JP2007217178A - Automatic document feeding device, image reading device, and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reading device provided with an automatic document feeding device capable of easily removing a document causing jamming and having a high rate of operation and to provide an image forming device provided with these devices in a device body. <P>SOLUTION: This automatic document feeding device 3 lets an image sensor read a face on one side of a document while the document is conveyed from a document tray onto a document delivery tray on a conveyance path on the upstream side. The document finished reading of the face on one side is conveyed from the document delivery tray onto the upstream side of the image sensor on an inversion guide path to let the image sensor read a face on the other side. This automatic document feeding device 3 is provided with an opening and closing guide 15 for opening and closing the upstream side conveyance path and a separation document tray 25 integrated with the document tray to open and close the inversion guide path 28 and a pair of paper delivery rollers 18. The directions of opening and closing of the opening and closing guide 15 and the separation document tray 25 are the same. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automatic document feeder that can easily remove jammed originals, an image reading apparatus that includes the automatic document feeder, and an image forming apparatus that includes these in an apparatus main body.

  2. Description of the Related Art Conventionally, an image forming apparatus that forms an image on a sheet includes an image reading device that reads an original on an upper portion of the apparatus main body. In this case, the image reading apparatus may include an automatic document feeder that can be freely opened and closed on the upper portion thereof, and may read a document automatically fed from the automatic document feeder (patent) Reference 1).

  Therefore, the image forming apparatus is configured to copy the document on the sheet based on the document reading information obtained by reading the document automatically fed by the automatic document feeder. Examples of the image forming apparatus include a printer, a FAX, a copying machine, and a multifunction machine of these.

  A conventional automatic document feeder (hereinafter referred to as “ADF”; ADF: Auto Document Feeder) 103 will be described with reference to FIGS.

  In FIG. 13 and FIG. 14, the document bundle Da stacked on the document tray 108 of the automatic document feeder 103 is separated from the separation pad 111 pressed by the pressing spring 110 in the ADF 103 by the lowered pickup roller 109. It is fed between the rollers 112. The separation pad 111 and the separation roller 112 convey documents one by one. The document is conveyed while being guided along the upstream conveyance path 127. The upstream conveyance path 127 is formed from the pickup roller 109 to the flow reading glass 106. The upstream conveyance path 127 is formed by the upper surface of the separation guide 114, the guide frame 126, and the lower surface 115 b of the open / close guide 115 facing these.

  Thereafter, the conveyance roller pair 116 feeds the document D to the reading position 107 a of the flow reading glass 106 of the image reading apparatus 102. The document D is read by an image sensor (not shown) while being transported to the transport roller pair 116 and 117. Then, the document D is guided to the downstream conveyance path 129 and discharged to the document discharge tray 119 by the discharge roller pair 118. As shown in FIG. 15, the user lifts the front end 108b of the document tray 108, rotates the document tray 108 around the rotation fulcrum 108a, and opens the document discharge tray 119 to take out the document. FIG. 16 is an external perspective view of the automatic document feeder in which the document is removed and the document tray 108 is returned to the original position.

  In order to read a document on which images are recorded on both sides, the discharge roller pair 118 reverses in a state where the rear end portion of the document D is held between the discharge roller pair 118, and the document is transferred to the transport roller pair 113. Transport switchback. The document is switched back on the switchback transport path 128. The switchback transport path 128 is formed by a gap between the lower surface 114 c of the separation guide 114 and the transport guide 120.

  Thereafter, the conveyance roller pair 116 flows the document D and sends it to the reading glass 106. At this time, since the document D has been switched back and conveyed, it is turned upside down and sent to the flow reading glass 106, and the back surface thereof is read by the image sensor. Finally, the document D is discharged to the document discharge tray 119 by the discharge roller pair 118.

  Note that, as described above, an operation of reading an image of a document by passing the document over a stopped image sensor is generally referred to as “flow-reading”.

  Here, a procedure for removing the document D jammed in the ADF 103 will be described with reference to FIGS.

  It is generally called “jamming” for a document jammed in the ADF 103 and “jam processing” for removing the jammed document by the user during the flow reading.

  The open / close guide 115 is locked by the lock mechanism 123 of FIG. First, the latch lever 123a of the lock mechanism 123 in the opening / closing guide 115 is pulled in the left direction (arrow A direction) in FIG. 16 to remove the latch lever 123a from a fixing pin (not shown). 17 and 18, the open / close guide 115 is rotated leftward (arrow B direction) around the rotation fulcrum 115a to open the upstream conveyance path 127.

