JPH04129950A - Automatic document feeder - Google Patents

Abstract

PURPOSE:To prevent mixing together of a forgotten document with an automatically fed document bundle by discriminating between the discharged forgotten document and the automatically fed document bundle, by an automatic document feeder(ADF), through a discharge sorting means. CONSTITUTION:A document sorting lever 16 is provided above a tray 14 in a manner wherein the lever 16 is made possible to rise and fall on the tray 14 from the sideward of the paper discharge tray 14, and a motor 17 for driving the lever 16 is connected to the lever 16. When the sorting lever driving motor 17 is rotated in a condition that a document is already provided in the tray 14, the sorting lever 16 is placed on the document on the discharge tray. A document bundle, discharged on and after, is piled on the lever 16 and discharged to the tray 14, so that the document M, before driving the lever 16, can be easily discriminated from the bundle of the document M thereafter.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to an automatic document feeding device that feeds a document to a document reading position of an image forming device such as a copying machine, and more particularly, to an automatic document feeding device that feeds a document to a document reading position of an image forming device such as a copying machine. It relates to a control means for the device.

(I) Conventional technology Conventionally, an automatic document feeder (hereinafter referred to as ADF) was
The copier was used for the following copying operations.

■A1〕F is used instead of the original pressure plate °C, Sea 1~Original V
Copying work in book mode for copying Li ■A I) Set originals on a plurality of sheets 1 in F, and perform copying work in ADF mode 1 to automatically copy them.

(c) Problems to be Solved by the Invention However, in the prior art example, if after copying in Book Mode 1, the next user attempts to copy in ADF mode while leaving the original on the platen, The previous user's original left on the ADF mode 1
~Due to the copying operation, the paper may be transported, causing unexpected jams or being mixed with the next user's original.

For this reason, some proposals have been made to provide the ADF with an ejection mode for misplaced originals, and other drawbacks include the troublesome process for the next user when removing a misplaced original.

Accordingly, one aspect of the present invention is that when a document is copied in the automatic document feeding mode, when a document left behind on the platen is detected, a control means is provided which first automatically ejects the left behind document based on the signal. It is an object of the present invention to provide an automatic document feeding device that prevents jamming and mixing of documents by providing a sorting means for sorting discharged misplaced documents and automatically fed document bundles. be.

(d) Means for Solving the Problems The present invention has been made in view of the above circumstances.
For example, referring to FIGS. 1 to 3, the copying machine (C) is
In an automatic document feeder (1) for setting a document (M) on a platen (11), a detection means (S) for detecting a document (M) on the platen (11) is provided, and automatic document feeding is performed. When feeding the original (M) by mode 1~,
A control means (100, 800) is provided for automatically ejecting the original (M) when the detection means (S) detects the original (M) that has been left on the platen (11). It is characterized by

Further, the present invention is characterized in that means (6) is provided for ejection sorting to distinguish the lost original document (M) from the automatically fed document bundle.

(e) Based on the configuration of the first unit, copy the manuscript (M) to the copying machine (C) J:
Documents are automatically fed to the platen (11), or an operator sets them one by one using a book mode. At this time, when automatic document feeding is performed, if the previous worker or document CM) is left behind on the platen (11), if the detection means (S) detects that No. 48 is sent to the control means. (1
, 00, 800), the document (M) is first automatically ejected.

Furthermore, means (16) distinguishes the discharged left-behind original document (M) from an automatically fed document bundle and discharge sorting.

Note that the symbols in parentheses are for illustrative purposes only and do not limit the present invention in any way.

(f) Example The present invention will be explained in detail below.

FIG. 3 shows the automatic document feeder 1. As shown in FIG.

In the figure, reference numeral 2 denotes a stacking tray 2 on which originals M are loaded. This tray 2 supports the originals M, and is arranged to be tilted downward in the original feeding direction so that the original feeding side is lower. There is. As a result, the fed documents M are stacked together in the sending direction.

4 is a half-moon roller that is rotated in the direction of the arrow to feed the document M to the downstream separation and supply section.If there is no document M in tray 2, it should be stopped with its notch facing one direction. controlled. A feeding roller 5 feeds the document M on the lay 2 to the feeding roller 1 by rotating it in the direction of the arrow.

Further, 6a and 61 are separation rollers, and by rotating the separation belt 6 in the direction of the arrow, the lowest originals M stacked on one tray 2+ are separated one by one between the feeding rollers 5 and 5. To separate. The feeding roller 5 and the separation belt 6 constitute a separation supply section.

