JP2006245948A - Original transporting apparatus and image forming apparatus provided with same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an original transporting that increases the number of originals consecutively transported the originals on an original placing tray at once and can stably transport the originals. <P>SOLUTION: A projected demarcating means 22 is provided on the original placing tray 21 of the original transporting apparatus 20 to demarcate the tray 21 into a supply part 21a and a standby part 21b. Originals are placed on the supply part 21a and the standby part 21b, and when all the originals placed on the supply part 21a are transported by an original transporting part 24, the demarcating means 22 is contained downwardly from the upper face of the original placing tray 21, and a standby original moving means 23 moves the originals placed on the standby part 21b to the supply part 21a. Thereafter the demarcating means 22 is projected onto the original placing tray 21, and the originals moved to the supply part 21a are succeedingly transported by the original transporting part 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a document conveying device that sends a document placed on a document placing tray toward a document reading unit, and an image forming apparatus such as a copying machine and a facsimile equipped with the document feeding device.

  In a device having a function of reading an image of a document such as a copying machine or a scanner device, for example, a plurality of documents placed on a document placement tray as in an automatic sheet document feeding device proposed in Patent Document 1 is used. A device having a document conveying device that automatically conveys is generally used.

In the automatic sheet feeding apparatus of Patent Document 1, the document placed on the document stacking tray (document placing tray) is fed in the direction of the separating means by the half-moon roller and the weight, and is separated one by one, and the image is separated. After being read, it is discharged to the document discharge tray.
JP-A-5-323726 (page 2, page 3, FIG. 1)

  However, in the automatic sheet document feeder proposed in Patent Document 1, the number of documents that can be placed is limited by the interval between the weight and the half-moon roller, and when the amount of documents is large, it is divided into several times. I had to read it. Increasing the distance between the weight and the half-moon roller can increase the number of documents that can be placed, but the pressure applied to the document decreases, so the leading edge of the document is not properly handled and the number of sheets that cannot be separated one by one by the separating means The document is conveyed in the direction of the feed roller at a time, which causes the document to be jammed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an original conveying apparatus that can convey a large amount of originals continuously and stably.

  (1) In order to achieve the above object, the present invention provides a document transporting device that feeds a document placed on a document placing tray toward a document reading unit, and protrudes from an upper surface of the document placing tray. A sorting unit that divides the setting tray into a supply unit on the downstream side in the document conveying direction and a standby unit on the upstream side, and an upstream side in the document conveying direction of the document that protrudes from the upper surface of the document setting tray and is placed on the waiting unit Standby document moving means for moving the document to the supply unit by pushing the end of the document, and after feeding all the documents placed on the supply unit, the sorting member is placed below the upper surface of the document placement tray. The document is stored, and the document placed on the standby unit is moved to the supply unit by the standby document moving unit.

  (2) Further, in the document transport device having the above-described configuration, the present invention is provided with a plurality of standby units arranged in the document transport direction on the upstream side of the supply unit of the document stacking tray in the document transport direction. Standby document moving means, and after all the documents placed on the supply section have been sent out, the sorting member is stored below the upper surface of the document placing tray, and the standby document moving means The original placed on the corresponding standby unit is moved to the supply unit or the standby unit on the downstream side in the adjacent document transport direction, and then the standby document moving means is below the upper surface of the original tray. It is characterized by returning to the original position via.

  (3) According to the present invention, in the document conveying device having the above-described configuration, the standby document moving means protruding from the upper surface of the document placing tray moves the document and then moves from the upper surface of the document placing tray. Is also stored in the lower position, and subsequently moved downward to the original position before the original is moved, and then returns to the original position by projecting to the upper surface of the original placement tray.

  (4) According to the present invention, in the document conveying device having the above-described configuration, at least the sorting member of the sorting member and the standby document moving means can be stored or protruded by operating a control button. Features.

  (5) Further, the present invention provides an image forming apparatus including the document transport device having the above-described configuration and a sheet discharge tray on which a sheet on which an image is formed is stacked. Each time the original is moved, the position of the paper discharged to the paper discharge tray is shifted to the left and right with respect to the paper transport direction.

  (6) Further, according to the present invention, in the image forming apparatus having the above-described configuration, the sheet discharge roller that discharges the sheet to the sheet discharge tray is discharged to the sheet discharge tray by moving left and right with respect to the sheet conveyance direction. The position of the sheet to be shifted is shifted left and right with respect to the sheet transport direction.