  Next, when the open / close guide 115 is opened, the exposed guide part 114b of the separation guide 114 is held, and the separation guide 114 is opened rightward (arrow C arrow) around the rotation fulcrum 114a. The rotation fulcrum 114a is also used as the discharge roller shaft 118c of the discharge roller 118.

  Finally, the user inserts his / her hand through the opening 121 generated by opening the opening / closing guide 115 and the separation guide 114. Then, the user grasps the end of the jam original D, manually rotates the jam processing lever 122 shown in FIGS. 17 and 21, and takes out the original D in the direction of arrow E while manually conveying the original D. When the jam processing lever 122 is rotated, the idler gear 122a is rotated via the reduction gear 122b, and the conveying roller pair 116, 117 is rotated, so that the jammed document sandwiched between the conveying roller pair 116, 117 can be taken out. it can.

JP 2002-226071 A

  However, the conventional ADF has the following problems because a jam original is taken out from the opening 121 formed by opening and closing the guide 115 and the separation guide 114 so-called double doors.

  Since the distance between the openings 121 is narrow, it is difficult for the user to put in his hand when taking out the document.

  When taking out a document from the opening 121, the edge of the document may be caught on the separation guide 114, the opening / closing guide 115, etc., and the document D may be scratched or torn. It was difficult to handle the jam.

  During the jam processing, the jam processing lever 122 and the end portion of the document D picked up by the user are aligned in a straight line in the front-rear direction as viewed from the user, and thus the jam processing lever 22 must be operated with both hands approaching each other. . For this reason, it was difficult to perform jam processing.

  Even if the opening / closing guide 115 and the separation guide 114 are opened, the nip of the discharge roller pair 118 cannot be opened. Therefore, care must be taken to remove the jammed document sandwiched between the discharge roller pair 118, and the jam processing is performed. It was hard to do.

  Since the operation of opening the opening / closing guide 115 and the operation of opening the separation guide 114 are performed twice, it takes time to open the opening / closing guide 115 and the separation guide 114.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic document feeder that can easily perform jam processing and increase the operating rate.

  An object of the present invention is to provide an image reading apparatus and an image forming apparatus provided with an automatic document feeder having a high operating rate.

  In the automatic document feeder of the present invention, the document reading unit reads one side of the document while the document is being conveyed from the document stacking unit to the document discharge unit by the document guide path, and the one surface has been read. The original is transported from the original discharge means to the upstream side of the original reading means by a reverse guide path so that the original reading means reads the other side of the original, and opens and closes the original guide path. A first opening and closing member; and a second opening and closing member that is integrated with the document stacking unit and opens and closes the reversing guide path and the document discharge unit. The first opening and closing member and the second opening and closing member The opening / closing direction is the same.

  An image reading apparatus according to the present invention includes document reading means for reading a document supplied by an automatic document feeder, and the automatic document feeder is the automatic document feeder.

  The image forming apparatus of the present invention includes an image forming unit that forms an image of the original on a sheet based on reading information of the original read by the image reading apparatus, and the image reading apparatus is the image reading apparatus described above. It is characterized by that.

  In the automatic document feeder of the present invention, the opening / closing direction of the first opening / closing member that opens and closes the document guide path and the second opening / closing member that is integrated with the document stacking unit and opens and closes the reverse guide path and the document discharge unit are Since they are the same, the opening for taking out the jammed document can be made wider than before.

  For this reason, the automatic document feeder of the present invention allows the user to easily perform jam processing.

  Further, since the opening is wide, the jam original can be quickly taken out without damaging the jam original or tearing the jam original.

  Furthermore, since the document discharge means can be opened simultaneously with the reverse guide path, not only the jam original in the reverse guide path but also the jam original sandwiched between the document discharge means can be easily removed.

  Further, since the jam processing can be easily performed, the operation rate of the automatic document feeder is increased.

  Since the image reading apparatus of the present invention includes an automatic document feeder having a high operating rate, the operating rate can be increased.

  Since the image forming apparatus of the present invention includes the image reading apparatus having a high operating rate, the operating rate can be increased.

  Hereinafter, an automatic document feeder, an image reading apparatus, and an image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings.

(Image forming device)
In FIG. 1, an image forming apparatus 1 that forms an image on a sheet includes an image reading apparatus 2 that reads an original D on the upper part of an apparatus main body 1A. The image reading device 2 is provided with an automatic document feeder 3 at the top thereof so as to be freely opened and closed, and reads a document automatically fed from the automatic document feeder 3.

