JPH11308402A - Image forming device - Google Patents

Abstract

(57) Abstract: The present invention provides an automatic double-sided printing device (ADU) 70 in the case of a jam in which the printing order is changed after the jam is released according to the position where the jam has occurred. The paper stored in the storage unit 71 can be removed, and the output of a print result in a different printing order can be prevented. According to the present invention, when a jam occurs at the time of double-sided copying, when the position where the jam has occurred is from the feeding of the copy paper to the ADU 70, the copy paper in the storage unit 71 is not ejected. When the two-sided copy process is restarted and the jam occurs from the ADU 70 to the discharge port 71, the copy sheet stored in the storage unit 71 in the ADU 70 is automatically discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus having an automatic double-sided device for inverting a sheet on which an image is formed on the front side and forming an image on the back side.

[0002]

2. Description of the Related Art Conventionally, when performing double-sided printing, an image forming apparatus reverses and stores a sheet on which one side has been printed by a double-sided printing apparatus (ADU), and then performs printing on the other side. ing.

In such an ADU, when a sheet left in the ADU due to a transport abnormality in the apparatus is ejected, the user presses a specific key in accordance with a guide displayed on an operation panel to eject the sheet. I was For example, in an analog copying machine having a double-sided printing function and an automatic ejection mechanism, when a plurality of sheets printed on only one side are left printed in a storage unit (storage unit) in the ADU, In some cases, a stored sheet is automatically ejected by pressing a specific key in accordance with the contents guided on the operation panel. In other cases, the stored paper is removed by directly opening the front cover of the ADU.

The ADU is also a first-in, first-out (FI) which discharges the previously stored (stacked) sheets shown in FIG.
LO) and a first-in, first-out (FIFO) method in which the sheets are ejected in the order in which they are stored first as shown in FIG.

In the first-in last-out ADU, FIG.
As shown in (2), when a two-page document is printed on both sides, when the sheets printed on one side are stored in the storage unit in the ADU, the odd-numbered pages are sequentially printed on the one side from the first document (the first page). Is printed and stored in the storage unit in the ADU, and finally, the last odd-numbered page document is printed and the storage is completed.
Next, when printing on the back side, the last printed sheet stored in the storage unit is printed on the back side in order from the last even-page document, and finally the first A page is printed.
The first even page (the second page) is printed on one side of the sheet on which the first page of the original stored in the DU is printed, and is ejected.

For this reason, in the ADU of the first-in, first-out method, when a jam (paper jam) occurs, the paper on which the jam has occurred is reprinted, so that the printing order is not changed. On the other hand, it can be discharged after performing double-sided printing. Therefore, when a paper jam occurs, it is not necessary to remove all the sheets stacked in the storage unit of the ADU.

On the other hand, in a first-in first-out ADU, as shown in FIG. 9, when a plurality of pages of a document are printed on both sides, when a sheet printed on one side is stored in a storage unit in the ADU, an odd number is read from the first document. The page originals are sequentially printed on one side and stored in the storage unit in the ADU, and finally the last odd page original is printed and stored. Next, when printing the back side, the first even page (second page) of the document is sequentially printed from the sheet printed first and stored in the storage unit in the ADU, and finally the last page in the ADU. The last even-numbered document is printed on the paper stored in the printer and discharged.

However, first in first out (FIFO)
In the ADU of the system, when a paper jam occurs during double-sided printing, a problem occurs in which the order of printing is changed unless all papers in the apparatus are removed. Also, A
Regarding the paper remaining in the DU, unlike the paper jam such as around the fixing device, the fact that the paper is stored in the storage unit itself is not abnormal, and the paper is left inside the machine. There is a risk.

[0009]

As described above, the present invention provides a method for resuming printing without discharging sheets stored in a storage unit when a conveyance error occurs during double-sided printing. This solves the problem that the printing result is output in a different printing order.When a conveyance error occurs during duplex printing, the image forming medium stored in the storage unit can be discharged. It is an object of the present invention to provide an image forming apparatus which does not output a print result in which the order of printing is changed.

[0010]

An image forming apparatus according to the present invention, which forms an image on a medium on which an image is to be formed, includes means for instructing image formation on both sides of the medium on which the image is formed, and one side of a plurality of originals. Reading means for sequentially reading images on a page basis or images on both sides of a plurality of originals one page at a time, storage means for storing page-by-page images read by the reading means, and housed in a paper feeding unit. Supply means for supplying the image forming medium, image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and an image formed by the image forming means. Discharging means for discharging the forming medium,
After the image forming medium on which the image is formed by the image forming means is turned upside down and temporarily stored in the storage section, the reversing supply means is supplied again to the image forming means, and both sides of the image forming medium are controlled by the indicating means. When the image formation is instructed, the image of the odd-numbered pages stored in the storage means is sequentially read, and the read image is sequentially read from the first surface of the image forming medium sequentially supplied by the supply means. A first processing means for forming an image on the storage section and supplying the image to the reversing supply means and storing the image in the storage section; and when the processing for the odd-numbered page image stored in the storage means is completed by the first processing means. The image of the even-numbered page stored in the storage means is sequentially read out, and the read-out image is formed on the second surface of the image forming medium sequentially taken out of the storage section, A second processing means for discharging the image forming medium, a detecting means for detecting an abnormality in the conveyance of the image forming medium during the processing by the second processing means, and a detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the second processing means. The image processing apparatus includes a third processing unit that sequentially removes the image forming medium from the storage unit and discharges the discharged medium by the discharging unit when a conveyance abnormality of the image forming medium is detected.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, an instructing means for instructing image formation on both sides of the image forming medium; Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one, page by page; storage means for storing page-by-page images read by the reading means; image forming medium accommodated in a paper feed unit Supply means for supplying the image forming means, an image forming means for forming the read image read by the reading means on the image forming medium supplied by the supply means, and discharging for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, images of odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section, the first processing means storing the image in the storage means; When the processing on the odd-numbered page image is completed, the even-numbered page image stored in the storage means is sequentially read out, and the read-out image is sequentially read out from the storage section by the second image forming medium. A second processing means for forming an image on the surface of the medium and discharging the image by the discharging means, a detecting means for detecting an abnormal conveyance of the image forming medium during the processing by the second processing means, and a detecting means After release of the detected transport failure, and a third processing means for discharging by sequentially taken out the discharge means above an image forming medium from the housing section.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, an instructing means for instructing image formation on both sides of the image forming medium, and an image on one side of a plurality of originals in page units. Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section; When the processing for the odd-numbered page image is completed, the even-numbered page images stored in the storage means are sequentially read, and the read images are sequentially taken out of the storage section in the order stored in the storage section. Forming an image on the second surface of the image forming medium to be discharged, and discharging the image by the discharging means.
Detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the second processing means, and after removing the conveyance abnormality detected by the detection means, It comprises a third processing means for sequentially taking out the forming medium and discharging the medium by the discharging means.

