JPH0792959B2 - Tape Producing Equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tape loading device for moving a first tape guide block and a second tape guide block to load a tape onto a rotary head drum.

[Outline of Invention]

The present invention is a tape loading device configured to move a first tape guide block and a second tape guide block to wind a tape around an outer peripheral surface of a rotary head drum at a predetermined angle. The movement paths of the first and second semi-ring gears, to which the second tape guide blocks are respectively attached, are configured to overlap each other, and the first and second tape guide blocks are provided with the first and second semi-ring gears. The tape loading device has a minimum area by having a moving path different from the moving path of the ring gear and being guided by guide grooves formed in the fixed chassis and the moving chassis.
It has a minimum height and a minimum volume.

[Conventional technology]

Conventionally, by hooking the tape on a tape guide provided on a pair of tape guide blocks arranged on both sides of the rotary head drum and moving the tape guide block, the tape is moved to the rotary head drum at a predetermined angle. A tape loading device is known in which the tape is wound around and loaded. In such a tape loading device, a pair of links or a pair of ring gears are used to move the tape guide block.

When a pair of links is used, a pair of links with tape guide blocks attached to the ends thereof are arranged on both sides of the rotary head drum, and the ends of these links are moved outside the rotary head drum. Thus, the tape is loaded on this rotary head drum.

When using a pair of ring gears, a pair of ring gears to which the tape guide blocks are attached are arranged in a substantially superposed state, and the rotary head drum is attached to the central portion of the area surrounded by these ring gears. The pair of ring gears are rotated in opposite directions to load the tape on the rotary head drum.

[Problems to be solved by the invention]

However, when a pair of links is used in the conventional tape loading device, it is necessary to provide a space for moving these links on both sides of the rotary head drum, and since this space is very large, Space factor gets worse.

Further, when a pair of ring gears is used, these ring gears occupy the entire space around the rotary head drum, so that the space factor of the tape loading device becomes worse.

[Means for solving problems]

The present invention provides a tape loading device configured to wind a tape around an outer peripheral surface of a rotary head drum at a predetermined angle by moving the first and second tape guide blocks near the outside of the rotary head drum, A first semi-ring gear movably arranged near the outside of the rotary head drum and having the first tape guide block attached thereto via a connecting link and the like, and movably arranged near the outside of the rotary head drum. And a second tape guide block to which the second tape guide block is attached via a connecting link or the like, and guide members for guiding the first and second semi-ring gears, respectively. The movement locus of the semi-ring gear and the movement locus of the second semi-ring gear are configured to overlap each other, and The second tape guide block and the second tape guide block each have a trajectory different from the trajectories of the first and second semi-ring gears, and are guide grooves formed by a portion formed on the fixed chassis and a portion formed on the movable chassis. The tape device was configured to be guided.

〔Example〕

An embodiment in which the present invention is applied to a loading device in an 8 mm VTR will be described below with reference to the drawings.

First, an outline of this VTR will be described with reference to FIGS. 2 and 3.

The 8 mm VTR main body 1 is composed of a main chassis 2 and a slide chassis 3. Four guide parts 29 are attached to the main chassis 2, and four elongated holes 30 are formed in the slide chassis 3 corresponding to these guide parts 29. Since the guide portion 29 is inserted and locked in the long hole 30, the slide chassis 3 is moved upward in FIG. 2 or down in FIG. 3 by the length of the long hole 30 with respect to the main chassis 2. It is slidably mounted. A drum base 8 is attached to the main chassis 2, and the rotary head drum 4 is rotatably supported by the drum base 8 in an inclined state. Supply reel stand 12 to slide chassis 3
The take-up reel base 13 is rotatably supported. Movement guide rails 9 and 10 are attached to the slide chassis 3. As shown in FIG. 2, the tape guide block 14 is slidable over guide groove portions 8a formed on the drum base 8 and guide groove portions 9a formed on the movable guide rail 9 via guide pins 37 and 38 described later. Installed. As shown in FIG. 2 as well, the tape guide block 15 slides over guide groove portions 8b formed on the drum base 8 and guide groove portions 10a formed on the moving guide rail 10 via guide pins 44 and 45 described later. It is movably attached. The guide roller 20 and the capstan 17 are attached to the main chassis 2, and the slide chassis 3
A pinch roller 19 is attached to.

