JPS60182542A - Brake device of reel drive disk - Google Patents

Abstract

PURPOSE:To facilitate an easy operation when the tape winding is started or in an editing mode by connecting two brake arms via solenoids and a spring and actuating only the 2nd solenoid in a reel stop mode to reduce the damping force. CONSTITUTION:Brake arms 48 and 49 attached with a brake band 46 are set rotatably to a shaft 50 and connected by a spring 56. Solenoids 48 and 49 are attached to arms 48 and 49 respectively, and a spring 63 is connected to the arm 48. In such a constitution, only the 2nd solenoid 68 is turned on in a reel stop mode. Thus the damping force is reduced to facilitate an easy operation when the tape winding is started as well as an easy reel operation in a tape editing mode. Then only the solenoid 59 is turned on in a record/reproduction mode, and the damping force is released. Both solenoids 59 and 68 are turned off when the reel is changed to a stop mode from a drive mode. This facilitates an easy tape wind starting operation and an easy editing operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a brake device for a reel stand in a tape running device.

Technical background of the invention and its problems] A conventional brake device for a reel stand will be explained with reference to FIG. 1 and 2 are reel stands rotated by a driving means (not shown); 3 and 4 are tape reels mounted on the reel stands; 5 is tape; 6 is a guide a-ra; 7 is a capstan; and 8 is a tape reel attached to the reel stand. Binge rollers 9 and 10 are brake bands made of thin plates such as stainless steel. One end of this brake band 9 (10) is attached to a spring 11-(12).
It is fixed to the fixed end 11 (12) via M, and the thin end is attached to the arm 13'(14>).

The arm 13 (14) is rotatably mounted around a rotating shaft 19 (20), and has a spring 25 (25) fixed at -6 by a fixing pin 23 (24).
6) Or rotated by solenoid 27 (28). Therefore, when the solenoid 27 (28) does not operate (the state shown in the figure), the brake band 9 (10) is connected to the reel stand 1 (2) via the brake shoe 17 (18).
Since the solenoid 27 is in contact with the
(28) operates, the brake band 9 (1
0) is pushed in the direction of the arrow 33 (34), which means that the tape 50 is running in a so-called brake released state).

By the way, when securing one end of the tape wound on the tape reel 3 to the tape reel 4 via the guide roller 6 and capstan 7, first, the end of the tape wound on the tape reel 3 is locked. You need to pull one end out to an appropriate length () by hand.

However, it is not easy to pull out the tape in this case because the brake device of the reel stand 1 is operating. Particularly when the tape reel 3 is small, it is necessary to manually pull one end of the wound tape and rotate the tape reel 3 by hand. This is because the tape may stretch or break.

In addition, there are cases where the tape 5 is loaded from the tape reel 3 to the tape reel 4, and running of the tape is stopped when only one tape is left, and editing work is performed on the tape, for example.

In such a case, it is necessary to turn the tape reel 3 and tape reel 4 by hand and check the recording position on the tape 5.
Editing work becomes extremely difficult while the brake devices of reel stand 1 and reel stand 2 are operating. The above problem can be solved by weakening the braking force of the brake devices of the reel stands 1 and 2, but this will impair the original function of the brake devices.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a brake device for a reel stand that facilitates tape reel operation during tape loading or tape editing. shall be.

[Summary of the Invention] The present invention for achieving the above-mentioned object has a brake drum that is rotatable together with a reel stand, a brake band wound around the brake drum, and a brake band that rotates according to a biasing force. is in contact with the brake drum, and a first force member that applies different braking forces to the brake drum depending on the direction of rotation thereof, and a second force member that operates against the first force member, and a first solenoid capable of releasing a braking force on the brake drum, and a braking device for a reel stand capable of stopping a rotating reel stand in response to a brake signal inputted from the outside. a second solenoid that operates against the second biasing member when the rotation of the base stops, and attenuates the braking force applied to the brake drum by the second biasing member; , a solenoid control means for driving and controlling the second solenoid and the first solenoid in accordance with the brake signal.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a new view showing the 7j'A combination of the present invention applied to a tape recorder, in which 40 is a panel base, 41 is a reel stand, 42 is attached to the panel base 40,
Further, a motor rotationally drives the reel stand 41, 43 is a decorative panel, and 44 is a shaft that is a reel holder on which a tape reel (not shown) is mounted.