  (1) According to the present invention, the document is placed on the supply unit and the standby unit of the document placement tray, and the document on the standby unit is automatically moved to the supply unit, whereby the document is placed on the supply unit and the standby unit. These originals can be continuously conveyed while keeping the number of originals to be stably conveyed. That is, it is possible to place a document twice as many as the normal number at a time and convey it continuously and stably. In addition, each time the document in the standby unit moves to the supply unit, a large amount of documents can be continuously conveyed by placing the document on the standby unit that is empty.

  (2) Further, according to the present invention, a plurality of standby units are provided on the document placing tray, and the document placed on each standby unit can be moved to the supply unit or the adjacent standby unit. The number of documents corresponding to the number of documents can be placed on the document placing tray at a time and conveyed continuously.

  (3) According to the present invention, the standby document moving means that has moved the document moves below the upper surface of the document placing tray, moves below the original position, protrudes to the document placing tray, and returns to the original position. By returning to the position, the standby document moving means can surely return to the original position without hitting the moved document, so that the documents placed on the standby unit are successively moved downstream in the document transport direction. Can be repeated.

  (4) According to the present invention, at least the sorting member of the sorting member and the standby document moving means can be stored or protruded by the operation of the control button. When the document moving means is stored, a large-size document can be placed regardless of the size of the supply unit or the standby unit. When the document movement unit is projected, a large amount of the size corresponding to the supply unit and the standby unit can be placed. Documents can be placed and continuously conveyed.

  (5) Further, according to the present invention, every time the standby document moving means moves the document from the standby unit to the supply unit, the position where the sheet on which the image is formed is discharged to the sheet discharge tray is set in the sheet transport direction. On the other hand, since the sheets are shifted to the left and right, the sheet on which the image is formed can be easily distinguished for each document placed on a separate supply unit or standby unit.

  (6) According to the present invention, each time the standby document moving unit moves the document from the standby unit to the supply unit, the sheet discharge roller that discharges the sheet to the sheet discharge tray is Therefore, it is not necessary to provide a moving device such as a paper post-processing device for separately shifting the original to the left or right.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of a copying machine as an example of an image forming apparatus according to the first embodiment, FIG. 2 is a plan view of a document conveying device according to the first embodiment, and FIG. 3 is a diagram of the first embodiment. It is a schematic block diagram of the document mounting tray which concerns on another embodiment.

  First, the configuration and operation of each part of the copying machine 10 will be described. The copying machine 10 includes a main body 11 and a document conveying device 20 placed above the main body 11. A control device 13 for controlling the entire operation of the copying machine 10 such as an image forming operation, an image reading operation, and a document conveying operation is provided on the upper portion of the main body 11. A discharge tray 84 is provided at the center of the main body 11.

  The document conveying device 20 is attached to the main body 11 so that it can be opened and closed with the back side of the sheet of FIG. The document transport device 20 includes a document placement tray 21, a document transport unit 24, a document discharge tray 27, and a document cover 28. The document discharge tray 27 is integrally formed as a part of the upper surface of the document cover 28. The document placing tray 21 is provided at the upstream end of the document conveying path 25, and the document discharge tray 27 is provided at the downstream end of the document conveying path 25.

  The document transport unit 24 includes a document detection sensor 24a that detects the presence or absence of a document, a forward feed roller 24b, a paper feed roller 24c, a separation roller 24d, and a transport roller 24e in order from the upstream side in the document transport direction along the document transport path 25. A conveying roller 24f, a reading guide 24g, a conveying roller 24h, and a discharge roller pair 24i are provided. Further, the document reading unit 12 a that reads the document conveyed by the document conveying device 20 is set at a position facing the reading guide 24 g on the upper surface of the transparent glass platen 12 on the upper surface of the main body 11.

  The forward feed roller 24b is provided so as to be moved up and down by a driving means such as a solenoid (not shown). When the document detection sensor 24a does not detect a document, it moves upward so that the document is placed on the document tray 21. Make it easier to accept documents when placing them. Further, when the document detection sensor 24 a detects a document, the document detection sensor 24 a moves downward to apply pressure to the document C placed on the document placement tray 21 so that it can be transported to the document transport path 25.

