JPS6292154A - Reel turn table moving device - Google Patents

Abstract

PURPOSE:To mount >=3 kinds of tape cassettes to a reel turn table device by driving a lock mechanism and a slide base alternately by a planetary gear mechanism connected to a motor so as to have only to increase number of V-shaped slots provided to the slide base. CONSTITUTION:When the position of reel turn tables 23, 23' differs to a loaded cassette, a planetary gear holder 54 driving slide bases 21, 21' is locked by the 2nd brake means to drive the motor and a solar gear 47 at the outside releases the lock mechanisms 35, 35' of the slide bases 21, 21'. After the release, the 2nd brake means 33, 33' and the 1st brake means 64 are changed over and the 1st brake means 64 this time locks the solar gear 47 at the outside to drive the motor and the slide bases 21, 21' in a direction coincident with the cassette reel loaded by the planetary gear holder 54. The 1st brake means 64 and the 2nd brake means 33, 33' are changed over at the position when the reel and the tables 23, 23' are coincident with each other, and the 2nd brake means 33, 33' lock the planetary gear holder 54 this time to turn the solar gear 47 in a direction exerted by the lock mechanism and the slide bases 21, 21' are fixed to the position.

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 runs a tape-like medium to record and reproduce signals, for example.
In particular, the present invention relates to a reel stand moving device configured to allow a plurality of cassettes and throats of different sizes to be attached by moving the position of the reel stand.

2. Description of the Related Art This type of reel table moving device is known, for example, from Japanese Patent Application Laid-open No. 60
It is shown in the publication No.-40645.

Figure 10 shows two parts that are attached and detached from this conventional reel table moving device.
A genus tape cassette is shown. Here, 1 is a cassette holder, 2 is a dog cassette, and 3 is a small cassette. Each cassette is guided to the center of the holder 1 by a convex guide member 4 provided at the center of the holder 1.
They are mounted face-to-face, and the center of the reel is the dog cassette and throat at a and a', and the small cassette at b and b'. Therefore, when a single-car cassette is selectively used, it is necessary to move the reel stand position, and a reel stand moving device for this purpose is shown in FIG.

Here, 5.5' is the reel and drive motor (not shown)
It is a sliding table equipped with a reel unit (not shown) directly connected to the guide body 6.6' and the sliding table 5.5'.
It is held slidably in the directions of arrows c and d by a pair of guide bodies (not shown) that face each other with a gap between them.

The sliding table 5.5' is the side wall e of the guide body 6.6'.

The reel stand (not shown) is arranged at the reel center positions a, a', b, b' of the large cassette 2 and small cassette 3 shown in FIG. 1o while in contact with f, g, and h. It has been done. In addition, a worm 8.8 directly connected to the motor 7
The worm wheel 9.9' which engages with the worm wheel 9.9' is interlocked via a tension spring 12.12' with a pivoting lever 11.11' which is coaxially supported on the main shafts 10 and 10'. The other end is secured to a pin 13.13' provided on the worm wheel 9.9'. Further, the pins 14, 14' provided at the other ends of the rotating levers 11°11' have suppression levers 15, 1
5' is rotatably attached, and the other of the suppression levers 15, 15' is attached to a tension spring 17, 17 on a pin 16, 16' provided on a sliding table 5.5'.
' It is pressure-welded. The worm wheels 9 and 9' are rotated in opposite directions by worms 8 and 8' which are geared in opposite directions, and a convex portion 18 provided on the outer periphery of the worm 9 operates the micro SWs 19 and 20. The motor 7 is configured to stop. For example, the movement until the micro SW 19 operates is as follows: the motor 7 rotates clockwise, the rotating levers 11, 11' move the sliding bases 6, 6' towards the walls g and h, and then the micro SW 19 Rotate until it works, tension spring 12
, 12' to place the reel stand at the small cassette position. After that, when the motor 7 is rotated counterclockwise, the rotating lever 11.11' moves the sliding table 5.5' to the walls e and f, and then the tension screws 17, 1
When pressed and held at 7', the micro 5W20 operates, the motor stops, and the reel stand is placed at the large cassette position.

