JPS6022127A - Preventing method of leaving of original of automatic original feeder - Google Patents

Abstract

PURPOSE:To prevent an operator from leaving an original on an exposure platen by generating warning in manual original replacement mode unless an original pressure plate is open for a specific time. CONSTITUTION:When an automatic original feed mode is selected and a sheet original is placed on a supply tray 20, a belt mechanism on the reverse surface of the original pressure plate 3 feeds the sheet original onto an exposure platen 2 automatically and a copy is taken. At this time, the original pressure plate 3 is held closed. When a manual original replacement mode is selected, the original pressure plate 3 is opened and closed manually and an original is placed on the exposure platen and taken away. It is judged that the original is left unless the original pressure plate 3 is opened for the specific time in manual original replacement mode, and warning of that is generated. When, however, the switching to the automatic original feed mode is performed, the original is discharged automatically, so no warning is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing document forgetting in an automatic document feeder for automatically feeding a document onto a document table at the top of a copying machine during copying operations.

In a general copying machine, when copying, the operator first opens the document holding plate that covers the top of the document table, places the document in a predetermined position on the document table, closes the document press, and places the document on the document table. The copying machine is operated while the copying machine is held between the paper and the document holding plate, and a copying operation is performed.

In such conventional copying machines, when starting the copying machine, there is a certain amount of waiting time (time until the heat roller for fixing is heated to a certain temperature that does not interfere with the fixing function).
It can only be driven after passing through this process.

Therefore, if the waiting time is long, especially when using a copy after a long period of non-use, there is a disadvantage that the efficiency of the copying operation decreases.1. The copying machine automatically copies after a waiting period has elapsed, and at least the first original is automatically copied while the operator is away from the copying machine and doing other work. For example, improvement in work efficiency is inevitable.

Furthermore, in conventional copying machines, it is necessary to open and close the document holding plate each time the document is replaced, and the wind pressure caused by opening and closing the document holding plate causes the document to shift from its predetermined position, making it difficult to obtain the desired document image. There were many inconveniences that led to failure.

Such inconveniences can be solved by providing a device in which an operator can properly set a document in a copying machine and then the copying machine automatically transports the document to a predetermined position without opening the document table. Therefore, the inventor of the present invention exchanged the original and transported it to a predetermined position without opening and closing the original holding plate, and the operator inserted the original into a predetermined supply port and operated the appropriate switch. When the waiting time on the copying machine side is completed, the original is automatically fed into the specified position on the copying machine, and after the copying process for that original is completed, the original is automatically ejected. The automatic document feeder is designed to prepare for the insertion of the next document, and includes a document supply section that feeds the document one sheet at a time onto the document table, and a document feeding section that feeds the document one sheet at a time onto the document table, and a document feeding section that feeds the document one sheet at a time onto the document table. A device in which a document feeder is attached to a document table so as to be openable and closable, and the document feeder has a belt feeder that conveys the document to a position, and a document ejector that ejects the document sent from the belt feeder to a document eject tray. developed. Details of this device will be described later.

In the case of this device, the document feeder can also be used as a conventional document holding plate, and by opening and closing the document feeder, documents can be replaced by manual operation (manually feeding), so automatic document feeding is possible. Difficult and hard manuscripts,
It has the advantage that even thick originals can be freely copied.

On the other hand, when performing a so-called manual operation in which the document holding plate (or the document feeder as mentioned above) is opened and closed to exchange originals, the mistake of leaving the last original under the closed document holding plate can be completely eliminated. I can't.

In order to prevent this, conventional copying machines take measures such as issuing an alarm when the presser plate is closed for a certain period of time after the completion of a copying operation to prevent documents from being left behind.

However, in the case of a copying machine equipped with an automatic document feeder as described above, the document is automatically ejected in the automatic document feed mode, so there is no need to issue an alarm after copying is complete. In the case of manual document exchange mode, the above-mentioned procedure for preventing document forgetting is required, and it is necessary to use different types of processing depending on the mode.

The present invention was developed based on such requests.
The main points are: a document feeding section that feeds originals one by one onto the document table; a belt feeding section that conveys the fed documents to a predetermined position on the document table; and the belt feeding section. In a document forgetting device in an automatic document feeder, which includes a document feeder having a document ejecting section for ejecting a document fed from a document feeder to a document ejecting tray, and a document feeder which is attached to a document table so as to be openable and closable, a manual document exchange mode is provided. When the copying operation is completed, it is determined whether the mode is automatic document feeding mode or not, and if the mode is manual document exchange mode, if the document feeding device remains open for a predetermined period of time, the document forgetting procedure is executed. In addition, in the case of automatic document feeding mode, the document forgotten processing procedure is not executed.

