JPH03182769A - Copying machine provided with document feeding device - Google Patents

Abstract

PURPOSE:To shorten the time extending from the interruption to the restart and extending from the restart to the end by carrying a document whose copying is not completed yet on the way of carrying in the direction opposite to the carrying direction and returning it to the supply end side, when abnormality of a document feeding means, a recording paper feeding means and a copying means is detected. CONSTITUTION:Abnormality detecting means S7 - S22 detect such abnormal states as, for instance, a paper jam of a document D or recording paper P, consumption of the recording paper P to be supplied or a fault of a copying means, etc., generated in a document feeding means 1, a recording paper feeding means 3 and the copying means. A control means controls an operation of the document feeding means 1 so that the document D which is on the way of carrying in a document carrying route 14 of the document feeding means 1, and whose copying to the recording paper P is not completed yet or whose copying is not executed is carried in the direction opposite to the carrying direction of the document D along the document carrying route 14 and returned to the supply end side, in response to an output of the abnormality detecting means S7 - S22. In such a way, when the abnormal state is generated, the time until the interrupted copying operation is restarted and the time until the restarted copying operation is ended are shortened.

Description

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

BACKGROUND OF THE INVENTION FIG. 9 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 main body of the copying machine. In FIG. 9, a copying operation is performed when obtaining recording paper on which corresponding copied images are formed on both sides (hereinafter referred to as "double-sided recording paper") from a document having original images on both sides (hereinafter referred to as "double-sided original J"). The same reference numeral B is given to the members corresponding to the embodiments described below.

As shown in FIG. 9 (1), a plurality of double-sided originals arranged in order of page number are stacked in the original storage section 2 of the original supply device I with the first page facing downward. The paper feed roller 12 starts feeding one document at a time, for example, from the fifth page and the sixth page located at the top.

As shown in FIG. 9 (2), the supply operation has started.
The seventh document is conveyed to the first reading position 20 and one side (
In synchronization with the document feeding operation of the 0M document feeding device 1, in which the document image of the sixth page) is read and exposed, in the copying machine main body 100, the recording paper P is transferred from the paper feed cassette 106a to the paper feed roller 109a.
The originals are conveyed to the photoreceptor 101, and a copying operation is performed on each original in order from the even n side.

Now, as shown in No. 911Z (3), the 6th part of the manuscript
Assume that after the copying corresponding to Makoto is completed, in the copying operation corresponding to the next 4th page, the recording paper on which this 4th page is copied becomes jammed near the photoreceptor 101. . When a recording paper jam occurs in the copying machine main body 100 as described above, the operations of the original supply device 1 and the copying machine main body 100 are 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 according to this paper jam display, the document feeding device 1 detects the document that stopped in the middle of the conveyance path when the paper jam occurred and the document that has not yet been fed. are circulated without reading and exposing operations, and 11M storage 7! Returned to r2.

As a result, in the document storage section 2, all aa are rearranged to the original storage state, as shown in FIG. 9(4).

Then, when the operator again instructs to restart the interrupted copying, the document supplying device 1 sets the state in which the document at the time of the interruption of the copying operation (3rd page and 4πth page) will be supplied next from the document storage section 2. Through this operation, the copying machine main body 100 including the document supply device 1 resumes the interrupted copying operation by performing a so-called empty conveyance operation in which the already copied original is conveyed without being read and exposed.

Problem to be Solved by the Invention As explained in FIG. 9, in the conventional technology, the document feeder can only operate in one direction.
When a paper jam occurs in the printer or when the recording paper P is consumed, it takes a long time until a copying operation that has been interrupted due to some other abnormal situation is restarted. That is, the document stopped in the middle of the conveyance path at the time of interruption and the unfed document are empty-fed and re-arranged in the document storage section 2.The document at the time of interruption is at the first reading position W! 1. It is necessary to repeatedly feed other original documents until the document is conveyed to 20. ), when there are a large number of originals, it takes a long time to restart copying work f1 after it is interrupted. Furthermore, there are other problems such as a large amount of time required after the copying operation is restarted and until the copying operation is completed after the interruption.

An object of the present invention is to prevent copying when the copying operation is stopped due to the occurrence of common problems 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 time required to recover to a state in which IJ production can be resumed and the time required to complete copying operations.

Means for Solving the Problems The present invention supplies stacked originals to an exposure position from the supply end side in the stacking direction, and returns the exposed originals to the storage end side on the side. A copying device for copying the document brought to the exposure position by the document supplying device into the exposure position 11#E. With means.

abnormality detection means for detecting an abnormality in the original document supply means, the recording paper supply means, and the copying means; and in response to the output of the abnormality detection means, the original document supply means is operated, and copying is completed during conveyance. 1. A copying machine equipped with a document feeding device, characterized in that the copying machine includes a control unit that transports a document that has not been read on a document feeding path in a direction opposite to the document feeding direction and returns it to a 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 NW4 supplying means onto the recording paper supplied by the recording paper supplying means. The document is returned to the storage end side by the document supply means.

The 5% constant detection means is the document supply means, the recording paper supply means j3
Problems that occur in copying devices, such as paper jams of originals or recording paper, or disappearance of recording paper to be supplied! ! Alternatively, an abnormal situation such as a failure of the copying means is detected. 1tIIIn
The means is configured to detect, in response to the output of the abnormality detecting means, a document that is being conveyed in the document conveying path of the document supplying means and that has not been copied or has not been copied onto the recording paper to be copied. The operation of the document supply means is controlled so that the document is conveyed along the document conveyance path in a direction opposite to the direction in which the document is conveyed and returned to the supply end side.

