JP2897233B2 - Document feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for reading an original and recording the original on a copy sheet, and more particularly to an original supply apparatus for supplying the original from a tray to a platen. The present invention relates to a document supply device capable of appropriately controlling document supply according to a state and a document supply mode.

[Conventional technology]

2. Description of the Related Art In recent years, recording apparatuses such as copying machines have made full use of advanced control technology and data processing technology with the introduction of computers, and available functions have been diversified. In the operation for reading a document, in addition to manually placing the document on the platen, using the document feeder, the one-sided automatic document feeder (ADF: Auto Document Feeder) mode reverses the document supplied to the platen, Double-sided automatic document feeder (DADF: Duplex Auto Document Feeder) mode that automatically reads images on the front and back of a document Semi-automatic Document Feeder (SADF: Semi-Auto Document Feeder) mode that automatically feeds documents set in the bypass tray to the platen Large Document Automatic Feeding (LDC) mode in which originals are fed from the manual feed tray Parallel Document Automatic Feeding (2-UP) mode in which two originals are sent in parallel from the manual feed tray simultaneously (2-UP) mode Various document supply modes such as the form feeder (CFF) mode Can be selected and used.

Among these document supply modes, the 2-UP mode in which documents are set in parallel on a tray has a more complicated supply control than other document supply modes, and causes various inconveniences. For example, since the 2-UP mode is based on the principle that two originals are simultaneously supplied, if the number of the originals is odd, the original is set on only one side of the tray, and the 2-UP cannot be applied. For this reason, it is necessary to release the 2-UP mode, select another document supply mode and copy one side of the document, and the operation for this is complicated. on the other hand,
It is conceivable that such a one-sided document can be supplied even in the 2-UP mode, but in this case, the other side on which the document is not set is simultaneously read and recorded, so that it is unnecessary for the other side of the copy paper. An image or the like is transferred, and the appearance deteriorates.
In the 2-UP mode, it is necessary to control the document supply in accordance with the positioning of the two documents on the tray and the setting state thereof. However, this control is complicated, and the optical system, the transfer system, and the copy paper conveyance Synchronization adjustment with other mechanisms of the recording apparatus such as a system is also complicated.

[Problems to be solved by the invention]

In the document supply apparatus of the recording apparatus capable of performing various document supply modes as described above, it is particularly difficult to manage and control the 2-UP mode for performing the parallel document feed.

In particular, according to the conventional document feeder, if the detection of the document supplied in the 2-UP mode and the detection of the document size are performed by separate sensors, the number of sensors increases and the design for arranging the sensors increases. Positional constraints arise. Further, when at least one of the originals supplied in the 2-PU mode is detected, the original is supplied onto the platen, so that there is a possibility that the two originals may be copied with their leading edges being irregular. . Furthermore, when the sensor detects a document, the supply roll supplies the document to the registration gate, and there is a possibility that the document is supplied redundantly.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a document feeder that reduces the number of sensors, reduces positional restrictions on the arrangement of sensors, prevents irregularities in the leading ends of two documents, and prevents overlapping of document feeds. .

[Means for solving the problem]

In order to achieve the above object, the present invention provides a document supply apparatus having a document supply mode for simultaneously supplying a plurality of documents set in parallel on a document tray onto a platen, wherein one of the plurality of documents is First and second documents provided in a first passage area of the document tray passing therethrough and arranged in the direction of passage of the one document with an interval smaller than the size of the one document in the passage direction. A detection sensor, provided in a second passage area of the document tray adjacent to the first passage area and through which the other documents in the plurality of documents are juxtaposed to and pass through the first document; Third and fourth document detection sensors arranged at a distance smaller than the size of the other document in the direction of passage of the other document, and detection signals of the first to fourth document detection sensors Said one based on And control means for controlling supply of another document to the platen, wherein one of the third and fourth document detection sensors outputs a size signal in addition to a document presence / absence signal. The other document detection sensors in the third and fourth document detection sensors are arranged at the same position as one document detection sensor in the first and second document detection sensors. Means for setting the one and other documents in the first and second passage areas of the document tray from detection signals of the first to fourth document detection sensors; And a total size of the one and other originals is determined from the size signal of the one original detection sensor.

According to another aspect of the present invention, there is provided a document supply apparatus having a document supply mode for simultaneously supplying a plurality of documents set in parallel on a document tray onto a platen, wherein one of the plurality of documents is provided. A first and a second, which are provided in a first passage area of the document tray through which a document passes, and which are arranged in the passage direction of the one document with an interval smaller than the size of the one document passage direction. A document detection sensor, provided in a second passage area of the tray adjacent to the first passage area and through which the other documents in the plurality of documents are juxtaposed to and pass through the first document; A third and a fourth document detection sensor arranged at an interval smaller than the size of the other document in the direction of passage of the other document, and between the first and second document detection sensors; And the third and A roll which is disposed between the document detection sensors of No. 4 and which nips the one and other documents and supplies the nip to the platen side; A gate for positioning the original, and a detection signal from the first to fourth original detection sensors are supplied, and the one or other original is set in the first or second passage area of the original tray. When releasing the nip of the roll and closing the gate,
When the one and the other originals are positioned, the original supply device is provided with control means for causing the roll to nip the one and the other originals and opening the gate.

Further, in order to achieve the above object, the present invention provides a document supply apparatus having a document mode in which a plurality of documents set in parallel on a document tray are simultaneously supplied on a platen. A plurality of detecting means for detecting, a plurality of document conveying means for conveying the plurality of documents from the document tray to a document reading platen, and discharging the document from the platen to a discharge portion; and a method for conveying the plurality of documents to the platen. Positioning means for positioning the plurality of originals at predetermined positions; and a plurality of originals which light up until the plurality of originals leave the positioning means and are conveyed to the platen, thereby prohibiting manual feeding of the next original. And at least one of the plurality of detecting means detects at least one of the plurality of originals. Means for positioning at least one of the plurality of documents at the predetermined position, and then causing the document transport means to transport at least one of the plurality of documents to the platen and causing the image forming means to read the document. And control means for turning on at least one of the plurality of display means and for turning off at least one of the plurality of display means being turned on when at least one of the plurality of documents is conveyed to the platen. The control unit includes at least one of the plurality of detection units.
When one of the plurality of display means does not detect a document on the document tray, the image forming means deletes a record of a portion corresponding to the document which has not been detected, and at least one of the plurality of display means corresponding to the document which has not been detected. A document supply device having a configuration in which one of them is not turned on;

