JPH04145457A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent an image formation from being erroneously carried out on a transfer sheet for a cover by automatically releasing a cover forming mode and obtaining the selection input standby of a paper feeding means when the set number of originals is one at the time of the setting of the cover forming mode. CONSTITUTION:When the cover forming mode is instructed/inputted by an instructing/ input means, a recording medium for the cover is supplied to image forming means 110 and 120 by one of recording medium supplying means 131D, 132D, 133D, and 134D, with respect to, at least, one of the head image to be formed or the last image to be formed, and the recording medium field inside is supplied to the image forming means 110 and 120 by other recording medium supplying means 131A-134A, 131B-134B, and 131C-134C, with respect to the other images. However, when the count value of the number of the originals is one, at the time of the instruction of the cover forming mode, the cover forming mode is released, and the input standby of the selecting/instructing input means of the recording medium supplying means at the time of the image formation is carried out. In other words, when the cover forming mode is set, and the set number of the originals is one, the cover forming mode is automatically released, and the selection input standby of the paper feeding means is carried out.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus, and particularly to an image forming apparatus that sequentially forms a series of images on special paper for front and back covers and plain paper for saddle stitching. The present invention relates to a forming device.

[Conventional technology]

Conventional image forming devices, such as copying devices, have multiple types of transfer paper of different sizes for transferring and recording images, and these can be selectively fed according to the original size and copying magnification. It has become. However, recently, in addition to the difference in the size of transfer paper, there is also a means to store special paper for use as a cover, and when necessary, special paper can be selectively fed in the same way as transfer paper (plain paper). Equipment is provided for recording on special paper. In such devices, usually in a mode called cover mode,
Special paper is fed only for the first original, only the last original, or both the first original and the last original, and transfer paper is fed for other originals. As such a device,
For example, there is a device disclosed in Japanese Unexamined Patent Publication No. 1-23236.

[Problem to be solved by the invention]

By the way, when the cover mode is selected, when a start instruction is given, the mode is executed without detecting the number of originals, so if only one original is set, the original image will be displayed on the special paper. was recorded in. Normally, if there is only one original, cover paper is often not required, and operators who copy without realizing that the cover mode has been set may end up copying onto recording paper that does not meet their wishes. This caused a problem.

An object of the present invention is to provide an image forming apparatus that reduces copy mistakes.

[Means to solve the problem]

The image forming apparatus of the present invention includes an instruction input means (28) for inputting an instruction for one cover forming mode, and an image forming means (110, 1).
20) A plurality of recording medium supply means (+31A-131D, +
328-1320, 133A-133D, 134^-
+34D) and a cover forming mode instruction input, one of the recording medium supply means (1310, 132D,
+330. +34D) and the image forming means (110,1
20) for the cover, and another recording medium supply means (1318-+34A) for other images.

131B-134B, +3IC-134C) for supplying recording media for saddle stitching to the image forming means (110, 120). , 400) ; Selection instruction input means (10) for inputting a selection instruction for selecting a recording medium supply means for supplying a recording medium during image formation;
And, when the cover forming mode is instructed, the counting means (
200, 400) is 1, the cover forming mode is canceled and the control means (400) waits for an input from the selection instruction input means (10).

Note that the symbols in parentheses are elements corresponding to the embodiments described later.

[Effect]

According to this, when the cover forming mode is instructed and the count value of the counting means (200, 400) is 1, the control means (400) cancels the cover forming mode and selects the selection instruction inputting means (10). Waits for input.

That is, when the cover forming mode is set, if the number of originals set is one, the cover forming mode is automatically canceled and the apparatus waits for inputting the selection of the paper feeding means. Therefore, if there is only one original set, the cover forming mode is automatically canceled even when the operator is not aware that the cover forming mode is set, so it is possible to accidentally form an image on the cover transfer paper. can be prevented. Further, when the cover forming mode is canceled, the operator waits for the selection input of the paper feeding means, so that the operator can freely select the paper according to his/her wishes as in the case of normal image formation.