In this way, the redundant detection means detects an abnormality! The original for which exposure and copying were not completed when the Xr state was detected,
Since the document is returned to the supply end side, after the abnormal situation is handled, the document whose copying was interrupted and was not performed can be promptly supplied to the exposure position, and the copying operation can be quickly resumed. Therefore, in a copying machine equipped with a document feeding device, when an abnormal Ir state occurs, the time until the interrupted copying operation is resumed and the time until the restarted copying operation is completed can be shortened by 1 m, and copying efficiency is improved. and functionality is greatly improved.

Embodiment FIG. 1 shows a transfer machine equipped with a circulation type document feeding device 1! X2
1 is a simplified cross-sectional view showing the basic structure of an electrostatic copying machine. At the center of the interior of the copying machine main body 100, a right cylindrical photoreceptor 101 is rotatably disposed.

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 circulation type document supply device ll is provided on the upper surface of the copying machine main body 100, and is connected to the first support tube 5 and the second support tube of the document supply bag W11.
A first reading position 20 and a second reading position 21, which are respectively configured vertically below the support f12r6, are provided in parallel in substantially the same plane on the upper surface of the main body 100.

Further, on the upper surface of the copying machine main body 100, a bound @
Third reading position r corresponding to nationality etc. ! 105 is provided to constitute an exposure means 149 capable of two-system reading n-destination method.

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 for feeding originals one by one from the original storage unit 2;
, a straight rrrlrrJ-shaped first support cylinder 5 that conveys the original along its outer peripheral surface and faces one surface toward the first reading position 20;
Second reading of the other surface of the transported document II! a right cylindrical second support tube 6 facing the position 21; a document conveyance means 7 for conveying the document from the document storage section 2 to the first support tube 5; The conveyance state of the document is reversed so that the surface interposed between the first support tube 5 and the second support tube 6 and facing the second reading position 21 becomes the other surface of the one surface facing the first reading position 20. The apparatus includes a document reversing means 8 and a document storage means 9 for returning the document from the second support g6 to the document storage section 2.

The document storage unit 2 stores, for example, a plurality of sheet-like document documents that have original fA images on both sides and are arranged in 1-sized page numbers, with one end (the left end in FIG. 1) of the original documents. In a state in which the originals are aligned by the set aligning member 10, the side of the original with the smallest number of pages is placed on the original transport belt 11 by $1 and accepted. In order to separate and feed the originals placed in the original storage part 2 one by one to the original transport means 7, starting from the topmost original, a document feeder 3 is provided above the original storage part 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. This allows the manuscript Do
The documents are separated and fed to the document conveying means 7 in order.

The document conveying means 7, into which documents are fed one by one from the document storage section 2 by the paper feed roller 12, is provided with a conveyance path 14 bent from the horizontal direction to the downward vertical direction, as shown in the figure.

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 driven to rotate in the direction of conveying the original, and the lower roller 15b is driven to rotate in the direction of returning the original.By passing between these rollers 15a and 15b, the original is reliably loaded one by one. Separated into transport route 1
Sent to 4. This conveyance path 14 includes a pair of conveyance rollers 16a, 16b, 16c, spaced apart in the conveyance direction.
16d will be installed.

These pairs of rollers 16a to 16d each have an original T.
The rollers 16a to 1 are rotatably in contact with both sides of the AD.
6 (1) is forcibly rotated by the document conveyance motor M3, the document D'J!: is conveyed in the direction of the flint 17 along the conveyance path 14 while being guided by the above-mentioned rollers. , a document feeding detector S2 is installed, and a 1st t! position pre-detection Thj S3 is installed near the exit side.

In addition, the exit portion of the conveyance path 14 (near fM of the first support cylinder 5)
) includes a pair of first registration rollers 19a.

191) will be installed. This first registration roller 19a,
19b is a clutch CLT on the drive shaft (not shown).
I, and the ON/OFF state of clutch CLTI is connected via I.
Rotation is stopped by off control and rotation is performed again. The on/off control of clutch CLTI is ii+ controlled according to the contents of copying desired by the operator. That is, when it is necessary to read a document, rollers 19a and 19b are used to synchronize with the conveyance of recording paper in the copying machine main body 100.
The rotation of the document tray is stopped and the document tray is placed on standby, and after synchronization is established, the document tray is rotated again and the document tray is conveyed to the first support cage 5.

On the other hand, when it is unnecessary to read the original T:4D, the rollers 19a and 19b are always rotated simply as transport rollers like the other transport rollers, and the original is passed through without stopping.

Note that, when the first lubrication rollers 19a and 19b simply operate as conveyance rollers, the second luzi roller 1 is moved by a length less than the maximum allowable length 11 of the document to be conveyed.
Conveying roller 1 located upstream of 9a and 19b in the conveying direction
The rotation of 6C, 16 (1) does not stop until the conveyance of the original document is completed.

On the other hand, when the first lug rollers 19a and 19b operate as register rollers that keep the document on standby and adjust the timing of conveyance to the first support cylinder 5, the conveyance rollers 16c and 16d at the above positions are used. The rotation of is also 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 IGc and 16d is also stopped, and the conveyance of the original is resumed.

The position for reading the document image on the document tray is a first reading position 120 that corresponds 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'1
120 and the second? The take position 21 is located on the same plane as shown in the figure.

Each of the support cylinders 5 and 6 includes a document transport motor M4.
．． The M5 rotates in one direction at a speed synchronized with the speed of copying onto the recording paper. In addition, each support tube 5, 6 has
Driven rollers 22a to 22d, 23; L to 23d are installed along the outer circumferential surface at predetermined intervals, and these driven rollers press and wind the document onto the outer circumferential surface of each support cylinder 5.6. Then, the document is conveyed along circular conveyance paths 20a and 21a formed on the outer peripheral surface of the support cylinder 5.6.

