JPH03182478A - Copying machine with document feeder - Google Patents

Abstract

PURPOSE:To shorten the time from the interruption of a copying action to a restart and the time from the restart to the completion by reverse-feeding the documents being transported in response to the outputs of abnormality detecting means detecting the abnormality of the documents, a recording sheet feed means, and a copying means, and returning them to the feed end side. CONSTITUTION:A jam of recording sheets of a copying machine main body 100 is detected by multiple detectors provided along a transfer path. A document feeder 1 restarts the transfer action of documents with a processing circuit responding to the outputs of detectors S11, S12 detecting a jam of the recording sheets. The transport direction when this transport action is restarted is in the opposite direction to the transport direction for reading/exposing actions of normal document images, i.e., the recording sheets stopped on the transfer path of the document feeder 1 are transported in the stacking direction on the top of the documents stored in a document storage section 2 in sequence. The documents stopped on the transport path of the document feeder 1 are returned to the document feed end side the document storage section 2.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a copying machine equipped with a document feeding device.

Prior Art A typical prior art is disclosed in Japanese Patent Publication No. 63-29259. In this prior art, when the copying function is restored when a paper jam occurs in the copying machine main body or the document feeder, the document stopped in the document feeder is fed sequentially, that is, it is cyclically conveyed in the normal document conveyance direction. do,
Next, the copying operation of the relocated originals is resumed in the order of the originals at the time when the copying operation was stopped.

FIG. 10 is a diagram schematically showing the operation of a copying machine equipped with a conventional document feeding device when a paper jam occurs in the copying machine main body. In FIG. 1O, the same reference numerals are given to parts corresponding to those of the embodiment described later.

As shown in FIG. 10 (1), a plurality of originals arranged in order of page number are stacked in the original storage unit 2 of the original supply device 1 with the first page at the bottom. The paper feed roller 12 starts feeding one document at a time, starting from, for example, the fifth page of the document located at the top.

As shown in FIG. 10 (2>), the document whose feeding operation has started is guided from the support [5] to the document reversing means 8, and then conveyed by the support cylinder 6 to the second reading position 21, and then The original image on the front side is read and exposed. Original supply device 1
Copying machine main body 100 in synchronization with the document feeding operation in
, the recording paper P is conveyed from the paper feed cassette 106a to the photoreceptor 101 by the paper feed roller 109a, and a copying operation is performed on each document in order from the fifth page.

Now, as shown in FIG. 10 (3), after the copying corresponding to the fifth page of the manuscript is completed, the fourth page is copied in the next copying operation corresponding to the fourth page. Assume that a paper jam occurs in the vicinity of the photoreceptor 101. When a recording paper jam occurs in the copying machine main body 100 in this way, the original supply device 1 and the copying machine main body 1
00, the operation is temporarily stopped and a paper jam is displayed to the operator. When the operator removes the jammed recording paper in the copying machine main body 100 in accordance with this paper jam display, the document feeding device 1 detects the document (second page ~4th page> are temporarily returned to the document storage unit 2 without being subjected to the reading and exposure operation.

Furthermore, the first page of the original that was not supplied to the transport path of the original supply device 1 is also fed and transported, and in the original storage section 2, all the originals are as shown in the original storage as shown in FIG. 10 (4). Relocated to the state.

Then, when the operator again instructs to resume the interrupted copying, the document supplying device 1 continues copying until the document at the time of interruption of the copying operation (fourth page) is next supplied from the document storage section 2. The copying machine main body 100 equipped with the document supply device 1 is interrupted by such an operation of carrying out a so-called idle feeding in which a completed document is conveyed without being read and exposed, and then resumes the copying operation.

FIG. 11 is a diagram schematically showing the conventional operation when recording paper is consumed in a copying machine equipped with a document feeding device. As shown in FIG. 11 (1), when making copies of a total of five originals arranged in layers of pages, only one recording paper P is placed in the paper feed cassette 106a in the copying machine main body 100. Assume that there is only one available.

As shown in FIG. 11(2), when the document feeding operation by the paper feed roller 12 is started, the fifth page of the document whose document image has been read and exposed at the second reading position 21 is fed. The photoconductor 1 is fed from the cassette 106a by the paper feed roller 109a.
Copied onto the recording paper supplied to the paper feed cassette 10
6a, the recording paper on which the next document should be copied is consumed and no longer exists.

As shown in FIG. 11(3), the document supply device l further transports the document and transports the next fourth page of the document to a reading value of 1f21, but the document feeder 106a of the copying machine main body 100 The consumption of the recording paper P at the detector S1
9, the operations of the document supply device 1 and the copying machine main body 100 are temporarily stopped, and the consumption of the recording paper P is displayed to the operator.

Furthermore, as shown in FIG. 11 (4), the original supply device W
1, the document feeder 1 feeds the document (second to fourth page) that is in the middle of being conveyed when the copying operation is interrupted, without reading and exposing it, and returns it to the document storage section 2. The first page original stored in the original storage unit 2 is also supplied and transported, and returned to the bottom of the original storage unit 2.The original in the original storage unit 2 rearranged in this way is not copied. It is assumed to be in the initial state in which it was stored before the operation started.

Therefore, when the operator replenishes the paper feed cassette 106a with recording paper P in accordance with the display of recording paper consumption and instructs to resume the interrupted copying operation, the document supply device l starts supplying the document. At this time, in the same way as the feeding operation explained in FIG. After the fourth page is fed, the copying operation is restarted. As a result, it is possible to obtain copied recording sheets arranged in order of page number in the ejection tray 110 corresponding to a plurality of original documents.

Problems to be Solved by the Invention As explained in FIGS. 1O and 11, in the conventional technology, the document feeding device 1 can only transport the document in one predetermined direction. 10
Before resuming the copying operation that was interrupted when a paper jam occurs in 0 or when the recording paper P is consumed, other originals must be fed repeatedly until the original at the time of interruption is conveyed to the reading position f21. However, especially when there are many originals, it takes a long time to restart the copying operation after it is interrupted, and even after the copying operation is restarted, it takes a long time to complete the copying operation after the interruption. The problem is that it takes a lot of time.

It is an object of the present invention to provide a recovery time to a state where copying operations can be resumed and a recovery time before the end of copying operations when copying operations are stopped due to an abnormal situation such as a paper jam or consumption of recording paper in a copying machine. It is an object of the present invention to provide a copying machine equipped with a document feeding device that can significantly shorten the required time.

Means for Solving the Problems The present invention provides a document transport system in which stacked originals are fed to an exposure position from the supply end on the side in the stacking direction, and the exposed originals are returned to the storage end on the other side. an original supplying means in which a path is formed; a recording paper supplying means for supplying recording paper on which the original is to be copied; a copying means for copying the original brought to an exposure position by the original supplying means onto recording paper; Abnormality detecting means detects an abnormality in the original document supplying means, recording paper supplying means, and copying means, and in response to the output of the abnormality detection means, the original document supplying means is operated, and the original document being conveyed is A copying machine equipped with a document feeding device characterized in that it includes a control means for controlling a path to convey the document in a direction opposite to the direction in which the document is conveyed and return it to the feeding end side.