In the conventional reel stand moving device configured as described above, when the large cassette 2 is first inserted into the holder 1, the cassette type detection means (not shown) detects the large cassette and determines whether the reel stand is in that position. Micro 5W19,20
It is determined by the operating state (19 is the operating time cassette position),
If the cassette is in the small cassette position, the motor 7 is rotated counterclockwise to move it to the large cassette position, and then the holder 1 is moved and the large cassette 2 is mounted on the reel stand. Further, the same operation is performed when inserting the small case/soto 3.

Problems to be Solved by the Invention However, since the reel table moving mechanism with this configuration uses both side walls of the guide body as stoppers, it is not possible to hold the sliding table 6.5' in three or more positions. There is a problem that different cassettes cannot be used.

In view of this, an object of the present invention is to provide a reel stand moving device that can hold a sliding stand equipped with a reel stand at three or more positions.

Means for Solving the Problems The present invention provides a pair of sliding bases each having a reel base and a plurality of engaging parts, a locking mechanism that engages with the engaging parts and holds the sliding base fixedly; A planetary gear mechanism that interlocks the motor with the inner sun gear, a tenth braking means that acts on the sun gear on the outside of this planetary gear mechanism, and a planetary gear holder that rotates integrally with the planetary gear shaft. a second braking means for interlocking the sliding base and the planetary gear holder, as well as the outer sun gear and the locking mechanism;
This reel table moving device is constructed such that the braking means act alternately.

action The effect of this technical means is as follows.

If the position of the reel base is different with respect to the inserted cassette, the planetary gear holder that drives the sliding base is locked by the second braking means, the motor is rotated, and the sun gear on the outside is slid. Release the locking mechanism of the stand. After the release, the second braking means and the first braking means are switched, and the first braking means locks the outer sun gear and rotates the motor.
Move the slider in the direction that matches the reel of the cassette inserted using the planetary holder. Then, at the position where the reel and the reel stand match, the first braking means and the second braking means are switched, and the second braking means locks the planetary gear holder and locks the outer sun gear as described above. The mechanism rotates in the direction in which it acts and holds the sliding table fixed in that position.

Embodiment FIG. 1 shows a plan view of a reel table moving device in an embodiment of the present invention. In Figure 1, 21.21
' is a sliding table) It has a motor 22.22' and a reel table 23.23'. This sliding table 21, 21'
has guide rods 24, 24' and 25.25' on both sides.
passes through the guide rod, and each guide rod has both ends connected to the pedestal 26.2.
6' and 27' are fixed at τ, and a cross-sectional view is shown in FIG. Furthermore, a detection piece 28.28' is integrally provided on the sliding table 21.21', and 28 operates a reel table position detector 29.30.31 consisting of 7 phototransistors and a light emitting diode. 3
Operate 2. Each detector turns on and off a solenoid and a motor, which will be described later. Further, the sliding table 21.
21' has a rack 1.1' and three V-shaped grooves,
A lock member 33, 33' having 1, j', k', 1' is integrally provided in the lock arm 36, one of which is rotatably supported by a support shaft 34, 34'. A support shaft 42 provided on the other side of 35'.
One roller 36.36 is rotatably held at 42'.
' engages with the V-shaped groove. Also lock arm 35
．． 35' holds one side of an arm 38.38' which is rotatably held by a support shaft 3 and 37', and the other arm 38.38' has a guide row 239 shown in FIG. It is rotatably held in a bin 40 having a lock arm 35° 36', an arm 38,
38' constitutes a six-section link mechanism. A tension spring 41 is engaged between the support shafts 37, 37', and rotates the lock arm 35.degree. 35' in a direction away from the V-shaped groove. The guide roller 39 is inserted into a cam groove 44 of a cam disk 43 shown in FIG.
3 is an outer sun gear 4 of a planetary gear mechanism composed of an inner sun gear 45, a planet gear 46, and an outer sun gear 47.
7, and these are provided coaxially with the inner sun gear 45.
It is rotatably held by a main shaft 48 which is integrally provided. The main shaft 48 is a bearing 49 provided on the substrate 50.
The motor 51 is rotatably held and connected to a motor 51 by a coupling member 52. The planetary gear 46 is rotatably held by a planetary support shaft 63, and the planetary support shaft 63 is integrated with a planetary gear holder 54 rotatably held by a bearing 49. Further, the cam disk 43 is provided with an elongated hole 55, and a regulating pin 66 is provided on the outer sun gear 47.
passes through the pin 57, and a tension spring 58 is locked between the pin 57 and the spring hook provided on the cam disk 43. Further, a rotation regulating pin 69 is provided on the lower surface of the outer sun gear 4γ and comes into contact with a stopper member 6o provided on the base plate 60.