Embodiments embodying the present invention will be described below with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a perspective view of the entire copying machine having an automatic document feeder to which the document forgetting prevention method according to an embodiment of the present invention can be applied (the document feeder is shown in an open state), and FIG. is a schematic side sectional view of the document feeder in a closed state;
FIG. 3 is a plan view showing the document feeding section of the document feeding device, FIG. 4 is a side sectional view of the document feeding section, and FIG. 5 is a side sectional view showing the structure of the document feeding section and belt feeding section. FIG. 6 is a front view of the operation panel for the operator to operate the document feeder, FIG. 7 is a block diagram showing the signal transmission system in the control circuit used to implement the control method according to the present invention, and FIG. 12 through 12 are flowcharts showing a control procedure according to an embodiment of the present invention.

First, an example of an automatic document feeder to which the present invention can be applied and a copying machine equipped with the same will be schematically explained using FIGS. 1 and 2. In these figures, the entire copying machine is indicated by l, and this copying machine l has a document feeder, indicated by 3, on a document table 2 made of a transparent plate, etc., on which a document is placed during copying work. , an optical system built into the cover 4 and generally indicated by 5, a light source 6 that moves along the document table 2, and an image of the document that passes through the optical system 5 as the document surface is exposed and scanned by the light source 6. a photoreceptor 7 that converts the electrostatic latent image into an electrostatic latent image; a developing device 8 that applies toner to the electrostatic latent image formed on the surface of the photoreceptor 7 and develops it into a toner image;
1 or a plurality of paper feed cassettes 9a+9b... A transport path 11 transports the copy paper taken out from the paper feed unit 9 to the paper output tray 10 via the surface of the photoreceptor 7, and a transfer path in this transport path. A transfer unit 13 that transfers the toner image on the photoreceptor 7 onto copy paper by a corona discharger 12, and a heat unit that heats the copy paper to which the toner image has been transferred and has been peeled off from the photoreceptor 7 to fix the toner image on the copy paper. Roller 15. The main components include a fixing device 14 made up of a pressure roller 16 and the like.

Next, the automatic document feeder 3 will be explained. The automatic document feeder 3 has its upper surface covered by a series of covers 17 as a whole, and has a drive section 1 that incorporates a motor M, etc., which will be described later.
8 and a conveyor section 19 that accommodates a belt 67, which will be described later, which is thinner than the drive section 18, and is configured by a hinge structure (not shown) attached to the drive section 18 side (at the rear of the top surface of the copying machine body). , is swingably attached to the second surface 20 of the main body of the copying machine, and this opening/closing operation opens and closes the document feeder 3 with respect to the document table 2.

As shown in FIGS. 3 and 4, the drive unit 18 accommodates a motor M that drives the automatic document feeder 3 according to the conditions of the copying machine main body. The belt 23 is wound around the pulley 22 which is secured by means of the above means, and is wound around the pulley 26 which is secured to the input shaft 25a of the electromagnetic clutch 24.

The motor M and pulleys 22 and 26 are attached to a bottom plate 69 attached to the cover 17, and this bottom plate 69
The gear 27 fixed to the output shaft 25I of the electromagnetic clutch 24 attached to the electromagnetic clutch 24 meshes with the gear 30 fixed to the input shaft 29 of the electromagnetic brake 28 attached to the electromagnetic clutch 24, and the output is coaxial with the gear 27. The slit plate "31" attached to the shaft 25 is approximately disk-shaped, and has a large number of slits 32 (shown in the fourth figure) at equal pitches on its outer circumference, and constitutes a pulse generator with the slit portions sandwiched therebetween. By disposing the photo-interrupter 33, electrical pulses corresponding to the number of slits 32 passing through the photo-interrupter 33 are induced in the photo-interrupter 33,
The rotation speed of motor M is detected.

A pulley 35 fixed to the output shaft of the electromagnetic brake 28
The belt 36 wrapped around the belt 36 is attached to a belt drive shaft 39 perpendicular to the direction of conveyance of the document shown by an arrow 38 in the conveyance section 19.
The tension pulley 42 is wound around a pulley 41 coaxially fixed to the shaft end 40 of the shaft end 40, and the pulley 43 is coaxial with the pulley 41 fixed to the shaft end 40.
The belt 47 wrapped around the feed roller shaft 44
A freely rotatable intermediate pulley 48 passes over the circumference of a pulley 45 attached to the shaft end of the pulley 45 via a clutch 53 (described later).
It is an endless belt that returns to a pulley 43 after wrapping around the belt, and 46 is a tension pulley for this belt 47.

