JP5666125B2 - Document reader - Google Patents

Description

  The present invention relates to an original reading apparatus that reads an image of an original, and more particularly to an original reading apparatus that includes a mechanism for switching a background color according to the type of original to be read.

  2. Description of the Related Art Conventionally, a device that reads an image of a document passing through a reading unit provided in a conveyance path with a stationary reading unit, a so-called sheet-through type document reading device is known. In such a document reading device, a guide plate provided at a position facing the reading surface (contact glass) is configured by a white member so that the background of the document at the reading position does not affect the document image. There are many cases.

  In such a document reading apparatus using a guide plate made of a white member, when reading a front image of a double-sided document in which images such as characters are recorded on both sides, the image on the back side is also read simultaneously. There is a problem that a so-called show-through occurs, and an accurate image cannot be read. In particular, this show-through was noticeable in the case of a thin document.

  In order to prevent such show-through, a guide plate having two background surfaces of a white member and a black member is provided, and a switching mechanism that switches between the white member and the black member according to the type of document is provided. Several document readers have been proposed.

  For example, in Patent Document 1, a background switching plate having a white region and a black region is provided so as to face the reading surface provided in the image reading unit, and the background switching plate is slid in the horizontal direction by a slide moving mechanism. An original reading apparatus that switches the background to white or black has been proposed. Further, in Patent Document 2, a background switching roller having a white surface and a black surface is provided to face a reading surface (contact glass), and the background switching roller is rotated by a driving mechanism so that the background is white or black. There has been proposed a document reading apparatus which is controlled to be switched.

  In these apparatuses, the background color is switched mainly when acquiring shading correction data. Normally, when reading a single-sided document, a white background plate is opposed to the reading position, and when reading a thin double-sided document, the black background plate is moved so as to face the reading position.

JP-A-8-221559 JP 2003-348301 A

  However, in the case where the background switching plate is slid as in the invention described in Patent Document 1, since the background switching plate is slid in the document transport direction, there is a step on the transport upstream side of the reading position. There is a problem that the read image is distorted when the trailing edge of the document passes through the step. In addition, in the case where the background switching roller is used as in the invention described in Patent Document 2, if the background switching roller is attached to be inclined with respect to the reading line by the reading unit, image unevenness occurs, which is good. There is a problem that a read image cannot be obtained.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an original reading that can obtain an accurate read image without distortion and reading unevenness by easily and surely switching the background color according to the type of the original to be read along the direction of conveyance of the original. Is to provide a device.

In order to solve the above-described problems, an original reading apparatus according to the present invention includes a reading unit having a reading surface for reading an original, a conveying unit that conveys the original with respect to the reading surface, and the reading surface. And a guide unit that guides reading of the document along the reading surface. The guide unit includes at least two flat portions having different background colors formed at an angle, A background switching body that is rotatably provided so that a plane portion faces the reading surface; and a guide holder that rotatably holds the background switching body and guides a document that passes through the reading surface, A guide holder is arranged to be swingable toward the reading surface.

  According to the document reading apparatus of the present invention, the background plate has at least two plane portions having different background colors, and the selected one plane portion is parallel to the reading surface according to the type of the document. Since they can be arranged so as to face each other, it is possible to perform a good reading operation without causing uneven reading or distortion. Further, since the background plate itself is arranged so as to be swingable in a direction orthogonal to the reading surface, switching by rotation of at least two plane portions can be easily and smoothly performed on the reading surface. .

1 is a cross-sectional view illustrating an overall configuration of a document reading apparatus according to the present invention. It is principal part sectional drawing of the conveyance reading unit which comprises the said original reading apparatus. It is sectional drawing which shows the structure of the guide means in the said conveyance reading unit. It is a perspective view centering on the background board of the background switching body which comprises the said guide means. It is a perspective view centering on the support member of the background switching body which comprises the said guide means. It is sectional drawing of the said background switching body. It is sectional drawing of the drive mechanism of the said background switching body. It is explanatory drawing which shows rotation operation | movement of the said background switching body. It is an operation | movement control flowchart of the said background switching body.

  Embodiments of a document reading apparatus according to the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, a document reading apparatus 1 according to the present invention has a main unit 2 having a first image reading unit 4 and a second image reading unit 5 above the main unit 2 so that it can be opened and closed. And a conveyance reading unit 3 to be attached.

