JPS61264539A - Reel turn table moving device - Google Patents

Abstract

PURPOSE:To make it possible that three kinds of cassette tape for which the reel position is changed linearly are set to one device, by displacing the axis of rotation of the first rotating body and the axis of turning of a turning arm held by this rotating body so that the reel turn table is arranged in three positions on a straight line when the rotating body is rotated. CONSTITUTION:When a turning arm 22 is turned with a turning shaft 23 fixed at one point in case of movement from a position X for large cassette to a position for middle cassette, the axis of rotation of a reel turn table 24 is in a position V and a position for small cassette where the arm 22 is turned furthermore and three points are not arranged on a straight line; but the axis of turning of the turning arm 22 is moved to arrange them on a straight line. In such a case, a length (l) between axes and a length S are made equal to each other. The extent of movement of the table 24 to each cassette position is determined by the length of the turning arm 22 and the turning angle. The length (l) between axes is determined by the length S generated by turning of the turning arm 22 and the rotation angle of the first rotating body 26.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a reel stand device such as a magnetic recording and reproducing device that records and reproduces signals by running a tape-like medium, and particularly relates to a reel stand device for recording and reproducing signals by running a tape-like medium, and in particular for attaching and detaching a plurality of tape cassettes of different sizes. The present invention relates to a possible reel table moving device.

2. Prior Art As a conventional reel table moving device, for example,
No. 127.954.

Figure 5 shows the 2f that is attached and detached from this conventional reel table moving device.
This shows a tape cassette of type li. The example described here is 5
These are used for video tape recorders that use inch-width tapes, 1 is a VH8 cassette, 2 is a β cassette, and the double-sided set is the cassette holder 3 of the device.
The position is regulated and the device is installed. At this time, the reel stand 4 for the supply reel is shared, and the take-up reel stand 5 moves to the position σ when the β cassette is used. FIG. 6 shows the moving mechanism of the take-up reel stand. Reference numeral 6 denotes a rotating lever, on one side of which the take-up reel stand 6 is rotatably supported by a support shaft 7, and on the other side is a support shaft 8. It is rotatably supported on the shaft. Further, an engagement pin 9 is provided on the rotation lever e. Reference numeral 10 denotes a switching lever that detects the type of cassette and moves the position of the take-up reel stand 6, which slides in the direction of arrow a guided by a fixed pin 11 and stops when it comes into contact with the end of the elongated hole 12. do.

Further, an arm 10' protruding from a part of the switching lever 10 has an elongated hole 13 at its tip and engages with the engagement pin 9.

A relay pulley 14 is rotatably held by a support shaft 8 and transmits the rotation of the motor 15 to the take-up reel stand 5.

In the conventional reel table moving device configured as described above, first, when one VHS cassette is loaded, the switching lever 10
The take-up reel stand 6 is also at the position shown by the solid line and engages with the VH3 upper cassette 1 take-up reel (not shown). Then, the rotation of the motor 15 is transmitted to the take-up reel.◇On the other hand, when the β cassette 2 is installed, the switching lever 1o moves to the position indicated by the dashed line, rotates the rotary lever 6, and moves the take-up reel stand 5 to the 6' position. to engage with the take-up reel (not shown) of the β cassette 2. At this time, since the center of rotation of the rotary lever and the center of rotation of the relay pulley 14 are aligned, the distance between the axes of the take-up reel stand 5 and the relay pulley 14 does not change, and good transmission conditions are maintained.

Problems to be Solved by the Invention However, there are different types of cassettes, such as a large cassette 16, a medium-power set 17, and a small cassette 18, as shown in FIG. In the case of a configuration in which the loading mechanism is shared by the supply reel 20 and the take-up reel 20', 2d', and 21', respectively.

21" position, and each reel stand must also be moved accordingly. However, in the moving device with the configuration shown in Figure 6, additional setting positions are added in addition to the two positions mentioned above. However, the position is not placed on the straight line connecting the two positions, and it is impossible to move it linearly to three positions as shown in FIG.

In view of the above, an object of the present invention is to provide a reel stand moving device capable of moving a reel stand to three positions arranged on a straight line. a rotating arm that is provided with a reel stand and rotatably supported on the other side; a γ rotary body that has a support shaft of the rotating arm at a position displaced from the center of rotation; a second rotating body that rotates the rotating arm in conjunction with the rotating body, and the rotating arm is configured such that when the rotating body is rotated, the reel stand moves through at least three points on a straight line. This is a reel stand moving device in which the spindle position is displaced.

