JPS6023416B2 - magnetic tape device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to magnetic tape reloading, and in particular to means for regulating the tape running position. The object of the present invention is to easily obtain a stable on-track state in which the head tape is in proper contact with the head.

Generally, in the case of a magnetic tape counterfeit with a narrow track width, the reproducing head tends to deviate from the recording pattern of the tape, so highly accurate tape position regulation is required. As a conventional method for regulating the tape position, there is a method called lower layer regulation (also called one-sided regulation). This is done by guiding either the bottom or top end of the tape with the flange of the guide post, etc.
This is to regulate the position of the tape in the height direction. This will be explained in more detail using the tape deck shown in FIG. FIG. 1 is a schematic plan view of a tape deck having a tape running system called a closed loop system, which is currently used in high-end tape decks.

In the figure, 1 is the supply rule, 2 is the winding rule, 3, 4
is a guide roller, 5, 6 is a guide post, 7, 8 is a pinch roller, 9 is a carburetor, 10, 11, 12, 13
1 is a guide post, and 14, 15, 16, and 17 are magnetic heads for erasing, recording, and reproducing. 1 8 has 180 tapes
A rotary roller 19 that rotates and is wound more than once is a tape, and this tape 19 is sent from the supply reel 1 to the take-up reel 2 by the rotation of the capstan 9.

In such a device, heads 14, 15, I6, 17
The heights of the flanges of the guide posts 10, 11, 12, and 13 were adjusted in order to control the tape 19 from being damaged in the height direction.

FIG. 2 is a diagram explaining this height relationship. 10a,
11a, 12a, 13a are upper flanges of each guide post 10 to 13, 10b, 11b, 12b, 13b are lower flanges of each guide post, 20 is a chassis surface, and the height of the flange of each post can be adjusted. The running position of the tape 19 is regulated by this.

That is, in FIG. 2, the tape 19 is attached to the guide post 1.
2 is pressed down by the upper flange 12a,
Lower flange 10b of other guide posts 10, 11, 13
, 11b, 13b. In the conventional lower layer regulation, positioning was achieved based on the lower end of the tape by providing a section such as the guide post 12 that presses down the tape.

However, there are two major problems with such a follow-up method.

One of them is the guide post 12 and the guide post 10.
, 11, and 13 require great precision.
For example, if the guide post 12 is slightly too high and the tape 19 is not pressed down properly, the guide post 13 or 10
, 11, the lower end of the tape may float away from the flange, making the position regulation unstable. On the other hand, if the guide post 12 presses down the tape too much, the tape 19 may bend, bulge, or run over the flange portion, and the tape position regulation is not stable at this time as well.
Therefore, in the past, it took a considerable amount of time to adjust the relative heights of these guide posts. Another problem is that when the width of the tape 19 changes due to dimensional variations,
A phenomenon similar to that described above may occur at the flange portion of each guide post, and position regulation may become unstable.

If the tape width is too wide, the tape will hold down too much,
Conversely, if it is too narrow, the tape will float. Therefore, the permissible range of the width of the tape 19 inevitably becomes narrower, and if high precision lower layer regulation is required, the tape used must be limited. The present invention solves the problems of such conventional methods, and one embodiment thereof will be described below with reference to FIGS. 3 to 5.

The apparatus of this embodiment has the tape running system shown in FIG.
As shown in the figure.

In the figure, 9 is a capstan, 18 is a rotating roller, 18
a is a rubber lining, 18b is a thin groove, and 20 is a chassis. Reference numeral 21 denotes a rotating roller shaft, and the rotating roller 18 rotates about this shaft via a bearing (not shown).

22 is a flange for fixing the shaft 21, and has a cutting edge-like protrusion 22a on its bottom surface.

This protrusion 22a fits into a V-shaped groove 20a provided in the chassis 20. Reference numerals 23 and 24 are mounting screws for adjusting the inclination of the bracket 21, and these screws are screwed into screw holes provided in the chassis 20' through the flange 22. Further, as shown in FIG. 3, in this embodiment, rotation is performed.