〔Example〕

FIG. 1 is a block diagram showing a document feeder of the present invention. The document supply device is incorporated in an INPUT subsystem 37 (see FIG. 3) described later, and includes a plurality of detection means.
37-1n, a determination unit 37-2 to which signals from these sensors are input, and a control unit 37-3 for performing control based on information from the determination unit 37-2. And a drive unit 37-4 whose document supply operation is controlled by the control unit 37-3. The sensors 37-1a, 37-1b,..., 37-1n are arranged on a tray on which a document is set, and detect the presence / absence and position of the document on the tray. In particular, this embodiment includes a sensor for detecting the parallel setting of two originals on the tray and a sensor for detecting the leading end of each of the parallel-set originals. The judging section 37-2 comprises these sensors 37-1a, 37
-1b,..., 37-1n are input, the position and state of the original on the tray are detected based on the input signals, and output to the control unit 37-3. Further, a signal from the drive unit 37-4 is fed back to the determination unit 37-2 and output to the control unit 37-3 together with a signal from the sensor. Drive unit 37
Reference numeral -4 denotes a series of operations for setting a document on a tray and supplying a document to a platen. The driving unit 37-4 includes a motor such as a servomotor driven to supply a document from the tray to the platen and discharge the document from the platen, and a positioning member for positioning the document supplied to the platen. It is. In this case, the motor can be configured to directly or indirectly drive a supply member such as a roll or an endless belt for supplying the document, while the positioning member stops the leading end of the document at the registration position or moves the platen from the registration position to the platen. It includes a register roll to be supplied, a register gate, and a skew roll for performing skew correction of a document. The drive signals of these motors and positioning members are output to the determination unit 37-2 and used as one of the control data. The control unit 37-3 controls the driving unit 37-4 by outputting a driving signal relating to document supply based on the data and position data relating to the document from the determination unit 37-2 and the feedback data from the driving unit 37-2. Although the control of the control unit 37-3 will be described in detail later, it is omitted, but the control is particularly performed for the parallel setting of the originals on the tray.

The above-mentioned INPUT subsystem 37 is connected to a sequence manager (SQMGR) 32 for monitoring the operation of the entire recording apparatus, and performs mutual communication with the SQMGR 32 to maintain synchronization with other systems of the recording apparatus. Controls document supply. Reference numeral 36 denotes a user interface for setting the original supply mode such as the SADF mode, the 2-UP mode, the LDF mode, and the ADF mode, setting the copy magnification such as the same size / enlargement / reduction, and setting the number of copies. The information is input to the INPUT subsystem 37 via the SQMGR 32. 40 is an IEL subsystem,
The formation of the electrostatic latent image of the read document image on the photoconductor is controlled. This IEL subsystem 40 is connected to the SQMGR 32 and communicates with the SQMGR 32.
Image formation on the photoconductor is controlled by inputting a signal from the INPUT subsystem 37.

FIG. 2 is a diagram showing an example of the overall configuration of a copying machine to which the document supply device of the present invention is applied. The copying machine to which the present invention is applied can be equipped with some additional devices to the base machine 1. The base machine 1, which is a basic configuration, has a platen glass 2 on which an original is placed. Are arranged, and the respective devices of the optical system 3 and the marking system 5 are arranged below it. On the other hand, an upper tray 6-1, a middle tray 6-2, and a lower tray 6-3 are attached to the base machine 1, and all of these paper feed trays can be pulled out to the front, improving operability. In addition to saving the layout space of the copying machine, a copying machine having a clean design that does not protrude from the base machine 1 is realized. In addition, inverters 9 and 10 and a duplex tray 11 are arranged in a paper transport system 7 for transporting the paper in the paper feed tray. Further, on the base machine 1, a user interface 12 composed of a CRT T display is mounted, and a platen glass 2 is mounted.
A document feeder (here, a duplex auto document feeder: hereinafter, referred to as DADF) 13 is mounted on the document feeder. The supply side of the paper transport system 7 includes an MSI
(Multi sheet inserter: manual feed tray) 16 and HC
An F (high capacity feeder: large capacity tray) 17 can be attached, and one or a plurality of sorters 19 can be arranged on the discharge side of the paper transport system 7.

FIG. 3 is a diagram showing a configuration of a subsystem of a copying machine to which the present invention is applied, and FIG. 4 is a diagram showing a hardware configuration by a CPU. As shown in FIG. 3, the copying machine system to which the present invention is applied includes four subsystems including a SQMGR subsystem 32, a CHM subsystem 33, an IMM subsystem 34, and a marking subsystem 35 on a main board 31, U / I subsystem 36, INPUT subsystem (document feeder control system) 37, OUTPUT subsystem 38,
It is composed of nine subsystems including an OPT subsystem 39 and an IEL subsystem 40. In contrast to the SQMGR subsystem 32, the CHM subsystem 33 and the IMM subsystem 34 are executed together with the SQMGR subsystem 32 by software under the main CPU 41 shown in FIG. Are connected by an interface (shown by a solid line). However, since the other subsystems are executed by software under a CPU separate from the main CPU 41, they are connected by a serial communication interface (shown by dotted lines).

 Next, these subsystems will be described briefly.

The SQMGR subsystem 32 receives the copy mode setting information from the U / I subsystem 36, and synchronizes the subsystems so that the copy operation can be performed efficiently,
It is a sequence manager that issues work instructions to each subsystem, constantly monitors the status of each subsystem, and performs prompt status determination processing when an abnormality occurs.

The CHM subsystem 33 is a subsystem that controls a paper storage tray, a duplex tray, and a manual feed tray, controls the feed of copy paper, and controls the purge operation of copy paper.

The IMM subsystem 34 is divided into panels on the photosensitive belt,
It is a subsystem that controls the running / stop of the photosensitive material belt, the control of the main motor, and other controls around the photosensitive material belt.

The marking subsystem 35 is a subsystem that controls the potential of the corotron, the exposure lamp, the developing machine, the potential of the photosensitive material belt, and the toner density.

The U / I subsystem 36 is a subsystem that performs all control of the user interface, display of machine status, job management such as determination of a copy mode, and job recovery. .

The INPUT subsystem 37 is a control system of the document feeder with the feed control switching function of the present invention, and includes automatic document feed (DADF), semi-automatic document feed (SADF), and large size (A2) document feed (LDC). It controls the feed of computer form originals (CFF), controls automatic feeding of two originals (2-UP), detects the size of originals, and performs a control of the control unit 04 in the feed control switching function. is there.

The OUTPUT subsystem 38 is a subsystem that controls a sorter and a finisher, outputs copies in sorting, stacking, and non-sorting modes, and performs binding output.

The OPT subsystem 39 is a subsystem that controls scanning, lens movement, shutter, and PIS / NON-PIS when exposing a document, and moves the carriage in the LDC mode.

The IEL subsystem 40 is a subsystem that erases unnecessary images on the photosensitive material belt, erases the leading and trailing edges of the images, and erases images according to the edit mode.