  Both the feed roller 24c and the separation roller 24d are given a driving force that rotates in the clockwise direction in FIG. A torque limiter is attached to the separation roller 24d. When only one document C is transported by the forward feed roller 24b, the feeding roller 24c cannot resist the force of transporting the document C, and the separation roller 24d The document C is conveyed by rotating clockwise. On the other hand, when the document C is transported by a plurality of forward feed rollers 24b, the uppermost document C is transported by the paper feed roller 24c, while the document C below it is transported by the separation roller 24d. It is returned in the 21 direction.

  When a document is transported by the document transport device 20, when a user presses a copy start button provided on an operation panel (not shown), the document C placed on the document placement tray 21 is transferred to each roller of the document transport unit 24. The roller is transported along the document transport path 25, and an image attached to the document is read by a reading device 30 (to be described later) by the document reading unit 12a.

  Further, when placing the document on the platen 12, place the document on the placed document reading unit 12 b set on the upper surface of the platen 12 with the surface on which the image to be formed on the sheet is placed on the platen 12 side. Then, the document cover 28 is closed. When the user presses the copy start button, an image attached to the surface in contact with the platen 12 of the document (not shown) pressed by the document cover 28 is read by the reading device 30.

  The reading device 30 is disposed on the upper portion of the main body 11, and includes an exposure lamp 31 and a reflecting plate 32, a first mirror 33, a second mirror 34, a third mirror 35, a condenser lens 36, an image sensor (for example, Line-type CCD) 37 is provided. The exposure lamp 31 and the first mirror 33 are mounted on a carriage 38, and the carriage 38 is provided so as to be horizontally movable in FIG.

  When reading an image of the document C conveyed by the document conveying device 20, the carriage 38 moves directly below the document reading unit 12a, and exposes the document C to which the irradiation light from the exposure lamp 31 is conveyed. The irradiation light is reduced and imaged on the image sensor 37 through the first mirror 33, the second mirror 34, the third mirror 35, and the condenser lens 36, and is read out as an electric signal through a photoelectric conversion process. This electrical signal is sent to the control device 13.

  On the other hand, when reading an image of a document placed on the platen 12, the exposure lamp 31 and the first mirror 33 on the carriage 38 move in the right direction in FIG. 1 below the placed document reading unit 12b. The original on the platen 12 is read and scanned. Thereby, the irradiation light is reduced and imaged on the image sensor 37, and is read to be an electric signal through a photoelectric conversion process as in the case of the sheet-through method, and this electric signal is sent to the control device 13.

  Below the main body 11, a paper feeding device 50, an image forming unit 60, and a fixing device 70 are provided. First, the sheet feeder 50 will be described. A paper feed cassette 51 that accommodates paper P is disposed at the lowermost portion of the main body 11, and the paper P is fed from the paper feed roller 52 to the transport path 55 one by one from here, and the transport roller pair 53 and the registration roller pair 54. Is conveyed to the image forming unit 60.

  Next, the image forming unit 60 will be described. The image forming unit 60 includes a photosensitive drum 61 and a charger 62, an optical scanning unit 63, a developing device 64, a transfer roller 65, and a cleaning device 66 disposed around the photosensitive drum 61. The photosensitive drum 61 rotates clockwise in FIG. 1, and the surface thereof is first uniformly charged by the charger 62. Next, the surface of the photosensitive drum 61 is irradiated with laser light from the optical scanning unit 63 based on the electrical signal of the image read by the reading device 30 and sent to the control device 13. The charge corresponding to the portion or the portion other than the image is erased, and an electrostatic latent image is formed. Then, toner is supplied to the electrostatic latent image by the developing device 64, and the electrostatic latent image is visualized as a toner image.

  When the photosensitive drum 61 further rotates and the toner image comes to a position facing the transfer roller 65, the sheet P is conveyed between the photosensitive drum 61 and the transfer roller 65 by the registration roller pair 54 accordingly. It will be. At this time, the toner image on the surface of the photosensitive drum 61 is transferred onto the paper P by applying a voltage having a polarity opposite to the charging polarity of the toner to the transfer roller 65. The toner remaining on the surface of the photosensitive drum 61 without being transferred to the paper P is removed by the cleaning device 66.

  On the other hand, the paper P onto which the toner image has been transferred is conveyed to a fixing device 70 comprising a heating roller 71 and a pressure roller 72, where the toner image is heated and pressurized and fixed on the paper P. Thereafter, the paper P is discharged to the paper discharge tray 84 by the discharge roller pair 83.

