JPS599089B2 - Apparatus for recording signals on a tape-like carrier and reproducing them from the tape-like carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for recording signals on a tape-shaped carrier and reproducing signals from the tape-shaped carrier by a helical method.

In a helical type magnetic tape device, the magnetic tape is wound around a guide cylinder in the form of a helical winding.

This guide cylinder consists of two parts.
A rotating head drum supporting a magnetic head is disposed between these parts. Usually. One of the two parts is
It has a drive motor. For the operation of a magnetic tape device, it is extremely important that both parts of the guide cylinder are made and supported accurately. It is already known to mount both cylinder parts in laterally arranged support elements for precise mounting, in which case the cylinder surface is pressed against the two planar faces of the support element.

However, this type has the disadvantage that the flat surface of the support element has to be produced very accurately and that modification of the individual parts after manufacture is not possible. The aim of the invention is to provide a system that can be manufactured as cheaply as possible, without the possibility of post-manufacturing modifications of the individual parts.

It is intended to provide a bearing for both cylinder halves, which is possible, for example, during an overhaul of the device after wear has occurred. This object is achieved according to the invention by inserting a member with a circular cross section, preferably a guide pin, into a rectangular recess of the receiving part.

Particularly advantageous are needles used as guide pins for needle bearings. This needle is manufactured to a fine grade with very small tolerances, and therefore, during the manufacture of the device according to the invention, manufacturing errors in the device can be easily compensated for by a suitable selection of the guide pin to be inserted. can be compensated. Furthermore, the guide pin can be replaced by a guide pin of larger diameter during overhaul of the device after wear has occurred. According to the invention, it is further advantageous that even if the guide cylinder should be disassembled for inspection, the position of the guide cylinder parts can be reproduced without the need for adjustment.

Of course, adjustments can be made if necessary. It should be noted that in a magnetic tape device having a rotating head drum, the rotating head drum is replaced from time to time, and for this purpose one of the guide cylinder parts must be disassembled.

Furthermore, it has been found through experiments that the contact pressures at the tangent between the guide cylinder and the guide pin as well as at the tangent between the receiving part and the guide pin do not cause deformation beyond tolerance. After disassembly, the parts of the guide cylinder can thus be pressed onto the receiving part by means of the screws without using any other means, as in the case of initial assembly. The invention will now be described with reference to the illustrated embodiments.

In each drawing, the same parts are designated by the same reference numerals. Both parts 1, 1' of the guide cylinder are mounted in a common receiving part 4.

Guide pins 5, 6, 7,
8 has been inserted. Depending on the diameter selected in each case of these guide pins, the parts of the C-guide cylinder are brought closer or closer to the receiving part. For this purpose, a screw 9 is provided, which screws into a corresponding screw hole in both parts of the guide cylinder (only part 1/ is shown for simplicity of the drawing). In order to position the guide cylinder more precisely, a pin 10 is provided, which pin 10 is inserted into a precision bore in the guide cylinder on one side and in a precision bore in the receiving part on the other side (FIG. 2). A head drum 3 with two heads 2 is schematically shown.

When producing deviations of various magnitudes from the ideal value at the top and bottom of the guide cylinder or receiving part,
The guide pins 5, 6, 7, 8 can be replaced by a plurality of relatively short guide pins 7', 7I.

Furthermore, if desired, it is also possible to use balls instead of cylindrical pins, which can likewise be manufactured with the required accuracy for bearing purposes.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, in which FIG. 1 shows a guide cylinder of a magnetic recording device supported in a receiving part, and FIG. 2 shows a side view of the guide cylinder according to FIG. 1 and the receiving part. Figure 3 is a plan view of the guide cylinder and receiving part according to Figure 1.
...Head, 3...Head drum, 4
......Receptor part, 5, 6, 7, 7', 7I, 8
...Guide pin, 9...Screw, 10.
·····pin.

Claims (1)

[Claims] 1. Recording a signal on a tape-shaped carrier by the Hercal method,
and a device for reproducing from a tape-like carrier, wherein a head drum supporting a recording head and a reproducing head is arranged between two parts of a guide cylinder, and said parts of the guide cylinder have a substantially parallelepiped shape. for recording signals on a tape-like carrier, characterized in that a member with a circular cross section is inserted into a square recess of the receiving part 4, in which the signal is supported in a receiving part of the shape and a device for reproducing from a tape-shaped carrier. 2. The device according to claim 1, wherein the guide pins 5, 6, 7, 8 are in line contact with the two surfaces of the rectangular recess and the peripheral wall surfaces of the portions 1, 1' of the guide cylinder, respectively. . 3. Device according to claim 1, in which both parts 1, 1' of the guide cylinder are fastened to the receiving part by screws 9. 4. The device according to claim 1, wherein the guide pins 5, 6, 7, 8 are needles for needle bearings. 5. According to any of claims 1 to 4, both parts 1, 1' of the guide cylinder are each precisely positioned by at least one further radially arranged pin 10. The device according to item 1. 6 A plurality of guide pins 7 in which the guide pins are relatively short.
', 7''. 7. A device according to claim 1, wherein the member inserted into the square recess of the receiving part 4 is a ball. 8. The ball is a ball. 8. A device according to claim 7, comprising a bearing ball.