A hard transparent glass plate 24.25 is installed vertically below the circular conveyance lines 120a, 21a to constitute the first and second reading positions 1ff720.21.

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 the second I2I, the upper surface of the document tray stacked in the document storage section 2) ) is read and exposed to form an i-image corresponding to the large surface.
When passing between the second support cylinder 21 and the second transparent glass plate 25, the other surface of the document tray (the lower surface of the document tray in the document storage section 2) is read as described later. A corresponding image is formed on the other surface by exposure.

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 d-taking position 20 via the m reverse path 14 of the document conveying means 7 while being wrapped around the first support tube 5 by the rotational force of the first rollers 19a and 19b. Between the first support tube 5 and the second support tube 6, as shown in the figure, there is a front-back reversal diameter that changes the surface of the document facing the reading position! 0 front/back reversing path 30 in which a document reversing means 8 having a document reversing means 8 having a document reversing mechanism 1130 is disposed (from opposing parts of the circular conveyance path 20 a + 21 ct of the first support cylinder 5 and the second support cylinder 6). h Upward l\first path 30a extending obliquely
and second route 301], and these routes 30a, 30b
and a third path 30c extending horizontally to the left from the confluence point.

A direction changing air 31 is installed at the entrance of the first path 30a that is continuous with the circular conveyance path 20a of the first support cylinder 5. This direction changing air 31 is operated by the solenoid 5OL1 to move the original v4D to the first direction n30a or the first document support 1! It is selectively transported to the circular transport path 20a of j5. That is, if the original document passing through the first reading position 20 is to be exposed to -degree reading according to the content desired by the operator, the direction changing air 31 is operated to the solid line position in FIG. is transported to the first path 30a. On the other hand, if reading exposure is required multiple times, the direction changing air 31 is operated to the position indicated by the line 2 and ii, and the document is transported multiple times along the circular transport path 20a of the first support f55.

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
At 0a, a first reading position f&detector S4 for detecting the rear end of the original document tray in the conveying direction, a pair of rollers 34a and 34b, and a direction changing wind 35 are installed in order from the upstream side of the document tray in the conveying 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 through the direction changing wind 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 move the document from the direction changing wind 35 along the arrow 4 within the third path 30c.
After being conveyed in the direction 0a, when the rear end of the document tray in the conveyance direction passes through the direction changing wind 35, the rotation of the motor M6 is reversed to convey the document tray in the direction of the arrow 40b.

The direction changing wind 35 is brought into the state shown by the solid line in FIG.
While closing the route 30a, opening the second meridian 130b,
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, which is conveyed by being pressed against the roller 34a by the OL 3 and holding the document between them, is realized using the forward and reverse rollers 36 and 37, but for example, a belt conveyor 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 detection 2:+95 for detecting the passage of the leading edge of the document in the m-feeding direction is installed at a position on the downstream side in the conveying direction with respect to the roller 34c.

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 the original document, in order to synchronize with the recording paper, the rotation of the rollers 59a and 59b is stopped and the original document is placed on standby, and after synchronization is established, the original document is rotated again and the second document is read. The document is conveyed to the support station 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.

19t), the transport roller 16c, and the IGd.

That is, the second registration roller 59a.

When the roller 59b simply functions as a conveyance roller, a conveyance roller 36 for conveying the document to the second support cylinder 6,
37 does not stop until the tIi feeding of the document tray is completed. On the other hand, when the second registration rollers 59a and 59b work as registration rollers, the leading end of the document tray in the conveying direction is aligned with the roller 59a. , 59b,
The rotation of the transport rollers 36 and 37 is temporarily stopped. after that,
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 original document in the front-back reversing path 30, the one surface of the KT:4D that has already faced the first reading position 20 faces the outer circumferential surface of the second support tube 6 and is wrapped around it. The document is then transported by the second support tube 6 with the other surface of the document tray that does not face the reading position facing the outer surface. Therefore, the 21st! At the position 1ff21, the other surface of the document tray is read with light a, and an image corresponding to the other surface is formed. Note that the reading exposure operation at the second reading position 21 may not be performed and the document tray may be allowed to pass 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 document which has passed through the second T1 taking position 21 branches from the circular carry-in path 21a to the conveyance path 45 of the document storage means 9. This direction change pawl 46 is actuated by a solenoid 5OL4, and the circular conveyance path 21
Selectively open and close a.

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 'n21a is opened and the document is conveyed to the conveyance path 45. On the other hand, when performing multiple reading exposures,
After the conveyance path 1845 is closed and the document is conveyed the required number of times on the circular conveyance path 21a, it is 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. In addition, since the first reading position 20 and the second z position 521 can be read and exposed the required number of times, multiple originals can be read and exposed.
f: You can make multiple copies of the fID as needed.

From the second reading position 21 I! In the document storage section rl 9, the In feed path 15 is connected to the lower end of the conveyor belt 11 so that the original document is not returned to the document storage section 2.
D is conveyed to the conveyor belt 11. Zunawachi.

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, there is a pre-document storage detector S6 for detecting passage of the document.
Set up. The operation of the conveyor belt 11 and document storage means 9 is controlled by the detection signal 13 from the detector S6.

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

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 portion of the conveyor belt 11 also serves as a document placement section. Also, a document drawing roller 56 is located close to the transport path 45! The document is placed on the conveyor belt 1 by the conveyance force between the original document and the conveyor belt 11.
It is sent between the overhanging rack part 1 and the bottom of the original tray placed 11.

