JPH062540B2 - Document handling device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document handling device that feeds documents one by one to a predetermined position.

2. Description of the Related Art Generally, in an image forming apparatus such as a copying machine, a document handling device for feeding a document to an exposure position may be additionally used.

As such a document handling device, there is a device for separating a large number of documents one by one and feeding them to the exposure position. Conventionally, in such a device, when a document jam occurs in the feeding path, the operator may reset the jam by removing the jammed document from the inside of the device, and the operator again removes the removed document. It was possible to restart by stacking on multiple originals on the original placing table.

However, when only one sheet of jammed document is overlaid on a plurality of documents and paper feeding is restarted, skewing or the like is likely to occur and there is a high possibility of jamming again.

The present invention has been made in view of the above points, and does not allow resumption by simply pulling out a jammed document at the time of document jamming, and it is possible to prevent a document conveyance failure from occurring again after the document is jammed. To provide.

That is, according to the present invention, a document storage unit for stacking a plurality of documents,
First detection means for detecting the presence / absence of a document in the document storage section, transporting means for transporting the documents stacked in the document storage section one by one to a predetermined position, and from the document storage section to the predetermined position Second detection means for detecting the presence or absence of a document in the document conveyance path, jam detection means for detecting a jam of the document based on the output of the second detection means, and conveyance of the jam when the jam detection means detects a jam. A document having a control unit that enables the operation of the transport unit to be restarted when the operation of the unit is stopped and both the first detection unit and the second detection unit detect a document. A handling device is provided.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, in which A is a document feeder unit (hereinafter referred to as AF) for separating and feeding one document from a plurality of documents, and B is an exposure of the document. A document setter unit (hereinafter referred to as DF) for feeding a position, C is a copying machine main body. The AF part and the DF part are configured to be separable, and
A mode in which documents are fed by connecting the F section and the DF section (hereinafter A
It is possible to operate in a mode (hereinafter referred to as DF mode) and a mode in which the AF unit is separated and the DF unit alone feeds a document (hereinafter referred to as DF mode). Also, D and E are DF in ADF mode, respectively.
It is an operation display unit having a start key or a mode key in the mode and a jam display lamp. In the ADF mode, the operation display section E is covered with a cover as described later and cannot be operated.

2-1 and 2-2 are cross-sectional views when operating in the ADF mode and the DF mode, respectively, FIG. 3 is a perspective view of the AF section, and FIG. 4 is a perspective view of the DF section.

First, the configuration of the device in the ADF mode will be described. In FIGS. 2A and 2B, reference numeral 1 denotes a horizontally placed document stacking tray on which the surface to be copied of the document is placed on the lower side. A pickup roller 2 moves downward when the pickup solenoid 11 (SL1) is turned on and picks up a document on the document placing tray 1. When the AF drive motor 13 (M2) is operating, the pickup roller 2
Is transmitted in the clockwise direction via the separation belt (upper) 3. The separation belt (upper) 3 and the separation belt (lower) 4 are kept with a gap enough to send one original,
When the AF drive motor 13 (M2) is in operation, the AF drive motor 13 rotates in the direction of the arrow in the drawing, and one original is separated and fed. When the document is fed into the separation belts (upper) 3 (lower) 4,
The solenoid 11 is turned off and the pickup roller 2 moves upward. When the belt opening solenoid 12 (SL2) is turned on while the motor 13 is rotating, the half-rotation control ring 8 half-rotates, and the cam 7 further rotates, so that the clutch pawl 6 lowers in the direction of the arrow to drive the motor 13. The transmission to the separation belts 3 and 4 is cut off, and the release shaft arm 5 pushes down the separation belt (lower) 4 to form a gap between the separation belts (upper) 3 and (lower) 4. When the belt opening solenoid 12 is turned off while rotating the motor 13 thereafter, the half-rotation control ring 8 is half-rotated and the cam 7 is returned to its original position, so that the clutch pawl 6 is lifted and the motor 13 is rotated. While transmitting to the separation belts 3 and 4, the open shaft arm 5 is lifted to lift the separation belt (lower) 4, and the gap between the separation belts (upper) 3 and (lower) 4 is returned to the original position.

