L in FIG.
87 and limiter lever 195 are rotated in the direction of arrow O and the direction of arrow P, respectively. As a result, the coil spring 200 is pulled as shown in FIGS. 34 and 38, and the repulsive force of the coil spring 200 causes the upper and lower rollers 189, 19 of the upper and lower crimping levers 186, 187 to
0 presses both the upper and lower pieces 174a and 174b of the pinch roller lever 174, and the pinch roller lever 174 moves in the direction of the arrow Q against the spring 177.
The pinch roller 21 is configured to be pressed against the capstan 23 by being rotated in the direction shown in FIG.

Note that when the excitation of the plunger 202 is cut off, the suction rod 204 and the connecting rod 206 are moved back in the opposite direction of arrow L by the coil spring 207, and the pinch roller lever 174 is moved by the spring 1.
77 in the opposite direction of the arrow Q direction,
Pinch roller 21 is separated from capstan 23. Then, as the moving table 157 is moved back to the backward movement position, the upper roller 190 is pushed up again to the side surface of the upper slide plate 159, and both the upper and lower rollers 189, 190 are moved to the pinch roller lever 174.
be separated from

By the way, according to the pinch roller crimping device 37 configured as described above, the pair of links 192, 193 and the connecting rod 206 constitute a boosting mechanism, so the suction force of the suction rod 204 is relatively weak. While using a (small capacity) plunger 202,
The pinch roller 21 can be strongly pressed against the capstan 23. Also, both upper and lower crimping levers 1
Although the levers 86 and 187 are pivoted on a common fulcrum shaft 188, they are substantially separated from each other, and both the upper and lower crimp levers 18
Both upper and lower rollers 189 are pivotally mounted to 6,187, respectively.
190 presses the upper and lower pieces 174a and 174b of the pinch roller lever 174, respectively, and presses the pinch roller 21 against the capstan 23, so it is easy to apply a uniform pressing force to both the upper and lower ends of the pinch roller 21. , the pinch roller 21 can be pressed against the capstan 23 in a completely parallel state.

According to the winding side loading device 15 configured as described above, when loading the tape 4 described above, the upper slide plate 159 of the movable table 157 is driven in the direction of the arrow K, and the upper slide plate 159 is driven in the direction of the arrow K. With the lower slide plate 158 being pulled by the coil spring 166, the moving table 157 is moved horizontally on the mechanical board 5 in the direction of arrow K. And the moving platform 157
As a result, the tape guide 20 and the pinch roller 21 are horizontally moved from the first backward movement position to the forward movement position, and the winding side 4b of the tape 4 is loaded. When the tape guide 20 and the pinch roller 21 reach the return position shown in FIG.
1 is pressed against the lower surface of the oblique side 183 of the lock plate 181, and the wedge effect at that time fixes the movable table 157, completing the loading of the tape 4 on the winding side 4b.

In addition, in the above-mentioned loading completed state, the tape guide 20 is connected to the tape guide 24a and the CTL head 2.
9. Audio erasure head 28, drum exit guide 26
The winding side 4b of the tape 4 that passes through the peripheral surface of the drum 13 is set at a predetermined angle that is perpendicular to the center of the tape and parallel to the surface of the tape. Then, in this loading completed state, that is, in a state in which the tape 4 has passed, the height adjusting device 172 described above is
This allows the height of the tape guide 20 to be adjusted freely and extremely easily.

When the loading is completed, the pinch roller 21 is moved to the forward position on one side of the capstan 23. Thereafter, by energizing the plunger 202, the pinch roller 20 is moved to the capstan by the pinch roller crimping device 37.
3 with a predetermined pressing force and in a completely parallel state.

Next, when unloading the tape 4, the upper slide plate 159 of the moving table 157 moves to the arrow J.
The lower slide plate 158 is rigidly pushed by the upper slide plate 159, and the movable table 157 is moved back horizontally on the mechanical board 5, and the tape guide 20 and the pinch roller 21 are moved in the direction shown in FIG. The tape 4 is moved back to the return position and the tape 4 is unloaded.

Note that the detection of loading completion and unloading completion of this winding side loading device 15 is as follows.
This is performed by the loading completion detection switch 137 and the unloading completion detection switch 147 of the supply side loading device 14.

Next, the drive device 36 that commonly drives both the loading devices 14 and 15 will be explained with reference to FIGS. 39 and 40.