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 and manuscripts is reliably widened at the lowermost end.

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, in the document storage section 2, a detection IY moving member 60 made of, for example, a mirror-finished stainless steel plate is disposed in order to detect one cycle of the placed document. This actuating member 60 is at the lower end position shown by the solid line in FIG. 1 before the operator places the original 'vID in the document storage section 2, and the document tray is placed on it. As the originals [) are fed one by one from the original storage unit 2 and returned again, the actuating member 60 gradually moves upward (lI!I
l\displaced, and there is an intervening tCL between the last-fed original and the re-stored original.
, , to distinguish between the two. When the original v4D goes through one cycle, 11: Moving part $460 is 2 points m! Reach the top level indicated by .

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.
The circulation detector Sl detects the n output state and generates a detection signal indicating that the -circulation has ended. This detection signal is used to control the operation of the copying machine main body 100m, such as copying the number of copies desired by the operator. Thereafter, the actuating member 60 is driven by the actuating member drive motor M1.
The plate is rotated 80 degrees and returned to the lower position 1 (original position) with respect to the original plate.

With the configuration and operation described above, the document supply bag [1] transfers the documents stored in the document storage section 2 to the document transport means 7.
, first support cylinder 5, document reversing means 8, second support g6. While conveying each original to the first and second reading positions ra 20° 21 in this order, each original is conveyed in this order to the original document storage means 9 so that each original image is read and exposed.

Furthermore, in this embodiment, in addition to the above-mentioned operation of transporting originals in the hall, the configuration is such that the original can also be transported in the opposite direction in case an abnormality is detected in the copying machine during transport. be done. That is, the motors M3 to M5 disposed in the original document feeder T1.1 are selected to be capable of forward rotation as well as reverse rotation.

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

37b and the support cylinders 5 and 6 rotate in the opposite direction, thereby transporting the original in a direction opposite to the normal transport direction. At the same time, the solenoids SOL1-3QL4, etc. are also driven, and the direction changing claws 31, 35, 46, roller 34c, etc. are moved to convey the document in the opposite direction.

Therefore, although the original feeding operation of the original feeding device 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, the operation of the original feeding device 1 is restarted after that. When doing,
The m-feed 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 on the conveyance path. As a result, the originals in the original storage section 2 are stored.

The original document whose copying was interrupted and was not performed is quickly rearranged so that it can be supplied with the read value fi20.21.

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 source light from 50 is irradiated onto the document tray iiigA, the reflected light passes through the reflection jia 151a to 151d and the lens 152, and forms an image on the exposure area 130 of the photoreceptor 101.

The exposure means 149 moves to the first reading position 122 directly below the first support cylinder 5 in accordance with the conveyance of the document in the document supply bag rIt1.
0 and the second reading position 21 directly below the second support tube 6 are read and exposed in a stopped state, and books etc. are placed at the third reading position 105! 1, the light source 150 and the reflection 5
The first mobile body 71 equipped with J1151a is the 31st! In these two reading exposure methods, in which reading exposure is performed while scanning the taken position, the exposure means 149 is driven by a driving motor M13.
This is done by driving.

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 moving body 72, a pair of guide shafts 73, 74 supporting each moving body 71, 72, and each moving body 71, 72.
and a power transmission section 75 for performing the movement. The first moving body 71 and the second y-moving body 72 form a pair, and the first moving body 71 includes a light source 150 and a reflection R151a.
(See Figure 1) is fixed! Sign. C, reflecting mirrors 151'b and 151c are fixed to the second moving body 72. Through holes are provided on both sides of the pair of movable bodies 71 and 72, and guides l[[173, 74 are pushed through the through holes. Therefore, the movable body 71.72 is movable tS in the axial direction of the guide shaft 73.74.

A wire fixing member 7 is attached to the ff1 portion of the first fJ moving body 71.
6 is provided, and a portion of the flexible wire 77 is fixed. Wire 77 is stretched between pulleys 78a and 78b. Furthermore, the wire 77 is wound around a pulley 79. Eight flexible wires 80 are connected to this pulley 79 and the rotating shaft of the DC motor M13. , will be. Therefore, the forward and reverse rotational power of the DC motor M13 is transmitted to the pulley 79 via the wire 80, and the wire 77 is further connected to the collar 81.
By being rotationally driven in the a direction and the arrow 81b direction, the first moving body 71 moves along the guide shafts 73 and 74. At this time, the second moving body 72 moves fja 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. The first and second reading positions 20 and 21 and the third reading position 10 shown in FIG.
On the lower side of s7. ss,
s9 are provided respectively. Home position detection? i
s7. S8. S9 is realized, for example, as an optical detector that forms an optical path between a light emitting element and a light receiving IA element.

When the detected piece 76a approaches the detector S7, the optical path is cut off by 31, and the processing circuit built in the copying machine activates the DC motor M13 based on the detection f3 from the detector S7.
The rotation of the first moving body 71 and the second moving body 7 is controlled.
ff1l control such as stopping the movement of 2 is performed.

Second reading position again! A detector S8 similar to the detector S7 is also provided on the lower side of the TJ 21, and when the detected piece 76a approaches, a signal that flashes on the movement of the first TJ moving object 71 and the second moving object 72 is detected. Output. Furthermore, at the lower side of the third reading position 105 where books and the like are read and exposed, the 19th moving body 71 is scanned open (the detector S7 is located at the 11? position).
A detector S9 similar to the above is provided. As a result, signals necessary to start scanning the first moving body 71 and the second moving body 72 are output.

