JP2008133077A - Automatic document feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic document feeding device capable of preventing feeding failure of a document fed from above a loading tray, and enabling the document ejected on an ejecting tray to be easily visible and taken out. <P>SOLUTION: The loading tray 21 arranged above the ejecting tray 22 is composed of a tray body 41 and an auxiliary tray 42 capable of taking in and out of the tray body 41. When setting the document P of a normal size (for example, A4), the auxiliary tray 54 is stored in the tray body 41, and an inclined plate 54 is retreated downward. The document on the ejecting tray 22 is made easily visible. When setting the document P of a large size (for example, A3), the auxiliary tray 42 is extracted and arranged in a loading position M1. An inclined plate 50 is projected, and an end part of the document P is lifted, and stiffness is imparted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automatic document feeder that is disposed on an upper part of an image forming apparatus such as a copying machine or a printer and automatically conveys a document to a document processing unit.

  In an image forming apparatus such as a copying machine, a printer, or a facsimile machine, sheets are set on a sheet feeding tray, and the sheets are supplied to the image forming apparatus one by one by a sheet feeding roller. In such a paper feed tray, in order to prevent a paper feed failure, there is known a paper tray provided with a protrusion on the document placement surface (see, for example, Patent Document 1).

This is provided with protrusions at both ends in the sheet passing width direction on the upstream side in the sheet feeding direction, near the rear end of the document placing surface. These protrusions raise and curl both ends in the sheet passing width direction of the document placed on the document placement surface. This curvature gives rigidity to the sheet to prevent the trailing end of the sheet from hanging or dropping from the sheet feed tray, and further to prevent sheet feeding defects.
JP 9-175659 A

  However, when the above-described technique disclosed in Patent Document 1 is applied to an automatic document feeder in which a discharge tray is disposed below a stacking tray (paper feed tray), the following problem occurs.

  When performing image formation or faxing, a document is set on a stacking tray and conveyed from the stacking tray to an image reading unit. Then, after the image is read, the image is discharged onto a discharge tray. Since the discharged document is located below the stacking tray and is behind the stacking tray, it is difficult for the user to see it. For this reason, there is a problem that forgetting to take a document occurs. Forgetting to take this manuscript is a big problem from the viewpoint of leakage of personal information, which has recently become a problem. In addition, even when the document is not forgotten to be removed, there is a problem that when the document is taken out from the discharge tray, the stacking tray covering the upper side of the discharge tray becomes an obstacle. In particular, when handling documents of various sizes, the stacking tray tends to be large, and the documents on the discharge tray are more difficult to see and take out. In the recent use state of the automatic document feeder, the handling frequency of A4 size documents is high, and the handling size of large size documents such as B4, A3, etc. is low.

  SUMMARY OF THE INVENTION Therefore, the present invention provides an automatic document feeder that can prevent a conveyance failure of a document conveyed from a stacking tray, and that makes it easy to see and take out a document discharged on a discharge tray. It is intended.

  According to the first aspect of the present invention, a stacking tray on which documents are set, a discharge tray disposed below the stacking tray, a document on the stacking tray is conveyed to a document processing unit, and a processed document is The present invention relates to an automatic document feeder provided with a conveying means for discharging onto the discharge tray. In the automatic document feeder according to the present invention, the stacking tray includes a tray body having a first document placement surface on which a document is placed with reference to the front end and at least one side edge thereof, and the tray body stores the tray. And a stacking position that is drawn upstream from the tray body, and supports an upstream portion of a large-sized document that protrudes upstream from the first document placement surface at the stacking position. An auxiliary tray having a second document placement surface, wherein the auxiliary tray is located upstream of the second document placement surface and at an end in the sheet passing width direction. And a protrusion that protrudes upward from the document and lifts the edge of the document upward.

  According to a second aspect of the present invention, in the automatic document feeder according to the first aspect, the protrusion includes an inclined plate that is swingably supported by an auxiliary tray, and the inclined plate is urged upward so that the original can be scanned. And an urging member disposed at a projecting position for lifting the end portion.

  According to a third aspect of the present invention, in the automatic document feeder according to the second aspect, the inclined plate abuts a part of the tray body when the auxiliary tray is disposed at the storage position, and It is characterized in that it is disposed at a retracted position that is substantially the same height as the second document placement surface.

