JPH0320919Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a loading ring support mechanism for an automatic tape loading device.

Prior Art Generally, a loading member is moved by the rotation of a loading ring placed around a tape guide drum, and the tape is pulled out of the cassette and loaded onto a predetermined path attached to the tape guide drum. In the device, the loading ring is rotatably supported on its inner circumferential side by three support rollers arranged at approximately equal angular intervals. In this configuration, an unnecessarily large gap is created between the loading ring and the support roller, which causes play in the loading ring and deteriorates the rotational position accuracy of the loading ring, making it difficult to use the loading ring. The problem is that it is difficult to control the mechanism of the automatic tape loading device, and during assembly, it is necessary to fit the loading ring to each of the three support rollers one by one. However, there was a problem that the assembly work was troublesome.

Means for Solving the Problems Therefore, the object of the present invention is to provide a loading ring support mechanism for an automatic tape loading device that solves the above problems. In an automatic tape loading device in which a loading member is loaded onto a predetermined path in contact with a tape guide drum by rotation of a loading ring, the loading ring is connected to a positioning hole 30.
first and second loading rings 30 and 3 each having inner ring portions 30e and 31b;
1, it has a bearing body 32 comprising a cylindrical body 32a and arm parts 32g extending from this and eventually being cut and removed, and the arm parts 32g are inserted into the positioning holes 30d and 31f.
and by fitting the first and second loading rings 30, 31 to the outer periphery of the cylindrical body 32a, the first and second loading rings and the bearing body 32 are connected to each other. The structure is a combination of the following.

Function: The configuration in which the arm portion 32g integrated with the cylindrical main body 32a engages with the positioning holes 30d and 31f of the first and second loading rings 30 and 31 is such that the first and second loading rings
the rotational position of the loading ring 30 and the second loading ring 30, 31.
This also makes it possible to handle the bearing body 32 as an integrated object.

Even if the lateral pressure of the first and second loading rings is large, the cylindrical main body can sufficiently receive this pressure.

Embodiment Next, an embodiment of the loading ring support mechanism of the automatic tape loading device according to the present invention will be described.

First, referring to FIG. 1, an automatic tape loading device (recording/reproducing device) 1 to which the loading ring support mechanism of the present invention is applied will be schematically explained. In the figure, 2 is a main chassis, 3 is a sub-chassis on the main chassis, 4 and 5 are loading poles, 6 is a tape cassette, 7 is a guide drum with a video head, 8 is a supply reel disk, and 9 is a take-up reel disk. be.

When the recording or playback operation is performed, the loading ring (described later) rotates and the loading pole support 1
0 and 11 are guide grooves 12 of the sub chassis 3, respectively.
13, the magnetic tape 14 is stopped by the poles 4 and 5, and is drawn out of the cassette 6. The supports 10 and 11 are moved to the final position where the poles 12 and 13 are pressed against the stoppers 15 and 16, respectively. Following the movement of the support base 10, the tension arm 17 is rotated counterclockwise by the spring 18, and the brake band (not shown) is tensioned. In addition, the pinch roller 19 is moved to the capstan 2 due to the operation at the final stage of the tape loading operation.
Crimp to 0.

As a result, the magnetic tape 14 is pulled out from the supply tape roll 21 in the cassette 6, comes out of the cassette 6, comes into contact with the tension pole 22, the erasing head 23, and the impedance roller 24, and is held against the guide drum 7 at a predetermined angle. The tape is attached in a spiral manner over a range, attached to the audio control head 25, and entered into the cassette 6 to form the tape winding body 2 on the winding side.
6 tape passes are loaded. The magnetic tape 14 also includes a pinch roller 19 and a capstan 20.
The guide drum 7
A video signal is recorded or played back by the video head while the vehicle is traveling along the vehicle.

Next, the loading support mechanism according to the present invention will be explained with reference to FIG. 2 and subsequent figures.

As shown in FIGS. 2 and 3, the loading rings 30 and 31 are fitted around a cylindrical bearing member 32 and are rotatably supported in a concentrically stacked manner. , is mounted on the main chassis 2 in a plan view so as to surround the guide drum 7.

Figure 4 A and B are the upper loading ring 3
0, FIGS. 5A, B, and C show the lower loading ring 31, and FIGS. 6A and B show the bearing member 33. Loading rings 30, 31 and bearing member 32
are both polyacetal or PBT resin molded products containing glass fiber, and have sufficient rigidity.

