JPH0286524A - Automatic sheet feeding device - Google Patents

Abstract

PURPOSE:To improve the operability in a sheet automatic feeding device for serial printer by rotating a rotating body in reverse to send back a sheet after the detection of a poor feed of sheet, and then rotating the rotating body in the positive direction again to send out the sheet. CONSTITUTION:When a document or recording paper 1 is inserted to the position of a paper-in sensor 2, a motor is rotated to rotate a cam 9 fixed to a shaft 11 through a gear system to the position shown in the drawing. When an updown lever 8 is lifted interlockingly with this, an updown lever 6 and an updown roller 4 are lowered by the dead loads as shown in the drawing to press the document or recording paper 1. Then, a separate roller 5 fixed to a shaft 12 is rotated clockwise, and a roller 4 is also rotated clockwise by a timing belt 7 to pull the document or recording paper 1. In the case of a feed error, the rollers 5 and 4 are rotated slightly counterclockwise to return back the recording paper 1, and then rotated clockwise again to send out the recording paper 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic sheet feeding device that is capable of separating and feeding a single sheet from a plurality of stacked sheets using a single motor.

[Problems to be solved by conventional techniques and inventions] Conventionally - In boat fishing, so-called serial printers use multiple motors to separate one recording paper from a plurality of stacked recording papers and send it to the recording section. An automatic recording paper feeding device is known.

However, in the conventional apparatus, if the sheet is not fed out normally, this is detected and the apparatus is stopped and an error message is displayed. Therefore, in the conventional apparatus, it is necessary to reload the sheet (recording paper, original document, etc.) after processing the error.

[Means for Solving the Problems] According to the present invention, after detecting a sheet feeding failure, the rotating body is rotated in the reverse direction to once reversely feed the sheet, and then the rotating body is rotated in the forward direction again to feed the sheet. This structure improves operability.

[Embodiment] FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a block diagram thereof, and FIG. 3 is a flowchart.

In the figure, 1 is a sheet to be fed (for example, a manuscript or recording paper), 2 is an actuator-type paper sensor, 3 is a separation plate for separating the manuscript or recording paper 1, and 4 is for pulling in the manuscript or recording paper 1 It is an up-down roller.

Further, 5 is a separation roller for separating the original or recording paper 1, 6 is an up-down arm for raising and lowering the up-down roller 4, and 7 is a timing belt for transmitting the rotation of the separation roller 5 to the up-down roller 4. 8 more
9 is an up-down lever for raising and lowering the up-down arm 6; 9 is a cam for raising and lowering the up-down lever 8; and 10 is an actuator type vapor end sensor. Further, 15 is a sheet stacking table capable of stacking a plurality of sheets.

Here, as shown in FIG. 2, the control section 10 of the apparatus of this embodiment
Each part of 0 and the entire device are controlled by CPUl0I, such as a microprocessor. In addition to this CPU 101, this control unit 100 also includes a CPU 10.
ROM that stores the control program and various data of 1.
102, and a RAM 103 for temporarily storing various data as a work area for the CPU 101. The detection signals of the sensor 2 and the sensor 10 are transmitted to the control unit 10.
0 to control motor A and motor B.

Next, the operation of the apparatus of this embodiment will be explained using the flowchart shown in FIG.

When the original or recording paper 1 is inserted up to the vapor-in sensor 2 (step S1), the motor A rotates (step S2). Then, the shaft 11 is connected via a gear system (not shown).
Rotate the cam 9 fixed to the position shown in the figure. When the up-down lever 8 is lifted in conjunction with this, the up-down arm 6 and the up-down roller 4 move down by their own weight as shown in the figure, and hold down the original or recording paper 1. (Step S3). Next, the motor B rotates (step S4), and the separation roller 5 fixed to the shaft 12 is rotated clockwise via a gear system (not shown) (step S5). and,
The up/down roller 4 is also rotated clockwise by the timing belt 7 (step S6), and the original or recording paper 1 is
trying to draw in. However, if the leading edge of the document or recording paper 1 gets caught on the separation plate 3 and is not sent to the paper end sensor 10, a non-feeding error occurs because it is not sent from the sensor 2 to the sensor 10 within a predetermined time. Step S?).

If a non-feeding error occurs, the motor B is reversely rotated (step S8), the separation roller 5 and the up-down roller 4 are slightly rotated counterclockwise, and the original or recording paper 1 is returned to the rear. (Step S9). Then, for example, after the timer is activated and the timer is up (or after the motor B is driven for a predetermined number of pulses), the motor B is again driven in the normal direction (step 11), and both the separation roller 5 and the up-down roller 4 are rotated clockwise. Rotate (step 512
), the original or recording paper 1 is sent out (step 513).

As described above, according to this embodiment, even if a non-feeding error occurs, it is not necessary to manually pull out the document or recording paper 1 and feed it again, thereby improving operability. In this embodiment, a roller is used as an example of the rotating body, but the rotating body is not limited to this, and may be, for example, a belt suspended on a pulley.

[Effects of the Invention] According to the present invention, even if a sheet feeding error occurs, there is no need to reload the sheets, and operability can be improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an automatic sheet feeding device to which an embodiment of the present invention is applied, FIG. 2 is a block diagram thereof, and FIG. 3 is a flowchart. In the figure, 1 is a sheet (original or recording paper), 2 is an actuator-type paper-in sensor, 3 is a separation plate, 4 is an up-down roller, 5 is a separation roller, 6 is an up-down arm, 7 is a timing belt, and 8 is a Up/down lever 9 is a cam, and 10 is an actuator type paper end sensor.

Claims (1)

[Claims] (1) An automatic sheet feeding device for feeding out sheets, which includes a first rotary body that can be raised and lowered to feed out the sheets, and a rotating body for separating and feeding the sheets sent out by the first rotating body one by one. a second rotating body; a detection means for detecting a sheet feeding failure; and after the detection unit detects the sheet feeding failure, the first rotating body and the second rotating body are once rotated in the reverse direction; An automatic sheet feeding device comprising: a control means for controlling normal rotation again;