According to another aspect of the present invention, there is provided an image forming apparatus for forming an image on an image forming medium, an instructing unit for instructing image formation on both sides of the image forming medium, and an image on one side of a plurality of documents in page units. Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section; When the processing for the odd-numbered page image is completed, the even-numbered page images stored in the storage means are sequentially read, and the read images are sequentially taken out of the storage section in the order stored in the storage section. Forming an image on the second surface of the image forming medium to be discharged, and discharging the image by the discharging means.
Processing means, a first detection means for detecting a conveyance abnormality of the image forming medium during the processing by the first processing means,
During the processing by the second processing means, a second detecting means for detecting the conveyance abnormality of the image forming medium, and when the conveyance abnormality is detected by the first detection means, after the conveyance abnormality is released, the conveyance is performed. Restart means for restarting the processing performed by the first processing means when an abnormality is detected; and
When the conveyance abnormality is detected by the detection means, the image formation medium is sequentially taken out from the storage section after the conveyance abnormality is released, and is discharged by the discharge means.

According to another aspect of the present invention, there is provided an image forming apparatus for forming an image on a medium on which an image is to be formed. Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section, the first processing means storing the image in the storage means; When the processing on the odd-numbered page images is completed, the even-numbered page images stored in the storage means are sequentially read out, and the read-out images are sequentially read out from the storage section by the second image forming medium. A second processing means for forming an image on the surface of the medium and discharging the same by the discharging means, a detecting means for detecting an abnormal conveyance of the image forming medium during the processing by the second processing means, and a detecting means for detecting the abnormal condition. A timer means for measuring the time from when the transport abnormality was released, and a timer for counting the time from the release of the transport abnormality, and when the time measured by the timer means has reached a predetermined time, the storage unit is removed from the storage unit. It comprises a third processing means for sequentially taking out the image forming medium and discharging it by the discharging means.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, instructing means for instructing image formation on both sides of the image forming medium; Reading means for sequentially reading or reading images on both sides of a plurality of originals one by one, page by page; storage means for storing page-by-page images read by the reading means; Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then re-supplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section; When the processing for the odd-numbered page image is completed, the even-numbered page images stored in the storage means are sequentially read, and the read images are sequentially taken out of the storage section in the order stored in the storage section. Forming an image on the second surface of the image forming medium to be discharged, and discharging the image by the discharging means.
Processing means, detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the second processing means, and when the conveyance abnormality detected by the detection means is released, the conveyance abnormality is released. A third means for sequentially taking out the image forming medium from the storage section and discharging the medium by the discharging means when the time counted by the time measuring means reaches a predetermined time; It is composed of processing means.

An image forming apparatus according to the present invention, which forms an image on a medium on which an image is to be formed, includes an instruction means for instructing image formation on both sides of the medium on which the image is to be formed. Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image forming means, an image forming means for forming the read image read by the reading means on the image forming medium supplied by the supply means, and discharging for discharging the image forming medium formed by the image forming means Means for reversing the image forming medium on which an image has been formed by the image forming means, and temporarily storing the medium in the storage section, and then supplying the image forming means again to the image forming means. Means for sequentially reading the images of the odd-numbered pages stored in the storage means when the image formation on both sides of the image forming medium is instructed by the instruction means, and reading the read image by the supply means. First processing means for forming an image on a first surface of a sequentially supplied image forming medium, supplying the image to the reversing supply means, and storing the image in the storage section, and storing in the storage means by the first processing means When the processing for the odd-numbered page images is completed, the even-numbered page images stored in the storage unit are sequentially read out, and the read out images are stored in the storage unit in the order stored in the storage unit. An image is formed on the second surface of the image forming medium which is sequentially taken out, and the second processing means for discharging by the discharging means. During the processing by the first processing means, the conveyance abnormality of the image forming medium is detected. Detect First detecting means, during the processing by the second processing means, second detecting means for detecting the abnormal conveyance of the an image forming medium, the first
When the conveyance abnormality is detected by the detection means of the above, after the conveyance abnormality is released, the conveyance means resumes the processing performed by the first processing means when the conveyance abnormality is detected, and the conveyance abnormality is detected by the second detection means. When detected, when the transport abnormality is released, when the transport abnormality is released, a timer means for measuring a time from when the transport abnormality is released, and when the time counted by the timer means reaches a predetermined time, the storage is performed. A third unit for sequentially taking out the image forming medium from the unit and discharging the medium by the discharging unit;
Processing means.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, an instructing means for instructing image formation on both sides of the image forming medium; Reading means for sequentially reading or reading images on both sides of a plurality of originals one by one, page by page; storage means for storing page-by-page images read by the reading means; Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section, the first processing means storing the image in the storage means; When the processing on the odd-numbered page images is completed, the even-numbered page images stored in the storage means are sequentially read out, and the read-out images are sequentially read out from the storage section by the second image forming medium. A second processing means for forming an image on the surface of the medium and discharging the same by the discharging means, a detecting means for detecting an abnormal conveyance of the image forming medium during the processing by the second processing means, and a detecting means for detecting the abnormal condition. Means for selecting whether or not to discharge the image forming medium stored in the storage unit after the release of the transport error, and when the discharging of the image forming medium is selected by the selecting means. And a third processing means for sequentially taking out the image forming medium from the storage section and discharging the medium by the discharging means.

An image forming apparatus according to the present invention, which forms an image on a medium on which an image is to be formed, includes means for instructing image formation on both sides of the medium on which the image is to be formed; Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image forming means, an image forming means for forming the read image read by the reading means on the image forming medium supplied by the supply means, and discharging for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section; When the processing for the odd-numbered page image is completed, the even-numbered page images stored in the storage means are sequentially read, and the read images are sequentially taken out of the storage section in the order stored in the storage section. Forming an image on the second surface of the image forming medium to be discharged, and discharging the image by the discharging means.
Processing means, a detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the second processing means, and after the conveyance abnormality detected by the detection means is released, the medium is stored in the storage section. Selecting means for selecting whether or not to discharge the image forming medium, and when the discharging of the image forming medium is selected by the selecting means, sequentially taking out the image forming medium from the storage section and discharging the image forming medium And a third processing means for discharging by means.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, an instructing means for instructing image formation on both sides of the image forming medium, and an image on one side of a plurality of originals in page units. Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, the images of the odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section; When the processing for the odd-numbered page image is completed, the even-numbered page images stored in the storage means are sequentially read, and the read images are sequentially taken out of the storage section in the order stored in the storage section. Forming an image on the second surface of the image forming medium to be discharged, and discharging the image by the discharging means.
Processing means, a first detection means for detecting a conveyance abnormality of the image forming medium during the processing by the first processing means,
During the processing by the second processing means, the second detecting means for detecting the conveyance abnormality of the image forming medium and the conveyance error after the conveyance abnormality is detected by the first detection means when the conveyance abnormality is detected. Means for resuming the processing performed by the first processing means at the time of detection of the image to be stored in the storage section when the conveyance abnormality is detected by the second detection means when the conveyance abnormality is detected. Selecting means for selecting whether or not to discharge the forming medium, and when the discharging of the image forming medium is selected by the selecting means, the image forming medium is sequentially taken out from the storage section and is discharged by the discharging means. It comprises a third processing means for discharging.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium; Reading means for sequentially reading or reading images on both sides of a plurality of documents one by one on a page basis; storage means for storing page-by-page images read by the reading means; and an image forming medium stored in a paper feed unit Supply means for supplying the image, an image forming means for forming a read image read by the reading means on the image forming medium supplied by the supply means, and a discharge for discharging the image forming medium formed by the image forming means Means for inverting the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then resupplying the image forming means When an image formation on both sides of the image forming medium is instructed by the instruction means, images of odd pages stored in the storage means are sequentially read, and the read images are sequentially supplied by the supply means. A first processing means for forming an image on a first surface of the image forming medium to be supplied, supplying the image to the reversing supply means, and storing the image in the storage section, the first processing means storing the image in the storage means; When the processing on the odd-numbered page image is completed, the even-numbered page image stored in the storage means is sequentially read out, and the read-out image is sequentially read out from the storage section by the second image forming medium. A second processing means for forming an image on the surface of the medium and discharging the image by the discharging means, a detecting means for detecting an abnormal conveyance of the image forming medium during the processing by the second processing means, and a detecting means After the detected conveyance abnormality is released, the image forming medium is sequentially taken out from the storage section, and an image indicating that the sheet is ejected due to the conveyance abnormality is formed by the image forming means, and the image is discharged. And a third processing means for discharging by means.

