Automatic document feeder and image forming device provided with the same

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to an automatic document feeding device applicable to an image forming apparatus such as a copier and a facsimile, and an image forming apparatus provided with the same. The present invention relates to an automatic document feeding device and an image forming apparatus equipped with the automatic document feeding device.

【0002】

[Conventional technology]

Conventionally, the automatic document feeding device generally feeds in one direction, and the arrow indicating the paper feeding direction that lights up as the setting completion display when the document is set is only one direction or only the lighting display of the setting completion.

【0003】

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional example, when two or more feeding directions are required, the feeding direction cannot be switched to feed the original. Therefore, a document feeding device having two or more feeding directions has been developed. However, even in this case, since the document feeding device has only one arrow indicating the standard feeding direction, it is not easy to confirm the feeding direction. Therefore, it is difficult to know where the jam document is located in the device during jam recovery. In addition, it is difficult to understand the feeding direction of documents that must be fed in consideration of the feeding direction (for example, punched documents for files, curled documents, etc.). There were drawbacks such as jamming and lowering reliability.

【0004】

It should be noted that the above-mentioned problems are similarly provided in the image forming apparatus provided with the automatic document feeding device.

【0005】

Therefore, in the present invention, the arrow in the feeding direction at the time of setting the original is selectively lit so that the user can confirm the conveying direction of the sheet before the start of the copy job, and the efficient user's intention based on the state of the original. It is an object of the present invention to provide an automatic document feeding device capable of reliably performing the work according to the above and an image forming device equipped with the automatic document feeding device.

【0006】

[Means for solving problems]

The present invention has been made in view of the above circumstances, and includes a document mounting table on which a document is placed, a first transporting means for transporting a document on the document mounting table to a first transport path, and the document mounting. The size of the second transport means for transporting the originals on the table to the second transport path, the control means for controlling the first and second transport means, and the size of the document placed on the document mount in the transport direction. The first and second means are provided with a detection means for detecting and a display means for displaying the transfer of the document to the first and second transfer paths, and the control means is based on a signal from the detection means. The automatic document feeding device is characterized in that the transport route of the above is selected and the selected first and second transport means are controlled.

【0007】

Further, the document size recognition means for detecting the size in the direction orthogonal to the transport direction of the document placed on the document mounting table is provided, and the control means has the first and the first based on the signal recognized by the document size recognition means. It is preferable to select the second transport route.

【0008】

Further, the control means may control the display means so as to display the selected first and second transport paths.

【0009】

Then, a document mounting table on which the originals are placed, a first transporting means for transporting the documents on the document mounting table to the first transport path, and a second transporting means for transporting the documents on the document mounting table to the second transport path. 2. The transport means, the control means for controlling the first and second transport means, the switching means for switching the transport of the document to the first and second transport paths, and the first of the document. Original manuscript automatic characterized in that the control means includes a display means for displaying the transfer to the second transfer path, and the control means controls the first and second transfer means based on a command from the switching means. It may be a feeding device.

【0010】

Further, the display means may be controlled so that the control means displays the first and second transport paths based on the controlled first and second transport means.

【0011】

Then, a document mounting table on which the document can be placed, a document transporting means for separately supplying the document one by one, and further transporting the document to the reading unit, and feeding the document from the document mounting table. It is equipped with at least two feeding ports and a display means for displaying the feeding direction when the document is set in a predetermined position, and the feeding direction can be switched according to the conditions such as the setting mode and the document size, and the copy job. It may be an automatic document feeding device characterized in that the feeding direction can be recognized before the start.

【0012】

Further, a document presence / absence recognizing means for recognizing the presence / absence of a document and a document size recognizing means for recognizing the size of the document are provided, and the document feeding direction is determined from the information obtained by the recognition means, and the feeding direction is determined as described above. It is preferable to display it on the display means.

【0013】

Further, a document mounting table on which a document can be placed, a document transporting means for separately supplying the documents one by one and further transporting the document to the reading unit, and at least feeding the document from the document mounting table. Two feeding ports, a document presence / absence recognizing means for recognizing the presence / absence of a document, a document size recognizing means for recognizing the size of a document, and a display means for displaying the direction in which the document is fed on the document mounting table. It may be an automatic document feeding device characterized by the above.

【0014】

Further, it is preferable that the display means displays the direction by determining the feeding direction by the detecting means such as the document presence / absence recognizing means and the document size recognizing means.

