JPH0214253B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an automatic document feeder (hereinafter referred to as ADF) that also serves as a document cover of a copying machine.
It's called Document Feeder. ) relates to a device for warning of duplication between an automatically fed document and a document directly set on the document table.

<Prior art and its drawbacks> ADF generally has a document tray for stacking documents,
It is comprised of a document transport section that transports and sets the document to a copying position on the document table of a copying machine, and a document discharge section that discharges and stacks the copied document. If the document transport section is constructed of a white belt or the like that covers the document table and is installed so that it can be opened and closed on the document table, it can also serve as the document cover of the copying machine.

However, with the ADF configured as described above, you open the document cover, set the document directly on the document table, make a copy, and then use the ADF without collecting the document.
If you use the to automatically feed originals, the ADF sensor may detect the original remaining on the document table, determine that the original is jammed, and stop transporting and copying the original. It was hot. For this reason, when copying in which a document is placed directly on the document table and copying using an ADF are used in combination, the above-mentioned troubles often reduce work efficiency.

<Purpose of the Invention> In view of the above-mentioned drawbacks, the present invention provides, when a document is set in the document tray of an ADF before the collection of the copied document is completed, the document is ejected from the document table or a warning of document duplication is issued. An object of the present invention is to provide an automatic document feeder that prevents the above-mentioned troubles.

<Structure and Effects of the Invention> The present invention includes a document tray, a document tray that conveys the document stacked on the document tray to the document table of a copying machine, sets the document at a copying position, and discharges the document set at the copying position. an automatic document feeder comprising: a document conveyance unit having an ejection mechanism; and the document conveyance unit is set to be openable and closable on a document table of a copying machine; document detecting means for detecting a document present on the document tray; and an opening/closing detection means for detecting an open/closed state of the document transport section; and a state in which the document detection means detects the document while the open/close detection means continues to detect the closed state during the copying process and after the copying process is completed. When detected, the document ejection means operates the ejection mechanism of the document transport section, and the previous document detection means detects the document while the open/close detection means continues to detect the open state during the copying process and after the copying process is completed. The present invention is characterized by comprising: warning means for issuing a warning of document duplication when detecting the same.

According to the above configuration, the following effects can be achieved according to the present invention.

Even if you set the original directly on the document table and make a copy, and then set the document on the document tray to use the ADF without collecting the original, the warning means will warn the user of the duplicate document. If the original on the document table can be ejected using the ADF ejection mechanism,
Because the document is automatically ejected, you can
This can prevent the ADF from stopping when it is activated.

<Example> Figures 1A, B, and C are examples of this invention.
1 is a plan view, a front view, and a side view of a copying machine equipped with an ADF. There is an ADF on the document table 4a of the copying machine main body 4.
A document conveyance section 3 is attached to the rear surface of the copying machine with a hinge 3a, and can be opened and closed to the position shown at 3' in FIG. The document conveyance unit 3 includes a conveyance belt (not shown) facing the document table 4a. Since this conveyor belt is white, the hinge 3
By opening and closing using a as a fulcrum, it can also be used as a document cover. A document discharge port 7 is provided on the upper surface of the document conveyance section 3, and a document discharge section 8 and a document regulation plate 9 are installed. Copied originals are ejected and stacked onto the original ejecting section 8 by a document ejecting mechanism installed inside the original transporting section 3 . An opening/closing sensor S2 is attached to the lower surface of the document transport section 3. This open/close sensor S2 is turned on when the document transport section 3 is closed, and turned off when it is opened. By detecting the opening/closing state of the document transport section 3, it is possible to determine whether there is a document after copying is completed. For example, when copying a single-page original, the copying process is generally performed with the original transport section 3 closed, then the original transport section 3 is opened, the original is removed, and then closed. Therefore, when the opening/closing sensor S2 remains on during the copying process and after the copying is completed, it can be determined that the document has not been removed. In addition, when copying thick originals such as books, the original transport section 3
The copying process is performed with the holder 3 opened, and when the original is removed after copying is completed, the original transport section 3 is closed.
Therefore, it can be determined that the document has not been removed even when the opening/closing sensor S2 continues to be off during the copying process and after the copying is completed.

A document feeding section 1 is installed on the right side of the document conveying section 3. A document tray 2 is attached to the document feed section 1, and a document feed port 1a is opened in a portion of the document feed section 1 facing the lower end of the document tray 2. The original set in the original tray 2 is guided from the original feeding port 1a to the lower surface of the original transporting part 3 by a feeding roller (not shown) installed inside the original feeding part 1, and then the original is It is set at the copying position of the copying machine by the conveyance rollers of the conveyance section 3. An operation panel 5 is installed on the upper surface of the document feeder 1, and a mode selection switch, a warning lamp 5a, etc. are attached thereto. The warning lamp 5a is the original platen 4.
This lamp is lit to warn the user when a document is set on the document tray 2 with the document remaining on the document tray 2. Document feed port 1 of document tray 2
A document sensor S1 for detecting the setting of a document on the document tray 2 is installed near a. This document sensor S1 is turned on when a document is set. This document sensor S1 corresponds to the automatic feed document detection means of the present invention.

