JP2712449B2 - Document holding control unit of document feeder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document press control device of a document feeder, and more particularly, to controlling the elevation of a document press based on the size and discharge speed of a discharged document, The present invention relates to a document holding control device of a document supply device capable of performing document alignment.

(Background technology)

2. Description of the Related Art In recent years, recording apparatuses such as copiers have been using advanced control technology and data processing technology with the introduction of computers, and available functions have been diversified. 1x copy,
In addition to the main functions such as enlargement, reduction, copy density selection, and duplex copying, for example, even when a method of placing a document on a platen, a method of manually placing the document on the platen by a user or using a document supply device is used. There is a method of automatically supplying a document.

As a document feeder, a device capable of a single-sided automatic document feed (ADF: auto document feeder) mode and a semi-automatic document feed (SADF: semi-auto document feeder) mode is generally used. In addition, due to diversification of document types and various demands for copy forms, a device that can use a large document automatic feed (LDC: Long Distance Copy) mode and a computer form feeder (CFF) mode that sends continuous paper for computers are used. Equipment that can
There is a device that can use the parallel original automatic feed (2-UP) mode that sends two originals of the same size at the same time.
The two-sided automatic document feeder (DADF :) enables you to reverse the original supplied to the platen and copy the information on the front and back of the original.
A device using a duplex auto document feeder mode has also been developed.

The use of such a document feeder further promotes the automation of the copying operation of the copying machine, thereby reducing the user's labor, saving time, facilitating the operation, and improving the copying efficiency of the copying machine. Benefits can be obtained.

Conventionally, as a document aligning mechanism of a document feeder, for example, as shown in FIG. 13 (a), a document discharge tray a is inclined so that the leading end side thereof is higher, or as shown in FIG. 13 (b). As shown in FIG. 13, a horizontally disposed document discharge tray a is provided with a stopper b at the tip, and as shown in FIG. 13 (c), the document discharge tray a having a stopper b at the tip is lower on the tip side. The one that is inclined as follows,
As shown in FIG. 13 (d), there has been known a guide c which is swingable up and down and provided with a weight d at the tip. However, in the document discharge tray a, when documents having different weights are continuously discharged at a high speed, for example, page disorder due to the documents not being stacked in the discharge order, discharge jam due to closing the discharge port, or , The inconvenience such as document variation due to the indeterminate stop position of the document,
Further, due to the improvement in DPM (Document Per Minute: the number of documents conveyed per minute), the sweeping speed at the time of discharging a document is increased, and the discharged document may jump out of the document discharge tray. To solve this problem, there has been proposed a document feeder having a document pressing arm as disclosed in Japanese Patent Application No. 63-18109, "Automatic Document Feeder". As shown in FIG. 14, this document feeder is provided with a document holding arm e, which is moved up and down at a constant timing synchronized with the discharge of the document, above the discharge tray a. "e" has a non-slip rubber pad "f" at its tip and is configured to be moved up and down by a solenoid g. The document holding arm e is moved up and down at a predetermined timer value from the time when the ejection of the document is started by rotation of a platen belt (not shown). After that, the document is lowered to hold the document.

[Problems to be solved by the invention]

However, according to the document supply device having the document holding arm, compared with a document supply device without the document holding arm,
Although the accommodation capacity of the document is greatly improved, the document holding arm is raised and lowered at a certain timing (in other words, a certain timer value) to stop the document regardless of the document size. If the document is pressed at the timing when it reaches the A3 document, variations will remain in small documents such as B5 documents, and if the document is pressed at the timing suitable for B5 documents, a jam may occur at the rear end of large documents. However, there is an inconvenience that not all documents can be pressed at an appropriate timing. Further, in a document supply apparatus having a plurality of discharge speeds for discharging a document, there is also a disadvantage that the stop position of the document differs depending on the discharge speed, which causes a variation. Furthermore, machine differences in the document feeder (individual differences inevitable in manufacturing)
For example, even if the document holding arm is controlled at a certain timing, the position where the document is held is different due to a difference in the operating speed of a solenoid that drives the document holding arm, etc. There was a problem of fear.

A first object of the present invention is to provide a document pressing control device of a document feeding device capable of pressing documents of all sizes at appropriate timing without variation.