According to the present invention, the original supply means supplies the stacked originals from the supply end side to the exposure position along the original transport path, and the recording paper supply means supplies the recording paper on which the originals are to be copied. supply The copying means copies the original brought to the exposure position by the original supplying means onto recording paper supplied by the recording paper supplying means. The exposed original is returned by the original feeding means to the storage end side of the stacked originals along the original transport path.

The abnormality detecting means detects an abnormal situation occurring in the original supplying means, the recording paper supplying means, and the copying means, such as a paper jam of the original or recording paper, consumption of the recording paper to be supplied, or a failure of the copying means. The control means controls the document supply means in response to the output of the abnormality detection means so that the document being conveyed in the document conveyance path is conveyed in a direction opposite to the document conveyance direction and returned to the supply end side. Control behavior.

In this way, when the abnormality detecting means detects the occurrence of an abnormal situation in a copying machine equipped with a document feeding device, the document feeding device moves the document being transported in the direction opposite to the normal document transporting direction. After the abnormal situation has been processed,
The copying operation can be quickly restarted by quickly supplying the original document whose copying has been interrupted and has not been done to the exposure position. Therefore, in a copying machine equipped with a document feeding device, it is possible to shorten the time it takes to restart a copying operation that was interrupted when an abnormal situation occurs and the time it takes to finish a restarted copying operation, improving copying efficiency and improving functionality. Sexuality is greatly improved.

Embodiment FIG. 1 is a simplified cross-sectional view showing the basic structure of a transfer type electrostatic copying machine equipped with a circulation type original supply device 1. As shown in FIG.

At the center of the interior of the copying machine main body 100 is a right cylindrical photoreceptor 1.
01 is rotatably arranged.

A charging corona discharger 102 is provided on the outer periphery of the photoreceptor 101.
Copying process sections are provided along with a developing device 103 and the like, and a fixing device 10 is provided on the left side of the drawing with respect to the photoreceptor 101.
4 are arranged.

The circulating document supply bag M1 is provided on the upper surface of the copying machine main body 100, and has first reading positions 20 located vertically below the first support tube 5 and the second support tube 6 of the document supply device 1, respectively.
and the second reading position 21 are provided in parallel in substantially the same plane on the upper surface of the main body 100.

Further, a third reading position 105 corresponding to a bound book or the like is provided on the upper surface of the copying machine main body 100, and constitutes an exposure means 1/19 capable of two systems of reading exposure methods.

FIG. 2 is a simplified cross-sectional view of the circulating document feeder 1. As shown in FIG. The document supply device 1 includes a document storage section 2 that stores documents.
, a paper feeding means 3 that slides and feeds one document from the document storage section 2;
, a right cylindrical first support cylinder 5 that transports the original along its outer circumferential surface so that one surface thereof faces the first reading position 20; and a first support cylinder 5 that has a right cylindrical shape and faces the other surface of the transported original towards the second reading position 21. a right cylindrical second support tube 6; a document conveying means 7 for conveying the document from the document storage section 2 to the first support tube 5;
a second document reversing means 8 for reversing the conveyance state of the document so that the surface facing the second reading position 2 which is interposed between the support cylinder 6 and the first surface facing the first reading position 20 is the other surface; It is configured to include a document storage means 9 for returning the document from the support tube 6 to the document storage section 2.

The document storage unit 2 stores, for example, a plurality of sheet-like document documents that have document images on both sides and are arranged in the order of the number of attached pages, with one end (the left end in FIG. 1
With the originals aligned at 0, face the side of the original with the smallest page number onto the original transport belt 11! ! Place and accept. In order to separate and feed the originals placed in the original storage unit 2 one by one to the original transport unit 7 starting from the topmost original, a document feeding unit 3 is provided above the original storage unit 2. A paper feed roller 12 is provided. This paper feed roller 12 is driven to rotate in the direction of the arrow at a predetermined timing by a document feed motor M2, and is pressed against the document Do located at the top via a lever 13 by a force such as a solenoid during rotation. , whereby the documents are separated and fed to the document conveying means 7 in order starting from the document DO.

1 document F) is fed from the document storage section 2 by the paper feed roller 12.
As shown in the figure, the document conveying means 7, which feeds the documents sheet by sheet, has a conveyance path 14 bent from the horizontal direction to the downward vertical direction. At the entrance side end of the conveyance path 14, separating rollers 15a and 15b are installed to prevent double feeding of documents. The upper roller 15a is rotationally driven in the direction of conveying the original, and the lower roller 15b is rotationally driven in the direction of returning the original.By passing between these rollers 15a and 15b, the original is reliably separated into individual sheets. transportation route】4
sent to. On this conveyance path 14, each pair of conveyance rollers 16a, 16b, 16c are spaced apart in the conveyance direction.
16d will be installed.

Each pair of rollers 16a to 16d rotatably abuts on both sides of the document tray, and the rollers 6a to
By forcing the document transport motor M3 to rotate the document transport motor M3, the document is guided along the transport path 14 by each of the rollers.
It is conveyed in the direction of arrow 17 along. A document feed detector S2 is installed near the entrance side of the conveyance path 14, and a detector S3 before the first reading position is installed near the exit side.

Further, at the exit portion of the conveyance path 14 (near the first support tube 5), a pair of rugist rollers 19a are provided.

Install 19b. This lugistroller 19a, 19
(b) is connected to the drive shaft via a clutch CLTI (not shown), and rotation is stopped and re-rotated by on/off control of the clutch CLTI. The on/off control of clutch CLTI is controlled according to the content of copying desired by the operator. That is, when it is necessary to read the document tray, the rotation of the rollers 19a and 19b is stopped and the document tray is placed on standby in order to synchronize with the conveyance of the recording paper in the copying machine main body 100, and synchronization is achieved. Afterwards, it rotates again and conveys the document to the first support cylinder 5.

On the other hand, if it is not necessary to read the document, always use roller 1.
9a and 19b simply rotate as conveyance rollers like other conveyance rollers, and allow the document to pass through without stopping.

Note that when the first rug rollers 19a and 19b operate simply as conveyance rollers, the length of the document to be conveyed must be less than the maximum allowable length of 11. The rotation of certain transport rollers 16c and 16d does not stop until the transport of the original document is completed.

On the other hand, when the first registration rollers 19a and 19b operate as registration rollers that keep the document on standby and adjust the timing of conveyance to the first support cylinder 5, the rotation of the conveyance rollers 16c and 16d at the above positions also occurs. controlled. That is, when the leading edge in the conveying direction of the original document conveyed through the conveyance path 14 reaches between the rollers of the first rollers 19a and 19b, the rotation of the conveying rollers 16c and 16d is temporarily stopped, and the conveyance of the original document is stopped. Thereafter, at the same time as the first rollers 19a and 19b start rotating, the rotation of the conveyance rollers 16c and 16d is also restarted, and the conveyance of the document is resumed.