The pair of semi-ring gears 5 and 6 shown in FIG. 1 are rotatably movably arranged vertically below the drum base 8 and the movement guide rails 9 and 10 with respect to the drawings in FIGS. 2 and 3. It is attached to the main chassis 2.

Next, the outline of the tape loading device and its periphery will be described with reference to FIGS.

Guide members 60 and 61 are attached to the main chassis 2, arc-shaped elongated holes 56 and 57 are formed in the semi-ring gear 5 corresponding to the guide members 60 and 61, respectively, and the semi-ring gear 6 is circular. Arc-shaped elongated holes 58 and 59 are formed, respectively. Since the guide member 60 is inserted and locked in the long hole 56 and the long hole 58, respectively, and the guide member 61 is inserted and locked in the long hole 57 and the long hole 59, respectively, the semi-ring gears 5 and 6 are connected to each other. It is attached to the chassis 2 so as to be movable about the length of one of these circular arc-shaped long holes 56 to 58. Further, as shown in FIG. 5, the spacers are formed on the guide members 60 and 61, respectively, and the semi-ring gears 5 and 6 are attached with the spacers sandwiched therebetween. 6 do not touch each other. Guide holes 51 and 52 are formed in the front end portion 5c of the semi-ring gear 5, and the locking claw 40a formed in the guide block 40 is inserted into the guide hole 51, and the guide hole 52 includes A guide portion 40b formed on the guide block 40 is inserted and locked. One end of the tension coil spring 41 is attached to a locking portion 51a formed at the front end of the guide hole 51 of the semi-ring gear 5, and the other end is attached to a locking claw 40a of the guide block 40. ing.

Guide holes 53, 54 and 55 are formed in the front end portion 6c of the semi-ring gear 6 as shown in FIG.
The locking claw 47a formed in the guide block 47 is inserted, the guide portion 47b formed in the guide block 47 is inserted and locked in the guide hole 54, and the guide hole 55 is inserted in the guide hole 55. Has a mounting portion 47c mounted on the guide block 40 inserted and locked. One end of the tension coil spring 48 has a guide hole 53 for the semi-ring gear 6.
Is attached to the locking claw 53a formed at the front end of the guide block 47, and the other end is attached to the locking claw 47a of the guide block 47.

On the upper surface of the guide base 63 (FIG. 1), a tape guide 35 composed of a guide roller is mounted almost vertically, and a guide pin 36 is mounted at an inclination, and a guide pin 37 is mounted on the lower surface thereof. , 38 are mounted vertically. As described above, the tape guide block 14 is
It is composed of a guide base 63, a tape guide 35, guide pins 36, and guide pins 37, 38. The connection link 39 is
One end thereof is rotatably attached to the tip end of the guide pin 37, and the other end is rotatably attached to a U-shaped attachment portion 40c integrally formed at the front end of the guide block 40. ing. As shown in FIG. 1, the mounting portion 40c
Since its tip is sufficiently separated from the semi-ring gear 5, it does not prevent the semi-ring gear 6 from returning to the position shown by the alternate long and short dash line in FIG.

On the upper surface of the guide base 64, a tape guide 42 consisting of a guide roller is mounted almost vertically, and a guide pin 43 is mounted at an angle, and on the lower surface thereof, guide pins 44 and 45 are respectively vertical. Installed on. As described above, the tape guide block 15 includes the guide base 64, the tape guide 42, the guide pin 43, and the guide pin 4.
It is composed of 4, 45. One end of the connecting link 46 is rotatably attached to the tip end portion of the guide pin 44, and the other end is rotatably attached to the attaching portion 47c attached to the front end portion of the guide block 47. There is.

