JP6089452B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus that reads an image of a document.

  An image reading apparatus that reads an image of a document is used alone as an image scanner or in combination with an image forming apparatus.

  The image reading apparatus is provided with, for example, an image sensor and a document conveyance path that passes through the image sensor. While the document is being transported along the document transport path, the document faces the image sensor. At this time, light is emitted from the image sensor to the document. Then, the reflected light from the original is received by the image sensor, whereby reading of the image formed on the original is achieved.

  Some image reading apparatuses have a configuration in which a cover is provided in the apparatus main body so that the cover can be opened and closed, and two document conveyance paths are selectively formed by opening and closing the cover. Patent Document 1 describes an example of the configuration. In the configuration described in Patent Document 1, a U-shaped document conveyance path is formed by the inner surface of the cover with the cover closed. On the other hand, when the cover is opened, a part of the U-shaped document conveyance path is opened to form a linear document conveyance path. As a result, the document can be read while the cover is closed for a relatively weak document, and the document is transported by opening the cover for a relatively strong document such as a thick document. The image is read through the road without difficulty.

JP 2000-128413 A

  However, in the above-described configuration, when the cover is opened, a portion constituting a part of the U-shaped document conveyance path is exposed. Therefore, light from outside (external light) easily enters the vicinity of the image sensor.

  If external light enters the vicinity of the image sensor, correct white data cannot be acquired when the white reference is read by the image sensor. For this reason, it is not possible to satisfactorily perform shading correction using white data, and the accuracy of image reading decreases. In addition, when reading an image on a document, the reading accuracy of the image may be reduced due to external light.

  An object of the present invention is to provide an image reading apparatus capable of suppressing external light from entering the vicinity of a reading unit.

In order to achieve the above object, an image reading apparatus according to the present invention includes a conveyance unit that conveys a document, a cover that covers the conveyance unit, a reading unit that reads an image of a document conveyed by the conveyance unit, An opening / closing portion provided on the cover so as to be displaceable between an open position for opening a discharge port from which a document conveyed by the conveyance portion is discharged and a closed position for closing the discharge port; and the conveyance portion and the discharge port A guide surface that extends along a first transport path of a document that is transported toward the discharge port by the transport unit, guides the document toward the discharge port, the reading unit, The one end portion is disposed between the discharge port, the one end portion protrudes into the conveyance path of the document conveyed toward the discharge port by the conveyance unit, and the cover is positioned at the open position, and the Enter toward the scanning unit And a shielding film having a contact portion shielding portion and the opening and closing unit to shield the light in contact with the guide surface when positioned in the open position.

  The document is conveyed toward the discharge port by the conveyance unit. During the conveyance, the image of the original is read by the reading unit.

  The transport unit is covered with a cover. The opening / closing part is provided on the cover so as to be displaceable between an open position for opening the discharge port and a closed position for closing the discharge port.

  A shielding unit is provided between the reading unit and the discharge port to block external light entering from the discharge port toward the reading unit. Therefore, it is possible to suppress external light from entering the vicinity of the reading unit, and consequently, it is possible to suppress deterioration in image reading accuracy due to external light entering.

Moreover, the contact part of a shielding film contacts a guide surface, when an opening- and- closing part is located in an open position . Therefore, the document discharged from the discharge port is pressed by the contact portion. As a result, the document discharged from the discharge port can be prevented from falling, and the document can be discharged satisfactorily.

Guide surface for guiding toward the document in the discharge port that has been kicked set.

  Thereby, the distance between the reading unit and the discharge port can be secured to some extent. As a result, it is possible to further suppress external light from entering the vicinity of the reading unit. By shielding the first transport path with the shielding unit, it is possible to satisfactorily suppress external light from entering the vicinity of the reading unit through the first transport path.

The shielding film may have a V shape formed by bending one film-like member. In this case, the contact portion may be a corner portion of the V-shaped film-like member, and the corner portion may protrude into the first transport path.

  External light can be shielded at the portion where the film-like member is doubled. Therefore, it is possible to further suppress external light from entering the vicinity of the reading unit.

  In addition, the film-like member is bent into a V-shape, so that the film-like member is depressed. For this reason, it is possible to satisfactorily hold down the document discharged from the discharge port by the corners of the V-shaped film-like member.

  Furthermore, fine irregularities such as a cut mark do not occur at the corners formed by bending the film-like member into a V shape. Therefore, it is possible to prevent the original from being scratched when the corner portion rubs against the original conveyed on the first conveyance path.

  The image reading apparatus may be provided so as to face the reading unit and include a contact surface that comes into contact with the document conveyed by the conveying unit.

