JPS6266277A - Copying device - Google Patents

Abstract

PURPOSE:To execute the efficient automatic paper selection even at the time of plural sizes by having the first mode operating an automatic paper selecting means at every sheet of the original supplied and the second mode operating the automatic paper selecting means only at the time of supplying the first original. CONSTITUTION:The size in the transverse direction of the original can be judged by detecting whether or not both sensors 302 and 303 detect the original and whether or not the sensor 303 (303 is located at the depth side of the paper surface) only detects the original. To both of the original of the same size as when the original with the different size is mixed, an automatic paper selecting function (APS) functions efficiently. Namely, at the time of mixing the size, the size is detected to the original one by one, and at the time of the same size, only the size of the first sheet is detected. Simply, when APS is designated, the latter mode is obtained.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a copying apparatus having a document feeding device.

[Prior art]

Conventionally, in this type of device, J! A function is being considered in which the size of the document is detected while the document is being fed by the document feeding device, and then a cassette containing paper of the optimum size is visually selected. However, since the copy paper cannot be fed until after the original size is detected, it takes time to start copying, and it takes a very long time when copying a large number of originals. Especially when the manuscripts were of the same size, it was a waste of time.

CLl] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a copying apparatus that can efficiently perform automatic paper selection and make copies whether the documents are of the same size or of a plurality of sizes.

That is, in an image forming apparatus having a document feeding means for feeding a document, and a sliding paper selection means for selecting an optimal size paper based on the document size and copying magnification, the document feeding is performed sheet by sheet by the automatic transmission. The automatic paper selection means has a first mode in which the automatic paper selection means is operated, and a second mode in which the automatic paper selection means is operated only when a single document is fed, and the first mode and the second mode An object of the present invention is to provide a copying apparatus having a mode selection means for arbitrarily selecting a mode.

〔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 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 drum 10 has completed a predetermined rotation and the potential control process (preprocessing) has been completed, the document placed on the document platen glass 34 is illuminated by the illumination lamp 40 that is integrated with the first scanning mirror 39. The light passes through the first mirror 39, the second mirror 36,
An image is formed on the drum 1 via 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 l by a known method.

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 the paper feed roller 11 or 12, and is sent in the direction of the photosensitive drum l by the registration roller 15 with accurate timing, so that the leading edge of the latent image and the transfer paper The tip of the shank matches the tip. 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 ram 1 continues to rotate, and its surface is cleaned by a cleaning device 6 comprising a cleaning roller and an elastic blade.

The pedista freezer 200 can be separated from the main body 100 and has a deck 54 that can store 2000 sheets of transfer paper and an intermediate tray 59 for double-sided copying.
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 stacking tray for setting documents, and 302 and 303 are document size detection sensors, which are provided at a predetermined interval in the direction perpendicular to the paper surface. The width direction size of the document is determined by the sensor 302.
Check whether both sensor 303 and sensor 303 are detecting the original.
303 located at the back of the paper surface), the determination can be made by checking whether only the original is detected. Note that by increasing the number of sensors, more accurate size can be determined. Also, the lengthwise size is sensor 303 (302)
This can be determined by the amount of time the device is detecting the original.

In addition, in this RDF 300, the document sent from the stacking tray 301 to the exposure surface through the sheet path 304 is sent through the sheet path 305, and then 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 T-combining device (sheeter) that 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 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.

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 button, 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 specified 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 is an AE main 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 an * (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 is a preheating key, which is pressed to put one machine into a preheating state or to cancel a preheating state. It can also be pressed to return to standard mode from the auto-shutoff state.

119 is double-sided copy display, double-sided copy from 6 double-sided originals,
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 a toner replenishment display, which is lit when toner is insufficient, and when 0 is lit, no copy key is accepted.

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.

%2[ff1(b) 126 is a simulation monitor display that displays the flow of paper within the main body. In addition,
This is normally the display, and if a paper jam occurs, the paper jam check display will appear.

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. - 131 is the actual size display and lights up when the actual 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 3 standard size enlargement is selected in the standard size enlargement display.

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

Reference numeral 135 is a document direction display which indicates the direction in which the document is set (vertical orientation device).

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.

137 shows the cassettes used, upper and middle rows.

Displays which of the lower cassettes or decks is selected.

138 is a tree (asterisk) mode display, which lights up when the zero (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 when the main body is turned on and the ohm is up. Copies cannot be made 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. Note that when using RDF, the standard mode is set to 1 copy per copy, density AE mode, auto paper selection 1 equal size, and 1-sided copy from a 1-sided original. When RDF is not used, the settings are 1 copy per copy, manual density mode, same size, and 1-sided copy 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 the keys 507 and display 50B.

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.9 This apparatus has a 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.