The drive system of the AF unit is the same system for both the pickup roller 2 and the separation belts 3 and 4, and the rotational force of the drive motor 13 (M ₂ ) is transmitted to each unit. Further, 9 is an AF document sensor (S1) for detecting that the document is set on the document stacking tray 1, and 10 is a timing sensor (S2) for detecting that the document has entered the separation belt.

Next, the DF section will be described. In FIGS. 2A and 2B, 20 is a roller for pressing the document sent from the AF section, and is a document pressing solenoid 32 (SL).
When 3) is turned on, hang down to hold the document. Reference numeral 21 denotes a conveyance roller that conveys the document sent from the AF unit. The full-face belt 23 is wound around the drive roller 22 and the turn roller 24, is pressed against the document platen glass 37, and conveys the document by frictional force. The discharge roller (1) 25 discharges the copy-finished document on the document platen glass 32, and the discharged document is turned by the turn unit 2.
The sheet is discharged along the sheet 6 and is stacked on the sheet discharge tray 28 by the discharge roller (2) 27. Reference numeral 29 is a DF document sensor (S3) for detecting the document sent from the AF unit, and 30
Is an entrance sensor (S4) for detecting the leading edge and the trailing edge of the original, and 31 is a paper ejection sensor (S4) for detecting when the original is ejected.
5). The drive system of the DF section includes a press roller 20, a conveyance roller 21, a belt drive roller 22, and a turn roller 2.
4, the discharge roller (1) 25, and the discharge roller (2) 26 have the same system, the peripheral speeds are all equal, and the rotation of the drive motor 34 (M1) is transmitted to each part by the clutch 35 (CL). It The brake 36 (BK) is turned on when the document is set at a predetermined position on the document platen glass 37 and stopped. Further, the clock generator 33, which is generated in synchronization with the rotation of the drive motor 34 (M1), controls the operation described later.

Further, the conveyance speed of the AF section is configured to be slower than the conveyance speed of the DF section, and the separation of the original document is made good.

Reference numeral 39 denotes a start switch on the operation display section D (FIG. 1). By pressing this switch, the internal lamp 41 is turned on and the feeding of the original document is started. Reference numeral 44 is a cover for covering the operation display portion E so that the operator does not operate it by mistake in the ADF mode.

The open / close cover 28 of the turn portion 26 rotates about the axis X. Then, by opening the opening / closing cover 28, it is possible to discharge the document from the paper discharge roller 25 to the left side.

As described above, in this embodiment, since there are two discharge paths, the discharge sensor 31 is provided immediately before the branch point, and when any discharge path is selected, this sensor performs discharge check.

Further, the DF section is configured to be opened and closed separately from the AF section, and a DF door switch (described later) including a micro switch is provided to detect the open / closed state.

Next, FIG. 2-2 shows the configuration of the apparatus in the DF mode.
Those having the same numbers as in FIG. 2-1 are the same components,
Reference numeral 50 is an entrance tray for stacking documents one by one. 40
Is a DF mode key in the operation display section E (FIG. 1). By pressing this key, the DF mode is selected, and the internal lamp 43 lights up to display it.

Next, the operation of the above configuration will be described. First, the ADF mode will be described. When a document is placed on the document tray 1, the AF document sensor 9 senses the document. And AD
When the F start switch 39 is turned on, the lamp 41 is turned on, the solenoid 11 is energized, and the pickup roller 2 is lowered. After a lapse of a certain time after energizing the solenoid 11, the AF motor 13 rotates and the uppermost original among the loaded originals starts to be conveyed. When the AF timing sensor 10 detects the front end of the document conveyed between the separation belts 3 and 4, the solenoid 11 is de-energized and the pickup roller 2 moves upward. Then, the document is conveyed from the AF section to the DF section. When the leading edge of the document is detected by the DF document sensor 29, the solenoid 1 is detected in the AF section.
2 is energized to push down the separation belt (lower) 4. or,
The operation of the separation belts 3 and 4 is stopped. After a lapse of a certain time after energizing the solenoid 12, the AF motor 13 stops and the operation of the AF unit is stopped.