3a and 3b are transmission-type photo sensors for detecting the original placed on 1-ray 1; 3a is an LED;
3b and pho 1 are composed of transistors. The document M sent from the separation supply units 5 and 6 is sandwiched between the registration rollers 9a and 9b that are pressed against each other, and is transferred to the platen 11- by rotation of the rollers 9a and 9b in the direction of the arrow.
Sent to 4-. Paper feed sensors 8a and 8b are located at the leading edge of the document,
It is a transmission type photosensor that detects the rear end. The belt 10 on the platen 11 of the copying machine C is attached to an endless pel 1 having a width that covers the entire surface of the sheet original M, and its surface allows the original M to slide on the platen 11 by frictional force in the direction of the arrow. Drive roller 10a and turn roller 1. Ob, the belt 10 and the drive roller 1. Oa is configured to prevent slipping.

The 10th ejection rollers 12a and 12b are pressed against each other, and as the full-surface bell 1-11 moves in the direction of the arrow, the document ejected from the platen 1 is rotated in the direction of the arrow, pinched and transported, and then The document M is held between the 20th ejection rollers 13a and 13b and ejected to the ejection 14. Paper ejection sensor 1
5 is a sensor that detects the leading edge and trailing edge of the document.

A document sorting lever 16, which is a main part of the present invention, is provided above the discharge l-lay 14 so as to be able to rise and fall on the tray 14 from the side of the discharge tray 14 to the discharge tray 14. A driving motor 17 is connected to the lever 16.

Further, the half-moon roller 4, the feeding roller 5, and the separation roller 6a are driven by the motor 7, and the driving roller 10a is driven by the motor 1.
9, the discharge box 1, the 20th-ra 12a, 13
a is driven by a motor 20. An electromagnetic clutch 21 is connected between the resistance 1 to the roller 9a and the motor 7.
An electromagnetic rake 22 is attached to the motor 19 to stop the conveyance of the document M at a predetermined position, and clock discs 23 and 24 are attached to the motors 19 and 20. A bell 1 clock interrupter 25 and a discharge clock interrupter 26 are attached to the disks 23 and 24, respectively.

As shown in FIG. 1, there is a photoreceptor sb consisting of a transistor to photo 1 on the back side of the platen 11 near the original reference point A, and a photodiode Sa consisting of F and D on the side of the ADFI. , a document sensor S is provided.

FIG. 2 shows a circuit block diagram of the automatic document feeder 1.

The circuit 100 is mainly composed of a one-chip microcomputer (hereinafter referred to as microcomputer), and further performs arithmetic control regarding the ADF while exchanging signals with a control 800 of the copying machine C. Microcomputer input capo-1~
■1 to ■4 include signals from the entrance document sensor Sl (3a, 3b in FIG. 3) provided downstream of the aforementioned 1 to ray 2, and a paper feed sensor provided on the document conveyance path. Sensor S2 (
8a, 8b in Fig. 3), paper ejection sensor 83 (15 in Fig. 3),
) signals and the ADF open/close switch signal are each input.

In addition, the microcomputer's interrupt terminal TNT'], INT2
A signal from the heald clock interrupter 25 that detects the rotation of the motor by the clock disk 22 attached to the shaft of the belt drive motor 19, and a signal from the discharge clock interrupter 26 are input to the It serves as the reference clock for the amount of paper feed movement, and is counted by the microcomputer's internal counter.

On the other hand, the output ports 1-01 to 05 of the microcomputer include the aforementioned separation drive motor 7, bell 1 drive motor 19, and electromagnetic loop.
Operation signals of the key 22, paper ejection drive motor 20, and electromagnetic clutch 21 are outputted, and each output load is controlled via each driver.

In addition, signals are exchanged with the controllers 1 to 800 of the copying machine C via cables, and the inputs 15 to 8 of the microcomputer are provided with a document detection signal, a document feed signal, a document discharge signal, and a mode 1 to 800, respectively. The signal is input and output 06 to 0 to capo-1.
7 outputs a C0PY request signal and a document detection signal.

Further, a drive signal for driving the document sorting lever 16 is outputted from the output capo-1-08, and a drive signal for driving the document sorting lever drive motor 1 is outputted.
7 can be operated (example).

Furthermore, a signal is output from the output capo-1-09 to the I-ray switching flapper solenoid 27, and the signal is output from the output capo 1-09 to the I-ray switching flapper solenoid 27.
8 (another embodiment).

FIG. 4 shows a perspective view of the lay 14 to the discharge 1.