The intermediate pulley 48 is integrated with a gear 49, and this gear 49
is connected to the shaft end of a supply roller shaft 51 (parallel to the belt drive shaft 39), which is disposed on the opposite side of the belt drive shaft 39 with the feed roller shaft 44 interposed therebetween, via an intermediate gear 50 and a clutch 65, which will be described later. It meshes with a gear 52 mounted coaxially.

Further, the shaft end of the feed roller shaft 44 has the aforementioned boo I745.
At the same time, a spring clutch 53 is attached, and the rotation of the pulley 45 is transmitted to the feed roller shaft 44 via this spring clutch 53.

A solenoid SOL+ (
The actuator (shown in FIG. 7) is connected to a lever 58 via a link (not shown), and the lever 58 swings in response to the operation of the solenoid 5OLl.
meshes with the model wheel 54 of the spring clutch 53,
Or, by detaching, the mold wheel 54 is rotated and braked, and the rotation of the feed roller shaft 44 is turned on and off.

Furthermore, the actuator of a solenoid 5QL2 (shown in FIG. 7) provided on the bottom plate 69 opposite to the solenoid 5OLI is connected to a lever 62 that swings through another link or the like, and the locking piece 62a of the lever 62 is connected to the Supply roller shaft 5
The spring clutch 65 is attached to the shaft end of the spring clutch 65 coaxially with the gear 52, and the spring clutch 65 engages with or disengages from the claw portion 64 of the cam 63.

The gear 52 and the supply roller shaft 51 are connected via a spring clutch 65, and the locking piece 6 of the lever 62
2. By engaging the claw portion 64 of the cam 63 to prevent rotation of the cam 63, transmission of the rotation of the gear 52 to the supply roller shaft 51 is prevented.

As shown in FIG. 2, between the belt drive shaft 39 and the driven shaft 66, which is disposed parallel to the belt drive shaft 39 and on the downstream side in the document conveyance direction indicated by the arrow 38, there is a wide white document conveyor. A belt 67 is attached thereto, and a plurality of pressing rollers 68 for pressing the belt 67 against the document table 2 are attached to the intermediate portion thereof.

The belt drive shaft 39, the feed roller shaft 44, the supply roller shaft 51, the pressure roller 68, and the discharge roller described later are connected to a bottom plate 69 attached to the cover 17 (see FIG. , 5th
(see figure) via appropriate bearings, etc.

A plurality of supply rollers 70, which are a type of fan-shaped cam, are attached to the supply roller shaft 51 as shown in FIG. It is composed of a large diameter portion 708 and a small diameter portion 70I having a smaller outer diameter than the large diameter portion 708. Further, the plurality of feed rollers 71 attached to the feed roller shaft 44 are formed in a short cylindrical shape.

The document supply section on the top surface 20 of the cover 4 of the copying machine 1 includes:
As shown in FIGS. 1, 2, and 5, a document supply tray 72 for placing a document to be supplied is mounted at a slight inclination angle with respect to the document table 2. Two rows of pressure roller shafts 73 and 74 are vertically slidably attached to the lower surface of the supply tray 72 and are disposed directly below the feed roller shaft 44 and the supply roller shaft 51, respectively. A leaf spring 76 fixed by a bolt 75 presses the feed roller shaft 44 or the supply roller shaft 51 in the direction of each pressure roller shaft 73 .
and 74, a plurality of rotatable pressing rollers 77 and 78 are attached at positions corresponding to the attachment positions of the feed roller 71 and the supply roller 70, respectively.

Therefore, since the feed roller 71 has a perfect circular shape, the pressure roller 77 facing the feed roller 71 always comes into contact with the outer peripheral surface of the feed roller 71 and is rotated together with the feed roller 71. roller 7
8, since the supply roller 70 is fan-shaped, it may come into contact with or separate from the outer peripheral surface of the supply roller 70 depending on its rotational position.

The arc-shaped large diameter portion 70 of the supply roller 70. comes around downward, this large diameter portion 70. contacts the pressure roller 78, and also moves the original sandwiched between them in the direction of rotation (
Arrow 70. However, at a position where the small diameter portion 70 faces the pressing roller 78, a gap 79 exists between the two, and no force is generated to push out the document.