In the DF section, when the DF document sensor 29 detects the leading edge of the document, the solenoid 32 is energized, and the pressing roller 20 moves downward to hold the document. Then, when the DF motor 34 and the clutch 35 are turned on, the DF portion pressing roller 20, the conveying roller 21, the belt driving roller 22, the turn roller 24, and the carry-out rollers 25 and 26 rotate. As a result, the document starts to be conveyed at a faster speed than the AF section. When the document passes the conveyance roller 21, the leading edge of the document is detected by the entrance sensor 30, and from this point, the clock generator 3
The clock pulses generated by 3 are counted. or,
The solenoid 32 is de-energized and the pressing roller 20 moves upward. Next, the original enters between the full-belt belt 23 and the original platen glass 37, and is conveyed by the full-belt 23. When the entrance sensor 30 detects the trailing edge of the document,
If there is a document to be fed next in the AF section, the feeding of the next document is started as described above. This document is a DF document sensor 29
Waiting at the position. When the number of pulses generated by the clock generator 35 reaches a predetermined value, the DF motor 34 and the clutch 35 are de-energized. At the same time, the brake 36 is energized. Then, a copy start signal is sent to the main body of the copying machine to start the copying operation. The brake 36 is de-energized after a certain period of time.

When the copying operation of the main body is completed, the DF motor 34 rotates, the clutch 35 is energized, and the full-face belt 23 starts to discharge the exposed document. And the discharge surah 25, 27
Thus, the document is discharged onto the discharge tray 28.

When a certain period of time elapses after the leading edge of the document is detected by the discharge sensor 31, the DF motor 34 and the clutch 35 are de-energized. Then, when the DF document sensor 29 detects the document, the solenoid 32 is energized, and the next document is fed in the same procedure as described above.

Next, the operation in the DF mode will be described. When the DF mode switch 40 is turned on, the DF mode is selected and the internal lamp 43 is turned on. When the document is placed on the entrance tray 50 and inserted under the pressing roller 20, the solenoid 32 is energized after the DF document sensor 29 detects the document, and the pressing roller 20 descends. Thereafter, the document is fed to the exposure position in the same procedure as described above, and is discharged after the exposure is completed.
Then, when the DF document sensor 29 detects the document after a predetermined time has passed after the document sensor detects the leading edge of the document, the document is fed again.

FIG. 5 is a block diagram showing a control circuit for performing the above-mentioned operation, which is mainly composed of a well-known one-chip microcomputer (hereinafter referred to as μCOM) 43 having a built-in ROM, RAM and the like. μCOM43 interrupt terminal INT
A pulse signal from the clock generator 33 generated when the DF motor 34 rotates is waveform-shaped by a capacitor and input to the. At the input ports P _{0 to} P ₄ , the AF document sensor (S ₁ ) 9, the timing sensor (S ₂ ) 10, the DF document sensor (S ₂ ) 29, the entrance sensor (S ₄ ) 30, and the paper discharge sensor (S _{5) are provided.} ) 31 receives the original detection signal. The signal from the ADF start switch 39 in the ADF mode and the signal from the DF mode switch 40 in the DF mode are input to the input port P ₅ . Also, input port P ₆
A state detection signal from a micro switch (MS ₁ ) 38 that operates in response to opening and closing of the DF section is input to. Further, the switching signal from the switch 42 for switching between the ADF and the DF is input to the input port P ₇ . The changeover switch 42 is provided on the printed circuit board on which the control circuit is provided. In addition, the DF start signal DFS is input from the main body of the copying machine to the input port P _8.
Input by TART. This signal is output when the final exposure for copying is completed on the main body side.

The ports F _{0 to} F ₉ are output ports, and are used to light the start lamp 41 in the ADF mode and the DF mode lamp 43 in the DF mode from the port F ₀ according to the input signal to the input port P ₅ . A lighting signal is output via the driver D ₀ . Further, drive control signals for turning on the pickup solenoid 11, the belt opening solenoid 12, and the document pressing solenoid 32 are output from the ports F _{1 to} F ₃ via the drivers D _{1 to} D ₃ . Also, from the ports F _{4 to} F ₇ , the AF drive motor (M ₂ )
13, drive control signals for the DF drive motor (M ₁ ), the clutch 35, and the brake 36 are output via the drivers D _{4 to} D ₇ . Further, from the port F _8, jam indicator lamp 44 or the inner operation display unit D or E (FIG. 1) 45
, And a copy start signal COPYSTART is output from the port F ₉ to the main body of the copying machine through the drivers D _{8 to} D ₉ .