When the sorting lever drive motor] 7 is rotated in a state where there is already a document on the discharge 1-lay 14, the sorting lever 16 rides on the document on the discharge 1-ray. The document bundles that are discharged thereafter are piled up on the sorting lever 16 and are discharged onto the tray 14 to the discharge 1, so that the document M before the sorting lever 16 is driven and the document M after the document M are easily separated. It is now possible to distinguish l-J from a bundle.

The operation of this embodiment will be explained with reference to flowchart 1 shown in FIG.

First, it is checked whether or not original M is placed in set 1 among originals 1 to ray 2 of ADFI (step S1). In other words, it's sock mode.

In the case of AD mode, it is checked whether the document detection signal on the platen 11 from the copying machine C is ON, and if it is ON, it is assumed that the document M has been left behind, and in step S2), the drive motor 9 is turned ON to the bell 1. , (step 33) and ejects the second document M from the platen 11 (step S4).

When the discharge is finished, turn on the sorting lever drive motor 17.
l, -r Activate the sorting lever 16 and place it on top of the ejected original so that it can be distinguished from the original that will be ejected later (
Step S5). If the original detection signal is OFF, no original ejection operation is performed (step S6).

Accordingly, when the document feed signal from the copying machine C is turned ON (step S7), the ADF"1 moves to the document feeding operation (step S8), and the document M is placed in the predetermined position on the platen 1"2. When this is reached (step S9), the original is stopped (step S9), and a COPY request signal is turned on to the copying machine (step 510).

In response to this signal, the copying machine starts a copying operation, and when the copying operation is completed, turns on a document discharge signal to the ADF (step 511). With this word, ADFI is connected to platen 11.
''-- is performed, and when the original M passes through the paper ejection sensor and is normally ejected, the original ejection operation ends (step 512).

Next, the ADFI checks again whether or not there is a document M or a document in the document tray 2+- (step 51).
3) If it is set, wait for a document feed signal from the copying machine (step S7), and repeat the above operations. Manuscript M
If all the paper is fed and there are no more on tray 2, the ADF
I ends the operation (step 514).

Next, other embodiments will be described with reference to FIGS. 5 and 6.

In FIG. 5, the document sorting lever 16 of the above embodiment,
Instead of the motor 17, a lay 29 is provided to the auxiliary discharge 1 in the discharge tray] 4, and a lay 29 is provided to the discharge tray 4.
, 13b, this discharge No. 20-ra 3a
, 13b is provided with a flapper 28 for guiding the original M ejected by the 11i-jl to the lay 14 and to the 4J auxiliary drawer 1-lay 29, and a solenoid 27 for driving this flapper 28 is connected to this flapper 28. has been done.

In the flowchart 1~ of FIG. 7 showing the operation, in step S5, the flapper 28 is switched to the output tray 4 or the auxiliary output tray 29 by the solenoid 27, and the other steps are exactly the same. It is.

(1.) As described in detail, according to the present invention, if there is a document left on the platen, the control means automatically ejects the document, and then copies the document using the AD mode. Therefore, A
When copying in the DF mode, there are no left-behind originals, so it is possible to prevent the platen from being damaged.

Furthermore, by distinguishing between the misplaced originals to be ejected and the original bundles automatically fed by A D ], the misplaced originals and the automatically fed bundles of originals can be prevented from being mixed up. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a sensor for detecting a document on a platen according to an embodiment of the present invention, FIG. 2 is a control block diagram of the embodiment, and FIG. 3 is an automatic document feeder according to an embodiment of the present invention. 4 is a perspective view of a lever for document sorting, FIG. 5 is a flowchart of flowcharts 1 to 1 of an embodiment, FIG. 6 is a longitudinal side view of another embodiment, and FIG. 7 is a flowchart thereof. 1... Automatic document feeder, 11... Platen,
16...Discharge sorting means (document sorting lever) 100.
800... Control means (circuit of automatic document feeder, controller of copying machine) C... Copying machine, M... Document S... Detection means (document sensor)

Claims (1)

[Claims] 1. In an automatic document feeder that sets a document on a platen of a copying machine in an automatic document feed mode and a book mode, a detection means for detecting a document on the platen is provided, When the original document is fed in an automatic document feeding mode, when the detection means detects an original document left on the platen, a control means is provided that automatically ejects the original document first. Automatic document feeder. 2. The automatic document feeding apparatus according to claim 1, further comprising discharge sorting means for distinguishing the discharged misplaced documents from the automatically fed document bundle.