An image forming apparatus according to the present invention, in which an image is formed on an image forming medium, receives a recording medium on which usage information is recorded, and permits the use of image formation based on the recorded contents of the recording medium. Permission means, instructing means for instructing image formation on both sides of the image forming medium, reading for sequentially reading images on one side of a plurality of documents in page units, and reading images on both sides of a plurality of documents for each side in page units Means, storage means for storing an image in page units read by the reading means, supply means for supplying an image forming medium stored in a paper feeding section, and supply of the read image read by the reading means by the supply means Forming means for forming an image on a medium to be formed, a counting means for counting the number of times of image formation performed by the image forming means, and an image forming means for forming an image by the image forming means. Discharging means for discharging an image forming medium which is, after temporarily stored in the storage unit inverts the front and back of an image forming medium on which an image is formed by the image forming means,
Reversal supply means for re-supplying the image forming means, when image forming on both sides of the image forming medium is instructed by the instruction means, sequentially reads the odd-numbered page images stored in the storage means, The read image is supplied to the first of the image forming media sequentially supplied by the supply unit.
A first processing means for forming an image on the surface of the image, supplying the image to the reversing supply means, and storing the image in the storage section; and the processing of the odd-numbered page image stored in the storage means by the first processing means is completed. In this case, the images of the even pages stored in the storage means are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section, and the images are discharged. Means for discharging the medium to be image-formed during the processing by the second processing means, detecting means for detecting an abnormality in the conveyance of the image forming medium, and removing the abnormal conveyance detected by the detecting means. A third processing unit for sequentially taking out the image forming medium from the unit and discharging the paper by the discharging unit; and a third processing unit for discharging the paper by the third processing unit based on the number of image formations counted by the counting unit. And a fourth processing means not to perform addition processing of the image formation count.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the internal structure of a digital copying machine as an example of the image forming apparatus of the present invention.

As shown in FIG. 1, the digital copying machine includes an apparatus main body 10, in which a scanner section 4 and a printer section 6 functioning as reading means described later are provided.

Also, this device has an optional
A function is provided for permitting the use of a copy based on the recorded contents of a memory card (recording medium) such as a magnetic card or an IC card in which usage information such as the frequency of use is recorded.

On the upper surface of the main body 10 of the digital copying machine, there is provided an original mounting table 12 made of transparent glass on which an object to be read, that is, an original D, is mounted. An automatic document feeder 7 (hereinafter, referred to as an ADF) for automatically feeding the document D onto the document table 12 is provided on the upper surface of the apparatus main body 10. The ADF 7 includes the document table 1
The document D is placed so as to be openable and closable with respect to the document loading table 2, and also functions as a document holder for bringing the document D placed on the document loading table 12 into close contact with the document loading table 12.

The ADF 7 includes a document tray 8 on which a document D is set, an empty sensor 9 for detecting the presence or absence of the document D,
A pickup roller 14 for taking out the originals D one by one from the original tray 8, a feed roller 15 for transporting the originals D taken out, a pair of aligning rollers 16 for aligning the leading end of the original D, and almost the entire original placing table 12 A transport belt 18 is provided so as to be covered. Then, the document tray 8
A plurality of originals D set upward are sequentially taken out from the bottom page, that is, the last page, are aligned by the aligning roller pair 16, and are then positioned on the original mounting table 12 by the transport belt 18. Conveyed to the position.

In the ADF 7, a reversing roller 20, a non-reversing sensor 21, a flapper 22, and a paper discharging roller 23 are disposed at an end opposite to the aligning roller pair 16 with the transport belt 18 interposed therebetween. The document D whose image information has been read by the scanner unit 4 described later is sent out from the document table 12 by the transport belt 18,
The ADF 7 via the flapper 21 and the paper discharge roller 22
The document is discharged onto the document discharge unit 24 on the upper surface. When reading the back side of the original D, the original D transported by the transport belt 18 is inverted by the reversing roller 20 by switching the flapper 22, and is again moved to a predetermined position on the original placing table 12 by the transport belt 18. Sent.

The scanner unit 4 provided in the apparatus main body 10
Has an exposure lamp 25 as a light source for illuminating the document D placed on the document table 12, and a first mirror 26 for deflecting the reflected light from the document D in a predetermined direction. The first mirror 25 and the first mirror 26 are attached to a first carriage 27 disposed below the document table 12.

The first carriage 27 is mounted on the document table 12.
And is reciprocally moved below the document table 12 by a drive motor 38 via a toothed belt or the like (not shown).

A second carriage 28 that can move in parallel with the document placing table 12 is provided below the document placing table 12. On the second carriage 28, second and third mirrors 30, 31 for sequentially deflecting the reflected light from the document D deflected by the first mirror 26 are attached at right angles to each other. The second carriage 28 is connected to the first carriage 27 by a toothed belt or the like that drives the first carriage 27.
Of the original mounting table 1 at half speed with respect to the first carriage 27.
2 are moved in parallel.

An image forming lens 32 for converging the reflected light from the third mirror 31 on the second carriage 28 and a reflected light condensed by the image forming lens 32 are provided below the document table 12. A CCD sensor 34 that receives light and performs photoelectric conversion is provided. The imaging lens 32 includes the third mirror 3
The light deflected by 1 is movably disposed in a plane including the optical axis of the light via a moving mechanism, and moves to form an image of the reflected light at a desired magnification. Then, the CCD sensor 34
Converts the incident reflected light into a photoelectric signal and outputs an electric signal corresponding to the read original D.

On the other hand, the printer section 6 includes a laser exposure device 40 which functions as an exposure scanning device. The laser exposure device 40 drives a semiconductor laser 41 as a light source, a polygon mirror 36 as a scanning member that continuously deflects laser light emitted from the semiconductor laser 41, and rotationally drives the polygon mirror 36 at a predetermined rotation speed. A polygon motor 37 as a scanning motor and a laser optical system 42 for deflecting the laser light from the polygon mirror 36 and guiding the laser light to a photosensitive drum 44 described later are provided. The laser exposure apparatus 40 having such a configuration is fixedly supported by a support frame (not shown) of the apparatus main body 10.