In addition, the brake arm 6 is rotatably supported on a support shaft 61.
2 includes a brake shoe 63 that presses against the planetary gear holder 54, a brake shoe 64 that presses against the outer sun gear 4a, and an engagement that contacts the rotation regulating pin 59 and stops the rotation of the outer sun gear. A claw 86 is provided, and an arm portion 67 protruding from the through hole 66 of the substrate 50 to the back surface is engaged with the plunger 69 of the solenoid 68. And this brake arm 62 has a spring hook provided on the board 60 with a pin T.
A tension spring 71 is applied between τ and o, and the brake arm 62 is rotated clockwise to hold the brake shoe 64 in pressure contact with the outer sun gear, and the engaging claw 65 is engaged with the rotation regulating pin 59. placed in a position where it can be matched. Also, the solenoid 68 is the plunger 69'f! f: When suction is applied, the brake arm 62 rotates counterclockwise, the brake shoe 64 is released, and the engagement claw 65 also escapes to a position where it does not engage with the rotation restriction pin 59, and conversely, the brake shoe 63 is moved to the planetary position. It is held in pressure contact with the gear holder 64. Further, a protrusion 72 is provided on the outer periphery of the cam disk 43, and a detector 73 consisting of a phototransistor and a light emitting diode is operated at both ends. The detector then turns on and off the solenoid 68 and motor 51. Further, a gear T4 is coaxially provided on the planetary gear holder 54, and gears 75.75' and 76.7 are provided as shown in FIG.
The racks are driven through the racks 6'. When the racks are moved in the directions of the arrows m and m', the tips of the racks come into contact with each other. .33' have different heights as shown in Fig. 3. Fig. 7 shows three types of tape cassettes 7) to be attached to the reel stand device of this embodiment, and 78.3' is a large cassette. The middle cassette 79 has so and so' reels built in, and the small cassette 81 has 82 and 82' reels built in. When installed in a holder (not shown), the The loading member insertion opening 83 is arranged at the same position.The reel stand 22 is located at each reel position at this time.
22' is configured to be movable and fixed.

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

First, place the dog cage 7) shown in Figure 7 in a holder (not shown).
When the device is installed in When the solenoid 68 is turned on and the planetary gear holder 64 is braked to stop it and the motor 61 is rotated clockwise, the outer sun gear 47 rotates counterclockwise and at the same time the cam disc 43 also rotates, so it is guided. The roller 39 is in the cam groove 4
4 in the axial direction of the planetary gear mechanism, and the arm 38
．． 38' rotates the lock arms 35 and 36', respectively, and locks the rollers 36 and 36' into the lock members 33 and 3.
When the protrusion 72 of the cam disk 43 operates the detector 73, the motor 5 is activated by this signal.
Stop 1.