Locking blocks 32, 33 and 34, which are integrally molded by a mold, are attached to the main chassis 2 along the vicinity of the outside of the semi-ring gears 5 and / or 6. Locking block
Reference numeral 32 denotes a rear end of the semi-ring gear 6 shown by a dashed line in FIG. 1 while preventing the front end portion 5c of the semi-ring gear 5 shown by a solid line in FIG. The position regulating plate 32a prevents the portion 6d from descending toward the semi-ring gear 5. As shown in FIG. 5, the locking block 33 prevents movement of the semi-ring gears 5 and 6 outside the allowable range in the vertical direction in FIG. 5 by the position regulating plates 33a, 33b and 33c. The locking block 34 prevents the front end portion 6c of the semi-ring gear 6 shown by the solid line in FIG. 1 from bending toward the tape guide block 15 by its position regulating plate 34a, and a plate attached to this locking block 34. The spring 62 biases the guide pin 45 of the guide block 15 toward the tape guide 42.

Next, an outline of the drive mechanism of the VTR main body 1 will be described with reference to FIGS. 4 and 6.

A control motor 21 is attached to the main chassis 2, and torque from the control motor 21 is reduced by a reduction gear unit 22 composed of a gear group rotatably attached to the main chassis 2.
Is transmitted to a drive gear 23 rotatably attached to the main chassis 2. Drive gear 23 as shown in FIG.
Is a drive gear that meshes with the gear portion 5a of the semi-ring gear 5 and is rotatably attached to the main chassis 2.
It meshes with the lower part of 24, and the upper part of this drive gear 24 meshes with the gear part 6 a of the semi-ring gear 6. in this way,
Since the torque from the speed reducer 22 is configured to be transmitted to the semi-ring gear 5 via the drive gear 23 and to the semi-ring gear 6 via the drive gear 23 and the drive gear 24, the semi-ring gear 5, 6 rotate in reverse to each other.
The torque from the semi-ring gear 6 is a sliding device 25 composed of a gear group rotatably attached to the main chassis 2.
Is transmitted to a cam gear 26 rotatably attached to the main chassis 2 about a fulcrum shaft 27 as a rotation center. A cam portion 28 having a cam groove 28a is attached to the lower surface of the slide chassis (see FIG. 2 or 3). The cam portion 28 is attached to the end portion of the cam gear 26. Cam pin 26a is inserted.

Next, the operation of the 8 mm VTR main body 1 configured as described above will be described.

As shown in FIG. 2, the tape cassette 11 is a supply reel stand.
When mounted on the slide chassis 3 via the winding reel base 12 and the take-up reel base 13, the tape guide block 14 in the backward movement position,
15 is inserted into the notch 11a of the tape cassette 11.
The mounting is detected by a mounting detection device (not shown), and loading is started. In the starting state of the loading, the front end portion 5c of the semi-ring gear 5 shown by the chain line in FIG. 1 is locked by the guide member 60 (not shown). The front end 6c of the semi-ring gear 6 shown by the alternate long and short dash line in FIG. 1 is locked by a guide member 61 (not shown), and the rear end 6d is located near the position regulating plate 32b of the locking block 32. To position.

As shown in FIG. 4, when the control motor 21 is driven to rotate, both drive gears 23 and 24 are driven to rotate in opposite directions via the reduction mechanism 22, so that the semi-ring gears 5 and 6 rotate clockwise and counterclockwise, respectively. It is driven to rotate in the circumferential direction. Further, when the semi-ring gear 6 is rotationally driven in the counterclockwise direction, the cam gear 26 is rotationally driven in the clockwise direction with the fulcrum shaft 27 as the center of rotation through the sliding device 25. Because of this, the cam gear
The cam pin 26a of 26 starts to move from the position indicated by the alternate long and short dash line to the position indicated by the alternate long and short dash line, and accordingly, the cam portion 28 is indicated by the solid line from the position indicated by the alternate long and short dash line via the cam groove 28a. The forward movement is started. Therefore, the slide chassis 3 to which the cam portion 28 is attached starts to move from the position shown in FIG. 2 to the position shown in FIG. 3 with respect to the main chassis 2.