The upper loading ring 30 is shown in Fig. 4A.
As shown in FIG. 2, the slide plate 33 is mounted with a pin 33a on one side thereof fitted into an elongated hole 30a on the ring 30, and biased by a spring 34 in the direction of arrow _A2 . This slide plate 33 has a pin 33a
is guided by the long hole 30a and the inner end surface 33b is guided by the inner peripheral ring part 30b of the ring 30, so that it can slide along the ring 30. Further, the hanging pin 11a of the support stand 11 is fitted into the letter-shaped elongated hole 33c of the slide plate 33, so that the slide plate 33 and the support stand 11 are connected (see FIG. 3).

The lower loading ring 31 is shown in Fig. 5A.
As shown, a slide plate 35 is attached in the same manner as the slide plate 33 described above. That is, this slide plate 35 allows the pin 35a to be inserted into the elongated hole 3 of the ring 31.
1a and the inner peripheral end surface 35b is connected to the ring 31.
It can slide along the ring 31 against the spring 36 while being guided by the inner circumferential ring portion 31b of the ring 31 . Further, the hanging pin 10a of the support stand 10 is fitted into the L-shaped elongated hole 35c of the slide plate 35.
and a support stand 10 are connected (see FIGS. 2 and 3).

Furthermore, two operating pins 37 and 38 are implanted at predetermined positions in the lower loading ring 31. Further, on the lower surface of the lower loading ring 31, as shown in FIG. It has been formed. Since the ring 31 is a resin molded product, the cam 3
1c and 31d can be easily formed.

As shown in FIGS. 6A and 6B, the cylindrical bearing member 32 has a screwing protrusion 32 on the cylindrical main body 32a.
b, 32c, 32d, mounting positioning protrusion 32
e, a claw portion 32f for temporary fixing, and an L-shaped arm portion 32g for positioning the ring attachment.

As shown in FIGS. 2 and 3, the bearing member 32
The protrusions 32e are fitted into the small holes 2a of the main chassis 2, the claws 32f are engaged with the small holes 2b of the main chassis 2, and the protrusions 32b to 32d are screwed into the screws 39a to 39a after being positioned and temporarily secured. 39c
It is fixed with screws. The loading rings 30 and 31 are fitted around the cylindrical main body 32a, and are restricted from moving upwardly by the flange 32h of the bearing member 32, and from being displaced downwardly by the main chassis 2. Rotatably supported. Also, loading rings 30, 31
, the loading pole support stands 11 and 10 are placed in the first position.
The rotation position is set to the position shown by the two-dot chain line in the figure (particularly for the loading ring 31, the rotation position is set to the position shown by the two-dot chain line in FIG. 2). , outer gear 30
c and 31e mesh with loading gears 41 and 42 that are driven to reduce speed by a loading motor 40.

Here, since the bearing member 32 is a cylindrical body, the loading rings 30 and 31 are fitted into the bearing member 32 with extremely little play. For this reason, the loading rings 30 and 31 can set their rotation angle positions more accurately than in the conventional case.
Therefore, the rotation of the loading ring 31 can be used without any problem in setting the mode of the recording/reproducing apparatus.

During the tape loading operation described above, the loading ring 31 is driven by the motor 40 in the direction of the arrow _A1 .
direction, the loading ring 30 is in the direction of arrow _A2 ,
That is, they rotate in opposite directions, and the loading pole supports 10 and 11 move in a direction in which they press against the stoppers 15 and 16. The loading ring 31 rotates to the position shown in FIG. 2 and stops. During the final rotation process of the loading ring 31, the operating pin 37 locks and presses the cam portion 43a of the rotation arm 43 at the rotation position shown by the two-dot chain line. As a result, the arm 43 rotates counterclockwise, the pinch roller arm mechanism 44 operates, and the pinch roller 1
9 is crimped onto the capstan 20. In the process of press-fitting the pinch roller 19 to the capstan 20, the loading ring 31 is provided with a rotating arm 43.
A force is applied in the inner circumferential direction as indicated by arrow F,
The lateral pressure of the loading ring 31 against the cylindrical body 32a increases. However, loading ring 3
Since the bearing member 1 and the bearing member 32 are made of resin with a small coefficient of friction therebetween, the loading ring 31 rotates smoothly even if the above-mentioned side pressure increases. Another actuating pin 38 pushes up the slide plate 45 and the brake on the supply reel disc 8 is released. Furthermore, the loading poles 4 and 5 are each loaded with a spring 3.
6 and 34 to press against the stoppers 15 and 16.

