JPS61178340A - Automatic paper supply apparatus - Google Patents

Abstract

PURPOSE:To prevent a head taking-out operation from malfunction by automatically changing over an automatic paper supply apparatus to the manual mode when a record paper is on the way of supply in making power supply. CONSTITUTION:When a sensor detects that a record paper is on the way of supply in making power supply, an automatic paper supply apparatus is automatically changed over from the automatic to manual mode. The manual mode signal is generated to the record unit side to stop the head taking-out operation of record paper while the manual mode is indicated on an indicating section. On the basis of this indication, an operator removes manually the record paper on the way of sending, returns it to the normal position and then returns the automatic paper supply apparatus to the automatic mode by the operation of a key switch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an automatic paper feeder, and more particularly to an automatic paper feeder that can prevent erroneous cueing operations.

[Prior Art] An automatic paper feeder is a device that is attached to various recording devices and automatically feeds recording paper to the recording device.

When such an automatic paper feeder is operated in conjunction with a recording device, the recording device must check whether the paper automatically fed to the recording device is in a predetermined position (on the automatic paper feeder side). need to be informed.

Whether or not the recording paper is at a predetermined position on the automatic paper feeder side is determined by detecting the starting edge or the ending edge in the case of sheet paper.

On the recording apparatus side, receiving a signal indicating that the recording paper is at a predetermined position is used as a reference for determining the leading edge of the recording paper or the recording start position (beginning position).

Therefore, if for some reason the recording paper was fed out past the recording detection position on the automatic paper feeder side when the recording device was used last time, when the power is turned on when the recording device is used again, Since the recording device and the automatic paper feeder are in an interlocking relationship, the automatic paper feeder immediately starts operating.

As a result, the recording paper that has stopped mid-feed is immediately detected by the sensor on the automatic paper feeder side, and the recording apparatus receives this detection signal and uses it as a reference for determining the cue position.

Therefore, the recording paper is fed to the wrong position. As a result, normal recording cannot be performed.

[Objective] The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional paper, and has the following objects: (1) to provide an automatic paper feeder configured to prevent malfunctions in the cueing operation; There is.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

Figure 1 and the following diagrams explain one embodiment of the present invention.
The figure shows the state in which the automatic paper feeder and the recording apparatus are connected.

In FIG. 1, the reference numeral 1 is recording paper exemplified as cut sheet paper, and it is in the paper feed tray 3 on the automatic paper feeder side.
The sheets are stacked inside the paper and are sent out by a paper feed roller 2.

The fed recording paper is guided by a paper guide 4 on the recording apparatus side, wound around a platen 5, and fed to a cue position.

A recording head 6 is arranged corresponding to the platen 5.

Note that in FIG. 1, the reference numeral 7 indicates the recording paper that has been guided to the cue position.

Further, a sensor indicated by the reference numeral 8 is a sensor for detecting recording paper, which is provided on the automatic paper feeder side, and detects, for example, that the leading edge of recording paper 1 has been guided to a predetermined position, and detects when the leading edge of the recording paper 1 has been guided to a predetermined position. sends the detection signal to.

On the other hand, FIG. 2 shows a block diagram of a control circuit on the automatic paper feeder side.

In FIG. 2, the reference numeral 8 indicates the sensor described above, the reference numeral 9 indicates the display section, IO indicates the interface section for transmitting and receiving signals to and from the recording device, 11 indicates the control section, 12 indicates the paper feeding unit, and 13 indicates the key. Each control unit 11 is a switch.
are connected to the center and controlled by the control unit 11.

On the other hand, FIG. 3 shows a timing chart during normal paper feeding operation.

In FIG. 3, the reference numeral 14 is the output of the sensor 8, which turns ON when the leading edge of the recording paper is detected.As a result, the recording paper detection signal 15 turns ON, and the interface section 10
The detection signal is transmitted to the recording device side via the recording device.

On the other hand, what is indicated by reference numeral 16 is a cue signal on the recording device side, and after detecting the ON state of the detection signal 15, for example, 0.
After a delay of 2 seconds, the platen 5 is rotated by a predetermined pitch to perform cueing.

Further, the reference numeral 17 is a mode signal, and in this case, since it is the automatic paper feeding mode, a signal of rHJ level is sent out, and the display unit 9 displays this fact.

On the other hand, in Fig. 4, when there is an abnormality, that is, when the power is turned on,
A timing chart diagram when the recording paper is in a state where it has passed the sensor 8 is shown.

In FIG. 4, the same signal portions as in FIG. 3 are designated by the same reference numerals.

In this embodiment, in the case of such an abnormal state,
That is, if the detection signal of the sensor 8 for detecting recording paper is turned ON at the same time as the power is turned on, the mode signal is set to the "L" level, which is the manual mode, as shown in FIG. output to the side.

Then, on the recording apparatus side, even though the sensor detection signal is ON, the mode signal 17 is at the "L" level, so the recording paper cueing operation is stopped.

At this time, since the manual mode is displayed on the display unit 9, the operator manually removes the recording paper that has been fed halfway, returns it to normal, and then operates the key switch 13 to automatically feed the paper. Just go back to mode.

FIG. 5 shows a flowchart of the control at the time of power-on described above.

Of course, if the recording paper is in a normal state even when the power is turned on, the sensor 8 will not detect the recording paper as shown in Figure 4, and normal paper feeding will occur, and the sensor 8 will record until it reaches the predetermined position. When it is detected that paper has arrived, a cueing operation is performed.

In this way, it is possible to prevent a malfunction in the cueing operation when the power is turned on.

In the above-described embodiment, recording paper was detected at the leading edge of the recording paper, but the same control can be performed even if the trailing edge of the recording paper is detected.

[Effects] As is clear from the above explanation, according to the present invention, when the power is turned on, if the recording paper is in a state where its middle is detected by the recording paper detection sensor, the automatic paper feeder Since the system automatically switches to manual mode, it is possible to completely prevent erroneous cueing operations.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention. Fig. 1 is a schematic configuration diagram showing the installed state of the automatic paper feeder, Fig. 2 is a block diagram of the control circuit, and Fig. 3 is a normal paper feeding state. FIG. 4 is a timing chart of signals of each section, FIG. 4 is a timing chart of signals of each section when the power is turned on in an abnormal paper feeding state, and FIG. 5 is a flowchart explaining the control operation when the power is turned on. ■...Recording paper 2...Paper feed roller 3...
・Tray 5...Platen 6...Recording head 8...Sensor 11...Control unit Fig. 1 Fig. 3 Fig. 4 (-de H, 17

Claims (1)

[Claims] In an automatic paper feeder that is installed in a recording device and has an automatic paper feed mode and a manual paper feed mode, if the paper is being fed when the power is turned on, the automatic paper feed mode can be automatically switched to the manual paper feed mode. An automatic paper feeder characterized in that it is configured to be able to.