First, the ring 51 and the moving table 157 are placed on the mechanical board 5.
A drive gear 211 that meshes with and drives the outer gear 53 of the ring 51 and a drive gear 212 that meshes with and drives the rack 168 of the upper slide plate 159 are rotatably supported. has been done. Note that the drive gear 212 is interlocked with the drive gear 211 via reduction gears 213, 214, and 215. Further, a motor 216 capable of forward and reverse rotation is mounted on the mechanical board 5 at a position on the rear side of the gear group. A motor shaft 217 of the motor 216 and a gear 218 rotatably supported on the mechanical board 5 and meshed with the drive gear 211 are connected to a belt transmission mechanism 219 consisting of a pulley and a belt.
and a gear transmission mechanism 220 consisting of a plurality of gears including a transmission shaft.

Then, by driving the motor 216,
A gear 218 is driven via a belt transmission mechanism 219 and a gear transmission mechanism 220, and the gear 218 drives one drive gear 211, and in conjunction with the drive gear 211, the other drive gear 21.
2 is decelerated and driven. and motor 216
Both drive gears 211, 212 are driven by the forward rotation of
are both rotationally driven in the direction of arrow R in FIG.
The ring 51 is driven to rotate clockwise in FIG. 8, and the upper slide plate 159 of the movable base 157 is driven, so that the movable base 157 moves in the direction of the arrow K in FIG.
The tape 4 is loaded by both the loading devices 14 and 15 described above. Note that when loading completion is detected by the aforementioned loading completion detection switch 137,
Motor 216 is stopped. However, at this time, the reduction ratio of one drive gear 211 to the other drive gear 212 is set to, for example, 4:1, and the ring 5
1 is moved at a speed four times the moving speed of the moving table 157. Then, the tape guide 16 on the supply side and the tape guide 20 on the take-up side arrive at the forward movement positions shown in FIG. 1 at the same time.

Further, by the reverse rotation drive of the motor 216, both drive gears 211 and 212 are rotationally driven in the direction of arrow S in FIG. 40, and the ring 51 is rotationally driven in the counterclockwise direction in FIG. The upper slide plate 159 of 157 is driven, and the moving table 15
7 is driven in the direction of arrow J in FIG.
unloading is performed.

Note that when the aforementioned unloading completion detection switch 147 detects the completion of unloading, the motor 216 is stopped, but in reality, as shown in FIG. 28, the motor 216 is moved back in the direction of arrow H. The motor 216 continues to rotate in the reverse direction even after the supply-side movable table 56 that has arrived presses the detection lever 144 with the protrusion 154 at the position shown by the solid line and the detection switch 147 is switched to the ON state. After the movable table 56 continues to be moved in the direction of the arrow H and reaches, for example, the position shown by the imaginary line, the motor 21
6 is switched from the reverse rotation state to the forward rotation state, and the moving table 56 is now moved in the direction of arrow I. Then, the moving table 56 again reaches the position indicated by the solid line, and the protrusion 154 pushes the detection lever 144 again.
The motor 216 is configured to be stopped only when the detection switch 147 is turned on again. At this time, a detection switch or the like is not used to switch the rotation of the motor 216 from a reverse rotation state to a forward rotation state when the moving table 56 reaches the position of the imaginary line. By time setting control from the time when the motor 21 is switched to the ON state,
The motor 216 is driven by a control circuit that switches to the above-mentioned rotation state of No. 6.

Then, by the above operation, the moving table 157 on the winding side
For example, 3 to 4 mm after being moved back to the back movement position.
It is configured to be moved in the forward direction by a very small distance and then stopped.

Thus, the tape loading device is composed of the above-mentioned supply side loading device 14, take-up side loading device 15, and a common drive device 36 for both loading devices 14, 1.
In each case, the tape 4 is loaded without any excessive force being applied to the tape 4 by twisting the tape 4, etc., at all times at the start of loading the tape 4, during loading, and at the end of loading.
Loading and unloading can be carried out extremely safely and smoothly on the travel path shown in FIG.

Further, the drive device 36 includes both loading devices 14,
15 in common, and one motor 216 is driven in forward or reverse rotation to drive both loading devices 14 and 15 forward or backward in complete synchronization with each other. This is extremely simple, and no timing deviation occurs at all during loading and unloading of the loading devices 14 and 15.

In addition, when the loading of the tape 4 is completed, all the tape guides 1 of both loading devices 14 and 15 are
Since all tapes 6 to 20 are effectively positioned and fixed, the running condition of the tape 4 is extremely stable, and highly accurate recording or reproduction can be performed.

In addition, the two tape guides 18 and 19 of the supply side loading device 14 are in a state where unloading is completed and are laid down in a substantially horizontal state below the guide holding plate 54 on the mechanical board 5, and the first
As shown by the imaginary line in the figure, it slips under the passed tape 4 and rises up, and operates to hook the tape 4, so that when the cassette 1 is installed, the lower end of the tape 4 The cassette 1 can be mounted extremely close to the mechanical board 5 by simply opening a very narrow gap between the edge and the mechanical board 5, which allows both tape guides 18 and 19 to slip through as described above. I can do it. Therefore, the gap _h1 between the bottom surface 1b of the cassette 1 and the mechanical board 5 shown in FIG. 2 can be made very small.

At this time, with the unloading completed, the two tape guides 18 and 19 are moved to the guide holding plate 5.
4, and then remove the three tape guides 1.
Since the configuration is such that only the four members 6, 17, 20 and the pinch roller 21 are moved back to the position corresponding to the bottom opening 10 of the cassette 1 to be loaded, the four members are They can be returned to the above position with a margin so that they do not collide with each other in a narrow position. When the cassette 1 is installed, only those four members are inserted inside the tape 4 inside the cassette 1 through the bottom opening 10, so there is no possibility that the tape 4 will be accidentally caught on these four members when inserted. This can be prevented and the insertion can always be performed safely and smoothly.

In addition, two tape guides 16 and 17 connect the ring 51 and the movable table 56 provided on the upper part of the rod 89.
The two tape guides 18 and 19 are configured as a rising guide, and the ring 51 is connected to the mechanical board 5.
Both tape guides 16 and 17 are moved along a predetermined movement path by simply horizontally rotating the tape guides 16 and 17 above.
8 and 19 are set up in a predetermined state, the ring 51 only needs to be rotated horizontally on the mechanical board 5, and the driving of the ring 51 is extremely simple.

Also, the moving table 15 of the winding side loading device 15
7 is simply moved horizontally on the mechanical board 5, so the driving of the moving table 157 is also extremely simple.

In addition, the moving table 56 of the supply side loading device 14
The moving path of the tape guide 16 can be arbitrarily and freely set, and the leading tape guide 16 is moved to the highest position in the forward movement position. On the other hand, the reciprocating stroke of the moving table 157 of the winding-side loading device 15 is very small. Therefore, the height of the tape loading device shown in Figure 2
h ₄ can be made very small, and the width w ₁ shown in FIG. 4 can also be made very small.

Next, the tape sliding guide bodies 38, 39 will be explained with reference to FIGS. 41 to 44.

First, tape guide 24a and drum exit guide 2
The support plate 22 straddles between the pair of fixed guides 6 and the upper part of the support column 223 installed on the mechanical board 5.
4 is installed horizontally. and support plate 2
A head mounting plate 225 is attached to the upper part of one end of the head 24 so as to be movable and adjustable in the horizontal direction, and an audio canceling head 28 and a CTL head 29 are installed at the lower part of the head mounting plate 225 via a head adjustment plate 226, respectively. It is installed so that it can be adjusted freely and the azimuth can be adjusted freely.

Both tape sliding guide bodies 38 and 39 are made of synthetic resin, for example, and are attached to the upper part of the head mounting plate 225 and the upper part of the other end of the support plate 224, respectively. Note that both tape sliding guide bodies 38 and 39 have dowels 227 and 228 integrally provided on their lower surfaces, respectively, to the head mounting plate 22.
5 and the support plate 224, respectively.
9 and 230, respectively, and are screwed by set screws 231 and 232, respectively. And both tape sliding guide bodies 38, 3
Slopes 233 and 234 for sliding the tape 4 downward are provided on the cassette 1 side of 9, and the lower ends of these lower slopes 233 and 234 are flush with or flush with the edge 224a of the support plate 244 on the cassette 1 side. It protrudes further toward the cassette 1 side. Note that both tape sliding guides 38 and 39 have a plurality of holes 235 for inserting tools such as screwdrivers for making various adjustments and other adjustments to both heads 28 and 29 and drum exit guide 26 while these are attached. It is provided.

By the way, as is conventionally known, when the cassette 1 is lowered horizontally and installed in the mounting position, the front of the cassette 1 is placed on the cover lifting plate 236 vertically provided on the mechanical board 5 as shown in FIG. The lower edge 9a on one end side of the lid 9 is brought into contact with the front lid 9, and as the cassette 1 descends as shown in FIG. be done. Therefore, while the cassette 1 is being installed, the front cover 9
When the tape 4 is opened, if the tape 4 in the cassette 1 is loosened in the path shown by the imaginary line in FIG. If the front cover 9 is opened to a certain extent, the tape 4 will unexpectedly fly out from the front opening 8 of the cassette 1 to the front of the cassette 1. If the tape 4 pops out while the cassette 1 is being installed,
The tape 4 that has flown out is unexpectedly caught on the mounting parts of the heads 28 and 29, the drum exit guide 26, etc., and is crushed by the front cover 9, resulting in fatal damage.

