JPH1070632A - Copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain one-side/both side copying without losing convenience of an equipment and residence of paper in the equipment by discharging a form resident in the equipment after the end of copy operation when the number of originals recognized by the equipment is unmatched with the number of sheets of the originals to be copied. SOLUTION: A main control section of the equipment is provided with an original form presence sensor 25 sensing the presence of an original form, a paper presence sensor 26 sensing the presence of paper in a both side tray 18a, and a dissidence discrimination means 27 that discriminates unlatch between the number of originals set to the equipment and the number of actually copied originals to discharge paper form sheets resident in the both side tray 18a when the discrimination result indicates unlatch. Thus, even when the number of set originals is unlatch with the number of copied originals actually, it is discriminated and the forms resident in the both side tray 18a are discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying apparatus for reading an image on an original sheet and forming an image corresponding to the image on the sheet, and more particularly, to a copying apparatus capable of forming an image on both sides of the sheet. It relates to improvement of the device.

[0002]

2. Description of the Related Art Conventionally, as the copying apparatus, for example,
A document image reading unit that continuously reads an image of a document sheet,
There is a digital copying apparatus including an image processing unit that converts the read image into a predetermined output image and an image output unit that sequentially forms an image corresponding to the output image on a sheet.

The original image reading section includes a platen glass on which an original sheet is placed, an optical member movably disposed below the platen glass and irradiating a reading light to the original sheet, A light receiving element that reads the light reflected by the original paper as a large number of pixel data, and an original tray on which a plurality of original papers are placed with their image surfaces facing up,
A document sheet transport member for transporting the document sheets on the document tray in order from the lower side to the platen glass.

The image output unit includes a rotatable photosensitive drum, a charger for charging the photosensitive drum to a predetermined potential, and exposing the photosensitive drum according to the output image. The apparatus includes a laser exposure device for forming a latent image, a developing device for developing the latent image to form a toner image, a transfer device for transferring the toner image to a sheet, and a fixing device for heating and pressing the sheet.

When a plurality of original sheets are placed on the original tray with their image surfaces facing upward, the copying apparatus conveys the original sheets one by one sequentially from the last page to the platen glass. The image is copied by reading the image of the original paper on the glass and sequentially forming the corresponding image on the paper.

In the above-described copying apparatus, a double-sided tray or the like for storing a sheet having an image formed on the surface is provided so that the sheet can be again supplied to the image output unit. The one that can form is widely used.

[0007] In such a copying apparatus, it is necessary to switch the copying operation in accordance with the number of original sheets placed on the original tray. Specifically, when the number of the original sheets is an even number, the copying apparatus may form images on both sides of all the sheets while sequentially reading the originals placed on the original tray. On the other hand, if the number of the original sheets is an odd number, the copying apparatus sequentially reads the originals placed on the original tray, forms an image on only one side of the first sheet, and then reads the image on the other side. Images must be formed on both sides of the paper. The operation of reading one side of an original sheet and forming it on both sides of the sheet is called a single-sided double-sided copying operation.

Therefore, in a copying apparatus constructed so that an image can be formed on both sides of a sheet, when performing a single-sided double-sided copying operation, the number of original sheets placed on the original tray is counted before the copying operation. The copying operation is switched according to the result, or
A configuration in which an even or odd number of document sheets placed on a document tray is set, and the above-described copying operation is switched in accordance with the setting, has been widely used.

[0009]

However, in the copying apparatus, if the original sheets are multi-fed at the time of counting the number of original sheets, or if the even or odd number of original sheets is set incorrectly. If
Furthermore, if the original sheets are double-fed when reading the original sheets, the number of original sheets recognized by the copier does not match the number of original sheets actually copied. I will. As a result, in the copying apparatus, the copying operation ends when the original sheets on the original tray are finished, and the last sheet remains on the double-sided tray, and as a result, it was not possible to appropriately form a copy process. Without knowing, the user assumes that the processing has been completed, and unnecessary paper remains in the apparatus.