Reading these input signals or turning the load on / off is μ
It is controlled according to the program stored in the ROM in the COM 43.

Figures 6-9 are flow charts of this program,
FIG. 10 is a timing chart in the case of feeding two originals in the ADF mode, and FIG. 11 is a timing chart in the case of feeding two originals in the DF mode. The above description will be described in more detail with a focus on the flowchart.

FIG. 6 is a flowchart showing the main routine.
First, in step 100, it is determined whether or not the device is a jam, and if it is not a jam, the changeover switch 42 is checked in step 101 to determine whether it is the ADF mode or the DF mode. If it is the ADF mode, the AF subroutine shown in FIG. 9 is executed in step 102. If it is the DF mode, the process proceeds to step 103. In step 103, the DF subroutine shown in FIG. 8 is executed. And step 1
At 04, 1 is added to the contents of the timer described later. Step 1
When a clock pulse is input to the interrupt terminal INT at 05, 1 is added to the content of the counter described later.

If it is judged as a jam in step 100, JAMA or JAMB shown in FIG. 9 is executed in step 106, and the process proceeds to step 104.

In the present embodiment, when the AF subroutine or the DF subroutine is being executed, the main routine is returned to in the standby state.

Next, the AF subroutine will be described with reference to FIG.
In step 1, the document is placed on the document stacking tray 1 and it is determined whether or not the AF document sensor 9 detects it.
Repeat reading from ₀ until it is detected. When a document is placed, the process proceeds to step 2, and whether the start switch 39 is turned on is read from the input port P ₅ , and repeatedly monitored until it is turned on. When turned on, a lamp lighting signal is output from the output port F ₀ . This allows the lamp 41
Lights up to inform the operator that the ADF has started operating. Then, in step 3, the pickup solenoid 11 is turned on and the belt opening solenoid 12 is turned off by the signals from the output ports F ₁ and F ₂ . As a result, document feeding is started. Further, the pickup holding timer T ₁ set in a predetermined area of the RAM in the μCOM 43 is started to measure a predetermined time. After the timer T ₁ ends in step 4, the AF drive motor 13 is turned on at the same time. The above-mentioned timer T ₁ determines the interval from when the pickup roller 2 is lowered by its own weight when the pickup solenoid 11 is turned on and is pressed against the document surface until the AF motor 13 is turned on and the document is fed. When the timer T ₁ is not provided, the feeding is suddenly started when the pickup roller 2 is on the original surface, and it is possible to prevent problems such as skew feeding and double feeding. Further, when the timer T ₁ ends, the pickup delay JAM timer T _J1 is started.

Next, in step 5, until the timer T _J1 described above expires, A
If the AF timing sensor 10 cannot detect a document before the timer T _J1 expires, the F timing sensor 10 is continuously monitored and it is considered that the pickup has failed, and the pickup delay JAM is taken to the JAMB routine. When the AF timing sensor 10 detects a document, it is determined that the pickup is normally performed, the pickup solenoid 11 is turned off, and the pickup roller 2 is lifted.

At the time when the above-mentioned document is detected by the AF timing sensor 10, the document has been carried into the gap between the separation belt (upper) 3 and the separation belt (lower) 4, and is conveyed by the separation belt (upper) 3. Therefore, the conveyance by the pickup roller 2 described above is unnecessary. Therefore, the pickup solenoid 11 is turned off and the pickup roller 2 is separated from the document surface. Further, the separating belt (lower) 4 has an effect of preventing double feeding of the original document. As described above, the pick-up roller 2 conveys at least one document from the upper side, and even if there is a double feed, the next separation belt (lower) 4 reversely conveys the original so that the separation effect is surely improved. The separation belt (bottom) 4
If the pickup roller 2 still conveys the original document when separating the sheet, the pickup roller 2 will be separated from the original surface because the separation will be disturbed.

