JPH03202862A - Automatic original transporting device - Google Patents

Abstract

PURPOSE:To automatically discharge originals at the time of a clear or interruption by discharging the original on contact glass to the outside upon detection that there are no more originals on an original platen and in a standby position. CONSTITUTION:The uppermost original on the original platen 14 is taken in by a roller 18 which swings vertically. Primary paper feeding to a resist roller pair 22 is executed by feed rollers 20. A copying machine is thus ready to copying. The roller 22 rotate to transport the original to the normal position on contact glass 24 when a timing signal comes from the copying machine 12. Then, an original detecting means detects the original platen 14 and the standby position and interrupts a driving source when there is an interruption signal during continuous original processing. A driving source is operated to discharge the original on the contact glass 24 to the outside when there are no more originals. A series of these operations including primary paper feeding, secondary paper feeding, copying, and paper discharging are operated by an operation panel. The original is automatically discharged even if a clear button or interruption button operates.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to w, s ejection processing of an automatic document feeder that corresponds to clearing and interrupt processing of a copying machine.

(□104) The automatic document feeder automatically feeds the originals one after another to the correct position on the contact glass of the copying machine when copying a large number of originals in succession. The documents are taken out one by one from the stack placed on the table and first placed at the next paper feed position by paper feed rollers.The originals are positioned at this next paper feed position, and then by the registration rollers from the copying machine. The secondary paper feed is performed at the correct position on the contact glass.The copied original is ejected to the copied original table by the original ejection mechanism, and the next original at the -next paper feeding position is placed on the contact glass. The document placed on the document table is fed to the primary paper feeding position.When a large number of documents are to be continuously copied, such a cycle of document conveyance operation is repeated one after another.

Conventionally, each of these stages (-next paper feeding, secondary paper feeding, paper ejection) was performed by separate drive systems, but with the downsizing and cost reduction of devices, secondary paper feeding and paper ejection have been performed in one drive system.
Some systems are emerging that can be covered by a single drive system.

On the other hand, in case you want to stop copying in the middle of continuous copying of a large number of originals using an automatic document feeder, or want to copy a special original in an interrupt manner, the copier has a clear button and an interrupt button. It is equipped.

When attempting to clear or interrupt the process, the operator must remove the stack of uncopied originals on the document table of the automatic document feeder, but the stack of copied originals on the contact glass will be removed automatically. It is desirable that the paper can be ejected using the automatic paper ejection function of the document conveying device. However, in the case of an automatic document feeder that performs secondary paper feeding and paper ejection at the same time using one drive system, when attempting to perform such automatic paper ejection, the next document that has already been fed to the primary paper feeding position will contact the Since the sheets would be sent onto the glass, such automatic ejecting operation could not be performed.

The present invention solves these problems and provides an automatic document feeder that can automatically eject the document on the contact glass at the time of interruption even if it has such a transfer mechanism. The purpose is to

゛ In order to achieve the second above-mentioned object, in the automatic document feeder according to the present invention, the document that has been primarily fed from the document table to the standby position is secondary fed from the standby position onto the contact glass of the copying machine. In an automatic document feeder that discharges a document from a contact glass to the outside using a single drive source, a document detection means detects the presence or absence of a document on a document table and a standby position, and an interrupt signal is received during continuous document conveyance processing. and a discharging means for activating the drive source and ejecting the original on the contact glass to the outside after detecting that there is no original on the original table or standby position. It is characterized by

When an interruption signal is received from the copying machine during continuous document conveyance processing, the interruption means stops the document conveyance operation.

Therefore, when the operator pulls out the uncopied i-document on the document table and the document that is in the standby position after the next sheet feeding, the document detecting means detects this, and the document ejecting means activates the drive source. .

As a result, only the copied original on the contact glass of the copying machine is ejected. Therefore, another document can be copied immediately thereafter, and the uncopied document will not be ejected during continuous copying.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 2 shows an external appearance of a copying machine 12 equipped with an automatic document feeder 10 according to the present invention. The automatic document feeder '3110 takes out documents one by one from a stack of multiple documents set on the document table 14, and transfers them to the contact glass 24 of the copying machine 12.
Place it in the correct position above. After the copying force 9 has been applied, the original is guided to the copied original table 16 on the upper part of the automatic document feeder 10. An operation panel 23 is provided on the front of the copying machine 12, and includes a continuous copy button 25 and a clear button 27.
and an interrupt button 29.

FIG. 3 shows the internal structure of the automatic document feeder 10.

The uppermost document on the document table 14 is taken in by a roller 18 that swings up and down, and primary feeding is performed by a paper feed roller 20 to a contact line of a pair of registration rollers 22.

In this state, when a timing signal is received from the main body of the copying machine 12, the registration rollers 22 rotate to feed the original into the gap 28 between the contact glass 24 and the conveyor belt 26, and the conveyor belt 26 transports the original onto the contact glass 24. Transport it to the position.