However, both tape sliding guide bodies 38, 39
By means of these slopes 223 and 234, the tape 4 that unexpectedly pops out from the cassette 1 as described above is pushed back toward the cassette 1 and safely slid downward. Therefore, even if the tape 4 unexpectedly jumps out as described above, this tape 4 will not be able to reach both heads 2.
It is possible to reliably prevent the cassette 1 from being accidentally caught on the attachment parts 8, 29, the drum exit guide 26, etc. and causing damage, and the cassette 1 can always be mounted extremely safely. As is conventionally known, inside the front lid 9 is a cassette body 237.
A tape presser 238 having a substantially L-shaped cross section is disposed to sandwich the tape 4 . For this reason, when installing the above cassette, both tape sliding guide bodies 3
The tape 4 guided by the tapes 8 and 39 and pushed back toward the cassette 1 comes into contact with the tape presser 238 and is prevented from entering the cassette 1 any further. Therefore, by mounting the cassette, the tape 4 is safely and smoothly inserted into the very narrow gap 239 between the rising guide 33 and the drum exit guide 26 shown in FIG.

However, as mentioned above, both tape sliding guide bodies 38,
Since the cassette 1 can be loaded while guiding the tape 4 at 39, the gap _l2 between the front surface 1a of the cassette 1 and the drum 13 shown in FIG. 2 can be made extremely small. However, the cassette 1 can be mounted as close as possible to the drum 13.

Next, the tension detection device 40 will be explained with reference to FIGS. 45 to 47.

First, the tension regulator pin (hereinafter simply referred to as a tension detection pin) 30 is vertically provided on the lower surface of one end of a tension regulator lever (hereinafter simply referred to as a tension detection lever) 242. This tension detection lever 242 is mounted on a fulcrum shaft 24 on a movable table 243.
It is rotatably supported via 4. Further, the movable table 243 is rotatably supported on the mechanical board 5 via a fulcrum shaft 245. And movable table 243
is rotated clockwise in FIG. 46 by a tension coil spring 246 stretched between it and the mechanical board 5. The stopper protrusion 247 provided on the lower surface of one end of the movable base 243 is connected to the end 248 of the loading completion detection lever 132.
The movable base 243 is configured to be rotated by the rotation of the loading completion detection lever 132. Further, the tension detection lever 242 is connected to the movable base 243 by a tension coil spring 249 stretched between the movable base 243 and the movable base 243.
46, it is rotated counterclockwise with respect to 3. Further, a pin 250 provided in a part of the tension detection lever 242 is loosely fitted into a hole 251 provided in a part of the movable base 243, and the tension detection lever 242 is moved within a certain angle on the movable base 243. It is configured to be rotatable. Note that the coil spring 249 is configured to be a sufficiently weaker spring than the coil spring 246. And the tension detection pin 30 of the tension detection lever 242
A magnet 252 is attached to the opposite end, and a magnetoresistive sensor 253 is attached to one end of the movable base 243 in close proximity to the magnet 252 via a printed circuit board 254. In addition, a magnetic resistance sensor 25 is installed on the other end side of the movable base 243.
A balancer 255 is installed to maintain balance with 3.

By the way, in the VTR shown here, both the reel stands 6 and 7 are directly driven by a pair of independently provided motors (not shown) (the motor shaft and the reel stand rotating shaft are integrated). be configured to do so).

This tension detecting device 40 detects a tape 4 running at a constant speed during recording or reproduction.
The tape tension on the supply side 4a of the tape 4 is electrically detected, and the rotational speed of the drive motor of the supply reel stand 6 is electrically controlled according to the change in the tape tension. It operates to maintain the tension in a constant tension state.

Next, to explain the operation status of this tension detection device 40, first, when the unloading of the tape 4 is completed, it is in the state shown in FIG. The detection lever 132 is pushed up onto the surface 136 and rotated counterclockwise. As a result, the protrusion 247 of the movable base 243 is pushed by the end 248 of the detection lever 132, and the movable base 243 is pushed by the coil spring 243.
The movable base 24 is rotated clockwise against the
Tension detection lever 24 supported on 3
2 is parked in a non-operating position. In this standby state, the tension detection pin 30 is placed at a sufficient distance from the loading path of the tape 4, so that the loading operation of the tape 4 by the supply-side loading device 14 described above is completely controlled by the tension detection pin 30. This can be done extremely smoothly without any interference.

Next, when the loading of tape 4 is completed, the fourth
It changes as shown in Figure 7. That is, as described above, at the same time that loading is completed, the roller 135 of the loading completion detection lever 132 touches the outer peripheral surface 136 of the ring 51.
The detection lever 132 is rotated clockwise by the coil spring 134. As a result, the detection lever 132
Following the movement of the end portion 248, the movable base 243 is rotated counterclockwise by the coil spring 246, and the tension detection lever 242 supported on the movable base 243 is moved as shown by the solid line in FIG. is moved to the indicated operating position. By moving to this operating position, the tension detection pin 30 comes into contact with the supply side 4a of the tape 4, and becomes in an operating state, that is, a state in which the tension of the tape 4 can be detected.