  Therefore, the image forming apparatus 1 copies the document on the sheet P based on the document reading information obtained by the image reading device 2 reading the document automatically fed by the automatic document feeding device 3. Yes. Note that the image forming apparatus 1 includes a printer, a FAX, a copying machine, and a complex machine of these.

  Image information of the document D read by the image reading device 2 is formed as an electrostatic latent image on the photosensitive drum 53 by the laser beam scanner 52 via the controller 5. The surface of the photosensitive drum 53 is uniformly charged by a primary charger 54 in advance before an electrostatic latent image is formed. The electrostatic latent image on the photosensitive drum 53 is developed by the developer 55 with toner as a developer.

  On the other hand, the sheet supply roller 56 sends out the sheets P stacked on the middle plate 58 of the sheet supply cassette 57 from the sheet supply cassette 57. The conveyance roller pair 59 feeds the sheet to the registration roller pair 60. The registration roller pair 60 receives the sheet in a state where the rotation is stopped, causes the sheet to bend, and straightens the skew of the sheet.

  The registration roller pair 60 sends the sheet between the photosensitive drum 53 and the transfer device 61 with the leading edge of the skewed sheet aligned with the toner image on the photosensitive drum 53. The transfer device 61 transfers the toner image onto the sheet. Thereafter, the conveyance belt 62 feeds the sheet to the fixing device 63. The fixing device 63 heats and presses the sheet, fixes the toner image on the sheet, and discharges it to the discharge tray 64. The toner remaining on the photosensitive drum 53 is removed by the cleaner 65.

  In the above configuration, the photosensitive drum 53, the primary charger 54, the developing unit 55, and the like constitute an image forming unit 66.

(Automatic document feeder, image reader)
In FIG. 2, an automatic document feeder (hereinafter referred to as “ADF”; ADF: Auto Document Feeder) 3 separates and feeds documents one by one on the flow reading glass 6. The image reading device 2 can read the document D passing on the flow reading glass 6 by stopping the image sensor 7 below the flow reading glass 6. This way of reading a manuscript is generally called “reading”. The image reading apparatus 2 can also read the document D placed on the contact glass 4 by moving the image sensor 7 under the contact glass 4. This reading is generally called "fixed reading".

  When the image reading device 2 reads and reads a document, the document jammed in the ADF 3 is generally called a “jam document”. The operation of removing a jam original by a user is called “jam processing”.

  The automatic document feeder 3 according to this embodiment can easily perform jam processing.

  The operation of the ADF 3 will be described with reference to FIGS.

  A bundle of documents Da stacked in a bundle on the document tray 8 of the ADF 3 is fed into the ADF 3 by a pickup roller 9 that is lowered.

  The document D fed from the pickup roller 9 into the ADF 3 is caused to enter between the separation pad 11 and the separation roller 12 pressed by the pressing spring 10. When only one document D is sent to the ADF 3, the separation roller 12 sends the document to the conveyance roller pair 13. If the original D is fed in an overlapping manner, the lower original D overlapping the uppermost original D is prevented from being conveyed by the separation pad 11, and only the uppermost original is separated by the separation roller 12. It is sent to the conveyance roller pair 13.

  The document is transported while being guided along, for example, the upstream transport path 27 which is a document guide path. The upstream conveyance path 27 is formed from the pickup roller 9 to the flow-reading glass 6. The upstream conveyance path 27 is formed by the upper surface of the separation guide 14, the guide frame 26, and a lower surface 15 b of the opening / closing guide 15, for example, which is a first opening / closing member facing the separation frame 14. The document tray 8 and the separation guide 14 are integrated to form a separation document tray 25 as will be described later.

  Thereafter, the conveyance roller pair 16 feeds the document D to the reading position 7 a of the flow reading glass 6 of the image reading device 2. The document D is read by an image sensor 7 serving as a document reading unit shown in FIG. Thereafter, the document D is picked up by the jump table 30 and guided to the downstream conveyance path 29. The downstream conveyance path 29 is a portion from the jump stand 30 to the paper discharge roller pair 18.

  The downstream transport path 29 is connected to a switchback transport path 28 to be described later. A flapper 31 is provided at the connecting portion. The document is conveyed to the conveyance roller pair 17, pushes the downstream end of the flapper 31 away, and is discharged to the document discharge tray 19 by the discharge roller pair 18.