Other objects and features of the invention will become apparent from the following description of embodiments with reference to the drawings.

〔Example〕

A copying machine embodying the present invention includes a copying machine body 100 shown in FIG. Automatic document feeder/discharge device (hereinafter referred to as RDH) mounted on the top of the copying machine body +00 as shown in Figure 3
200. 4, and a sorter 300 installed on the transfer paper ejection side of the copying machine main body +00.

First, the main body of the copying machine shown in FIG. 1 will be explained. The main body 100 of the copying machine is an electrostatic transfer type copying device that fixes originals.
Optical system 1101 Image forming system 120. Paper feed system +30, and
It consists of a paper refeed system 140 and the like.

The optical system 110 includes a contact crow II+ and an exposure lamp 112 . 1st mirror ++3A
.

Second mirror 113B, third mirror 113C, fourth mirror 113D, fifth mirror 113E, sixth mirror 113F,
Consists of a lens 114, dustproof glass 115, etc.
The image forming system +20 includes a photoreceptor drum +21 and a charger 122 disposed around the photoreceptor drum +21. Erasa! 23. Developing device 124° Pre-transfer charger I269 Separation charger 1
279 separation claw 128. Static neutralization charger before cleaning (
(hereinafter referred to as a PCC) 129, a cleaner +2A, a conveyor belt 128 disposed downstream of the photosensitive drum +21, a fixing device +2C, and the like.

The paper feed system 130 has five stages, including a manual paper feed tray 131. 131 people on the first paper feed tray, 1318 people on the second paper feed tray. 3rd paper feed stand + 3I
C.

Call rollers 132A, 132B, 132c, +3 provided on the fourth paper feed tray 131D and each paper feed tray (however, the manual feed tray +31 is shared with the first paper feed tray +31A)
2D, paper feed roller 133^, 133B, 133C, 1
33D, and reverse roller 134A.

134B, 134C, 134D, and registration rollers 135° guide mylar 136 and various guides and intermediate rollers.

The paper refeeding system 140 has a switching claw 141. Approaching/separating roller 142° Reversing guy 11439 Reversing roller 144. Gate claw 145
．． Intermediate tray 146. Tip side section 147. Vapor stopper I48. Call Koro 149. It consists of a paper feed roller 14A, a reverse rotation roller 14B, a paper discharge roller 14C, and the like.

When a document is set on the contact glass III and a start instruction is given, the paper feed clutch is turned on and the call roller of the paper feed table selected at that time feeds the recording paper to the paper feed roller. The paper feed roller feeds the recording paper toward the registration rollers 135.

During this time, the optical system +10 scans the document on the contact glass III, and the light reflected from the document illuminated by the exposure lamp 112 is reflected by the first mirror +13A, the second mirror 113B, and the third mirror.
Mirror 113C lens 114. 4th Milani 1130. The light is guided to the photosensitive surface of the photosensitive drum 121 via the fifth mirror ++3E, the sixth mirror 113F, and the dustproof glass 115.

The photoreceptor drum 12+ is rotating clockwise in the figure.
The photosensitive surface is uniformly charged by a charger +22 before receiving the reflected light of the original from the optical system 110, and a latent image area is formed by neutralization by an eraser +23. Therefore, when this latent image area is irradiated with light reflected from the original, photoelectric grooves are generated depending on the intensity of the light, and an electrostatic latent image is formed.

This electrostatic latent image is developed by a developing device 124, and becomes a toner image with toner attached thereto according to the density of the document. This toner image is transferred to the recording paper fed out from the registration roller 135, but in order to facilitate the transfer, PTL
125, electricity is removed before transfer.

The recording paper fed out by the registration roller 135 is brought into close contact with the photosensitive surface of the photosensitive drum +21 by the guide mylar +36, and the toner image is transferred directly above the transfer charger +26. Immediately after 2, the recording paper is separated from the photosensitive surface by the separation charger +27, but if the separation is insufficient at this time, it is forcibly separated by the separation claw 128.