Japanese Patent Application Laid-Open No. 4-340858 discloses that when performing a one-sided and two-sided copying operation, the original sheet is placed on the original tray in the other copying operations, even though the original sheet is placed with its image surface facing upward. The original sheet is placed with its image surface facing down, and reading is performed from the first page of the original sheet, so that the original sheet is formed on the sheet in order from the first page and the original sheet on the original tray is A copying apparatus is disclosed in which when the printing is completed, the sheet corresponding to the final document is discharged only by reversing the sheet without sending it to the double-sided tray. In the copying apparatus, there is no need to make the copying apparatus recognize the number of original sheets, so that the above mismatch does not occur, and the last sheet does not remain on the double-sided tray.

However, in the copying apparatus, the mounting direction (front and back) of the original placed on the original tray must be switched according to the type of the original and the desired copying operation.
Note that the sheet on which the image is formed also has the first page down in the one-sided and two-sided copying operation, and is placed in a different order from that of the other copying operations (that is, for each copying operation, The order of paper ejection is different). Further, in the copying apparatus, the original sheet placed on the original tray must be turned over once and turned over, and then supplied to the platen glass.

Therefore, in the copying apparatus, the original sheet must be placed in consideration of the orientation of the original sheet when performing the copying operation. Since it takes time, the convenience as an apparatus is greatly impaired.

It is an object of the present invention to provide a copying apparatus capable of performing a single-sided and double-sided copying operation without impairing the convenience of the apparatus and without causing paper to remain in the apparatus. It is in.

[0014]

That is, the present invention relates to a copying apparatus capable of continuously reading an image on one side of a document sheet and forming an image corresponding to the read image on both sides of the sheet. A mismatch discriminating means is provided for judging that the number of recognized document sheets and the number of actually copied document sheets do not match. If the discrimination results do not match, the discarding device remains in the apparatus. This is a copier that discharges the paper that is present.

The discrepancy discriminating means only needs to discriminate the discrepancy between the number of document sheets recognized by the apparatus and the number of document sheets to be actually copied. In a copying apparatus on which a document sheet is placed, when the document sheet in the document tray runs out, the number of conveyed document sheets is compared with the number of document sheets recognized by the apparatus to determine a mismatch. Or when the original paper in the original tray runs out in a copying machine that places original paper on the original tray,
The discrimination may be made by judging whether or not the sheet is being conveyed to the sheet reversing conveyance path in the apparatus.

The number of original sheets recognized by the apparatus means the number of original sheets set in the apparatus prior to the copying operation. For example, the number of original sheets placed on the original tray The setting can be performed by counting the number of sheets prior to the copying operation, and the setting can also be performed by allowing the user to set an even or odd number of the document sheets placed on the document tray. .

In the present invention, the above-described copying apparatus is basically provided as long as it can continuously read an image on one side of a document sheet and form an image corresponding to the read image on both sides of the sheet. Good. As such a copying apparatus, there is, for example, the digital copying apparatus described above, or an analog copying apparatus that exposes a document and forms an electrostatic latent image using the reflected light.

The copying apparatus may be any one capable of discharging the sheet remaining in the apparatus when the discrimination results do not match. For example, a sheet conveying member for conveying the sheet (for example, the sheet reversing member) What is necessary is just to comprise so that the paper conveyance member which comprises a conveyance path) may be operated according to the said determination result.

In the copying apparatus of the present invention, there is provided a mismatch discriminating means for judging that the number of original sheets recognized by the apparatus does not match the number of original sheets actually copied. If the result is inconsistent, the paper remaining in the apparatus is ejected after the copying operation is completed. If the number of original sheets to be copied does not match, the sheets remaining in the apparatus can be discharged.

Further, in the copying apparatus, since the apparatus is made to recognize the number of sheets of the original, the mounting direction (front and back) of the original is switched during the one-sided and two-sided copying operation, or the conveying path of the original sheet is changed. There is no need to switch.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIG. 1 shows a copying apparatus according to Embodiment 1 of the present invention. The copying apparatus includes: a document image reading unit that reads an image of a document sheet; an image processing unit 6 that converts the read image into a predetermined output image; an image output unit that forms the output image on a sheet; A post-processing unit that performs post-processing and a main control unit that appropriately controls the above-described units according to settings.

