JPS63134436A - Image forming device - Google Patents

Abstract

PURPOSE:To simply operate a double-sided copy and eliminate operational misses by providing an original judging means for judging the sequence of even or odd number of originals introduced into an original reading section and an original absence detecting means for detecting the absence of next original. CONSTITUTION:An main body 100, upon receiving a copy start signal, starts a well-known copy operation to copy a set number of copies. Then, transfer papers are stored on an intermediate tray 59 of a double-sided unit. When a series of copy operations are completed, the main body 100 judges the signal of original sensor 302 and copies the next original when the next original is present. In other words, when the copying of the back of transfer paper is judged to be necessary, the back is copied, and the transfer paper having double sides copied is discharged from the main body 100 to a sorter 400. When the final original is of even number one, the double-sided copying of transfer paper is completed, while the final copy having one side copied is discharged if the final original is of odd number one.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to an image forming apparatus such as a copying machine or a laser beam printer. Concerning the ejection of recording sheets.

(B) Conventional technology Conventionally, in image forming apparatuses that perform double-sided copying or multiple copying, when performing double-sided copying, an operator presses an operation key for double-sided copying to form an image on the surface of a recording sheet and record the image. The sheets are temporarily stored in the intermediate tray, then the original on the document table is replaced, and then an image is formed on the back side of the recording sheet.

(c) Problems to be solved by the invention By the way, when performing double-sided copying, the operator recognizes whether the number of original or manuscript sheets is an even number or an odd number, and if the number of sheets is even, the operator immediately finishes the copying work. However, when the number of sheets is an odd number, it is necessary to switch operations by pressing an operation key for single-sided copying at the time of the final document, which is cumbersome and leads to frequent operation errors.

4. Means for Solving the Problem The present invention is aimed at eliminating the above-mentioned problems, and includes a document discriminating means for determining the even or odd order of the manuscripts introduced to the manuscript reading section. , a document non-recognition means for recognizing that there is no next document to be guided to the document reading section, and when it is recognized that the document guided to the document reading section is an odd numbered document and there is no next document, the document is stored in the sheet storage section. It is characterized by ejecting a recording sheet.

(e) Operation Based on the above-described configuration, if the original introduced to the original reading unit is an odd-numbered original and there is no next original, the document is recorded on the first side corresponding to the original and stored in the sheet storage unit. The recorded recording sheet is ejected from the machine with one-sided recording intact.

(F) Embodiments Below, embodiments embodying the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing the overall configuration of an embodiment of an image forming apparatus to which the present invention is applied. The surface of a drum 1 is made of a seamless photoreceptor using a photoconductor and an electric conductor, and is rotatable. The main motor 3 is pivoted to the main motor 3, and starts rotating in the direction of the arrow by the main motor 3, which is activated in response to the depression of the copy start key. When the predetermined rotation of the drum 1 and the potential control process (preprocessing) are completed, the document placed on the document table glass 34 is illuminated by the illumination lamp 40 that is integrated with the first scanning mirror 39. The reflected light is reflected by the first mirror 39,
An image is formed on the drum 1 via the second mirror 36, the third mirror 37, the lens 35, and the fourth mirror 38.

The drum 1 is corona charged by the high pressure unit 2. Thereafter, the image irradiated by the exposure lamp 40 is exposed to slit light, and an electrostatic latent image is formed on the drum 1 by a known method.

Next, the electrostatic lJ image on the photosensitive drum 1 is developed by the developing roller of the developing device 7 and visualized as a toner image, and the toner image is transferred by the transfer charger 5.

The transfer paper in the upper cassette 13 or the lower cassette 14 is fed into the main unit by a paper feed roller 11 or 12, and is sent in the direction of the photosensitive drum 1 by a registration roller 15 with accurate timing, where it is aligned with the leading edge of the latent image. The leading edge of the transfer paper is aligned.

Thereafter, the transfer paper passes between the transfer charge N5 and the drum 1, so that the toner image on the drum 1 is transferred.

After the transfer is completed, the transfer paper is separated from the drum 1 by the separation charger 8, guided to the fixing device 32 by the conveyor belt 17,
It is fixed by applying pressure and heating, and then the discharge roller 1
9-1 and 19-2 are ejected from the aircraft.

After the transfer, the drum 1 continues to rotate, and its surface is cleaned by a cleaning device 6 comprising a cleaning roller and an elastic blade.