Referring to FIGS. 1 and 2, the first registration rollers 19a, 19b and the second registration roller 59a described above
, 59b is performed as a registration roller or as a mere transport roller, for example, in the home position/detection 3S7. S8
Based on the detection number 13 from the processing circuit in the decision making machine.
), i.e. light! ? The first to which the X150 is fixed
The detected piece 76a of the moving body 71 approaches the detector S7,
When the light source 150 is set directly below the first reading position 20, the first registration rollers 19a and 19b operate as registration rollers, and 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 first Luzi roller 19a.

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 imaging light means 149 forms an image on the charged photoreceptor 101 in the exposure area 130, forming an electrostatic latent image corresponding to the read original image. 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 transferred to the fixing device by the conveying means 132! The image is transported to 104 and fixed.

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, the residual charge on the photoreceptor 101 is released by a removal device 134, and then the surface of the photoreceptor 101 is charged by a charging discharger 102 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, the paper feed cassette 106c and LO6d are located in the lower part of the
is loaded. In addition, these paper feeding power cellars l-106a~
106d includes a detector S19.19 to detect the consumption state of the stored recording paper P. S20. S21. S22 is provided respectively.

The recording sheets P stacked in the paper feed force cellars 106 a to 106 d are picked up one by one in order from the topmost sheet to paper feed B paths 108 a to 108 (
Paper is fed to 11. This paper feeding operation is performed in each paper cassette 1.
Paper feed roller 10 arranged on the upper surface of 06a to 106d
9a to 109d are rotated by paper feed drive motor M8 N! @
done by being done.

The paper feed paths 108a to 108d and the intermediate l described later
- Paper conveying rollers 107a to 107e are installed in the paper feeding path 115 of the tray 113, and by rotationally driving these conveying rollers with a drive motor M9, the recording paper P is fed to the copying process section. do.

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 way 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, m-feeding of the recording paper P is temporarily stopped.

The reading exposure of one surface of the original MID is the first reading 1W12.
0, the first lug rollers 19a and 19b in the document feeding device 1 feed the original v4D(1)m at 'U1'.
The second registration rollers 59a and 59b operate as rollers for conveyance to Jll. The original is placed on the first registration rollers 19a, 19b, and the recording paper P is placed on the third registration rollers 160a, 160a.
After once stopping at 60b, for example, the first lugistroller 19a.

1, 9 After rotating b to start conveying the document,
After a predetermined set time has elapsed, the third registration roller 1
60a and IGOb are rotationally driven to start transporting the recording paper P.

This set time is the same as that of the first Luji roller 19a.

191", the document sheet is moved to the first reading position 20 and exposed to light as described above, and a toner image formed on the photoreceptor 101 corresponding to the document image is transferred. The downstream end in the moving direction is the transfer closed area 1291\
The time is set as the time taken to arrive, minus the time from when the recording paper P starts being conveyed from the third registration rollers 160a, 160b until the leading edge in the conveyance direction reaches the transfer area 129 ff'1. , for example, by a timer in the MHeA 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 original plate is the 21st! When carried out at the taking position 21, the first lug rollers 19a, 19b
act simply as conveyance rollers, and second registration rollers 59a and 59b act as registration rollers. The relationship between the timing of conveying the original by the second registration rollers 59a, 59b and the timing of conveying the recording paper P by the third registration rollers 160a, 160b is as follows. The same JgI relationship with 160a and 160b is set. Note that the third register roller 160a as described above
, 160b are controlled to rotate/stop 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 Tll 04 through the copying process to the ejection tray 110, and a recording paper front-back reversal path 18112 branched from the ejection path 111. It will be done. The recording paper P, which has passed through the copying process and the fixing device 104 and has been copied corresponding to the original image on one side, has the copy content L desired by the operator: (i) to (
iii) (Q 3 types) PAalte discharge tray 110
is discharged to.

(i) It passes through the discharge diameter 28111 as it is and is discharged to the discharge tray 110.

(ii) After heading to the ejection path 111, in order to make a copy on the other surface of the recording paper P, the recording paper front and back reversal path 112
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 conveying path 115 by a sheet feeding means 114 which is rotationally driven by a motor M14 in order from the lowest sheet to the fixing device. 104, discharge route 1
11 and is discharged to the discharge tray 110.

(ii) After heading toward the ejection path 111, the recording paper P is reversed in the recording paper front/back reversing 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 IL2c and a path IFt 112d that branches from this path 112C and heads toward the middle E I-ray 113. The above sutra 2
A first direction changing claw 115 is provided at a portion where I1112a branches from the discharge route 111, and a first direction changing claw 115 is provided between the route 112a and the route 112.
A second direction changing pawl 1.16 is provided at the confluence site with path 1.
A third direction changing pawl 117 is provided at each branch point between the path 12C and the path 112d. These first to third direction changing claws 115 to 117 are actuated by drive solenoids 5OL5, 5OL6, and 5OL7 (not shown), respectively, and the conveyance path of the recording paper P is selected according to the copy content desired by the operator.

Rollers 118a, 118b, and L18c are disposed near the confluence of the route 112a and the route 112b, and
A roller 1 is installed near the branching point between i112c and route 112d.
19a, 119b, and 119c are provided to convey recording paper P, respectively. 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 conveyance direction of the recording long paper P. A reversing roller 12 is provided below the branching part between the path 112c and the path 112d.
1 is provided, and is rotated in forward and reverse directions by a drive motor M12 (not shown). Furthermore, a discharge detector S13 is installed near the exit of the discharge path 111, recording paper reversal detectors S14 and S15 are installed near the entrance of the path 112a and path 112C, and intermediate tray entrance detectors are installed near the exit of the path 112d. Vessel S1
6 are arranged respectively.