  According to the first aspect of the present invention, for example, if the size of the tray main body of the stacking tray is set in correspondence with the size of a frequently used document (for example, A4 size), the tray main body The area covering the upper side of the discharge tray disposed below can be reduced. Therefore, the tray main body does not get in the way when taking out frequently used documents of normal size from the discharge tray. By the way, since the tray body is set to a size that matches a normal-size document, if a large-size document (for example, B4 / A3 size) is placed on the first document placement surface of the tray body, the tray body is large. In the size document, an upstream portion (rear end side in the transport direction) located on the upstream side in the transport direction protrudes from the first document stacking surface and hangs down. Therefore, in the present invention, the auxiliary tray stored in the tray body is pulled out, and the upstream side portion of the large-size document is supported by the second document placement surface. At this time, a protrusion is formed on the second document placement surface, and the end of the large-sized document is lifted upward by this protrusion, so that the waist is attached (given rigidity). A large-size document is smoothly transported from the first document placement surface of the tray main body and the second document placement surface of the auxiliary tray without any transportation failure such as skew or paper jam.

  According to the second aspect of the present invention, the protrusion includes the inclined plate that is swingably supported by the auxiliary tray, and the urging member that urges the inclined plate upward to be disposed at the protruding position. The inclined plate can be retracted downward against the urging force of the urging member.

  According to the invention of claim 3, when the auxiliary tray is disposed at the storage position where the auxiliary tray is stored in the tray body, the inclined plate comes into contact with a part of the tray body and is substantially the same as the second document placement surface. Since it is disposed at the retreat position having the same height, the thickness of the tray main body can be reduced as compared with the case where the inclined plate is not retracted.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings. In addition, in each drawing, the member etc. which attached | subjected the same code | symbol are the same structures, The duplication description about these shall be abbreviate | omitted suitably. Moreover, in each drawing, members and the like that are not necessary for the description are omitted as appropriate.

<Embodiment 1>
An automatic document feeder 1 according to the present invention will be described with reference to FIGS. Among these, FIG. 1 is a perspective view showing the external appearance of the image forming apparatus 2 and the automatic document feeder 1 disposed on the image forming apparatus 2 as viewed obliquely from the upper left on the front side. In the following description, the front, rear, left, right, top and bottom of the automatic document feeder 1 are in the directions of the arrows shown on the left side in FIG. FIG. 2 is a schematic view of a vertical section along the document conveyance direction of the automatic document conveyance device 1 as viewed from the front side. The direction of arrow A in the figure is the downstream side along the document conveyance direction, and the direction of arrow B is the upstream side along the document conveyance direction. FIG. 3A is a perspective view of the automatic document feeder 1 in a state in which the auxiliary tray 42 is pulled out from the tray main body 41 and disposed at the stacking position M1, as viewed from diagonally upward on the front right side. FIG. 3B is an enlarged cross-sectional view of the portion indicated by the arrow C in FIG. FIG. 4 is a perspective view of the automatic document feeder 1 just before the auxiliary tray 42 is accommodated in the tray main body 41 as viewed from the front right and diagonally upward. In addition, the dashed-two dotted line in the figure has shown the auxiliary | assistant tray 42 of the state accommodated in the accommodation position M2. FIG. 5 is an enlarged perspective view of the protrusion 53. FIG. 6 is a view taken along line XX in FIG.

  As shown in FIG. 1, an automatic document feeder 1 according to the present invention is installed on an upper part of an image forming apparatus 2 which is a complex machine such as a copying machine, a printer, and a facsimile machine. The image forming apparatus 2 shown in the figure is formed in a rectangular parallelepiped shape. The image forming apparatus 2 includes an image forming unit 10 that forms an image on a sheet (a recording medium such as paper or transparent film), a sheet storage unit 11 that stores a sheet, and an image reading unit (original processing unit) that reads an image of a document. ) 12.

  For example, the image forming unit 10 forms an electrostatic latent image on a photosensitive drum (not shown) based on the image information of the document read by the image reading unit 12, and develops the electrostatic latent image with toner. Further, the toner image is transferred to a sheet and then fixed to the sheet. The sheet on which the toner image is fixed is discharged onto a paper discharge tray 13 formed on the upper surface of the image forming unit 10.

  Three sheet cassettes 14 are arranged in the sheet storage unit 11. The paper feed cassette 14 stores a plurality of sheets on which images are formed by the image forming unit 10 in a stacked state. Each paper feed cassette 14 can be pulled out to the front side, and stores sheets of different sizes, for example, sheets of A3 size, B4 size, and A4 size in order from the bottom. These sheets are fed from a sheet feeding cassette 14 by a sheet feeding device (not shown) and supplied to the image forming unit 10 described above.