【0015】

The present invention can be similarly applied to an image forming apparatus including an image forming unit and an automatic document feeding device for sending a document to the image forming unit.

【0016】

[Action] Based on the above configuration, when the detecting means detects the size of the document placed on the document placing table in the transport direction, the control means sets the first and second transport paths based on the signal from the detecting means. Select and control the first and second transport means for transporting the document to the selected first and second transport paths. Then, the manuscript is transported to the selected first and second transport routes, and the display means displays the selected first and second transport routes.

【0017】

Further, the document size recognition means for detecting the size of the document placed on the document mounting table in the direction orthogonal to the transport direction sends a recognition signal to the control means, and the control means first and foremost based on the signal. Select a second transport route.

【0018】

Further, when the switching means for switching the transfer of the document to the first and second transfer paths is switched, the control means transfers the document to the first and second transfer paths based on the signal from the switching means. Control the first and second transport means. Then, the document is transported to the switched first and second transport paths, and the display means displays the selected first and second transport paths.

【0019】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

【0020】

FIG. 2 shows an example of the main body (hereinafter referred to as copier device main body) of an image forming apparatus such as a copying machine and a facsimile to which the automatic document feeding device according to the present invention can be applied. The copying machine apparatus main body 900 includes a platen glass 3 as a document reading unit, a light source (reading means) 907, an optical (lens) system 908, a paper feeding unit 909, an image forming unit 902, and the like. Documents P are fed to the platen glass 3 one by one by the document automatic feeding device 2.

【0021】

The paper feed unit 909 has cassettes 910 and 911 that store the sheet material and can be attached to and detached from the copier main body 900, and deck 913 arranged on the pedestal 912. The image forming unit 902 is provided with a developing device 915 having a cylindrical photosensitive drum 914, a transfer charging device 916, a separation charging device 917, a cleaner 918, a primary charging device 919, and the like. A transport device 920, a fixing device 904, a discharge roller 905, and the like are arranged on the downstream side of the image forming unit 902. The discharged sheet material S is classified as necessary by the sheet sorting device 922 connected to the copying machine device main body 900. Reference numeral 930 indicates a control device (CPU) of the copying machine device main body 900.

【0022】

Next, the operation of the above-mentioned image forming apparatus will be described. When a paper feed signal is output from the control device 930, which is a control means for controlling the copying machine device, which is provided on the copying machine device main body side 900, the sheet material S is fed from the cassettes 910, 911 or the deck 913. On the other hand, the light reflected from the light source 907 applied to the document P placed on the platen glass 3 is applied to the photosensitive drum 914 via the optical (lens) system 908. The photosensitive drum 914 is precharged by the primary charger 919, and an electrostatic latent image is formed by irradiation with light, and then a toner image is formed by the developer 915.

【0023】

The sheet material S fed from the paper feed unit 909 is sent to the image forming unit 902 after the skew is corrected by the resist roller 901 and the timing is further adjusted. In the image forming unit 902, the toner image of the photosensitive drum 914 is transferred to the sheet material S sent by the transfer charger 916, and the transferred sheet material S has the opposite polarity to the transfer charger 916 by the separation charger 917. Is charged and separated from the photosensitive drum 914. Then, the separated sheet material S is conveyed to the fixing device 904 by the conveying device 920, and the unfixed transfer image is permanently fixed to the sheet material S by the fixing device 904. The sheet material S on which the image is fixed is discharged from the copying machine apparatus main body 900 by the discharge roller 905. In this way, an image is formed and discharged from the sheet material S fed from the paper feed unit 909.

【0024】

Next, the document automatic feeding device according to the present invention will be described.

【0025】

FIG. 1 shows a vertical sectional front view of the automatic document feeding device 2. In the figure, on the platen glass 3 of the copying machine apparatus main body 900, a forward / reverse reversible transport belt (endless belt) 20 wound around a drive roller 17 and a driven roller 19 is arranged. A plurality of original documents P are placed on the document placing table 5, and the width directions are regulated and aligned by a pair of width regulating plates 7. The recycle lever 10 placed on the document P is a member that distinguishes between the undelivered document P and the fed document P discharged onto the document mounting table 5 after feeding. Reference numeral 6 denotes a shutter (moving means) that receives and aligns the tip of the document P and retracts below the document mounting table 5 when feeding paper. Reference numeral 9 denotes a half-moon-shaped feeding roller, which rotates at the time of feeding and feeds the document P from the bottom of the document P.