The above-described system is configured with seven CPUs shown in FIG. 4 as a core, and can flexibly cope with a combination of the base machine 1 and additional devices surrounding the base machine.
Here, the main CPU 41 is on the main board of the base machine 1 and has the SQMGR subsystem 32, the CHM subsystem 33,
It includes software of the IMM subsystem 34 and is connected to each of the CPUs 42 to 47 via the serial bus 53. These CPUs 42-47
Correspond one-to-one with each subsystem connected by the serial communication interface shown in FIG. Serial communication is performed between the main CPU 41 and each of the other CPUs 42 to 47 according to a predetermined timing with 100 msec as one communication cycle. Therefore, for signals that require strict timing mechanically and cannot be synchronized with the timing of serial communication, an interrupt port (INT terminal signal) is provided in each CPU and interrupts are issued by a hot line separate from the serial bus 53. It is processed. That is, for example, if a copy operation is performed at a process speed of 64 cpm (A4LEF) and 309 mm / sec and the control accuracy of the register is set to ± 1 mm, a job that cannot be processed in the communication cycle of 10 msec as described above occurs. A hotline is required to guarantee the execution of such a job.

Accordingly, in this copier, various types of additional devices can be attached, and software can also adopt a system configuration corresponding to each of these additional devices.

One of the reasons for adopting such a configuration is that if operation control programs for all of these additional devices are prepared in the base machine 1, the memory capacity required for this becomes enormous. become. Further, in the case where new additional devices are developed in the future or the current additional devices are improved, these additional devices can be used without replacing or expanding ROMs (read only memories) in the base machine 1. This is so that they can be used.

For this reason, the base machine 1 has a basic storage area for controlling a basic part of the copying machine and an additional storage area for storing a program taken together with function information composed of an IC card. Various programs such as a control program of the DADF 13 and a control program of the user interface 12 are stored in the additional storage area. When an IC card is set in an IC card device (not shown) in a state where a predetermined additional device is attached to the base machine 1, a program necessary for a copy operation is read through the user interface 12, and is loaded into the additional storage device. It has become so. The loaded program controls the copy operation in cooperation with the program written in the basic storage area or with a priority over the program. The memory used here is a nonvolatile memory composed of a random access memory backed up by a battery. Of course, other storage media such as an IC card, a magnetic card, and a floppy disk can be used as the nonvolatile memory. In this copier, in order to reduce the burden on the operator, the setting of image density and magnification can be preset, and the preset values are stored in a non-volatile memory. ing.

FIG. 5 is a diagram showing the state division of the main system. In this embodiment, the system operation is managed by dividing the main system into a plurality of states. The state division of the main system divides the state after the power ON from the copy operation and the state after the end of the copy operation into several parts, decides the job to be performed in each state, and if all the jobs in each state are not completed, the next This is to ensure the efficiency and accuracy of the control by preventing the transition to the state. Flags are determined for each state, and each subsystem refers to this flag so that the main system Know which state you are in and decide what you need to do. Each subsystem is also divided into states, and a flag is similarly determined corresponding to each state, and the main system refers to the flag and grasps and manages the state of each subsystem.

First, when the power is turned on, the state of the processor is initialized, and it is determined whether the mode is the diagnostic mode or the user mode (copy mode). The diagnostic mode is a mode used by service personnel for repairs and the like, and performs various tests based on the conditions set in NVRAM. In this embodiment, the feed format is set in the diagnostic mode, and the feed mode (feed format) of the NVRAM is changed.

In the initialization state in the user mode, the initialization is performed according to the contents of the NVRAM. For example, the carriage is set at the home position, the lens is set at a position of 100% magnification, and a command for initialization of each subsystem is issued. When the initialization ends, the state transits to standby.

Standby is a state until all subsystems have completed the initial setting and the start button is pressed,
Display "Please wait" on the fully automatic screen. Then, the Colt lamp is turned on and the phaser idles for a predetermined time, and when the phaser reaches the predetermined control temperature, U /
I will display the message "Can be copied" in the message. This standby state is a period of about several tens of seconds at the first power ON.

The setup is a preparatory state of copying in which the start button is pressed and started, and the main motor and the sorter motor are driven to adjust the constants such as the _{VDP of the} photosensitive material belt. Also, the ADF motor is turned on, the first document feed starts, the first document reaches the registration gate, and the document size is detected.
The magnification is determined and the ADF manuscript is laid on the platen. Then, the second document of the ADF is sent out to the registration gate, and the state shifts to cycle-up.

Cycle-up is a state where the belt is divided into several pitches and panel management is performed, and the first panel reaches the get park point. That is, the pitch is determined in accordance with the copy mode, and the optical subsystem is informed of the magnification and the lens is moved. Then, the copy mode is notified to the CHM subsystem and the IMM subsystem,
When the magnification set is recognized, the scan length is determined by the magnification and the paper size, and the optical subsystem is notified. Then, the copy mode is notified to the marking subsystem, and when the start of the marking subsystem is completed, the panel L / E determined by the pitch is checked by the IMM subsystem, and the first copy panel is found, and is set at the get park point. When it reaches, it becomes get park ready and enters the cycle.

The cycle is a copy operation, and the ADC (Automatic D
The copy operation is repeatedly performed while performing ensity control), AE (Automatic Exposure), DDP control, and the like.
When R / L = counted number of sheets, document exchange is performed, and when this is performed for a predetermined number of sheets, a coincidence signal is output and the cycle starts.

Cycle down is a state in which the carriage scan, paper feed, etc. are completed and the copy operation is cleaned up.Each corotron, developing machine, etc. are turned off, and the panel next to the last used panel stops at the stop park position. Panel management to ensure that only specific panels are used and do not cause fatigue.

From this cycle down, it usually returns to standby,
If the platen was copying in mode, press the start key again. In case of restart, return to setup.
If a cycle-down factor such as a jam occurs even from setup and cycle-up, the state transitions to cycle-down.

Purging is a state in which a jam has occurred, and when the cause jam sheet is removed, other sheets are automatically discharged. Normally, when a jam occurs, the state transitions from any state to cycle down → standby → purge. Then, a transition is made to standby or set-up due to the purge end, but if a jam occurs again, a transition to cycle down occurs.

The belt-down occurs when a jam occurs on the tray side from the tacking point. In a state where the belt drive is stopped by releasing the belt clutch, the paper before the belt can be discharged.

The 24V power supply is cut off in a state where the interlock is opened and a dangerous state occurs or a machine clock failure occurs and the control becomes uncontrollable.

Then, when these belt down and hard down factors are removed, the state shifts to standby.

A document feeder with a feed control switching function will be described in detail based on the overall configuration of the copying machine to which the present invention described above is applied.

FIGS. 6A and 6B show a document feeder (DADF) 13 of the present invention, in which a paddle type feed mechanism unit A is attached as a feed mechanism unit.