The original image reading section includes a platen glass 1 on which an original sheet is placed, an optical member 2 movably disposed below the platen glass 1 and irradiating the original sheet with a reading light. A light receiving element 3 for reading reflected light of the reading light from the document sheet as a large number of pixel data; a document tray 4 on which a plurality of document sheets are placed with their image surfaces facing up; A document sheet transport member 5 for transporting the document sheet to the platen glass 1 in order from the lower side.

The original image reading section can read the image of the original sheet if the original sheet is placed on the platen glass 1.
When a plurality of original papers are placed on the platen glass, the original papers can be sequentially conveyed to the platen glass 1 to sequentially read the image of each original paper.

The image processing section 6 converts the read image into a predetermined output image. Basically, the image processing section 6 forms the same image as the image on the original sheet on the original sheet. The image density is corrected in consideration of the characteristics of the reading unit and the image output unit.

The image output section includes a rotatable photosensitive drum 7, a charging device 8 for charging the photosensitive drum 7 to a predetermined potential, and a photosensitive drum 7 corresponding to the output image. A laser exposure device 9 for exposing to form a latent image;
A developing device 10 for developing the latent image to form a toner image;
A transfer unit 11 for transferring the toner image onto a sheet (hereinafter, a portion between the photosensitive drum 7 and the transfer unit 11 is referred to as a transfer position);
A fixing device 12 that heats and presses the paper (hereinafter, a position of the fixing device 12 where the paper is supplied is referred to as a fixing position), a plurality of paper trays 13 and 14 that can store a large number of papers,
A discharge roll 15 for discharging the paper, a carry-in side paper transport member 16 for transporting the paper from predetermined paper trays 13 and 14 to a transfer position, and a discharge roll 1 for transporting the paper having passed the fixing position
And a reverse paper transport member 18 that pulls in the paper from between the fixing position and the discharge roll 15, reverses the transport direction of the paper, and supplies the reverse to the carry-in side paper transport member 16. And The reversing sheet transport member 18 has a double-sided tray 18a that can temporarily store sheets and remove electricity from the sheets.

The image output section unloads the sheet from predetermined sheet trays 13 and 14, passes the sheet through the transfer position and the fixing position, and discharges the sheet by the discharge roll 15. An image can be formed on one side of the sheet, and the sheet that has passed the fixing position is again inverted in the reversing sheet transport path 18, the sheet is again passed through the transfer position and the fixing position, and the sheet is further An image can be formed on both sides of the sheet by discharging with the discharge roll 15.

The post-processing section includes a carry-in roll 19 for carrying the paper discharged from the discharge roll 15, a discharge tray 20 for sequentially storing the paper, and a separate tray for storing the paper. Multiple bin trays 21
A stapler (not shown) for stapling the sheets stored in the bin tray 21, a puncher (not shown) for punching the sheets stored in the bin tray 21, and a post-processing for discharging the sheets to the various trays 20 and 21. And a paper transport member 22.

Then, the post-processing section can collectively store the sheets by discharging the sheets to the discharge tray 20, and collectively store the respective sheets by discharging the sheets to the bin tray 21. Further, by performing stapling processing or punching processing on the paper on each bin tray 21, predetermined post-processing can be performed on each unit.

The main control section controls the operation of the original image reading section, the image processing section 6, the image output section and the post-processing section in accordance with the operation mode input means 23 for setting and inputting the operation mode. And a control main body 24.

The main control unit is set to perform a one-sided and two-sided copying operation, for example, in a state where no setting input is made (a so-called default state). Double-sided double-sided copy operation (operation to read both sides of original paper and form images on both sides of paper)
And a one-sided one-sided copying operation (an operation of reading one side of a document sheet and forming an image on one side of the sheet) and a predetermined post-processing. By setting the default state to the one-sided and two-sided copying operation, it is possible to suppress waste of paper.