  In the first embodiment, as shown in FIGS. 1 and 2, the document placing tray 21 includes a supply unit 21 a on the downstream side in the document conveying direction and an upstream side by the sorting means 22 protruding on the document placing tray 21. The standby unit 21b is capable of placing a document on each of the supply unit 21a and the standby unit 21b. The number of documents that can be placed is limited by the distance between the upper surface of the document placement tray 21 and the peripheral surface of the forward feed roller 24b. The sorting unit 22 can be stored in the document placing tray 21 by a driving unit such as a solenoid (not shown). Further, standby document moving means 23 is provided on the upstream side of the standby unit 21b in the document conveyance direction. The waiting document moving means 23 is provided with a nut on the lower side, and a rod-like bolt 26 passed through the nut and a motor (not shown) for rotating the bolt toward the downstream or upstream side in the document conveying direction. It is provided so as to be movable along a groove 29 provided on the upper surface of the document placing tray 21. The standby unit 21b is provided with a document detection sensor 21c that detects the presence or absence of a document on the standby unit 21b.

  When a document is placed on the supply unit 21a and the standby unit 21b and a copy start button (not shown) is pressed, the document is conveyed by the document conveyance unit 24 from the supply unit 21a. When all the documents placed on the supply unit 21 a are sent to the document transport path 25, the sorting unit 22 is stored in the tray 21. Subsequently, the standby document moving means 23 moves the document placed on the standby unit 21b to the supply unit 21a by pushing the upstream end in the document transport direction. Thereafter, the sorting means 22 is protruded while the standby document moving means 23 is returned to the original position, and the original moved to the supply section 21 a is conveyed by the document conveying section 24.

  When there is no document in the standby unit 21b, the document detection sensor 21c does not detect the document, so that the document conveying device 20 stops its operation assuming that there is no document on the document placing tray 21.

  In addition, after the original is moved from the standby unit 21b to the supply unit 21a, the user may place the original on the standby unit 21b where there is no original. At this time, when all the documents are sent from the supply unit 21a to the document transport path 25, the sorting unit 22 and the standby document moving unit 23 operate to move the document from the standby unit 21b to the supply unit 21a. Thus, the document can be conveyed.

  In addition, when a document is not placed on the supply unit 21a but is placed only on the standby unit 21b and the copy start button is pressed, the document detection sensor 24a does not detect the document and the document detection sensor 21c does not detect the document. In response, the standby document moving means 23 moves the document from the standby unit 21b to the supply unit 21a. Subsequently, the document is conveyed by the document conveying unit 24 when the document detection sensor 24a detects the document. When all the originals are conveyed and all of the original detection sensors 24a, 21b and 21c do not detect the originals, the original conveying apparatus 20 stops its operation.

  The document transport device 20 is configured in this way, although the number of documents that can be placed on the document placement tray 21 is limited by the distance between the upper surface of the document placement tray 21 and the peripheral surface of the forward feed roller 24b. Accordingly, it is possible to place two times as many originals as the limited number at a time, and these originals can be continuously conveyed by the original conveying unit 24. In addition, although the user needs to place a document on the empty standby unit, a large amount of documents can be continuously conveyed.

  In the first embodiment, the discharge roller 83 is provided with a driving means (not shown) such as a solenoid so that it can be moved to the left and right with respect to the paper conveyance direction, and the original is moved from the standby unit 21b to the supply unit 21a. Each time the sheet P is discharged, the position at which the sheet P is discharged to the sheet discharge tray 84 may be shifted in the left or right direction with respect to the sheet conveyance direction. In this way, it is possible to easily distinguish between the paper on which the original image placed on the supply unit 21a and the standby unit 21b is formed. Further, in this case, whether or not to shift the discharge position of the paper P can be selected on the operation panel so that the paper P can be discharged as a series of bundles when the series of originals are separately placed on the document placement tray 21. It may be.

  In the first embodiment, a control button (not shown) may be provided on the operation panel of the main body 11 so that the user can project or store the sorting means 22 by the control button. When the sorting unit 22 is protruded, a large amount of documents can be continuously conveyed by causing the sorting unit 22 and the standby document moving unit 23 to perform the operations described above. Further, when the sorting means 22 is stored, a large-size document can be placed.