The position at which the document image on the document tray is read is a first reading position 20 that is configured to correspond to the vertical lower end surface of each of the first support tube 5 and the second support tube 6, which are installed in parallel with an interval in the horizontal direction.
and a second reading position 21. These first reading positions 2
o and the second reading position f21 are located on the same plane as shown in the figure.

Each of the support cylinders 5 and 6 is connected to a document transport motor M4.
It is rotated clockwise by M5 at a speed synchronized with the speed of copying onto recording paper. Further, each support cylinder 5, 6 is provided with a driven roller 2 at a predetermined interval along its outer circumferential surface.
2a to 22d and 23a to 23d are installed, and these driven rollers press and wrap the document paper onto the outer circumferential surface of each support tube 5, 6, and the circular conveyance formed on the outer circumferential surface of the support tube 5.6 The original document is conveyed along the paths 20a and 21a.

A hard transparent glass plate 24.25 is installed vertically below the circular conveyance paths 20a, 21a to constitute the first and second reading positions 20.21.

When the document tray passes between the first support cylinder 5 and the first transparent glass plate 24, one surface of the document tray (in FIG. 2, the document tray stacked in the document storage section 2) The second one reads and exposes the top surface) to form an image corresponding to the other surface.
Support 1! When passing between J21 and the second transparent glass plate 25, as described later, the other surface of the document tray (the lower surface of the document tray in the document storage section 2) is read and exposed to correspond to the other surface. image.

Note that these first reading positions 20 and second reading positions 21
Depending on the contents of the copy desired by the operator, the reading exposure operation may not be performed and the document may pass through as is.

The document is conveyed to the first reading position 20 via the conveyance path 14 of the document conveyance means 7 while being wrapped around the first support cylinder 5 by the rotational force of the first rollers 19a and 19b. As shown in the figure, between the first support cylinder 5 and the second support cylinder 6, a document reversing means 8 having a front-back reversing path 30 for switching the surface facing the reading position of the document is disposed. The reversal path 30 includes a first path 30a and a second path 30b that extend upward from opposing portions of the circular conveyance paths 20a and 21a of the first support tube 5 and the second support tube 6, respectively.
and a third route 30c extending horizontally to the left from the confluence of these routes 30a and 30b.

A direction changing claw 31 is installed at the entrance of the first path 30a that is continuous with the circular conveyance path 20a of the first support tube 5. The direction changing claw 31 is actuated by the solenoid 5OL1 to selectively transport the document to the first path 3a or to the circular conveyance path 20a of the first document support cylinder 5. That is, if the original document passing through the first reading position 20 is to be exposed to -degree reading according to the contents desired by the operator, the direction changing claw 31 is moved to the solid line position in FIG. is transported to the first path 30a. On the other hand, if multiple reading exposures are required, the direction changing claw 31 is moved to the position indicated by the two-dot chain line, and the document is moved around the first support cylinder 5 through the circular conveyance path 1B 20.
Convey along a multiple times.

After the reading exposure operation is completed, the direction changing claw 31 operates to the solid line position and conveys the document to the first path 30a. 1st route 3
0a, a first reading position post-detector S4 for detecting the rear end of the document D in the conveyance direction, a pair of rollers 34a and 34b, and a direction changing claw 35 are installed in order from the upstream side of the document D in the conveyance direction. Based on the detection signal of the detector S4, the following front/back reversal operation is controlled.

The original document is conveyed to the third path 30c via the direction changing claw 35 by rotationally driving the rollers 34a and 34b. Each pair of conveyance rollers 3 is provided in the third path 30c.
6a, 36b; 37a, 37b are provided. roller 3
6a and 37a are rotated in forward and reverse directions by a document reversing motor M6. These conveyance rollers 36 and 37 convey the document from the direction changing claw 35 in the direction of arrow 40a within the third path 30c, and then the rear end of the document in the conveyance direction is transferred to the direction changing claw 35.
5, the rotation of the motor M6 is reversed to transport the document in the direction of the arrow 40b.

The direction changing pawl 35 is brought into the state shown by the solid line in FIG.
While closing the route 30a, opening the second route 30b,
The original document is transported to the second path 30b. Second
A roller 34c is disposed on the path 30b, and the solenoid 5
The above-described reversal operation of the document, in which the document is conveyed by being pressed against the roller 34a by the OL 3 and the document is held between them, is realized by using the forward/reverse rollers 36 and 37, but for example, a belt conveying device or A configuration using an air conveying device or the like may also be used.

Further, the rotational force of the rollers 34a and 34c assists the operation of the second support cylinder 6 to wrap the original document around its outer peripheral surface and convey it to the second reading position 21. A second reading position front detector S5 is installed at a position on the downstream side in the transport direction with respect to the roller 34c to detect the passage of the leading end of the original document in the transport direction.

Furthermore, a pair of second registration rollers 59a and 59b are disposed on the downstream side in the transport direction with respect to the detector S5.

This second registration roller 59a.

Although not shown, 59b has a clutch CLT on the drive shaft.
2, and the ON/OFF state of clutch CLT2 is connected via CLT2.
Rotation is stopped by off control and rotation is performed again. The on/off control of the clutch CLT2 is controlled according to the copy content desired by the operator.

That is, when it is necessary to read a document, the rotation of the rollers 59a and 59b is stopped and the document is placed on standby in order to synchronize with the recording paper, and after synchronization is established, the document is rotated again and the second The document is conveyed to the support cylinder 6. On the other hand, when it is unnecessary to read the original document, the rollers 59a and 59b are simply used as transport rollers and are constantly rotated to allow the original document to pass through without stopping. Here, the operation of the solenoid 5OL3 is controlled according to the rotational operation of the rollers 59a and 59b.

The length of the second registration roller 59a is less than the maximum allowable length 11 of the document to be transported.

Conveying roller 36.3 located upstream of 59b in the conveying direction
7 is the aforementioned second registration roller 59a.

The operation is similar to that between the transport roller 19b and the transport rollers 16c and 16d.

That is, the second registration roller 59a.

When the roller 59b simply functions as a conveying roller, the conveying roller 36 for conveying the document to the second support cylinder 6,
37 does not stop until the conveyance of the document folder is completed. On the other hand, when the second registration rollers 59a and 59b operate as registration rollers, the leading edge of the document document in the conveyance direction is placed between the rollers 59a and 59b. When reaching the point, the rotation of the conveying rollers 36 and 37 is temporarily stopped. Thereafter, at the same time as the second register rollers 59a, 59b start rotating, the transport rollers 36, 37 also start rotating, and the transport of the document resumes.

As described above, by reversing the conveying direction of the document tray in the front-back reversing path 30, the document tray is already at the first reading position 20.
The document is wound around the outer circumferential surface of the second support tube 6, with one surface facing toward the outside facing the outer peripheral surface of the second support tube 6, and the document is conveyed in the second support tube 6 with the other surface of the original that does not yet face the reading position facing the outer surface. Therefore, at the second reading position 21, the other surface of the document tray is read and exposed, and an image corresponding to the other surface is formed. In addition, this second reading position! The reading exposure operation at 21 may not be performed and the document tray may be passed through as is, depending on the content desired by the operator to be copied.