For production The effect of this technical means is as follows.

When moving the mass rotating arm from the large cassette reel position to the medium force set reel position and the small cassette reel position, a second rotating body rotates the rotating arm by a predetermined angle to three angular positions. Place the reel stand. At this time, if the rotation axis is fixed at one point and rotated, it will be rotated at three points on the arc, so the rotation axis will be rotated at the same time as the rotation arm is rotated so that the reel stand is placed at three points on a straight line. The rotating shaft of the rotating arm is moved by one rotary body @ Embodiment FIG. 1 is a side sectional view of a reel table moving device according to an embodiment of the present invention. In FIG. 1, 22 is a rotating arm, one of which is rotatably held by a rotating shaft 23, and a reel motor 26 equipped with a reel stand 24 is attached to the other. 026 is a first rotating body. It is fixed to the foot rotation shaft 27 and has a gear formed in part. Further, the rotation shaft 23 is attached to the first rotating body 26 at a position C displaced from the center of rotation by l. 28 is the second
It is a rotating body rotatably held by a rotating shaft 27 and has a gear formed on its inner surface. Further, this second rotating body 28 is provided with a rotating rod 44, and the rotating arm 22
It engages with a 3° elongated hole provided in the hole. Reference numeral 29 denotes an intermediate gear which is rotatably supported by a support shaft 31 provided on the gear arm 30 to interlock the first and second rotating bodies 26 and 28.

Reference numeral 32 denotes a bearing that rotatably holds the rotary shaft 27. A worm wheel 36 is fixed to the other side of the rotary shaft 27 and engages with a worm 34 to decelerate the rotation of the motor 36. introduce. Further, the motor 36 is attached to the board 33 with a mounting base 37, and starts operating in response to a cassette switching signal from the outside. A ball 38 is pressed by a plate spring 39 and inserted into a V-shaped groove 43 formed on the bottom surface of the second rotating body 28 to position the rotating body. These V grooves are provided at three locations, and when the rotating arm 22 comes to the large cassette reel, medium force set reel, and small cassette reel position, the ball 3
8 is configured to engage. Also, worm wheel 3
The detection piece 4o provided at 5 is a detector 41 consisting of a light emitting diode, phototransistor, etc. held by a fixture 42.
make it work. The timing is made to coincide with the respective positions where the balls 38 engage with the three V-grooves 43, and the signal from the detector 41 stops the operation of the motor 3e. This embodiment has the configuration of one of the reel stand devices shown in FIG. 7, and in reality, devices having the same configuration as this embodiment may be provided on both sides.

The operation of the reel table moving device of this embodiment configured as described above will be described below.

First, when installing the large cassette 16 shown in FIG. , the second rotating body 28 is rotated counterclockwise via the intermediate gear 29. and rotating arm 22
is placed in the position shown in FIG. 2, the detector 41 operates to stop the rotation of the motor 3θ, and the ball 38 engages with the V-groove 43 at the large cassette position of the second rotating body 28. Then, the position of the second rotating body 28 is regulated and maintained. The position of the reel stand 24 at this time is the large cassette reel position. The reel motor 26 drives the reel.

Next, when installing the medium force set 17 shown in FIG. 7, the motor 36 is activated by an external switching signal to the medium force set position, and rotates the first rotating body 26 90 degrees counterclockwise. At the same time, the second rotating body 28 is rotated clockwise. When the rotating arm 22 is placed at the position shown in FIG. (not shown) to regulate and maintain the position of the second rotating body 28. In this process, the rotation arm 422 is rotated clockwise by the rotation rod 44 provided on the second rotation body 28, and the rotation shaft 23 provided on the first rotation body 26 is moved. As a result, the center of rotation is displaced to the position shown in FIG. 3, and the actual center of rotation of the reel stand 24 is moved from x to Y as shown in FIG. Reel stand 24 at this time
9 reel motor 25 where the position is the medium force set reel position
to drive the reel.