A second object of the present invention is to provide a document pressing control device of a document feeding device capable of pressing a document at an appropriate timing according to a discharge speed.

A third object of the present invention is to provide a document pressing control device of a document feeding device capable of adjusting the elevation of the document pressing according to the machine difference of the document feeding device.

[Means for solving the problem]

According to the present invention, in order to realize the first and second objects described above, a plurality of timer values for defining the operation of the original pressing are set for each original size and each original discharge speed, and based on the original size and the original discharge speed. In addition, the present invention provides a document pressing control device of a document feeding device which controls a document pressing by inputting a corresponding timer value.

Further, in order to realize the third object, the present invention sets a plurality of timer values for defining a document pressing operation for each document size and for each document discharge speed, and sets a corresponding timer based on the document size and the document discharge speed. It is an object of the present invention to provide a document press control device of a document feeder which can control a document press by inputting a value and adjust the timer value.

That is, the document press control device of the document supply device according to the present invention includes:
The following means are provided for achieving the first and second objects.

In the following description, “document holding arm” is used as a term by way of example.

(1) First storage means A plurality of reference timer values that define the operation of the document pressing arm are stored. The reference timer value is, for example,
A plurality is stored for each document discharge speed. However, in a document feeder in which the document discharge speed is constant, it is needless to say that only the document size may be used.

(2) Document Size Detector Detects the size of the document and outputs a document size signal.
Generally, the document feeder is equipped with a document size detection sensor for use in the APMS mode (automatic paper selection function) or the like, and therefore can be used as document size detection means.

(3) Control means A plurality of reference timer values are input to create a timer value table, and a document size signal (and, if necessary,
Based on the document discharge speed, a corresponding timer value is input from the timer value table to control the document pressing arm.

Here, the document size signal is input from a document size detection sensor, and the document discharge speed (ie, the motor rotation speed for driving the platen belt) is uniquely determined by the copy mode and the number of copies. Is input to make a determination. In a document feeder having a constant document discharge speed, the timer value is determined and controlled only by the document size signal.

Further, the document holding arm control device of the document supply device of the present invention employs a first method or a second method described later to realize the third object.

First Method In addition to the above-described first storage means, document size detecting means, and control means, an input means is provided.

(1) Input means Changes the reference timer value stored in the first storage means. Entering a new reference timer value is adjusting the reference timer value, in other words, adjusting the timer value to create a timer value table based on the reference timer value. For example, enter the reference timer values that you want to change for each document size and document output speed,
Adjust the timer value.

Second Method In addition to the above-described first storage means, original size detection means, and control means, the apparatus further includes a second storage means and an input means, and the control means performs control described later.

(1) Input means A means for inputting an adjustment value (adjustment data of the reference timer value). Inputting the adjustment value, that is, adjusting the reference timer value. The adjustment values are, for example,
It is better to input each for each document discharge speed.

(2) Second storage means Stores adjustment values (adjustment data of reference timer values). For example, “0” is set in advance in the second storage unit as a default value of the adjustment value, and the adjustment value is changed by the above-described input unit as needed. Once the adjustment value is adjusted by adjusting the document holding arm, it is data to be used repeatedly.
It is good to use M etc.

(3) Control means A timer value table is created, and a corresponding timer value is input from the timer value table based on the document size signal (and the document discharge speed as necessary),
Controls the document holding arm.

The timer value table is created based on the reference timer value stored in the first storage unit and the adjustment value stored in the second storage unit. Specifically, the creation of the timer value table differs depending on the adjustment value setting method. For example, when the adjustment value is an increase or decrease from the reference timer value, the adjustment value is added (subtracted) to the reference timer value. be able to.
The calculation of the timer value is performed as a part of the initialization process (operation preparation process) of the document supply device. In a document feeder having a constant document discharge speed, the timer value is determined and controlled only by the document size signal.