The pressing roller 68 on the belt 67 side also elastically presses the belt 67 toward the document table 2 by a leaf spring 80, as shown in FIG.

Further, as shown in FIG. 2, the bottom plate 69 further has a rotatable document discharge roller 81 parallel to the belt driven shaft 66 on the downstream side in the document conveyance direction indicated by the arrow 38. A rotatable pressure roller 82 provided at the bottom thereof is also elastically biased.

As is clear from FIGS. 2 and 5, an optical system is provided on the bottom plate 69 between the feed roller shaft 44 and the feed roller shaft 51 for detecting the presence or absence of a document being fed in the direction of the feed roller 71 by the feed roller 70. A first sensor S31 is attached to the belt drive shaft 39 and the feed roller shaft 4.
A second sensor S82 is installed between the two.

Furthermore, as shown in the second figure, a third sensor S83 is also provided on the bottom plate 69 between the belt driven shaft 66 and the original ejection roller 81.
For example, each sensor may be a reflective optical sensor that has the function of detecting the reflected light from a document passing directly beneath it and detecting the presence or absence of a document at that position, or various types of optical sensors that have a projector and a receiver. It can also be configured with a target sensor, a beam switch, etc.

Although not shown in the drawings, the belt driven shaft 66 and the original ejection roller 81 are connected by a belt or the like (not shown) so that they rotate simultaneously in the same direction at the same speed or at a slightly faster speed than the original ejection roller 81. There is.

A document discharge tray 83 is detachably attached to a side surface of the cover 4 that is further downstream of the document discharge roller 81 and covers the main body of the copying machine.

The belt 67 described above, the belt drive shaft 39 that drives the belt, the belt driven shaft 66, the feed roller shaft 44, the supply roller shaft 51, the original discharge roller 81, the pressing port/-ra 6
8. The first to third sensors SSI to SS3 are housed in a space surrounded by the cover 17 surrounding the automatic document feeder 3 and the bottom plate 69 attached to the cover 17, as described above. When the automatic document feeder is rotated around a hinge structure (not shown) provided near the drive J part 18, the entire automatic document feeder rotates, and the rotation of the automatic document feeder as a whole is limited by a limit provided at the center of rotation. This is detected by an open/close switch such as a switch, and the automatic document feeding operation is executed only when the automatic document feeding device 3 is closed.

In addition, the pulleys 26, 22, 35, 41, 43 degrees...
..., etc., use a toothed pulley, and the other side's belt 23.36
．． 47 is preferably a timing belt.

Further, the DF lamp 85, set lamp 86, and jam lamp 87 are respectively provided on the operation plate 84 on the upper surface of the cover of the document feeder 3, as shown in FIG.
5 is turned on when the operator presses the DF switch 88 to create a state for automatic document feeding. The set lamp 86 is for informing the operator that preparations for automatic document feeding are complete, and the jam lamp 87 is lit when a paper jam occurs on the copying machine side or the automatic document feeder side.

Next, a signal transmission path of a control circuit for carrying out a method for preventing forgetting a document, which is an embodiment of the present invention, will be explained with reference to the block diagram shown in FIG.

In FIG. 7, reference numeral 100 denotes a well-known microcomputer, including a ROM into which a control program can be written, and an input interface circuit 1. Arithmetic processing is performed on the data while importing external data from the memory device or exchanging data with the temporary storage WRAM, and the processed data is outputted as necessary to the external device such as the motor M via the interface circuit I2. Including the central processing unit CPU that outputs to the device, the input interface circuit Il receives signals from the copying machine itself, such as main switch ON and OFF.
machine source signals such as ON/OFF signals of the heater temperature stability signal, ON/OFF signals of the pre-heater switch, pulse signals from the photoinkractor 33 which is a pulse generator, and the first to third signals. Signals from the sensors SS and -3S3 as well as ON and OFF signals of the DF switch and open/close switch provided on the operation panel 84 are input.

The output interface circuit I2 is connected to the motor M, DF lamp 85, sensor lamp 86, jam lamp 87, electromagnetic clutch 24, electromagnetic brake 28, solenoids 5OLI and 5OL2, and the copying machine main body via a converter (not shown). The driving part etc. are connected.

In this case, a case will be described in which the automatic document feeder and the main body of the copying machine are separately controlled by their own control devices. However, as will be described later, both of them communicate with each other to ensure proper timing and consistent operation.

