JP2007320707A - Document feeder and image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a document feeder and an image reader capable of reliably preventing a document discharged to the discharging position from being left behind. <P>SOLUTION: An ADF (an Automatic Document Feeder) 1 is capable of stacking and loading a plurality of sheet-like documents P at a predetermined paper feed position, feeding the loaded documents P to a document reading position RP one by one, and discharging the documents to the predetermined discharging position set on the lower side of the paper feed position, and comprises a paper feed tray 11 with its top face being formed in a substantially flat shape at the paper feed position, a paper discharge tray 15 with its top face being formed in a substantially flat shape at the discharging position, and a movable tray 12 which is elevated/lowered between the paper feed position and the paper discharge position so that the top face supports a part of the document P at the paper feed position and the paper discharge position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is configured to be capable of stacking and placing a plurality of sheet-like originals at a predetermined paper feeding position, and after feeding the placed originals to a predetermined position one by one, the paper feeding position The present invention relates to a document feeding device and an image reading device that discharge to a predetermined discharge position set below the image. In particular, the present invention relates to a scanner, a copier, a facsimile machine, and a multifunction machine having any one of these functions.

  A plurality of sheet-like originals can be stacked and placed at a predetermined paper feed position, and the placed originals are fed one by one to the image reading position by the scanner, and then the paper feed position. There is known an image reading apparatus such as a copying machine provided with a document feeding device that discharges to a predetermined discharge position set below. In such a copying machine, when an operation to start copying is input, the originals set at the paper feed position are sequentially conveyed to the image reading position one by one and discharged to the discharge position. Laminated. The original discharged to the discharge position is taken out by the user after the copying is completed.

  However, in the above copying machine, the discharge position is set below the paper feed position, and the interval between the discharge position and the paper feed position is minimized to meet the demand for miniaturization of the copying machine. Therefore, the document discharged to the discharge position is difficult to be visually recognized by the user. As a result, the user is unaware of the presence of the document ejected at the ejection position and may forget to remove the document.

Various copiers have been proposed to solve the above problems. For example, when it is determined that the document discharged to the discharge position has not been removed based on a signal from a discharged document detection sensor that detects the presence or absence of the document discharged to the discharge position, the document is displayed on the display panel. There has been disclosed a copying machine that displays that it still exists on the document discharge tray (see Patent Document 1). According to this copying machine, it is possible to prevent the user from forgetting to remove the document discharged to the discharge position.
JP 2001-312106 A

  However, since various information such as guidance information and setting information is displayed on the display panel, the user does not always recognize and accurately grasp the information displayed on the display panel. For example, when copying a small number of sheets, there is a case where the consciousness is concentrated on bringing back the printed recording paper after performing an operation to start copying. In such a case, the user may forget to remove the document discharged to the discharge position even though the display panel indicates that the document is still on the document discharge tray.

  SUMMARY An advantage of some aspects of the invention is that it provides a document feeding device and an image reading device that can reliably prevent forgetting to remove a document discharged to a discharge position. Yes.

  In order to achieve the above object, the document feeder according to claim 1 is configured to be capable of stacking and placing a plurality of sheet-like documents at a predetermined sheet feeding position. A document feeding device that feeds a sheet to a predetermined position for each sheet and then discharges it to a predetermined discharge position set below the paper supply position, and has an upper surface formed in a substantially flat shape at the paper supply position. A paper feed tray, a paper discharge tray whose upper surface is formed in a substantially flat shape at the discharge position, and a vertically movable between the paper feed position and the discharge position. A moving tray having an upper surface configured to support a part of the document.

  A document feeder according to a second aspect is the document feeder according to the first aspect, and includes a substantially cylindrical support member that supports the movable tray so that the movable tray can be raised and lowered. At least one end in a direction orthogonal to the paper direction is formed with a hole through which the support member is slidably penetrated.

  A document feeder according to a third aspect is the document feeder according to the first or second aspect, wherein the document feeder is disposed above the feeding position and feeds the uppermost document to a predetermined position. A substantially flat plate-like lift member that supports a paper feed roller for paper and a front end portion of a document placed on the paper feed tray and urges the front end portion of the document to be pressed against the paper feed roller during paper feeding And a driving means for driving the lift member and the moving tray, wherein the driving means moves up and down the moving tray in conjunction with the lift member.