Next, when the tape 4 is run at a constant speed in this state and desired recording or reproduction is performed, the tension detection pin 30 is moved within the range shown by the imaginary line and dotted line in FIG. Tape tension on the supply side 4a is detected. That is, when the tape tension becomes weak, the tension detection lever 242 is rotated counterclockwise by the coil spring 249, and the tension detection pin 30 is moved to the position of the imaginary line, and conversely, when the tape tension becomes strong, The tension detection lever 242 is rotated clockwise against the coil spring 249, and the tension detection pin 30 is moved to the position indicated by the dotted line. However, due to the rotation of the tension detection lever 242 at that time, the magnet 252 is moved relative to the magnetic resistance sensor 253, and the rotation amount of the tension detection lever 242, that is, the change in tape tension is detected by the magnetic resistance sensor 253. detected. Based on the output of the magnetoresistive sensor 253, the rotational speed of the drive motor of the supply reel stand 6 is controlled, and the back tension of the tape 4 is maintained at a constant tension.

Next, when unloading tape 4, as mentioned above, at the moment of starting the unloading,
The roller 135 is pushed up onto the outer peripheral surface 136 of the ring 51, and the loading completion detection lever 132 is rotated counterclockwise as shown in FIG. At this time, the protrusion 247 of the movable base 243 is pushed by the end 248 of the loading completion detection lever 132, and the movable base 243 is pushed against the coil spring 243.
46 in the clockwise direction, the tension detection lever 242 is returned to the non-operating position.

In this tension detection device 40, a magnetoresistive sensor 253 disposed opposite to a magnet 252 attached to the tension detection lever 242 is attached to a movable base 243, and the tension detection lever 242 is moved from the non-operating position shown in FIG. 47
The structure is such that the magnetoresistive sensor 253 can be accurately opposed to the magnet 252 when moved to the operating position shown in the figure. Therefore, although the tension detection lever 242 is moved largely between the non-operating position and the operating position, the relationship between the magnet 252 and the magnetoresistive sensor 253 during the tape tension detection operation by the tension detection lever 242 is The positional relationship can always be maintained accurately, and the above-described tape tension detection operation of the tape 4 can be performed with high sensitivity and always accurately. In other words, since the magnetoresistive sensor 253 is a very sensitive sensor, the magnet 2
If the positional relationship between the magnet 252 and the magnet 252 deviates greatly, the amount of movement of the magnet 252 cannot be detected accurately, but this tension detection device 40 does not cause such inconvenience at all.

Next, the cassette holder locking device 41 will be explained with reference to FIGS. 48 to 50.

First, as is conventionally known, the cassette 1 is inserted into the cassette holder 258, and the cassette holder 258 holds both reel stands 6, 7 on the mechanical board 5.
It is constructed so that it can be mounted horizontally from above at the cassette mounting position. A locking piece 259 having a substantially hook shape is suspended downward from one side of the cassette holder 258, and when the cassette holder 258 is mounted, the locking piece 259 is inserted through an opening 260 provided in the mechanical board 5. and then inserted downward. On the other hand, a lock lever 261 for locking the inserted locking piece 259 is rotatably supported on one side of the mechanical board 5 via a fulcrum shaft 262. In addition, lock lever 26
A locking roller 263 is pivotally attached to the upper end of the locking member 1, and the roller 263 is configured to be engaged with a recess 264 of the locking piece 259. Further, a slide plate 265 serving as a lock release member is provided on one side of the mechanical board 5 so as to be slidable in the front-rear direction. Note that this slide plate 265 is the fulcrum shaft 26
2, and the elongated hole 266 engaged with the guide piece 267 integrally provided on the mechanical board 5.
68 and is configured to slide while being guided by. Then, the lock lever 261 is biased to rotate counterclockwise in FIG.
One end is brought into contact with a protrusion 271 integrally provided at one end of the slide plate 265 to restrict rotation in the counterclockwise direction. The slide plate 265 is prevented from sliding to the left in FIG. 49 by abutting one end of the elongated hole 268 against the guide piece 267. Further, a slide rod 272 is slidably attached to the mechanical board 5. One end 272a of this slide rod 272 is extended to the backward movement position of the movable table 157, and is configured to be pressed by one end 273 of the lower slide plate 158 of the movable table 157. And the other end 2 of the slide rod 272
72b is connected via a connecting pin 276 to one end 275a of a conversion link 275 rotatably supported on the lower surface of the mechanical board 5 via a fulcrum shaft 274, and the other end 275b of the conversion link 275 is connected to a slide plate 265. A pair of protrusions 27 integrally provided at the other end
It is inserted between 7,278 and 7,278. The slide rod 272 and conversion link 275 constitute a transmission member.