Due to the configuration of the recording paper front/back reversal path 112 described above, in the case of the discharge mode (i) above, the first direction changing claw 115
The path 112a is closed to the ejection path 111, and the recording paper P is ejected along the ejection path 111. Above (11)
In the case of the embodiment, the discharge diameter n11 is set by the first direction changing claw 115.
1 is closed, the recording paper P is introduced into the path 112a, and the second
The direction changing claw 116 opens the route 112C, and the route 112
At c, 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 (i;) above, the recording paper P is routed 1 as described above.
12c, the conveyance direction is reversed by the reversing roller 120, the BB 112a is closed by the second direction changing claw 116, while the path 112b is opened, and the sheet is led out from the path 112b to the discharge path 111.

In this copying machine, in order to detect the conveyance state of the recording paper P in each part shown in FIG.
x S 12 , intermediate tray paper presence/absence detector S17;
An intermediate tray paper feed detector 318 and the like are provided.

Kekkatazawa equipped with the above-mentioned circulating automatic document feeder 1,
Depending on the duplication content desired by the operator, (A) single-sided copies sorted into multiple sets from a single-sided original (B) double-sided copies sorted into multiple sets from a single-sided yX draft (C) double-sided copies sorted into multiple sets from a double-sided fy, draft Single-sided copying (from D> double-sided original?! 1&) In both sorted double-sided copying, it is possible to make white copies by circulating the original multiple times.

Also, depending on the contents of the copy desired by the operator, I! It is also possible to read and expose an X document while wrapping it around a support cylinder multiple times, and to copy a plurality of sheets in one document.

4I2I is a block diagram showing the electrical configuration of the 1lil control device that controls the copying machine main body 100 and the document supply device 1. Motors Ml, M2 . M3. . . , are connected to the motor drive circuit 170. Clutches CLTI, CLT2, CLT3, etc. are used to synchronize the conveyance of the original document conveyed within the document supply device W11 and the recording paper P conveyed within the copying machine main body 100. . . . are connected to the clutch drive circuit 171. Solenoid 5OLI that operates the direction changing claws 31, 35, etc. in the conveyance path
,S.

L2. . . . are connected to the solenoid drive circuit 172. These drive circuits 170 to 172 include a DC power supply 173 and detectors Sl, S2 . S3. etc., an optical system drive circuit tP1174 that moves the exposure hand 1'1149, an input operation key 176 on the operation panel 175 provided on the copying machine main body 100, and a display drive that drives the display device on the operation panel 175. It is connected to the interface circuit 178 along with the circuit n177 and the like.

The interface circuit 178 is connected to the processor F1[1li118179 realized by a microcomputer or the like, and sends the detection signal from the detection circuit to the processing circuit 179, and also sends the control signal from the processing circuit 179 to the various drive circuits 170. ,171°172.174,17
Give to 7. The processing circuit 179 includes a read-only memory (nOM) 180 and a random access memory (AM).
181 is connected. Processing circuit 179 includes memory 1
According to the control program stored in advance in 80,
The memory 181, which controls the copying operation, is used as a calculation area for counters, timers, flags, etc., which are necessary for controlling the copying operation, for example.

Further, the interface top 42 circuit 178 is the optical system drive circuit 17.
4, the exposure means 149 is moved through each reading position 20,
21. Controls the lighting 7/extinguishing of the light source 150 and the lighting level in 105.

More ink face episode i? 3178 is operation panel 1
A signal from the input operation key 176 on the t! It is displayed on the display means 182 provided on the fji panel 176. Furthermore, in the interface n178, a selection switch SSW l-8SW4 for selecting the type of copy R is connected as a part of the operation panel 175. These include double-sided copying from a double-sided original, single-sided copying from a double-sided original, and double-sided copying from a double-sided IrC 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 RAL, and operations for copying by fixing the original and moving and scanning the optical system. ADF key 186 to perform copying, a print switch 187 to give an instruction to start copying, a setting M number display section 188, a copy number display section 189, copy R mode display sections 190 to 193 using the document supply bag E1, and further drive the optical system. It has an ADF display section 194 that shows the read exposure operation state.

The copy B type display sections 190 to 193 are used when making a single-sided copy from a single-sided original, or when making a double-sided copy from a single-sided original.
When making a single-sided copy from a double-sided original.

Each time one of the six selection keys 185 indicating one of the copy modes 411 is pressed once when making a double-sided copy from a double-sided original, one light emitting element lights up in order from the top, and the copy mode to be matched is selected. Ru. 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 to be copied 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. Original TA U', feeding device 1
Copying when not using, for example, a bound book 2''
In the case of copying, such as 5, the light emitting element of the ADF display section 194 lights up by the pressing operation f1: of the ADF, -IE--186, and the fat light means 149 runs against the original placed 11% at the third reading position 105. A copying mode in which a reading exposure operation is performed by driving is selected.

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 "O" 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 one embodiment of a copying operation in a copying machine equipped with the document feeding device 1 according to the present invention. As shown in FIG. 6(1), when copying to obtain double-sided recording paper from a plurality of double-sided M documents arranged in anti-numeric order using the yX document supplying device 1, for example,
The original image of the first page is placed in the original storage unit 2 so that the image of the first page faces downward.

As shown in FIG. 6 (2), when the operator instructs the operator to start the copying operation, the paper feed roller 12 starts feeding the original. In this embodiment, the copying operation of a double-sided original is considered. Therefore, each even-numbered page of the transported document is
The images of the even-numbered pages of the original are sequentially read and exposed from the sixth page at the first reading position 120 onto the document conveyed by the support tube 5 .