  According to a fourth aspect of the present invention, there is provided a document feeder including the document feeder according to the third aspect and a detection unit that detects the presence or absence of a document on the sheet discharge tray. Based on the detection result, the moving tray is moved up and down.

  A document feeder according to a fifth aspect is the document feeder according to any one of the first to fourth aspects, wherein the movable tray has an upper surface supporting the document and each side of the document. When a document having a minimum size set in advance is placed at the paper feed position and the discharge position, one vertex of the rectangle is formed on the rectangle of the minimum size. It is characterized by being formed so as to substantially coincide with the center position.

  An image reading apparatus according to a sixth aspect reads the image formed on the original document feeding apparatus according to any one of the first to fifth aspects and the original document supplied from the original document feeding apparatus, and the image And image information generating means for generating image data corresponding to.

  An image reading apparatus according to a seventh aspect is the image reading apparatus according to the sixth aspect, wherein the image reading apparatus is disposed at one end portion in a direction orthogonal to a paper feeding direction of the image reading apparatus and is operated from the outside. An operation means for receiving is provided, and an upper surface for supporting a document on a moving tray provided in the document feeding device is provided on the one side on which the operation means is provided. .

  According to the document feeding device of the first aspect, the upper surface of the moving tray supports a part of the discharged document at the discharging position, and the upper surface of the moving tray is between the feeding position and the discharging position. Since there is a space that moves up and down (= a space corresponding to the trajectory of the upper surface of the moving tray that is moving up and down), the document placed at the discharge position can be visually recognized through this space, and is discharged to the discharge position. It is possible to reliably prevent forgetting to remove the original.

  According to the document feeding device of the second aspect, the substantially cylindrical shape is formed through the hole portion that is formed at at least one end in the direction orthogonal to the feeding direction and penetrates the support member. Since the moving tray is supported by the support member so as to be movable up and down, the moving tray can be lifted and lowered to form an accurate trajectory with a simple configuration.

  According to the document feeding device of the third aspect, the moving tray is moved up and down in conjunction with the substantially flat lift member that biases the leading end of the document against the feeding roller during feeding. The drive means for the lift member is also used as the drive means for raising and lowering the moving tray, so that the apparatus can be simplified.

  According to the document feeder of the fourth aspect, since the moving tray is moved up and down based on the detection result of the presence or absence of the document on the paper discharge tray, the moving tray can be moved up and down at an appropriate timing. For example, the moving tray can be lowered to the discharge position when feeding is started, and the moving tray can be raised to the feeding position when the discharged document is removed.

  According to the document feeding device of the fifth aspect, when a document of a minimum size set in advance is placed at the feeding position and the discharging position, the rectangular paper that forms the upper surface that supports the document on the moving tray. Since the apex of 1 is formed so as to substantially coincide with the center position of the minimum-size document, the space in which the upper surface of the moving tray moves up and down between the paper feeding position and the discharge position (= up and down of the upper surface of the moving tray) The space corresponding to the inner trajectory) can be formed at an appropriate position and size, so that forgetting to remove the original discharged to the discharge position can be prevented more reliably. In other words, even when the document is a minimum-size document, a portion of approximately 1/4 of the total area of the document is supported by the upper surface of the moving tray, so that the document discharged to the discharge position can be surely seen. can do.

  According to a sixth aspect of the present invention, there is provided the document feeder according to any one of the first to fifth aspects, and an image formed on a document supplied from the document feeder is read. Since the image data corresponding to the image is generated, the document placed at the discharge position can be visually recognized, and the image reading apparatus can reliably prevent forgetting to remove the document discharged at the discharge position. Can be realized.

  According to the image reading apparatus of the seventh aspect, the upper surface supporting the document of the moving tray disposed in the document feeding device is disposed on the side where the operation means for accepting an operation from the outside is disposed. Therefore, since the moving tray moves up and down on the side operated by the user, the visibility of the document discharged to the discharge position can be further improved.

  Hereinafter, an example of an image reading apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an example of a schematic configuration of an image reading apparatus according to the present invention. Although the case where the image reading apparatus is a scanner will be described here, a plurality of sheet-like originals can be stacked and placed at a predetermined paper feed position. Another form of image reading apparatus (for example, a facsimile, a copier, etc.) having a document feeding device that feeds paper to a predetermined position for each sheet and then discharges it to a predetermined discharge position set below the paper supply position. A multifunction machine). As shown in FIG. 1, the scanner 100 includes an image generation unit 110, an operation unit 120, a display unit 130, and a control unit 140.