In FIG. 6A, the DADF 13 is mounted on the platen glass 2 of the base machine 1. This DADF13
Is provided with a document tray 602 on which a document 601 is placed. A delivery paddle 603 is arranged on the document sending side of the document tray 602, whereby the documents 601 are sent out one by one. The sent original 601 is composed of a first drive roll 605, its driven roll 606, and a second drive roll 607.
And the driven roll 608 conveys it to an arcuate conveyance path. Further, the arc-shaped conveyance path 609 joins with the SADF document tray (manual conveyance path) 610 and is connected to the horizontal conveyance path 611, and the exit of the arc-shaped conveyance path 609 is connected to a registration roll 612.
And its driven roll 613 are provided. Cash register roll 612
Is vertically movable by a solenoid (not shown), and is configured to be able to contact and separate from the driven roll 613. The horizontal transfer path 611 is provided with a registration gate 615 that is rotated by a drive motor (not shown). The registration gate 615 stops the leading end of the document when it is closed in order to synchronize the optical system for reading the document with the supply of the document. I do. Meanwhile, cash register roll 612
Is used to switch the movement of the document to the registration gate 615 and to stop the document. The registration roll 612 and the registration gate 615 constitute a positioning member for positioning the document.

In addition, the manual feed tray (manual feed path) 610
A skew roll 627 is provided as shown in FIG. The rotation axis of the skew roll 627 is not parallel to the three-sheet transport direction A in the manual feed tray 610,
It is provided at a fixed angle, and performs skew correction of a document set on the manual feed tray 610 by its rotational drive.

Next, the sensor S ₁ to S ₁₄ which is provided above the conveying path of FIG. 6 (a), will be described with reference to (b). S ₁ document supplied no paper sensor for detecting the presence of a document 601 on the document tray 602, S ₂ from the takeaway sensor, S ₃ the document tray 602 or the manual feed tray 610 for detecting the feeding of the document registration roll 612 detecting a registration sensor for outputting a signal for positioning the document, S ₄ detects a set of the document into the manual feed tray 610-sensor, S ₆ to S ₁₀
Paper size sensor for detecting the size of the document, S ₁₁
Discharge sensor for detecting whether a document has been discharged, S ₁₂
End sensor for detecting the end of the cleaning tape 625, whether the parallel set of originals to S ₁₃ and S ₁₄ are the back side (REAR) and the front side (FRONT) in the provided manual feed tray 610 of the manual feed tray 610 Is a sensor that detects The sensor S _13, S ₁₄ are intended to detect whether the document is in a predetermined position of the tray 610, as shown in FIG. 6 (b), right around the feed direction A of the document (REAR) And from the left side (FRONT), the following sensor S
₁₃ REAR PRE REGI SNR S ₁₃ , sensor S ₁₄ FRONT PRE RE
Described as GI SNR S ₁₄ . The paper size sensor S ₆ to S ₁₀ for detecting the document size is disposed in the spacing that matches the size of the document.

Figure 7 shows the relationship between these paper size sensor S ₆ to S ₁₀ and the size of the document, the sensor S ₆ Short edge feed of document A4 size (A4LEF), S ₇ is a B5 sized document Long edge feed (B5LEF), S ₈ Long edge feed A4-size document (A4LEF), S ₉ Long edge feed of B4-size document (B4LEF), S ₁₀ detects the long edge feed of the A3-size document (A3LEF) It has become. As shown in FIGS. 6 (a) and 6 (b), an LED (light emitting diode) 63 is provided on the side of the arc-shaped conveyance path 609 of the DADF 13.
0, 631 are provided.These LEDs 630 and 631 indicate whether or not a document is set on the manual feed tray 610.The LED 630 indicates that a document is set on the REAR side of the manual feed tray 610. The document set on the front side of the tray 610 is displayed. These LEDs 630 and 631 are turned off when there is no original, and indicate a receivable state of the next original. When the original is set, the LEDs 630 and 631 are turned on to indicate a rejection state of the next original. Therefore, the operator can know the empty state of the tray by seeing whether the LEDs 630 and 631 are on or off. In this case, the lighting of LED630 is REAR PRE REGI SN
This is performed based on the document detection signal of RS ₁₃ , and the lighting of LED 631 is performed based on the document detection of FRONT PRE REGI SNR S ₁₄ .

Fig. 8 shows the components of DADF13 and INPUT subsystem 3 described above.
FIG. 7 is a diagram showing a relationship 7; As illustrated, the sensor S ₁ to S ₁₄
Is input to the INPUT subsystem 37, and is used as a signal for determining whether or not the document conveying operation has been normally completed in a state described later. on the other hand,
Delivery paddle 603, each roll 605,607,612,617,622,626,61
9 and the register 615 are driven by the INPUT subsystem 37.

FIG. 9 is an INPUT subsystem state transition diagram showing state division and state transition of the INPUT subsystem 37. In the present embodiment, the control of the document feeder is used as a control unit, and an INIT state, a STBY state, a Feed-IN state, a REGIST state, an EXPEL state, an EXCHG state, and an INVE state.
The ADF is divided into 11 states of an RT state, a PURGE state, a DIAG state, a FAIL state, and an HD-DWN state, and the 11 states are transited according to predetermined transition conditions (reception signals shown in the drawing). Mode, DADF mode, S
Six types of document supply modes, ADF mode, 2-UP mode, LDC mode, and CFF mode, can be controlled.

 Hereinafter, each state will be described.

INIT state This is the state in which the initial setting of the INPUT subsystem 37 is performed.
The NVM information is transferred, and the INPUT subsystem 37 is initialized based on the information.

STBY state Standby is a state in which the initial setting of the INPUT subsystem 37 has been completed and the DADF 13 can be used. In the STBY state,
Through a no paper sensor S ₁ and sensor S _3, S _4, ADF
The presence / absence of a document placed on the document tray 602 and the SADF document tray 610 is monitored, and if there is a document, that is, the use of the DADF 13 is detected.

Feed-IN State The Feed-IN state is a state in which a document is placed from the ADF document tray 602 or the SADF document tray 610 at a predetermined registration position on the platen. Specific control is performed by a module registered in the state. In this case, since there are two input sections for the original, the following two are selected depending on which input is performed.

For example, when the Feed-IN (ADF) module is executed, one document is laid from the ADF document tray 602 to the position of the registration gate 615. At this time, a check is whether the document has passed the takeaway sensor S _2. Next, the cash register
615 and oblique feed correction of the document by the skew roller 627, detects whether the skew correction of the document has been completed in Purirejisensa S _5, at the same time, detects the size of the document by the paper size sensor S ₆ to S _10. Thereafter, the document is laid on the platen and stopped at a predetermined registration. At this time,
If the next document is present in the ADF document tray 602, the next document is laid down to the position of the registration gate 615, and skew correction is performed.

When executing the Feed-IN (SADF) module, the SADF document tray
When the original input from the 610 is placed on the tray, the original is immediately laid to the position of the registration gate 615 and skew correction is performed. To stop.