After the scanning of the optical system 30 for copying the document on the contact glass is completed, when a timing signal is sent from the copying machine 12 to the automatic document feeder 10, the conveyor belt 26
sends the original to the original ejection mechanism 32 on the left side of FIG. 3, and the original ejection mechanism 32 further ejects the original onto the copy groove original platen 16. At this time, the next document that has been waiting at the pair of registration rollers 22 due to the second sheet feeding is secondly fed onto the contact glass 24 by the above operation, and immediately after that, the next document on the document table 14 is placed on the document table 14. The original is registered roller pair 2
The primary paper is fed up to point 2.

In the above mechanism, the registration rollers 22 and the conveyor belt 26 are driven by one motor 35 (FIG. 1). Further, a document sensor 31 for detecting a document is provided at the leading end of the document table 14 .

FIG. 1 shows the configuration of the control system of the copying machine 12 and the automatic document feeder 10. The copying machine 12 has f! ilf# device (C
PU) 13 and an operation panel 2 connected thereto.
In addition to controlling the overall operation of the copying machine 12 in accordance with the operations of the above-mentioned buttons 25, 27, 29, etc. on the 3, it also sends and receives timing signals, etc. related to copying and document transport with the automatic document feeder 10. . A control device 11 is also provided within the automatic document feeder 10, which receives signals from the document sensor 31, sends and receives signals to and from the control device 13 of the copying machine 12, and controls the feed roller 20, The motor 35 that drives the registration roller 22 and the like is controlled.

When the continuous copy button 25 on the operation panel 23 is pressed, the control device 13 of the copying machine 12 controls automatic document feeder I.
In cooperation with the control bag ff1ll of O, a series of operations such as secondary paper feeding, secondary paper feeding, copying, and paper ejection are automatically performed on a large number of originals on the original platen 14. When the clear button 27 or the interrupt button 29 is pressed during this continuous copying, the control device 13 of the copying machine 12
A signal to that effect is sent to the control device 11 of the automatic document feeder 10, and in response to the signal, the control device 11 of the automatic document feeder 10 performs processing as shown in FIG.

First, in step #lO, a copy prohibition signal is sent to the copying machine 12 to prohibit the copying operation in the copying machine 12.

Next, in step #12, the document table 14 and the next paper feeding position (
The document sensor 31 checks whether there is a document (immediately in front of the registration roller 22). When it is detected that there is a document in any position, in step #16, the indicator lamp on the operation panel 23 is lit to prompt the operator to remove the uncopied document. Only when the document is removed from the table and the next paper feeding position does the process proceed to step #14, where the drive motor 35 is rotated and the document on the contact glass 24 is ejected. At this time,
The registration roller 22 driven by the motor also rotates, but since there is no original at the -next paper feeding position, only the copied original on the contact glass 24 is ejected.

At step #18, it is checked whether or not the ejection operation has been completed, and when it has been completed, a copy permission signal is sent to the copying machine 12 (step #2o), and this routine is ended. This stops continuous copying, and it becomes possible to copy another document.

As explained above, even with a single drive source document conveying device like the present embodiment, if continuous copying is interrupted midway, only the copied document on the contact glass 24 is ejected. Automatic paper ejection becomes possible. Moreover, at this time, uncopied originals do not mix with the copied originals.

As explained above, according to the present invention, when the clear or interrupt button is pressed during continuous copying, an automatic document feeder that performs primary and secondary paper feeding using a single drive source Even if there is, automatic document ejection can be performed. Furthermore, since uncopied originals are not ejected at this time, it is possible to clearly distinguish between copied originals and uncopied originals, and post-processing is not confused.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a control system of a copying machine system according to an embodiment of the present invention, FIG. 2 is an external view of the copying machine system according to an embodiment, and FIG. 3 is a sectional view showing the inside of an automatic document feeder. , FIG. 4 is a flowchart of processing performed by the control device of the automatic document feeder of the embodiment. 10... Automatic document feeder 12... Copying machine 14... Document table 18... Swing roller 22... Registration roller pair 26... Conveyor belt 11... Control device 13... Control device 16...Copied document table 20...Paper feed roller 24...Contact glass 28...Document insertion gap 30...Scan optical system 34...Top lid 23...Operation panel 27 ...Clear button 32...Document ejection mechanism 31...Document sensor 25...Continuous copy button 29...Interrupt button

Claims (1)

[Claims] (1) For originals that have been primarily fed from the original platen to the standby position,
In an automatic document feeder that performs secondary paper feeding from a standby position onto the contact glass of a copying machine and discharge of paper from the contact glass to the outside using a single drive source, detects the presence or absence of a document on the document table and standby position. an original detecting means; an interrupting means for stopping the driving source when an interruption signal is received during the continuous original conveying process; and an interrupting means for activating the driving source after it is detected that there is no original on the original table or the standby position; An automatic document feeder comprising: a paper ejecting means for ejecting a document on a contact glass to the outside.