The pedicle 200 can be separated from the main body 100 and has a deck 54 capable of storing 2000 sheets of transfer paper and an intermediate tray 59 for double-sided copying. Also, 20
The lifter 54L of the deck 54, which can accommodate 00 sheets, is raised according to the amount of transfer paper so that the transfer paper always comes into contact with the paper feed roller 50.

For double-sided copying or multiplex copying, first, the paper discharge flapper 33 of the main body 100 is raised, and the copied transfer paper is stored in the intermediate tray 59 constituting the sheet storage section via the conveyance path 57 of the pennistal 200. At this time, during double-sided copying, the multiplex flapper 52 is lowered, and the transfer paper is transported through the conveyance path 57-
1 and move the multiple path 57-2 with the multiple flapper 52 raised during multiple copying. This intermediate tray 59
can store up to 99 sheets of transfer paper.

The stored transfer paper is pressed down by a weight 53 provided on an intermediate tray 59.

During the next reverse side copying or multiplex copying, the transfer paper stored in the intermediate tray 59 is moved one sheet at a time from the bottom to the path 58 by the action of the paper feed roller 51 and the weight 53.
are guided to the registration rollers 15 of the main body 100 through the.

In an automatic document feeder (ADF) 300, when an author places a document on a tray 301, a document sensor 302, which constitutes document non-recognition means, detects that the document is on the tray 301, and the pickup roller 303 and each other The document separation belts 304 and 305 that come into pressure contact separate one document from the plurality of documents placed on the tray 301 and convey it, and the full-surface belt 306 further conveys it onto the document table glass 34 that constitutes the document reading section. , the original is fixed at a predetermined exposure position on the original platen glass 34, and after copying is completed, the original is ejected to the original discharge tray 302, and the original is sent out one after another to automatically perform copying.

Furthermore, 400 is a collating device (sorter) that collates the copies ejected from the main body.

FIGS. 2A and 2B are plan views showing the entire operation section of the main body 100. FIG.

A double-sided key 101 is pressed to make a double-sided copy from a single-sided original, a double-sided copy from a double-sided original, or a single-sided copy from a double-sided original.

102 is saw 1, and if the key is used for sorter operation, it is lit in standard mode. Press to cancel or enter sort mode.

Reference numeral 103 denotes a page continuous copying key, which is pressed to copy the left and right pages of a document separately onto separate sheets.

104 is a zoom key, which is pressed to specify any magnification between 64% and 142%.

Reference numeral 105 denotes an ``o''/magnification key, which is pressed to automatically reduce or enlarge the original to match the specified copy paper size.

Reference numeral 106 is a fixed size scaling key, which is pressed when specifying reduction or enlargement of the fixed size.

107 is the same size key, and is pressed to make a copy of the same @ (original size).

Reference numeral 108 denotes an auto paper selection key, which is pressed to automatically select the most suitable copy paper according to the original size and specified magnification ratio.

Reference numeral 109 is a cassette selection key, which is pressed to select an upper cassette, a middle cassette, or a lower paper deck.

Reference numeral 110 denotes an AE key, which is pressed to automatically adjust the copy density according to the density of the original, or to cancel AE and switch to manual mode.

111 is a copy density key, which is pressed to manually adjust the copy density.

Numeric keypad 112 is pressed to set the number of copies. Also used to set * (asterisk) mode.

113 is the * (asterisk) mode setting key, which is pressed when setting multiple copies, group (collate), image shift, and original border erasure.

114 (Press this key to cancel the set number of copies. Also used to cancel the * (asterisk) mode.

115 is a stop key, which is pressed to interrupt continuous copying. The copy operation will stop after the copy at the point in time is completed.

116 is an all reset key, which is pressed to return to standard mode.

117 is a copy start key, which is pressed when starting copying.

118 is a preheating key, which is pressed to put the machine into a preheating state or cancel the preheating state. It can also be pressed to return to standard mode from the auto shut-off state.

If you use 119, the double-sided copy display will display double-sided copying from a double-sided original.
Lights up when you select 2-sided copy from a 1-sided original.

120 is a one-sided copy display, which lights up when one-sided copy is selected from a double-sided original.

121 is a duplex mode display, which lights up when duplex mode is selected.

Reference numeral 122 is a toner collection display, which lights up when the collection container is full of used toner. Copy keys will not be accepted while the light is on.

123 is the toner replenishment display!・Lights up when the fuel is insufficient. Copy keys will not be accepted while the light is on.

Reference numeral 124 indicates a forgotten original display, which lights up when the original is left on the original table glass for a predetermined period of time or more after copying is completed.

