JP6693472B2 - Image reading apparatus and image forming apparatus including the same - Google Patents

Description

  The present invention relates to an image reading apparatus and an image forming apparatus including the same, and more particularly, to an image reading apparatus including a conveyance path having a curved portion having a substantially C-shaped cross section along a sheet conveyance direction, and an image formation including the same. Regarding the device.

  Some image forming apparatuses such as a copying machine, a facsimile, and a scanner are equipped with a document feeding device that automatically feeds a plurality of documents (sheets) to a document reading unit. The document feeder separates the documents one by one from the uppermost layer of the document stack stacked on the document placing tray (supply tray), and sends the documents to the document reading unit. The document is read by the document reading unit to read the image on its surface, and then discharged to a discharge tray provided at the most downstream side of the document conveying path.

  In such a document transport device, the document transport path is formed to have a curved portion having a substantially C-shaped cross section along the document transport direction. As a result, the document stack placed on the document placement tray is sent out one by one from the uppermost layer, and is stacked on the discharge tray in a state of being turned upside down. For this reason, the order of pages of the bundle of documents discharged to the discharge tray is the same as the order of pages of the bundle of documents placed on the document placing tray.

  An image reading apparatus including a document feeding path having a curved portion having a substantially C-shaped cross section along the document feeding direction is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-242242.

JP, 2009-021715, A

  However, in the conventional image reading device, when a card sheet made of resin such as a credit card and a cash card or a strong sheet such as thick paper is automatically conveyed to read an image, the sheet passes through the curved portion of the document conveying path. However, there is a problem that the image on the sheet cannot be read.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an image reading device capable of reading an image of a sheet having strong elasticity and an image forming apparatus including the image reading device. Is to provide.

  In order to achieve the above-mentioned object, the image reading apparatus having the first configuration of the present invention is configured such that a sheet on which a sheet is stacked and a sheet sent from the sheet tray pass through and a cross section along a sheet conveying direction is formed. A first transport path having a substantially C-shaped curved portion, a second transport path branched from a branch portion on the upstream side in the sheet transport direction with respect to the curved portion of the first transport path, and a sheet transport direction of the first transport path. A first discharge tray that is continuously provided on the downstream side and discharges sheets that have passed through the first transport path, and a sheet that is continuously provided on the downstream side of the second transport path in the sheet transport direction and that has passed through the second transport path is discharged. A second discharge tray, a first reading unit that is arranged on the upstream side in the sheet conveyance direction with respect to the branch portion of the first conveyance path, and that reads an image on the first surface of the sheet that passes through the first conveyance path; Of sheets that are placed in the second transport path and pass through the second transport path The second reading unit that reads the image on the second side, the third reading unit that is disposed on the downstream side in the sheet conveying direction with respect to the branching portion of the first conveying path, and that reads the image on the second side of the sheet, and the type of the sheet An acquisition unit that acquires information, a switching member that is disposed in the branching unit, and that switches the sheet discharge destination between the first discharge tray and the second discharge tray, and the posture of the switching member that changes according to the information acquired by the acquisition unit And a control unit.

  According to the image reading device of the first configuration of the present invention, the second conveyance path branched from the branch portion on the upstream side in the sheet conveyance direction with respect to the curved portion of the first conveyance path and the sheet arranged in the branch portion. A switching member that switches the discharge destination to the first discharge tray and the second discharge tray, and a control unit that switches the posture of the switching member according to the information acquired by the acquisition unit are provided. Thus, for example, in the case of a sheet such as plain paper, after the image of the sheet is read by at least one of the first reading unit and the third reading unit, the sheet is discharged to the first discharge tray, for example, a resin card or In the case of a strong sheet such as thick paper, after the image of the sheet is read by at least one of the first reading unit and the second reading unit, the sheet can be discharged to the second discharge tray. That is, for example, in the case of a sheet such as plain paper, the sheet is passed through the curved portion of the first transport path to read the image of the sheet, while in the case of a strong sheet such as a resin card or cardboard, the sheet is The image on the sheet can be read without passing through the curved portion of the first conveyance path. As described above, even in the case of a strong sheet, it is possible to read the image of the sheet without causing sheet conveyance failure.