Next, when installing the small cassette 18 shown in FIG. 7, the motor 36 is activated by an external switching signal to the medium force set position, and the first rotating body 26 is further rotated 90 degrees counterclockwise. At the same time, the second rotating body 28 is rotated clockwise. When the rotating arm 22 is placed at the position shown in FIG. (not shown) to regulate and maintain the position of the second rotating body. In this process, the rotating arm 22 is rotated clockwise by the rotating rod 44 provided on the second rotating body 28, as described above, and the rotating arm 22 is rotated clockwise by the rotating rod 44 provided on the second rotating body 28.
As the rotation shaft 23 provided in the reel moves, the rotation center is displaced to the position shown in FIG. 4, and the actual rotation center of the reel stand 24 moves from Y to Z as shown in FIG. The position of the reel stand 24 is the position of the small cassette reel, and the reel is driven by the reel motor 26. When moving the large cassette from position Although the position of V and the position of the rotated small cassette cannot be placed on a straight line, the rotating arm 2
By moving the center of rotation of 2, it is possible to arrange it on a straight line. At this time, the center-to-center distance l shown in FIG. 1 and S shown in FIG. 2 are set equal.

Further, the amount of movement of the reel stand 24 to each cassette position is determined by the arm length and rotation angle of the rotation arm 22. The center-to-center distance l is determined by S shown in FIG. 2 generated by the rotation of the rotating arm 22 and the rotation angle of the first rotating body 260, If the rotation angle is 90 degrees, set 7=S, but if the rotation angle is 180 degrees (however, in this case, the rotation axis 23 for the large cassette must be installed at the position shown in l in Fig. 2). , I.J.
= 3A S should be set. Also, the first rotating body 2
6 and the second rotating body 28 is determined by the rotation angle of the first rotating body and the rotation angle of the rotating arm 22. Further, the rotation direction of the motor 36 may be determined from the reel stand position before switching and the expected position after switching, and may be automatically selected. Furthermore, when the apparatus of this embodiment is provided on the supply side and the winding side, the motor 36, worm 34, worm wheel 36, detection piece 40, and detector 41 may be shared.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described above, there is provided a rotating arm having a reel stand on one side and rotatably supporting the other; The rotating body and this first
a second rotating body that rotates the rotating arm in conjunction with the rotating body, and the first rotating body is arranged so that the reel stand is arranged at three positions on a straight line when the rotating body is rotated. By displacing the center of rotation of the body and the center of rotation of the rotating arm held by this rotating body, three types of cassette tapes whose reel positions change linearly can be processed into one device. It becomes possible to wear the device, and its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a reel table moving device according to an embodiment of the present invention, FIG. 2 is a top view showing the same embodiment in the large cassette position, and FIG. 3 is a state in the medium force set position. FIG. 4 is a top view showing the small cassette position, FIG. 5 is a plan view showing two types of cassettes used in the conventional reel table moving device, and FIG. 6 is the conventional reel table. A plan view showing the moving device, FIG.
022 is a plan view showing the mounting state of the type of cassette;
... Rotating arm, 24 ... Reel stand, 2
6... Reel motor, 26... First rotating body, 28... Second rotating body, 29...
...Intermediate gear, 34.35...Worm and worm wheel, 36...Motor, 38...
...Ball, 41...Detector. Name of agent: Patent attorney Toshio Nakao and 1 other person22
-11-eye movement ar 4 Z4-'l-le white 25--'knoll 7-g 2q--su closed bird wheel me, J,! f---W1-E WHEEM WHEEL J6-
--7-7 3δ-1-r-Role 22-11 Rotation A Figure 2
-1-'knoll b25---Reel mork z6---10 times*f, 1 piece 2δ---1 second rotating body 2Z---1 movement arm 24---Reel stand 3rd Figure 25--- - Reel 7-reel 26 - - First rotating body 2a - '1lZIQIifl# body 29 - Prison gear 22 - m - Rotating arm 24 - m - I Shiro 25 - 11th 2 Rotating Tato 29-11 Intercity Gear Figure 5

Claims (1)

[Claims] A rotating arm that is equipped with a reel stand on one side and rotatably supported on the other side, and a first rotating arm that holds the rotating support shaft of this rotating arm.
a rotating body, and a second rotating body that rotates the rotating arm in conjunction with the first rotating body, and
The rotation center of the first rotary body and the reel table, which is held by the first rotary body, so that when the rotary body is rotated, the reel stand provided on the rotary arm moves through at least three points on a straight line. A reel stand moving device characterized in that the rotation center of the rotation arm is displaced.