Reference numeral 125 indicates a paper feed lighting display, which lights up when a paper jam occurs.

The 2nd S (bl) 126 is a simulation monitor display that displays the flow of paper within the main body.This display is normally used, and if a paper jam occurs, the paper jam check display is displayed.

127 is a sort (collation) display, which lights up when the sort mode is selected and in that state.

128 is a page continuous shooting display, which lights up when page continuous shooting is selected.

129 is a magnification display, which displays the set magnification in %.

130 is an auto magnification display, which lights up when auto magnification is selected.

Reference numeral 131 indicates the same size display, which lights up when the same size is selected.

Reference numeral 132 indicates a standard size reduction display, which lights up when a standard size reduction is selected.

133 lights up when the standard size enlargement display is selected.

134 is an auto paper selection display, which lights up when auto paper selection is selected.

135 is the original orientation display, which indicates the orientation of the original (portrait/
(horizontal).

Reference numeral 136 is a paper supply display, which lights up when there is no paper in the selected cassette or deck, when the selected cassette is not set in the main body, or when the paper cover of the deck is open.

Reference numeral 137 indicates the cassette in use, which indicates which of the upper, middle, and lower cassettes or decks is selected.

138 is the *(asterisk) mode display, which lights up when the *(asterisk) mode is set.

139 is a copy number display, which displays the number of copies or a self-diagnosis code.

140 is a weight display, which lights up while the main body is warming up. Copying cannot be done while the light is on.

141 is an AE display, which lights up when AE (automatic density adjustment) is selected.

142 is a preheating display, which lights up when in the preheating state. Flashes when in auto shutoff mode.

In addition, in standard mode, when using RDF, the number of copies per copy is 1,
Settings include density AE mode, automatic paper selection, same size, and one-sided copy from one-sided original. When RDF is not used, the settings are one copy per copy, manual density mode, same size, and one-sided copy from one-sided original. The difference between when RDF is used and when it is not used is determined by whether or not a document is set in RDF.

Next, the operation control shown in FIG. 1 of the present invention will be explained.

FIG. 3 is a circuit block diagram for carrying out the present invention.
01 is the central processing unit (CPU), for example NEC's μC0
Use M87AD. A ROM memory 502 stores a control program list, and the CPU 501 controls the apparatus according to this program. 503 is a RAM which is a main storage device; 504 is an interface for outputting control signals to a load such as a main motor; 505 is an interface for inputting input signals from a tip sensor, etc.;
06 is an interface for controlling input/output of keys 507 and display 508. In addition, the display 50B
are LEDs for each indicator in Figure 2.

An LCD is used, and the keys 507 shown in FIG. 2 can be used to identify which key has been pressed using a known key matrix.

Next, a basic operation example when creating a double-sided copy will be described.

The operator loads a document on the document tray 301 of the automatic document feeder (ADF) 300, presses the duplex key 101 to set the duplex copy mode, and presses the copy start key 117 to start the duplex copying operation.

The automatic document feeder (ADF) first sends out the first document from the tray 301 using the pickup roller 303 and the document separation belts 304, 305, transports it to the exposure position on the document glass table 34, and transfers it to the exposure position. When the copy start signal is reached, a copy start signal is sent to the main body 100. Main body 1
When the printer 00 receives this signal, it starts a known copying operation and copies the set number of sheets. At this time, the transfer paper (recording sheet) is stored in the intermediate tray 59 of the duplex unit. When a series of copying operations is completed, the main body 1004 judges the signal from the original sensor 302, and if there is a next original, a copying operation is performed for the next original. In other words, if it is determined that copying to the back side of the transfer paper is necessary, the copying operation to the back side is performed, and the transfer paper that has been copied to both sides is transferred from the main body 100 to the sorter 40.
Ejected to 0.

The above operations are repeated in sequence, but when the final document is an even number, copies are made on both sides of the transfer paper as described above, and the copying operation is completed.

Furthermore, when the final document is an odd number, a copying operation as described below is performed.

First, the copying operation on the front side of the transfer paper is the same as the first operation, and when the set number of copies have been completed, the transfer paper is stored in the intermediate tray 59, and the main body 100 is operated by the automatic document feeder (ADF). ), but since there is no document in the document tray 301 at this point, the document sensor 302 sends a document empty signal indicating that the document is empty.When this document empty signal is detected, A timer activation circuit (not shown) locks the transfer operation using a timer (not shown), and transfers the transfer paper stored in the intermediate tray 59 from the main body 100 to the sorter 400 within a predetermined time set by the timer. At this time, only when the document empty signal is given, the timer starts and prevents the transfer operation, etc., and only the rollers and belts for conveyance to discharge the accumulated transfer paper are operated. Sorter 40
The transfer paper is ejected to the sorter 400 (directly, intermediate) and by an ejection roller (not shown) disposed separately from the lay.
It may be discharged.

FIG. 4 is a control flowchart of the above-mentioned operation,
In step 1, the document sensor 302 detects the presence or absence of a document in the tray 301, and when it is determined that the document is present in the document tray, the process proceeds to step 2, and step 2 is repeated until the copy start key is pressed. Here, when the copy start key is pressed, the process proceeds to step 3, where one document is separated from the document tray 301, and in step 4, the document is conveyed to the exposure position, and upon completion of feeding, the process proceeds to step 5, where the copying operation is started. is started. In the next step 6, it is determined whether the reading order of the original at the exposure position at the end of the copying operation is an even number or an odd number. If it is an even number, the process proceeds to step 7, the original is ejected, and the transfer paper is loaded. It is discharged from the main body 100 to the outside of the machine. In step 8, the document sensor 302 detects the document, and if the determination is positive, the process returns to step 3, and if the determination is negative, the operation is ended.

In step 6, if the reading order of the original is an odd number, the process proceeds from step 6 to step 9, in which the original is ejected and the transfer paper is ejected to the intermediate tray 59, and in step 10 it is determined whether or not there is an original. Make a judgment. If the judgment is affirmative here, the process returns to step 3, and if the judgment is negative, the timer is activated in the Stella 11 in order to discharge the transfer paper stored in the intermediate tray 59 to the outside of the machine, and the timer is activated until the set predetermined time elapses. Step 12 is repeated and after a predetermined period of time has elapsed, step 13 is performed.
7ζ, the transfer paper is discharged from the middle IIl+-ray 59 in the duplex unit to the outside of the main body 100, and the operation is completed.

In the above-mentioned embodiment, the absence of the next document to be placed on the document reading unit is recognized by detecting the absence of the document by the document sensor 302. However, the present invention is not limited to this. If the next document is not fed even after a predetermined time has elapsed after starting the post-timer, the absence of the next document may be recognized.

(g) As described in detail, according to the present invention, there is provided a document discriminating means for determining the even or odd order of the document guided to the document reading section, and a document discriminating means for determining the order of the even or odd number of documents guided to the document reading section tζ, and detecting whether there is no next document to be guided to the document reading section tζ. A document non-recognition means is provided, and when it is recognized that the document led to the document reading section is an odd numbered document and there is no next document, the recording sheet stored in the sheet storage section is discharged to the outside of the machine. , even when performing double-sided copying, the operator does not have to be aware of whether the number of original sheets is an even number or an odd number; if the number of original sheets is an even number, the operator automatically completes all double-sided copying, and copies the odd number of sheets. In this case, the final copying operation is completed with one-sided copying and then ejected, so the double-sided copying operation becomes easy and there are no operational errors.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a copying machine according to an embodiment of the present invention, and FIG. 2 is a diagram showing an operation section of the copying machine shown in FIG. 3 is a plan view showing the part (a). FIG. 3 is a control block diagram of the copying machine shown in FIG. 1, and FIG. 4 is a copying machine using an automatic document feeder (ADF). 34. Original reading section (original table glass), 59-sheet storage section (intermediate tray), 100...main body, 3
00...Automatic document feeder, 302...Document unconscious hand l52 (document sensor), 400...Sorter. Figure 3 Figure 4 (b) March 23, 1988

Claims (2)

[Claims] (1) A sheet storage section is provided for storing recording sheets to be fed again to the image forming section, and recording sheets corresponding to a predetermined document guided to the document reading section when double-sided recording mode is selected are stored in the sheet storage section. In the image forming apparatus, the image forming apparatus includes: a document discriminating means for determining the order of even or odd numbers of the documents guided to the document reading section; and a document non-recognizing means for recognizing whether there is no next document to be guided to the document reading section. An image forming apparatus comprising: a recording sheet stored in the sheet storage section is ejected when it is recognized that the document guided to the document reading section is an odd numbered document and there is no next document. (2) The image forming apparatus according to claim 1, wherein the document non-recognition means is a document detection sensor that detects the presence or absence of a document.