【0026】

On the downstream side of the feed roller 9, a separation portion including a transport roller 11 which is a first transport means for transporting documents by rotating in the document feed direction and a separation belt 12 which rotates in the document return direction is arranged. Then, the documents P sent out by the feeding roller 9 are separated and conveyed one by one. Further downstream, resist rollers 13 and 15 consisting of a reversing roller (driving roller) 13 and a driven roller 15 in contact with the reversing roller 13 are arranged, and the original P is placed on the platen glass 3 at a predetermined timing. Feed the paper. The original image P, which is conveyed onto the platen glass 3 by the rotation of the conveying belt 20 and stopped at a predetermined position, is fixedly read by scanning the light source 907 in the direction of the arrow. The first transfer path 16 is composed of the transfer paths including the separation portions 11 and 12 and the resist roller pairs 13 and 15. Reference numeral 89 shown in the figure is a supply unit which is a first supply port. The first transport path 16, the transport belt 20, the discharge path 26, and the like constitute a switchback path TS in which the document P is transported to the reading position by switchback and discharged.

【0027】

After the fixed reading is completed, the document P is conveyed to the flapper 25 via the general feed path outside the reversing roller 13 due to the reversal of the general feed belt 20. When reading both sides of the original P, the flapper 25 inverts the original P and guides the original P to the platen glass 3, and in the case of one-sided reading, guides the original P to the ejection roller vs. 29 via the ejection path 26. Reference numeral 27 denotes a sensor that detects the document P passing through the discharge path 26. The document P ejected by the ejection roller pair 29 is placed on the unpapered document P on the document mounting table 5, and is partitioned and distinguished by the recycle lever 10.

【0028】

The document mounting table 5 can be rotated around the support shaft 4 to the tilted position in FIG. 1 and the horizontal position shown in FIG. 3 by the action described later. At the tilted position in FIG. 1, the document P Is transported to the platen glass 3 through the first transport path 16 as described above, and at the position of FIG. 3, from the rear end side (right side in FIG. 1) of the document P via the second transport path 45. It is designed to be transported to the platen glass 3. The second transport path 45, the transport belt 20, the discharge path 26, and the like constitute a closed path path TC in which the document P is transported to the reading position in a closed loop and discharged. Further, the switchback path TS, the transport belt 20, and the closed pass path TC constitute the document transport means TS, TC, 20 for transporting the document P to the reading position and discharging the document P. Reference numeral 77 denotes a supply unit which is a second supply port for supplying the document P fed by the feed roller 36 to the document transport means TS, TC, and 20.

【0029】

Members similar to the above-mentioned members are also arranged on the rear end side of the document mounting table 5, where 37 is a guide plate, 36 is a half-moon-shaped feeding roller, and 39 is pressing the document P against the feeding roller 36. The weights 40 indicate a transport roller which is a second transport means for transporting the document by rotating in the document feeding direction, and 41 indicates a separation belt rotating in the returning direction of the document P. On the downstream side (right side in FIG. 3) of the separation portion on the CP side (closed path side) including the transfer roller 40 and the separation belt 41, the separated document P is conveyed to the platen glass 3 as the reading position. The transport path 45 of 2 is provided. A transport roller pair 43, a resist sensor 48, a resist roller pair 46, and a feed roller pair 47 are arranged in the second transport path 45, respectively.

【0030】

Between the upper roller of the feeding roller vs. 47 and the second roller 19 of the transport belt 20, there is a moving guide member 50 that guides the document P to the platen glass 3 or guides the document P on the platen glass 3. It is arranged. 51 indicates a manual feed tray for manually feeding the document P into the automatic document feeder 2, 52 indicates a manual paper feed roller, and 53 and 49 indicate a guide plate for the manual document.

【0031】

In FIG. 1, when scanning the document P, the light source 907A, which is a scanning means, is moved to a predetermined position. At the upper position of the light source 907A, both side ends of the transport belt 20 in the width direction are pressed against the platen glass 3 by a pair of pressing members 110. As a result, even if the side end portion of the transport belt 20 has a wavy shape due to the change with time due to the use of the transport belt 20, reading defects due to the floating of the side end portion of the document P can be prevented.

【0032】

FIG. 4 shows the operation panel 120 related to the copier device main body 900 and the document automatic feeding device 2. 125 indicates the start button, and 121 indicates the stop key for stopping the paper feeding of the original P. Reference numeral 122 denotes a scanning adjustment key, which is a switching means for switching whether to feed the original document to the TS or the TC.