Furthermore, the temporary storage RAM stores various signals such as a wait signal, ready signal, machine source signal, auto start signal, etc., as well as chime information that informs the copying machine that a document has been forgotten, which is related to the gist of the present invention. data is temporarily stored.

Next, an embodiment of the present invention will be described with reference to the flowcharts shown in FIG. 8 and subsequent figures. Sl shown below, 32. S
All the symbols 3... indicate step numbers.

In Fig. 8, when the main switch for driving the copying machine is turned on, the program starts, the CPU sets an autostart flag indicating the document feeding status in the RAM (Sl), and then in S2 the machine is stored in the RAM. Determine whether the source signal is in the ON state. The machine source signal indicates whether the main switch of the copying machine is ON, the heater switch is ON, or the pre-heater switch is ON, and other preparations necessary for copying processing have been made on the copying machine. A flag indicating whether
Set when these conditions are met. Therefore, until this is set, the process proceeds in the NO direction and loops through steps S1 and 82.

If YES, proceed to S3 and set the open/close switch to O.
It is determined whether or not the automatic document feeder is closed, that is, whether or not the automatic document feeder is closed. If YES, the process advances to the next step S4. In the case of No, the process returns to step S2.

In S4, it is determined whether the DF clamp 5 is in the ON state. The DF clamp 5 is operated by the operator from the DF on the operation panel 84.
The light is turned on by pressing the switch 88 once, and the light is turned off by pressing the switch a second time. Therefore, as long as the DF clamp 5 is lit, the operator confirms that the copying machine is in automatic document feeding mode. If NO here, the process returns to S2 and repeats the loop from 82 to S4 until the DF switch 88 is pressed. If the DF clamp 5 is lit, the process proceeds to S5, and it is determined whether or not the copying machine main body is in a wait state based on the presence or absence of a wait signal.

As mentioned above, the copying machine cannot perform a copying operation unless the heat roller 15 of the fixing bag fiffi 14 has reached the set temperature. I can't send it.

Such a wait signal is determined based on the setting and reset state of a wait flag that the CPU sets in the RAM based on a signal from the copying machine main body.

If the wait signal is set, that is, YES, it is determined at 86 whether the autostart flag is set.

When copying is performed for the first time after the main switch is turned on, since the autostart flag is always set in step S1, proceed to the next step S7, reset the autostart flag, and proceed to the next step S8. After that, the procedure shown in FIG. 9 is continued.

If NO in step S5, the waiting time has already been completed, so turn on the front lamp 8'6 to permit insertion of the document into the supply port 89 (S53), and then turn on the first sensor. It is determined whether the SSI is ON or not (S5b). If no, return to 82 Ste Nobu to wait for the insertion of 1K F High.

If YES, there is no need to insert any more originals, so in S5c, after turning off the front door lamp 86, the motor M is rotated 55a), and the process moves to the procedure shown in FIG. 1θ.

Also, if NO in step S6! , because the step knob S7 indicates that this is the second copying operation after the main switch was turned on.
In this case as well, the process does not go through the procedure shown in FIG. 9 (it moves to the procedure of S2 and waits for the wait flag to be set).

Step S8 is for continuing the process to the procedure shown in Fig. 9, and the steps after S9 shown in Fig. 9 are special steps that must be passed when the document is fed for the first time after turning on the main step. When the document is normally fed for the second time or later in step s2, it passes from step s2 to S5 or S6, and
The document feeding procedure shown in the figure will be followed.

Step S9, 310 shown in FIG. In Sll, S2. S3. Similar to S4, it is determined whether the machine source signal is set, whether the opening/closing step is ON, and whether the DF lamp is ON.

If the determination in S9 is NO, this indicates that the conditions for performing the copying operation on the copying machine main body side are not satisfied, and the process returns to the starting state shown in FIG. 8. Further, if it is determined No in SIO and S11, the process returns to s2 via 312 where a reset operation is performed. S9. If both S10 and S11 are YES, it is determined in S13 whether the first sensor SSI is ON.

In the preparation state, as shown in FIG.
0 arc-shaped large diameter portion 70. is located on the opposite side of the supply roller shaft 51 from the pressure roller 78, so a gap 79 exists between the supply roller 70 and the pressure roller 78.
A document inserted through a document supply port 89 (shown in FIG. 5) provided in the cover 17 can be inserted through a gap 79 into a nip point 90 between the feed roller 71 and the pressure roller 77. At this point, the motor M is stopped, so the document inserted into the gap 79 is guided between the bottom plate 69 and the document supply tray 72, and its leading edge is held by the feed roller 72.
1 and the pressure roller 77 until it comes into contact with the nip point 90.