The semiconductor laser 41 is controlled to be turned on / off in accordance with image information of the document D read by the scanner unit 4, and laser light is transmitted through the polygon mirror 36 and the laser optical system 42 in the laser exposure device 40. The electrostatic latent image is formed on the peripheral surface of the photosensitive drum 44 by scanning the peripheral surface of the photosensitive drum 44.

The printer section 6 has a rotatable photosensitive drum 44 as an image carrier disposed substantially at the center of the apparatus main body 10, and the peripheral surface of the photosensitive drum 44 extends in the sub-scanning direction. While being rotated by the main motor 77 as a moving means, the exposure is performed by the laser light from the laser exposure device 40 to form a desired electrostatic latent image. Photoconductor drum 4
Around the photosensitive drum 44, a charging charger 45 for charging the peripheral surface of the photosensitive drum 44 to a predetermined potential before an image is formed, and an electrostatic latent image formed on the photosensitive drum 44 peripheral surface as a developer A developing device 46 as a developing unit that supplies toner to develop the image at a desired image density, a transfer material (image forming medium) fed from a paper cassette described later, that is, a copy sheet P is transferred from the photosensitive drum 44 A transfer charger 4 integrally having a separation charger 47 for separating the toner image and transferring the toner image formed on the photosensitive drum 44 to the sheet P;
8, a peeling claw 49 for peeling the copy sheet P from the peripheral surface of the photosensitive drum 44, a cleaning device 50 for cleaning the toner remaining on the peripheral surface of the photosensitive drum 44, and a static eliminator for removing the static electricity of the peripheral surface of the photosensitive drum 51 are arranged in order. The photosensitive drum 44, a developing roller (not shown) in the developing unit 46, and the like are driven to rotate by a main motor 77.

An upper cassette 52, a middle cassette 53, and a lower cassette 54, which can be pulled out from the apparatus main body, are arranged in a lower part in the apparatus main body 10, respectively.
Copy papers P of different sizes are loaded in each cassette. A large-capacity feeder 55 is provided beside these cassettes, and the large-capacity feeder 55 stores about 3000 copy sheets P of a frequently used size, for example, A4 size copy sheets P. . Above the large-capacity feeder 55, a paper feed cassette 57 also serving as a manual feed tray 56 is detachably mounted.

In the apparatus main body 10, a transport path 5 extending from each cassette and the large-capacity feeder 55 through a transfer portion located between the photosensitive drum 44 and the transfer charger 48 is provided.
8 are formed, and a fixing lamp 60a is provided at the end of the conveyance path 58.
Further, a fixing device 60 having a heat roller 60b heated by the fixing lamp 60a is provided.
A discharge port 61 is formed on a side wall of the apparatus main body 10 facing the fixing device 60, and a single tray finisher 150 is attached to the discharge port 61.

In the vicinity of the upper cassette 52, the middle cassette 53, the lower cassette 54, the paper cassette 57 and the large capacity feeder 55, there are provided pickup rollers 63 for taking out the sheets P one by one from the cassette or the large capacity feeder. Have been. The transport path 58 is provided with a number of paper feed roller pairs 64 for transporting the copy sheet P taken out by the pickup roller 63 through the transport path 58.

A registration roller pair 65 is provided on the transport path 58 upstream of the photosensitive drum 44. The registration roller pair 65 corrects the inclination of the copy paper P taken out, aligns the leading end of the toner image on the photosensitive drum 44 with the leading end of the copy paper P, and adjusts the moving speed of the peripheral surface of the photosensitive drum 44 to The copy paper P is fed to the transfer unit at the same speed. A pre-alignment sensor 66 for detecting the arrival of the copy sheet P is provided in front of the registration roller pair 65, that is, on the side of the feed roller 64.

The copy paper P taken out one by one from each cassette or the large-capacity feeder 55 by the pickup roller 63 is sent to the registration roller pair 65 by the paper supply roller pair 64. Then, the copy paper P is sent to the transfer section after the leading end is aligned by the registration roller pair 65.

In the transfer section, the developer image formed on the photosensitive drum 44, that is, the toner image, is transferred onto the sheet P by a transfer charger 48 as a transfer unit.
The copy paper P on which the toner image has been transferred is peeled off from the peripheral surface of the photosensitive drum 44 by the action of the peeling charger 47 and the peeling claw 49, and is transferred to the fixing device 60 via the transport belt 67 constituting a part of the transport path 52. Conveyed. After the developer image is fused and fixed to the copy paper P by the fixing device 60, the copy paper P is passed through the discharge port 61 by the paper feed roller pair 68 and the paper discharge roller pair 69 to the finisher 1.
It is discharged above 50. In the vicinity of the discharge roller pair 69, a discharge detection sensor 62 for detecting discharge of the copy sheet P is provided.

Under the conveyance path 58, the copy sheet P that has passed through the fixing device 60 is turned over,
An automatic double-sided unit (ADU) 70 for feeding to the ADF 5 is provided. The ADU 70 includes a temporary stacking unit 71 that temporarily stacks the copy sheets P, and a branch from the transport path 58 to the fixing device 60.
A reversing path 72 for inverting the copy paper P passing through the paper stack and guiding the copy paper P to the temporary stacking unit 71, and a copy paper P stacked in the temporary stacking unit.
Roller 73 for taking out the sheet P one by one, and register roller pair 6
And a sheet feeding roller 75 for feeding the sheet to the sheet feeding device 5. Further, at a branch portion between the transport path 58 and the reversing path 72, a distribution gate 76 for selectively distributing the copy sheet P to the discharge port 61 or the reversing path 72 is provided.

When performing double-sided copying, the copy sheet P on which a single-sided image has been formed and has passed through the fixing device 60 is guided to the reversing path 72 by the sorting gate 76 and conveyed to the ADU 70.

In the ADU 70, the copy sheets P guided to the reversing path 72 are sequentially stacked and stored in the storage section 71,
The copy paper P stored in the temporary storage unit 71 is stored in the order in which it is stored, that is, the copy paper P is taken out from the bottom sheet of the paper stacked in the storage unit 71 by the take-out roller 73, The sheet is sent to a pair of registration rollers 65 through 75. Then, after the copy paper P is aligned by the registration roller pair 65, the copy paper P is sent to the transfer unit again, and the toner image is transferred to the back surface of the copy paper P. Thereafter, the copy sheet P is discharged to the finisher 150 via the transport path 58, the fixing device 60, and the discharge roller 69.