After the recording paper is separated, residual toner is removed from the photosensitive surface of the photosensitive drum 121 by a cleaner 12^, and the recording paper is sent to the fixing device 12C by the conveyor belt 12B.

The fixing device 12C includes a fixing roller 12CI and a pressure roller 12C2, and heats the recording paper onto which the toner image has been transferred while applying pressure (approximately 185° C.) to fix the toner image.

The recording paper on which the toner image has been fixed is delivered to a paper refeed system 140. The paper refeed system +40 guides the recording paper to the paper ejection roller 14C by the action of the switching claw 141 when copying the first side in duplex mode, but guides the recording paper to the reversing guide 143 when copying the first side in duplex mode. Guide.

After this, when the trailing edge of the recording paper passes the switching claw 141.

The switching claw +41 is switched, the contact/separation roller 142 is brought into contact, the recording paper is sent to the reversing roller 1.44, and the reversing roller 14
4 is sent to the gate claw 145.

There are four gate claws 145, and when the gate claws corresponding to the size of the recording paper are opened, the recording paper is ejected to the intermediate tray 146. The recording paper that has fallen onto the intermediate tray +46 is brought together by a leading edge shifting roller 147 until it comes into contact with a paper stopper 148, so that its leading edge is aligned.

stacked.

When copying the second side of the recording sheets stacked on the intermediate tray 146 is started in the duplex mode, the topmost sheet of the recording sheets is sent to the registration rollers 135 by the feeding roller 14^ and the reversing roller 14B by the calling roller 149.

Note that when detecting the toner concentration of the developing device 124, prior to forming a toner image of the document, a toner image of a standard pattern is formed on the front side of the contact glass I11,
A P sensor PSN provided downstream of the developing device 124 detects the density.
Read by.

Figure 2 shows the operation and display board +5 provided in this copying machine.
0 appearance is shown. Each key on this operation & display board 150 will be explained below. Reference numeral 1 is a start key for instructing to start copying, 2 is a numeric keypad for manually inputting the number of copies, etc., 3 is a clear/stop key for instructing to clear the set number and stop copying, and 4 is for indicating the number of copies to be set. 5 is a copy number display that displays the number of copies, 6 is an original number display that displays the number of original sheets, and 7a and 7b are paper sheets that display the size of the copy paper placed in each tray. Among the size indicators, 7a is a paper size indicator for the plain paper feed stage, and 7b is a paper size indicator for the special paper feed stage. In addition, 8 is a paper remaining amount indicator that displays the remaining amount of copy paper set in each tray, and 9 is a paper remaining amount indicator that displays the remaining amount of copy paper set in each tray.
The automatic paper selection mode display shows that the mode for selecting the most suitable copy paper (automatic paper selection mode) is selected, 10 is the paper key for selecting the copy paper, and 11 is the copy paper size. A paper size selection indicator shows which paper size has been selected; 12 is a please wait indicator which shows that the copying machine is preparing; 13 is a copy ready indicator which shows that the copying machine is ready; 14 is a sort key for displaying the sort mode, 15
16 is a stack key for instructing the stack mode; 17 is a stack mode indicator for indicating that the stack key is set; 20 is a stack mode indicator for indicating that the stack mode is set; Stable key for instructing table binding mode; 21 is a stable mode indicator that indicates that stable binding mode is set; 22 is for making one double-sided copy from two single-sided originals. a single-sided/duplex mode key 23 for indicating that the single-sided/duplex mode is set;
24 is a duplex single-sided mode key that instructs to make two single-sided copies from one double-sided original, 25 is a duplex single-sided mode indicator that indicates that duplex single-sided mode is set, and 26 is a double-sided copy of one double-sided original. A duplex duplex mode key 27 is used to instruct to make a double-sided copy of one sheet of a document, a duplex duplex mode indicator 27 is used to indicate that the duplex mode is set, and 28 is a duplex mode indicator 28 for feeding special paper for predetermined copying. A cover mode key 29a indicates that a front cover mode is set to feed special paper for the first original, and 29b a front cover mode indicator for feeding special paper for the first and last originals. A front and back cover mode indicator indicates that the front and back cover mode for feeding paper is set, 30a is a sorter bin paper forgotten indicator that warns that copy paper remains in the sorter bin of the ivy 300 (described later), and 30b is a display in the sorter. 30c is a jam indicator that warns of a jam inside the copying machine, 31 is a paper replenishment indicator that warns that the selected copy paper is out, and 32 is a stable 33 is a stable replenishment indicator that warns that there is no needle (needle), 33 is a stabilization impossible indicator that warns that stabilization is not possible, and 34 is a cover mode warning display that warns when cover mode is not accepted. 35 is an LCD display for displaying operational guidance, confirmation/warning guidance, etc.

