JPS6063758A - Magnetic recorder and reproducing device - Google Patents

Abstract

PURPOSE:To stably perform reverse running of a tape, by constituting the titled device in such a way that the reel table and motor are united in one body and the motor torque can be controlled by using a control means and, at the same time, intensifying the tape running control force by giving a prescribed angle to a guide post for controlling tape at the time of reverse running of a magnetic tape. CONSTITUTION:By giving an inclination of a minute angle to a guide post 10 for controlling tape at the time of reverse running in the directions shown by arrows Y and X, the controlling force to the bottom flange section 13 of the guide post 10 is intensified and the running of a tape between the guide post 10 and guide post II12 is prevented from varying. The height of the guide posts 10 and 12 is set so that the post 10 can control the lower part of a tape and the other post 12 can control the upper part of the tape. By giving such a small angle to the guide post for controlling tape at the time of reverse running in the direction of length of the tape, the tape control force is intensified and stable tape running can be obtained even when a tape is run in the reverse direction.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetic recording and reproducing device, and in particular, a reel stand and a motor are integrated, the motor torque can be arbitrarily controlled, and the device has a reverse reproduction function. It is suitable for use in magnetic recording and reproducing devices.

Conventional configuration and its problems In conventional magnetic recording and reproducing devices, since one reel motor is under constant torque control, the tape winding tension during forward running varies depending on the difference in the winding diameter at the beginning and end of winding. occurs. The table in which the minimum required winding torque at the end of winding is determined and the winding tension at the beginning of winding are automatically determined. When the winding tension at the beginning of winding is high and the tape regulating force of the guide post for the purpose of regulating the tape during reverse running is strengthened, tape damage occurs and it is impossible to strengthen the tape regulating force. In addition, since the tape regulating force during reverse running is also weak, tape running during reverse running is also unstable, which is a rare drawback.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks, and provides a magnetic recording/reproducing device in which a reel stand and a motor are integrated and the torque control of the motor can be arbitrarily varied. The purpose is to strengthen the regulating force of the tape by giving it an angle, thereby making it possible to stabilize the reverse run.

Structure of the Invention In order to achieve the above-mentioned object, the magnetic recording/reproducing device of the present invention transfers a magnetic tape running by friction drive between pinch rollers that are pressed against a rotating capstan shaft with a predetermined pressure to a take-up reel stand. It is wound up with a predetermined torque. (In the case of reverse running, the opposite is true.) A guide post for regulating the tape during reverse running is arranged between the capstan and the tape path of the take-up reel stand, and the guide post has a predetermined angle. The configuration is as follows. Further, the reel torque of the take-up reel table is provided with a means for varying the reel torque, and the control means is configured such that the change in tension due to the difference in tape width is zero in both forward and reverse running.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is a schematic diagram of the tape running path of a VTR. 1 is a supply reel stand, 2 is a take-up reel stand,
6 is a layout diagram of a rotary cylinder 7, an A/C head, 8 a pinch roller, 9 a capstan, and 10 a guide post for tape regulation during reverse running. During forward running, the magnetic tape in the cassette 3 runs in the direction of arrow A from the supply reel stand 3 to the take-up reel stand 2 by the frictional drive of the capstan shaft 9 and the pinch row 28. Also, when loading in reverse, the take-up reel stand 2
The tape is sent from the supply reel stand 1 to the supply reel stand 1. The tape tension during running is kept constant from the capstan shaft 9 to the take-up reel base and from the capstan shaft 9 to the supply reel base 1 by control means (not shown). 2 and the supply reel stand 11/c are each directly connected, and the torque of the motor is controlled so that it remains constant regardless of the presence or absence of a difference in winding diameter. Figure 2 is an enlarged view of the running path of the magnetic tape on the capstan shaft 9, and its arrangement is as shown in the arrow A when running in the forward direction. After being wound, the tape 11 is wound around the rear pinch row 28, which has a relatively low accumulation, and then travels to the winding table 2.

When loading in reverse, the tape 11 is used as the pinch roller 8 with poor accuracy.
After being wound around the capstan shaft 9, the tape moves in the Y direction in the direction of the arrow on the supply reel stand 1. For this reason, tape running during reverse loading is affected by the machining accuracy of the pinch roller 8, and it is difficult to expect ideal tape running. Therefore, for video editing, etc., where the control signals recorded on the magnetic tape 11 are forced to be read by the F/C head 7 even during reverse loading, changes in the tape running during reverse loading will affect the control signal. It becomes unreadable and appears as an error in editing accuracy. Therefore, in the present invention, for the purpose of stabilizing the running of the tape during reverse loading, the guide post 10 for regulating the tape during reverse loading is tilted at a slight angle in the arrow Y and arrow X directions (a taper is also possible). Third
It strengthens the regulating force to the lower part 13 of the tape regulating guide post) 10 and prevents changes in running between it and the guide boss) +112. In this case, the tape regulating guide post 10 serves as the tape regulating guide post 1j1.
In the second part, the height of each guide post is set so as to be regulated on the tape (even in reverse) By making the regulating guide post have a slight angle with respect to the vertical plane in the longitudinal direction of the tape, the tape regulating force can be strengthened and stable tape running can be obtained even when the tape is running in reverse.

[Brief explanation of the drawing]

The drawings show a magnetic recording/reproducing device according to an embodiment of the present invention, and FIG. 1 is a plan view of the overall tape running path arrangement, and FIG.
The figure is a detailed plan view thereof, and FIG. 3 is a detailed side view thereof. 1... Supply reel, 2... Take-up to the top 8... Pinch roller, 9... Capstan shaft, 10... Reverse running Guide post for tape regulation during loading, 11...Magnetic tape, 12...
Guide post, 7...A/C head O

Claims (1)

[Claims] The reel stand and the motor are integrated, and the motor torque can be controlled using a control means, and
A magnetic recording and reproducing device is characterized in that a guide post for regulating the tape during reverse running of the magnetic tape is provided with a predetermined angle to strengthen tape running regulating force, thereby enabling stable reverse running of the tape.