Regarding the second support cylinder 6, a direction changing claw 46 is installed at a portion where the original document passing through the second reading position 21 branches from the circular conveyance path 21a to the conveyance path 45 of the document storage means 9. The direction changing claw 46 is operated by the solenoid 5OL4 to selectively open and close the circular conveyance path 21a with respect to the conveyance path 45.

That is, when the reading exposure at the second reading position 21 is performed only once in accordance with the copy content desired by the operator, the circular conveyance path 21a is opened and the document is conveyed to the conveyance path 45. On the other hand, when reading exposure is performed a plurality of times, the conveyance path 45 is closed and the original document is conveyed a necessary number of times along the circular conveyance path 21a, and then conveyed to the conveyance path 45.

As described above, by reading and exposing one surface of the document tray at the first reading position 20 and the other surface at the second reading position 21, it is possible to copy both the front and back sides of the document tray. Further, since reading and exposure can be performed a necessary number of times at each of the first reading position 20 and the second reading position 21, it is possible to make a plurality of copies as necessary for a plurality of original sheets.

In the document storage means 9 that returns the document sheet from the second reading position 21 to the document storage section 2, the conveyance path 45 is connected to the lower end of the conveyor belt 11 and the document sheet is returned to the document storage section 2 from the second reading position 21.
Transport to 1. That is, a pair of transport rollers 50 and 51 are installed on the transport path 45 to transport the document. Further, near the exit of the conveyance path 45, a document storage load detector S6 is installed to detect the passage of a document. This detector S6
The operation of the conveyor belt 11 and document storage means 9 is controlled by the detection signal from the document storage means 9.

The endless conveyor belt 11 includes rollers 55a installed vertically and horizontally at intervals as shown in FIG.

It is wrapped around 55b, 55c, and 55d.

By rotating the drive roller 55b in the direction of the arrow by the return conveyance motor M7 based on the detection signal from the detector S6, the conveyance belt 11 is rotationally driven in the counterclockwise direction. The upper rack part of this conveyor belt 11 is placed on the document tray 1.
It also serves as a department. In addition, a document drawing roller 56 is installed at a position close to the transport path 45, and the transport belt 1
The document is transferred to the conveyor belt 11 by the conveyance force between the conveyor belt 11 and
Feed it between the top rack and the bottom of the document tray placed on it.

At that time, in order to make the feeding operation smooth, the document storage section 2
On the lower side of the downstream end in the paper feeding direction of the document tray placed on the
A document riser roller 58 is installed. As a result, the right end of the stacked originals in the drawing is temporarily lifted from the conveyor belt 11, and the opening for feeding the originals to the lowermost end is reliably widened.

When the leading edge of the document fed to the lowermost position reaches the edge aligning member 10, the conveyor belt 11
When the drive motor M7 is stopped, the operation of returning the document to the document storage section 2 is completed.

Further, as shown in the figure, a detection actuation member 60 made of, for example, a mirror-finished stainless steel plate is disposed in the document storage section 2 in order to detect one cycle of the placed document. Before the operator places the document tray in the document storage section 2, the actuating member 60 is at the lower end position shown by the solid line in FIG. 1, and the document tray is placed on it. As the originals are fed one by one from the original storage section 2 and returned again, the actuating member 60 is gradually displaced upward and interposed between the unfed originals and the re-stored originals to separate them.

When all the originals have gone through one cycle, the actuating member 60 reaches the uppermost position indicated by the two-dot chain line.

The actuating member 60 that has reached the uppermost position moves the document inside the document storage section 2, which is made up of a combination of a light-emitting element and a light-receiving element, for example.
A circulation detector S1 detects the exposure state and generates a detection signal indicating that the circulation has ended. Using this detection signal, operations on the copying machine main body 100 side, such as copying the number of copies desired by the operator, are controlled. Thereafter, the actuating member 60 is driven by the actuating member drive motor M1.
The 80-degree rotating plate is returned to the lower position I (original position) with respect to the original plate.

With the configuration and operation described above, the document supplying device 1 transfers the documents stored in the document storage section 2 to the document transport means 7.
, the first support cylinder 5, the document reversing means 8, the second support cylinder 6, and the document storage means 9 are conveyed in this order, and each document is presented to the first and second reading positions 20° 21, Each document image is read and exposed.

Furthermore, in this embodiment, in addition to the above-mentioned normal document conveyance operation, the document is also configured to be able to be conveyed in the opposite direction in case an abnormality is detected in the copying machine during conveyance. Ru. That is, the motors M3 to M5 disposed in the document supply device 5F1 are selected to be capable of forward rotation as well as reverse rotation.

By the reverse rotation of these motors M3 to M6, the conveyance rollers 16a to 16d, 36a, 36b, and 37a.

37b and support l! J5.6 rotates in the opposite direction, thereby transporting the document in a direction opposite to the normal transport direction. At the same time, the solenoids 5QLI to 5QL4 are also driven, and the direction changing claws 31, 35, 46, roller 34c, etc. operate to transport the document in the opposite direction.

Therefore, the manuscript supply device! The document feeding operation in step 1 is temporarily stopped due to an abnormal situation such as a paper jam or consumption of recording paper in the copying machine main body 100, or a failure of the electrical system, but when the drive is subsequently opened again, The conveyance rollers and the like within a preset range relative to the position where the document stops on the conveyance path are rotated in reverse until there is no document left on the conveyance path. As a result, the originals in the original storage unit 2 are rearranged in such a state that the originals that were not copied due to the interruption of copying can be promptly supplied to the read values W20 and W21.

Referring again to FIG. 1, inside and above the copying machine main body 100 are a light source 150 for exposing the surface of a document to slit light, and reflecting mirrors 151a, 151b, and 151c.

Exposure means 14 including 151d and zoom lens 152
9 is provided. In this exposure means 149, the light source 1
When the light source light from 50 is irradiated onto the image on the document tray, the reflected light is reflected by the reflecting mirrors 151a to 151d and the lens 152.
After that, an image is formed on the exposure area 130 of the photoreceptor 101.

The exposure unit 149 applies reading exposure to a first reading position 20 directly below the first support cylinder 5 and a second reading position 221 directly below the second support cylinder 6 in a stopped state according to the conveyance of the document in the document supply device 1. Also, books etc. are located at 3rd yt position 10.
5, light source 150 and reflection #115
These two reading exposure methods, in which the first movable body 71 equipped with the first movable body 71 scans the third yt acquisition position and performs reading exposure, are performed by driving the exposure means 149 with the drive motor M13.

FIG. 3 is a perspective view of important parts of the exposure means 149.

The moving means 70 for moving the exposure means 149 includes a first moving body 71, a second movement #-72, a pair of guide shafts 73.74 supporting each movement #71.72, and each moving body 71.7.
2, and a power transmission section 75 for performing the movement. The first moving body 71 and the second moving body 72 form a pair, and the first moving body 71 includes a light source 150 and a reflection 1151a.
(see Figure 1) is fixed. Reflecting mirrors 151b and 151c are fixed to the second moving body 72. A pair of moving bodies 7
1.72 are provided with insertion holes on both sides, and guide shafts 73 and 74 are mutually inserted into the insertion holes. The movable body 71.72 is therefore slidably movable in the axial direction of the guide shaft 73.74.