  The first image reading unit 4 reads one surface (front surface) of a document passing through the upper surface of the first contact glass 6 which is a first reading surface, and the second image reading unit 5 reads the first surface. The other side (back side) of the document that has passed over the first contact glass 6 is read through the second contact glass 7 as the second reading surface. A third contact glass 8 serving as a third reading surface having a plane space for placing a document is provided on the upper surface of the main unit 2, and the document set on the contact glass 8 is placed on the contact glass 8. The first image reading unit 4 can be read by moving.

  The first image reading unit 4 includes a light source 10 such as a lamp, a plurality of mirrors 11, 12, 13, 14, 15, a lens 16, a photoelectric conversion element 17 such as a CCD, and the like. The document passing over the first image reading unit 4 is irradiated with light emitted from the light source 10 through the first contact glass 6. Then, the light irradiated and reflected on the original surface is reflected several times by the mirrors 11 to 15 and then photoelectrically converted by the photoelectric conversion element 17 through the lens 16 to read the image of the original.

  The third contact glass 8 provided in the main unit 2 is used when a reading operation is performed in a state where a thick document such as a book is fixed, and the third contact glass 8 extends along the lower surface of the third contact glass 8. A document reading process is performed by horizontally moving one image reading unit 4.

  Next, the configuration of the transport reading unit 3 will be described. As shown in FIG. 1, the transport reading unit 3 includes a paper feed tray 20 on which a plurality of documents can be placed, a support tray 21 that raises and lowers the placed documents to a feeding position, and a reading. And a paper discharge tray 22 for storing processed documents.

  Further, the transport reading unit 3 includes a paper feed path 23 that feeds a plurality of documents stacked on the paper feed tray 20 one by one toward the first contact glass 6, and the paper feed path. The relay path 24 extends from the relay path 24 via the first contact glass 6 and the second contact glass 7, and a paper discharge path 25 that extends from the relay path 24 to the paper discharge port of the paper discharge tray 22.

  The paper feed tray 20 is provided with a pair of side guides 26 that regulate both side portions of the placed document. The pair of side guides 26 are connected by an interlocking mechanism using a general rack and pinion, and approach and separate from each other in the width direction with respect to the center reference in the document width direction in the document placement area of the sheet feeding tray 20. The center portion of the document is positioned on the basis of the reference.

  Further, a feeding roller 27 for feeding out the original abutted by raising the support tray 21 on which the original is placed, a paper feeding roller 28 for feeding the fed original, and a pressure contact with the paper feeding roller 28. A separation pad 29 for separating the originals one by one, and a pair of registration rollers 30 that are sent to the downstream side after abutting and aligning the leading ends of the originals that are separated and fed one by one.

  In the relay path 24, a feed roller pair 31 for transporting a document toward the first contact glass 6, a first transport roller pair 32 disposed on the upstream side of the first contact glass 6, A second conveyance roller pair 33 disposed on the downstream side of the first contact glass 6 is provided. In addition, a third conveyance roller pair 34 is provided on the downstream side of the second image reading unit 5, and a paper discharge roller for discharging the paper to the paper discharge tray 22 in the paper discharge path 25 beyond that. A pair 33 is provided.

  Next, details of the second image reading unit 5 will be described. As shown in FIG. 2, the second image reading unit 5 includes a light source 41 such as a lamp for irradiating light to the original conveyed toward the second contact glass 7 and a reflected light from the original. A plurality of mirrors 42, 43, 44 that guide in the direction, a lens 45 that converges the reflected light guided by the plurality of mirrors, and a photoelectric conversion element 46 that photoelectrically converts the light converged by the lens 45. Yes.

  By providing such a second image reading unit 5 on the downstream side of the first image reading unit 4, the surface of the document passing through the first image reading unit 4 is read, and the second image reading unit is read. When passing through the section 5, the back surface can be read continuously. In this way, since the front and back surfaces of the original can be continuously read while the original is conveyed from the paper supply tray 20 toward the paper discharge tray 22, the image reading time of the double-side original is greatly reduced. can do.

  In the document reading apparatus 1 having the above-described structure, there is a problem that an image on the side opposite to the surface of the document is read (show-through) particularly when reading a double-sided document having a thin paper quality. In view of this, in the present embodiment, there is provided a guide means including a background plate that can prevent the show-through of a double-sided document and perform a document conveyance guide more reliably and easily. Hereinafter, this guide means will be described in detail.