REGIST state A document is placed at a predetermined registration position on the platen, and a copy operation is possible. In the REGIST state, the INPUT subsystem 37 is in a state (standby state) of waiting for another subsystem to perform a predetermined operation and finish scanning the document.

EXGHG state Discharges the original on the platen after scanning, and conveys the next original to a predetermined registration position on the platen.

 EXPEL state Ejects the original on the platen after scanning.

INVERT state The document on the platen for which scanning has been completed is inverted via the inversion path.

PURGE state A jam has occurred in another system.
Transition is made by receiving a PURGE REQWEST signal from the sequence manager 32, and original document purge control is performed.

HD-DWN state When a document jam occurs or the interlock is opened, 24
V When power supply cutoff is received, when communication failure occurs, servo motor F
DADF1 when a hard-down factor such as AIL is detected
Stop 3

FAIL state This is the state that finally transitions when an error occurs.
Stop the T subsystem 37.

DIAG state The diagnostic state is a state used by service personnel for repairs and the like, and various tests are performed according to a predetermined procedure set in the NVM.

In each of these states, a job (registration module) to be performed in that state is stored.
Among them, INIT state, STBY state, DIAG state,
One module is registered in each of the five states of the FAIL state and the HD-DWN state because they perform common processing regardless of the document supply mode. The registration modules stored in states other than these five states are as follows. The parentheses in each registration module are symbols corresponding to the document supply mode.

Feed-IN state Feed-IN (ADF), Feed-IN (DADF), Feed-IN (SAD
F), Feed-IN (2-UP), Feed-IN (LDC), Feed-IN (C
FF) REGIST state REGIST (ADF), REGIST (DADF), REGIST (SADF), REGI
ST (2-UP), REGIST (CFF) EXPEL state EXPEL (ADF), EXPEL (DADF), EXPEL (SADF), EXPEL
(2-UP), EXPEL (LDC), EXPEL (CFF) EXCHG state EXCHG (ADF), EXCHG (DADF), EXCHG (SADF), EXCHG
(2-UP), EXCHG (CFF) INVERT state INVERT (DADF) PURGE state RURGE (ADF), PURGE (DADF), PURGE (SADF), PURGE
(2-UP), PURGE (LDC), PURGE (CFF) The modules registered in these states are INPUT
A plurality of document supply modes cannot be executed simultaneously by the subsystem 37 (that is, each mode is exclusively controlled), and at the same time, one module is executed in one state according to the document supply mode. At first glance, it seems that the number of registered modules is large, but since each module performs control within the range corresponding to each state, it is a neat thing with a small number of steps, such as control program creation and debugging Can be performed efficiently.

FIG. 10 is a table showing transition conditions between the respective states. As the transition condition, a transition destination state that can transition from the transition source state is defined, and a condition for transitioning to the transition destination state is registered. The condition for the transition is that a specific signal is received from the sequence manager 32, as shown in the table, or that a predetermined operation (such as normal termination of SERVO MOTOR) is completed. The sequence manager 32 monitors the operation of all systems of the recording apparatus, and transmits the specific signal when a predetermined operation of each system is completed. This allows INPU
The T subsystem 37 can perform a state transition while synchronizing with another system.

In FIG. 11, an organic photosensitive material belt 4 is disposed as a photosensitive member of a transfer system and an optical system. Since the organic photosensitive material belt 4 forms the photosensitive material by coating the charge generating layer, the transfer layer and the like on any number of layers, the degree of freedom is greater than that of the photosensitive drum on which Se is deposited to form the photosensitive material. Since the manufacturing is easy, the cost can be reduced, and the space around the belt can be increased, thereby facilitating the layout.

On the other hand, the belt has expansion and contraction, and the diameter of the roll also changes due to the temperature difference.Therefore, a hole is provided in the belt and this is detected, the machine clock of one round is always counted, and the pitch is adjusted according to the expansion and contraction. It is necessary to correct the timing of the signal and the registration gate.

The organic photosensitive material belt 4 in this device has a length of 1 m or more, and 4 A4 size sheets and 3 A3 size sheets are mounted. However, since the belt has a seam, a panel (image formed on the belt) is always used. If the management of the formation area is not performed, a copy of the determined panel cannot be made, so that a reference signal is output at a position X near the roll 77a. This is called a get park, which is used to signal when the first panel to be copied by pressing the start button comes to the position X and to signal that a copy can be taken from here.

Organic photosensitive material belt 4 is charged corotron (charger) 60
, And is driven at a constant speed in the direction of the arrow in the figure. When the first panel comes a fixed time before the registration (exposure location) 71, a signal called pitch is issued, and the timing of scanning and feeding is set based on the pitch. The belt surface charged by the charge corotron 60 is exposed at an exposure location 71. A light image of a document placed on the platen glass 5 is incident on the exposure location 71. For this purpose, an exposure lamp 56, a plurality of mirrors 57-1 to 57-6 for transmitting reflected light of the original surface illuminated by the exposure lamp 56, and an optical lens 58 are arranged. Scanned for reading. Mirror 57
-4 to 57-6 constitute a second scanning optical system, which is a PIS
(Precession Image Scan) Since there is a limit in increasing the process speed, the second scanning optical system is moved in the direction opposite to the moving direction of the belt so that the copy speed can be increased without increasing the process speed. Is scanned to increase the relative speed and achieve a maximum of 64 sheets / min (CPM).

An electrostatic latent image corresponding to the document is formed on the organic photosensitive material belt 4 by the image information exposed in the slit shape at the exposure location 71. After an unnecessary image or erasing between images or side erasing is performed by an IEL (inter-image lamp) 64, the electrostatic latent image is developed by a developing device 59-1 which normally develops with a black toner, or developed by a color toner. A toner image developed by the developing device 59-2 is created.
The toner image moves with the rotation of the organic photosensitive material belt 4 and passes near a pre-transfer corotron (transfer device) 65 and a transfer corotron 66. The pre-transfer corotron 65 is used for weakening the electrical adhesion of the toner by applying an alternating current to facilitate the movement of the toner. In addition, since the belt is formed of a transparent material, the belt is illuminated with light from the back by a pre-transfer lamp 68 (also used for erasing) before transfer to further weaken the electrical adhesion of the toner and transfer is performed. Make it easier.

On the other hand, copy sheets stored in various trays or copy sheets fed manually along the manual feed tray 16 are sent out by feed rolls and fed to the transport path 50.
It is guided by 1 and passes between the organic photosensitive material belt 4 and the transfer corotron 66. Paper feed is basically LEF (Long
Edge feed), the registration gate is opened and closed so that the leading edge of the paper and the exposure start position coincide at the tacking point (position L in the figure), and the toner image is transferred onto the copy paper. And Detack Corotron
At 67, the paper and the photosensitive material belt 4 are peeled off, and after transfer, the copy paper passes between the phasor 521 and the pressure roll 541 and is thermally fixed, passes between the transport rolls 75 and 76, and is placed on a discharge tray (not shown). Is discharged.