A wire fixing member 76 is provided on the side of the first moving body 71, and a part of a flexible wire 77 is fixed thereto. Wire 77 is stretched between pulleys 78a and 78b. Furthermore, the wire 77 is wound around a pulley 79. A flexible wire 80 is wound around the pulley 79 and the rotating shaft of the DC motor M13. Therefore, DC motor M1
The forward and reverse rotational power of 3 is transmitted to the pulley 79 via the wire 80, and the wire 77 is further rotationally driven in the directions of arrows 81a and 81b, so that the first movable body 71 moves along the guide shafts 73 and 74. move along. At this time, the second moving body 72 moves in the same direction at half the speed of the first moving body 71.

A light-shielding detection piece 76a is provided on the side of the wire fixing member 76 of the first moving body 71. First and second reading positions 20, 21 and third reading position 105 shown in FIG.
On the lower side of the home position detector S7. S8. S
9 are provided respectively. Home position detector S7
, 38. S9 is realized, for example, as an optical detector that forms an optical path between a light emitting element and a light receiving element.

When the detected piece 76a approaches the detector S7, its optical path is interrupted, and the processing circuit built into the copying machine controls the rotation of the DC motor M13 based on the detection signal from the detector S7. , control such as stopping the movement of the first moving body 71 and the second moving body 72 is performed. Further, a detector S8 similar to the detector S7 is provided below the second reading position 21, and when the detected piece 76a approaches, the movement of the first moving body 71 and the second moving body 72 is detected. Output a signal. Further, on the lower side of the third reading position 1f105 where books and the like are read and exposed, the first moving body 71
A detector S9 similar to the detector S7 is provided at the scanning start position. This outputs a signal necessary for the first moving body 71 and the second moving body 72 to start scanning.

With reference to FIG. 1 and FIG.
Whether each operation of 59b is performed as a registration roller,
Or whether to use it as a simple conveyance roller, the choice is as follows:
For example, the home position detector S7. Performed by a processing circuit within the copying machine based on the detection signal from S8.
That is, when the detected piece 76a of the first moving body 71 to which the light source 150 is fixed approaches the detector S7 and the light source 150 is set directly below the first reading position 20, the first lug rollers 19a and 19b The second registration rollers 59a and 59b operate as mere conveyance rollers.

Similarly, when the light source 150 is set directly below the second reading position 21, the second registration roller 59a.

19b operates as a simple conveyance roller, and second registration rollers 59a and 59b operate as registration rollers.

As the photoreceptor 101 is rotated clockwise, it is first charged by the charging corona discharger 102 . The reflected light that has passed through the exposure means 149 forms an image on the charged photoreceptor 101 in the exposure area 130, and an electrostatic latent image corresponding to the read original image is formed. This electrostatic latent image is developed into a toner image by the developing device 103. This toner image is transferred to the recording paper P fed to the photoreceptor 101 in the transfer area 129 by the transfer corona discharger 1.
Transcribed by 31. The recording paper P after the transfer is conveyed to the fixing device 104 by the conveying means 132, and fixing is performed.

Note that after the transfer is completed in the transfer area 129, the photoreceptor 10
The toner remaining on the photoreceptor 101 is removed by a cleaning device 133 installed downstream of the transfer area 129 in the rotational direction of the photoreceptor 101 .

Thereafter, residual charges on the photoreceptor 101 are released by the static eliminator 134, and then the surface of the photoreceptor 101 is charged by the charging corona discharger 102 in order to form an electrostatic latent image.

On one side of the copying machine main body 100, paper feed cassettes 106a and 106b containing recording paper P are provided.
Similarly, there is a paper feed cassette 106c 106 in the lower part of 0.
d is loaded. In addition, these paper feed cassettes 106a~
106d includes a detector SL9. to detect the consumption state of the stored recording paper P. S20. S21. S22 is provided respectively.

The recording sheets P stacked in these paper feed cassettes 106a to 106d are picked up one by one in order from the top one and fed to paper feed paths 108a to 108d.

This paper feeding operation is performed by rotationally driving paper feeding rollers 109a to 109d disposed on the upper surface of each paper feeding cassette 106a to 106d by a paper feeding driving motor M8.

Paper transport rollers 107a to 107e are installed in the paper feed paths 108a to 108d and a paper feed path 115 from an intermediate tray 113, which will be described later, and these transport rollers are rotationally driven by a drive motor M9. Recording paper P is fed into the copying process section.

Paper feed cassettes 106a to 106d and intermediate tray 11
The recording paper P fed and conveyed from the third registration roller 160 is installed on the conveyance path to the photoreceptor 101.
The timing of conveyance to the photoconductor 101 is controlled by a and 160b. That is, the leading edge of the recording paper P in the conveying direction that is conveyed to the photoreceptor 101 is aligned with the third registration roller 160.
When reaching between a and 160b, the conveyance of the recording paper P is temporarily stopped.

When reading and exposing one surface of the document tray is performed at the first reading position 20, the second registration rollers 19a and 19b in the document supply device l operate as registration rollers that control the conveyance of the document tray, and the second registration roller 59a, 59b
acts simply as a conveyance roller. The original document is placed on the first rollers 19a and 19b, and the recording paper P is placed on the third
After the registration rollers 160a and 160b are once stopped, for example, the first registration rollers 19a and 19b are rotationally driven to start transporting the document, and then the third registration rollers 160a and 160 are rotated after a predetermined time has elapsed.
b is rotated to start conveying the recording paper P.

This setting time is determined by the first registration roller 19a.

19b starts conveying the document, the document is read and exposed at the first reading position 20 as described above, and the toner image formed on the photoreceptor 101 corresponding to the document image is moved downstream in the moving direction. Depending on the time it takes for the edge to reach the transfer area 129, the recording paper P is
It is set to the time obtained by subtracting the time from when the conveyance starts from 0a and 160b until the leading end in the conveyance direction arrives at the transfer area 129, and is measured by, for example, a timer in the control device. Therefore, by synchronizing as described above, it is possible to reliably align the transferred image with respect to the recording paper P.

Also, the reading exposure of the other surface of the document tray is at the second reading position 2.
1, the second registration rollers 19a and 19b simply operate as transport rollers, and the second registration rollers 5
9a and 59b operate as registration rollers. Second
The relationship between the timing of document conveyance by the registration rollers 59a, 59b and the conveyance timing of the recording paper P by the third registration rollers 160a, 160b is based on the aforementioned first registration rollers 19a, 19b and third registration roller 16.
It is set in the same way as the synchronous relationship with 0a and 160b. Note that the third registration rollers 160a and 160b as described above
Rotation/stop control is performed by on/off control of a recording paper conveyance clutch CLT3 interposed between the drive motor and the recording paper conveyance clutch CLT3.