  FIG. 3 shows the configuration of the guide means 50 provided facing the second image reading unit 5 in the transport reading unit 3. The guide means 50 includes a background switching body 51 that is rotatably arranged so as to face the second contact glass 7, and a background having two plane portions 52 a and 52 b provided on the rotation surface of the background switching body 51. A plate 52 and a guide holder 55 that holds the background switching body 51 in a rotatable and swingable manner are provided. The background switching body 51 is rotatably supported via a pair of rotating shafts 53a and 53b so that the background plate 52 is exposed in a recess in which one end of the guide holder 55 is recessed. A guide plate 56 for integrally guiding the document that has passed through the second contact glass 7 toward the third transport roller pair 34 is integrally provided on the upper portion of the guide holder 55.

  The guide holder 55 is axially supported by the conveyance reading unit 3 at one end on the downstream side via a rotation pin 57, and is attached to the bottom for biasing the background switching body 51 toward the second contact glass 7 side. A biasing member (biasing spring) 58 is provided between the contact plate 54 and the third contact glass 8. For this reason, the background switching body 51 that rotates integrally with the background plate 52 can swing in the direction of approaching and separating from the second contact glass 7. Reference numeral 59 denotes a flexible film member 59 for guiding the document to the flat portions 52 a and 52 b of the background plate 52. One end of the film member 59 is attached to the guide holder 55, and the downstream side is extended to the upper surfaces of the flat portions 52a and 52b in a free state.

  The background plate 52 is composed of two rectangular flat portions 52a and 52b having a width size orthogonal to the document conveyance direction, and the flat portions 52a and 52b are formed with a predetermined angle. Yes. Further, each of the flat portions 52a and 52b has a different background color. In the present embodiment, planar portions 52a and 52b that are orthogonal to each other are formed by forming or bending a plate material extending in the document width direction into an L-shape, and one planar portion 52a is a white background surface (white The other flat portion 52b is a black background surface (black surface). The background plate 52 is formed of a resin material such as plastic or a metal material, and each background surface is configured by applying white and black paints on the surface or pasting white and black seal materials. .

  Therefore, when reading a single-sided document having an image formed on only one side, the white surface 52a of the background plate 52 is opposed to the second contact glass 7, and a double-sided document having images formed on both sides is read. By switching so that the black surface 52b faces the second contact glass 7, it becomes possible to prevent image reading failure due to document show-through.

  4 and 5 show the structure of the background switching body 51 provided with the background plate 52. FIG. The background switching body 51 is provided with a supporting member 60 that supports the background plate 52 and a pair of side plates 62a, which are provided to face the longitudinal direction of the supporting member 60, and from which the rotation shafts 53a and 53b protrude. 62b.

  The side plates 62a and 62b are integrally formed with four pieces of protrusions 63a to 63d and 64a to 64d having substantially the same height and width at the respective four corners. The protrusions 63a and 64a correspond to both corners in the longitudinal direction of the white surface 52a, and the protrusions 63c and 64c correspond to both corners in the longitudinal direction of the black surface 52b. Further, the protrusions 63b and 64b are provided corresponding to both corners where the white surface 52a and the black surface 52b intersect, and the protrusions 63d and 64d are provided at positions opposite to the protrusions 63b and 64b diagonally. It is done. This protrusion always abuts against the second contact glass 7 as the background switching body 51 rotates, and the document is between the second contact glass 7 and the white surface 52a and the black surface 52b of the background plate 52. A constant gap is maintained for passing through. Further, portions of the side plates 62a and 62b facing the back side of the background plate 52 are arcuate projecting portions 63e and 64e. By providing the overhang portions 63e and 64e, the rotation of the background switching body 51 can be smoothly guided along the inner peripheral surface of the rotation guide portion 61 provided in the guide holder 55.

  The protruding portion is always in contact with the second contact glass 7 by the biasing force of the biasing spring 58 that biases the guide holder 55 from the bottom side, and each plane of the second contact glass 7 and the background plate 52 is provided. The interval between the parts 52a and 52b is kept constant. All the protrusions are set so as to come into contact with the outside of the effective reading area set on the second contact glass 7.