[Action]

In the initialization process of the document supply device, the control unit creates a timer value table according to a predetermined procedure. Thereafter, when a document size signal is input from the document size detection sensor, a corresponding timer value is input from a timer value table based on the document size signal and the discharge speed. Next, when the discharging operation of the document is started, the document holding arm is raised by the time of the timer value, and when the timer value is reached, the document is lowered and discharged at an appropriate timing suitable for the document size and the discharging speed. Hold with. On the other hand, when adjusting the lowering timing of the document holding arm (that is, the timer value), in the above-described first method, the timer value is adjusted by directly changing the reference timer value via the input unit. In the second method, the adjustment value of the second storage means is changed via the input means, and in the subsequent initialization processing, the control means controls the reference timer value of the first memory and the second memory value of the second memory. Timer value (adjusted timer value) based on the adjustment value (changed adjustment value)
Is calculated to adjust the timer value. By adjusting the timer value in this manner, the document holding arm is lowered at a timing corresponding to the adjusted timer value, and the timing of lowering the document holding arm is adjusted.

〔Example〕

FIG. 1 is a block diagram showing a first embodiment of a document holding arm control device of a document supply device according to the present invention, in which a timer value is adjusted by a second method. A ROM (first storage means) 37a storing a reference timer value, a document size detection sensor 37b composed of a plurality of photo sensors for detecting the size of a document, a solenoid 630 which is a driving unit of a document pressing arm 629, A user interface 12 (input means) for inputting a value, an NVRAM (second storage means) 12a for storing an adjustment value input by the user interface 12, and a timer value table based on the reference timer value and the adjustment value An input subsystem (control means) 37 for inputting a corresponding timer value from the timer value table based on the document size signal and the document discharge speed and controlling the document pressing arm.

Here, prior to the description of the document pressing arm control device of the present invention, an outline of the overall configuration of a copying machine to which the present invention is applied will be described.

FIG. 2 is a diagram showing an example of the overall configuration of the copying machine. 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 space required for disposing the copying machine, a copying machine having a clean design that does not protrude from the base machine 1 is realized. An inverter 9 is provided in the paper transport system 7 for transporting the paper in the paper feed tray.
10 and a duplex tray 11 are arranged.
Further, a user interface 12 composed of a CRT display is mounted on the base machine 1, and a document feeder (here, a duplex auto document feeder: hereinafter referred to as DADF) 13 is mounted on the platen glass 2. The supply side of the paper transport system 7 is provided with an MSI (multi-sheet sawer: manual feed tray).
6 and an HCF (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. Reference numeral 4 denotes an organic light-sensitive material belt. The organic light-sensitive material belt 4 forms a light-sensitive material by coating the charge generation layer, the transfer layer, and other layers, and has a greater degree of freedom than a photosensitive drum. As it becomes easier, the cost can be reduced, and the space around the belt can be increased,
There is a feature that the layout becomes easier. Reference numeral 20 denotes a simple catch tray which is a tray for discharging a document.

FIG. 3 is a diagram showing a system configuration 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, a copying machine system to which the present invention is applied has an SQMR subsystem 32 and a CH on a main board 31.
Four subsystems consisting of M subsystem 33, IMM subsystem 34, marking subsystem 35, and surrounding
It is composed of nine subsystems consisting of a U / I subsystem 36, an INPUT subsystem (document feeder control system) 37, and five subsystems consisting of an OUTPUT subsystem 38, an OPT subsystem 39, and an IEL subsystem 40. I have. Then, for the SQMGR subsystem 32, the CHM subsystem
The IMM subsystem 33 and the IMM subsystem 34 are executed by software under the main CPU 41 shown in FIG. 4 together with the SQMGR subsystem 32, and are therefore connected by an interface between subsystems (represented by solid lines) that does not require communication. But,
The other subsystems are executed by software under a CPU separate from the main CPU 41, and are thus 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 copy mode determination, and job recovery.In particular, in the document holding arm control device of the present invention, It serves as an input means for the adjustment value.

The INPUT subsystem 37 is a control system for the document feeder, and includes automatic document feed (DADF), semi-automatic document feed (SADF), large size (A2) document feed (LDC), and computer form document feed (CFF). ), Controls the automatic feeding of two originals (2-UP), detects the size of the original, and the like, and further functions as a control unit in the original holding arm control device.