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 101 by the supply roller 109a in synchronization with the document supply operation and reading exposure operation of the document supply device 1. is supplied and copied. After copying, the recording paper passes through a recording paper front-back reversing path 112 and is then temporarily stored in an intermediate I-ray 113.

Sixth [As shown in Z (3) and (11) of the same figure,
The exposed document (fifth page tJ and sixth page) from the first support tube 5 is conveyed to the second support chamber 6 by the document reversing means 8, and is transferred to the first support tube 6. +1 for 5 is the next manuscript (3rd responsibility tJ
and the fourth page) are conveyed. The document image of the fourth page is read and exposed by this iL, and is copied onto the recording paper P from the supply tray 106a.

The fifth page of the document conveyed by the second support cylinder 6 is returned to the document storage section 2 without being read and exposed at the second reading position 21 . Further, the recording paper on which the fourth page of the original has been copied is transferred to the intermediate tray 1 through the recording paper front-back reversing path 112.
It can be stacked up to 13.

By sequentially repeating such operations, as shown in FIG. In the document storage section 2 of the supply device 1, w
The original document that has been circulated through the i-ring path once is stored in the state in which it was initially stored.

Then, as shown in FIG. 6(6), the second circulation of the document feeder is started. The document conveyed at this time is conveyed to the document reversing means 8 and its front and back surfaces are reversed without being subjected to a reading exposure operation at the first reading position 20. Thereafter, the original from the original reversing means 8 is moved by the second support cylinder 6, and the images of the odd pages of the original are sequentially read and exposed at the second reading position 21.

On the other hand, in the copying machine main body 100, the recording sheets P stored in the intermediate l-ray 113 are sequentially supplied to the photoreceptor 101 by the conveying means 114, starting from the lowest one. As a result, the original image of each odd-numbered page of the corresponding original is copied onto the other surface of the recording paper P on which each even-numbered page of the original is copied on one surface, and the recorded paper P after copying is placed in the ejection tray. 110. Such an operation (Fig. 6 (7)
) and (8) of the same figure are performed in sequence, and as shown in FIG. P is obtained.A two-sided document tray is stored in the document storage section 2 of the document supply device 1 in the state in which it was initially stored.

Next, referring to FIG. 7, during the copying operation, the copying machine main body 10
A description will now be given of the operation when an abnormal situation such as a recording paper jam occurs when J3 is within 0. As shown in FIG. 7(1), a total of five double-sided originals, Tr and fj6 in the document storage section 2 of the document supply device 1, are placed so that the first page faces downward. The copying operation is started in response to an instruction to start copying using the JP name.

As shown in No. 7U2 (2), when making double-sided copies from double-sided originals, the originals are transported from the original storage section 2 in order from the topmost one, and are transported by the first support tube 5. When reading, the images of each even-numbered page of the document are sequentially read and exposed at the first reading position 20 . On the other hand, in the copying machine main body 100, the recording paper from the supply tray 106a is conveyed to the photoreceptor 101 and a copying operation is performed, and the recording paper after copying passes through the recording paper reversing path 112 to the intermediate tray
It is temporarily deposited and stored in 3.

Referring to FIG. 7(3), while the fourth page original image is being read and exposed at the first reading position 220, the recording paper on which this original image is to be copied is placed on the photoreceptor in the copying machine main body 100. Assume that a paper jam occurs near 101. When a recording paper jam occurs in the copying machine main body 100 in this way, the operation of conveying the IrC document (?), the original and the recording paper toward the feeder l and the copying machine main body 100 is temporarily stopped, and the operator is informed A paper jam will be displayed.

Such a paper jam in the copying machine main body 100 can be detected by a plurality of detectors SIO to SIO provided along the conveyance path.
918.

Recording paper for the copying machine main body 100? l! The document feeding device 1, which has stopped due to an abnormal situation called i-coiling, is in the process of copying the fourth original image 71, and the document is stopped at the first support cylinder 5, The originals that have already been exposed and copied (fifth copy and 671st copy) pass through the original reversing means 8 and are stopped at the second support tube 6, and are then exposed! Should/i7 draft (1st
100th and 2nd ■) are in a state of being stopped by the document conveyor 117.

As shown in FIG. 7(4), the document supply device 1 detects a paper jam of recording paper, for example, when a paper jam is detected.
The processing circuit 179 in response to the output of 12 transports the document! IX: is restarted. That is, at the time of resuming this conveyance operation, the processing circuit 179
A plurality of detectors 82 to S6 provided along the transport path of
Based on the output of Ua3! When returning originals that have stopped midway through the i-path to the original storage unit 2, do they return them sequentially to the lower side of the originals stored in the original storage unit 2 along the normal original transport direction, or in the opposite direction? r! is transported to and stored in the document storage section 2! A decision is made as to whether to stack them sequentially on top of the X draft and return them.

In the case shown in FIG. 7(3), the original (5th and 6th pages) in the second support cylinder 6 has already been copied, and the original (3rd page) in the ML support cylinder 6 has already been copied. and page 4)
and the originals (first and second pages) in the original transport means 7.
Pages> are those that are in the middle of exposure and unexposed and have not yet been copied. Therefore, the document feeding device 1 operates as shown in FIG. , the first page, the second page, the third page, and the fourth purchased document are reversely conveyed and returned to the document storage section 2.