  As shown in FIG. 6, the support member 60 is formed in a substantially L shape so as to face the background plate 52 by a metal plate-like member. The support member 60 has both end portions in the longitudinal direction folded inward, and the pair of rotating shafts 53a and 53b are fixed by caulking to the side surfaces of the bent portions.

  A plurality of bosses 65 and a plurality of tapped screw holes 67 are provided on the inner surface of the background switching body 51, and an engagement hole 66 that engages with the plurality of posts 65 in the support member 60. A plurality of through holes 69 are formed through which a plurality of fixing screws 68 engaged with the screw holes 67 pass. That is, the background plate 52 is positioned by engaging the boss 65 with the engagement hole 66 of the support member 60. Further, the background plate 52 is integrally fixed to the support member 60 by screwing the fixing screw 68 to the screw hole 67 through the through hole 69 provided in the support member 60. In the present embodiment, the boss 65 and the screw hole 67 are provided at three positions, that is, at both ends of the background plate 52 in the document width direction and substantially at the center, and only the tip of the boss 65 is inserted into the engagement hole 66. As shown in FIG. Then, each flat surface of the support member 60 with which the white surface 52a and the black surface 52b of the background plate 52 face each other is screwed with a fixing screw 68 until the stepped step portion contacts the flat surface portion of the support member 60. The portion becomes substantially parallel to hold the background plate 52 formed in an L shape, and deformation such as bending can be corrected.

  As shown in FIG. 7, the background switching body 51 is rotationally controlled by a rotational drive mechanism having a drive motor MT. This rotational drive mechanism is composed of a drive motor MT and a plurality of gears Z1 to Z8 that transmit the rotational force of the drive motor MT to the rotary shafts 53a and 53b of the background switching body 51. Here, the rotation shafts of the first to fourth gears (Z1 to Z4) are rotatably attached to a bracket 70 that supports the drive motor MT, and the rotation shafts of the sixth to eighth gears (Z6 to Z8) are guide holders. It is rotatably attached to 55 support frames 71. The rotation shaft of the fifth gear Z5 is also used as a rotation pin 57 that supports the guide holder 55 so as to be swingable. As described above, by providing the sixth to eighth gears (Z6 to Z8) on the guide holder 55 side, the guide holder 55 rotates about the rotation shaft (rotating pin) 57 of the gear Z5. Therefore, the guide holder 55 can be smoothly swung, and the connection of the gears is not released during this swinging. A detection flag 72 for detecting the home position of the background plate 52 is provided on the rotation shafts of the third gear Z3 and the fourth gear Z4, and the position of the background plate 52 is detected by a position sensor 73.

  Next, the switching operation of the background plate 52 will be described. FIG. 8 is an operation diagram showing the rotation switching operation of the background plate 52, FIG. 9A is a flowchart of the background switching initial operation, and FIG. 9B is a flowchart of the rotation operation of the background plate.

  When the main power supply of the document reading apparatus 1 is turned on, an initial operation is started so that the background switching body 51 is in the rotational position as shown in FIG. In this initial operation, as shown in FIG. 8A, first, it is determined whether or not the position sensor 73 detects (ON) the detection flag 72 (ST10). If not detected, it is determined that the background plate 52 is not at the home position, the drive motor MT is driven forward (ST11), and the background switching body 51 continues to be rotated until the position sensor 73 detects the detection flag 72. (ST12). Then, when the position sensor 73 detects the detection flag 72, the drive motor MT is stopped (ST13). As a result, the background plate 52 is positioned at the home position. Note that the home position of the background plate 52 in the present embodiment is a rotational position in which the white surface 52a of the background plate 52 faces the second contact glass 7 in parallel as shown in FIG. Is set.