Next, to explain the operation status of this cassette holder locking device 41, first, the cassette holder 25
When the cassette holder 8 is not mounted (when the cassette holder is moved back above the cassette mounting position), the lock lever 261 is in the position shown by the phantom line in FIG. In this state, when the cassette holder 258 is installed at the cassette installation position,
The slope 279 of the piece 259 to be locked contacts the roller 263, and the locking lever 261 is moved by the coil spring 2.
The locked piece 259 is inserted downward while being rotated in the direction of arrow T in FIG. When the cassette holder 258 is installed in the cassette mounting position, the locking lever 261 is moved back in the direction of arrow U in FIG.
64 as shown in FIG. 49, and the cassette holder 258 is locked.

When the cassette holder 258 is mounted at the cassette mounting position, a cassette mounting detection switch (not shown) provided on the mechanical board 5 is turned on, and based on this, the above-described loading of the tape 4 is automatically performed. Configured to start.

On the other hand, when the eject button is pressed after recording or playback, the above-mentioned unloading of the tape 4 is started.

Then, by the above unloading, the moving table 15
7 will be moved backward in the direction of arrow J in FIG. 48, but when the unloading is completed, as mentioned above, after the moving table 157 once reaches the backward movement position (P ₁ ) shown by the imaginary line. , this time it is moved forward in the direction of arrow K, and from the backward movement position (P ₁ ), for example, 3
It is stopped at the stop position (P ₂ ) indicated by the solid line, which has advanced approximately 4 mm in the forward direction.

However, at this time, as shown in _FIG .
One end 273 is one end 272a of the slide rod 272
Touch this and press it. As a result, slide rod 27
2 is pushed in the direction of arrow V, the conversion link 275 is rotated in the direction of arrow W, and the slide plate 265 is slid in the direction of arrow X. Then the protrusion 271
pushes the pivot shaft 270 in the direction of the arrow X, so the lock lever 261 is rotated in the direction of the arrow T as shown by the solid line in FIG. 50 against the coil spring 269.
The roller 263 is removed from the recess 264 of the locked piece 259, and at that moment the cassette holder 258 is unlocked.

As is conventionally known, upon release of the lock, the cassette holder 258 is moved upwardly by the action of a spring for backward movement, and the cassette 1 is ejected.

After this, when the moving table 157, which once reached the return position (P ₁ ), is moved back to the stop position (P ₂ ),
The lock lever 261 is moved back in the direction of arrow U by the coil spring 269, and this lock lever 261 is moved back again to the position shown by the imaginary line in FIG. 50, in preparation for the next installation of the cassette holder 258. .

By the way, according to the cassette holder lock device 41 configured as described above, when the unloading of the tape 4 is completed, the lock lever 261 is rotated to the lock release position shown by the solid line in FIG. After releasing the lock of the cassette holder 258, the moving table 157
By returning the lock lever 261 by a predetermined distance (l ₁₀ ) in the forward direction, the lock lever 261 is automatically moved back to the lock position shown by the imaginary line in FIG. The structure of the cassette holder locking device 41 is such that the lock lever 261 and the moving table 157 need only be mechanically interlocked, and the interlocking mechanism can be very simple. becomes very simple.

Next, according to FIGS. 51 to 53, the drum 1
3 will be explained.

First, as is conventionally known, the drum 13 is composed of a lower fixed drum 283, an upper fixed drum 284, and a rotating drum 285 disposed between these.
A rotating head 286 consisting of a magnetic head is attached to the circumferential surface of the rotating drum 285.

On the other hand, the tape 4 that is helically wound around the circumferential surface of the drum 13 and runs is guided by a tape lead (step) 288 that is integrally provided on the circumferential surface of the lower fixed drum 283 with its lower edge 287 and runs. It is made to be done.

Next, this tape pressing device 282 presses the tape 4
During running, the upper end edge 289 of the tape 4 is lightly pressed elastically so that the lower end edge 287 of the tape 4 does not lift off from the tape lead 288.

The tape pressing device 282 includes a pair of tape pressing plates 290 made of synthetic resin, for example.
a, 290b are used, and these tape pressing plates 290a, 290b are connected to a pair of slits 2 of a holder 291 fixed to the upper part of the upper fixed drum 284.
92a and 292b, and are held in the holder 2, respectively.
They are engaged with fulcrum portions 293 provided at 91 through recesses 294 provided at their lower edges, respectively, and are configured to be freely rotatable in the vertical direction as shown in FIG. Then, a pin 295 fixed to the holder 291 is inserted between the tape holding plates 290a and 290b.
A linear spring 296 is wound and attached, and both ends 296a, 2 of the spring 296 are attached.
96b is engaged with a recess 297 provided at the upper edge of both tape holding plates 290a, 290b, and both tape holding plates 290a, 290b are rotated counterclockwise in FIG. It is energized.