【0033】

FIG. 5 shows the drive system of the automatic document feeder. Reference numeral 95 denotes a recycling motor that drives a recycling lever 10 that separates the original (sheet material) P that has been fed and the original P that has made a round, 101 is a weight SL that raises and lowers the pressing member 39A, 92 is a separation motor, and the transfer roller 11 Drive, 40. The separation motor 92 may be individually provided for each of the transport roller 11 which is the first transport means and the transport roller 40 which is the second transport means. 92b is the separation motor encoder, 103 is the clutch that transmits the rotation of the separation motor 92 to the separation parts 40 and 41, 91 is the belt motor that drives the conveyor belt 20, 9lb is the separation motor encoder, and 93 is the reversal that drives the reversing roller 13. Motor, 93b is a reversing motor encoder, 98a is a driven roller encoder with a registration roller pair of 13,15, 99 is a paper ejection motor, 99b is a paper ejection motor encoder that drives an ejection roller pair 29, 66 is a bundle transport that moves the shutter 6. Motor, 102 is a tray elevating motor that moves the document mounting table 5 up and down, 105 is a partition member SL that moves the partition member 39B of the weight 39 up and down, 106 is the weight SL that moves the pressing member 39A of the weight 39 up and down, 107b is the transport Roller-to-encoder, 109 indicates a CP resist motor 109, 109b, which drives a resist roller-to-46, indicates a CP resist motor encoder.

【0034】

FIG. 6 shows a block diagram related to the control of the automatic document feeding device 2. Each sensor and other members arranged at the main part of the automatic document feeding device 2 shown in FIG. 1 are connected to the control device (CPU) 100 of the automatic document feeding device 2. In FIG. 1, 71 is an empty sensor that detects the presence or absence of a document P on the document mounting table 5, 72 is a separation sensor, 73 is a pre-resist sensor that detects a registered document P, 74 is a post-resist sensor, and 75 is an inversion. An inversion sensor that detects the document P passing through the roller 13, 42 is a separation sensor on the CP side, 48 is a resist sensor, and 79 is a paper feed sensor.

【0035】

The drive mechanism of the width control plate 7 will be described with reference to FIG. A pair of width control plates 7 are mounted on both sides of the document mounting table 5 so as to be movable in the width direction (arrows 86, 87). A document size recognition means 80 composed of a rotary volume is provided at the center of the document mounting table 5, and a pinion 81 is fixed to the output shaft 80a of the rotary volume 80.

【0036】

At the opposite position of the pinion 81, a pair of racks 82 are engaged and their bases are fixed to each width control plate 7. As a result, when the width regulating plate 7 is manually moved so as to bring the width regulating plates 7 into contact with both sides of the placed document P, the rotary volume 80 rotates according to the width size of the document P. As a result, the size of the original P is automatically detected. Note that FIG. 9 shows the relationship between the document size of the document P placed on the document mounting table 5 and the rotation angle of the rotary volume 80, and the rotation amount of the rotary volume 80 causes the document mounting table 5 to be mounted. The size of the placed document P is detected.

【0037】

Further, a side jog solenoid (Y jog) 112 is internally provided on one of the width control plates 7, and one end of a pair of links 115 is pivotally attached to the connecting lever 113 connected to the side jog solenoid (Y jog) 112. ing. The other end of the link 115 is pivotally attached to the jog member 117, respectively. As a result, when the side jog solenoid 112 is turned on / off, the jog member 117 reciprocates in the width direction of the document mounting table 5 to align the mounted document P in the width direction.

【0038】

Next, the most characteristic points of the present invention will be described. When the user sets the document P on the document mounting table 5, the document set sensor 71 detects the presence or absence of the document. The width of the document is detected by the rotary volume 80 as described above. Regarding the length of the document, it is detected whether or not the document P or an auxiliary tray (not shown here) exists on the document rear end sensor 76. The document size is identified by the combination of the rotary volume 80 and the document rear edge sensor (detecting means) 76. For example, if the width detected by the rotary volume 80 is A4 and the document rear end sensor 76 is blocked, the size of the document P is determined to be A3, and if it is not blocked, the size of the document P is determined to be A4. Depending on the size identified in this way, the small size such as A4 is limited to the closed drum path, and the large size such as A3 is limited to the switchback path. As described above, the feeding direction of the document P is determined from the information obtained by the detecting means, and the arrow of the feeding direction is lit on the feeding direction display plate (display means) 200 shown in FIG. 11 (FIG. 1).