The photosensitive material belt 4 from which the copy paper has been peeled is easily cleaned by the pre-clean corotron 69, and the lamp 68
Unnecessary charge is erased by light irradiation from the back by
Unnecessary toner, dust and the like are scraped off by the blade 70.

A patch is formed between the images on the belt 4 by the patch generator 61, and the electrostatic potential of the patch portion is measured by the ESV sensor 6.
Detected in 3 and used for density adjustment. A hole is formed in the belt 4, and the belt speed is detected by the belt hole sensor 62 to detect the belt speed, thereby controlling the process speed. ADC (Auto Density Control)
The sensor 71 compares the amount of reflected light from the toner on the patch portion with the amount of reflected light in the absence of toner to detect the degree of toner adhesion, and the pop sensor 72 wraps around the belt 4 without peeling the paper. Detects if it has happened.

Based on the above configuration, the present invention controls the supply of originals when the originals are set in parallel on the manual feed tray 610 and the recording of the originals on a copy sheet by reading the originals. I do.

(1) Document supply control In the 2-UP mode, the REAR side of the manual feed tray 610 and the FRO
Document NT side is set in parallel, insertion of a document into the REAR side is detected by-sensor (IN SNR) S _4, FRON
Insert Documents on the T side is detected by the B4 sensor (B4 SNR) S ₉ paper size sensor. Then, based on the detection signals of these sensors S ₄ and S ₉ , the registration roll 612
Servo motor (SERVO MOTO) that operates the positioning member consisting of
R: not shown) is controlled.

REGI ROLL 612 and REGIROLL
GATE) 615 waits for the document on platen 2 and lays the document on platen 2 from the standby state.
In the former standby state, the cashier roll 612 is released and the cashier gate 615 is closed, and in the latter case, the cashier nips the cashier roll 612 on the original and opens the cashier gate 615. And these cash register rolls 61
2. The registration gate 615 is controlled under the conditions shown in Table 1 so as to be synchronized.

The items in Table 1 are controls for preventing the next original from being laid on the platen when the original is discharged. In the section, first, the registration roll 612 nips, and after a lapse of a predetermined time (for example, 90 ms), the registration gate 61
5 opens.

FIG. 12 and FIG. 13 are timing charts showing the original discharging operation in the 2-UP mode and the SADF mode. In these cases, the original is registered (pre-registration sensor
S _13, S ₁₄ is a case where a final scan in ON state). Figure 12 has no next original on the manual feed tray 610, a operation in the case of OFF are both-sensor S ₄ and B4 sensor S _9, the LAST SCAN END signal servomotor predetermined time C (last original platen by the input of It is driven for a discharging time, for example, 598 ± 5 ms. Fig. 13 shows the manual feed tray 610
In a state where there is a next original (either ON state of-sensor S ₄ or B4 sensor S _9), document registration position is not ended skew correction (i.e., original registration position is not positioned) in the case is there. In this state,
As shown in the figure, the REGI RO
At the same time as LL612 is released, REGI GATE615 opens and the resist part is released. Then, after a lapse of a predetermined time A (for example, 170 ± 10 ms) from the input of the signal, the servomotor is driven for a predetermined time B (for example, 598 ± 5 ms). As a result, the unpositioned document is drawn into the platen without being read, and is automatically discharged from the platen. Therefore, reading of an erroneous document is prevented.

FIG. 14 is a timing chart showing control when an EXPEL command is input from the SQMGR 32. EXPEL command is a signal for instructing the discharge of the document from the platen, if the signal-sensor when entering (IN SNR) S ₄ is ON (i.e., if there is the next document REAR side of the manual feed tray 610) REGI GATE615 opens at the same time as REGI ROLL612 is released. The release of REGI ROLL 612 prevents the next original on tray 610 from being laid on the platen. After a lapse of 170 ms from the input of the EXPEL command, the SERVO MOTOR starts up and discharges the document from the platen. In such control, the manual feed tray
If the next original is detected on either the REAR side or the FRONT side of the 610, the same control is performed, and either the INSNR S ₄ or the B4 sensor S ₉ is turned on regardless of the illustrated example.
Is controlled as shown in FIG. EXPEL
If any of these sensors S ₄ and S ₉ is OFF when a command is input, it is determined that the next document is not on the tray 610. In this case, the SERVO MOT
OR is started.

(2) Control document size of the document size detection timing is detected by the paper size sensor S ₆ to S _14, in the present invention corresponds to the document feed mode,
The size detection timing is different. This depends on the document feed mode, IMM subsystem 34, OPT subsystem
39, marking subsystem 35, IEL subsystem 40, C
This is for efficiently synchronizing with the HM subsystem 33 and other subsystems, and will be described below for each document supply mode.

Document from the document tray (ADF tray) 602 for automatically feeding the ADF mode and DADF mode document is drawn, the registration sensor S ₃ is given from the turned ON by detecting the time (for example, 150 ms) after the elapse, paper size sensor S ₆ ~S ₁₄ detects the document size. In the DADF mode for recording original sides, also the registration sensor S ₃ in invert the document is turned ON, but not detected size at the time inverted, is output when inverting the paper size sensor S ₆ to S ₁₄ ON The signal is used as a trigger on the soft control of the recording device. Paper size ON signal of the sensor S ₆ to S ₁₄ when the invert has registration sensor S
It is configured to be output after a predetermined time (for example, 300 ms) has elapsed from the ON of ₃ .

To SADF mode and LDC mode the manual feed tray 610 is original is set, performs size detection from the ON pre-registration sensor S ₁₃ or S ₁₄ is after a predetermined time elapses. The time in this case is, for example, 600 ms, and can be appropriately changed by a diagnosis.

2-UP mode When two documents are set in parallel on the tray 610, the REAR PR
E REGI SNR S ₁₃ and FRONT PRE REGI SNR S ₁₄ are both ON
After a lapse of a predetermined time, size detection is performed. The predetermined time is, for example, 600 ms, and can be appropriately changed by a diagnosis. In the 2-UP mode, when a document is set on only one side (for example, the REAR side) of the manual feed tray 610 and the start button is pressed while the REAR PRE REGI SNR S ₁₃ is ON, the start button is pressed. The document size is detected simultaneously with the input of the INPUT START signal by the push button. This is to enable recording in a single-sided original state even in the 2-UP mode, as described later.

In the table FIG. 15 showing the correspondence between the output of the detection and paper size sensor original size of 2-UP mode when the paper size sensor S ₆ to S ₁₀ is arranged in the arrangement as shown in FIG. 7 is there. In the figure, the mark “○” indicates ON of the paper size sensor, which is an index of size detection,
The mark “x” indicates OFF, and the mark “△” indicates a sensor that does not serve as an index for paper size detection, and indicates that either ON or OFF may be used.