FIG. 1 is a sectional view schematically showing the structure of an image forming apparatus including an image reading apparatus according to an embodiment of the present invention. FIG. 1 is a sectional view showing a structure of an image reading device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing a structure around a branch portion of the image reading apparatus according to the embodiment of the present invention, and is a view showing a state in which a switching member is arranged to discharge a sheet to a first discharge tray. FIG. 6 is a cross-sectional view showing a structure around a branch portion of the image reading apparatus according to the embodiment of the present invention, and is a view showing a state in which a switching member is arranged to discharge a sheet to a second discharge tray.

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

  An image forming apparatus 100 including an image reading apparatus 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. In FIG. 1, an image forming apparatus 100 (here, a digital multi-function peripheral is shown as an example) includes a multi-function peripheral 1 and an image reading device 10 arranged on the top of the multi-function peripheral 1 for reading an image of a sheet such as a document. ,,.

  The multifunction peripheral 1 includes a paper feed unit 2 that feeds a paper (recording medium), an image forming unit 3 that forms a toner image on the paper based on the image data read by the image reading device 10, and a paper feed unit. A fixing unit 4 for fixing the toner image, fixing rollers 4, discharging rollers 6a and 6b for conveying the fixed sheet and discharging it to discharging sections 5a and 5b, and a main body control section 8 for controlling the main body 1 of the multifunction machine. , Is provided. The main body control unit 8 controls the operation of the image forming apparatus 100 and can communicate with a reading device control unit 90 of the image reading device 10 described later.

  The image reading device 10 includes a reading unit 20 arranged on the top of the main body 1 of the multifunction peripheral 1 and configured to read an image of a sheet such as a document, and a sheet placed on the contact glass 21 (see FIG. 2) of the reading unit 20. A platen (sheet presser) 11 for pressing and holding is provided so as to be openable and closable, and a transport unit 30 for automatically transporting a sheet is attached on the platen 11.

  As shown in FIG. 2, a contact glass 21 composed of an automatic reading glass 21a and a manual sheet glass 21b is arranged on the upper surface of the reading unit 20. A front surface reading module (third reading unit) 25 is arranged inside the reading unit 20. The front surface reading module 25 is a CCD sensor type reading module and includes a light source, a condenser lens, and a CCD sensor (none of which is shown).

  The front surface reading module 25 reads the image of the sheet placed on the manual placement sheet glass 21b while moving in the sub-scanning direction (left and right direction in FIG. 2). Further, the front surface reading module 25 reads an image on the front surface (second surface) of the sheet conveyed by the conveying unit 30 while being stopped immediately below the automatic reading glass 21a.

  Between the automatic reading glass 21a and the manual sheet glass 21b, a conveyance guide 26 that scoops the leading edge of the sheet conveyed by the conveyance unit 30 is arranged. A white reference plate 27 for shading correction of the front surface reading module 25 is arranged below the transport guide 26.

  The transport unit 30 includes a sheet feed tray (feed tray) 31 on which sheets such as originals are stacked, and a first transport path which is disposed in the cover member 32 and through which the sheets sent from the sheet feed tray 31 pass. 33, and a first discharge tray 34 that is connected to the downstream side of the first transport path 33 in the sheet transport direction and discharges the sheet that has passed through the first transport path 33.

  The first conveyance path 33 has a curved portion 33a having a substantially C-shaped cross section along the sheet conveyance direction, and is formed so as to be inverted between a registration roller pair 44 described later and the automatic reading glass 21a. There is. A branch portion 33b is provided on the upstream side of the curved portion 33a of the first transport path 33 in the sheet transport direction, and a second transport path 35 is provided so as to extend from the branch portion 33b to the left in a substantially straight line shape. ing. On the downstream side of the second transport path 35 in the sheet transport direction, a second discharge tray 36, which discharges the sheet that has passed through the second transport path 35, is continuously provided.

  A pickup roller 41, a paper feed belt 42 and a separation roller 43, a registration roller pair 44, conveyance roller pairs 45 and 46, and a first discharge roller pair 47 are arranged along the first conveyance path 33. The paper feed belt 42 is wound around a drive roller 48a and a driven roller 48b, and the separation roller 43 is in contact with the separation roller 43 from below with a predetermined pressure. The separation roller 43 has a built-in torque limiter, and is driven to rotate with the paper feed belt 42 only when the rotational load exceeds a predetermined torque. Further, the first transport path 33 is provided with a plurality of sheet detection sensors (not shown) including a sheet feed sensor and a discharge sensor for detecting the presence or the passage of the sheet at appropriate places.