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, strict timing is required mechanically, and for communication that cannot be synchronized with the timing of serial communication, an interrupt port (INT terminal signal) is provided for each CPU and interrupts are issued by a hot line different 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 a communication cycle of 100 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. by. 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 for the DADF 13 and a control program for 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 required for a copy operation is read through the user interface 12, and is loaded into the additional storage device. It has become so. This loaded program is
The copy operation is controlled 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, IC
Other storage media, such as cards, magnetic cards, floppy disks, etc., can also be used as non-volatile 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 a service person for repair or the like, and performs various tests based on the conditions set in the NVRAM. In this embodiment,
The lifting / lowering timing (timer value) of the document holding arm is adjusted in the diagnostic mode, and the NVRAM adjustment value 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 an initialization command is issued to each subsystem. 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 fuser idles for a predetermined time, and when the fuser reaches a predetermined control temperature, the 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 start key is pressed again when copying in the platen mode, the process returns to the setup in the case of restart. 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 is made to cycle down.

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

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.

The document supply device and the document holding arm control device 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 controlled by the document feeder control system of the present invention.
Single-sided automatic document feed (ADF) mode, double-sided automatic document feed (D
ADF) mode, semi-automatic original feed (SADF) mode, automatic parallel original feed (2-
UP) mode, large-size automatic document feed (LDC) mode, and computer form feeder (CFF) mode for feeding continuous paper for a computer.

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. On the document sending side of the document tray 602, there is a delivery paddle 6
Numerals 03 are arranged so that the original 601 is sent out one sheet at a time. The fed original 601 is provided with a first driving roller 605, its driven roller 606, and a second driving roller 607.
Is transported to the arc-shaped transport path 609 by the driven rollers 608. Further, the arc-shaped conveyance path 609 joins 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 the third drive roller 612. The driven roller 613 is provided. The third drive roller 612 is vertically movable up and down by a solenoid (not shown), and is configured to be able to contact and separate from the driven roller 613. The horizontal transport path 611 is provided with a stop gate 615 that is rotated by a drive motor (not shown), and a reversing transport path 616 is connected from the horizontal transport path 611 to an arc-shaped transport path 609. A fourth drive roller 617 is provided in the reversing conveyance path 616. Further, the platen glass 2 faces the exit of the horizontal transport path 611.
A belt drive roller 619 is provided on the drive roller 620, and the belt 621 stretched between the driven rollers 620 can rotate forward and reverse. A fifth drive roller 62 is provided at the outlet of the belt transport section.
Two are provided. A document holding arm 629 having a rubber pad 628 at the end thereof is provided above the document discharge tray 627. The document holding arm 629 is moved up and down by a solenoid 630. Further, a sixth drive roller 623 is disposed on the SADF document tray 610. Two drive rollers 623 are provided in the front-rear direction of the base machine 1 (perpendicular to the paper surface in the drawing), and are configured to be able to simultaneously feed two originals of the same size.
625 is a delivery paddle 603 by a seventh drive roller 626.
Is a cleaning tape for cleaning the surface.
Next, the photosensors S _{1 to} S ₁₂ will be described with reference to FIG.
Will be described. S ₁ is no paper sensor for detecting the presence of a document 601 on the document tray 602, S ₂ is the take-away sensor for detecting passage of the document, S _3, S ₄ are the transport path for manual feeding
Feed sensor provided before and after the 610, S ₅ is stopped is corrected skewing of the document by the skew roller 631 gates 6
Registration sensor that document in 15 to detect whether or not in position, the role of the document size detection sensor 37b of S ₆ to S ₁₀ is in paper size sensor for detecting the size of the document original pressing arm control device in this embodiment Doubles as well. S ₁₁ is a discharge sensor, S ₁₂ for detecting whether the document has been discharged is an end sensor for detecting the end of the cleaning tape 625.

With the above configuration, the control of the document pressing arm control device in the order of operating conditions of the document pressing arm control device of this embodiment, creation of a timer value table, control of the document pressing arm, and adjustment of the timer value will be described in detail. .

Operating conditions of the document holding arm control device of the present embodiment As described above, the document feeding device of the present embodiment has a single-sided automatic document feed (ADF) mode, a double-sided automatic document feed (DADF) mode, a semi-automatic document feed (SADF) mode , 2 of the same size
Parallel original automatic feed (2-UP) mode, which simultaneously sends two originals, large original automatic feed (LDC) mode, computer form feeder (CF) which sends continuous paper for computers
The configuration is such that six types of document supply modes of F) mode can be implemented. Of the six types of document supply modes, four modes that require document alignment by the document holding arm 629 are the ADF mode, the DADF mode, the SADF mode, and the 2-UP mode. These modes are controlled by the document pressing arm control device. Therefore, the size of the target document is B5LEF (Long Edge Feed), A4LEF, B4SE
There are six sizes: F (Short Edge Feed), B5SEF, A4SEF, A3SEF. Although not described in detail, the drive servomotor of the document feeder is switched between low speed and high speed according to the number of copies to drive, thereby preventing the temperature of the servomotor from rising and eliminating the pitch skip to improve efficiency. A good copy method is adopted. Therefore, there are two types of document discharge speeds, low speed and high speed, based on the low speed and high speed of the driving servomotor.