  The image reading unit 12 is supported by a support unit 15 provided on the left end side of the image forming unit 10 described above, and is disposed above the paper discharge tray 13. A first platen glass 16, a left indicating plate 17, and a second platen glass 18 are disposed on the upper surface of the image reading unit 12. The first platen glass 16 is used for so-called fixed reading in which an original is fixed and an image is read by moving a light source (not shown). The document is set at the reading position with its left end in contact with the left indicating plate 17 and its rear end in contact with a rear indicating plate (not shown). The second platen glass 18 is used for so-called flow reading, in which an original is moved and a light source is fixed to read an image. A strip-shaped reading line R is set on the second platen glass 18 along the front-rear direction. The original is conveyed across the reading line R by an automatic original conveying apparatus 1 described later, and an image is read at this time. In both of the above-described fixed reading and flow reading, an image is read by irradiating a document with light from a light source and inputting the reflected light to a CCD (not shown) via a lens (not shown). It has become. As shown in FIG. 1, an operation panel 19 having a display panel 19 a and operation buttons 19 b is disposed on the front end side and the right end side of the image reading unit 12.

  In the image forming apparatus 2 described above, a toner image is formed on the sheet supplied from the paper feed cassette 14 to the image forming unit 10 based on the image information of the original read by the image reading unit 12, and toner image formation is performed. The subsequent sheet is discharged onto the paper discharge tray 13. When the image forming apparatus 2 is used as a facsimile, image information of a document conveyed by an automatic document conveying device 1 described later is read by the image reading unit 12 and the image information is transmitted. It has become. This is the end of the description of the image forming apparatus 2.

  Next, the automatic document feeder 1 will be described in detail. The automatic document feeder 1 is disposed so as to cover the upper surface of the image reading unit 12 of the image forming apparatus 2 described above, and can swing so that the front end side moves substantially vertically with respect to the rear end side. It is supported. As shown in FIGS. 1 and 2, the automatic document feeder 1 reads an image of a stacking tray 21, a discharge tray 22 disposed below the stacking tray 21, and a document P set on the stacking tray 21. A document conveying unit (conveying means) 23 that conveys the document P after image reading onto the discharge tray 22.

  The stacking tray 21 includes a tray main body 41 and an auxiliary tray 42 that can be inserted into and removed from the tray main body 41. The stacking tray 21 will be described in detail later.

  The document transport unit 23 starts from the uppermost document P among a plurality of documents P set at a predetermined position (described later) on the stacking tray 21 above the upstream end (left end) of the stacking tray 21. A paper feed roller 24 for feeding paper in order is provided. The document P fed by the rotation of the sheet feeding roller 24 in the direction of arrow E is conveyed by the conveying belt 25 that is stretched between the driving roller 25a and the driven roller 25b and rotates in the direction of arrow F. Double feed is prevented by the retard roller 26 rotating in the G direction, and the sheets are conveyed downstream in a separated state. The conveyed document P is further conveyed to the reading line R by a conveying roller pair 27, a large-diameter common roller 28, and small-diameter conveying rollers 30, 31, and 32. When the document P passes through the reading line R, the image is read by the image reading unit 12 described above. The document P after image reading is guided obliquely upward and to the right by the left instruction plate 17 and is discharged onto the discharge tray 22 by the transport roller 33, the transport roller pair 34, the discharge roller pair 35, and the like. When there is an image to be read on the back side of the document P, the back side image is read by the contact image sensor 36 disposed facing the transport roller 33.