  A second discharge roller pair 49 is arranged at the downstream end of the second transport path 35 in the sheet transport direction.

  In addition, a first reading unit 51 including a contact image sensor and a first reading unit 51 are arranged to face the first reading unit 51 on the upstream side in the sheet conveyance direction with respect to the branch portion 33b of the first conveyance path 33 with the first conveyance path 33 interposed therebetween. And a first transport roller 61 that transports the sheet. The first reading unit 51 is arranged below the first transport path 33, and reads the image on the back surface (first surface) of the sheet passing through the first transport path 33. The first transport roller 61 is arranged above the first transport path 33. Further, the first transport roller 61 has an outer peripheral surface formed in white, and is used when the white reference data is acquired by the shading correction of the first reading unit 51.

  In the second conveyance path 35, there are provided a second reading unit 53 including a contact image sensor, and a second conveyance roller 63 that is arranged to face the second reading unit 53 with the second conveyance path 35 interposed therebetween and that conveys a sheet. It is provided. The second reading unit 53 is arranged on the upper side of the second transport path 35 and reads an image on the front surface (second surface) of the sheet passing through the second transport path 35. The second transport roller 63 is arranged below the second transport path 35. Further, the second transport roller 63 has an outer peripheral surface formed in white, and is used when the white reference data is acquired by the shading correction of the second reading unit 53.

  A switching member 71 that switches the sheet discharge destination between the first discharge tray 34 and the second discharge tray 36 is provided at the branch portion 33b of the first transport path 33. Further, a thickness detection sensor (acquisition unit) 72 that detects the thickness of the sheet (information about the type of the sheet) is provided on the upstream side in the sheet conveyance direction with respect to the branch portion 33b of the first conveyance path 33. A well-known media sensor can be used as the thickness detection sensor 72. The detection result of the thickness detection sensor 72 is transmitted to the reading device control unit (control unit) 90 that controls the image reading device 10.

  The reading device control unit 90 controls the posture of the switching member 71 according to the thickness of the sheet detected by the thickness detection sensor 72. Specifically, when the thickness of the sheet is 0.24 mm or less, the reading device control unit 90 causes the switching member so that the sheet passes through the automatic reading glass 21a and is discharged to the first discharge tray 34. The posture of 71 is controlled. On the other hand, when the thickness of the sheet is larger than 0.24 mm (when the sheet has a strong stiffness), the reading device control unit 90 passes the sheet through the second transport path 35 and discharges it to the second discharge tray 36. As described above, the attitude of the switching member 71 is controlled.

  It should be noted that the thickness detection sensor 72 may not be provided in order to obtain information regarding the type of sheet. For example, the user inputs the thickness and material of the sheet (information about the type of sheet) on the operation panel (not shown), and the information is transmitted from the main body control unit 8 (see FIG. 1) to the transmission / reception unit (not shown) of the image reading apparatus 10. It may be transmitted to the (acquisition unit). Then, the reading device control unit 90 may control the attitude of the switching member 71 based on the information acquired by the transmission / reception unit. At this time, when the sheet is, for example, a resin card, the reading device control unit 90 sets the posture of the switching member 71 so that the sheet passes through the second transport path 35 and is discharged to the second discharge tray 36. May be controlled.

  Next, a sheet-through type image reading operation using the image reading apparatus 10 will be described. In the sheet-through method, a plurality of sheets are set on the sheet feeding tray 31 with the image side facing upward. After that, when the copy start button on the operation panel (not shown) of the image forming apparatus 100 is turned on, the lift plate (not shown) is lifted by the lifting mechanism (not shown), and the sheet is pressed against the pickup roller 41. To be done.

  The sheets set in the sheet feeding tray 31 are normally sent by the pickup roller 41 to the nip portion between the sheet feeding belt 42 and the separation roller 43. Then, only the uppermost one of the plurality of sheets is separated by the separation roller 43 and is conveyed toward the registration roller pair 44. Then, the thickness of the sheet passing through the registration roller pair 44 is detected by the thickness detection sensor 72.