【0039】

Next, another embodiment of the feeding direction display plate is shown in FIG. In the present embodiment, the feeding direction display plate 200'is indicated by an arrow having a shape that more realistically expresses the direction in which the document is conveyed.

【0040】

FIG. 11 shows the state of the LED in the paper feed direction display plate 200.

【0041】

FIG. 12 shows an example of document retention during jamming on the switchback path, and FIG. 13 shows an example of document retention during jamming on the closed path. By displaying the feeding direction in this way, for example, as shown in FIGS. 12 and 13, it is possible to easily recognize which path the original P may be retained at the time of jamming. it can.

【0042】

Next, based on FIG. 7, the operation when the document P is scanned in the scanning mode will be described.

【0043】

First, the scanning mode is switched by the scanning adjustment key 122 of the operation panel 120 shown in FIG. By the switching, the feeding direction of the original is displayed on the feeding direction display plate 200. The user (operator) confirms the feeding direction displayed on the feeding direction display plate 200, and places the document P on the document loading table 5. At this time, if the manuscript has holes or the manuscript has curls, the manuscript P is placed on the manuscript mounting table 5 with the holes or curled ends aligned on the opposite side of the feeding direction. .. When the document P is placed on the document mounting table 5 without operating the scanning adjustment key 122, the document rear end sensor 76 and the document transport direction, which are detection means for detecting the size of the document in the transport direction, are used. The control device 930, which is a control means, recognizes the document size by the detection signal from the rotary volume 80, which is the document size recognition means for detecting the size in the direction (width direction) orthogonal to the document size, selects the feed direction, and feeds the document. The feeding direction is displayed on the feeding direction display plate 200. Then, the user (operator) confirms the feeding direction displayed on the feeding direction display plate 200, and places the document P on the document loading table 5. In this case as well, if the original has holes or the original has curls, align the edges with the holes or curls on the opposite side of the feeding direction and place the original P on the original mounting table. Place on 5.

【0044】

Next, a tray-down process is performed to move the document mounting table 5 to the lower limit position (draftseq1), a document bundle transfer process is performed to move the document bundle P to the right (draftseq2), and then the document bundle P is subjected to a tray-down process. After performing bundle transport direction jog (X jog), width direction jog (Y jog) is performed in sequence (draftseq3), and then clockwise separation processing is performed to separate only one document at the bottom (draftSeq4).

【0045】

After that, a clockwise paper feed process (draftseq5) is performed so that the original is placed slightly upstream from the position where the image is started to be read (scanning destination) by the scanning method, and the original exchange (scanning start) trigger from the main body 900 is triggered. When it is received, the original scanning process is performed (draftseq6) in order to read the image while the optical system 133 of the main body 100 is fixed at the predetermined position, and the original is fixed and the original image is started to be read at the predetermined speed (draftseq6). Move to (fixed image destination). After that, the original is ejected onto the original tray 2 by performing the clockwise ejection process (draftseq7).

【0046】

When the scanning of the image of the manuscript is started, the sheet material S is fed from the cassette 910, 911 or the deck 913 (Fig. 2). On the other hand, the light reflected from the light source 907 applied to the document P placed on the platen glass 3 is applied to the photosensitive drum 914 via the optical (lens) system 908. The photosensitive drum 914 is precharged by the primary charger 919, and an electrostatic latent image is formed by irradiation with light, and then a toner image is formed by the developer 915. The sheet material S fed from the paper feed unit 909 is sent to the image forming unit 902 after the skew is corrected by the resist roller 901 and the timing is further adjusted. In the image forming unit 902, the toner image of the photosensitive drum 914 is transferred to the sheet material S sent by the transfer charger 916, and the transferred sheet material S has the opposite polarity to the transfer charger 916 by the separation charger 917. Is charged and separated from the photosensitive drum 914. Then, the separated sheet material S is conveyed to the fixing device 904 by the conveying device 920, and the unfixed transfer image is permanently fixed to the sheet material S by the fixing device 904. The sheet material S on which the image is fixed is discharged from the copying machine apparatus main body 900 by the discharge roller 905. In this way, an image is formed and discharged from the sheet material S fed from the paper feed unit 909.