  The image generation unit 110 reads an image formed on a document and generates document image information. The image generation unit 110 includes an image reading unit 111 and an ADF (Automatic Document Feeder) 1. The image reading unit 111 illuminates a document to be read and reads reflected light with a CCD (Charge Coupled Devices) or the like to generate document image information. An ADF 1 (corresponding to a document feeder) according to the present invention conveys a document to a document reading position of the image reading unit 111. Specifically, the ADF 1 is configured to be capable of stacking and placing a plurality of sheet-like originals at a predetermined paper feed position, and the original reading position of the image reading unit 111 for each of the placed originals. Is discharged to a predetermined discharge position set below the paper feed position.

  The operation unit 120 receives operation input from the user, generates operation input information corresponding to the received operation input, and outputs the operation input information to the control unit 140 (CPU 141). The operation unit 120 includes, for example, various buttons such as a numeric keypad and a start button, and a touch panel formed integrally with an LCD disposed on the display unit 130.

  The display unit 130 includes an LCD (Liquid Crystal Display), an LED (Light Emitting Diode), and the like, and displays setting information, guidance information, message information, and the like that are visible to the user based on instructions from the control unit 140 (CPU 141). To do. Further, the display unit 130 is provided with a buzzer that outputs a buzzer sound when an abnormality occurs (here, forgetting to remove the document discharged to the discharge position) as an alarm.

  The control unit 140 controls the operation of the entire scanner 100, and includes a CPU (Central Processing Unit) 141, a RAM (Random Access Memory) 142, and a ROM (Read Only Memory) not shown. .

  FIG. 2 is a configuration diagram illustrating an example of the configuration of the ADF 1. (A) is a top view, (b) is side sectional drawing. The ADF 1 includes a paper feed tray 11, a moving tray 12, a lift member 13, a paper feed roller 14, a paper discharge tray 15, and a paper discharge detection sensor 16.

  The paper feed tray 11 has a top surface formed in a substantially flat shape at a predetermined paper feed position, and a plurality of sheet-like documents P are stacked and placed on the top surface. Further, the paper feed tray 11 is formed in a substantially rectangular flat plate shape with a part (corresponding to the moving tray 12) cut out, and one end thereof (here, the upper end of the paper feed tray 11 in FIG. 1A). ) Is locked to the side wall of the casing of the ADF 1.

  The moving tray 12 is configured to be movable up and down between a paper feed position and a discharge position, and the upper surface is configured to support a part of the document P at the paper feed position and the discharge position. That is, when the moving tray 12 is raised (position indicated by a solid line in the drawing), the upper surface of the moving tray 12 supports a part of the original P placed at the paper feeding position (the lower right portion of the original P in FIG. 1A). When lowered (position indicated by a broken line in the figure), the upper surface thereof is configured to support a part of the original P placed at the discharge position (the lower right portion of the original P in FIG. 1A). It is.

  The lift member 13 supports the leading end portion of the document P placed on the sheet feeding tray 11 (left end portion of the document P in the drawing), and at the time of feeding, the leading end portion of the document P (left end portion of the document P in the drawing). Is substantially flat so as to be urged upward so as to be pressed against the paper feed roller 14. Further, the lift member 13 has a proximal end locked to the rotary shaft 23 shown in FIG. 4, and the tip of the lift member 13 moves up and down as the rotary shaft 23 rotates.

  The paper feed roller 14 is disposed above the original P placed at the paper feed position, and the uppermost original P is placed at a predetermined position (here, the image reading unit 111 shown in FIG. 1 is formed on the original P). Paper is fed to the original reading position RP) which is the position of the original P when reading an image.

  The paper discharge tray 15 has a top surface formed in a substantially flat shape at a predetermined paper discharge position, and a document P conveyed through the document reading position RP is stacked and placed on the top surface. Further, the upper surface of the paper discharge tray 15 is formed in a substantially rectangular flat plate shape with a part cut off (a portion corresponding to the moving tray 12), and end faces in four directions are integrated with the side wall of the casing of the ADF 1. Is formed.