Therefore, in S13, if the first sensor SS is 0 toma, it indicates that the document has been inserted through the gap 79 from the document supply port 89 to at least the bottom of the first sensor 33-. Therefore, in S14, the sensor lamp 86 to insert a new document is turned off.
F, and in the following step 315, it is determined whether or not it is currently in a wait state. If it is in the wait state, the process returns to S9 and the loop from S9 to 315 is repeated. If it is not in the wait state (NO), it is determined in step 16 whether or not it is in the ready state.

The above-mentioned wait state and ready state are determined by searching information on the RAM side (actually, a flag that is set or reset based on a signal from the main body of the copying machine). The ready state is a signal that is turned ON when the conditions on the copier main body side are met. For example, all of the paper feed cassettes 9 to 9c are not inserted, or there is no copy paper in the cassette 9 to be fed. is not loaded, it turns ON when all other stop conditions on the copying machine main body side, such as lack of toner, are cleared. If it is determined in S16 that the copying machine is not in the ready state, step S17, which is a subroutine for flashing the set lamp 86, is executed to notify the operator of the inconvenient state on the copying machine main body side. Thereafter, the process returns to step 82 through reset step 31B.

In step 313, the first sensor SS.

If it is not ONL, it indicates that the original has not been inserted yet, so the set lamp 86 is turned on in step 319 to prompt the operator to feed the original, and in the subsequent step 320, the document is in the waiting state. If the answer is NO, return to step S2, and if the answer is YES.
In this case, the process returns to step S9 and waits for the document to be set.

Further, if it is determined in step 316 that the ready state has been completed, the solenoid SQL is activated in step 321 to cause the claw 588 of the lever 58 to engage the windmill 54, thereby stopping the rotation of the feed roller shaft 44. At the same time, the motor M is started. After that, the first
As shown in Figure 0 (in step S22, the solenoid 5o
By turning L2 into the OFF state, the locking piece 62 of the lever 62 is removed from the claw portion 64 of the cam 63, and the motor M rotates the supply roller shaft 51 and the supply roller 7o.

When the motor M is started in step S21, since the clutch 24 is in the ON state at this time, the thrift plate 31 rotates, and the number of slits passing near the photo ink club 33 is determined by the pulse input from the photo ink club 33. The number of rotations N of the motor M is calculated by integrating the numbers of . All subsequent measurements of the rotational speed of the motor M are carried out by integrating the pulse signals from this photo ink club.

In step 23, the motor is rotated by the number of revolutions ΔN1 of the motor M corresponding to 1.5 revolutions of the supply roller shaft 51.
- Determine whether or not the motor M has rotated since the motor M was started. The document inserted into the gap 79 is further fed in the direction of the nip point 90 by the 1.5 rotations of the supply roller 70.
In particular, when the supply roller 70 rotates 1.5 times, the arcuate large diameter portion 70 of the supply roller 700. The document is nipped between the press roller 78 and the nip point 90, and the leading edge of the document is forcibly inserted into the nip point 90.

Therefore, at this point the CPU is the solenoid SQL.

324) and solenoid S.
QL is set to OFF' state, and lever 5 is linked to this.
By separating the pawl 58a of No. 8 from the windmill 54 and forcibly rotating the feed roller shaft 44 by the motor M, the document inserted into the nip point between the feed roller 71 and the pressing roller 77 is moved in the direction of the belt 67. send it towards you.

By forcibly inserting the leading edge of the original into the nip point 90 between the stopped feed roller 71 and the pressure roller 77, the leading edge of the original becomes parallel to the feed roller shaft 44, and in this state, the feed roller 7I is rotated. As a result, the traveling direction of the document becomes the same as the traveling direction of the belt 67 indicated by the arrow 38, and the deviation in the traveling direction of the document is eliminated.

At step 324, solenoid SQL.

is removed, then step 324. In motor M
Wait until it rotates by ΔN/min. This rotation of ΔN+' causes the supply roller 70 to further rotate by 0 from the time of step S23.
．． The amount of rotation immediately before 5 rotations is set, and at this point, the solenoid 5OL2 is turned on in step 524b, thereby swinging the lever 62, and the locking piece 62. is pressed onto the cam 63, and the claw portion 64 of the cam 63 rotates and the locking piece 62 of the lever 62. When the cam 6 comes into contact with the
3 and the rotation of the supply roller shaft 51 interlocked with this
Stop at the position shown in the figure.