  After the initial operation is completed, when a background switching signal indicating whether the background color is to be white or black is received simultaneously with the document feed command signal from the main unit 2 (ST20), it is shown in FIG. 9B. A background switching operation is performed. This background switching operation is executed before the paper feeding operation for feeding the original on the paper feeding tray 20, and if the background switching signal is information indicating a white background, the second contact glass has already been obtained by the above-described insular operation. 7, the white surface 52a of the background plate 52 is positioned (see FIG. 8A), and thus the background switching operation is terminated without being executed. If the background switching signal is information indicating a black background, the drive motor MT is driven to rotate forward (ST21), and the pulse counter starts counting (ST22). By driving the drive motor MT, as shown in FIG. 8B, the background plate 52 is in contact with the second contact glass 7 while the projections 63a and 64a and the projections 63b and 64b are in the direction of the arrows in the figure. Rotate to. At this time, since the distance between the rotation fulcrum (rotating shafts 53a, 53b) of the background plate 52 and the white surface 52a increases toward the L-shaped corner, the holder guide 55 resists the urging force of the urging spring 58. Then, the rotary pin 57 is pushed downward with the fulcrum as a fulcrum. In this way, the background plate 52 is swingable in the direction of approaching and separating from the second contact glass 7 together with the guide holder 55, so that the corner portion as in the present embodiment is L-shaped. The rotating operation of the background plate 52 can be executed smoothly without any trouble.

  Next, when the counter value for counting the drive pulses of the drive motor MT reaches a predetermined set pulse value, the drive motor MT is stopped simultaneously with resetting the counter (ST24 to ST25). As a result, as shown in FIG. 8C, the background plate 52 is rotated by about 90 ° and positioned so that the black surface 52b faces the second contact glass 7 in parallel. Note that a pulse value required for the background plate 52 to rotate 90 ° is preset in the drive motor MT.

  When one of the white surface 52a and the black surface 52b is positioned at a position facing the second contact glass 7 by such background switching operation, the document feeding operation is executed, and as shown in FIG. If the original is a single-sided original, the original is read by the first image reading unit 4 and then discharged to the paper discharge tray 22 as it is. On the other hand, if the document is a double-sided document, the first image reading unit 4 reads the front side, and the second image reading unit 5 reads the back side and discharges it to the paper discharge tray 22. As described above, when the predetermined document reading process is completed, the initial operation is performed again to move the white surface 52a of the background plate 52 to a position facing the second contact glass 7, and all operations are terminated. Wait until the next paper feed command is issued.

  The background switching signal may be transmitted by an operator pressing a background switching button on an operation panel provided in the main unit 2, and may be switched according to the type of document and the reading mode. Also good. For example, when switching according to the type of document and the reading mode, when “Double-sided thin paper document” is selected on the operation panel, when the duplex or thin paper mode is selected on the operation panel, The background color may be switched from white to black when the thin paper mode is simultaneously selected on the operation panel.

  In the present embodiment, the drive motor MT is driven only in one direction (forward rotation) so that the background plate 52 rotates only in the arrow direction (upstream direction of conveyance) shown in FIG. . This is to prevent the film member 59 disposed so as to contact the background plate 52 and the white surface 51a or the black surface 51b of the background plate 52 from being damaged or damaged. Further, by rotating the drive motor MT in one direction without forward / reverse rotation, the control is simplified, and there is an advantage that an error in rotation positioning accuracy is reduced.

  Next, a series of flow from feeding a document to reading it through a reading process will be outlined with reference to FIG. When an empty sensor (not shown) detects that an original is first placed on the paper feed tray 20, the feeding roller 27 and the paper feed roller 28 are driven. As a result, the plurality of documents placed on the sheet feeding tray 20 are sequentially fed out and separated into one sheet by the separation pad 29.

  When a registration sensor (not shown) detects the leading edge of the document that has passed through the separation pad 29, the document is transported by a predetermined amount from the point of detection, thereby aligning the leading edge of the document with the nip portion of the registration roller pair 30. And the skew is removed. Thereafter, the registration roller pair 30, the feed roller pair 31, and the first to third transport roller pairs 32, 33, and 34 are driven. The original passes through the first image reading unit 4 to the second image reading unit 5 in order with the front and back surfaces reversed while being conveyed along the paper feed path 23 extending in a U-shape. When passing through the first image reading unit 4, the front surface of the document is read, and when passing through the second image reading unit 5, the opposite surface (back surface) of the document is read.

  Before the leading edge of the document that has passed through the second image reading section 5 reaches the third transport roller pair 34, the third transport roller pair 34 and the discharge roller pair 35 are driven, and the first transport roller pair 35 is driven. A document whose both front and back sides are read via the image reading unit 4 and the second image reading unit 5 is discharged to a discharge tray 22. Note that when only one side of the document is read, either the first image reading unit 4 or the second image reading unit 5 is selected.