- The tape 19 is tilted in such a direction that the upper end of the tape 19 is spread outward more than the lower end of the tape 19. The protrusion 22a serves as a fulcrum when the rotating roller 18 is tilted, and the groove 20a is for positioning the protrusion 22a, which serves as the fulcrum. The condition of the rotating roller 18 is the same as in FIG. 1, and the parts other than the rotating roller 18, the capstan 9, and the guide post 1 are
0, 11, 12, 13, head 14, 15, 16, 17
etc., are all erected vertically on the chassis 20 without being obliquely oblique. FIG. 4 shows the height relationship of the lower demon control according to the present invention.

The rotating roller 18 is slanted so that its upper end comes out toward the front in the figure, so that the tape 19 can be attached to the rotating roller 1.
Along with the rotation of 8, a force moving downward (arrow 19a) is applied. The tape 19 has its lower end connected to the guide post 10,
Lower flanges 10b, 11b, 12b of 11, 12, 13
, 13b, and after that it does not fall any further, allowing stable running. In other words, the lower layer can be controlled without pressing the upper end of the tape with a guide post (12 in FIG. 2) as in the conventional example. Therefore, the upper flange 1 of the guide post 12
2a is no longer necessary, and even if it is removed as shown in FIG. 5, there is no need to replace it, and the height of the lower flange 12b can be made the same as the other flanges 1ob, 11b, 13b.

Note that the downward movement of the tape 19 (arrow 19a) or the so-called lower layer regulating force is related to the oblique angle of the rotating roller 18, but the range of oblique angles at which the lower layer regulation is stable is quite wide. , settings can be easily adjusted.

The coefficient of friction between the rotary roller 18 and the tape 19 also has an effect, and the larger the coefficient of friction, the greater the lower force regulating force can be obtained with a smaller inclination. For this purpose, a rubber lining 18a is provided as shown in the embodiment of FIG. 3, and narrow grooves are provided to further increase the coefficient of friction. As described above, according to the magnetic tape device of the present invention, highly accurate lower calendar regulation of tapes, which has been difficult in the past, can be easily performed.

In other words, in the past, guide posts (
12 in Fig. 2), and it was very difficult to adjust the relative height relationship between the guide posts. However, in the present invention, the guide posts can be of the same height, and the relative height relationship between them is very difficult. No height adjustment is required. Furthermore, since the range of the inclination angle of the rotating roller is wide, if the inclination angle is known in advance through experiments and the width of the rotating roller axis is set, adjustment can be made unnecessary. Moreover, in the present invention, it is possible to directly control the lower part of the bale without attaching the bale axis to the upper flange of the guide post, so the width of the upper and lower flanges of the guide post does not have to be determined with high precision, and the upper flange can be removed. Therefore, in the present invention, unlike conventional tape widths, the permissible limit of tape width accuracy is widened, and variations in tape width can be ignored. The present invention can thus provide a magnetic tape device equipped with extremely effective tape lower layer regulating means.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a tape running system of a magnetic tape device, FIG. 2 is an explanatory diagram showing the height relationship between a conventional tape and a guide post, and FIG. 3 is a magnetic tape in an embodiment of the present invention. Side view of the rotating rollers and capstan of the device, No. 4
This figure is a diagram showing the height relationship between the tape and the guide post of the same device, and FIG. 5 is a diagram showing the height relationship between the tape and the guide post in another embodiment of the present invention. 10-13...Guide post, 18...Rotation o
-Ra, 25-28...Guide post. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1 A capstan and a first pinch roller that press and drive a magnetic tape led out from a supply reel, and the driven magnetic tape is wound around it, rotates as the magnetic tape runs, and rotates in the direction of the capstan. A rotating roller that reverses the magnetic tape, a second pinch roller that presses the magnetic tape from the rotating roller against the capstan and drives it toward the take-up reel, and a second pinch roller that contacts the magnetic tape between the capstan and the rotating roller. A magnetic head is provided, and a plurality of guide posts are provided near the magnetic head and have flanges that come into contact with either the upper end or the lower end of the running magnetic tape to regulate the running position of the running magnetic tape. A magnetic tape device configured so that the inclination of the rotating axis of the rotating roller can be adjusted.