(3) Control of Document Supply in 2-UP Mode FIG. 16 is a timing chart showing the operation of document supply from the document set to the platen in the 2-UP mode. First, when a document is set on the REAR side of the manual feed tray 610, IN SNR S ₄ is turned ON, and this ON turns on the REGI ROLL 612.
Releases and REGI GATE 615 closes. R
The release of the EGI ROLL 612 allows the original to be inserted into the registration position, while the closing of the REGI GATE 615 prevents the original from being laid on the platen. The REAR PRE REGI SNR S ₁₃ is turned ON by inserting a document, and the REAR LED 630 is turned on 200 ms after this ON. As a result, the setting of the original on the REAR side and the display indicating that the reception of the next original is prohibited are performed, so that an operation error by the operator can be prevented. The user interface (U / I) displays "paper present (one side)" in synchronization with the lighting of the REAR LED 630. Then, when the document on the FRONT side of the manual feed tray 610 is set, B4 sensor (B4 SNR) S ₉ is turned ON,
Furthermore, when a manuscript is inserted, FRONT PRE REGI SNR S
₁₄ turns ON. Then, after 200ms from ON of the sensor S ₁₄
The FRONT LED 631 is lit to indicate that the original has been set on the FRONT side and that the next original cannot be accepted, and that the user interface (U / I) indicates “paper ants (both sides)”. Such F
RONT performs detection of the document size from the ON of the PRE REGI SNR S ₁₄ after 600 ms, and transmits this size information in SQMGR 32. When the start button is pressed in this state, first, REGI R
OLL 612 nips the document, and after 90 ms REGI GATE 615 opens. After that (after 170 ms), the servo motor is started and the parallel originals are simultaneously supplied to the platen.
In the sections P, Q, R, and S in the figure, the start button is pressed in these sections. In the section P, "no paper" is recognized, and the servo motor is not started. In section Q, wait for 600 ms (this time is the time until the document settles to the predetermined position on the REAR side) from the time when the REAR PRE REGI SNR S ₁₃ is turned on, and detect the size of the document set on the REAR side. Then, the REGI ROLL 612 nips and the REGI GATE opens 90 ms later, and then the servomotor is started 170 ms later to supply the document to the platen to start reading and recording. In section R, from ON of FRONT PRE REGI SNR S ₁₄
After waiting for elapse of 600 ms, REG
The nip of I ROLL 612, the opening of REGI GATE 615, and the start of the servo motor are performed. In this case, the size of the document is detected at the same time as 600 ms has passed since the FRONT PRE REGI SNR S ₁₄ was turned ON, and the size information is output to the SQMGR 32. In the section S, since the detection of the document size has been completed, the REGI ROLL 612 immediately nips, the REGI GATE 615 opens 90 ms later, and the servomotor starts 170 ms later.

(4) Recording control of one-sided original in 2-UP mode As described in the above (2) and (3), the present invention
In the mode, recording of only one side original can be started.

FIG. 17 is a correlation diagram between subsystems showing control in this case. In the STAND BY state, the 2-UP mode is selected by the user interface (U / I), and the signal is input from SQMGR to DADF. When a document is set on the REAR side of the manual feed tray 610 in DADF, the INPUT TRA
Outputs Y STATUS signal to SQMGR. After that, when the start button is pressed in a state where the original is not set on the FRONT side of the manual feed tray 610, the state transits to the SET UP state by the input of the signal, and the INPUT START signal is output from the SQMGR to the DADF. . As a result, DADF detects the document size and sends the size information to SQMGR. The SQMGR transmits this size information (DOC SIZE signal) to the user interface (U / I), and the size is displayed on the user interface. By outputting the size information, the document size is no longer detected. And INPUT
670ms after receiving the START signal, DADF outputs the FEED IN signal to SQMGR to notify the setting of the original on the REAR side, and the INPUT TRAY STAT to notify that the FRONT side is empty.
Output US signal to SQMGR. This INPUT TRAY STATUS signal is output to the U / I, which recognizes that there is no original on the FRONT side and displays it. After that, the DADF outputs a DOC REG signal notifying the positioning on the REAR side to the SQMGR. Next, the status changes to CYCLE UP, and the SQMGR outputs a START COPY signal to the IMM. At this time, the SQMGR outputs the document size (A4S in the embodiment) to the IMM. By inputting this signal, the IMM instructs the photosensitive belt to form an image corresponding to the REAR side where the original is set, and instructs the FRONT side where the original is not set to erase. After that, the state transitions to the CYCLE state, where the original is read and the original image is recorded on copy paper.In this recording, the image is erased on the FRONT side where the original is not set, so it corresponds to the FRONT side The copy paper portion to be output is output in a blank state. Therefore, even when one side of the copy sheet is used for memos, etc., extremely clear memo writing can be performed.

(5) Control of document set display The document set is displayed on the REAR and FRONT sides of the bypass tray 610 as described in the previous section (3).
And is indicated by the lighting of the FRONT LED 631. Lighting of these LED 630 and 631 are performed after lapse of the corresponding respective PRE to REGI SNR S ₁₃ and S ₁₄ a predetermined time after ON of (200 ms) is notified to the operator is performed, since the next document acceptance prohibition is displayed, An operator's operation error can be prevented. Since the lighting of this LED has been described in the above (3), it is omitted, and the timing of turning off the LEDs 630 and 631 will be described below.

Figure 18 shows the LEDs in SADF mode and 2-UP mode
Indicates the turn-off timing of the corresponding PRE REGI SNR S ₁₃ ,
S ₁₄ is turned off in synchronization with the OFF. FIG. 19 shows the light-off timing in the LDF mode, in which the LEDs 630 and 631 are turned off in synchronization with the stop of the servo motor for supplying the document. These L
By turning off the ED, the operator can confirm that the manual feed tray is empty, and the next document can be set. For this reason, the operation of the operator can be facilitated.

