JPS6025743Y2 - magnetic tape device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a magnetic tape device, and particularly relates to opening and closing of a front window when a reel is attached or detached.

Conventionally, the front door of a magnetic tape device is opened and closed by an operation button or by manual operation.

However, with this method, the door remains open unless the operator closes the door, and external dust may enter the reading head, tape guide mechanism, etc., which are sensitive to dust, and cause reading failures.

In view of the above-mentioned conventional drawbacks, the present invention aims to prevent dust from entering by automatically opening and closing the window, especially closing the window, and to simplify operator operations when loading and unloading magnetic tape. be.

Therefore, the object of this invention is to provide a window opening/closing mechanism for opening and closing the window, a detection means for sending out a detection signal indicating that the magnetic tape is being attached or removed, and a window opening/closing mechanism that is set by an opening instruction signal for the window. This is achieved by providing a timer that sends out an opening instruction signal for the window after a predetermined period of time has elapsed, and a means for cutting off the opening instruction signal from the timer on the condition that the detection mechanism is sending out the detection signal.

This idea will be explained in detail below using figures.

The figure is a configuration diagram of an embodiment of a magnetic tape device based on this invention.

In the figure, 1 is a timer, 2 is an automatic window opening/closing mechanism,
3 is an OR gate, 4 is an AND circuit, 5 is a detection means, 6 is an inverter, a window open command terminal, and a window close command terminal.

In the figure, the window open command is sent to the command terminal t.

When the timer 1 is reached, the window opening/closing mechanism 2 opens the window of the magnetic tape device, and at the same time, the timer 1 is set.

When a window close command comes to the command terminal t2 while the window is open, or when the set timer 1 overflows and a carry signal is generated, the window close signal is sent to the window opening/closing mechanism 2 via the OR gate 3. , the magnetic tape device window closes.

The detection means 5 detects whether the magnetic tape is attached or removed when the window is open, and outputs a detection signal by detecting, for example, the operator's hand. is input to the AND circuit 4 via the inverter 6.

Therefore, if it takes more time than the time set in the timer to load or unload the magnetic tape, or if a window close instruction is output from the terminals by mistake, the detection signal from the detection mechanism 5 will cause the Since the circuit 4 is closed, no input is made to the automatic window opening/closing mechanism 2, and the window does not close.

When the detection signal is no longer output from the detection mechanism 5, the AND circuit 4 is opened, a window close instruction is input to the automatic window opening/closing mechanism 2, and the window is closed.

It is also possible to send commands to each opening/closing terminal of the window using a manual switch.

As described above, according to the present invention, by automatically opening and closing the window, the window is automatically closed after the magnetic tape has been loaded and unloaded, thereby preventing dust from entering.

Furthermore, there is no need for the operator to press an operation button to close the window, thereby simplifying the operation.

[Brief explanation of the drawing]

The figure is a configuration diagram of an embodiment of a magnetic tape device based on this invention. In the figure, 1 is a timer, 2 is a window opening/closing mechanism, 3 is an OR circuit, 4 is an AND circuit 1.5 is a detection means, and 6 is an inverter.

Claims (1)

[Scope of utility model registration request] A magnetic tape device capable of loading and unloading a magnetic tape by opening and closing a window, comprising: a window opening/closing mechanism for opening and closing the window; a detection means for sending a detection signal indicating that the magnetic tape is being loaded and unloaded; A timer that is set by a window opening instruction signal and sends out the window opening instruction signal after a predetermined period of time has elapsed, and means for blocking the timer's opening instruction signal on the condition that the detection mechanism is sending out the detection signal. A magnetic tape device comprising: