JPS6266251A - Double surface copying device - Google Patents

Abstract

PURPOSE:To regularly execute double surface copying and counting action in a short time by having a means to set the odd number and the even number of the number of sheets of original and a means to count the number of sheets of original by a circulating type original feeding means when the setting means is not set. CONSTITUTION:The titled device has the means to input beforehand whether the number of sheets of the original is an odd number or an even number. For the method to input, inputting is executed by using a ten-key 112 of the operating part and an asterisk key 113. At the time of the designation of the number of sheets of the even number, the designation of the number of sheets of the odd number is automatically released, and reversely, at the time of designation of the number of sheets of the odd number, the designation of the number of sheets of the even number is automatically released. In such a way, at the time of the mode to prepare the double surface copy from the single surface original, the counting action of the number of sheets of the original can be omitted. By releasing the mode, the counting action can be also executed in accordance with the necessity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a copying apparatus having a double-sided copying function.

[Prior art]

Conventionally, when converting a single-sided original to a double-sided original using this type of device, there is no problem if the original is an even number, but if the original is an odd number, for example 3, copying from page 3 results in the problem shown in Figure 7. In this way, pages 2 and 3 are formed on one sheet of paper on the front and back sides, and page 1 is combined with a blank page, which may be unnatural.

Therefore, it has been proposed to first count the number of original sheets and determine whether the number is odd or even, and if the number is odd, one-sided copying is performed for only the last page, and double-sided copying is performed for the remaining pages.

However, in order to count the number of original sheets,
There was a drawback that it took a long time to start the copying operation.

In particular, when the number of originals is small, the operator often waits near the copying machine until the copying is finished, so the time it takes to complete a copy can often feel like a chore.

〔the purpose〕

The present invention has been made in view of the above points, and an object of the present invention is to provide a double-sided copying device that can perform regular double-sided copying in a short period of time and can also perform a counting operation when there are many original sheets.

That is, in a copying apparatus having a circulating original feeding means and a single-sided copying means, there is a setting means for setting whether the number of originals is an odd number or an even number, and if the setting means is not set, the circulating original H4 feeding means is provided. The present invention provides a double-sided copying apparatus having a means for counting the number of original sheets.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the overall structure of an embodiment of an image forming apparatus to which the present invention is applied.

In the figure, the surface of the drum 1 is made up of a seamless photoreceptor using a photoconductor and an electric conductor, and is rotatably supported by a main motor 3 that is activated in response to pressing the copy start key.
starts rotating in the direction of the arrow. 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. Second mirror 36.
The image is formed on the drum 1 via the third mirror 37° 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 the slit x.
An electrostatic latent image is formed on the drum 1 in a known manner.

Next, the electrostatic latent 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 paper feed rollers l or 12, and is sent toward the photosensitive drum 1 with accurate timing by registration rollers 5, so that the leading edge of the latent image and the transfer paper The tip of the holder and the tip of the holder will fall. Thereafter, the transfer paper passes between the transfer charger 5 and the drum 1, so that the toner image on the drum 1 is transferred.

32, where it is fixed by pressure and heat, and then discharged to the outside of the machine by discharge rollers 19-1 and 19-2.

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

The bedista rack 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, 2
The lifter 54L of the deck 54, which can accommodate 000 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 via the conveyance path 57 of the bed disk 200. At this time, the multiplex flapper 52 is lowered during double-sided copying, and is raised during multiplexed copying.This intermediate toy 59 can store up to 99 sheets of transfer paper. The stored transfer paper is placed in the intermediate tray weight 5.
It is held down by 3.

During the next reverse side copying or multiplex copying, the transfer paper stored in the intermediate tray 59 is moved one by one 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.

300 is a circulating document feeder (RDF).

301 is a loading tray for setting originals, 302.303
denotes a document size detection sensor, which is provided at a predetermined interval in a direction perpendicular to the paper surface. The size of the document in the 111 direction can be determined by checking whether both sensors 302 and 303 are detecting the document, or whether only sensor 303 (assuming that 303 is located on the back side of the paper) is detecting the document. Note that by increasing the number of sensors, more accurate size can be determined. Also, the size in the length direction is sensor 3
This can be determined based on the time during which 03 (302) detects the original.

In addition, in this RDF 300, the document sent from the stacking tray 301 to the exposure surface through the sheet bus 304 is sent through the sheet bus 305 and returned to the stacking tray 300.
It can be loaded onto.

Note that the detailed operation of RDF is described in detail in Japanese Patent Application No. 59-206619 filed by the present applicant, and will therefore be omitted here.

Furthermore, 400 is a sorter, which collates the copies ejected from the main body.

FIGS. 2(a) and 2(b) are plan views showing the entire operating section of the main body lOO.

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.

Reference numeral 102 is a sort key which is lit in the standard mode when only one sorter is provided. 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 is an auto-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, which is pressed to make a same size (original size) copy.

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

A cassette selection key 109 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 book (asterisk) mode.

Reference numeral 113 is a tree (asterisk) mode setting key, which is pressed to set multiple copy, group (collate), image shift, original frame erase, and sheet frame erase.

114 is a clear key, which is pressed to cancel the set number of copies, and also used to cancel the book (asterisk) mode.

A stop key 115 is pressed to interrupt continuous copying, and the copying operation is stopped after the copying at the time of pressing 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 to start copying.

Reference numeral 118 denotes a preheating key, which is pressed to put the machine into a preheating state or cancel the preheating state, and also to return to the standard mode from the auto shut-off state.

119 has double-sided copy display. Double-sided copy from double-sided original,
Lights up when you select 2-sided copy from a 1-sided original.

Reference numeral 120 indicates a one-sided copy and lights up when one-sided copy is selected from a one-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 is lit when the collection container is full of used toner and does not accept a copy key while 0 is lit.

123 is a toner replenishment display, which lights up when toner 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.

126 in FIG. 2(b) is a simulation monitor display that displays the flow of paper within the main body. Note that this display is normally displayed, and when a paper jam occurs, the paper jam check display is displayed.

127 is a sort (T match) display, which lights up when the ☆-to mode is selected and in that state.

Reference numeral 128 indicates a page continuous copying display, which lights up when page quick copying 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.

Reference numeral 133 indicates a standard size enlargement display, which lights up when a standard size enlargement 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 a tree (asterisk) mode display, which lights up when the book (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. Copies cannot be made while the light is on.

141 lights up when AE large display and AE (automatic 1 degree adjustment) are selected.

142 is a preheating display, which lights up when in the preheating state. Is it possible to deduct points when in auto shutoff mode? r litigationkg
m s-< I-) W n W m 田r -ya
J+-+P: 1 sheet per page, density AE mode, automatic paper selection, same size, and 1-sided copy from 1-sided original. R
When DF is not used, the settings are 1 copy per copy, manual density mode, same size, and 1-sided copying from a 1-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 shows a circuit protocol for carrying out the invention. 503 is a RAM memory which is the main storage device;
04 is an interface for outputting control signals to loads such as the main motor, 505 is an interface for inputting input signals from the image tip sensor, etc., and 506 is an interface for input/output control of keys 507 and display 508.

Note that the display 508 is an LED for each display shown in FIG.
, 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, an example of the operation of the above-mentioned copying apparatus will be described. This apparatus has means for inputting in advance whether the number of original sheets is an odd number or an even number. The input method is to use the numeric keypad 112 and asterisk key 113 of the operation unit shown in FIG.

In other words, by pressing a key such as [3] [I], the CPU determines this and latches the mode in the RAM. Here, 1st-fold indicates the specification of an even number of originals, and 1st [3] indicates the specification of an odd-numbered manuscript. Note that when an even-numbered copy is specified, the odd-numbered copy is automatically specified. On the other hand, if an odd number of copies is specified, the even number of copies will be automatically canceled. This makes it possible to omit the operation of counting the number of original sheets in the mode of making double-sided copies from single-sided originals. Furthermore, by canceling this mode, it is also possible to perform a counting operation as necessary. Note that the mode can be canceled by pressing the +5tnv key. It is also possible to obtain double-sided copies from originals of different sizes. FIG. 4 is a control flowchart of the above-mentioned operation.

First, determine whether the number of originals is odd or even (step 1), and if so, feed the last page of the originals stacked on the stacking tray (step 3).
and the sensor 302 (303
) to detect the original size. Step 4) Select the cassette containing the most suitable copy paper based on the detected original size and the set copy magnification, feed the copy paper, make only one-sided copies, and send it out of the machine. Drain (steps 5-8)
, As a result, only the final page of Saiyanagi will be a Katato copy, and each first page will not be combined with a blank page. Also, if odd or even number of sheets is not specified, the originals stacked on the stacking tray The documents are fed one by one, the number of documents is counted, and the documents are ejected to be stacked on the stacking tray again (steps 9 to 11).
Repeat this step until all originals have been fed (step 12). When finished, determine whether the counted number of originals is an odd number or not (step 13); if it is an odd number, execute steps 3 to 18 to copy only the last page on one side. do.

When the number of original sheets is even, or when an even number of sheets is specified, the original is fed from the stacking tray, the original size is detected,
Select the most suitable cassette, feed the copy paper, and
Make a copy of the side and store it in the intermediate tray (Step 1
4-19).

Then, the document to be copied onto the second side is fed, the document size is detected, the optimal copy magnification is determined from the size of the copy paper on which the first side was copied and the original size, the lens is moved, and the intermediate tray is From step 25), it is necessary to judge whether copying of all originals has been completed, and if not, the first
In step 26), the remaining originals are copied.

In the above description, the automatic paper selection function (APS) is activated for the first side of double-sided copying, and the automatic magnification selection function (AMS) is activated for the second side. This mode is set by pressing the key GII (2). This mode can be set as needed, so if you do not want to set this mode, please select it first. Against APS
seems to be working efficiently.

That is, when documents of mixed sizes are loaded, the size is detected for each document, but when documents are of the same size, only the size of the first document is detected. If you simply specify APS, you will be in the latter mode, but if you press the key like 1 (3), the mode will be mixed. Figure 5 shows APS when using RDF.
2 is a control flowchart. First, the copy key is pressed, and if APS mode is set, one original is fed (Step 30). When the sensor detects the original, the size (width, length) of the original is detected, and this size is used as the next one. It is held until detection (steps 31 and 32). When the document feeding is completed, the cassette containing the most suitable copy paper is selected based on the copy magnification and document size, the copy paper is fed, and copies are made (steps 33 to 36), and all the documents have been copied. Step 37)
If there is an uncopied original in the loading tray, it is determined whether the mixed loading mode is set (step 38).
, if it is set, repeat the process from step 30 again, if it is not set, feed one original, hold it first, then feed the copy paper of a certain size, and when the original feeding is completed Copy (steps 39 to 42)
), the process from step 37 is repeated again.

Next, we will explain multi-copy when using the intermediate tray, such as double-sided copying or temporary multiple copying.0 For example, the upper limit of the number of sheets that can be stored in the intermediate tray is 99 sheets.0 Setting 50 originals from a single-sided original to the RDF in double-sided copy mode. death,
If the number of copies (number of copies) is 120, the number of copies exceeds the upper limit of 21 sheets for the intermediate tray. The first side of 99 sheets is copied and stored in the intermediate tray. Next, the first original is ejected to the stacking tray, the second original is fed, and the copy paper is fed from the intermediate tray. 99 sheets of the second side are copied and discharged outside the machine.The original is circulated by the 0th order RDF, and the first sheet of the original is ready to be fed. Then, the first original is fed again, and 120 copies are obtained by feeding the remaining 21 originals. After the third document, the same process as described above is performed and the operation ends. As a result, 120 copies of each of the 25 double-sided copies can be made.

FIG. 6 shows a control flowchart of the above operation. First, there are three variables (δHO, AMARI.

1) If the number of copies is larger, calculate the quotient of [number of copies ÷ upper limit number of sheets on the intermediate tray] and the remainder (step 52).
, the quotient is assigned to the variable SHO, and the remainder is assigned to the variable AMARI (step 53).

Then, feed one document (step 54), assign the upper limit number of sheets on the intermediate tray to the variable MAX (step 55), copy the first side to QM step 5 (step 7), and decrement the value of the variable MAX from 1 to 55). (step 58). Then, it is determined whether the variable MAX is the same, that is, whether the number of copies equal to the upper limit number of sheets on the intermediate tray has been copied (
Step 59).

If MAX=O, return the copy slightly, MAX=0
If so, it is determined whether the inspected copy is a copy of the second side (step 60), and if it is not the second side, the next original is fed and the process from step 54 is performed in order to copy the second side. Repeat, if it is a copy of the second side, decrement the value of the variable SHO by one (step 61), if SHO is 0,
That is, it is determined whether the remaining number of copies is greater than or equal to the upper limit number of sheets on the intermediate tray (step 62). If 5HO = 0, the original is circulated until the original whose first side has been copied using RDF is ready to be fed (step 63), and the process from step 54 is repeated again to copy the remaining number of copies. If 5HO=O, the variable AMARI is O1, that is, it is determined whether there are any remaining copies or not.Step 64
), if AMARI=0, the original is circulated until the original whose first side has been copied using RDF can be fed (step 65), and the process proceeds to step 68. Also, if the number of copies is less than the upper limit number of sheets on the intermediate tray in step 51, the number of copies is substituted into the variable AMARI (step 66).
, feed one document (step 68), variable AMARI
Decrement by one step 69), and set the variable AMA
It is determined whether the value of RI is O1, that is, whether the necessary number of copies have been completed (step 70).

If AMARI is not 0, repeat copying and AMAR
If I=O, it is determined whether the copy just made is the second side (step 71). If it is not a copy of the first side, feed the next original and repeat the process from step 67 to copy the second side.If it is a copy of the second side, check whether copying has been completed for all originals. If it is not completed, the process from step 53 is repeated to make a double-sided copy of the next page. In this way, double-sided copies exceeding the number of sheets that can be stored in the intermediate tray are obtained. It will be done.

In addition to the method described above, it is also possible to perform double-sided copying for all originals using the upper limit number of sheets on the intermediate tray, and then double-sided copying for the remaining number of copies for all originals again.

〔effect〕

As described above, according to the present invention, it is possible to obtain double-sided copies in which the positions of the copied pages are regular regardless of the number of originals in a short period of time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a copying machine to which the present invention can be applied, FIG. 2 is a diagram showing the operation section of the copying machine shown in FIG. 1, and FIG.
FIG. 4 is a control flowchart showing an example of the operation when making a double-sided copy from a single-sided original; FIG. 5 is a control flowchart showing automatic paper selection when using the document feeder. , FIG. 6 is a control flowchart for multi-copying when the intermediate tray is used, and FIG. 7 is a diagram showing an example of making double-sided copies. In addition, 59 is an intermediate tray, 300 is a circulation type document feeding device,
113 is an asterisk key. Double-sided Kohi 0-1

Claims (1)

[Claims] (1) In a copying apparatus having a circulation type original feeding means and a double-sided copying means, a setting means for setting whether the number of originals is an odd number or an even number, and if the setting means is not set, the circulation type original feeding means. 1. A double-sided copying apparatus, comprising means for counting the number of original sheets.