  When the thickness of the sheet is, for example, 0.24 mm or less, the switching member 71 is arranged at the position shown in FIG. 3, and the sheet is conveyed toward the automatic reading glass 21a. Then, the image on the front surface (second surface) of the sheet is read by the front surface reading module 25 through the automatic reading glass 21a. After that, the sheet that has passed the automatic reading glass 21 a is discharged to the first discharge tray 34 by the first discharge roller pair 47.

  When the thickness of the sheet is larger than 0.24 mm (or when the sheet is a resin card, for example), the switching member 71 is arranged at the position shown in FIG. It is transported toward. Then, the image on the front surface (second surface) of the sheet is read by the second reading unit 53. After that, the sheet that has passed the second reading unit 53 is discharged to the second discharge tray 36 by the second discharge roller pair 49.

  In the case of reading both sides of the sheet, after the first reading unit 51 reads the image on the back side (first side) of the sheet, the switching member 71 switches the discharge destination of the sheet (sheet conveying direction).

  Next, a detailed structure around the first reading unit 51 and the second reading unit 53 will be described.

  As shown in FIG. 3, a first contact glass 81, which constitutes a part of the lower transport surface of the first transport path 33, is provided above the first reading unit 51. The first reading unit 51 is pressed against the first contact glass 81 by the first biasing member 82. Therefore, the distance from the first reading unit 51 to the upper surface of the first contact glass 81, that is, the distance from the first reading unit 51 to the lower surface (first surface) of the sheet is constant.

  In addition, a first adjusting unit 83 that adjusts a gap between the first reading unit 51 and the first transport roller 61 is provided around the first reading unit 51. The 1st adjustment part 83 is comprised by the drive motor, a worm gear, or an eccentric cam, etc., for example. The first adjusting unit 83 moves the first transport roller 61 in the vertical direction according to the thickness of the sheet detected by the thickness detection sensor 72 (or the information acquired by the transmitting / receiving unit), and thereby the first reading unit 51 and The gap with the first transport roller 61 is adjusted.

  Specifically, when the thickness of the sheet is about the same as thin paper or plain paper, the first transport roller 61 is arranged so as to contact the first contact glass 81. As the thickness of the sheet increases, the first transport roller 61 moves upward. When the thickness of the sheet is larger than 0.24 mm, for example, the first transport roller 61 is arranged at a predetermined distance from the first contact glass 81, as shown in FIG.

  Below the second reading unit 53, a second contact glass 85 that constitutes a part of the upper transport surface of the second transport path 35 is provided. The second reading unit 53 is pressed against the second contact glass 85 by the second biasing member 86. Therefore, the distance from the second reading unit 53 to the lower surface of the second contact glass 85 is constant.

  In addition, a second adjusting unit 87 that adjusts the gap between the second reading unit 53 and the second transport roller 63 is provided around the second reading unit 53. The second adjusting unit 87 is configured by, for example, a drive motor, a worm gear or an eccentric cam, and the like. The second adjusting unit 87 moves the second reading unit 53 and the second contact glass 85 in the vertical direction according to the sheet thickness detected by the thickness detection sensor 72 (or the information acquired by the transmitting / receiving unit). The gap between the second reading unit 53 and the second transport roller 63 is adjusted.

  Specifically, the second reading unit 53 and the second contact glass 85 are moved upward as the thickness of the sheet increases. In the present embodiment, thin paper or plain paper is not transported to the second transport path 35, so the second contact glass 85 is always arranged at a predetermined distance from the second transport roller 63.

  The second adjusting unit 87 may be configured to adjust the gap between the second reading unit 53 and the second transport roller 63 by moving the second transport roller 63 in the vertical direction.

  In the present embodiment, the reading device control unit 90 reads the image of the sheet placed on the sheet feeding tray 31 and discharges the sheet to the first discharge tray 34 or the second discharge tray 36 as described above. It is possible to execute the mode and the sheet feeding mode in which the sheet placed on the sheet feeding tray 31 is passed through the first transport path 33 and the second transport path 35 and discharged to the second discharge tray 36.

  When executing the sheet feeding mode, the user sets the plurality of sheets discharged to the second discharge tray 36 in the image reading mode on the sheet feeding tray 31 again. After that, when the sheet feeding mode start button on the operation panel (not shown) of the image forming apparatus 100 is turned on, the sheet feeding mode is executed, and the sheets set in the sheet feeding tray 31 are conveyed one by one. To be done.