Next, at step 6 when the AF timing sensor 10 normally detects the document, the AF retention JAM timer T _J2 is started, and the DF document sensor 29 is continuously monitored until the timer T _J2 expires. _{If the} DF document sensor 29 cannot detect the document before the end of _J2, it is considered that a separation error has occurred and the document remains on the separation belt portion, and AF jam JAM proceeds to the JAMB routine. If the DF document sensor 29 detects a document, it is determined that the document is normally separated, and the process proceeds to the next step.

When the DF document sensor 29 is normally detected in step 7, the belt opening solenoid 12 is turned on to perform the belt opening operation, and the conveyance of the document in the AF section is stopped. Further, as will be described later, the control of the DF section is started by turning on the DF document sensor 29. Further, at the time point, the belt opening operation timer T ₂
To start. Next, in step 8, the timer T ₂ is waited until it finishes, and when it finishes, the separation belt opening operation is performed by the rotation of the AF drive motor 13, the separation belt (lower) 4 is pushed down, and the separation belt (upper) 3 and ( A gap is formed between the lower) 4 to prevent it from interfering with the transport of the DF described later. The timer T ₂ is set to a time sufficient to cause the separation belt opening operation. When the timer T ₂ ends, the AF drive motor 13 is turned off, and the process proceeds to the next. A in this state
F becomes a standby state, and waits until an AF operation command described later is set in step 9. When set, the next AF operation starts.

If the AF operation command is reset in step 10 and it is checked whether the AF document sensor 9 detects the document, that is, whether the next document is placed on the document stacking tray 1, the above-described steps are performed. Go to 3. In step 3, the belt opening solenoid 1 is used to close the separation belt (lower) 4 which is in the open state described in step 8 above.
By turning off 2 and turning on the AF drive motor 13 in step 4, the separation belt (lower) 4 is lifted before the next original reaches the separation belt, and the next original is conveyed by the separation belt. It goes smoothly. If the AF document sensor 9 does not detect the document in step 10, the belt opening solenoid 12 is turned off, the AF driving motor 13 which is once stopped is turned on, and the belt closing operation timer T ₃ is started in step 11. Let At step 12, the AF drive motor 13 is turned off after waiting for the timer T ₃ to end. By this operation, the separation belt (lower) 4 is returned to its original position and the separation belt portion is closed. Next, the AF operation is completed in this state, and the DF
After the operation is completed, that is, the original conveyed to the DF section is normally placed on the original platen glass 37, the copying operation of the main body of the copying machine ends a predetermined number, and the original is DF.
After being discharged from the lamp, the lamp 41 is turned off, the operator is informed that the ADF operation is completed, the operation returns to START, the initial state is set, and the operation waits in step 1.

Next, the DF subroutine will be described with reference to FIG.
First, in step 14, the signal from the change-over switch 42 is read from the input port P ₇ to determine whether the mode is the ADF mode or the DF mode. In the DF mode, it is determined whether or not the DF mode switch 40 is turned on by the input port P ₅
Read more and monitor until turned on. When turned on, a lamp lighting signal is output from the output port F ₀ . As a result, the lamp 43 is turned on to inform the operator that the DF mode is set. Then, in step 15, whether or not the DF document sensor 29 detects the document is read from the input port P ₂ and monitored until it is detected.

In the ADF mode, the document conveyed from the AF section is D
When the F document sensor 29 is turned on, in the DF mode, the document is placed on the entrance tray 50 to turn on the DF document sensor 29 to start the DF unit, and the document pressing solenoid 32 is turned on to cause the leading edge of the document. Hold down.
Then, the document pressing timer T ₅ is started, and when it finishes, the input port P ₈ is checked to monitor whether or not the DF state signal is input. This DF state signal is output when the copying operation is completed on the copying machine main body side, and is always output from the copying machine main body side except during the copying operation. When the DF start signal is input, the copy start signal output from the output port F ₉ to the copying machine main body is turned off. Then, the DF drive motor 34 and the clutch 35
By turning on, the front surface belt 23 and the document pressing roller 2
0, the conveyance roller 21 is rotated to convey the document. At the same time, a clock synchronized with the transport speed is generated from the clock generator 33, which is input to the interrupt terminal INT of the μCOM 43, and advances each counter described later provided in a predetermined area of the RAM of the μCOM 43 one by one.

