JP2585452B2 - Copier with computer form feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Field of the Invention The present invention relates to a CF feeder (hereinafter referred to as CFF) for conveying a computer form (hereinafter referred to as CF) output from a computer along a document table. And a copier comprising:

(B) Prior Art Printing of data output from a computer generally uses continuous paper (CF) in which holes for feeders are formed at both ends of the paper. As a copying machine for copying the image of this CF, a sprocket is provided near the platen,
There is a printer having a CFF for feeding a CF and setting a page to be copied of the CF in a predetermined area on a document table.

Further, such a copying machine is provided with a sensor for detecting a jam of CF, and when a jam occurs, the occurrence of the jam is displayed on an operation unit on the upper surface of the main body of the copying machine to prompt the user to clear the jam.

(C) Problems to be Solved by the Invention By the way, some copying machines equipped with a conventional CFF automatically feed the remaining CF after copying all pages to be copied of the CF. If the jam sensor is activated at this time, if a jam occurs during the feeding of the remaining CF after the copying process, the jam is displayed, which is inconvenient to be confused with the jam display during the CF operation during copying.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a copying machine which prevents a jam from being displayed even when a jam is detected during the automatic feeding of CF after the end of the CF copying process.

(D) Means for Solving the Problems According to the invention of this application, a means for judging the end of the original document scanning process on the last page of the pages to be copied of the computer form, and an end of the original page scanning on the last page are judged. Means for feeding all the remaining computer forms when the jam occurs, and means for not displaying the jam when the jam sensor detects the occurrence of the jam when feeding the remaining computer forms.

(E) Function In the invention of this application, when a jam is detected while the remaining CF after the copying process is being fed, the occurrence of the jam is not displayed. Therefore, after all the pages to be copied have been scanned, no confusing display of "jam occurrence" is displayed.

(F) Embodiment FIG. 4 is a schematic front view of a copying machine having a CFF according to an embodiment of the present invention.

An original table 1 made of a transparent hard glass body is provided on the upper surface of the copying machine main body. CF is placed in a predetermined area on the platen 1.
Documents such as sheets, sheets, and books are set. An optical system 2 including a light source 2a, mirrors 2b to 2e, and a lens 2f is provided below the original table 1. The original set on the original table 1 is scanned, and the reflected light is transmitted to the photosensitive member 3 of the copying machine main body. Lead to.

An uncopied CF is placed on the upper left of the side of the copier.
A CF mounting table 4 is provided, and a stock table 5 for discharging the copied CF is provided on the right side. A sprocket 6 is provided below the document table 1. The CF is conveyed by the sprocket 6 from the CF table 4 on the left to the stock table 5 on the right. S1 on the left of the document table 1 is a CF end detection sensor for detecting the rear end of the CF.

Around the photoconductor 3, a charging device 7, a developing device 8, a transfer device 9
Is provided. Further, on the right side of the copying machine main body, a paper feeding unit 7 including a paper cassette in which paper is stored is provided. During the copying process, a sheet is fed from the sheet feeding unit 7 to a position between the photoconductor 3 and the transfer device 9, and a toner image is transferred onto the sheet here. This sheet is further conveyed to a sheet discharge section 12 on the left side of the copying machine main body via a fixing device 11 on the left side of the photoreceptor. Reference numeral 12 denotes an intermediate tray portion, which temporarily conveys the sheet on which the fixing process has been completed at the time of double-sided copying or composite copying, and feeds the sheet at the next copying process.
Double-sided or composite copying is performed by feeding paper from the intermediate tray section instead of the paper. At the time of double-sided copying, the sheet on which the image is formed on the front side is turned over by a switchback method and then sent to the intermediate tray section 12. Therefore, at the time of the next image formation, an image is formed on the back side of the sheet.