In addition, in order to utilize the rotation of the loading rings 30 and 31 for mode setting of the recording/reproducing device,
It is necessary that the loading rings 30, 31 are assembled at predetermined rotational positions with high precision, and in this embodiment, they are assembled with high precision, as will be described later. 7A to 7D show the process of assembling the loading rings 30, 31 to the cylindrical bearing member 32. FIG. First, as shown in FIGS. A and B, the loading rings 30 and 31 are assembled by substantially aligning their positioning holes 30d and 31f. The loading rings 30, 31 have an inner circumferential ring portion 31b and an inner circumferential ring portion 30e abuttingly engaged with each other,
Independent radial movements are combined in a limited manner. Since independent movement in the radial direction is restricted, alignment of the holes 30c and 30e becomes easy, and the rings 30 and 31 are not separated until they are fitted into the bearing member 32. This makes it easy to maintain the holes 30d and 30f in a stable state in which they are aligned.

As shown in FIGS. B and C of the combined loading rings 30 and 31, the arm portion 32g is connected to the hole 30.
d and 31f, and the rotation angle position with respect to the bearing body 32 is determined, and is fitted around the cylindrical body 32a and temporarily held. This results in
The loading rings 30, 31 are combined with the bearing member 32 to form a subassembly, which is then handled as a loading ring assembly 46, which is easy to handle (see C in the same figure).

The loading ring assembly 46 is positioned using the positioning protrusion 32e, etc., and is temporarily fixed on the main chassis 2, and then screwed in as shown in FIG. 3. After the loading motor mechanism is assembled and the loading gears 41 and 42 mesh with the gears 30c and 31e on the outer peripheral side, as shown in FIG.
The loading rings 30 and 31 are cut and removed at their bases, and the loading rings 30 and 31 are now able to rotate independently. Line C in FIG. 7C indicates a cutting line.

Effects As described above, the loading ring support mechanism of the automatic tape loading device according to the present invention has the following features.

The first and second loading rings can be assembled with high precision.

Since the first and second loading rings can be treated as a substantially integrated unit, the first and second loading rings can be treated as a single unit.
The assembly work for attaching the second loading ring to the device can be performed with good workability.

Since the first and second loading rings are supported all around their inner peripheries, they can sufficiently withstand large lateral pressures. Therefore, in terms of strength, it is possible to utilize the rotational force of the loading ring for mode setting.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the state of an automatic tape loading device to which the loading ring support mechanism of the present invention is applied after the tape loading operation is completed, and Fig. 2 is a plan view of the loading ring support mechanism of the present invention. A plan view showing one embodiment together with a mechanism related thereto;
3 is a longitudinal sectional front view of the loading ring support mechanism shown in FIG.
B and C are plan views of the lower loading ring, respectively;
Vertical side view and view from the bottom side, Figure 6A,
B is a plan view and a vertical front view of the cylindrical bearing member, respectively;
FIGS. 7A to 7D are views for explaining the process of assembling a loading ring assembly by combining a loading ring and a bearing member, respectively. DESCRIPTION OF SYMBOLS 1... Tape automatic loading device, 2... Main chassis, 4, 5... Loading pole, 6... Tape cassette, 7... Guide drum, 8... Supply reel disk, 9... Take-up reel disk, 1
0,11...Loading pole support stand, 14...
...Magnetic tape, 19...Pinch roller, 20...
Capstan, 30, 31... Loading ring, 30a, 31a... Long hole, 30b, 30e,
31b...Inner peripheral ring portion, 30c, 31e...Outer peripheral gear, 30d, 31f...Positioning hole, 31
c, 31d...cam, 32...bearing member, 32a
...Cylindrical body, 32b to 32d...Protrusion for screwing, 32e...Protrusion for mounting positioning, 32f...
Temporary fixing claw part, 32g... L-shaped arm part for ring attachment positioning, 32h... Flange part, 33, 35... Slide plate, 37, 38... Operating pin, 40... Loading motor, 41, 42... Loading gear, 43... Rotating arm, 44... Pinch roller arm mechanism, 46... Loading ring assembly.

Claims (1)

[Scope of Claim for Utility Model Registration] A loading member is moved by rotation of a loading ring disposed surrounding the tape guide drum, pulls the tape out of the cassette, and loads the tape onto a predetermined path attached to the tape guide drum. In the tape automatic loading device, the loading ring has a positioning hole 30.
first and second loading rings 30, 3 each having inner peripheral ring portions 30e, 30b and d, 31f;
1, it has a bearing body 32 comprising a cylindrical body 32a and arm parts 32g extending from this and eventually being cut and removed, and the arm parts 32g are inserted into the positioning holes 30d and 31f.
By engaging with the first and second loading rings 30 and 31 on the outer periphery of the cylindrical body 32a, the first and second loading rings and the bearing body 32 are connected to each other. A loading ring support mechanism of an automatic tape loading device configured as an integral combination.