  The paper discharge detection sensor 16 (corresponding to detection means) detects the presence or absence of the document P on the paper discharge tray 15, and includes, for example, a reflective photo interrupter. That is, when there is a document P on the paper discharge tray 15, the light emitted from the photo interrupter is reflected by the document P and detected by the photo interrupter, so that the document P is detected. . Further, when there is no document P on the paper discharge tray 15, the light reflected from the document P of the light emitted from the photo interrupter is not detected by the photo interrupter. .

  Here, the drive mechanism of the moving tray 12 will be described with reference to FIGS. 3 and 4. FIG. 3 is a configuration diagram (plan view) of the drive mechanism of the moving tray 12. However, for the sake of convenience, a member that blocks the drive mechanism 2 of the moving tray 12 when viewed from above is shown as being seen through. FIG. 4 is a view for explaining that the moving tray 12 is moved up and down by the rotation of the link rod 24 around the rotation shaft 23. As shown in FIG. 3, the drive mechanism 2 for the moving tray 12 includes a motor 21, a gear 22, a rotating shaft 23, a link rod 24, an engagement member 25, and a support member 26.

  The motor 21 rotates the rotary shaft 23 via the gear 22 in accordance with an instruction from the control unit 140 shown in FIG. The gear 22 transmits the torque from the motor 21 to the rotating shaft 23 at a reduced speed.

  The rotating shaft 23 is rotatably supported by a support hole 231 formed in the side wall SW of the casing of the ADF 1, and rotates by torque transmitted from the motor 21 via the gear 22. The link rod 24 moves the moving tray 12 up and down by the torque of the rotating shaft 23, and the base end portion (the left end portion in FIG. 3) is locked to the rotating shaft 23, and the distal end portion (the right end portion in FIG. 3). ) Is formed in a substantially L shape so as to engage with the engaging member 25.

  The engaging member 25 is formed at one end (upper end in FIG. 3) of the moving tray 12, is formed integrally with the moving tray 12, and engages with the link rod 24 to raise and lower the moving tray 12. It is. Further, the end of the engaging member 25 on the side of the link rod 24 is formed in a hollow rectangular shape in a side view (see FIG. 4C), and the distal end portion of the link rod 24 is inserted into the hollow portion. (See FIG. 4A). Further, in the vicinity of the side wall of the engaging member 25, a hole 251 through which the support member 26 passes is formed.

  The support member 26 is a substantially cylindrical member that has an upper end and a lower end engaged with the paper feed tray 11 and the paper discharge tray 15, respectively, and supports the movable tray 12 so as to be movable up and down. That is, the support member 26 slidably penetrates a hole 251 formed in the engaging member 25 formed integrally with the moving tray 12 and functions as a guide for moving the moving tray 12 up and down along the support member 26. Is.

  Next, the operation of the drive mechanism 2 will be described with reference to FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a rear view (viewed from the right side of FIG. 4B). When the moving tray 12 is lowered, first, the motor 21 is driven to rotate the link bar 24 in a predetermined direction (counterclockwise in FIG. 4C). Along with this, the tip end of the link bar 24 descends, and the engaging member 25 engaged with the tip end is urged downward. Then, when the engaging member 25 is lowered along the support member 26, the movable tray 12 formed integrally with the engaging member 25 is lowered to the broken line position in the figure corresponding to the paper discharge position.

  Conversely, when the moving tray 12 is raised, the motor 21 is first driven to rotate the link rod 24 in the reverse direction (clockwise in FIG. 4C). Along with this, the tip of the link rod 24 rises, and the engaging member 25 engaged with the tip is biased upward. Then, when the engaging member 25 rises along the support member 26, the movable tray 12 formed integrally with the engaging member 25 rises to the solid line position in the figure corresponding to the paper feeding position.

  FIG. 5 is a flowchart showing an example of the operation of the control unit 140 shown in FIG. First, it is determined whether or not a document is set on the paper feed tray 11 (paper feed position) (S101). If it is determined that the document is not set (No in S101), the process is in a standby state. If it is determined that the document is set (Yes in S101), an operation to start reading is accepted from the operation unit 120, and the reading operation is started (S103).

  Next, the motor 21 is driven, the lift member 13 is raised, and the moving tray 12 is lowered (S105, S107). Then, it is determined whether or not a predetermined time T1 (= time required for lowering the moving tray 12 + margin time: for example, 2 seconds) has elapsed (S109). When it is determined that the predetermined time T1 has not elapsed (No in S109), the process is set in a standby state. When it is determined that the predetermined time T1 has elapsed (Yes in S109), the document feeding operation on the sheet feeding tray 11 (sheet feeding position) is started (S111).