FIG. 3 shows a cross section of the RDH 200. The RDH 200 will be explained with reference to this figure.

RDH200 is a type of automatic document feeder and ejector that automatically feeds the document onto Contact Glass III before starting optical scanning and ejects it after optical scanning. ) by re-centing the same original and making it possible to repeatedly eject the same original, thereby facilitating copying of a single-sided original or re-copying in the event of a misfeed.

This device includes a document placing table 21O1, a document feeding system 220°, a document re-centing system 230. and an inversion system 240.

A recycle lever drive motor 2 is mounted on the original table 210.
11. A recycle lever 212 coupled to the shaft and a sensor 21 that detects the rotation of the recycle lever 212
It is equipped with 3. When a document is set and copy start is instructed, the motor 211 moves to the recycle lever 212.
Rotate and place it on top of the final document. Thereafter, when the last original is fed and the lever 212 rotates due to its own weight, and the leading edge of the original falls from the notch formed in the original mounting table 210, the sensor 213 detects the lever 212 just before that.

In other words, the sensor 213 detects one cycle of a series of originals placed at the beginning. Also, when the number of original feeding/ejection cycles is two or more, the sensor 213 detects one cycle of a series of originals placed on the original. Detect each cycle by placing lever 2+2 on the

The feeding system 220 includes half-moon rollers 221. Feed belt 222
゜Separation belt 223. Conveyance roller 224. Conveyor belt 2
25 and presser roller 226. and document sensor 227
．． Paper feed sensor 228 and paper feed registration sensor 229
Equipped with etc.

When the document sensor 227 detects a document, a feed-in signal is sent from the main body +00 at a predetermined timing. This starts the document feeding operation, and first, the half-moon roller 221 separates the document. Since a plurality of these documents may overlap, only the lowest document is sent to the conveyance roller 224 by the action of the feed belt 222 and separation belt 223.

Conveyance roller 224 passes this document to conveyance belt 225, which further conveys it. At this time, when the registration sensor 229 detects the trailing edge of the document, a predetermined stop timing is set and the feeding of the document is stopped. As a result, the original is positioned on contact glass III. Note that the document size can be detected based on the detection timing of the registration sensor. Further, the paper feed sensor 228 detects misfeed.

The resetting system 230 includes a direction changing plate 231. Ejection roller 232
233 and 234, etc.

Re-centing is performed upon completion of optical scanning, and the direction change plate 23
After selecting the discharge guide 235 by 1, the conveyor belt 2
Reverse 25. As a result, the original is ejected to the last (top) position of the original on the original placing table.

The reversing system 240 includes a switchback roller 2411, a reversing sensor 2429, a reversing registration sensor 243, and a part of the original feeding system 220 and the original resetting system 230.

Here, in ejecting by the document resetting system 230,
A reversal sensor 242 detects the time when the trailing edge of the document passes the discharge guide 235, and the document is guided to the switch bank roller 241 by reversing the discharge rollers 232, 233, and 234. The switchback roller 241 first guides the document to a reversing guide 244 , then reverses it and guides it to a reversing paper feed guide 245 . At this time, the direction change plate 231
selects the reversing paper feed guide 245 and sends the document to the conveyor belt 225. Note that the timing of stopping the document in this case is determined by detection by the reversal registration sensor 243.