【0047】

On the other hand, if the final document judgment during the clockwise separation process (draftSeq4) described later is a negative judgment, the right side separation process for the next document is started during the right paper feed process (draftSeq5) of the next step to continue. Allows document feeding. At this stage, when the original P causes a jam, the user recognizes the position of the jam generated by confirming the feeding direction of the original P displayed on the feeding direction display plate 200, and recognizes the position of the jam. After removing the original P that caused the jam and recovering it, pressing the start button 125 continues to form an image.

【0048】

Further, after the clockwise ejection process (draftSeq7) is completed, if it is the final document, the tray-up process (draftSeq8) is performed to return the document tray 2 to the initial position. Further, when a plurality of images are formed after the document scanning process (draftSeq6) is completed, the main body 100 returns the light source 907 to the home position on the fixed image destination side, and then moves the light source 907 a desired number of times. It is possible to perform fixed reading by.

【0049】

On the other hand, in the case of a perforated document, if it is fed from the direction of the hole, it may cause a false detection of the sensor, or the side with the hole may be curled or bent easily. Easy to become. Further, in a document having a curled tip, the tip of the document is caught by the separation belt 12 which is opposite to the document feeding direction described above, and the document cannot be fed or is likely to be jammed. By preventing the user from jamming due to feeding from the perforated side or curl side, the feeding direction can be recognized before the copy job, so that the original can be reset and further, the processing at the time of jam The automatic document feeding device according to the present invention and the image forming device provided with the automatic document feeding device according to the present invention are effective.

【0050】

[Effect of the invention]

As described above, depending on the automatic document feeding device of the present invention and the image forming apparatus provided with the automatic document feeding device, even when feeding a perforated document, a curled document, or the like, the user can use the display means to determine the document feeding direction. By being able to recognize in advance, the document is fed by changing the setting direction of the defective end of the document before the start of the copy job, so that it is possible to prevent feeding defects such as jams and improve workability.

【0051】

In addition, since the direction in which the document flows can be easily recognized during jam processing, the position of the jam that has occurred can be easily searched, the work time for jam recovery can be shortened, and the page ordering during jam recovery can be easily performed. , It is effective for improving the work efficiency of the user.

[Simple explanation of drawings]

[Figure 1]

The vertical sectional front view of the document automatic feeding apparatus which concerns on this invention.

[Figure 2]

The vertical sectional front view which shows an example of the image forming apparatus to which an automatic document feeding apparatus can apply.

[Fig. 3]

A vertical sectional front view showing a state in which a long document is fed in an automatic document feeding device.

[Fig. 4]

Top view of the operation panel.

[Fig. 5]

The vertical sectional front view which shows the structure of the drive system of the document automatic feeding apparatus.

[Fig. 6]

The block diagram relating to the control of the document automatic feeding apparatus.

[Fig. 7]

Flowchart of scan mode.

[Fig. 8]

Top view of the width control plate and its drive unit.

[Fig. 9]

Correlation diagram between document size and rotary volume.

[Fig. 10]

The front view which shows the other embodiment of the paper feed direction display plate.

[Fig. 11]

A perspective view showing the state of the LED in the display plate.

[Fig. 12]

Explanatory drawing which shows the example of document retention in a switchback path.

[Fig. 13]

Explanatory drawing which shows the example of document retention in a closed path.

[Explanation of symbols]

P manuscript S sheet material TS switchback path TC closed path route TS, TC, 20 Document transport means 2 Automatic document feeder 3 Reader (platen glass) 5 Manuscript stand 6 Shutter (means of transportation) 7 Width control plate 9 Sending roller on the switchback side 10 Recycle lever 11 First transport means (convey roller) 12 Separation belt 11,12 Separation part 13 Reversing roller (driving roller paired with resist roller) 15 Resist roller pair driven roller 16 First transport route 20 Conveyance belt (endless belt) 35 Drive member (elevating means) 36 CP side feed roller 39 weight 39A Pressing member 39B Partition member 40 Second transport means (convey roller) 41 Separation belt 40,41 CP side separator 45 Second transport route 47 Feeding Roller vs. 48 resist sensor 71 Manuscript presence / absence recognition means 76 Detection means (rear edge sensor of document) 77 Second supply port (supply unit) 80 Original size recognition means (rotary volume) 89 First air supply port (supply unit) 100 Control device (CPU) of automatic document feeder 112 Side Jog Solenoid (Side Jog Means) 122 Switching means (scanning adjustment key) 200 Display means (feeding direction display plate) 900 Image forming device (copier device body) 902 Image forming part 930 Control means (control device of image forming device)