  Then, the originals on the paper supply tray 11 (paper supply position) are fed one by one to the original reading position RP shown in FIG. 2 and discharged onto the paper output tray 15 (paper output position) (S113). ). Next, it is determined whether or not image reading has been completed for all the originals on the paper feed tray 11 (paper feed position) (whether or not the original remains on the paper feed tray 11) (S115). . If it is determined that the reading of the image has been completed (Yes in S115), it is determined whether or not the discharge detection sensor 16 is OFF (there is no document on the discharge tray 15) (S117). ). If it is determined that the paper discharge detection sensor 16 is OFF (Yes in S117), the process proceeds to step S123. If it is determined that the paper discharge detection sensor 16 is not OFF (No in S117), whether a predetermined time T2 (time for determining to forget: 5 seconds, for example) has elapsed since the completion of image reading A determination of whether or not is made (S119).

  If it is determined that the predetermined time T2 has not elapsed (No in S119), the process returns to step S117. On the other hand, when it is determined that the predetermined time T2 has elapsed (Yes in S119), the buzzer disposed in the display unit 130 shown in FIG. 1 is turned on (buzzer sound is output) (S121), and the process is stepped. The process returns to S117.

  If Yes in step S117 (when the document on the paper discharge tray 15 is removed), the buzzer disposed on the display unit 130 shown in FIG. 1 is turned off (the buzzer sound is stopped) (S123). Then, the motor 21 is driven, the lift member 13 is lowered, and the moving tray 12 is raised (S125, S127), and the process ends.

  FIG. 6 is a conceptual diagram showing the size of the upper surface of the moving tray 12 that supports the document P. FIG. 6 is a plan view, and shows a state where an A5 size original P1 and an A4 size original P2 are set on the paper feed tray 11, which is the minimum available original size. The upper surface of the moving tray 12 (hatched shaded portion in the figure) is a rectangle (here, a square), and the position of one vertex (the upper right vertex in the figure) is the center position CP of the A5 size document P1. Is substantially the same. In other words, approximately 1/4 of the A5 size original P1 is configured to be supported by the upper surface of the moving tray 12.

  Accordingly, the width W1 of the upper surface of the moving tray 12 is configured to have a size (for example, 150 mm) that substantially matches the distance W2 from the one side plate to the center line in the width direction of the document P1. The length of the upper surface of the moving tray 12 may be any size (for example, 150 mm) larger than the rear end position of the A5 size document P1. With this configuration, even when the original is a preset minimum-size original P1 (here, A5 size), approximately ¼ of the total area of the original P1 is the upper surface of the moving tray 12. Therefore, the document discharged to the discharge position can be surely visually confirmed.

  Thus, the upper surface of the moving tray 12 supports a part of the discharged document P at the discharging position, and the upper surface of the moving tray 12 moves up and down between the paper feeding position and the discharging position (= Since there is a space corresponding to the trajectory of the upper surface of the moving tray that is moving up and down, it is possible to visually recognize the document placed at the discharge position through this space. Forgetting to remove the document discharged to the discharge position It can be surely prevented.

  Further, the movable tray 12 can be moved up and down by a substantially cylindrical support member 26 through a hole 251 that is formed in at least one end in a direction orthogonal to the paper feeding direction and slidably penetrates the support member 26. Since it is supported, the moving tray 12 can be raised and lowered to form an accurate trajectory with a simple configuration.

  Further, since the moving tray 12 is moved up and down in conjunction with the substantially flat lift member 13 that urges the front end of the document P to be pressed against the paper feed roller 14 during paper feeding, the drive mechanism 2 of the lift member 13 is moved up and down. Is also used as the drive mechanism 2 for raising and lowering the moving tray 12, and the scanner 100 (ADF1) can be simplified.

  In addition, since the moving tray 12 is lifted and lowered based on the detection result of the presence or absence of the document P on the paper discharge tray 15, the moving tray 12 can be lifted and lowered at an appropriate timing. For example, the moving tray 12 can be lowered to the discharge position when paper feeding is started, and the moving tray 12 can be raised to the paper feeding position when the discharged document is removed.