〔The invention's effect〕

As described above, according to the document supply device of the present invention,
In the 2-UP mode, the sensor for detecting the document size and the sensor for detecting the set of documents are used in combination, so that the number of sensors can be reduced and the design control of the arrangement position of the sensors can be eased. Since the supply of the original to the platen is controlled based on the signals of the two positioning detection sensors provided at the same positioning position, it is possible to eliminate irregularities in the leading ends of the two originals in the 2-UP mode. Further, since the prohibition of the supply of the next original is displayed, it is possible to avoid a situation where the original is supplied redundantly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory view showing the overall configuration of a copying machine, and FIG. 3 is a copying machine system applied to the present invention. FIG. 4 is an explanatory diagram showing a hardware configuration of a copier to which the present invention is applied by a CPU, FIG. 5 is an explanatory diagram showing a state division of a main system, and FIGS. b) is an explanatory view showing the configuration of the document feeder of the present invention, FIG. 7 is a view showing the relationship between the paper size sensor of the tray and the document, and FIG.
Explanatory diagram showing the relationship between subsystems, FIG. 9 is a transition diagram of the INPUT subsystem state, FIG. 10 is a table showing transition conditions between the states, FIG. 11 is a side view showing the optical system and the transfer system, and FIG. FIGS. 13, 14 are timing charts showing the operation of the positioning member, FIG. 15 is a table showing document size detection in the 2-UP mode, FIG. 16 is a timing chart showing operation in the 2-UP mode, FIG. Figure 17 shows 2-
FIG. 18 and FIG. 19 are timing charts showing the timing of turning off the LED, showing the correlation between the subsystems showing the recording control of one-sided original in the UP mode. DESCRIPTION OF SYMBOLS 1 ... Base machine 2 ... Platen glass 3 ... Optical system (scanning exposure device) 4 ... Sensitive material tray 5 ... Marking system 6-1 ... Upper belt, 6-2 ... Middle tray 6-3: Lower tray, 7: Paper transport system 9,10: Inverter 11: Duplex tray 12: User interface 12a: NVRAM, 13: DADF 16: Multi-sheet inserter 17: HCF, 19: Sorter 20: Simple catch tray 31: Main board 32: SQMGR subsystem 33: CHM subsystem 34: IMM subsystem 35: Marking subsystem 36: U / I subsystem 37 ... INPUT subsystem 37a ROM 38 OUTPUT subsystem 39 OPT subsystem 40 IEL subsystem 41 Main CPU 42 Marking CPU 43 INPUT CPU 44 OUTPUT CPU 45 ... CPU for OPT 46 ... CP for U / I U 47 CPU for IEL 48 Serial bus 50 Jam detection unit 51 Sensor 52 Judgment unit 53 Detection control unit 54 Fuser control unit 55 Platen glass 56 Exposure lamp 57 … Mirror 58… Lens 59… Development device 60… Charge corotron 61… Patch generator 62… Belt hole sensor 63 …… ESV sensor 64 …… Inter-image lamp 65 …… Pre-transfer corotron 66 …… Transfer corotron 67 Detach corotron 68 Pretransfer lamp 69 Preclean corotron 70 Blade 71 Exposure position 72 Pop sensor 77 Roll 600 Exposure point 601 Document 602 Document tray 603 Delivery paddle 605 First drive roll 606 Driven roll 607 Second drive roll 608 Driven roll 609 Arc transport path 610 Manual feed Feeding path 611… Horizontal conveying path 612… Register roller 613… Driven roller, 615… Register gate 616… Reverse conveying path 617… Reverse roller 619… Belt drive roll 620… Driven roll 621… Belt 622 ...... discharge roller 625 ...... cleaning tape 626 ...... tape winding roll 627 ...... skew rolls 630 ...... LED (REAR side) 631 ...... LED (FRONT side) S ₁ ...... no paper sensor S ₂ ...... take Away sensor S ₃ …… CFF sensor S ₄ …… In sensor S _{6 to} S ₁₀ …… Paper size sensor S ₁₁ …… Discharge sensor S ₁₂ …… End sensor S ₁₃ …… Pre-registration sensor (REAR side) S ₁₄ …… Pre-registration sensor ( FRONT side)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B65H 7/02 G03G 15/00 107 G03G 21/00 370

Claims (3)

(57) [Claims] An original supply device having an original supply mode for simultaneously supplying a plurality of originals set in parallel on an original tray onto a platen, wherein a first original of the plurality of originals passes through First and second document detection sensors provided in one passage area and arranged at a distance smaller than a size of the one document in the passage direction in the passage direction of the one document; Is provided in a second passage area of the original tray through which another original among the plurality of originals passes side by side with the first original, and the other original in the direction of passage of the other original Third and fourth document detection sensors arranged with an interval smaller than the size of the other document in the passing direction; and the one and the fourth document detection sensors based on detection signals of the first to fourth document detection sensors. Platen of other manuscript Control means for controlling the supply of the document. One of the third and fourth document detection sensors has a configuration for outputting a size signal in addition to the presence / absence signal of the document. Another document detection sensor in the fourth document detection sensor is one of the first and second document detection sensors.
The first and second original detection trays for the one and other originals based on the detection signals of the first to fourth original detection sensors. And setting the positioning on the first and second passing areas,
And the first and the fourth document detection sensors in the first and second document detection sensors.
A document supply device configured to determine a total size of the one and other documents from the size signals of the two document detection sensors. 2. A document supply apparatus having a document supply mode for simultaneously supplying a plurality of documents set in parallel on a document tray onto a platen, wherein a first document out of the plurality of documents passes through the tray. First and second document detection sensors provided in one passage area and arranged in the direction of passage of the one document with an interval smaller than the size of the one document passage direction; Adjacent to the passage area, another document in the plurality of documents is provided in a second passage area of the document tray through which the other document is juxtaposed and passes, and the other document is moved in the direction of passage of the other document. Third and fourth document detection sensors arranged with an interval smaller than the size of the document in the passing direction, between the first and second document detection sensors, and between the third and fourth documents Placed between detection sensors A roll that nips the one or other document and supplies the same to the platen side; a gate provided on the document discharge side of the document tray to close and position the one and other documents; A detection signal from the first to fourth document detection sensors is supplied, and the one or other document is stored in the first tray of the document tray.
Alternatively, when the roll is set in the second passage area, the nip of the roll is released and the gate is closed, and when the one and other documents are positioned, the one and other documents are placed on the roll. A document feeder comprising a control means for nipping and opening said gate. 3. A document supply apparatus having a document mode for simultaneously supplying a plurality of documents set in parallel on a document tray onto a platen, a plurality of detecting means for detecting the plurality of documents on the document tray; Document transport means for transporting a plurality of documents from the document tray to a platen for reading a document and discharging the documents from the platen to a discharge unit; and positioning the plurality of documents at a predetermined position before transporting the plurality of documents to the platen. A plurality of display means corresponding to the plurality of originals, which are turned on until the plurality of originals are separated from the positioning means and conveyed to the platen to inhibit supply of the next original; and When at least one of the detecting means detects at least one of the plurality of originals, the positioning means precedes at least one of the plurality of originals. After being positioned at a predetermined position, the document conveying means conveys at least one of the plurality of documents to the platen to cause the image forming means to read the document, and at least one of the plurality of display means. And control means for turning off at least one of the plurality of display means being turned on when at least one of the plurality of originals is conveyed to the platen, wherein the control means comprises: When at least one of the documents does not detect a document on the document tray, the image forming unit deletes the record of a portion corresponding to the document not detected, and the plurality of display units corresponding to the document not detected. A document supply device, wherein at least one of the document supply devices is not turned on.