Next, the structure of the brake device for the reel stand will be described with reference to FIG. 3, which is a cross-sectional view taken along the line A-A' in FIG. 2 from above. A brake drum 45 rotates together with the reel stand 41, and a brake band 46 having brake shoes 47 attached to its inner circumference is wound around the outer circumference of the brake drum 45. Brake arms 51 and 5 48 and 49 are respectively attached to an axis 5° and are independently rotatable about this axis 50.
Reference numeral 2 denotes a spring shaft which is attached to the brake arms 48 and 49, respectively, and has a spring; A-53. Both ends of the brake band 46 are locked to brake arms 48 and 49 via link shafts 54 and 55, respectively. Further, 56 is a first biasing member, e.g., a spring, which pulls the spring seats 11 1-51 and 52 together and biases both ends of the brake band 46. 57 and 58 are respectively springs. A stopper 59 is provided with a movable piece 60, and the stopper 59 is configured to limit the amount of rotation of the brake arms 48 and 49 and also limit the tension of both ends of the brake band 46. , and a first solenoid attached to the panel base 4o.The movable piece 6o of the first solenoid 59 is attached to the brake arm 49 by a link 61, and the first solenoid Due to the operation of 59,
The brake arm 49 is adapted to rotate in the direction of arrow 62. M1:, 63 has one end connected to the brake arm 4.
8 (=J 4), and the other end is attached to the panel base 4o via a spring ( ) 64. A second 44 biasing member, for example a spring, It is constantly energized in the direction. Further, one end of 66 is connected to the brake arm 4 through a screw 67.
8, the other end is the second solenoid 68
A third (q-force member, for example, a spring) attached to the six movable pieces of the second solenoid 68 is attached to the panel base 40, and As a result of the operation, the third spring 66 is biased (=1 force) in a direction opposing the second spring 63. Also, 71, 72, and 73 are guide members for the brake band 46, respectively. This guides the brake band 46 so that it spreads uniformly around the outer periphery of the brake drum 45.

Next, the control system of this embodiment will be explained with reference to FIG. 79 shows drive signals 5DP1 and 5 to the first solenoid 59 and the second solenoid 68, respectively.
By outputting DP2, the first solenoid 5
9 and a solenoid drive control means for driving and controlling the second solenoid 68; 80 is an input means on an operation panel of a tape recorder, and a tape running device (not shown);
In relation to a3, a brake signal BP is output to the seven solenoid drive control means.

Next, the operation of the apparatus constructed above will be explained with reference to FIGS. 5 and 6.

FIG. 5 is a plan view showing the main parts of the device shown in FIG. 3, and FIG. 6 is an explanatory diagram for explaining the operation of the device of this embodiment.

First, the first solenoid 59 and the second solenoid 6
8 are both inactive (OFF>) (state 1),
The second spring 63 pulls the brake arm 48 in the direction of arrow G5, and the first spring 56 pulls the brake arm 49
It acts to tighten the brake band 46 through.

Therefore, the brake band 4G is pushed in the direction of the arrow 74, and a braking force acts on the brake drum 45.

The braking horn that moves on the brake drum 45 differs depending on the rotational direction of the brake drum 45. That is, when the brake drum 45 rotates in the direction of the arrow 75, the first spring 56 expands, so that a weak braking force is applied to the brake tram 45. On the other hand, when the brake drum 45 rotates in the direction of arrow 76, the biasing force of the second spring 63 acts, so a strong braking force acts on the brake drum 45.

Next, the first solenoid 59 is in the inoperative state (Em<0FF)
, when the second solenoid 68 is in the operating state (ON> (state 2), the movable piece 69 of the second solenoid 68 moves in the direction of arrow 7.
It moves in the 0 direction and reaches the position shown by the imaginary line 69-, and the third
Since the spring 66 pulls the second spring 63, the force with which the second spring 63 pulls the brake arm 48 becomes substantially weaker.

Therefore, only a weak braking force acts on the brake drum 45 regardless of its rotating direction.

Next, the first five solenoids are in the operating state (ON>, the second
When the solenoid 68 is in the inoperative state (OFF>) (state 3), the brake arm 49 rotates in the direction of the arrow 62 and reaches the position shown by the imaginary line 49', and the first spring 56 is forcibly stretched. It will be done.

Therefore, the brake band 46 is connected to the brake drum 4
5 and expands in the direction of arrow 77, the brake drum/15 rotates freely (braking force released).

Next, states 1 to 3 described above will be explained in relation to tape running.

First, when the tape is in a stopped state between T1 and T2 in FIG. 6 (this means that the reel stand 41 in FIG.
:means not rotated) means 5DR2
only, the level becomes 1 high level, and the device of this embodiment becomes the state 2 described above. However, only the second solenoid 68 is activated (ON), and only a weak braking force acts on the brake drum 45 regardless of its rotating direction. Therefore, since the tape reel (not shown) attached to the reel holder t-J@44 (Fig. 2) can be easily rotated by hand, for example, it is easy to load the tape onto the tape reel or edit the tape. Easy tape reel operation 1! do.

Next, at T2, when playback of the tape or recording on the tape is started, only 5DP1 becomes the "high" level, and the apparatus of this embodiment enters the state 3 described above. That is, only the first solenoid 59 is activated (ON), and the brake drum 45 rotates freely. Therefore, the reel stand 41 is moved at a predetermined speed L along with the tape reel (not shown).
Rotate with SP.