That is, by pressing a key such as ``--'', the CPU determines this and latches the mode in the RAM. Here, 蜓圓输 indicates the specification of an even number of manuscripts, and trouble (3) ■ indicates the specification of an odd number of manuscripts. Note that when an even number of pages is specified, the odd number of pages 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 [I1] 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, it is determined whether or not there is a designation as to whether the number of original sheets is an odd or even number (step 1), and if there is a designation, the counting operation for the number of original sheets is passed and it is determined whether or not an odd number of sheets has been specified (step 2). , if an odd number of sheets is specified, the last page of the originals stacked on the stacking tray is fed (step 3), and the sensor 30 provided in the RDF 300
2) (303) detects the original size. Step 4) Selects the cassette containing the most suitable copy paper based on the detected original size and the set copy magnification, feeds the copy paper, and performs one-sided copying only. Discharge outside the machine (steps 5 to 8). As a result, only the last page of the design surface is a one-sided copy, and the first page is not overlapped with a blank page. In addition, if an odd number or an even number of sheets is not specified, the documents stacked on the stacking tray are fed one by one, the number of documents is counted, and then a
Ejecting to be loaded onto a loading tray (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, repeat steps 3 to 18 to copy only the last page on one side. Execute.

When the number of originals is even, or when an even number of sheets is specified, the original is fed from the stacking tray, the original size is detected, the optimal cassette is selected, the copy paper is fed, and the first side is Make a copy and store it in the intermediate tray (step 14)
~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 explanation, 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 is problematic (3) ■ This mode is set by pressing the key when the machine is pressed.This mode can be set as required, so if you do not want to set this mode, select it first and then set the magnification and 0 as explained below. APS is designed to work efficiently for both originals of different sizes and originals of the same size.

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, it will be in the latter mode, but it will be in the flash mixed mode where you press the key like 蜓圓(3) 類. 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. Hold until detection (steps 31 and 32). Once the document feeding is complete, select the cassette containing the most suitable copy paper based on the copy magnification and document size, feed the copy paper, and make a copy (step 33 to 36), and then it is determined whether all the originals 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, the remaining 21 sheets are copied on the first side, stored in the intermediate tray, the second original is fed, and the second side is copied. You will get 120 copies. 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, three variables (8HO, AMARI.

MAX) to O (step 50), and compare the set number of copies (step 51). 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), assign the quotient to the variable SHO and the remainder to the variable AMARI (step 53).

Then, one sheet of the original is fed, step 54), step 7), and the value of the variable MAX is decremented by 1 (step 58).
Then, it is determined whether the variable MAX has been reached, 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, repeat copying, MAX=O
If so, it is determined whether the inspected copy is a copy of the second side (step 60). If it is not the second side, feed the next original and repeat the process from step 54 to copy the second side; if it is the second side, decrement the value of the variable SHO by one (step 61) .

Determine whether SHO is O1, that is, the number of remaining copies is greater than or equal to the upper limit number of sheets on the intermediate tray (step 62), 5HO=
If not, the original is circulated until the original whose first side has been copied using RDF is ready to be fed in step 63.
), step 54 again to copy the remaining number of copies.
Repeat the process from 5HO=O, then set the variable AMA
If RI is O1, that is, there are a number of copies remaining (step 64), and if AMARI is not 0, RDF
In step 65), the original is circulated until the original whose first side has been copied is ready to be fed, and the process proceeds to step 68. 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 @AMARI (step 66), and one original is fed (step 68).
, the variable AMARI is decremented by one (step 69), and it is determined whether the value of the variable AMARI is 0, that is, whether the required number of copies has been completed (step 70).

If AMRI = O, repeat copying, AM
If ARI=O, it is determined whether the copy just made is the second side (step 71), and if the first side is not copied, the next original is fed and the second side is copied (step 67). Repeat the process. If it is a copy of the second side, it is determined whether copying has been completed for all originals (step 72); if not, the process from step 53 is repeated to create 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 can be obtained.

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 efficiently automatically select copy paper even if originals of different sizes are mixed or are the same original.

[Brief explanation of drawings]

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 block diagram of the copying machine shown in Fig. 4. Fig. 4 is a control flowchart showing an example of operation when obtaining a double-sided copy from a single-sided original. Fig. 5 is a control showing automatic paper selection using the original feeding device. FIG. 6 is a flowchart showing a multi-copy control flow when an intermediate tray is used, and FIG. 7 is a diagram showing an example of making a double-sided copy. In addition, 59 is an intermediate tray, 300 is a circulation type document feeding device,
113 is an asterisk key.

Claims (2)

[Claims] (1) In an image forming apparatus having a document feeding means for feeding a document, and an automatic paper selection means for selecting an optimal size paper from the document size and copying magnification, the automatic paper a first mode of operating the selection means;
A second mode in which the automatic paper selection means is operated only when the first document is fed, and a mode selection means in which the first mode and the second mode are arbitrarily selected. A copying device that uses (2) The copying apparatus according to claim 1, wherein when the second mode is selected, the second and subsequent documents are copied in the paper size selected for the first page.