The sensor S1 is on the left side of the platen 1 and the sensor is on the right side.
S2 is arranged respectively. The sensor S1 is a sensor that detects a CF end, and the sensor S2 is a sensor that detects a CF jam. The sensors S1 and S2 are optical sensors, and are arranged so as to face a feeding hole formed at an end of the CF. FIG. 3 shows the outputs of the optical sensors S1 and S2 during CF transport. The sensors S1 and S2 generate pulses corresponding to the holes 13 provided at the end of the CF. This pulse interval is regular because the holes of the CF are provided at regular intervals. Sensor S1 outputs CF when output is on continuously.
Determine the end. The sensor S2 determines that a jam has occurred when the output is continuously turned on or continuously turned off.

 FIG. 2 is a block diagram of a control unit of the copying machine.

The operation of the copying machine is controlled by the CPU 21. CPU21
Are connected to various sensors such as sensors S1 and S2, various input keys, and an operation unit 22 including a display pulse for displaying a message to the user. Further, the CPU 21 is connected to a sprocket drive system 23, a paper transport system 24, each copying process device (charging device 7, developing device 8 and the like) 25, an optical system 26 and the like.

The operation unit 22 includes a CFF mode setting key 22a, a print switch 22b, a numeric keypad 22c, a display unit 22d for displaying numerical values such as the number of copies, a jam display unit 22e for displaying a jammed portion when a jam occurs, and the like. .

A processing procedure at the time of CF copying processing in the copying machine configured as described above will be described. FIG. 1 is a flowchart showing the processing procedure.

First, the CFF mode is selected by inputting copy processing conditions, and thereafter, when the print switch is operated, the set original is scanned (n1 → n2 → n3). This document scanning is performed for the number of copies set by the numeric keypad 22c (n4 → n3). When the copying process for the number of sheets is completed, the sprocket 6 is rotated to convey the CF, and the next copy page is set in a predetermined area on the document table (n6 → n7 → n8).
At this time, the completion of the setting of the next original is determined by the sprocket 6.
Is detected by the amount of rotation. For example, when copying the next page immediately after the copying, the sprocket 6 rotates by one page feed. For example, when copying the page after three pages, the sprocket 6 rotates by three page feeds. By the way, if the sensor S2 is continuously turned on during this page feed, the rotation of the sprocket 6 is stopped assuming that a jam has occurred, and the jam display section 22e displays that a jam has occurred in the CFF section (n9). → n10 → n11).

The copying operation is repeated in this manner, and when processing of all originals to be copied is completed, the process proceeds to n12, where the sprocket 6 is rotated, and all CF remaining on the CF mounting table 4 is conveyed to the stock table 5 side. (N12 → n13 → n15). The end of copying of all pages of the document is determined by the continuous ON of the sensor S1 (no CF) or, if a copy page is designated, the last page has been copied.

If a jam occurs during winding after the copying process is completed, the winding process is stopped at that point (n14 → n1
Five). However, no jam display is performed in this case. This is because the copying process has already been completed, and thereby it is possible to prevent the misunderstanding that "jam is displayed even though the copying process is completed".
Thereafter, the ready lamp is turned on (n16) to notify the user that the copying machine is in the ready state.

(G) Effects of the Invention According to the present invention, even if a jam occurs in the remaining CF feed after the copy process, the jam is not displayed in that case, and the message "After the copy process has been completed. Despite this, the jam is displayed. "

[Brief description of the drawings]

FIG. 1 shows a C of a copying machine having a CFF according to an embodiment of the present invention.
FIG. 2 is a block diagram of a main part of the copying machine, FIG. 3 is a diagram showing an output state of a sensor for detecting CF, and FIG. 4 is a front view of the copying machine. It is a schematic diagram. 4. CF mounting table, 5 ... Stock table, 6 ... Sprocket, S1, S2 ... CF detection sensor.

Claims (1)

(57) [Claims] 1. A copying machine comprising: a jam sensor for detecting a jam of a computer form conveyed along a document table; and means for displaying a jam on an operation unit when the jam is detected by the jam sensor. Means for determining the end of the document scanning process on the last page of the pages to be copied of the form; means for feeding all the remaining computer forms when the end of the document scanning on the last page is determined; the remaining computer Means for not displaying a jam when a jam occurrence is detected by the jam sensor during feeding of a form; and a copying machine provided with a computer form feeder.