FIG. 2 is a flowchart showing the operation of the control section of the above embodiment. When the copying machine has completed its preliminary operations and is ready to copy, the copy switch PSW is turned on and the sensor S1 is turned on (the original is placed in the original tray 2) at step n1 (hereinafter, step ni is simply referred to as ni) or n2, respectively. Wait until it determines the setting of If it is determined at n1 that the copy switch PSW is on, since the original is to be copied directly onto the document table, the process proceeds to manual copying operations from n8 onwards.
If it is determined at n2 that the sensor S1 is on, the ADF is used, and the process proceeds to the ADF operation from n3 onwards.

First, the ADF operation for n3 and below will be explained.
At n3, the ADF mode is selected by operating the operation panel 5. n4 determines whether the selection in n3 is ADF mode, and if it is ADF mode,
Proceed to n5 ADF mode operation, and if ADF mode is not selected, proceed to n6 SDF mode operation.
SDF mode means that documents are transferred one sheet at a time to the document tray 2.
This is the copy mode that is set. After the operations of n5 and n6, return to n1.

n8 and below are manual copy operations. At n8, it is determined whether the sensor S2 is on or off, and if it is off, the copying operation is being performed with the document conveying section 3 open. That is, it is assumed that the copy is a thick original such as a book, and the book copy flag F is set to "1".
If sensor S2 is on, document transport section 3 is closed. In other words, the flag F is set to "0" (n8, n9,
n10). After that, the copying operation starts, but at n11, exposure is started, and the process waits at n12 until this exposure is finished. When the exposure is completed and the process proceeds to n13, it is determined whether sensor S1 is on or off, and if it is on, the original on the original platen 4a has not been collected and the original has been set on the original tray 2, so the sensor S1 is set in n18 or below. Proceed to document duplicate processing operation. If it is on, sensor S
The determination at n13 is repeated until n14 determines that sensor S2 is turned off (original transport unit 3 is opened and the original is taken out), and when sensor S2 is turned off, the process proceeds to n15. If it is determined at n15 that the sensor S2 is turned on again (original transport section 3 is closed), the process returns to n1 after the operation at n16. If it is determined at n15 that the sensor S2 is off, the document conveyance unit 3 is not closed, so the process proceeds to n17 and the flag F is determined. If the flag F is "1", a thick original such as a book is being copied with the original transport section 3 open, so the determination of opening of the original transport section 3 in n14 is invalid. Therefore, it is considered that there is still a document on the document table 4a, so the process returns to n13. If the flag F is "0", this is a standby operation until the document transport section 3 is closed after document collection, so the process returns to n15. The operation n16 after n15 is an operation for setting the flag F, which is set when a thick original such as a book is set, to "0" after the original is collected.

The document duplication processing operation for n18 and below will be explained. n18
Then, the warning lamp 5a on the operation panel 5 is turned on to issue a warning of document duplication, and the sensor S2 is determined at n19. If sensor S2 is on, it is determined that there is only one original left on the document table 4a, and if that is the case, it can be ejected by the ADF's original ejection operation, so the original is automatically ejected. Eject (n23), stop warning operation (n24) and return to n1.
If n19 determines that sensor S2 is off, the original platen 4
Since the document left on top a is a thick document such as a book, n20 is used to determine when the user collects the document and closes the document transport section 3 (sensor S2 turns on). If sensor S2 is determined to be on, the warning operation is stopped at n21, flag F is set to "0" at n22, and then n1 is activated.
Return to In the embodiment, S1 is the document detection means, S2 is the opening/closing detection means, n8, n10, n13,
n14, n23 serve as document ejection means, warning lamps 5a, n8, n9, n13, n14, n17, n18 serve as warning means,
Corresponds to each.

If the ADF with the above configuration is used in a copying machine to perform copying, it can be used for both copying that automatically feeds the original and copying that places the original directly on the platen. If a document is placed in the document tray without being collected after copying, a warning will be issued, and if the document on the document table is a single document that can be ejected by the ADF ejection mechanism, it will be automatically removed. Because the document is ejected at
There is no delay in ADF operation.

[Brief explanation of drawings]

Figures A, B, and C are embodiments of this invention.
The plan view, front view, and side view of a copying machine equipped with an ADF, and FIG. 2 are flowcharts showing the operation of the control section of the above embodiment. 2... Original tray, 3... Original transport section, 4a...
...Document table, 5a...Warning lamp, S1...Document sensor, S2...Open/close sensor.

Claims (1)

[Scope of Claims] 1. Includes a document tray and a discharge mechanism that conveys the documents stacked on the document tray onto the document table of a copying machine, sets them at a copying position, and discharges the documents set at the copying position. an automatic document feeder, further comprising: a document conveying section, the document conveying section being set so as to be freely openable and closable on a document table of a copying machine, comprising: document detecting means for detecting a document present on the document tray; an opening/closing detection means for detecting an open/closed state of the transport section; and when the document detection means detects a document while the open/close detection means continues to detect the closed state during the copying process and after the completion of the copying process; a document ejecting means that operates the ejecting mechanism of the document transporting section; and a previous document detecting means detecting a document while the open/close detecting means continues to detect the open state during the copying process and after the completion of the copying process; An automatic document feeder comprising: , warning means for issuing a warning of document duplication;