A discharge tray 11 is provided on the other side surface of the copying machine main body 100.
0 is placed. A solenoid 5OL8 is attached to this discharge tray 110.
When 5OL8 is energized for a predetermined period of time, the discharge tray 110 is shifted toward the front of the paper in FIG. As a result, the output tray 110 can receive multiple sets of recording sheets for multiple original documents in a sorted state.

Inside the main body 100, there are provided an ejection path 111 for ejecting the recording paper P that has passed through the fixing device 104 through the copying process to the ejection tray 110, and a recording paper front-back reversal path 112 branched from the ejection path 111. . The recording paper P, which has passed through the copying process and the fixing device 104 and has had a copy corresponding to the original image on its surface, can be made into one of the following three types (i) to (iii) according to the operator's desired copy content. The paper is discharged to the discharge tray 110 in the same manner.

(i) Pass through the ejection path 111 as it is and eject tray 1
It is discharged to 10.

(ii>After heading to the ejection path 111, the recording paper front and back reversal path 112 is used to copy onto the other surface of the recording paper P.
After being switched back at , the paper is temporarily stored in the intermediate tray 113 in order to be transported to the copying process again.

The recording sheets P stacked on the intermediate tray 113 are fed to the copying process section via a conveyance path 1@115 by a sheet feeding means 114 which is rotationally driven by a motor M14 in order from the one located at the bottom thereof, The image passes through the fixing device 104, passes through the ejection path 111, and is ejected to the ejection tray 110.

(iii) After heading toward the ejection path 111, the recording paper P is reversed in the recording paper front/back reversal path 112, and then is ejected from the ejection path 111 to the ejection tray 110.

In order to enable the transport operation of the three types of recording paper P described above, the recording paper front-back reversing route 112 includes routes 112a and 112b branched from two positions on the ejection route 111, and these routes 112a and 112b converging. It is composed of a path 112c and a path 112d branching from this path 112C and heading toward the intermediate tray 113. A first direction changing claw 11 is provided at a portion where the path 112a branches from the discharge path 111.
5, a second direction changing claw 116 is provided at the confluence of the route 112a and the route 112b, and a third direction changing claw 117 is provided at the branching location of the route 112C and the route 112d. These first to third direction changing claws 115 to 117 are
Drive solenoids 5OL5 and 5OL6, not shown, respectively
．． 5OL7, and the conveyance path of the recording paper P is selected according to the copy content desired by the operator.

Rollers 118a, 118b, and 118c are disposed near the confluence of the path 112a and the path 112b, and the path 11
A roller 119a is installed near the branching point between 2C and the path 112d.
, 119b, and 119c are provided, each of which conveys the recording paper P. Further, a reversing roller 120 is disposed on the path 112c near the confluence of the paths 112a and 112b, and is rotated forward and backward by a drive motor Mll (not shown) to reverse the conveying direction of the recording paper P. Route 112c and Route 11
A reversing roller 121 is disposed below the branching portion with 2d, and is rotated in forward and reverse directions by a drive motor M12 (not shown). Further, a discharge detector S13 is installed near the exit of the discharge path 111, and a discharge detector S13 is installed near the entrance of the path 112a and the path 112.
Recording paper reversal detectors S14 and S15 are connected to path 112 in c.
Intermediate tray entrance detectors S16 are respectively disposed near the exit portions of d.

Due to the configuration of the recording paper front-back reversing path 112 described above, the above-mentioned (i) ejection! In the case of Mr. g, the first direction changing claw 11
5, the path 112a is closed to the ejection path 111, and the recording paper P is ejected along the ejection path 111. Above (ii
> In the case of the mode, the ejection path 111 is closed by the first direction changing claw 115, and the recording paper P is introduced into the path 112a,
The path 112c is opened with the second direction changing claw 116, and the path 1
At step 12c, the conveying direction is reversed by the reversing roller 121.

Thereafter, the third direction changing claw 117 opens the path 112d, and the recording paper P is guided to the intermediate tray 113.

In the case of (iii) above, after introducing the recording paper P into the path 112C as described above, the reversing roller 120 reverses the conveying direction, and the second direction changing claw 116 closes the path 112a, while the path 112b is opened and led out to the discharge route 111 from the route 112b.

In this copying machine, in order to detect the conveyance state of the recording paper P in each part shown in FIG.
2. An intermediate tray paper presence/absence detector S17, an intermediate tray paper feed detector 318, and the like are provided.

A copying machine equipped with the above-mentioned circulating automatic document feeder 1 has the following features:
Depending on the copy content desired by the operator, (A) multiple sets of single-sided copies from a single-sided original (B) multiple sets of double-sided copies from a single-sided original (C) multiple sets of single-sided copies from a double-sided original (D) ) In any of the double-sided copies made by sorting multiple sets of double-sided originals, it is possible to freely copy by circulating the original multiple times.

Further, depending on the contents of the copy desired by the operator, reading and exposure may be performed while the original is wrapped around the support cylinder multiple times, and a plurality of copies may be made during one circulation of the original.

FIG. 4 is a block diagram showing the electrical configuration of a control device that controls the copying machine main body 100 and the document supply device 1. As shown in FIG. A motor Ml that operates the above-mentioned conveyance roller, support cylinder, etc.
, M2. M3. . . . are connected to the motor drive circuit 170. Clutches CLTI and CLT are used to synchronize the conveyance of the original document conveyed within the document supply device 1 and the recording paper P conveyed within the copying machine main body 100.
2CLT3. . . . are connected to the clutch drive circuit 171. Solenoids 5OLI, 5QL2. which actuate the direction change pawl 3135 etc. in the conveyance path. . . . are connected to the solenoid drive circuit 172. These drive circuits 170 to 172 include a DC power supply 173 and detectors Sl, S2 . S
3. etc., an optical system drive circuit 174 that moves the exposure means 149, an input operation key 176 on the operation panel 175 provided on the copying machine main body 100, and a display drive circuit 177 that drives the display device on the operation panel 175. etc. are connected to the interface circuit 178.

The interface circuit 178 is connected to a processing circuit 179 realized by a microcomputer or the like, and sends a detection signal from the detector to the processing circuit 179, and also sends a control signal from the processing circuit 179 to the various drive circuits 170, 171. .

172, 174, 177. A read only memory (ROM) 180 and a random access memory (RAM>181) are connected to the processing circuit 179. The processing port #8179 controls the copying operation according to a control program stored in the memory 180 in advance. The memory 181 is used as a calculation area for counters, timers, flags, etc. necessary for controlling copying operations, for example.

The interface circuit 178 also includes the optical system drive circuit 17.
4, the exposure means 149 is moved through each reading position 20,
21, 105 and controls the lighting/extinguishing of the light source 150 and the lighting level.

Furthermore, the ink face circuit 178 is connected to the operation panel 175.
The signal from the input operation key 176 on the top is processed by the processing circuit 1
79, and information regarding the progress of the copying operation is displayed on the display means 182 provided on the operation panel 176 via the display drive port W1177. Furthermore, the interface circuit 178 includes a copy FI! Selection switches 5SWl to 5SW4 for selecting the
connected as part of. Selectable copy modes include single-sided copying from a single-sided original, double-sided copying from a single-sided original, single-sided copying from a double-sided original, and double-sided copying from a double-sided original.