  As described above, in the document reading apparatus 1 of the present invention, the background plate 52 for switching the background color of the document is composed of the two plane portions of the white surface 52a and the black surface 52b, and these plane portions are switched by rotation. It has a structure. For this reason, even when the second image reading unit 5 for reading a double-sided document is provided in a limited space such as the transport reading unit 3, the second image reading unit 5 faces the second image reading unit 5. Thus, a background color switching mechanism including the background plate 52 can be incorporated. In addition, the front and back surfaces of a double-sided document can be continuously read along the document conveyance direction, and show-through of the double-sided document can be reliably prevented.

  In this embodiment, in order to form two white and black background surfaces, the background plate 52 in which the white surface 52a and the black surface 52b are connected in an L shape is used, but a square columnar support member is used. Any two side surfaces of the support member in the four directions can be configured as a white surface and a black surface. Further, by configuring one side surface of the support member facing each other as a pair of white surfaces and the other side surface as a pair of black surfaces, the white surface and the black surface are alternately switched every half rotation. You can also

DESCRIPTION OF SYMBOLS 1 Document reading apparatus 2 Main body unit 3 Conveyance reading unit 4 1st image reading part 5 2nd image reading part 6 1st contact glass 7 2nd contact glass 8 3rd contact glass 10 Light source 11-15 Mirror 16 Lens 17 Photoelectric conversion element 20 Paper feed tray 21 Support tray 22 Paper discharge tray 23 Paper feed path 24 Relay path 25 Paper discharge path 26 Side guide 27 Feed roller 28 Paper feed roller 29 Separation pad 30 Registration roller pair 31 Feed roller pair 32 First 1 conveyance roller pair 33 2nd conveyance roller pair 34 3rd conveyance roller pair 35 discharge roller pair 41 Light source 42-44 Mirror 45 Lens 46 Photoelectric conversion element 50 Guide means 51 Background switching body 52 Background plate 52a, 52b Plane Portions 53a and 53b Rotating shaft 54 Abutment plate 55 Guide holder 56 Guy Rotating pin 58 Rotating pin 58 Biasing spring 59 Film member 60 Support member 61 Rotating guide portion 62a, 62b Side plate 63a to 63d Protruding portion 63e Overhanging portion 64a to 64d Protruding portion 64e Overhanging portion 65 Boss 66 Engaging hole 67 Screw Hole 68 Fixing screw 69 Through hole 70 Bracket 71 Support frame 72 Detection flag 73 Position sensor

Claims (7)

A reading unit having a reading surface for reading a document, a conveying unit that conveys the document to the reading surface, and a guide that is arranged to face the reading surface and guides reading of the document along the reading surface A document reading apparatus comprising:
The guide means includes a background switching body provided such that at least two plane portions having different background colors are formed at an angle, and the respective plane portions are rotatably provided so as to face the reading surface;
The background switching body is rotatably held, and includes a guide holder for guiding a document that passes through the reading surface,
The document reading apparatus, wherein the guide holder is disposed so as to be swingable toward the reading surface. The said guide means is provided with the rotation drive means which rotates the said background switching body, By this rotation drive means, it rotates so that the at least 2 said plane part from which a background color differs opposes the said reading surface. Document reading device. The background switching body is in contact with the reading surface, and a protrusion for holding a constant gap between the reading surface and the flat portion and between the reading surface and the corner where the two flat portions intersect. The document reading device according to claim 1 , wherein the document reading device is provided. Wherein the guide means, original reading apparatus according to claim 1 or 2 comprising a biasing member each flat portion of the background switching body for biasing the guide holder so as to face the reading surface. The background switching body, the document reading apparatus according to any one of claims 1 to 4 having two flat portions formed of white color background color and black color background color of. When switching the background switching member each flat portion is rotated and while the corners of the flat portion comes into contact with the reading surface, rocking in a direction away from the surface reading the guide holder against the biasing member The guide holder is swung by the urging member when any one of the flat portions rotates toward a position facing the reading surface, and the flat portions are positioned at positions facing the reading surface. The document reading device according to claim 4, which moves.
The guide holder is extended toward the downstream side of the document from the reading surface, provided the swing fulcrum for guiding the document having passed through the reading surface in the conveying direction downstream side of the document from the reading surface The document reading apparatus according to claim 1.

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