The above document feeding system 220. The operation of the original resetting system 230 and the reversing system 240 allows the original to be fed normally and ejected normally (normal feed, normal ejection mode), and the original reversed, fed, and ejected as is (reverse feeding, normal ejection mode). "Normal feed/counter-discharge mode" in which the document is fed normally, reversed and ejected, "Reverse feed/counter-discharge mode" in which the document is reversed, fed, reversed and then discharged
, an "inversion mode" in which only inversion is performed becomes possible.

The RDH 200 also has a "document return mode" for returning the document. This is a mote that returns to the previous original when a copy cannot be made due to a jam or the like or when a defective copy occurs for some reason. Here, the number of originals that have been copied is counted, so the originals are fed and ejected until the cycle ends, and then the originals are fed and ejected repeatedly for the number of sheets subtracted from the count value. Place the original. In this case, after one round, the number of returned sheets may be larger than the count value, but the subtraction is done modulo the total number of original sheets. Further, in this embodiment, the number of returned sheets is limited to seven.

FIG. 4 shows an outline of the mechanism of the sorter 300. Copy machine +0
An entrance guide plate 313 is provided as an entrance for receiving the transfer paper discharged to the outside of the 0, followed by an upper and lower conveyor belt 314° 312 for conveying the transfer paper upward, and a switching claw 31.
6. Switching guide plates 315 and 317 are provided. Furthermore, a pair of paper ejection rollers 3 is provided in the upper path by the switching claw 316.
111.319 and a paper ejection tray 323 are provided, and the lower path by the switching claw 316 is for copying along the insertion side of a bin containing a plurality of sheets (20 sheets in this embodiment) provided vertically parallel to the bottom. It continues to the longitudinal conveyors 321 and 322.

The vertical feed conveyors 321 and 322 are equipped with discharge rollers and deflection claws corresponding to each bin, and can feed the transfer paper to any bin. Note that the drive motor 311 is for driving each roller within the sorter 300.

Next, the operation of the sorter 300 will be explained. First, the transfer paper discharged from the copying machine is inserted through the entrance guide plate 313, is held between the pair of conveyor belts 312 and 314, and is conveyed to the upper part.

Now, assuming that the normal paper ejection mode (a mode in which paper is ejected to the paper ejection tray 323), the switching claw 316 is lowered, and the transfer paper is moved along the switching guide plate 317 to the paper ejection roller pair 31.
11.319, the paper is discharged to the paper discharge tray 323. Note that a discharge sensor 341 is provided to detect that the transfer paper has been discharged.

Also, now, sort mode (mode to sort into pages)
In the stack mode (a mode in which pages are sorted by page), the switching claw 136 is raised and the paper is conveyed downward along the switching guide plate 316. Vertical feed carrier 32
1. The transfer paper is conveyed to any bin that matches the mode (sort or stack) by the action of the 322 discharge roller and deflection claw. Note that an LED 342 and a phototransistor 343 are used to detect that the transfer paper is ejected.
A transmission-type optical detection sensor based on the LED 344 and a phototransistor 345 is located on the bottom bin (11th-20th bin) side. , respectively.

When in the sort mode, the deflection claw of the first bin of the vertical feed conveyor 321 is activated to output the second copy to the first bin 324, and the second copy of the first page is produced by the deflection claw of the second bin activated. In the second bin (the bin immediately below the first bin), also the first page of the second page.
The first sheet is discharged into the first bin, and the second sheet is discharged into the second bin. In this way, in the sort mode, pages are outputted in one bin, 1, 2, 3, . . . .

When in stack mode, all copies of the first page are
The deflection claw of the vertical feed conveyor 321 is operated so as to discharge the copy of the second page into the second bin. In this way, when in stack mode, identical vane copies are ejected into one bin and sorted by vane.