  To record an image on both sides of the document and read both sides, the paper discharge roller pair 18 is reversed with the rear end of the document D being sandwiched, and the document is switched back and conveyed to the conveyance roller pair 13. The switchback conveyance path 28 is formed by a gap between the lower surface 14 c of the separation guide 14 that is a part of the separation document tray 25 and the conveyance guide 20. The document is guided to the flapper 31 and is switched back and conveyed to the switchback conveyance path 28.

  Thereafter, the conveyance roller pair 16 flows the document D and feeds it into the reading glass 6. At this time, since the document D has been switched back and conveyed, it is turned upside down and sent to the flow reading glass 6, and the back surface thereof is read by the image sensor 7. Finally, the paper discharge roller pair 18 discharges the document to the document discharge tray 19.

  Next, a configuration related to jam processing will be described.

  The cause of the occurrence of a jammed document is that the document is curled or folded in the middle of conveyance and is caught in the conveyance paths 27, 28, 29, or the power is inadvertently turned off during the operation of the ADF 3. There is a malfunction etc. when ADF3 is restarted.

  The opening / closing guide 15 can open and close the upstream conveyance path 27 around a rotation fulcrum 15a provided in the apparatus main body 2A.

  The open / close guide 15 is held in a closed state by, for example, a lock mechanism 23 which is a lock means shown in FIGS. A latch shaft 23 b of the lock mechanism 23 is rotatably provided on the open / close guide 15. The latch shaft 23b, the latch lever 23a operated by the user, the hook 23c, and the spring hook 23d are integrally formed. A latch spring 23e is stretched between the spring hook 23d and the opening / closing guide 15. The latch spring 23e pulls the spring hook 23d in a direction in which the hook 23c is always engaged with the fixing pin 24. The fixing pin 24 protrudes inside the apparatus main body 3A of the automatic document feeder 3.

  When a jammed document is generated in the upstream transport path 27 during the operation of the automatic document feeder 3 and the jam handling is performed, it is necessary to open the open / close guide 15 and open the upstream transport path 27. Therefore, the user rotates the latch lever 23a of the lock mechanism 23 in the direction of arrow E shown in FIG. 9 against the latch spring 23e. Then, as shown in FIG. 10, the hook 23 c integrated with the latch lever 23 a rotates in the direction of arrow F via the latch shaft 23 b and is detached from the fixing pin 24.

  As a result, the locked state of the open / close guide 15 is released. As shown in FIG. 6, the open / close guide 15 is rotated in the direction of arrow J about the rotation fulcrum 15a to open the upstream conveyance path 27. be able to. When the upstream conveyance path 27 is opened, the nip of the conveyance roller pair 13 is opened, and the separation roller 12 is separated from the separation pad 11. Therefore, the jammed document jammed in the upstream conveyance path 27 can be easily removed.

  To close the upstream conveyance path 27, when the hand is released from the opening / closing guide 15, the opening / closing guide 15 falls to the right side from the state shown in FIG. Then, the hook 23 c comes into contact with the fixing pin 24, rotates against the latch spring 23 e, and engages with the fixing pin 24. As a result, the open / close guide 15 is held in a locked state. As a result, a nip is formed in the conveying roller pair 13, and the separation roller 12 comes into contact with the separation pad 11 so that each part returns to the original state.

  Next, the separation document tray 25, which is a second opening / closing member formed by integrating the separation guide 14 and the document stacking unit, for example, the document tray 8, will be described. As shown in FIGS. 3 to 6, the separation document tray 25 is provided on the main body 3A of the ADF 3, for example, a switchback conveyance path 28 that is a reverse guide path by a rotation fulcrum 25a, and a discharge roller pair 18 that is a document discharge means. The nip is provided to open and close. The driving roller 18 a of the discharge roller pair 18 is supported by the apparatus main body 3 A, and the driven roller 18 b is rotatably provided on the back surface of the separation document tray 25. The rotation fulcrum 25 a of the separation document tray 25 and the rotation fulcrum 15 a of the open / close guide 15 are disposed close to each other outside the upstream conveyance path 27.

  When jam processing is performed when jammed documents are generated in the transport roller pairs 16 and 17, the downstream transport path 29, the discharge roller pair 18, and the switchback transport path 28 during operation of the automatic document feeder 3, FIG. 6, first, the open / close guide 15 is rotated in the arrow J direction.