Next, in S25, the process waits until the motor M rotates by ΔN2. This rotation causes the leading edge of the document to reach the second sensor SS.
Time elapses until it passes position 2. If the second sensor SS2 is not ONL even after this time has elapsed, it is assumed that a paper jam has occurred at the feed roller 71, so NO is selected in step 326.
If it is determined that
), and further at 828', the jam lamp 87 on the operation panel 84 is turned on to inform the operator of the jam state, and the process returns to 82.

If YES in S26, the process waits for the motor M to further rotate by ΔN3 in step S27. This ΔN3
The document sent out by the feed roller 71 and the pressure roller 77 during rotation is inserted between the belt 67, which is run in the direction of arrow 398 by the belt drive shaft 39, and the document table 2, and is inserted between the document table 2 and the document table 2. A belt 67 pressed against the front surface by a pressure roller 68 transports the document in the transport direction shown by an arrow 38 . The amount of rotation ΔN3 described above represents the point in time when the leading edge of the document sent in this way arrives at a certain position on the document table; (near the location) is selected.

In this way, if it is determined in S27 that the document has been fed to the predetermined position, the clutch 24 is turned OFF and the brake 28 is turned ON at the same time in 32B. (because it only needs to be activated instantaneously, for example, for about 0.5 seconds), the belt 670 is stopped.

Subsequently, in S29, solenoid SQL is turned on,
At this point, the original is set in a position suitable for copying. However, due to the rotation of the motor M of ΔN3, there is a possibility that a paper jam may occur between the feed roller shaft 44 and the supply roller shaft 39 during this time, so the next step S29. It is determined whether the second sensor SS2 is ON or not. Here, if the second sensor SS is ON, the process returns to step 827' to handle the jam, and if it is OFF, the process proceeds to the next step S30.

The claw 583 of the lever 58 is
is caught in the windmill 54 and the rotation of the feed roller 71 stops, it is possible to insert the next new document from the document supply port 89. Therefore, at 330, the set lamp 86 is turned on, and at the subsequent S31, the CPU sends a copying operation signal to the copying machine main body side and completes the copying process.

When the copying operation is completed in this way, the electromagnetic clutch 24 is turned ONL and the electromagnetic brake 28 is turned 0FFL at 332.
, the belt 67 is run to send out the document in the direction of the discharge roller 81.

If the document feeding action of this belt 67 works normally, the motor M
When rotated by ΔN4, the leading edge of the document reaches the third sensor S.
83 and turn on the third sensor S83, there is a waiting time corresponding to the rotational speed ΔN in step S33, and then in step S34,
A determination is made as to whether or not the third sensor SS is ON.

If the judgment is No here, it indicates that the document is jammed such as getting tangled with the belt 67, so 335
At the same time as stopping the motor M, the jam lamp 8 is turned on.
7 is turned on (336).

If there is a YES determination in step 334, S
At step 37, wait until the motor M rotates by ΔN5 more,
At that point, motor M is stopped (338).

When the motor M rotates ΔN5, the end of the document is the document discharge roller 81.
The amount of rotation is set to an extent that completely passes the . At this point, it is determined again in S39 whether or not the third sensor S33 is lit, and if it is lit (YES), the document is moved between the belt driven shaft 66 and the document discharge roller 81. Since it is presumed that the motor M is clogged, the motor M is stopped and the jam is cleared through S35 and S36 in the same manner as described above. If NO in 339, the process returns to step S2 to prepare for feeding the second and subsequent documents.

In the work procedure described above, the document is fed one by one to the document supply port 8.
In the automatic document feeder described above, a fan-shaped document supply roller is used in the document supply section, so it is possible to insert multiple document stacks into the document supply section. Each time the document supply roller rotates, these documents are automatically fed in order from the top toward the belt feeding section, so it is possible to manually feed documents one by one according to the operator's will. It also enables fully automatic document feeding in which a plurality of documents are automatically fed in sequence.

As described above, when the DF lamp 85 is ON, that is, in the automatic document feed mode, the inserted document is ejected by the document discharge roller after copying, so there is no chance of forgetting the document.

On the other hand, if the copying process is performed while the DF lamp 85 is OFF, the belt 67 will not run, so there is a possibility that the document will be left behind on the document table even after the copying process is completed.

FIG. 11 shows the processing in such a case. Let us consider a case where the DF lamp 85 is OFF in step 340, that is, in the manual original exchange mode: - The copying process for a predetermined number of sheets has been completed.