FIG. 7 shows the reference timer value data stored in the ROM 37a, the adjustment value data stored in the NVRAM 12a, and the timer value table data created from the two. It is. Hereinafter, the creation of the timer value table will be described with reference to FIG. The creation of the timer value table is performed as one of the initialization processes of the document supply device when the copier body is powered on (when power is supplied). First, when the power of the copying machine is turned on,
The adjustment values shown in FIG. 7 (in this embodiment, eight data are stored as adjustment values based on six types of original sizes and two types of speeds) are transferred from the NVRAM 12a to the INPUT subsystem 37. . Upon receiving the adjustment value, the INPUT subsystem 37 inputs a reference timer value (similarly, eight pieces of data) stored in advance from the ROM 37a, adds the corresponding reference timer value and the adjustment value, and calculates the timer value. Is calculated to create a timer value table.

The adjustment value indicates an increase or decrease from the reference timer value, and is ± 500
Can be set at intervals of 10 msec, and “0” (unit: msec) is set as an initial value. Therefore, the calculation of the timer value is, for example, in the case of B5LEF (low speed) mode,
Add the adjustment value of 0 msec to the reference timer value of 400 msec and set the timer value to 40
Find 0msec.

Control of Document Holding Arm Control of the document holding arm will be described with reference to FIGS. 1 and 6A and 6B. A document is set on the document tray 602, and the number of copies and the like are input via the user interface 12. After that, the copy operation is started by pressing the start button. INPUT subsystem 37 (DAD
Upon receiving the notification that the start button has been pressed, the control system of F13 rotates the sending paddle 603 according to a predetermined procedure, supplies the documents one by one to the document transport path, and stops the stop gate 61.
Transport to position 5. Original conveyed to the position of the stop gate 615, along with being subjected to oblique feed correction of the document by the skew roller 631, is detected original size by the original size detecting sensor (paper size sensor S ₆ ~S _10). Subsequently, after a predetermined time has elapsed, the stop gate 615 is opened, the document is conveyed to a predetermined registration position on the platen 2, and the document is scanned. INPUT subsystem 37
When a notification of document discharge (or document replacement) is received from the copier body, the corresponding timer value table is used based on the document size detected by the document size detection sensor and the speed (low speed or high speed) of the servo motor. Enter the timer value. As shown in FIG. 8, the timer value is set based on the rotation of the servomotor as a base point.
Is turned on, in other words, the time from the start of the document discharging operation to the start of lifting of the document pressing arm 629. The INPUT subsystem 37 measures the time with a predetermined internal timer at the same time as turning on the servomotor, and when the timer value is reached, the solenoid 63
Turn on 0. As a result, the document holding arm 629 is raised, and the document can be discharged. The INPUT subsystem 37 activates the solenoid 630 for a predetermined time (300 ms in this embodiment).
ec) When it is turned on, it is turned off, the document holding arm 629 is lowered, and the document is pressed and aligned at an appropriate timing according to the document size and discharge speed.

Adjustment of Timer Value Next, specific adjustment of the timer value will be described with reference to FIGS. 9 and 1. Normally, the adjustment of the timer value is performed when a copying machine or the like is carried in, that is, in the first copy test,
It is carried out as part of the on-site work by service personnel.
Therefore, since the initial values of the adjustment values are all "0" as described above, the reference timer value stored in the ROM 37a is used as the substantially initial timer value. For example, when a B5LEF original is ejected at a low speed, the timing of pressing the original by the original pressing arm 629 is slightly faster, so that the trailing edge of the B5LEF original is
A jam occurred near the exit of ADF13. In this case, it is necessary to adjust the timing of pressing the original by the original pressing arm 629 slightly later. In other words, it is necessary to increase the adjustment value and increase the timer value. Since the adjustment of the timer value is performed in the diagnostic mode, the diagnostic mode is selected from the user interface 12 and the adjustment value is increased by 20 msec by a preset procedure (for example, B5LEF / LO
Enter W = 20). Thereafter, when the diagnosis mode is ended, the adjusted value (20 msec) changed is stored in the NVRAM 12a via the user interface 12, as shown in FIG. When the power is turned off and on again, the adjustment value of NVRAM12a becomes INP
The new adjustment value is sent to the UT subsystem 37 and input. The INPUT subsystem 37 inputs a reference timer value from the ROM 37a and creates a timer value table.