The finisher 150 is for stapling and storing the discharged documents of a partial configuration in a unit. Each time the copy sheet P to be stapled is discharged from the sheet discharge port 61, the copy sheet P is brought closer to the side to be stapled by the guide bar 151 and aligned. When all the sheets have been ejected, the paper holding arm 152 suppresses the part of the ejected copy sheet P, and a stapler unit (not shown) performs stapling. Thereafter, the guide bar 151 is lowered, and the stapled copy paper P is discharged to the finisher discharge tray 154 by the finisher discharge roller 155 in a unit. Finisher discharge tray 154
The amount of decrease is determined to some extent by the number of copy sheets P to be discharged, and decreases step by step every time a part of the copy paper P is discharged. Further, the guide bar 151 for aligning the copy sheet P to be discharged is located at such a height that it does not hit the already stapled copy sheet P placed on the finisher discharge tray 154.

Further, the finisher discharge tray 154 is
In the sort mode, it is connected to a shift mechanism (not shown) that shifts every part (for example, in four directions of front, rear, left and right).

A memory card (recording medium) such as a magnetic card or an IC card is inserted from the insertion portion 131a into the lower right side of the operation panel 80 on the front surface of the apparatus main body. Card reader / writer 131 for recording the information of
A user counter 132 for counting the number of copies made by each user is provided near the card reader / writer.

Further, there is provided a total counter 133 for counting the number of times image formation has been performed by a count switch 133a provided on the conveyance path at the subsequent stage of the fixing device.

The user counter 132 is reset when the memory card is inserted into the card reader / writer 131, and counts the number of copies made using the memory card. Based on this count value, The number of uses is determined.

The total counter 133 counts the number of sheets on which images have been formed, that is, the number of image formations, and counts the number of image formations performed by this apparatus.

In the upper portion of the front surface of the apparatus main body 10, various copying conditions such as designation of the number of prints and magnification, input of partial copying and input of friction in the area, and a copy start signal for starting a copying operation are input. A panel 80 is provided.

As shown in FIG. 2, the operation panel 80 includes a numeric keypad 81, a copy key 82, a status display section 83, a liquid crystal display section 84, an original size setting key 85, a paper size setting key 86, a density display section 87, and a density. It comprises a setting key 88 and a magnification setting key 89.

The ten keys 81 are used to input various set values and to set the number of originals and the number of copies. The copy key 82 is for instructing the start of copying.

The status display section 83 is for guiding and displaying the selection state of the paper feed cassette, the position of a paper jam (jam) of the document D and the paper P, and the like. The liquid crystal display 84 displays the number of originals and the number of copies, displays a copy magnification, edits, and provides various operation guidance. The liquid crystal display unit 84 is provided with a touch panel, and can input various operation instructions such as input of the selection key.

The document size setting key 85 is for setting the size of the document D. The paper size setting key 86 is
This is for setting the size of the paper P. Density display section 87
Indicates the copy density set by the density setting key 88.

The magnification setting key 89 is used to set the magnification from 50% to 400% in increments of 1%. FIG.
FIG. 1 is a block diagram schematically showing a signal flow for electrical connection and control of the digital copying machine in FIG.

According to FIG. 3, in the digital copying machine,
The printer CPU of the printer unit 6 including the main CPU 91 in the main control unit 90 and the scanner CPU 100 of the scanner unit 4
It comprises 110 CPUs. Main CPU 91
Performs bidirectional communication with the printer CPU 110 via the shared RAM 95. The main CPU 91 issues an operation instruction, and the printer CPU 100 returns a status. The printer CPU 110 and the scanner CPU 100 perform serial communication, and
10 issues an operation instruction, and the scanner CPU 100 returns a status status.

The operation panel 80 is connected to the main CPU 91. The main control unit 90 includes a main CPU 91, R
OM92, RAM93, NVM94, shared RAM95,
Image processing unit 96, page memory control unit 97, page memory 98, open / close detector 99, card reader / writer 13
1 and a user counter.

The main CPU 91 controls the entire main control section 90. The ROM 92 stores a control program and the number of drive steps for the scanner motor 37 at the time of reading and scanning for each document size. RA
M93 is for temporarily storing data.

NVM (lasting random access memory: n)
The on-volatile RAM 94 is a non-volatile memory backed up by a battery (not shown), and retains data on the NVM 94 when the power is turned off.

The shared RAM 95 is used for performing bidirectional communication between the main CPU 91 and the printer CPU 110. The image processing unit 96 performs trimming, masking, enlargement and reduction of an image, and the like.

The page memory control section 97 stores and reads out image data in the page memory 98. The page memory 98 has an area in which image data for a plurality of pages can be stored, and is formed so that data obtained by compressing image data from the scanner unit 4 can be stored for each page.

The open / close detecting section 99 detects the open / close of a front cover and a side cover which can be opened / closed provided on the front and side surfaces of the apparatus main body by a detection switch (not shown) or the like.

The scanner unit 4 includes a scanner CPU 100 for controlling the entire scanner unit 4, a ROM 101 storing a control program and the like, and a RAM 10 for storing data.
2. CCD driver 10 for driving CCD sensor 34
3. A scanner motor driver 1 for controlling the rotation of a scanner motor 37 for moving the exposure lamp 25 and the first and second carriages 27, 28 of the mirrors 26, 30, 31 and the like.
A / D conversion circuit for converting an analog signal from the CCD sensor 34 into a digital signal and the CCD sensor 3
4 due to variations in temperature or changes in ambient temperature
The image correction device 105 includes a shading correction circuit for correcting a threshold level fluctuation with respect to an output signal from the CD sensor 34, and a line memory for temporarily storing a digital signal subjected to shading correction from the shading correction circuit.

The printer section 6 includes a printer CPU 110 for controlling the entire printer section 6, a ROM 111 for storing control programs and the like, and a RAM 11 for data storage.
2. Laser driver 113 for turning on / off light emission by semiconductor laser 41, polygon motor driver 11 for controlling rotation of polygon motor 39 of laser unit 40
4. paper transport unit 115 for controlling transport of paper P by transport path 58, charging device 45, developing device 46, transfer charger 4
Developing process unit 11 for performing charging, developing, and transferring using 8
6, a fixing control unit 117 for controlling the fixing unit 60, an option unit 118, a conveyance detection unit 119 including a plurality of detectors for detecting a conveyance state on each conveyance path in the apparatus, and a total counter 133.

The transport detecting section 119 is a detector 1 for detecting a jam that occurs when paper is fed from each paper cassette.
19a, a detector 119b that detects a jam that occurs before the paper is guided from the paper feed roller 64 to the transfer unit, and the fixing device 60
Detector 119c for detecting a jam occurring in the periphery, from the sorting gate 76 in front of the discharge port 61 to the storage unit 7 of the ADU 70
Detector 119 that detects a jam that occurs before leading to 1
d, a detector 119e that detects a jam that occurs before the sheet is supplied from the storage unit 71 in the ADU 70 to a position before the registration roller pair 65, and a detector 119f that detects a jam that occurs when the sheet is discharged by the discharge roller pair 69. Consists of

The image processing section 96 and the page memory 9
8. The image correction device 105 and the laser driver 113 are connected by an image data bus 120. In the above-described configuration, as one example of a double-sided copy, an operation of placing a single-sided original D of 1 to 20 pages on the ADF 7 and sequentially performing the double-sided copy of the original D will be described.