When the single-sided and double-sided copying operation is selected, the copying apparatus sets the number of original sheets to be read in the copying operation, and switches the operation of the image output unit according to the setting. Specifically, when the number of the original sheets is set to an even number, the copying apparatus sequentially reads the image on one side of the original sheets placed on the original tray 4,
Images are formed on both sides of all sheets. On the other hand, when the number of the original sheets is set to an odd number, the copying apparatus sequentially reads the image of one side of the original sheet placed on the original tray 4 and places the image on the first sheet only on one side thereof. Is formed, an image is formed on both sides of the other paper.

In this embodiment, a document paper presence / absence detection sensor 25 for detecting the presence / absence of document paper on the document tray 4 and a paper presence / absence detection sensor 26 for detecting the presence or absence of paper in the double-sided tray 18a, A mismatch discriminating means for judging that the number of original sheets set in the apparatus and the number of actually copied original sheets do not match based on the information of the sensors and, The main control unit is configured to discharge the sheet remaining in the double-sided tray 18a when the numbers do not match.

More specifically, in the copying apparatus, as shown in FIG. 3, in the copying apparatus, the discrepancy judging means 27 judges the presence or absence of manuscript paper in the manuscript tray 4 (S1). In step S2, the discrimination determining means 27 continuously determines whether or not there is a sheet in the double-sided tray 18a (S2). On the other hand, the copying apparatus is configured to
If it is determined in the determination of the presence or absence of a sheet in the above, an abnormal processing operation is performed.

In the abnormal processing operation, the copying apparatus first discharges all the sheets in the double-sided tray 18a to a predetermined bin tray 21 (S3, S4), and then sets post-processing such as stapling. If the answer is YES, an inquiry is made as to whether or not to continue the post-processing (S5, S5).
6, S7), when continuing, the post-processing is performed (S8). It should be noted that the above inquiry may be similarly made for the bunching process.

Therefore, in the copying apparatus of the present embodiment, even if the set number of original sheets and the actually copied original sheet do not match, it is determined and the two-sided tray 1 is determined.
8a can be discharged. Further, in the copying apparatus, it is not necessary to switch the mounting direction (front and back) of the manuscript paper with respect to the manuscript tray 4 or to change the conveyance path of the manuscript paper during the one-sided double-sided copying operation. Therefore, the copying apparatus can prevent sheets from remaining in the apparatus after the completion of the copying operation without performing any special operation or operation during the one-sided and two-sided copying operations, thereby impairing the convenience of the apparatus. In addition, a single-sided and double-sided copying operation can be performed without any paper remaining in the apparatus.

[0037]

As described above, in the copying apparatus according to the present invention, the discrimination means for discriminating that the number of original sheets recognized by the apparatus and the number of original sheets to be actually copied do not match is provided. If the discrimination results do not match, the paper remaining in the apparatus is discharged after the copying operation is completed, so that no special operation or operation is performed during the one-sided and two-sided copying operations, and Since no paper remains in the apparatus after the completion of the copying operation,
The single-sided and double-sided copying operation can be performed without deteriorating the convenience of the apparatus and without leaving the paper in the apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a copying apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation control system in the apparatus of FIG.

FIG. 3 is an operation flowchart after a single-sided and double-sided copying operation of the apparatus of FIG. 1;

[Explanation of symbols]

4: Document tray, 25: Document paper presence detection sensor, 18
a: double-sided tray, 26: paper presence / absence detection sensor, 21: bin tray, 27: mismatch discrimination means, 24: control body.

Claims (1)

[Claims] 1. A copying apparatus capable of continuously reading an image on one side of an original sheet and forming an image corresponding to the read image on both sides of the sheet. A discrepancy discriminating means for discriminating that the number of original sheets to be copied does not match, and ejecting the sheet remaining in the apparatus when the discrimination result does not match. Copying equipment.