However, although the motor overruns due to inertia, the motor is forcibly stopped at the position where the rotation regulating pin 69 abuts against the stopper member 6Q. Next, when the solenoid is turned off, the brake arm rotates clockwise by the force of the tension spring 71, and the brake shoe 64 comes into contact with the outer sun gear 47 and stops. At the same time, the engaging claw 66 also rotates to a position where the rotation regulating pin 59 comes into contact, as shown in FIG. In this state, when the motor 51 is rotated counterclockwise, the sliding base 21°21'
moves in the directions of arrows n and n' in FIG.
3.23' is the large skein 7) position. Next, turn on the solenoid 68i, press the brake shoe 63 against the planetary gear holder 54, and rotate the motor 51 counterclockwise with the brake shoe 64 and engagement claw 66 released, and the outer sun gear 4 will turn clockwise. The guide roller 39 moves along the cam groove 44 toward the outer periphery of the planetary gear mechanism, and the arms 38 and 38' rotate the lock arms 35 and 35', respectively.
6' into the locking member 33. V grooves j, j' of 33'
engage and stop. When the outer sun gear is further rotated from this state, the regulating pin 56 is separated from the end of the elongated hole 56 as shown in FIG. 6, and the force of the tension spring 41 acts to bias the cam disk 43 clockwise. The protrusion 72 is the detector 73.
When the motor 51 is operated, the motor 51 stops. At the same time, if the solenoid 68 is turned off and the brake shoe 64 is brought into pressure contact with the outer sun gear 47 to stop it, the tension spring 58 is maintained in an effective state as shown in FIG.

The rotational force of the lock arm 35, 35' in this state is as follows. First of all, mouth/tsuku arm 36°35
When looking at the link mechanism composed of the arms 38 and 38', the forces shown in FIG. 8 act on the link mechanism.

The force P pressed by the cam groove 44 generates the force T that pushes the arm 38, and the force that rotates the mouth/trick arm 36 is F. The relationship between P and 2 is F=P.

COSα/2. cos θ. For example, θ
=89°, α=46°, then F given 20. P...
...(1), and a large rotational force F can be obtained with a small force P. Also, the relationship between the force with which the cam disk 43 presses the guide roller 39 and the rotational force of the cam is as shown in Fig. 9. Become. When the cam 43 rotating around the main shaft 48 and the guide roller 39 are in contact at a point P, the tangent lines drawn to the cam contour curve at this point P are Q and Q', the normal lines are R and R', and the guide roller The moving direction of the guide roller 39 is s, s', the cam pressure angle is Φ, and the friction between the guide roller 39 and the bottle 40 is configured to be extremely small.If ignored here, the force acting on the guide roller 39 is the pushing force of the roller. Pressure T and arm 38°38'
The lateral pressure U received from the cam and the normal force V received from the cam at the contact point P
That is. If these forces are in balance, the vector triangle is closed, and the radius vector connecting the cam rotation center of the normal force V and the contact point C (corresponds to s and s' in Fig. 9) The component force W in the right angle direction is the force received from the rotational force of the cam, and if the angle between the normal force V and the force W received from the rotational force is β, then W = V, cos β
, 'r = v, cosΦ, so eliminate V and get W
= T, cosβ/CoSΦ. For example, assuming β=80° and Φ=100, τξ6W...
...(2), and this T is equal to P in Figure 8) Substituting equation (1) into equation (1) yields F=120W, which means that an extremely large pressing force F is applied to a small force W. Obtainable. This force W is set by a tension spring 58. After the reel stand is moved and fixed to the large cassette position as described above, the large cassette is attached to the reel stand. Next, when the medium force set 79 is installed, the reel stand 23, 23' moves from the position of the detector 31 to the position of the detector 32 and is fixed by the same operation as described above.
It is moved to the position and fixed. Here, when detecting the medium force set position, due to the structure of the detector, when moving from the large cassette side, the detector 32 is used, and when moving from the small cassette side, the detector 30 is used to detect the stop position of the reel stand. It is matched. In addition, at each stop position, when the rollers 36, 36' begin to suppress, the sliding table 21.21''i is moved with a strong pressing force to completely close the V-shaped groove and the rollers within the range where they come into contact with the inclined part of the 7-shaped groove. In addition, the rotation ratio of the outer sun gear 47 and the planetary gear holder 64 to the inner sun gear 46, which is the driving node in the planetary gear mechanism, is such that the number of teeth of the inner sun gear 46 is Zl, When the number of teeth of the outer sun gear 47 is Zl and the planet gear holder 54 is first fixed, the outer sun gear 47 becomes Z+/Z2, and the planet gear holder 54 when the outer sun gear 4 is fixed is Z. ,/
When Z1+22 is established and the inner sun gear 45 is rotated by the same drive source, the planetary gear holder 6 is rotated by the outer sun gear 47.
4 has a larger reduction ratio. Therefore, the required torque of the motor 51 can be reduced by driving the slide table, which requires a lower speed and a larger driving force than the locking mechanism, on the planetary gear holder side, which has a larger reduction ratio. There is.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, a pair of sliding bases each having a reel base and having a plurality of V-shaped grooves on the side surfaces, and a lock that engages with the V-shaped grooves to securely hold the sliding base. By having a structure in which the mouth/tuck mechanism and the sliding base are alternately driven by a planetary gear mechanism connected to a motor, the number of V-shaped grooves provided on the sliding base can be increased. It is possible to hold the IJ reel stand in three or more positions with high precision and firmness with good reproducibility, and to mount tape cassettes of three or more sizes on one reel stand device. In addition, the reel stand is moved and locked using the rotational force of the motor, which is torqued up by a speed reduction means consisting of a planetary gear mechanism, so the operation is reliable and stable.