In this embodiment, the post-processing unit 332 has a function of performing post-processing (stable processing) on the sorted copies. The bundle of transfer paper that has been transferred is transported in an arbitrary bin to a post-processing unit 332 by a chuck unit 331, subjected to stable processing by 332, and returned to its original position after the processing has been performed. Note that the selection of each bin to be stabilized is performed by the post-processing unit 33.
2. This is done by moving the chuck unit 33 up and down.

By the way, the paper feed tray 131B of this example is equipped with a sensor for detecting the transfer paper size.

FIG. 5 shows a cross section of the paper feed tray 131B, and will be described. There are 50 guide lots in the paper feed tray HIB.
1, a vapor guide 502 is provided to be slidable in the longitudinal direction of the transfer paper 500 (or in a direction perpendicular to the longitudinal direction). Size detection sensors 504 and 505 are respectively provided to detect the position of the filler 503 to detect the size of the transfer paper. In addition, paper feed tray 131^, +3
IC and +31D have a similar configuration and can detect the size of the transfer paper.

The components described above are controlled by an electrical control system shown in FIG. This electrical control system includes a main control section 400
Storage unit 41O9 optical control unit 420°AC control unit 430. Operation control unit 440. It consists of an RDH control section 450, a sorter control section 460, and the like.

The main control unit 400 monitors various sensors 420 provided in each part of the main body 100 and controls loads such as solenoids and motes in each part.

The optical control unit 420 controls the lens motor that drives the lens +14 and the scanner motor that performs optical scanning, and the AC control unit 430 controls the exposure lamp 112 and the fixing device 12.
C heater, main motor, developing motor.

Controls AC loads such as the transport motor and paper feed motor.

The operation control unit 440 is an operation & display board! 50 key operations for reading and display control.

The RDH control section 450 controls the RDH 200, and the sorter control section 460 controls the sorter 300.

FIG. 7 shows the control operation of the main control section 400.

First, input the number of cents (subroutine 1:
Below, in parentheses, the words "subroutine" and "step" are omitted, and only the numbers assigned to them are written.)

Next, perform cover mode setting processing (2), and RD
The document sensor 227 detects whether a document is set in H200.
When seven originals have been placed, the process waits until the start key 1 is pressed and performs processing to detect the number of originals set (3-5).

Check whether the 1-sheet original set flag is set (6), and if so, perform the paper feed stage selection process, and proceed to step 9 by pressing the start key 1 (7, 1).
1). If the original set number 1 flag is not set, the process directly proceeds to step 9.

Initial settings are performed in step 9, and then original paper supply processing is performed (10), and the copy sheet number counter and the discharged sheet number counter are cleared (I1).

Transfer paper is fed according to the method selected in the process of step 2.7, and a copying operation is performed (12, 1
3). Note that the copying operation realizes the copying process described with reference to FIG.

When the copying operation is completed, the transfer paper is ejected (14).
).

Paper feed operation (+2) until the number of copies reaches the set number
, copying operation (+3), and paper ejection operation (14) are repeated 1
5) When the number of copies reaches the number of cents, the original is ejected (16).

Repeat steps 10 to 16 for each document until the final document is ejected. 7) When the final document is ejected (18), turn off the transport drive motor.
, execute post-processing (stable processing) and end (19
．． 20).

Each step 1, 2, 5, 7.9, 10°12. in Fig. 7.
The contents of routines 14 and 20 are shown in FIGS. 8a, 8b, 8c, and 8d, respectively.

Figures 8e, 8f, 8g, 8h, and 8
1. Figure 8a shows the contents of the set sheet number input process (1).

Here, when the numeric keypad 2 is pressed on the operation & display board 150, the pressed numeric keypad data is stored in the storage unit 430.
(RAM). Further, the set number display 4 is lit according to the entered RAM data, and the process returns (AI-A3).

FIG. 8b shows the contents of the cover mode set (2).

When the cover key 28 is pressed on the operation & display board +50 (81), it is checked whether it is currently in the front cover mode (B2), and if it is in the front cover mode, the front cover mode flag is reset, and the front cover mode is set.

Set the flags for sort mode, stable mode, and first mode, and return (B3-8
6. B12).