Next, at step 17, the conveyance delay JAM counter CNJ1 is started, and it is continuously monitored whether the entrance sensor 30 detects the leading edge of the document until the counter CNJ1 is finished. If the entrance sensor 30 cannot detect until the end of the counter CNJ1, it is considered that a conveyance error has occurred and the conveyance delay J
Go to JAMB routine as AM. If the leading edge of the paper is detected by the entrance sensor 30, it is normal and the process proceeds to the next step.

When the leading edge of the paper is detected by the entrance sensor 30, the document pressing solenoid 32 is turned off in step 18. At this time, the document is subjected to the carrying force by the carrying roller 21, and the pressing roller 20 is moved upward so as not to obstruct the carrying of the document by the carrying roller 21 and the entire surface belt 23.

Further, in order to stop the original at a predetermined position on the original platen glass 37, the original set counter CN1 is started after the entrance sensor 30 detects the leading edge of the original.

Next, in step 19, the trailing edge of the document is continuously monitored by the entrance sensor 30 until the counter CN1 is finished.
When the rear end of the document is detected, that is, when the document detection signal from the entrance sensor 30 is turned off, the AF operation command is set and the AF operation is instructed to start the AF operation in step 9 described above. The operation is performed, and the feeding of the next original is started. When the counter CN1 ends, that is, when the document reaches a predetermined position (exposure position) on the document platen glass 32, the DF drive motor 34,
The clutch 35 is turned off, and the brake 36 is turned on to further improve the stop accuracy, so that the entire belt 23 is stopped.
At this point, the next original has not reached the DF section. Next, in step 20, when the counter CN1 is finished, it is checked whether or not the DF document sensor 29 and the entrance sensor 30 detect the document, and if they are detected, it is determined as the conveyance retention JAM and the process proceeds to the JAMA routine. If is not detected, a copy start signal is output to the main body of the copying machine as a copy start command, and the copying machine starts the copying operation.

Next, at step 21, the brake on timer T ₄ is started, and the end of the timer T ₄ is checked, and when it is finished, the brake 36 is turned off.

Next, at step 22, it is checked whether or not a DF start signal is input, or whether or not the DF document sensor 29 detects a document sent from the AF section. During this period, the copying machine body is performing the copy operation for the set number of sheets. A
In the DF mode, the next document is fed from the AF unit,
In the case of the DF mote, the next document is set on the entrance tray 50, and when the DF document sensor 29 detects the document, the process proceeds to step 15, and when the DF start signal is input, the DF operation as described above is started. If the next document is not detected by the DF document sensor 29, the DF start signal is input and the process proceeds to step 23. Then, the copy start signal is turned off, the DF drive motor 34 and the clutch 35 are turned on, and the original is sent from the original platen glass 37 to the paper discharge path. Further, the discharge delay JAM counter CNJ2 is started. In step 24, it is checked whether the paper discharge sensor 31 detects the leading edge of the document until the counter CNJ2 is finished. If the leading edge is not detected, the sheet discharge delay JAM is taken and the routine proceeds to the JAMB routine. Proceed to. In step 25, the discharged paper retention JAM counter CNJ3 is started, and the completion thereof is checked, and when completed, the process proceeds to the next step. The counter CNJ3 is set so that it takes a sufficient time for the trailing edge of the document to be discharged from the discharge roller 2 (27) after the leading edge of the document is detected by the discharge sensor 31. After the counter CNJ3 is finished in step 26, the discharge sensor 3
Detect the trailing edge of the document in 1 and if there is, hold the discharged paper JAM
As a result, the JAMA routine is proceeded to, and if not, the document is normally ejected, and the DF drive motor 34 and the clutch 3
Turn off 5 and return to step 15.