  As shown in FIGS. 3A and 4, the stacking tray 21 includes a tray body 41 and an auxiliary tray 42. In the present embodiment, the tray main body 41 is formed in a substantially rectangular plate shape, and the first document placement surface 43 on the upper surface has a frequently used size (for example, A4, letter size, etc.) frequently used. It is possible to support substantially the entire document P in the landscape orientation (the direction in which the longitudinal direction is aligned with the sheet passing width direction) from below. In the vicinity of the front end and the rear end of the first document placement surface 43, long plate-like side regulating plates 44 and 45 are erected with their longitudinal directions directed in the document conveyance direction. Of these, the front side restricting plate 44 restricts the position of the front end (left end in the document transport direction) of the document P placed on the first document placing surface 43, and the rear side restricting plate 44. The plate 45 regulates the position of the rear end (right end in the document transport direction) of the document P. These side regulating plates 44 and 45 are configured to be movable in the paper passing width direction (front-rear direction) of the document P, and are interlocking mechanisms (not shown) disposed inside the tray body 41, for example, rack and pinion. The interlocking relationship is set by. That is, when one side regulating plate 44 (or 45) is moved inward, the other side regulating plate 45 (or 44) is also moved inward by the same distance, and conversely, one side regulating plate 44 is moved. When (or 45) is moved outward, the other side regulating plate 45 (or 44) is also moved outward by the same distance. As described above, in the present embodiment, the document P set on the stacking tray 21 is centered in the sheet passing width direction even if the center reference, that is, the size of the document P in the sheet passing width direction (front-rear direction) is different. It is designed to be positioned with reference to. Further, the left end of the document P (the leading end in the document transport direction) is positioned by the leading end regulating plate 46 (see FIG. 2). In this way, the position positioned by the front end restricting plate 46 and the side restricting plates 44 and 45 is a predetermined position of the document P. A size detection sensor (not shown) is disposed inside the tray body 41. The size detection sensor detects the positions of the side regulating plates 44 and 45 that are in contact with the front end and the rear end of the document P placed on the first document placement surface 43, thereby causing the document P to pass in the sheet passing width direction. It detects the size of. As shown in FIG. 2, the tray main body 41 has a downstream end (left end) disposed below the paper feed roller 24, and an upstream end (right end) higher than the downstream end. The main document frame 47 of the automatic document feeder 1 is supported in such a slanted state. A storage space S for storing an auxiliary tray 42 to be described below is provided inside the tray body 41. Here, if the thickness on the upstream side of the tray body 41 is T, the storage space S is provided between the upper plate 41a and the lower plate 41b of the tray body 41, and the height h of the storage space S is The thickness is set slightly larger than the thickness t of the auxiliary tray 42 described later.

  The auxiliary tray 42 is formed in a substantially rectangular plate shape. The storage position M2 is stored in the tray main body 41 described above, and a large-size (for example, B4, A3) document is drawn upstream from the tray main body 41. The loading position M1 that supports the upstream portion of P from below can be taken. The dimension of the auxiliary tray 42 in the sheet passing width direction is set shorter than that of the tray main body 41 in the sheet passing width direction and longer than half thereof. Further, the width of the storage space S in the sheet passing width direction is set to be shorter than the width of the tray body 41 in the sheet passing width direction, and the entire storage space S is provided so as to approach the rear end side of the tray body 41. ing.

  Here, FIG. 3A shows a state where the auxiliary tray 42 is disposed at the stacking position M1, that is, a state where the auxiliary tray 42 is pulled out to the maximum extent. In this state, as shown in FIG. 3B, the stopper 48 provided at the front end and the rear end of the auxiliary tray 42 on the upstream end side (however, only the front end is shown in FIG. 3B). The engaging convex portion 48a is elastically engaged with the engaging concave portion 41d provided on the inner wall 41c of the tray main body 41 so that the auxiliary tray 42 cannot be pulled out any more. That is, the auxiliary tray 42 is held at the stacking position M1. In order to pull out the auxiliary tray 42 from the tray main body 41, the base end portion 48b of the stopper 48 is pushed in the direction of the arrow H to release the engagement of the engaging convex portion 48a from the engaging concave portion 41d, and then pull out. . Further, the auxiliary tray 42 at the loading position M1 can be naturally released from the engagement convex portion 48d with respect to the engagement concave portion 41d by being pushed toward the tray main body 41 with a slightly stronger force. By pushing, the auxiliary tray 42 can be stored in the tray main body 41.

  FIG. 4 shows that the auxiliary tray 42 is pushed in the direction of the arrow, and the auxiliary tray 42 is in a state just before the tray main body 41 is completely accommodated, that is, an inclined plate 50 described later starts to be applied to a part of the tray main body 41. Indicates the state. The auxiliary tray 42 has an engaging projection 48a of the stopper 48 between the stacking position M1 shown in FIG. 3A and the storage position M2 shown by a two-dot chain line in FIG. By pushing the inner wall 41c outward, it can be stopped in a stable state at an arbitrary position. That is, according to the transport direction length of the document P placed on the stacking tray 21, the pull-out length of the auxiliary tray 42 is minimized, the area covering the lower discharge tray 22 is reduced, and the upper side of the discharge tray 22 is Forgetting to remove the original P can be prevented, and it can be made easy to take out.