As shown in FIG. 7 (5), the above-mentioned original returning operation is performed, and the operator removes the recording paper #i of the copy base book 1 + 100, and the original is stored in the original document feeding device g. The storage state of the originals in unit 2 is such that the conveyance operation was interrupted due to the paper jam of the recording paper mentioned above, and the originals are fed in order from the original with the original image of the fourth page, which was not copied, to the 1rR taking position. The read exposure operation at 20 is now ready to start.

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. Furthermore, the operation time of the document supply device l required to rearrange the document storage state in the document storage section 2 so that such an interrupted copying operation can be resumed is within the transport path of the document supply device 1. Since the maximum number of documents that can be conveyed simultaneously is about 3 to 4, the process can be completed in a relatively short time. As a result, U (a state in which the copying operation can be resumed after a jam occurs
This will be much shorter than the opening hours for ＼ffl return.

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. In addition, when the document supply device 1 is stopped due to an abnormal situation such as a paper jam, the documents that are reversely conveyed and returned to the document storage section 2 are limited to documents whose copying has not been completed, such as during the exposure operation. There is no need to perform unnecessary processing such as empty feeding of the original between the restart and end of the copying operation, and the copying operation can be continued in the minimum necessary time. Furthermore, as mentioned above, in order to restart the copying operation when an abnormal situation occurs, the number of documents to be conveyed by the document supply device 1 is small, about 3 to 4, and therefore the high-speed emptying is required. There is no need to perform feeding, and damage to the original document during the return operation can be reduced.

FIG. 8 is a flowchart for explaining the above-mentioned operation. In step nl, when the document tray a is placed in the document storage section 2 of the document supplying device 1 and the start of copying is instructed by the operator's operation of the print switch 187, the process proceeds to step n2. A supply operation is started, and a copying operation is started in the copying machine main body 100.

In step 3, the presence or absence of an abnormal situation such as paper jam or consumption of recording paper in the copying machine main body 100, running out of toner in the developing device 103, failure of an electric circuit including a corona discharger, etc. is determined along the conveyance path. The decision is made based on the outputs of each of the multiple detectors.

If it is determined that no abnormal situation has occurred, proceed to step n.
4, and the copying operation continues. In step n5,
The end of the copying operation is determined based on the preset number of copies and the output of the detector Sl that detects one circulation of the original in the original supplying device I. If the end is not determined, 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 113 that an abnormal situation has occurred, the process proceeds to step (2) 6, where the driving of the copying machine main body 100 is stopped and the transport operation of the original T:4 feeding device 1 is temporarily stopped. In step n7, the direction of conveyance of the document stopped midway through the conveyance path of the document supply device 1 when returning it to the document storage section 2 is determined based on the outputs of the detectors 82 to S6 provided along the conveyance path. The originals that have been copied are returned in a sequential manner along the normal original transport force 1m1, and the originals that have not been copied are returned to the original storage unit 2 by being transported in the opposite direction to the normal transport direction. It will be done. As a result, the original document i that has stopped in the middle of the conveyance path and has not yet been copied is returned to the top of the original documents stacked in the m document storage section 2 in order.

As explained above, according to the present embodiment, when an abnormal situation occurs, the document supply bag N1 is used only for documents whose copying has not been completed among the originals that have stopped in the middle of the conveyance path due to the occurrence of the abnormal situation. The original is transported through the original transport path in the opposite direction to the normal transport direction and returned to the original storage unit 2, and the original after exposure and copying is returned to the original storage unit 2 in the normal transport direction. To shorten the time from interruption of a copying operation to a state in which it can be restarted, and the time from restarting to the end of a copying operation. At this time, the document to be copied next is stacked at the top in the document storage section 2, so the document that has already been copied is stacked at the top, so when copying resumes, the document may be fed in advance. It is possible to avoid such wasteful processing operations and the situation where duplicate copying is performed in connection with such processing operations, and the efficiency and rationalization of copying operations can be achieved.

Further, in the above embodiment, the abnormal situation occurs when the copying machine main body 100
Although the explanation has been given using the example of a paper jam in the recording paper, it is not limited to this, but if the recording paper is consumed, or if the developer such as toner is consumed in the developing device,
Alternatively, an abnormal situation occurs such as a failure of the electrical circuit including the corona discharger, or furthermore, a paper jam in the document feeder 1 that allows reverse feeding but not forward feeding. The present invention is also effective in such cases.

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 it is not limited to a transfer type copying machine, for example, a copying machine using recording paper whose surface is a photosensitive surface, etc. 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 is configured to control a copying machine during conveyance in response to the output of the abnormality detection means that detects an abnormality in the document feeding device, the recording paper feeding device, and the copying device. The operation of the document supply means is controlled so that the document whose copying has not yet been completed is conveyed through the document conveyance path in the opposite direction to the conveyance direction of the N document and returned to the supply end side.
The time from the interruption of the copying operation to the re-M and the time from the restarting of the copying operation to the end are shortened, and an efficient 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 shows a transfer device equipped with a document feeding device 1! l! FIG. 2 is a simplified sectional view showing the basic configuration of an electrostatic copying machine; 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 a perspective view showing an example of the copying operation. A schematic diagram, FIG. 7 is a schematic diagram showing an example of the operation according to the present invention,
FIG. 8 is a flowchart for explaining the operation of one embodiment, and FIG. 9 is a schematic diagram for explaining the operation 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 binding cassette, 109a-10
9d...Paper feed roller, 110...Ejection tray, 14
9... Exposure means, 175... Operation panel, 179.
...Processing circuit, 187...Print switch, D...
・M document, P...recording paper, St~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 document which is being transported and has not yet been copied is 1. A copying machine equipped with a document feeding device, comprising a control means for controlling a document feeding path so that the document is transported in a direction opposite to the direction in which the document is transported and returned to the feeding end side.