Therefore, according to this tape pressing device 282, 1
A pair of tape holding plates 2 with a book spring 296
90a and 290b are pressed and energized at the same time, and the tape 4 is pressed by the pair of tape pressing plates 290a and 290b.
It is configured to press the upper edge 289 of the
The tape holding operation can be performed effectively, and the structure is extremely simple.

Next, as described above, when loading the tape 4, the two tape guides 18 and 19 stand up one after another inside the tape 4 of the tape cassette 1, hook the tape 4 one after another, and load the tape 4 into the tape cassette 1.
A method of regulating the rising angle of these tape guides 18 and 19 until they reach a predetermined position after being pulled out will be explained with reference to FIGS. 54 to 56. In this case, one tape guide 18
It will be explained only in .

First, a substantially arcuate guide plate 300 is provided along the side of the moving path of the tape guide 18 and is inclined so as to gradually become higher as it advances in the direction of arrow Z in FIG. An arcuate notch 302 is provided at a predetermined position on the arcuate circumferential surface 301 of the guide plate 300 . On the other hand, on one side of the tape guide 18 on the pivot side, a guided pin 303 is provided at a substantially right angle.

As a result of the rotation of the ring 51 described above, when unloading the tape 4, the tape guide 18 moves back in the direction of the arrow Y in FIG. The guide plate 300 from the notch 302
54 and 56, the tape guide 18 is gradually brought down as shown by the solid line in FIGS. 54 and 56.

On the other hand, when loading the tape 4, the tape guide 18 is pulled out from inside the cassette 1 and moved in the direction of arrow Z in FIG. I'll stand up and go as soon as I get there. Then, the tape guide 18 is moved to a predetermined position as shown by the imaginary line in FIG. As shown by the imaginary line, it rises to a predetermined angle and thereafter moves while maintaining that state.

In this case, the guide plate 300
With a very simple structure that only requires a , the rising angle of the tape guide 18 can be reliably regulated after the tape guide 18 is pulled out of the cassette 1 until it reaches a predetermined position. By using the above-mentioned rising guide body 33, even safer and smoother tape loading can be performed.

Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations shown in the embodiments, and can be modified to various effective configurations based on the technical idea of the present invention.