That is, when the user has 20 single-sided originals D
Is copied on both sides of copy paper P, the user
A plurality of originals D are stacked on the ADF 7 in page order, a double-sided copy mode is selected by the operation panel 80, and a copy start instruction is issued. Then, the main CPU 91 executes the ADF
7 is read, and the read image is stored in the page memory in the page order of the document D. The main CPU 91 outputs the copy paper P of the size of the original D or the size specified by the user.
Are fed one by one from the cassette in which the sheets are stored, and the odd pages of the document stored in the page memory 98 are sequentially printed from one page on the front side of the copy sheet P, and stored in the storage unit in the ADU 70. Stack (store) at 71.

Then, after printing all the odd pages of the document D and stacking them in the storage unit 71 of the ADU 70, the storage unit 7
Then, the copy sheets P stacked in No. 1 are sequentially taken out, and the even-numbered pages stored in the page memory 98 are sequentially printed from the second page and discharged from the discharge port 61. As a result, on the discharge tray 154, page 1, page 3, page 5,.
With respect to copy paper P having 19 pages printed on the front side, pages 2, 4, 6,..., And 20 of the original D are printed on the back side and discharged in order.

Next, a process performed when a jam occurs during double-sided copying will be described with reference to a flowchart shown in FIG. When the main CPU 91 determines that a jam has occurred by the conveyance detection unit 119 that detects the conveyance state of the copy sheet P on each conveyance path in the apparatus (step 1), the liquid crystal display unit 84 of the operation panel 80 indicates that a jam has occurred. The guidance display is performed (step 2), and the position where the jam has occurred is displayed on the status display unit 83.

According to the guidance on the guidance display, the user:
Open the front cover or side cover corresponding to the area where the jam has occurred. Then, the main CPU 91
Determines that the cover has been opened based on the detection result of the open / close detector 99 (step 3).

Then, the user takes out the copy sheet P having the jam left on the conveyance path, and then closes the cover again. Then, the main CPU 91 determines that the cover once opened is closed again based on the detection result of the open / close detection unit 99 (step 4).

When the main CPU 91 determines that the cover once opened is closed again by this determination, the main CPU 91 determines whether or not the jammed copy sheet P has been removed by the transport detection unit 119 (step 5). When it is determined that the jammed copy paper P has not been removed, the process returns to step 2 and the liquid crystal display unit 84 and the status display unit 83 again display an error accompanying the jam, and Wait for opening and closing.

When the main CPU 91 determines that the copy sheet P in which the jam has occurred has been removed, that is, when it is determined that the jam has been released, the position where the jam occurred is indicated by AD.
It is determined whether the position is from U70 to the outlet 61 (step 7).

When it is determined in step 6 that the position where the jam has occurred is not the jam from the ADU 70 to the discharge port 61, after preparing for printing from the paper for which the jam has occurred (step 11), Restart the double-sided copy process.

When it is determined that the jam has occurred before the paper is discharged from the ADU 70 through the discharge port 61, it is determined whether or not the copy paper P is stacked in the storage unit 71 in the ADU 70 ( Step 8).

Based on this determination, the storage unit 71 in the ADU 70
When the main CPU 91 determines that the copy paper P is stacked on the printer, the main CPU 91 starts counting time using an internal timer (not shown) (step 9). And the main C
The PU 91 determines whether a predetermined time has elapsed based on the count value of the internal timer (step 10).

When it is determined that the predetermined time has elapsed from the count value of the internal timer, the main CPU 9
1 starts an automatic discharge process of the copy sheet P stored in the storage unit 71 of the ADU 70 (step 11).

Thus, when a jam occurs, the copy paper P stored in the storage unit 71 in the ADU 70 can be automatically discharged without any operation by the user.
Next, a process of discharging the copy sheet P stored in the storage unit 71 in the ADU 70 in accordance with an instruction from the operation panel 80 when a jam occurs during the duplex copying will be described.

That is, when the main CPU 91 determines that a jam has occurred (step 21), as in steps 1 to 7, the operation panel 80 informs the user of the occurrence of the jam (step 22). After the user clears the jam according to this guidance (steps 23-2)
5) The main CPU 91 determines that the jam that has occurred is ADU7.
It is determined whether or not the jam has occurred until the paper is discharged from the ADU 70 to the discharge outlet 61 (step 26). After preparation for printing from the minute printing (step 27), the duplex copying process is restarted.

When the main CPU 91 determines that a jam has occurred before the paper is discharged from the ADU 70 to the discharge port 61, the main CPU 91 determines whether or not the copy sheet P is stored in the storage unit 71 of the ADU 70 (step 28). ADU is determined by this judgment.
When it is determined that there is a copy sheet P in the storage unit 71 of
The main CPU 91 is connected to the liquid crystal display 84 of the operation panel 80.
In the storage unit 7 in the ADU 70 that "paper is in the ADU"
1 displays a message that the copy sheet P is left (step 29).

When the user automatically ejects the copy sheet P stored in the storage unit 71 of the ADU 70 according to the guidance, the user inputs an instruction to perform the automatic ejection. Main C
When the user inputs an instruction for automatic ejection, the PU 91 determines automatic ejection (step 30).

When the main CPU 91 determines that automatic ejection has been instructed, the storage unit 7 of the ADU 70
1 is discharged to the discharge port 61 (step 31).

Thus, after removing the jam, it is possible to select whether to discharge the copy sheet P remaining in the storage unit 71 of the ADU 70 based on the user's intention. Next, a process of performing printing indicating that the sheet is automatically ejected on the sheet to be automatically ejected will be described with reference to a flowchart shown in FIG.

That is, the main CPU 91 sets the ADU7
When it is determined that the copy paper P stored in the storage unit 71 of the “0” is automatically discharged (step 41), print data (image) such as a mark or a character string indicating that the paper is to be automatically discharged.
Is created (step 42).

At this time, as an example of printing to be performed, “×” is printed on a sheet of paper, a watermark is printed, and a character string “is automatically discharged by a paper jam” is printed.

When the automatically ejected copy sheet P is detected by the pre-alignment sensor 66, the main CPU
A step 91 executes a process of printing the print data created in the step 42 on the copy sheet P (step 43).
Then, the copy sheet P on which the print processing has been performed is discharged to the discharge port 61.
To be discharged.

When it is determined in step 41 that automatic ejection is not performed, that is, when normal printing is performed, a print image to be printed is read from the page memory 98 (step 44), and printing is performed (step 43). .

Thus, the operator can recognize that the ejected sheet is the automatically ejected sheet, and can easily distinguish it from the normally copied sheet. Next, the user counter 132 when automatic ejection is performed
The counting process of the total counter 133 will be described with reference to a flowchart shown in FIG.

That is, when the user executes copying,
Insert the memory card possessed by the card reader / writer 131. Then, information such as the remaining frequency recorded on the memory card is read by the card reader / writer 131. The read information such as the remaining frequency is displayed on the liquid crystal display unit 84, and the user is permitted to use the apparatus.

Then, the user selects the double-sided copy mode on the operation panel 80, places a plurality of originals D on the ADF 7, and instructs the start of copying. Then, the main CP
U91 determines the start of copying and starts double-sided copy processing.