  The auxiliary tray 42 has a second document placement surface 51 on the upper surface, and a size detection sensor 52 is disposed on the second document placement surface 51. The size detection sensor 52 detects the length of the document P in the conveyance direction, while the size detection sensor in the tray main body 41 detects the sheet passing width of the document P. The size detection sensor 52 operates only when the auxiliary tray 42 is pulled out. By combining the output results of these size detection sensors, the size of the document P can be detected. For example, in the state where the document P is set at a predetermined position with its left end abutted against the front end restricting plate 46 and its front and rear ends abutted against the side restricting plates 44 and 45, the size detection sensor on the tray body 41 side is When the long side of A4 is detected as the sheet passing width, when the auxiliary tray 42 is not pulled out or is pulled out but is not detected by the size detection sensor 52, the document P is A4 size and placed sideways. to decide. On the other hand, when the size detection sensor on the tray body 41 side detects the long side of A4 as the sheet passing width and the size detection sensor 52 on the auxiliary tray 42 side detects the document P, the document P is A3 size. It is judged that it is.

  As shown in FIGS. 3A and 4, at least one end of the auxiliary tray 42 on the upstream side of the second document placement surface 51 and in the sheet passing width direction (both ends in the present embodiment). Is provided with a protrusion 53. FIG. 5 shows an enlarged view of the protrusion 53. FIG. 6 is a view taken along the line XX in FIG. The protrusion 53 includes an inclined plate 50 and a coil spring (biasing member) 54 used as a compression spring. The inclined plate 50 is formed in a substantially triangular plate shape. The inclined plate 50 is provided with thin plate-like arms 55 (only one arm is shown in FIG. 6) at two positions on the back side of the portion 50a corresponding to the oblique side. A hole (not shown) is formed. A shaft 56 disposed on the auxiliary tray 42 side passes through the through hole. As a result, the inclined plate 50 can swing substantially vertically about the shaft 56. As shown in FIGS. 5 and 6, a slit 57 through which the arm 55 passes when the inclined plate 50 swings is provided on the auxiliary tray 42 side. Below the inclined plate 55, a pedestal 58 is provided in which the lower surface side of the auxiliary tray 42 is projected substantially in the same shape as the inclined plate 50. A coil spring 54 as an urging member is interposed between the pedestal 58 and the back surface of the inclined plate 50. The inclined plate 55 is biased obliquely upward by the coil spring 54. In the natural state of the coil spring 54 shown in FIGS. 3 (a), 5 and 6, the corners are positioned upward. It is inclined so as to protrude from the second document placing surface 51. Regarding the strength of the coil spring 54, when a plurality of documents P are placed on the inclined plate 50, the inclined posture of the inclined plate 50 is maintained without being compressed, as will be described later. When the auxiliary tray 42 is housed in the tray main body 41, the inclined plate 55 is set so as to be relatively easily compressed and retracted. As the urging member, a plate spring, a torsion spring, or the like can be used instead of the coil spring 54.

  As described above, the inclined plate 50 of the auxiliary tray 42 is urged by the coil spring 54 when the auxiliary tray 42 is pulled out, and the protruding position N1 in the inclined state (FIG. 3A, FIG. 5). (See FIG. 6). On the other hand, when the auxiliary tray 42 is stored in the tray main body 41 and disposed at the storage position M2, it is retracted to the retracted position. As shown in FIG. 4, when the auxiliary tray 42 that has been pulled out is pushed in the direction of arrow J and stored in the tray main body 41, the inclined plate 50 held at the protruding position N <b> 1 by the biasing force of the coil spring 54 is When the downstream end contacts the upper plate 41a of the tray body 41, the upper plate 41a retracts downward. When the auxiliary tray 42 is further pushed into the storage space S of the tray main body 41, the inclined plate 50 is gradually pushed downward by the upper plate 41a, and when almost the entire auxiliary tray 42 is stored, the second original document is stored. It is disposed at a retracted position that is substantially the same height as the mounting surface 51.