The present invention can also be applied to the following forms.
In the present embodiment, the case where the drive mechanism 2 of the lift member 13 is also used as the drive mechanism 2 for raising and lowering the movable tray 12 has been described. However, in order to raise and lower the movable tray 12 separately from the drive mechanism of the lift member 13. It may be a form having a drive mechanism. FIG. 7 is a rear view (a diagram corresponding to FIG. 4C) of another drive mechanism 3 of the moving tray 12. The drive mechanism 3 includes a motor 31, a pulley 32, fixed pulleys 33 and 34, an engagement member 35, and a support member 36.

  The engagement member 35 and the support member 36 correspond to the engagement member 25 and the support member 26 shown in FIGS. 3 and 4, respectively, and have substantially the same configuration. However, one end of the engaging member 25 (the right end in FIG. 7) is engaged with the pulley 32. That is, the pulley 31 stretched around the fixed pulleys 33 and 34 is rotated by the motor 31, and the engaging member 35 locked to the pulley 32 moves up and down along the support member 36. According to this configuration, since the moving tray 12 can be lifted and lowered independently of the lifting and lowering of the lift member 13, the moving tray 12 can be lifted and lowered at a more appropriate timing.

1 is a block diagram showing an example of a schematic configuration of an image reading apparatus according to the present invention. These are the block diagrams which show an example of a structure of ADF. These are the block diagrams (plan view) of the drive mechanism of a movement tray. These are the figures for demonstrating that a movement tray is raised / lowered by rotation centering on the rotating shaft of a link rod. These are flowcharts which show an example of operation | movement of the control part shown in FIG. FIG. 4 is a conceptual diagram showing the size of an upper surface that supports a document on a moving tray. FIG. 10 is a rear view of another drive mechanism of the moving tray.

Explanation of symbols

100 Scanner (image reading device)
1 ADF (Original Feeder)
DESCRIPTION OF SYMBOLS 11 Paper feed tray 12 Moving tray 13 Lift member 14 Paper feed roller 15 Paper discharge tray 16 Paper discharge detection sensor (detection means)
2 Drive mechanism (drive means)
21 Motor 22 Gear 23 Rotating shaft 24 Link rod 25 Engagement member 26 Support member

Claims (7)

A plurality of sheet-like originals can be stacked and placed at a predetermined paper feed position. After the placed originals are fed to a predetermined position for each sheet, the paper is placed below the paper feed position. A document feeder that discharges to a predetermined discharge position,
A paper feed tray whose upper surface is formed in a substantially flat shape at the paper feed position;
A paper discharge tray whose upper surface is formed in a substantially flat shape at the discharge position;
A movable tray configured to be movable up and down between the paper feed position and the discharge position, and an upper surface configured to support a part of the document at the paper feed position and the discharge position;
A document feeder comprising: A substantially cylindrical support member that supports the movable tray so as to be movable up and down;
2. The document feeder according to claim 1, wherein the moving tray has a hole portion through which the support member is slidably penetrated at at least one end portion in a direction orthogonal to the paper feeding direction. Paper device. A paper feed roller disposed above the paper feed position for feeding the uppermost document to a predetermined position;
A substantially flat lift member that supports the leading edge of the document placed on the sheet feeding tray and urges the leading edge of the document to be pressed against the feeding roller during feeding;
Driving means for driving the lift member and the moving tray;
With
The document feeder according to claim 1, wherein the driving unit moves the moving tray up and down in conjunction with the lift member. Detecting means for detecting the presence or absence of a document on the paper discharge tray;
4. The document feeder according to claim 3, wherein the driving unit moves up and down the moving tray based on a detection result of the detection unit.   The moving tray has an upper surface supporting a document formed in a rectangle having sides substantially parallel to the sides of the document, and a document of a minimum size set in advance is placed at the paper feed position and the discharge position. 5. The document feeder according to claim 1, wherein one vertex of the rectangle is formed so as to substantially coincide with a center position of the document of the minimum size. . A document feeder according to any one of claims 1 to 5,
Image information generating means for reading an image formed on a document supplied from the document feeder and generating image data corresponding to the image;
An image reading apparatus comprising: An operation unit disposed at one end in a direction orthogonal to the paper feeding direction of the image reading apparatus and receiving an operation from the outside;
The upper surface of the moving tray disposed in the document feeding device for supporting the document is disposed on the one side where the operation unit is disposed. Image reading device.

Images