As described above, the present invention involves inserting a tape cassette into a cassette holder, mounting the tape cassette at the cassette mounting position with the cassette holder, and moving the reciprocally movable piece provided on the cassette holder to the cassette mounting position. In the cassette holder locking device configured to be locked by a locking lever, the locking lever is configured to be constantly moved and energized by a biasing means to a locked position, and the locking lever is moved against the biasing means. A reciprocating lock release member is provided to move the lock release member to the lock release position, and a tape guide is provided above the moving member that is driven by a motor to reciprocate.
A loading device is provided which loads and unloads the tape by reciprocating the tape guide along a predetermined movement path by the moving member, and when the unloading is completed, the loading device loads and unloads the tape. The movable member is configured to once move backward to a backward movement position and then returned by a predetermined distance in the forward movement direction, and when the moving member is moved backward to the backward movement position, a driving force is transmitted from the moving member. driving the lock release member to the lock release position by a transmission member;
By releasing the lock of the cassette holder by the lock lever and then returning the moving member a predetermined distance in the forward movement direction, the drive of the lock release member by the transmission member is released and the energizing member is released. Since the lock lever is moved back to the lock position by means of the lock lever in preparation for loading the next cassette, the movable member of the loading device returns once upon completion of tape unloading when the cassette is ejected. Taking advantage of the fact that the tape holder returns a predetermined distance in the forward direction after being moved back to the moving position, the tape holder is automatically unlocked by the lock lever at the moment the unloading is completed, and after the lock is released, the lock lever is can be automatically returned to the lock position again to prepare for the next cassette installation. Therefore, it is possible to provide a cassette holder locking device which has a very simple structure and can operate reliably, by simply operating the lock release member using the moving member when the unloading is completed. I can do it.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a tape loading device for a VTR.
The figure is a schematic plan view explaining the tape loading situation, Figure 2 is a side view of the tape supply side of the same as the above, Figure 3 is a side view of the tape winding side of the same as the above, and Figure 4 is a side view of the back side of the same as the above. 5 is a partially cutaway plan view showing the entire tape loading device, FIG. 6 is a perspective view showing the guide block portion of the supply side loading device, FIG. 7 is a plan view of the same, and FIG. The figure is a plan view showing the ring portion placed under the guide block, FIG. 9 is a developed cross-sectional view of the supply side loading device portion in the state where tape loading is completed, and FIG. 10 is the supply side in the state where tape unloading is completed. FIG. 11 is an exploded perspective view of the moving table portion of the supply side loading device; FIG. 12 is a perspective view showing the moving table moved close to the forward position; FIG. 13 is a plan view showing the state in which the above-mentioned moving table has been moved to the forward movement position, and FIG.
Fig. 15 is a cross-sectional view as seen from the arrow in Fig. 13, Fig. 16 is a plan view showing the connecting rod portion of the supply side loading device, and Fig. 17 is a sectional view in the direction shown by the arrow. Fig. 18 is a cross-sectional view in the direction of the arrow; Fig. 18 is a perspective view showing the rising tape guide portion of the supply side loading device;
Figure 9 is a plan view of the same as above, Figure 20 is Figure 19-
21 is a partially cutaway perspective view showing the rising guide portion of the supply side loading device; FIG. 22 is a partially cutaway plan view of the same as above; FIG. Figure - Cross-sectional view in the direction of arrows, Figure 24 is Figure 22 -
25 is a perspective view showing the positioning plate portion of the rising tape guide portion of the supply side loading device, FIG. 26 is an exploded sectional view of the same, and FIG. 27 is the loading completion detection lever portion. 28 is a plan view showing the unloading completion detection lever portion, FIG. 29 is a perspective view showing the movable table portion of the winding side loading device, and FIG. Figure 31 is the 30th
Figures XI-XI are a sectional view in the direction shown by the arrows, Figure 32 is a plan view showing the main parts of the above moving platform when it has been moved to the forward movement position, and Figure 33 is the state seen in Figure 32--the direction shown in the arrows. FIG. 34 is a plan view showing the pinch roller crimping device, and FIG.
Figure 5 is a perspective view showing the main parts of the same as above, Figures 36, 37 and 38 are partially cutaway plan views of the main parts to explain the crimping operation of the pinch roller, and Figure 39 is a drive unit part. FIG. 40 is a plan view showing the main parts of the same, FIG. 41 is a plan view showing the tape sliding guide portion, FIG. 42 is a front view of the same, and FIG. 44 is a partially cutaway side view illustrating the sliding guide action of the tape when a cassette is installed, FIG. 45 is a perspective view showing the tension detection device, and FIGS. 46 and 47 are the tension detection device. 48th plan view explaining the operation of
The figure is a perspective view showing the cassette holder locking device, FIGS. 49 and 50 are partially cutaway side views illustrating the locking and unlocking operations of the cassette holder, and FIG. 51 is a tape pressing device. A plan view, FIG. 52 is a front view of the same as above, FIG. 53 is a sectional view taken along line L-L in FIG. 52, and FIG.
The figure is a plan view showing a method for regulating the angle of the rising tape guide, Figure 55 is a sectional view taken along the line L-L in Figure 54, and Figure 56 is a cross-sectional view taken along the line L-L in Figure 54. It is. Further, in the symbols used in the drawings, 1...tape cassette, 4...magnetic tape, 5...mechanical board, 13...rotating head drum, 14...supply side loading device, 15...take-up side loading device, 20...Tape guide, 41...Cassette holder locking device, 56...Moving table, 144...
...Unloading completion detection lever, 147...
Unloading completion detection switch, 157...
Moving table, 158...lower slide plate (moving member),
258...Cassette holder, 259...Locked piece, 216...Motor, 261...Lock lever, 265...Slide plate (lock release means),
269...Coil spring (energizing means), 27
2...Slide rod (transmission member), 275...Conversion link (transmission member).

Claims (1)

[Claims] 1. Insert the tape cassette into the cassette holder, use the cassette holder to attach it to the cassette mounting position, and lock the piece provided on the cassette holder with the reciprocating lock lever provided at the cassette mounting position. In the cassette holder lock device, the lock lever is always moved and energized by a biasing means to a lock position, and the lock lever is moved back and forth to a lock release position against the biasing means. A movable lock release member is provided, a tape guide is provided on the upper part of the moving member which is driven by a motor to reciprocate, and the tape guide is caused to reciprocate along a predetermined movement path by the moving member. A loading device for loading and unloading the tape is provided,
This loading device is configured such that, upon completion of the unloading, the movable member is moved back to the backward movement position and then returned by a predetermined distance in the forward movement direction, and the movable member is returned to the backward movement position. The lock release member is driven to the lock release position by the transmission member to which driving force is transmitted from the moving member when the lock lever is moved, and the lock of the cassette holder by the lock lever is released, and then the moving member is moved. By returning a predetermined distance in the forward movement direction, the drive of the lock release member by the transmission member is released, and the energizing means moves the lock lever back to the lock position to release the next cassette. A cassette holder locking device characterized in that it is configured to be ready for mounting.