Calculation of B5LEF (low speed) 400 + 20 = 420 (unit: msec) As a result, the timer value is adjusted to 420 msec.

When the timer value is adjusted and the B5LEF document is discharged at a low speed, the INPUT subsystem 37 controls the solenoid 630 based on the timer value of 420 msec, and lowers the document holding arm 629 at the adjusted appropriate timing. Hold the manuscript. Next, the adjustment in the case where the timing of pressing the document by the document pressing arm 629 is late will be described, taking as an example the case where the A4LEF document is discharged at a low speed. Similarly, adjustment values (eg, A4LEF /
LOW = −30), the INPUT subsystem 37 is set to NVRA
A timer value table is created based on the adjustment value of M12a and the reference timer value of ROM 37a.

A4LEF (low speed) calculation 400 + (-30) = 370 (unit: msec) As a result, the timer value is adjusted to 370 msec.

FIG. 10 is a block diagram showing a second embodiment of the present invention, in which the timer value is adjusted by the first method. An NVRAM 12a (here, used as a first storage means) for storing a reference timer value, a document size detection sensor 37b for detecting the size of a document including a plurality of photosensors, and a drive unit for a document pressing arm 629. solenoid
630, a user interface 12 (input means) for inputting a reference timer value to be changed, and a timer value table created by inputting the reference timer value stored in the NVRAM 12a, and a timer based on the document size signal and the document discharge speed. An input subsystem (control means) 37 for inputting a corresponding timer value from the value table and controlling the original pressing arm.

In the above configuration, creation of the timer value table,
The control of the document holding arm control device will be described in detail in the order of adjusting the timer value. The operation conditions of the document pressing arm control device and the control of the document pressing arm are common to those in the first embodiment, and the description thereof is omitted.

Creation of Timer Value Table FIG. 11 shows reference timer value data stored in the NVRAM 12a and data of the timer value table. Hereinafter, the creation of the timer value table will be described with reference to FIG. The creation of the timer value table is performed as one of the initialization processes of the document supply device when the copier body is powered on (when power is supplied). First, when the power of the copying machine is turned on, the reference timer value shown in FIG. 12 (in this embodiment, eight data are stored as adjustment values based on six types of document sizes and two types of speeds). Is transferred from the NVRAM 12a to the INPUT subsystem 37. Upon receiving the reference timer value, the INPUT subsystem 37 stores the reference timer value in the corresponding area of the timer value table, and completes (creates) the timer value table.

Adjustment of Timer Value Next, a specific adjustment of the timer value will be described with reference to FIG. 12 and FIG. Normally, the adjustment of the timer value is performed when a copying machine or the like is carried in, that is, in the first copy test,
It is carried out as part of the on-site work by service personnel.
For example, when the B5LEF document is discharged at a low speed, the timing of pressing the document by the document pressing arm 629 is slightly faster, so that the rear end of the B5LEF document is jammed near the exit of the DADF13. In this case, it is necessary to adjust the timing of pressing the original by the original pressing arm 629 slightly later. In other words, it is necessary to increase the reference timer value and adjust the timer value to a large value. Since the input of the reference timer value is performed in the diagnosis mode, the diagnosis mode is selected from the user interface 12, and 420 msec which is increased by 20 msec is set as a new reference timer value by a preset procedure (for example, B5LEF / LOW = 420). Enter). After that, when the diagnostic mode ends, the changed reference timer value (420 m
sec) is the user interface 12 as shown in FIG.
Is stored in the NVRAM 12a. When the power is turned off and on again, the reference timer value of NVRAM12a
And a new timer value table is created. The timer value is adjusted by the above operation.