  Thereafter, the separation document tray 25 is rotated in the arrow K direction around the rotation fulcrum 25a. Then, the nip of the discharge roller pair 18 is released, and the switchback conveyance path 28 is opened. Therefore, the jammed original jammed in the discharge roller pair 18 and the switchback conveyance path 28 can be easily removed.

  Further, when the separation document tray 25 is rotated in the arrow K direction, the jam processing lever 22 is exposed. When the jam handling lever 22 is manually rotated, the idle gear 22a, the reduction gear 22b, the idler gears 22c and 22d, and the driven gear 22e are rotated. Then, one roller of the conveyance roller pair 17 is forcibly rotated by the reduction gear 22b, and one roller of the conveyance roller pair 16 is forcibly rotated by the driven gear 22e. However, jammed originals jammed in the transport roller pair 16 and 17 and the downstream transport path 29 are sandwiched between the transport roller pair 16 and 17. However, the jam original is pulled out of the transport roller pair 16 and 17 and the downstream transport path 29 without being torn by the rotation of the transport roller pair 16 and 17 and the pulling in the arrow E direction by the user.

  The jam processing lever 22 has a reduction gear ratio at the time of rotation by the reduction gear 22b so that the user can rotate the jam processing lever 22 with a light force. Further, the outer peripheral surface of the jam processing lever 22 is provided with irregularities so that the user's finger is easily caught and the jam processing lever 22 is easily rotated.

  As described above, in the automatic document feeder 3, the rotation fulcrum 15a of the open / close guide 15 and the rotation fulcrum 25a of the separation document tray 25 are disposed close to each other outside the upstream conveyance path 27. The open / close guide and the separation document tray can be opened in the same direction.

  As a result, the automatic document feeder 3 of the present embodiment has the following features.

  The opening 21 can be opened wider than before, and it is easy for the user to put his / her hand when taking out the original, and the jam original can be easily pulled out while the jam processing lever 22 is rotated.

  The widening of the opening 21 and the ease of pulling out the jammed document allow the user to perform jam processing without damaging the document D or tearing the document D.

  When the separation document tray 25 is opened, the driven roller 18b of the paper discharge roller pair 18 can be separated from the driving roller 18a, and the nip of the paper discharge roller pair 18 can be opened at the same time. Jam processing of jammed jam documents can be performed easily.

  Since the user can easily perform the jam processing without damaging the jam original, the operation efficiency can be improved.

  Conventionally, the separation pad 11 and the document tray 8, which are separate bodies, are integrated into a separation document tray 25. Therefore, the number of parts and the rotational fulcrum for rotation support can be reduced, and the structure can be reduced. Can be simple.

  FIG. 11 is a diagram showing a configuration in which the separation document tray 25 and the open / close guide 15 can be rotated together. As shown in FIG. 11, a protrusion 32 protrudes upward at a position of the separation document tray 25 facing the lower surface of the open / close guide 15.

  When the projection 32 is provided, the separation document tray 25 is disposed below the opening / closing guide 15. Therefore, when the separation document tray 25 is rotated, the projection 32 pushes up the opening / closing guide 15 and opens / closes with the separation document tray 25. It can be rotated together with the guide 15.

  Therefore, when the separation document tray 25 is opened, the opening / closing guide 15 can also be opened. Conventionally, the opening / closing guide and the separation guide can be separately opened twice, but can be opened once. The jam handling operation can be simplified.

  Depending on the shape of the separation document tray 25 and the opening / closing guide 15, the separation document tray 25 may be brought into contact with the opening / closing guide 15 when the separation document tray 25 is rotated without providing the protrusion 32.

  As shown in FIG. 11, even if the separation document tray 25 and the opening / closing guide 15 can be integrally opened by the protrusion 32, the opening operation is performed after the locking of the opening / closing guide 15 by the lock mechanism 23 is released. There must be. Therefore, as shown in FIG. 12, when the separation document tray 25 is rotated, the opening / closing guide 15 can be automatically unlocked, and the jam handling operation can be further simplified.

  That is, in FIG. 12, the hook release lever 23f is formed integrally with the hook portion 23c of the lock mechanism 23 provided in the opening / closing guide 15, and the protrusion 32 of the separation document tray 25 is in contact with the hook release lever 23f. It is.

  In this configuration, when the separation document tray 25 is opened, the protrusion 32 comes into contact with the hook release lever 23f, and the hook portion 23c rotates upward as shown by the dotted line, and comes off from the fixing pin 24. As a result, the opening / closing guide 15 can be rotated, and the user simply rotates the separation document tray 25, and the opening / closing guide 15 and the separation document tray 25 are removed while removing the hook portion 23 c of the lock mechanism 23 of the opening / closing guide 15. Can be lifted at the same time.