At this time, the tape guide block 14 shown in FIG.
Is the magnetic tape on the tape guide 35 and the guide pin 36.
When the semi-ring gear 5 is hooked with 50 and is rotated clockwise, the semi-ring gear 5 is guided by the guide groove portion 9a of the guide rail 9 and starts to move forward in the leftwardly upward direction in FIG. Immediately before the tape guide block 14 moves forward and contacts the end 9b of the guide rail 9, the slide chassis 3 has moved sufficiently upward in FIG. Therefore, the end portion 8c of the drum base 8 and the end portion 9b of the guide rail 9 are in close contact with each other, and the guide groove portions 8a and 9a are connected to each other to form one guide groove portion. Is guided by the one guide groove portion and smoothly moves forward from the moving guide rail 9 to the drum base 8. The tape guide block 15 shown in FIG. 2 has a tape guide 42 and guide pins.
The magnetic tape 50 is hooked on 43 and the semi-ring gear 6 is rotated in the counterclockwise direction to guide groove 10 of the guide rail 10.
Guided by a, the forward movement starts in the upward rightward direction in FIG. Immediately before the tape guide block 15 moves forward and contacts the end 10b of the guide rail 10, the slide chassis 3
Has moved sufficiently upward in FIG. For this purpose, the end 8c of the drum base 8 and the end 10b of the guide rail 10 are
And the guide groove portions 8b and 10a are connected to each other to form one guide groove portion, so that the tape guide block 15 is guided by the one guide groove portion to move the guide rail.
Moves smoothly from 10 to the drum base 8. Finally, the slide chassis 3, the moving guide rails 9 and 10, the tape guide blocks 14 and 15, and the pinch roller 19 move forward from the backward movement position shown in FIG. 2 to the forward movement position shown in FIG.

In the loading completion state shown in FIG. 3, the front end portion 5c of the semi-ring gear 5 shown by the solid line in FIG. 1 is located near the position regulating plate 32a of the locking block 32, and the rear end portion 5d thereof is a guide member. It is locked at 61. The semi-ring gear 6 shown by the solid line in FIG.
6c is located in the vicinity below the position regulating plate 34a, and its rear end 6d is locked by the guide member 60. Further, as shown in FIG. 5, the outer periphery of the semi-ring gear 5 is always sandwiched between the position regulating plate 33b and the position regulating plate 33c of the engaging block 33, and the semi-ring gear 6 retains its outer peripheral portion in the engaging block. It is always sandwiched between the position regulation plate 33a and the position regulation plate 33b of 33. At this time, as shown in FIG. 3, the magnetic tape 50 includes the guide roller 20, the tape guide block 14,
It is guided to the pinch roller 19 and the pinch roller 19 and loaded on the rotary head drum 4, and is sandwiched between the capstan 17 and the pinch roller 19.

Immediately before the loading is completed, the tape guide block 14 completes the forward movement by bringing its guide pin 38 into contact with the terminal end of the guide groove 8a.
The semi-ring gear 5 that pulls in the forward direction tries to continue the forward rotation in the clockwise direction in FIG. For this reason, as is apparent from FIG. 1, the tension coil spring 41 interposed therebetween is stretched by almost the length of the guide hole 52, and the tape guide block 14 is moved forward by the restoring force of the tension coil spring 41. It is biased in the moving direction. At this time, a force to lift the semi-ring gear 5 upward in FIG. 1 acts on the gear 5 via the tape guide block 14, but the upper end portion 5c of the semi-ring gear 5 is a locking block.
Since the position is regulated by the position regulating plate 32a of 32, it does not bend upward from a predetermined position. Similarly, tape guide block
15 is urged in the forward direction by the restoring force of the tension coil spring 48. At this time, a force to lift the semi-ring gear 6 upward through the tape guide block 15 acts on the semi-ring gear 6, but the upper end 6c of the semi-ring gear 6 restricts the position of the locking block 34. Since the position is restricted by the plate 34a, the plate 34a does not bend upward from the specified position.