If it is not the front cover mode, check whether it is currently the front and back cover mode (B7). If it is not the front and back cover mode, reset the front and back cover mode flag, Set each flag (8g-B+2).

If it is front and back cover mode, reset the flags for front cover mode, front and back cover mode, sort mode, stable mode, and first mode, and return (
BI3-B+7). That is, each time the cover key 28 is pressed, the mode sequentially changes from front cover mode to front and back cover mode to no moto setting. Further, if the front cover mode or the front and back cover mode is selected, the first mode flag is set, and the first mode flag is reset without setting the mode.

FIG. 8c shows the contents of the document set number detection process (5). In this process, first, it is checked whether the first mode flag is set (cl), and if it is not set, the process returns.

If the first mode flag is set, RDH200
The value of the original set number counter for counting the number of originals set in is cleared (cl).

When there is a document in the RDH200, the value of the document set number counter is incremented by 1, and one document is ejected (C3-
C5). Steps C3 to C5 are repeated until there are no originals left, and when there are no more originals, the number of originals is displayed on the original number display 6 on the operation boat (C6).

Check the value of the original cents counter (C6), and if the value of 2 is 1, the front cover mode, front cover mode, front cover mode,
The sort mode, staple mode, and first mode flags are set, the number of originals is set to 1, and the process returns (08-C13). On the other hand, if the value of the document gutter counter is not 1, the first mode flag is reset and the process returns (C7, C13).

FIG. 8d shows the content of the paper feed control process (7).

Here, first, we wait for the paper key 10 to be pressed (dl), and then reset the 1 document count flag (dl).
).

After that, check whether the paper feed tray to which the special paper is to be fed is selected (d3), and if it is not selected, turn on the paper size selection display 7a of the plain paper feed tray, and then Turn off the paper size selection display 7b for the column (
d4. C15), return.

On the other hand, when the paper feed tray for feeding special paper is selected, the paper size selection display 7a of the plain paper feed tray is set to O.
FF, turn on the paper size selection display 7b of the special paper feed stage (d6, d7), and return.

FIG. 8e shows the contents of the initial setting process (9).

First, the document sheet number counter is cleared and the conveyance sheet number motor is turned on (el, C2). After that, check whether it is in sort mode (C3). If it is in sort mode, raise the switching claw 316 in the sorter 300 so that the transfer paper is conveyed to the bin side (C4), and if it is not in sort mode, switch Lower the claw 316 so that the transfer paper is discharged to the paper discharge tray (C5), and return.

FIG. 8f shows the contents of the RDH200 document feeding process (10). Here, a document feed signal is output to the RDH 200 to feed the document, the value of the document counter is incremented by 1, and the process returns ([1, f2).

FIG. 8g shows the content of the paper feed control process (12).

In the second process, first check whether the fed document is the first page (gl), and if it is the first page, check whether it is in front cover mode or back cover mode (g2).
．． g3), if either is the case, feed special paper (g3).
4), Return. On the other hand, if neither is the case, plain paper is fed (g5) and the process returns. .

If it is not the first page in step g1, check whether the fed document is the last page g6)
, If it is not the last page, feed plain paper (g9),
Return. On the other hand, if the document is in the final vane, check whether it is in the front and back cover mode (g7), if it is in the front and back cover mode, feed special paper (g8), and if it is not in the front or back cover mode, feed plain paper (h9). ), return.

In other words, in front cover mode or front and back cover mode, transfer paper (special paper) is fed from tray 4 for the first original, first original, and last original, and for other originals, the transfer paper (special paper) is fed from tray 4. Transfer paper (four sheets) is fed from a tray (one of 1 to 3) containing transfer paper of the same size and direction as the transfer paper.

FIG. 8h shows the content of the paper discharge control process (14).

First, check whether it is in sort mode (hl), and if it is not in sort mode, when the paper discharge sensor of the paper discharge tray turns on, the value of the paper discharge counter is incremented by 1 and the process returns (h7, h8).