FIG. 5 is a plan view showing part of the configuration of the input operation keys 176, display means 182, etc. of the operation panel 175. As shown in FIG. The operation panel 175 includes a number key 183 for setting the number of copies, etc., a clear key 184, a selection key 185 for setting the copy mode, and operations for copying by fixing the original and moving and scanning the optical system. Copying using the ADF key 186, the print switch 187, which gives an instruction to start the copying operation, the set number of copies display section 188, the number of copies display section 189, and the original supply device 1! r! A-like display parts 190 to 193, and AD showing the reading exposure operation state when the optical system is running and driven.
It has F indication M194.

The copy mode display sections 190 to 193 indicate when making a single-sided copy from a single-sided original, when making a double-sided copy from a single-sided original,
For example, one light emitting element lights up in order from the top each time the 0 selection key 185, which indicates four types of copying mode when making a single-sided copy from a double-sided original or when making a double-sided copy from a double-sided original, is pressed once. Then, the corresponding copy mode is selected. After the lowest position, it returns to the highest position, and in the initial state it returns to the highest position, and the copy mode corresponding to each is selected. The set number of copies is set by pressing the number key 183, and is displayed on a set number of copies display section 188, which is realized by, for example, a plurality of 7-segment display devices. When copying without using the document supply bag 21, for example, when copying a bound book, press the ADF key 18.
The light emitting element of the ADF display section 194 is turned on by the pressing operation 6, and copying S is selected, in which the exposure means 149 is driven to run on the document placed at the third reading position 105 to perform a reading exposure operation.

When the copying operation is started by pressing the print switch 187, the number of copied copies is sequentially displayed on the copy number display section 189. When the set number of copies displayed on the set number of copies display section 188 matches the number of copies, the copying operation stops and the display of the set number of copies automatically returns to the "r□" display. The display of the number of copies is maintained until, for example, the next print switch 187 is pressed.

FIG. 6 is a schematic diagram for explaining an example of the operation of a copying machine equipped with the document feeding device 1 according to the present invention. As shown in Fig. 6 (1), when copying a plurality of originals (5 sheets in this embodiment) arranged in the number of pages using the original supplying device 1, the original storage area 2, the original image of the first page is placed facing downward.

As shown in FIG. 6(2), when the operator instructs the start of the copying operation, the feeding roller 12 starts feeding the original. In this embodiment, the original is imaged only on one surface. Since it is assumed that a copying operation is to be performed on a document having the following characteristics, the conveyed document is conveyed from the first support cylinder 5 to the document reversing means 8, and its front and back surfaces are reversed. After that, the original reversing means 8
The original is conveyed by the second support cylinder 6, and at the second reading position 21, the original image on one surface is sequentially read and exposed starting from the fifth page.

On the other hand, in the copying machine main body 100, the recording paper P stored in the paper feed cassette 106a is transferred one by one to the photoreceptor 100 by a paper feed roller 109a in synchronization with the document feeding operation and reading exposure operation of the document feeding device l. The recording paper after copying is ejected to a paper ejection tray 110 and stacked thereon.

Referring to FIG. 6 (3), when the fourth page of the original is supplied and the reading exposure operation is performed at the first reading position 21,
Assume that the recording paper on which this document is to be copied in the copying machine main body 100 becomes jammed near the photoreceptor 101. When a recording paper jam occurs in the copying machine main body 100 in this way, the original supply device 1 and the copying machine main body 100
The conveyance operation of the original and recording paper at 0 is temporarily stopped, and the occurrence of a paper jam is displayed to the operator on a display means called a jam map, for example.

Such a paper jam in the copying machine main body 100 is detected by a plurality of detectors provided along the conveyance path.

As shown in FIG. 6 (4), in this example,
The document supply device 1 is configured by a processing circuit 179 that responds to the output of the detectors Sll and S12, for example, when a recording paper jam is detected.
As a result, the document conveyance operation is restarted. However, the transport direction when restarting this transport operation is opposite to the transport direction when performing normal document image reading and exposure operation.
That is, the recording sheets whose conveyance has been stopped in the conveyance path of the document supplying device 1 are conveyed in a direction in which they are sequentially stacked on top of the documents stored in the document storage section 2. As a result, the document that has stopped midway through the conveyance path of the document supply device 1 is returned to the document supply end side of the document storage section 2.

The document is returned by the reverse conveyance operation of the document shown in FIG. 6(4) and FIG. 6(5), and the operator
6 (6) by removing the jammed recording paper.
As shown in <>, the document storage state in the document storage section 2 of the document supply device 1 is such that the conveyance operation was interrupted due to the aforementioned recording paper jam, and the document was not copied.
The sheets are fed in order from the fourth page), so that the reading exposure operation at the second reading position 21 can be started immediately.

As a result, the time from when the operator issues an instruction to resume the copying operation until the copying of a document that has not been copied is resumed is significantly shortened compared to the conventional method. In addition, there is a document storage section 2 in which such an interrupted copying operation can be resumed.
The operation time of the document supply device 1 required to restore the document storage state in the document supply device 1 is relatively short because the maximum number of documents that can be conveyed at the same time in the conveyance path of the document supply device 1 is about 3 to 4 sheets. Finish in time. In this way, the time it takes to return to a state where copying operations can be resumed after a paper jam occurs is
Significantly shorter time than before.

Therefore, even if a paper jam occurs during a copying operation, the time required to complete the copying operation is significantly shortened, and an efficient and rational copying operation can be performed. Such improvement in the efficiency of copying operations is particularly effective as the number of originals to be copied increases. Furthermore, as mentioned above, when a paper jam occurs, the number of documents that must be conveyed by the document feeder 1 is small, about 3 to 4, in order to be able to restart the copying operation. There is no need to perform feeding, and damage to the document during the return operation can be reduced.

FIG. 7 is a flowchart for explaining the above-mentioned return operation. In step n1, document supply device 1
When a document is placed in the document storage section 2 and the operator instructs the original to be copied by pressing the print switch 187, the process proceeds to step n2, and the document supply device 1 starts supplying the document. Then, the copying operation is started in the copying machine main body 100.

In step n3, the presence or absence of a recording paper jam in the copying machine main body 100 is determined based on the outputs of a plurality of detectors provided along the conveyance path. 0 It is determined that no paper jam has occurred. If so, the process advances to step n4 and the copying operation is continued.

In step n5, the end of the copying operation is determined based on the preset number of copies and the output of the detector S1 that detects one circulation of the original in the original supplying device 1. If it is not determined that the copying operation has ended, the process returns to step n3, and the above-described operations are repeated until the desired number of copies is obtained.

If it is determined in step n3 that a paper jam has occurred, the process proceeds to step n6, where the drive of the copying machine main body 100 is stopped and the conveyance operation of the document feeder ff is temporarily stopped. In step n7, the drive of the stopped document feeding device 1 is
The document is conveyed again in the opposite direction to the normal reading exposure operation, and the document that has stopped midway through the conveyance path is stacked on top of the documents stacked in the document storage section 2 and returned. It will be done.