  The sheet is conveyed toward the second conveyance path 35 by the switching member 71, and is discharged one by one to the second discharge tray 36. The sheet conveying speed in the sheet feeding mode is faster than the sheet conveying speed in the image reading mode. Further, in the sheet feeding mode, the sheet thickness detection and the image reading are not performed.

  In the present embodiment, as described above, the second conveyance path 35 branching from the branch portion 33b on the upstream side in the sheet conveyance direction with respect to the curved portion 33a of the first conveyance path 33 and the branch portion 33b are disposed, and A switching member 71 that switches the discharge destination to the first discharge tray 34 and the second discharge tray 36, and a reading device control unit 90 that switches the posture of the switching member 71 according to the information acquired by the thickness detection sensor 72 are provided. As a result, for example, in the case of a sheet such as plain paper, after the image of the sheet is read by the front surface reading module 25 (or both the front surface reading module 25 and the first reading unit 51), the sheet is discharged into the first discharge tray. When the sheet is discharged to the sheet 34 and has a strong elasticity, such as a resin card or thick paper, the image of the sheet is read by the second reading unit 53 (or both the second reading unit 53 and the first reading unit 51). After that, the sheet can be discharged to the second discharge tray 36. That is, for example, in the case of a sheet of plain paper or the like, the image of the sheet is read by passing the sheet through the curved portion 33a of the first transport path 33, while in the case of a sheet of high resilience such as a resin card or cardboard, the sheet is read. The image on the sheet can be read without passing through the curved portion 33a of the first transport path 33. As described above, even in the case of a strong sheet, it is possible to read the image of the sheet without causing sheet conveyance failure.

  Further, as described above, the thickness detection sensor 72 is used as an acquisition unit that acquires information regarding the type of sheet. Thereby, the discharge destination of the sheet can be switched according to the thickness of the sheet.

  Further, as described above, the first adjusting unit 83 that adjusts the gap between the first reading unit 51 and the first transport roller 61 according to the information acquired by the thickness detection sensor 72 is provided. As a result, it is possible to prevent the sheet from being caught by the first reading unit 51 or the first transport roller 61 and causing a defective sheet transport.

  Further, as described above, the first adjusting unit 83 adjusts the gap between the first reading unit 51 and the first transport roller 61 by moving the first transport roller 61 in the vertical direction. This makes it possible to adjust the gap between the first reading unit 51 and the first transport roller 61 while appropriately maintaining the distance from the first reading unit 51 to the first surface of the sheet.

  In addition, as described above, the second adjusting unit 87 that adjusts the gap between the second reading unit 53 and the second transport roller 63 according to the information acquired by the thickness detection sensor 72 is provided. As a result, it is possible to prevent the sheet from being caught by the second reading unit 53 or the second transport roller 63 and causing defective sheet transport.

  Further, as described above, the second adjusting unit 87 adjusts the gap between the second reading unit 53 and the second transport roller 63 by moving the second reading unit 53 in the vertical direction. This makes it possible to adjust the gap between the second reading unit 53 and the second transport roller 63 while appropriately maintaining the distance from the second reading unit 53 to the second surface of the sheet.

  Further, as described above, the image reading mode in which the image of the sheet placed on the sheet feed tray 31 is read and the sheet is discharged to the first discharge tray 34 or the second discharge tray 36, and It is possible to execute a sheet feeding mode in which the placed sheet is passed through the first transport path 33 and the second transport path 35 and discharged to the second discharge tray 36. In the image reading mode, for example, when reading an image of a strong sheet such as a resin card or thick paper, the sheet bundle placed on the sheet feeding tray 31 is fed one by one from the uppermost layer, and the first conveyance path 33 and After passing through the second transport path 35 and discharging to the second discharge tray 36, the order of the pages of the sheet bundle discharged to the second discharge tray 36 is the order of the pages of the sheet stack placed on the sheet feeding tray 31. The order is different. Therefore, when the user places the sheet bundle discharged to the second discharge tray 36 again on the sheet feeding tray 31 and executes the sheet feeding mode, the pages of the sheet bundle discharged to the second discharge tray 36 are printed. The order of can be returned to the original order.