  In the first embodiment, as shown in FIG. 3, instead of the bolt 26, the standby document moving means 23 is attached to the endless belt 26a that is rotated by a motor (not shown), and the standby document moving means 23 is moved. You may do it.

  Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a schematic configuration diagram of a copying machine as an example of an image forming apparatus according to the second embodiment, and FIG. 5 is a plan view of the document conveying apparatus according to the second embodiment. The second embodiment is the same as the first embodiment except that the document placing tray 21 is different, and substantially the same parts are denoted by the same reference numerals.

  In the second embodiment, as shown in FIGS. 4 and 5, the document placing tray 21 includes a supply unit 21a on the downstream side in the document conveyance direction and two standby units 21b arranged on the upstream side in the document conveyance direction. , 21d, and the supply unit 21a and the standby unit 21b are separated by the sorting unit 22. The standby unit 21b and the standby unit 21d are respectively provided with document detection sensors 21c and 21e and standby document moving means 23a and 23b on the upstream side in the document transport direction. The standby unit 21b and the standby unit 21d are separated by a standby document moving unit 23a, and a document can be placed on the supply unit 21a and the standby units 21b and 21d, respectively. The standby document moving means 23a is attached to the endless belt 26a, and the standby document moving means 23b is attached to the endless belt 26b, and moves together with the rotating endless belts 26a and 26b.

  When a document is placed on each of the supply unit 21a and the standby units 21b and 21d and a copy start button (not shown) is pressed, the document C placed on the supply unit 21a is moved by the document conveyance unit 24 to the document conveyance path 25. Sent out. When all the documents C are sent from the supply unit 21a to the document transport path 25, the document detection sensors 21c and 21e detect the document C, but the document detection sensor 24a does not detect the document. In response to this, the sorting means 22 is housed inside, and standby document moving means 23a and 23b provided in the standby portions 21b and 21d are provided on the upper surface of the loading tray 21 by rotation of the endless belts 26a and 26b, respectively. The document C moves downstream along the groove 29 in the document conveyance direction, and the document C placed on the standby units 21b and 21d is moved to the adjacent supply unit 21a and standby unit 21b, respectively. As the endless belts 26a and 26b continue to rotate next, the standby document moving means 23a comes from the hole 29a provided on the upper surface of the document placing tray 21, and the standby document moving means 23b comes from the hole 29b to the document placing tray. 21 moves to the inside. Further, when the endless belts 26a and 26b rotate in the same direction, the standby document moving means 23a and 23b move upstream in the document conveying direction, the standby document moving means 23a from the hole 29b, and the standby document moving means 23b from the hole 29c. It protrudes onto the loading tray 21 and returns to the original position, and the endless belts 26a and 26b are stopped. Thus, the standby document moving means 23 can return to the original position without touching the document moved to the standby unit 21b.

  Subsequently, when all the documents C moved from the standby unit 21b to the supply unit 21a are also sent to the document conveyance path 25 by the document conveyance unit 24, only the document detection sensor 21c among the three document detection sensors detects the document C. It will be in the state. In response to this, the sorting unit 22 and the standby document moving unit 23a perform the above-described operation, and the document moved from the standby unit 21d to the standby unit 21b is moved to the supply unit 21a and is transported by the document transport unit 24. Thereafter, when all the originals C are sent out to the original transport path 25, the original detection sensors 24a, 21c and 21e will not detect the originals. Therefore, it is assumed that there is no original on the original placement tray 21, and the original transport apparatus 20 operates. To stop.

  In addition, after the original is moved from the standby unit 21b to the supply unit 21a, the user may place the original on the standby unit 21b and / or 21d in which the original has run out. At this time, every time all the originals are sent from the supply unit 21a to the original conveyance path 25, the sorting means 22 and the standby original moving means 23a and / or 23b are similar based on the detection results of the original detection sensors 24a, 21c and 21e. By operating, the original placed on the standby unit 21b and / or 21d is moved, and the original conveying device 20 continuously conveys the original.

  In addition, when a document is not placed on the supply unit 21a and a copy is placed on the standby unit 21b and / or the standby unit 21d and the copy start button is pressed, the document detection sensor 24a does not detect the document, In response to the detection of the original by the original detection sensor 21c and / or 21e, the standby original moving means 23a and / or 23b sequentially moves the original to the supply unit 21a, and the original is conveyed by the original conveying unit 24. .