FIG. 8 is a diagram for schematically showing another embodiment of the operation of a copying machine equipped with the document feeding device 1 according to the present invention. In this embodiment, as shown in FIG. A total of five originals arranged in layers of pages are stored in the original storage M2 of the original supply device L, and one recording paper P is stored in the paper feed cassette 106a of the copying machine main body 100. Assume that there is.

As shown in FIG. 8(2), five originals having an original image on one surface are stored in the original storage unit 2 with the first page on the lower side, so they are transported by the original supplying device W1. The document image is read and exposed at the second reading position 21. On the other hand, in synchronization with the reading and exposure operation of the fifth page of the document, recording paper P is transferred from the paper feed cassette 106a.
is supplied to the photoreceptor 101 and a copying operation is performed, and at this time the detector S provided in association with the paper feed cassette 106a
19 detects a state in which the recording paper P is consumed in the paper feed cassette 106a. Copying machine processing circuit 17
9, in response to the output of the detector S19, the document supply device 1
Then, the driving of the copying machine main body 100 is temporarily stopped, and the consumption state of recording paper is displayed to the operator on a display means (not shown) provided on the operation panel 175.

Next, as shown in FIG. 8 (3), the document supply device 1 resumes conveyance of the document that has stopped midway through the conveyance path in the opposite direction to the conveyance direction when performing the normal reading exposure operation, and starts recording. Documents stopped in the middle of the conveyance path due to consumption of paper P are sequentially stacked on top of the documents stacked in a document storage section 2, and documents that have not been copied are returned to the document supply end side.

Thereafter, in the state shown in FIG. 8(5) in which the recording paper consumed by the operator is replenished into the paper feed cassette 106a, the copying machine equipped with the 5M document feeder table moves the document that has not been copied. 4th page) and restarts the copying operation.

FIG. 9 is a flowchart for explaining the recovery operation when the above-mentioned recording paper is consumed. In step m1, a document to be copied is placed in the document storage section 2 of the document supply device 1, and when the print switch 187 is pressed by the operator, the process proceeds to step m2, where the document feeder 1 starts the document conveyance operation. Started, copying machine main body 1
At 00, the copying operation is started.

In step m3, the paper feed cassette 1 of the copying machine main body 100 is
The consumption state of the recording paper P at 06a is determined based on the output of the detector S9. If it is determined that there is at least one recording paper P, the process advances to step m4 and the copying operation is continued. In step m5, it is determined whether the copying operation is complete. If it is determined that the copying operation has not been completed, the process returns to step m3, and the above-described determinations and operations are repeated until the desired number of copies is obtained.

In step m3, if it is determined that all the recording paper P in the paper feed cassette 106a is consumed and there is no recording paper, the process advances to step m6, the driving of the copying machine main body 100 is stopped, and the conveying operation of the document feeding device l is stopped. Stop temporarily. In step m7, the document that has stopped midway through the conveyance path due to the consumption of the recording paper P in the paper feed cassette 106a is restarted in the opposite direction to the conveyance direction in the case of normal reading exposure operation, and is placed in the document storage section 2. The documents are sequentially stacked on top of the stored documents and returned. As a result, the originals stored in the original storage unit 2 are rearranged in a state where the interrupted copying operation can be resumed promptly.

Therefore, the operator only needs to press the print switch 187 after replenishing the paper feed cassette 106a of the copying machine main body 100 with the consumed size of recording paper P, to restart the copying operation of the original that was not copied. be able to. At this time, since the original for which copying is to be restarted (fourth page) is located at the top of the original supply bag W2, there is no original to be conveyed empty when copying is restarted, unlike in the conventional case, and copying is not completed. To shorten the time it takes to copy a document that has not been copied. In addition, the above-described operation of re-arranging the originals in the original storage section 2 of the original supplying device 1 only requires reversing and returning only the originals that have stopped midway through the transport path when the consumption state of recording paper is detected, and copying can be restarted. The time it takes to return to normal condition is also shortened. Therefore, the document feeding device 1 according to the invention
According to the copying machine equipped with the above, even if recording paper is consumed during the copying operation, an efficient and rational copying operation can be performed. The effect of the document relocation operation described above is particularly significant when the number of documents is large.

In the above embodiments, the present invention has been described with respect to a transfer type electrostatic copying machine equipped with the document supply device 1, but the present invention is not limited to a transfer type copying machine. The present invention can also be implemented in connection with.

Effects of the Invention According to the present invention, the control means of a copying machine equipped with a document feeding device detects abnormalities in the document feeding device, the recording paper feeding device, and the copying device in response to the output of the abnormality detection device that detects abnormalities in the document feeding device, the recording paper feeding device, and the copying device. Since the operation of the document supply means is controlled so that the document is conveyed along the document conveyance path in the opposite direction to the document conveyance direction and returned to the supply end side, the time from interruption to resumption of copying operation and copying The time from the restart to the end of the operation is shortened, and an efficient and rational copying operation can be performed.

This significantly improves the functionality of a copying machine equipped with a document feeder.

[Brief explanation of drawings]

FIG. 1 is a simplified sectional view showing the basic configuration of a transfer type electrostatic copying machine equipped with a document feeding device 1, and FIG. 2 is a simplified sectional view showing the basic configuration of the document feeding device 1. 3 is a perspective view showing the configuration of the exposure means 149, FIG. 4 is a block diagram showing the electrical configuration, FIG. 5 is a partial plan view of the operation panel 175, and FIG. 6 is an example of the operation according to the present invention. 7 is a flowchart for explaining the operation of one embodiment, FIG. 8 is a schematic diagram illustrating another embodiment of the operation according to the present invention, and FIG. 9 is a flowchart for explaining the operation of another embodiment. Flowcharts for explanation and FIGS. 10 and 11 are schematic diagrams for explaining operations in the prior art. 1... Original supply device, 2... Original storage unit, 3...
Paper feeding means, 5, 6... Support cylinder, 8... Original reversing means, 20° 21... Reading position, 101... Photoreceptor, 1
06a-106d...paper feed cassette, 109a-10
9d...Paper feed roller, 110...Ejection tray, 14
9... Exposure means, 175... Operation panel, 179.
...Processing circuit, 187...Print switch, D...
・Manuscript, P...recording paper, 81-S22...detector

Claims (1)

[Scope of Claims] A document in which a document conveying path is formed for supplying stacked documents from one supply end in the stacking direction to an exposure position and returning the exposed documents to the other storage end. supplying means; recording paper supplying means for supplying recording paper on which an original is to be copied; copying means for copying the original brought to an exposure position by the original supplying means onto recording paper; the original supplying means, recording paper; Abnormality detection means detects an abnormality in the paper supply means and the copying means; and in response to the output of the abnormality detection means, the document supply means is operated, and the original document being conveyed is moved along the document conveyance path in the document conveyance direction. What is claimed is: 1. A copying machine equipped with a document feeding device, characterized in that the copying machine includes a control means for controlling the document feeding device to be conveyed in a direction opposite to that of the document feeding device and returned to the feeding end side.