  As described above, the automatic document feeder 1 arranges the auxiliary tray 42 at the storage position M <b> 2 of the tray body 41 when the regular size document P is transported from the stacking tray 21. Thereby, the occupation area of the entire stacking tray 21 positioned above the paper discharge tray 22 can be reduced. For this reason, since the document P discharged onto the discharge tray 22 can be easily viewed, the user does not forget to remove it from the discharge tray 22. Further, when taking out the original P discharged onto the discharge tray 22, the stacking tray 21 is not easily obstructed. Further, in the state where the auxiliary tray 42 is stored in the storage space S of the tray main body 41, that is, in the state where it is disposed at the storage position M2, the inclined plate 50 is disposed at the retracted position. Since h only needs to be set slightly larger than the thickness t of the auxiliary tray 42, an increase in the thickness T of the tray main body 41 can be suppressed accordingly.

  Next, when a large-size document P is transported from the stacking tray 21, the auxiliary tray 42 is pulled out from the tray body 41 and placed at the stacking position M1. As a result, the stacking surface for supporting the document P becomes the first document stacking surface 43 of the tray main body 41 and the second document placement surface 51 of the auxiliary tray 42 added to the upstream side thereof. Even in this case, the auxiliary tray 42 whose dimension in the sheet passing width direction is shorter than that of the tray main body 41 is arranged so as to be aligned with the rear end side of the tray main body 41. A space K for viewing is formed. When the auxiliary tray 42 is pulled out from the tray body 41, it is biased by the coil spring 54, and the inclined plate 54 is disposed at the upper protruding position N1. When a large-size document P is placed on the stacking tray 21 in this state, the downstream portion of the document P is placed on the first document placement surface 43 of the tray body 41, and the upstream portion of the document P is the auxiliary tray. 42 on the second document stacking surface 51 and the inclined plate 50. As a result, the upstream portion of the large-sized document P does not protrude from the stacking tray 21 and hangs downward, and the end portion is lifted by the inclined plate 55 and curved to increase the rigidity. Can be prevented.

  In the above description, the case where the present invention is applied to an automatic document conveying apparatus has been described as an example. However, the present invention can be widely used in a general sheet conveying apparatus having a discharge tray below a stacking tray.

FIG. 3 is a perspective view showing the external appearance of the image forming apparatus and the automatic document feeder disposed on the upper part, as viewed from the upper front left side. FIG. 4 is a schematic view of a longitudinal section along the document conveyance direction of the automatic document conveyance device viewed from the front side. (A) is the perspective view which looked at the automatic document feeder of the state which the auxiliary tray was pulled out from the tray main body and has been arrange | positioned in the stacking position from diagonally upper right front side. FIG. 3B is an enlarged cross-sectional view in the substantially horizontal direction of the arrow C portion in FIG. FIG. 3 is a perspective view of the automatic document feeder just before the auxiliary tray is housed in the tray body, as viewed from obliquely upward on the front right side. It is an expansion perspective view of a protrusion. It is a XX arrow directional view in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Automatic document conveying apparatus, 2 ... Image forming apparatus, 12 ... Image reading part (original processing part), 21 ... Loading tray, 22 ... Ejection tray, 23 ... Original conveying part (conveying means) 41 …… Tray body, 42 …… Auxiliary tray, 43 …… First document placement surface, 50 …… Inclined plate, 51 …… Second document placement surface, 53 …… Projection, 54 …… Coil Spring (biasing member), M1 ... stacking position, M2 ... storage position, N1 ... projecting position, P ... original

Claims (3)

A stacking tray on which documents are set, a discharge tray disposed below the stacking tray, and a transport for transporting documents on the stacking tray to a document processing unit and discharging processed documents onto the discharge tray. In an automatic document feeder provided with means,
The loading tray is
A tray body having a first document placement surface on which a document is placed with reference to the front end and at least one side end;
The storage position stored in the tray main body and the stacking position drawn upstream from the tray main body are taken, and at the stacking position, the upstream of a large-sized document protruding upstream from the first document placement surface. An auxiliary tray having a second document placement surface for supporting the side portion,
The auxiliary tray protrudes upward from the second document placement surface at the upstream end of the second document placement surface and at the end in the sheet passing width direction, and lifts the end portion of the document upward. Having a part,
An automatic document feeder characterized by that. The protrusion includes an inclined plate that is swingably supported by an auxiliary tray, and an urging member that is disposed at a protruding position that urges the inclined plate upward to lift the end of the document.
The automatic document feeder according to claim 1. The inclined plate abuts a part of the tray main body when the auxiliary tray is disposed at the storage position, and is disposed at a retreat position having substantially the same height as the second document placing surface. ,
The automatic document feeder according to claim 2.

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