Highly reliable. In addition, by configuring the movement and locking of the reel stand, which operate at different timings, using a single planetary gear mechanism and motor, the device is smaller and lighter.
The cost can be reduced, and its practical effects are great.

[Brief explanation of drawings]

Fig. 1 is a plan view of a reel stand moving device according to an embodiment of the present invention, Fig. 2 is a sectional view of a sliding stand equipped with a reel stand of the same embodiment, and Fig. 3 is a lock provided on the sliding stand. 4 is a sectional view showing the planetary gear mechanism of the same embodiment, FIG. 5 is a plan view showing the gear train of the reel table moving mechanism of the same embodiment, and FIG. 6 is a sectional view showing the height relationship of members. A plan view showing the locked state of the link mechanism of the same embodiment, FIG. 7 is a plan view showing three types of cassette sizes, FIG. 8 is an illustration of the acting force of the link mechanism, and FIG. 9 is an explanation of the acting force of the cam mechanism. 10 is a plan view showing a state in which two types of cassettes used in a conventional reel table moving device are mounted on a holder, and FIG. 11 is a plan view showing a conventional reel table moving device. 21.21'...Sliding table, 23.23'
・・・・・・Reel stand, 33, 33′ ・・・・・・
Lock member, 35°35'...Lock T-arm, 38, 38'...Arm, 43...
...Cam disc, 44...Cam groove, 45...
... Inner sun gear, 46 ... Planet gear, 4
7...Outer sun gear, 64...Planetary gear holder, 62...Brake arm, 63.6
4... Brake shoe, 65... Engagement claw, 68... Solenoid. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4, 5/゛ze1 Ward Bezuka Figure 7 Figure 8 Figure 10

Claims (1)

[Claims] A pair of sliding stands that are equipped with a reel stand and configured to be slidable along a guide body and have a plurality of engaging parts, and a locking mechanism that engages with the engaging parts and holds the sliding stands fixed. a planetary gear mechanism in which a motor is interlocked with the sun gear on the inside; a first braking means that acts on the sun gear on the outside of the planetary gear mechanism; and a planetary gear holder that rotates integrally with the planetary gear shaft. a second braking means acting on the body, interlocking the sliding base and the planetary gear holder, and interlocking the outer sun gear and the locking mechanism, and alternately operating the first and second braking means; A reel stand moving device characterized in that it is configured to operate.