Further, the semi-ring gears 5 and 6 respectively rotate about 96 ° in the clockwise direction and the counterclockwise direction from their returning positions shown by the one-dot chain line in FIG. 1 to their forward moving positions shown by the solid line in FIG. They move so that their trajectories overlap each other. At this time, since the semi-ring gears 5 and 6 are always guided by the guide members 60 and 61 and are also locked by the locking block 33, they do not rattle each other.

As described above, the semi-ring gears 5 and 6 are configured such that their loci of movement overlap each other, but they do not surround the entire circumference of the rotary head drum 4, and the semi-ring gears 5 and 6 do not. The other side of the tape cassette 11 of the drum 4 is not reached.

According to the present invention, in the tape loading device for winding the tape on the outer peripheral surface of the rotary head drum at a predetermined angle, the first and second semi-ring gears are used and the movement loci of these semi-ring gears are mutually different. The first and second parts are configured so as to overlap with each other and further via a connecting link or the like.
1st and 2nd respectively attached to the semi-ring gear of
The tape guide block of is guided by the guide groove provided in the fixed chassis and the rest in the moving chassis, so the space factor of the device is significantly improved compared to the case of using the conventional link or ring gear. did.

[Brief description of drawings]

The drawings show an embodiment in which the present invention is applied to an 8 mm VTR tape loading device. FIG. 1 is a perspective view of a main part of the loading device in the embodiment, and FIG. 2 is an unloading state. Fig. 3 is a diagram showing the loading state, Fig. 4 is a schematic diagram of an 8 mm VTR drive mechanism,
5 is a sectional view taken along the line VV of FIG. 4, FIG. 6 is a view showing the drive gear and its vicinity, and FIG. 7 is a sectional view taken along the line VII-VII of FIG. In the reference numerals used in the drawings, 2 ... main chassis (fixed chassis) 3 ... slide chassis (moving chassis) 4 ... rotary head drum 5,6 ... semi-ring gear 8a, 8b, 9a, 10a ... guide groove (Guide groove) 14,15 …… Tape guide block 39,46 …… Connection link 50 …… Magnetic tape 60,61 …… Guide member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-127956 (JP, A) JP-A-57-127957 (JP, A) JP-A-57-127959 (JP, A) JP-A-59- 107446 (JP, A) JP 59-171070 (JP, A) JP 59-218658 (JP, A) JP 60-171684 (JP, A) JP 60-209959 (JP, A) Japanese Unexamined Patent Publication No. 61-258368 (JP, A) Actually developed 61-121546 (JP, U)

Claims (1)

[Claims] 1. A tape loading device configured to wind a tape around an outer peripheral surface of a rotary head drum at a predetermined angle by moving first and second tape guide blocks near the outside of the rotary head drum. A first semi-ring gear movably arranged near the outside of the rotary head drum and to which the first tape guide block is attached via a connecting link or the like; and movably near the outside of the rotary head drum. A second semi-ring gear that is arranged and to which the second tape guide block is attached via a connecting link or the like; and a guide member that guides the first and second semi-ring gears. And a moving locus of the second semi-ring gear of the second semi-ring gear overlap each other, and These serial first and second tape guide block first
And a second semi-ring gear, each of which has a movement locus different from that of the second semi-ring gear, and is guided by a guide groove composed of a portion formed on the fixed chassis and a portion formed on the moving chassis. Tape loading device.