When a jam occurs during the double-sided copy process, the above-described steps 1 to 11 or the steps 21 to 31 are performed.
It is determined whether or not to perform the automatic discharge process of the sheets stacked in No. 1. When the main CPU 91 determines that the automatic discharge process is to be performed, the main CPU 91 further proceeds to step 4 above.
It is determined whether or not to print the image indicating that the sheet is automatically ejected as described in steps 1 to 44 and eject the sheet (step 51).

When it is determined that printing is to be performed and discharged according to this determination, an image indicating that the paper is automatically discharged is printed on the paper to be discharged and discharged to the discharge port 61 in the same manner as in steps 42 and 43 described above. At this time, the total counter 1
33 is counted up (step 52), but the user counter 132 does not count up. In the case where the image indicating that the sheet is automatically ejected is automatically ejected without printing, the total counter 133 and the user counter 132 are not counted up.

Further, the main CPU 91 stops the count-up process of the user counter 132 for the number of times of printing on the automatically ejected paper, that is, the number of copies printed on the surface of the automatically ejected paper (step 5).
3).

When the user finishes the copy process, the main CPU 91 calculates the number of uses based on the count value of the user counter 132, and processes and returns the number of times of use from the memory card inserted by the user. I do.

For example, if the user sets 1 for 20 pages of the manuscript
When zero-sided double-sided copying is performed, after the copy paper P on which the front 10 sheets have been printed is stored in the storage unit 71 of the ADU 70, the first copy paper P is taken out of the storage unit 71. If a paper jam occurs during printing on the back side and automatic ejection is determined, the copy paper P stored in the storage unit 71 is automatically ejected. At this time, when printing indicating automatic discharge is performed on copy paper P to be automatically discharged, the total counter 133 counts up when discharging, but the user counter 132 does not count up. That is, in this case, the count-up process is stopped for the number of times of the printing process performed on the discharged sheet.

Thus, it is possible to prevent the user from being charged for the number of copies made on the paper automatically ejected due to the jam, and not to incur extra cost for the user.

As described above, when a jam occurs during double-sided copying and the position where the jam has occurred is from the feeding of the copy sheet to the ADU, the copy sheet in the storage unit is not discharged and the double-sided copy is performed. If the jam occurs from the ADU to the discharge port, the ADU
The copy paper stored in the storage section is automatically discharged.

Thus, in the case of a jam in which the print order is changed after the jam is released according to the position where the jam has occurred, the paper stored in the storage unit in the ADU can be removed. It is possible not to output a print result in a different print order.

[0099]

As described above, according to the present invention, the image forming medium stored in the storage unit can be discharged when a conveyance error occurs during duplex printing.
It is possible to provide an image forming apparatus that does not output a print result in a different printing order.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a digital copying machine for describing an embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of an operation panel.

FIG. 3 is a block diagram illustrating a schematic configuration of a digital copying machine.

FIG. 4 is a flowchart for explaining a process of performing automatic discharge by time monitoring.

FIG. 5 is a flowchart illustrating a process of performing automatic ejection based on an instruction from an operation panel.

FIG. 6 is a flowchart for explaining processing when printing is performed to indicate that the sheet is automatically ejected when automatic ejection is performed.

FIG. 7 is a flowchart for explaining processing of a total counter and a user counter when automatic ejection is performed.

FIG. 8 is a diagram for explaining an ADU of first-in first-out.

FIG. 9 is a view for explaining a first-in first-out (FIFO) ADU.

[Explanation of symbols]

 Reference Signs List 4 scanner section 6 printer section 80 operation panel 83 state display section 84 liquid crystal display section 91 main CPU 98 page memory 110 printer CPU 115 banknote transport path 119 transport detection section 131 card reader / writer 132: User counter

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04N 1/04 H04N 1/04 Z

Claims (12)