Next, from T3 to T4, when the tape moves from the running state to the stopped state, both 5DPI and 5DP2 are set to "
Therefore, the device of this embodiment enters the state 1 described above. As a result, both the first solenoid 59 and the second solenoid 48 become inoperative (OFF), and different braking forces are applied to the brake drum 45 depending on its rotating direction, thereby stopping the tape in the running state. .

Here, the reason why different braking forces are applied to the brake drum 45 depending on its rotation direction will be explained. When applying this embodiment to a normal tape recorder,
For example, as shown in FIG. 1, the device of this embodiment is attached to each reel stand (1, 2), and the reel stand that is rotating in the tape winding direction is braked by a weak braking force. If the reel stand is rotating in the sending direction, a strong braking force will apply the brakes.
). This is to prevent the tape from loosening when the running tape stops. Therefore,
The brake device for the reel stand is required to have different braking forces depending on the direction of rotation of the reel stand.

Next, after the running tape stops, that is, -1-
Between 4 and 5, only the 5DR2 becomes the "high j level," and the device of this embodiment enters the state 2 (only the second solenoid 68 is in operation).In other words, the brake drum 4
Since only a weak braking force is applied to the reel 5, it is possible to easily operate the tape reel during tape editing, for example.

In addition, at T5, when starting fast winding of the tape, only S U) l) 1 becomes the "high" level, and the device of this embodiment enters the above-mentioned state 3 (the second solenoid 68
only in working condition). That is, the braking force applied to the brake drum is released, and the reel stand 41 rotates at a predetermined speed 1-(SP) together with the tape reel (not shown).

Next, from T6 to 1-7, when moving from the tape running state to the stopped state, the device of this embodiment enters the state 1, as described above, and the brake drum 45 is rotated according to its rotating direction. Different braking forces are activated to stop the tape in running state.

In this way, by controlling the operations of the first solenoid 59 and the second solenoid 68, it is possible to perform tape reel operation when the tape stops running, without impairing the original function of the brake device of the reel stand. Make it easy.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above embodiment, and can be modified as appropriate within the scope of the gist of the present invention.

For example, the third spring 66 shown in FIGS. 3 and 5 may be omitted. That is, the second solenoid 68 is provided on the opposite side of the illustrated position with respect to the brake arm 48,
Install a movable piece 69 of the second solenoid 68 instead of the spring 64, use a sufficiently long stroke for the second solenoid 68, or obtain a sufficient stroke through an arm with a support shaft. However, the same effects as in the embodiment described above can be obtained.

Further, the brake arms 48 and 49 shown in FIGS. 3 and 5 do not have to be configured to rotate about the shaft 50, but may be configured to move in parallel in the directions of arrows 65 and 70, for example.

Furthermore, the first spring 56 and the second spring shown in FIGS.
Spring 63. Although all of the third springs 66 are made up of tension springs, they can also be made up of compression springs. For example, if the first spring 56 and the second spring 63 are provided on the third spring 66 side, a compression spring can be applied. If installed on the side, a compression spring can be applied to the third spring 66.

In addition, the brake seat 47 is connected to the brake drum 45 [Effect of the Invention] According to the present invention described above, when the rotation of the reel stand stops, the braking force applied to the brake drum is attenuated, and the tape reel can be easily rotated. Since it can rotate, it is possible to provide a brake device for a reel stand that facilitates tape reel operation during tape loading or tape editing.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a conventional brake device for a reel stand.
FIG. 2 is a sectional view showing one embodiment of the present invention, and FIG.
FIG. 4 is a block diagram showing the control system of the apparatus of this embodiment, FIG. 5 is a plan view showing the main part of FIG. 3, and FIG. The figure is an explanatory diagram for explaining the operation of the device of this embodiment. 41... Reel stand, 45... Brake drum, 46
...brake band, 56...first spring (first biasing member), 59...
First solenoid, 63... Second spring (20th biasing member), 68...
Second solenoid, 79... Solenoid drive control means, BP... Brake signal. 3rd Figure 59-■ 2 0

Claims (1)

[Claims] A brake drum that can rotate together with the reel stand, a brake band wound around this brake drum, (J
first and second f4 force members that bring the brake band into contact with the brake drum depending on the force and apply different braking forces to the brake drum depending on the direction of rotation; and a first solenoid that operates to release the braking force on the brake drum, and is capable of stopping the rotating reel stand in response to a brake signal input manually from the outside. In the brake device, when the rotation of the reel stand stops, the second urging member operates against the second urging member and attenuates the braking force applied to the brake drum by the second urging member (A). 1. A braking device for a reel stand, comprising: a second solenoid for controlling the brake; and a solenoid control means for controlling drive of the second solenoid and the first solenoid in accordance with the brake signal.