  In the second embodiment, a drive unit (not shown) such as a solenoid is provided on the paper discharge roller 83 so that it can be moved to the left and right with respect to the paper transport direction, and the operation of moving the document from the standby unit 21b to the supply unit 21a. Each time the sheet P is discharged, the position at which the sheet P is discharged to the sheet discharge tray 84 may be shifted left and right with respect to the sheet conveyance direction. In this way, it is possible to easily distinguish between the paper on which the document image placed on the supply unit 21a and the standby units 21b and 21d is formed. Further, in this case, whether or not to shift the discharge position of the paper P can be selected on the operation panel so that the paper P can be discharged as a series of bundles when the series of originals are separately placed on the document placement tray 21. It may be.

  Further, a control button (not shown) is provided on the operation panel of the main body 11, and the control button enables the sorting means 22 and the standby document moving means 23a and 23b to be protruded or stored by the rotation of the endless belts 26a and 26b. May be. When the sorting unit 22 and the standby document moving units 23a and 23b are protruded, a large amount of documents can be continuously conveyed by performing the above-described control. Further, when stored, it is possible to place a document of a size larger than the document that can be placed on the divided supply unit 21a or standby units 21b and 21d. Here, only the sorting means 22 may be protruded or stored by the control button.

  In the second embodiment, the case where there are two standby units has been described. However, standby document moving means may be provided in each of the standby units, and three or more standby units may be provided.

  The present invention can be used not only for an image forming apparatus but also for an original conveying apparatus that is generally attached to an apparatus for reading an image of an original such as an image reading apparatus.

1 is a schematic configuration diagram of a copier that is an example of an image forming apparatus according to a first embodiment. FIG. 3 is a plan view of the document conveying device according to the first embodiment. Schematic configuration diagram of a document placing tray according to another embodiment of the first embodiment Schematic configuration diagram of a copying machine as an example of an image forming apparatus according to a second embodiment FIG. 5 is a plan view of a document conveying device according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Copy machine 12 Platen 12a Original reading part 21 Original loading tray 21a Supply part 21b Standby part 21d Standby part 22 Sorting means 23 Standby original moving means 23a Standby original moving means 23b Standby original moving means 24 Original conveying apparatus 83 Paper discharge roller 84 Paper discharge tray C Document

Claims (6)

In a document conveying device that sends a document placed on a document placing tray toward a document reading unit,
A sorting unit that protrudes from an upper surface of the document placing tray and divides the document placing tray into a supply unit on the downstream side in the document transport direction and a standby unit on the upstream side;
Standby document moving means that protrudes from the upper surface of the document placing tray and pushes the upstream end of the document placed on the standby unit in the document transport direction to move it to the supply unit;
After all the originals placed on the supply unit have been sent out, the sorting member is stored below the upper surface of the original placement tray, and the original placed on the standby unit by the standby original moving means Is moved to the supply unit. A plurality of standby sections arranged in the document transport direction on the upstream side of the document transport tray in the document transport direction, and standby document moving means provided in each of the standby sections;
After all the originals placed on the supply unit are sent out, the sorting member is stored below the upper surface of the original placement tray, and is placed on the corresponding standby unit by the standby original moving means. The placed document is moved to the supply unit or the standby unit on the downstream side in the adjacent document transport direction, and then the standby document moving unit returns to the original position via the lower side of the upper surface of the document placing tray. The document conveying apparatus according to claim 1, wherein:   The standby document moving means protruding from the upper surface of the document placing tray is moved below the upper surface of the document placing tray after the document is moved, and then the original document before the document is moved. 3. The document conveying device according to claim 2, wherein the document conveying device returns to the original position by moving downward from the position and then projecting to the upper surface of the document placing tray.   5. The document transport according to claim 1, wherein at least the sorting member among the sorting member and the standby document moving means can be stored or protruded by operating a control button. apparatus. An image forming apparatus comprising: the document conveying device according to any one of claims 1 to 4; and a sheet discharge tray on which a sheet on which an image is formed is stacked.
Each time the original is moved from the standby unit to the supply unit by the standby original moving unit, the position of the paper discharged to the paper discharge tray is shifted left and right with respect to the paper conveyance direction. .   The paper discharge roller for discharging the paper to the paper discharge tray moves left and right with respect to the paper transport direction, thereby shifting the position of the paper discharged to the paper discharge tray to the left and right with respect to the paper transport direction. The image forming apparatus according to claim 5.

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