JPS6030024B2 - Tape running device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless tape running device used in a fixed head type signal recording and reproducing device.

Endless type fixed head signal recording and reproducing apparatuses record and reproduce video signals and the like by running an endless tape at a high speed of several seconds per second and using a so-called fixed head fixed in the length direction of the tape. In this device, the tape is
The tape is wound on an annular reel having no regulating means in the tape width direction, pulled out from the innermost circumferential portion of the wound portion, guided along a tape guide, and brought into contact with the head.

This head is attached to a tracking device,
Each time the endless tape goes around, it is moved at a constant pitch in the width direction of the tape, recording signals either continuously or intermittently on the tape. The tape that has passed through the head is given running driving force by a capstan and a pinch roller, and after forming slack in a slack reservoir, it is also guided by a guide and wound around the outermost circumference of the wound tape. The part of the tape wound around this reel is supported by rubber rollers, etc. to control the running condition uniformly over the entire layer, to stabilize the running, and to determine the reference position of the tape in the height direction. There is.

However, if the positional relationship in the tape width direction between the support such as a rubber roller and other parts such as the tape guide of the drive unit becomes misaligned, the distribution of tape tension in the tape width direction becomes uneven, and the relationship between the tape and the head becomes uneven. Since the contact becomes unstable, good recording and reproduction becomes impossible, and in the worst case scenario, track deviation occurs and interference from other tracks occurs. In this way, the positional accuracy of the height of the support from the substrate is very important, so when making it into a cassette, incorporating the support into the cassette is extremely important considering the accuracy of general cassettes. It is difficult, and even if it can be incorporated, the structure will be complicated. The present invention has been made in view of the above points, and an object of the present invention is to provide a tape running device that can accurately determine the height position of the tape from the main body when the tape is attached to the main body of the drive device. It is something.

That is, in this invention, a hole is formed in the bottom of a cassette containing a tape wound around a 1'-roll so that a tape support can be inserted therein, while a hole is formed on the drive device main body side in a position relative to other drive mechanism parts. Attach the tape support so that it is in good condition, and when the cassette is loaded into the drive unit main body, the support protrudes from the hole in the cassette wall, lifts the cassette from the cassette wall, and supports the tape at the reference position. The present invention provides a tape running device that has the following features.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows one embodiment of the present invention, and is a plan view when the cassette is loaded into the main body of the drive device (hereinafter referred to as the main body) and the tape is running, showing the top cover and side walls of the cassette. This is an omitted drawing.

In FIG. 1, a tape 2 wound around a reel 1 is pulled out to the inside of the reel through a through hole 3 provided in the reel 1, and guided by a tape guide 4.

A head 6 attached to a tracking device 5 is located in the middle of the tape guide 4, and this head 6 records and reproduces signals on the tape. This head 6 can be moved to any position in the width direction of the tape by the tracking device 5, and therefore one continuous track or a plurality of tracks can be recorded intermittently on the tape. After passing through the tape guide 4, the tape is given running driving force by a capstan 7 rotated by a motor (not shown) and a pinch loaf 9 on a pinch roller arm 8, and is moved between the guide 10 and the roll 1. After forming slack in the slack storage 11, the guide 12 passes over the reel 1 and the tape 2 and winds it up from the outside of the tape 2. At this time, the tape 2 is supported by a rubber roller that protrudes from a lotus hole 14 provided on the cassette bottom plate 13 and is rotatable in the running direction of the tape. Figure 2 shows the tape 2 and rubber roller 15 when the cassette is loaded into the main body.
The cassette loaded in the main body is held by a bucket mechanism (not shown) so that the cassette bottom plate 13 is approximately at the position shown in FIG. 2. At this time, the rubber roller 15 rotatably attached to the bearing 16 protrudes from the passage port 14 provided in the cassette bottom plate and supports the tape 2 in a state where it is lifted from the cassette bottom plate 13 by a distance b. FIG. 3 is a partial sectional view of the cassette removed from the main body. In this state, the tape 2 is supported by the cassette bottom plate 13.

As described above, in this method, keeping the distance a constant from the base plate 17 of the main body to the contact line between the rubber roller 15 and the tape 2 in FIG. Since the reference position of the tape can be accurately determined and the relative position of each support device in the height direction can be made constant, head tracking accuracy can be improved and tape running can be stabilized.

Further, since the dimension b in FIG. 2 has no direct relation to running, it may be determined within a range that does not contact the tape. Therefore, the positioning accuracy of the bucket mechanism for holding the cassette can be made considerably looser, and the bucket mechanism can be simplified. In this example,
A rubber roller is used as a support device for the tape, but
A support material such as a simple metal that does not rotate may be used. The same applies when the fixed reel is a rotating IJ-reel.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tape running device of the present invention, FIG.
FIG. 3 is a sectional view of a partial view thereof. 1...Reel, 2...Tape, 3...
Through hole, 4...Tape guide, 5...Tracking device, 6...Head, 7...Capstan, 8...Pinch roller arm, 9...Pinch roller, 10""" guide,
11...Talumi reservoir, 12...Guide, 13...Cassette waist plate, 14...Touch □, 15...Rubber roller, 16・・・・・・
Bearing, 17... Main board. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. An endless tape wound on a reel, a cassette that stores the endless tape, a communication port provided at one or more locations on the bottom plate portion of the cassette that is in contact with the endless tape winding portion, and the cassette. a drive device main body that is mounted and drives the endless tape to travel;
A tape support body provided on the main body of the drive device for lifting and supporting the tape winding portion from the cassette bottom plate to a ready position through a communication port provided in the cassette bottom plate when the cassette is installed. Traveling device.