If the mode is in sort mode, when the bin output sensor is turned on, the value of the paper output counter is incremented by 1, the current bin deflection claw is turned off for the primary stacking operation, and the current bin one bin below is incremented by 1. Turn on the bottle deflection claw (h2 to h4). After that, it returns if the set number of sheets and the number of discharged sheets are not equal, and if the number of cent sheets and the number of discharged sheets are equal, the current bin deflection claw is turned off for the next operation, and the bin deflection claw of the first bin of the block is turned off. Turn on and return (h5.h6).

FIG. 81 shows the contents of post-processing (20). In this post-processing, it is checked whether the stapling mode is set, and if so, stapling processing is performed (i l, i2)
. This stable processing is the same as already known stable processing, so the details will be omitted.

As described above, in this embodiment, when the front cover mode or the front and back cover mode is set, the number of set originals is automatically detected, and if the detected number of originals is one, the cover mode is canceled.

Further, at this time, it is possible to select a paper feed tray by inputting a selection.

〔Effect of the invention〕

As described above, according to the present invention, the control means (400)
When the cover forming mode is instructed, the counting means (200,
When the count value of step 400) is 1, the cover forming mode is canceled and the selection instruction input means (10) waits for an input.

That is, when the cover forming mode is set, if the number of originals set is one, the cover forming mode is automatically canceled and the apparatus waits for inputting the selection of the paper feeding means. Therefore, if there is only one original sent, the cover formation mode is automatically canceled even when the operator does not realize that the cover formation mode is set, so it is possible to accidentally form an image on the cover transfer paper. can be prevented. Further, when the cover forming mode is released, the operator waits for the selection input of the paper feeding means, so that the operator can freely select the paper according to his/her wishes as in the case of normal image formation.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the configuration of the main body 100 of the copying apparatus, and FIG. 2 is a sectional view showing the operation and display board +
50 is a plan view showing the appearance of the device 50. FIG. 3 is a sectional view showing the configuration of an automatic document feeder 200 mounted on the upper part of the copying machine main body 100. FIG. 4 is a sectional view showing the configuration of a sorter 300 installed on the transfer paper discharge side of the copying machine main body 100. FIG. 5 is a sectional view showing a schematic configuration of the paper feed tray. FIG. 6 is a block diagram showing the electrical control system of the copying machine shown in FIG. 1. 7, 8a, 8b, 8c, 8d, 8e, 8f, 8g, and 8h. and FIG. 81 shows the main control section 400 shown in FIG.
3 is a flowchart showing the operation of FIG. 100, copying machine body +10 optical system I201 imaging system (+10.+2
0: Image forming means) 130, Paper feeding system 1318-1310.1328-132D, 133A
-133D, 134A-+34D paper feed tray (recording medium supply means) +40 Paper refeed system 150゛Operation & display board 10: Paper key (selection instruction input means) 28 Cover key (instruction input means) 200: Automatic document feeder 210 Original placing table 220: Original feeding system 230: Original re-sorting system 300° sorter 400 Main control unit (paper feeding control means, control means) (20
0,400: counting means) 410° storage section 420 optical control section AC control section operation control section RD H control section

Claims (1)

[Scope of Claims] An instruction input means for inputting instructions for a cover formation mode, an image forming means, and a plurality of recording media for selectively supplying a cover recording medium and a saddle stitching recording medium to the image forming means. When an instruction is input for the supply means and the cover forming mode, one of the recording medium supply means supplies the cover recording medium to the image forming means for at least one of the first image and the last image to be formed, and the other one supplies the recording medium for the cover to the image forming means. In an image forming apparatus, the image forming apparatus includes a sheet feeding control means for supplying a saddle stitching recording medium to the image forming means using another recording medium supplying means, a counting means for counting the number of original sheets; supplying the recording medium at the time of image formation. selection instruction input means for inputting a selection instruction for selecting a recording medium supply means; and, when the cover formation mode is instructed and the count value of the counting means is 1, the cover formation mode is canceled and the selection instruction input means An image forming apparatus comprising: control means for waiting for an input.