Then, in 341, it is determined whether the open/close switch is currently ON. If No, that is, if the document feeder is open, it is assumed that the operator has generally removed the document, so the chime flag on the RAM side is reset (S42). If YES, then it is determined in 343 whether the DF lamp 85 is ON or not, and Y is determined here.
If it is ES, the original is automatically ejected, so the chime flag is reset (S44). If NO, a chime flag in the RAM is set in order to notify the copying machine main body of the need to alert the operator of the forgotten document state (345).

On the other hand, the control circuit on the copying machine side also refers to the state of the chime flag in the RAM on the automatic document feeder side, and as shown in FIG. Then, 5102
It is determined whether or not the chime flag is set. If the DF clamp 5 is ON and the chime flag is set in S45, the process waits in 3103 until this state is maintained for a period of ΔT. If the opening/closing switch is turned off even after 61 hours have elapsed, or if the manual document exchange mode is not changed to the automatic document feed mode, an alarm chime is sounded in 3104.

In this example, a chime is sounded as an alarm, but other means may include a buzzer or simply flashing a lamp.

Furthermore, although the above example describes a case where the automatic document feeder and the copying machine are independently controlled by separate control devices that work together, it is also possible to control both by a single microcomputer or the like. , the gist of the present invention is also applicable in that case.

Furthermore, in the above embodiment, the solenoid SQL.

The windmill 54 and pawl 64 stop rotating when the or SQL is turned on, but this means that the solenoid is turned off.
It is also possible that these are stopped when the feed roller shaft 44 and the supply roller shaft 51 are stopped.

As described above, the present invention includes a document supply section that feeds the document one by one onto the document table, a belt feeding section that conveys the fed document to a predetermined position on the document table, and the belt. A device for preventing forgetting a document in an automatic document feeder, which includes a document feeder having a document ejecting section for discharging the document fed from the feeder to a document ejecting tray, is attached to a document table so as to be openable and closable. When the copying operation in the exchange mode is completed, it is determined whether the automatic document feed mode is selected, and if the document feeder is in the manual document exchange mode, the original document handling procedure is performed when the document feeder remains open for a predetermined period of time. This is a device for preventing document forgetting, which is characterized by not executing the document document processing procedure when in automatic document feed mode, so it can be used even when the document feeder also serves as a document presser. It is possible to perform a process of notifying a forgotten document only in the case of manual document exchange work, and to convey appropriate information to the operator, thereby improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the entire copying machine (showing the document feeder in an open state) to which the method for preventing document forgetting according to an embodiment of the present invention can be applied, and FIG. 2 is the same. A schematic side sectional view of the document feeding device in a closed state, FIG. 3 is a plan view showing the document feeding section of the document feeding device, FIG. 4 is a side sectional view of the document feeding section, and FIG. 5 is a side sectional view of the document feeding section of the same document feeding device. 6 is a front view of the operation panel for an operator to operate the document feeding device, and FIG. 7 is a control used to implement the control method according to the present invention. A block diagram showing a signal transmission system in the circuit, and FIGS. 8 to 12 are flowcharts showing a control procedure according to an embodiment of the present invention. (Explanation of symbols) 1... Copying machine 2... Document table 3... Document feeder 4... Cover 24... Electromagnetic clutch 28... Electromagnetic brake 39... Belt drive shaft 66. ... Belt driven shaft 67 ... Belt 68
...Press roller 69...Bottom plate 7o...Document supply roller 71...Feed roller 8o...Document discharge tray SS, ~SS3...First to third sensors SQ
L,,5QL2 river solenoid Sl,32. S3.・・・・・・ ・・・Step. Applicant Sanda Kogyo Co., Ltd. Agent Patent Attorney Takeo Honjo

Claims (1)

[Claims] A document feeding section that feeds originals one by one onto the document table; a belt feeding section that conveys the fed documents to a predetermined position on the document table; and a belt feeding section that conveys the fed documents one by one onto the document table; In a document forgetting prevention device in an automatic document feeder, which includes a document feeder having a document ejecting section for ejecting documents to a document ejection tray, and which is attached to a document table so as to be openable and closable, copying work in a manual document exchange mode has been completed. At this point, it is determined whether the mode is automatic document feeding mode or not, and in the case of manual document exchange mode, when the document feeder remains open for a predetermined period of time, the document forgotten processing procedure is executed, and the automatic document feeding mode is executed. 1. A method for preventing a document from being forgotten in an automatic document feeder, characterized in that the document is not forgotten when the document is in the automatic document feeder mode.