Next, the JAM routine will be described with reference to the flowchart of FIG. In the JAMA routine, the DF retention JAM is checked, the full load is stopped in step 27, the brake 36 is turned on, and the brake on timer T ₄ is started. In step 28, the brake 36 is turned off after the timer T ₄ ends, and the jam lamp 44 is turned on in the ADF mode and the jam lamp 45 is turned on in the DF mode. The jam in this case is that the original document stays at any one of the position of the paper discharge sensor 31, the entrance sensor 30, the DF document sensor 29, and the AF timing sensor 10. At step 29, the original document is pulled out from the sensor position. When each sensor detects the fact, the process proceeds to step 32. In this way, by turning on the brake 36 when the full load is stopped, it is possible to surely stop the document in the DF staying JAM at that position, and prevent the document from being damaged. Further, when the document moves due to the inertia of the transport system, the document detected by each sensor comes out of the sensor after the jam, and the jam reset is performed only by pulling out the document as in the present embodiment, Prevents automatic reset due to motor inertia.

Further, in the JAMB routine, AF retention, delay JAM, and DF delay JAM are checked, the full load is stopped in step 29, and the jam lamp 44 is turned on in the ADF mode and the jam lamp 45 is turned on in the DF mode. In this case, the original is not placed on each sensor.
The entire F is once opened, the MSI 38 is turned off, the original is taken out, and the DF is closed again (the MSI 38 is turned on), and the process proceeds to step 32.

In step 32, it is checked whether it is the ADF mode or the DF mode. In the ADF mode, all the originals are taken out from the original stacking tray 1, and the AF original sensor 9 detects the absence of the original to perform the jam reset, and the jam lamp 44 is turned off. In the DF mode, the jam lamp 45 is turned off as it is.

As described above, in the ADF mode, the AF original document sensor 9 after jamming is performed.
Is performing a jam reset by detecting the absence of a document, and the operator can perform a jam reset by pulling out the remaining document in order to realign the jam document with the remaining document.

The timer and the counter in the above embodiment are μCOM.
It is a software program set in a predetermined area of the RAM 43.

Effects As described above, according to the present invention, when a jam is detected by the jam detecting means, the operation of the document conveying means is stopped, and both the document storage section and the document conveying path are not documented. Detecting By allowing the operation of the document feeder to resume, the document is pulled out from the storage section,
The original conveyance can be resumed by realigning with the jammed original, and it is possible to prevent the defective conveyance such as skew feeding, double feeding, and jamming of the original after the restart from easily occurring again.

[Brief description of drawings]

FIG. 1 is a perspective view of a document handling device according to the present invention, FIG.
1 is a sectional view showing the structure in the ADF mode, FIG. 2-2 is a sectional view showing the structure in the DF mode, FIG. 3 is a perspective view showing the structure of the AF section, and FIG. 4 is a structure of the DF section. 5 is a block diagram showing a control section of the document handling apparatus according to the present invention, FIGS. 6 to 9 are flowcharts of programs stored in the μCOM, FIG. 10 is a timing chart in the ADF mode, FIG. 11 is a timing chart in the DF mode. In the figure, 1 is a document stacking tray, 2 is a pickup roller,
3, 4 are separation belts, 9, 10, 29-31 are sensors,
11, 12, 32 are solenoids, 13 is an AF drive motor, 20 is a pressing roller, 21 is a conveying roller, 22 is a belt driving roller, 23 is a full belt, 25 and 27 are discharging rollers, 28 is a discharging tray, and 33 is 33. Clock generator, 34
Is a DF drive motor, 35 is a clutch, 36 is a brake,
38 is a DF door switch, 43 is a microcomputer,
50 is an entrance tray.

Claims (1)

[Claims] 1. A document storage unit for stacking a plurality of documents, a first detection unit for detecting the presence / absence of a document in the document storage unit, and one document stacked in the document storage unit to a predetermined position. Conveying means for conveying, second detecting means for detecting the presence / absence of a document in the document conveying path from the document storing section to the predetermined position, and detecting a jam of the document based on the output of the second detecting means. A jam detecting unit, and when a jam is detected by the jam detecting unit, the operation of the conveying unit is stopped, and the first detecting unit and the second detecting unit.
An original handling apparatus, comprising: a control unit that enables the operation of the conveying unit to resume when both of the detection units detect no original.