[Claims] 1. An image forming apparatus for forming an image on a medium on which an image is to be formed, an instruction means for instructing image formation on both sides of the medium on which the image is to be formed; Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. A second processing means for sequentially reading out the images, forming an image on the second surface of the image forming medium sequentially taken out from the storage section, and discharging the image by the discharging means; Detecting means for detecting an abnormal conveyance of the image forming medium during the processing by the processing means; and detecting the abnormal conveyance of the image forming medium during the processing by the second processing means by the detecting means. ,
A third processing unit for sequentially taking out the image forming medium from the storage unit and discharging the medium by the discharging unit. 2. An image forming apparatus for forming an image on an image forming medium, comprising: an instruction unit for instructing image formation on both sides of the image forming medium; Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. A second processing means for sequentially reading out the images, forming an image on the second surface of the image forming medium sequentially taken out from the storage section, and discharging the image by the discharging means; Detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the processing means; and removing the conveyance error detected by the detection means, and sequentially taking out the image forming medium from the storage section, and An image forming apparatus comprising: a third processing unit that discharges by a discharging unit. 3. An image forming apparatus for forming an image on a medium on which an image is to be formed, an instruction means for instructing image formation on both sides of the medium on which the image is to be formed; Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. Are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section in the order of storage in the storage section, and are discharged by the discharge means. (2) processing means, detection means for detecting the conveyance abnormality of the image forming medium during the processing by the second processing means, and, after the conveyance abnormality detected by the detection means is released, And a third processing unit for sequentially taking out the image forming medium and discharging the medium by the discharging unit. 4. An image forming apparatus for forming an image on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on the image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. Are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section in the order of storage in the storage section, and the read-out images are discharged by the discharge means. 2 processing means; 1st detection means for detecting an abnormal conveyance of the image forming medium during the processing by the 1st processing means; and A second detection unit for detecting a conveyance error of the medium, a first detection unit for detecting a conveyance error, a release of the conveyance error, and the detection of the conveyance error by the first processing unit. Resume to resume the process that was being performed And a third processing unit configured to sequentially remove the image forming medium from the storage unit and discharge the medium by the discharge unit when the transfer abnormality is detected by the second detection unit when the transfer abnormality is detected; An image forming apparatus comprising: 5. An image forming apparatus for forming an image on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a paper feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on the image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in a storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even page stored in the storage unit when processing of an odd page image stored in the storage unit is completed by the first processing unit. A second processing means for sequentially reading the images, forming an image on the second surface of the image forming medium sequentially taken out of the storage section, and discharging the image by the discharging means; Detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the processing means; and, when the conveyance abnormality detected by the detection means is released, measuring a time from when the conveyance abnormality is released. And a third processing unit for sequentially removing the image forming medium from the storage unit and discharging the medium by the discharging unit when the time counted by the clocking unit reaches a predetermined time. Octopus An image forming apparatus comprising. 6. An image forming apparatus for forming an image on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. Are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section in the order of storage in the storage section, and are discharged by the discharge means. (2) a detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the second processing means; and (c) detecting the conveyance abnormality when the conveyance abnormality detected by the detection means is released. A time-measuring means for measuring a time from the time of release, and, when the time measured by the time-measuring means reaches a predetermined time, sequentially take out the image forming medium from the storage section and discharge the medium by the discharging means. Third An image forming apparatus, comprising: 7. An image forming apparatus for forming an image on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. Are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section in the order of storage in the storage section, and are discharged by the discharge means. 2 processing means; 1st detection means for detecting an abnormal conveyance of the image forming medium during the processing by the 1st processing means; and A second detection unit for detecting a medium conveyance abnormality, and the first processing unit performs when the conveyance abnormality is detected by the first detection unit, after the conveyance abnormality is released, and when the conveyance abnormality is detected. Means for resuming processing When the conveyance abnormality is detected by the second detection means, when the conveyance abnormality is released, a time measurement means for measuring a time from when the conveyance abnormality is released, and a time measured by the time measurement means And a third processing unit for sequentially taking out the image forming medium from the storage unit and discharging the medium by the discharging unit when a predetermined time has elapsed. 8. An image forming apparatus for forming an image on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. A second processing means for sequentially reading out the images, forming an image on the second surface of the image forming medium sequentially taken out from the storage section, and discharging the image by the discharging means; A detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the processing means, and discharging the image forming medium stored in the storage section after the conveyance abnormality detected by the detecting means is released. Selecting means for selecting whether or not to perform, and when the discharging of the image forming medium is selected by the selecting means, the image forming medium is sequentially taken out from the storage section and discharged by the discharging means. Processing And an image forming apparatus. 9. An image forming apparatus for forming an image on an image forming medium, an instructing means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means Discharge means, and reversal supply means for reversing the front and back of the image forming medium on which an image has been formed by the image forming means, temporarily storing the medium in the storage section, and then supplying the medium to the image forming means again When the image formation on both sides of the image forming medium is instructed by the instruction means, the odd-numbered page images stored in the storage means are sequentially read, and the read images are sequentially read by the supply means. Forming an image on the first surface of the supplied image forming medium, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. Are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section in the order of storage in the storage section, and are discharged by the discharge means. (2) detecting means for detecting the conveyance error of the image forming medium during the processing by the second processing means; and removing the conveyance error detected by the detection means and storing the medium in the storage section Selecting means for selecting whether or not to discharge the image forming medium, and when the discharging of the image forming medium is selected by the selecting means, sequentially taking out the image forming medium from the storage section. Discharge above An image forming apparatus comprising: a third processing unit that discharges by means. 10. An image forming apparatus for forming an image on a medium on which an image is to be formed, an instruction means for instructing image formation on both sides of the medium on which the image is to be formed; Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a paper feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on the image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means A discharging unit, and a reversing supply unit for reversing the front and back of the image forming medium on which an image has been formed by the image forming unit, temporarily storing the medium in a storage unit, and re-supplying the image forming unit. And when the instruction means instructs image formation on both sides of the image forming medium, sequentially reads the odd-numbered page images stored in the storage means, and reads the read image by the supply means. Forming an image on the first surface of the image forming medium sequentially supplied, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even page stored in the storage unit when processing of an odd page image stored in the storage unit is completed by the first processing unit. Are sequentially read out, and the read out images are formed on the second surface of the image forming medium sequentially taken out of the storage section in the order of storage in the storage section, and the read-out images are discharged by the discharge means. 2 processing means; 1st detection means for detecting an abnormal conveyance of the image forming medium during the processing by the 1st processing means; and A second detecting means for detecting a medium conveyance error; and a process performed by the first processing means when the conveyance error is detected by the first detection means, after the conveyance error is released, and when the conveyance error is detected. Resuming means for resuming A selection unit for selecting whether or not to discharge the image forming medium stored in the storage unit after releasing the conveyance abnormality when the second detection unit detects the conveyance abnormality; And a third processing unit for sequentially taking out the image forming medium from the storage unit and discharging the medium by the discharging unit when discharge of the image forming medium is selected. . 11. An image forming apparatus for forming an image on an image forming medium, an instruction means for instructing image formation on both sides of the image forming medium, and sequentially reading images on one side of a plurality of documents in page units. Reading means for reading images on both sides of a plurality of documents one by one, page by page; storage means for storing the image in page units read by the reading means; and an image forming medium stored in a sheet feeding unit. Supplying means for supplying, image forming means for forming a read image read by the reading means on an image forming medium supplied by the supplying means, and discharging the image forming medium on which an image has been formed by the image forming means A discharging unit, and a reversing supply unit for reversing the front and back of the image forming medium on which an image has been formed by the image forming unit, temporarily storing the medium in a storage unit, and re-supplying the image forming unit. And when the instruction means instructs image formation on both sides of the image forming medium, sequentially reads the odd-numbered page images stored in the storage means, and reads the read image by the supply means. Forming an image on the first surface of the image forming medium sequentially supplied, supplying the image to the reverse supply unit,
A first processing unit to be stored in the storage unit; and an even-numbered page stored in the storage unit when processing of an odd-numbered page image stored in the storage unit is completed by the first processing unit. A second processing means for sequentially reading out the images, forming an image on the second surface of the image forming medium sequentially taken out from the storage section, and discharging the image by the discharging means; Detecting means for detecting the conveyance abnormality of the image forming medium during the processing by the processing means; and removing the image formation medium from the storage section sequentially after releasing the conveyance abnormality detected by the detection means, and conveying the medium. An image forming apparatus, comprising: a third processing unit configured to form an image indicating that the sheet is a sheet discharged due to an abnormality by the image forming unit and discharge the image by the discharging unit. 12. An image forming apparatus for forming an image on an image forming medium, a permission unit for receiving a recording medium on which usage information is recorded, and permitting use of image formation based on the recording content of the recording medium; Instruction means for instructing image formation on both sides of the image forming medium; reading means for sequentially reading images on one side of a plurality of documents in page units, or reading images on both sides of a plurality of documents one by one, page units A storage unit for storing an image in page units read by the reading unit; a supply unit for supplying an image forming medium stored in a sheet feeding unit; and a reading image read by the reading unit by the supply unit. Image forming means for forming on the supplied image forming medium, counting means for counting the number of image formations performed by the image forming means, and A discharging unit for discharging the formed image forming medium; and a reversal of reversing the front and back of the image forming medium on which an image has been formed by the image forming unit, temporarily storing the medium in a storage unit, and then resupplying the image forming unit. Supply means; and when the instruction means instructs image formation on both sides of the image forming medium, sequentially reads the odd-numbered page images stored in the storage means, and supplies the read image to the supply section. Forming an image on the first surface of the image forming medium sequentially supplied by the means, supplying the image to the reverse supply means,
A first processing unit to be stored in the storage unit; and an even page stored in the storage unit when processing of an odd page image stored in the storage unit is completed by the first processing unit. A second processing means for sequentially reading the images, forming an image on the second surface of the image forming medium sequentially taken out of the storage section, and discharging the image by the discharging means; Detecting means for detecting a conveyance abnormality of the image forming medium during the processing by the processing means, and removing the conveyance error detected by the detection means, and sequentially taking out the image forming medium from the storage section, A third processing unit for discharging by the discharging unit, and a fourth process for not adding the number of image formations performed on the sheet discharged by the third processing unit from the number of image formations counted by the counting unit. And an image forming apparatus.