〔The invention's effect〕

As described above, according to the document pressing control device of the document feeding apparatus of the present invention, a plurality of timer values that define the operation of the document pressing are set for each document size and each document discharge speed, and the timer values are set for the document size and the document discharge speed. Based on this, the corresponding timer value is input to control the document pressing, so that documents of all sizes can be pressed at the appropriate timing without variation, and the documents can be pressed at the appropriate timing according to the discharge speed. I was able to hold down. Further, since the timer value can be adjusted, it is possible to adjust the timing of pressing the document press according to the machine difference of the document feeder.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention. Second
The figure is an explanatory view showing the entire configuration of the copying machine. FIG. 3 is an explanatory diagram showing a system configuration of a copying machine to which the present invention is applied. FIG. 4 is an explanatory diagram showing a hardware configuration by a CPU of a copying machine to which the present invention is applied. FIG. 5 is an explanatory diagram showing the state division of the main system. 6 (a) and 6 (b) are explanatory views showing the configuration of a document feeder of the present invention. FIG. 7 is a diagram for explaining creation of a timer value table according to the first embodiment. FIG. 8 is an explanatory diagram relating to a servomotor, a solenoid, and a timer value. Ninth
FIG. 4 is a diagram for explaining adjustment of a timer value in the first embodiment. FIG. 10 is a block diagram showing a second embodiment of the present invention.
FIG. 11 is a diagram for explaining creation of a timer value table in the second embodiment. FIG. 12 is a view for explaining adjustment of a timer value in the second embodiment. 13 (a) to 13 (d) are explanatory views showing a conventional document alignment mechanism. FIG. 14 is an explanatory view showing a document feeder having a document pressing arm. DESCRIPTION OF SYMBOLS 1… Base machine 2… Platen glass 3… Optical system (scanning exposure device) 4… Sensitive material belt 5… Marking system 6-1… Upper tray 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 37b …… Document size detection sensor 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… CPU for U / I 47… CPU for IEL 53 …… Serial bus 601… Document 602… Document tray 603… Sending paddle 605 …… First drive roller 606 …… Driving roller 607: second drive roller 608: driven roller 609: arc-shaped transport path 610: manual transport path 611: horizontal transport path 612: third drive roller 613: driven roller 615: stop Gate 616... Reversing conveyance path 617... Fourth driving roller 619 .. belt driving roller 620... Driven roller 621... Belt 622... Fifth driving roller 623. Cleaning tape 626 Seventh drive roller 627 Document ejection tray 628 Rubber pad 629 Document holding arm 630 Solenoid 631 Skew roller S ₁ No paper sensor S ₂ Take away sensor S ₃ , S ₄ …… Feed sensor S ₅ …… Register sensor S ₆ 〜 S ₁₀ ...... paper size sensor S ₁₁ ...... discharge sensor S ₁₂ ...... end sensor a ...... document discharge tray b ...... stopper c ...... guide d ...... weight e ...... document pressing arm f ...... rubber pad g ...... solenoid

Claims (5)

(57) [Claims] 1. A document press control device of a document feeder for controlling a document press unit for aligning documents discharged to a document discharge tray after copying is completed, based on a predetermined timer value. First storage means for storing a plurality of reference timer values defining an operation; document size detection means for detecting the size of the document and outputting a document size signal; and storing the reference timer value and the document size signal. On the basis of,
A document pressing control device for a document feeding device, comprising a control unit for controlling the document pressing unit. 2. The document presser according to claim 1, wherein said reference timer value in said first storage means is changed through input means such as a console to adjust said timer value. Control device. A second storage unit for storing an adjustment value as adjustment data for the timer value, wherein the control unit includes a reference timer value stored in the first storage unit; 2. The document pressing control device according to claim 1, wherein the timer value table is created based on the adjustment value stored in the storage unit. 4. The document holding control according to claim 3, wherein said timer value is adjusted by changing said adjustment value of said second storage means via input means such as a console. apparatus. 5. The control means controls the document pressing means in an ADF mode, a DADF mode, a SADF mode, and a 2-UP mode.
5. The method according to claim 1, wherein the operation is performed in a mode, and the operation is stopped at a raised position in other modes.
A document holding control device of the document supply device described in the item.