  Therefore, the jam handling operation can be performed more easily.

1 is a cross-sectional view of an image forming apparatus including an automatic document feeder and an image reading apparatus in an apparatus body according to an embodiment of the present invention along a sheet conveying direction. It is a detailed sectional view of a reading unit in the image reading apparatus. FIG. 2 is a cross-sectional view of the automatic document feeder of FIG. 1 along the document conveyance direction. FIG. 3 is a diagram illustrating an automatic document feeder that switches back and conveys a document. 2 is an external perspective view of a separation document tray. FIG. FIG. 4 is a diagram illustrating a state where an open / close guide and a separation document tray in the automatic document feeder of FIG. 3 are opened. FIG. 6 is a view showing a state where an open / close guide and a separation document tray are opened in order to remove a jammed document jammed in a downstream conveyance path. FIG. 8 is a state diagram after removing a jam original. It is a perspective view of a locking mechanism. It is a fragmentary perspective view of a locking mechanism. FIG. 6 is a view in which an opening / closing guide and a separation document tray can be opened simultaneously. FIG. 12 is a diagram of a lock mechanism when the opening / closing guide and the separation document tray can be opened simultaneously in FIG. 11. FIG. 10 is a cross-sectional view of a conventional automatic document feeder along a document conveyance direction. FIG. 6 is a diagram illustrating a conventional automatic document feeder that performs switchback conveyance of a document. FIG. 10 is an operation explanatory diagram for lifting a document tray and removing a document in a conventional automatic document feeder. It is a figure for operation | movement explanation of a locking mechanism. In the conventional automatic document feeder, the open / close guide and the separation guide are opened. In the conventional automatic document feeder, the opening / closing guide is opened. It is the perspective view which opened the isolation | separation guide from the state of FIG. FIG. 20 is a perspective view in which a jam original is removed from the state of FIG. 19. FIG. 6 is a perspective view of the vicinity of a jam handling lever in a conventional automatic document feeder.

Explanation of symbols

P Sheet D Document 1 Image forming apparatus 1A Image forming apparatus main body 2 Image reading apparatus 3 Automatic document feeder (ADF)
3A apparatus main body 6 flow reading glass 7 image sensor (original reading means)
7a Reading position 8 Document tray (document stacking means)
8a Rotation fulcrum 9 Pickup roller 14 Separation guide 15 Opening / closing guide (first opening / closing member)
15a Rotation fulcrum 16 Conveying roller pair 17 Conveying roller pair 18 Discharge roller pair (original discharge means)
20 Transport Guide 21 Opening 22 Jam Processing Lever 23 Lock Mechanism (Locking Unit)
23a Latch lever 23b Latch shaft 23c Hook 23d Spring hook 23e Latch spring 23f Hook release lever 24 Fixing pin 25 Separating document tray (second opening / closing member)
25a Rotation fulcrum 27 Upstream transport path (original guide path)
28 Switchback transport path (reverse guide path)
29 Downstream transport path 32 Protrusion 66 Image forming section

Claims (5)

While the original is transported from the original stacking means to the original discharge means by the original guide path, one side of the original is read by the original reading means, and the original after the one side has been read is read from the original discharge means to the original. In an automatic document feeder in which the document is read by the reverse guide path to the upstream side of the reading unit and the other side of the document is read by the document reading unit,
A first opening / closing member for opening / closing the document guide path;
A second opening / closing member that is integrated with the document stacking means and opens and closes the reverse guide path and the document discharge means;
The opening and closing directions of the first opening and closing member and the second opening and closing member are the same.
An automatic document feeder characterized by that. The second opening / closing member is disposed below the first opening / closing member, and the second opening / closing member pushes up the first opening / closing member by an opening operation and can be opened simultaneously with the first opening / closing member.
The automatic document feeder according to claim 1. A locking means for locking the first opening / closing member in a closed state;
The locked state of the locking means is released with the opening operation of the second opening / closing member,
The automatic document feeder according to claim 2. A document reading means for reading a document supplied by an automatic document feeder;
The automatic document feeder is the automatic document feeder according to any one of claims 1 to 3.
An image reading apparatus. An image forming unit that forms an image of the original on a sheet based on reading information of the original read by the image reading apparatus;
The image reading apparatus is the image reading apparatus according to claim 4,
An image forming apparatus.

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