  Further, as described above, the sheet transport speed in the sheet transport mode is faster than the sheet transport speed in the image reading mode. As a result, the sheet feeding mode can be completed in a short time.

  It should be noted that the embodiment disclosed this time is an example in all respects and is not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  For example, in the above-described embodiment, the image reading apparatus of the present invention has been described by taking an image reading apparatus mounted in the image forming apparatus as an example, but it is also applicable to an image scanner or the like used separately from the image forming apparatus. Is.

  Further, in the above-described embodiment, an example in which the first reading unit 51 and the second reading unit 53 are configured by a contact image sensor and the front surface reading module (third reading unit) 25 is configured by a CCD sensor has been described. The invention is not limited to this. For example, the front surface reading module 25 may be configured using a contact image sensor or another reading component.

10 image reading device 25 surface reading module (third reading unit)
31 sheet feed tray (supply tray)
33 1st conveyance path 33a Curved part 33b Bifurcation part 34 1st discharge tray 35 2nd conveyance path 36 2nd discharge tray 51 1st reading part 53 2nd reading part 61 1st conveyance roller 63 2nd conveyance roller 71 Switching member 72 Thickness detection sensor (acquisition unit)
83 first adjusting unit 87 second adjusting unit 90 reader control unit (control unit)
100 image forming apparatus

Claims (8)

A supply tray on which sheets are stacked,
A sheet that is sent out from the supply tray and that has a first conveyance path that has a curved portion having a substantially C-shaped cross section along the sheet conveyance direction;
A second transport path branched from a branch portion on the upstream side in the sheet transport direction with respect to the curved portion of the first transport path;
A first discharge tray that is connected to the downstream side of the first transport path in the sheet transport direction and discharges the sheet that has passed through the first transport path;
A second discharge tray that is connected to the downstream side of the second transport path in the sheet transport direction and discharges the sheet that has passed through the second transport path;
A first reading unit which is arranged on the upstream side in the sheet transport direction with respect to the branching portion of the first transport path and which reads an image of a first surface of a sheet passing through the first transport path;
A second reading unit that is arranged in the second transport path and reads an image on the second surface of the sheet passing through the second transport path;
A third reading unit which is arranged on the downstream side in the sheet conveying direction with respect to the branch portion of the first conveying path and which reads an image on the second surface of the sheet;
An acquisition unit that acquires information about the type of sheet,
A switching member that is disposed at the branching portion and that switches a sheet discharge destination between the first discharge tray and the second discharge tray;
A control unit that switches the posture of the switching member according to the information acquired by the acquisition unit;
Equipped with
The control unit reads an image of a sheet placed on the supply tray and ejects the sheet to the first discharge tray or the second discharge tray, and an image reading mode for detecting the sheet placed on the supply tray. image reading apparatus according to claim executable der Rukoto and a sheet Okudori mode for discharging the second discharge tray by passing through the first conveying path and the second conveying path.   The image reading apparatus according to claim 1, wherein the acquisition unit is a thickness detection sensor that is disposed on the upstream side in the sheet conveying direction with respect to the branching unit and that detects the thickness of the sheet. A first transport roller that is disposed to face the first reading unit across the first transport path and transports a sheet;
A first adjusting unit that adjusts a gap between the first reading unit and the first transport roller according to the information acquired by the acquiring unit;
The image reading apparatus according to claim 1, further comprising: The first reading unit is disposed below the first transport path,
The first transport roller is arranged above the first transport path,
The image according to claim 3, wherein the first adjusting unit adjusts the gap between the first reading unit and the first conveying roller by moving the first conveying roller in the vertical direction. Reader. A second transport roller that is disposed to face the second reading unit across the second transport path and transports a sheet;
A second adjusting unit that adjusts the gap between the second reading unit and the second transport roller according to the information acquired by the acquiring unit;
The image reading apparatus according to claim 1, further comprising: The second reading unit is disposed above the second transport path,
The second transport roller is disposed below the second transport path,
The image according to claim 5, wherein the second adjusting unit adjusts the gap between the second reading unit and the second transport roller by moving the second reading unit in the vertical direction. Reader. The sheet conveying speed in the sheet Okudori mode, the image reading apparatus according to any one of claims 1 to 6, wherein the higher than the sheet conveying speed in the image reading mode. An image forming apparatus comprising the image reading apparatus according to any one of claims 1-7.

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