  In this case, the document comes into contact with the contact surface during conveyance. At this time, the image of the document can be read by the reading unit arranged to face the contact surface.

  The cover may have a first surface located above the reading unit and the contact surface, and a second surface extending in a direction intersecting both the contact surface and the first surface. In this case, the opening / closing part is preferably formed on the second surface.

  Thereby, the upper part of the reading unit and the contact surface is covered with the first surface of the cover regardless of the position of the opening / closing unit. Therefore, it is possible to prevent external light from entering the reading unit and the contact surface from above. In addition, since the second surface extends in a direction intersecting the contact surface and the first surface, even when the opening / closing portion is located at the open position, it can be viewed from above an indoor lamp or the like in which the image reading apparatus is installed. Light is prevented from entering through the outlet.

  The image reading apparatus may include a placement surface on which the document is placed.

  In the first reading method, the document is placed on the placement surface. Then, the image of the original is read by the reading unit while the reading unit moves along the placement surface. In the second reading method, the document is transported toward the discharge port by the transport unit. In the middle of this conveyance, the image of the original is read by the reading unit stopped at the fixed position.

  The opening / closing part is provided to be displaceable between an open position for opening the discharge port and a closed position for closing the discharge port. When the opening / closing unit is in the open position and the discharge port is open, the document conveyed by the conveyance unit is discharged from the discharge port.

  The cover may be a document cover provided so as to be displaceable between a position covering the placement surface and a position opening the placement surface. The cover has a first surface and a second surface. The first surface is located above the placement surface. The second surface extends in a direction that intersects both the placement surface and the first surface.

  An opening / closing part is formed on the second surface of the cover. Therefore, the upper surface of the placement surface is covered with the first surface of the document cover regardless of the position of the opening / closing portion. Thereby, it is suppressed that external light enters into the vicinity of a mounting surface from the upper direction. In addition, since the second surface extends in a direction intersecting the placement surface and the first surface, even when the opening / closing portion is located at the open position, the upper surface of the indoor lighting lamp or the like in which the image reading apparatus is installed Is prevented from entering through the outlet.

  A guide unit may be provided between the reading unit and the discharge port so as to be displaceable between a first position and a second position different from the first position. The guide unit communicates between the reading unit and the discharge port in a state where the guide unit is located at the first position, guides the document to the first transport path, and in a state where the guide unit is positioned in the second position, And the document is guided to a second transport path different from the first transport path. In the configuration in which the guide portion is provided, it is preferable that the other end portion of the shielding portion is fixed to the guide portion.

  Since the other end part of the shielding part is fixed to the guide part, when the guide part is displaced from the second position to the first position, the shielding part is displaced accordingly. Thereby, according to the position of a guide part, a shielding part can be arrange | positioned in the position where external light is shielded favorably. Therefore, in the state where the guide portion is disposed at the first position, the reading unit and the discharge port communicate with each other, and the external light easily enters the reading unit. However, the external light is shielded by the shielding unit. And the entry of external light into the vicinity of the reading unit can be suppressed.

  The first transport path may be a path that can transport the document while suppressing the curvature of the document compared to the second transport path.

  The smaller the curvature of the first conveyance path, that is, the closer the first conveyance path is to a straight line, the easier it is for external light entering from the discharge port to reach the reading unit. Can be prevented from reaching outside light.

  The image reading device is provided between the contact surface and the discharge port, and is disposed opposite to the second reading unit that reads an image of a document conveyed by the conveying unit, and is conveyed by the conveying unit. And a second contact surface that contacts the original document.

  In this case, the document comes into contact with the second contact surface during conveyance. At this time, the image of the document can be read by the reading unit arranged to face the second contact surface.

  It is preferable that the contact surface is in contact with one surface of the document, and the second contact surface is in contact with the other surface opposite to the one surface of the document.

  As a result, images on both sides of one side and the other side of the original can be read during a single conveyance of the original.

  The second reading unit may be fixed at a position facing the second contact surface.

  In the configuration in which the second reading unit is movably provided, for example, in order to acquire correct white data, the second reading unit is moved to a position that is not easily affected by external light, and the white reference is set by the second reading unit. It is possible to read. However, since the shielding unit is provided, even if the second reading unit is fixed, it is possible to suppress external light from entering the vicinity of the second reading unit. As a result, the white reference can be accurately read by the second reading unit, and correct white data can be acquired.

  According to the present invention, it is possible to prevent external light from entering the vicinity of the reading unit. As a result, it is possible to suppress a decrease in image reading accuracy due to the entry of external light.

FIG. 1 is a perspective view of a multifunction peripheral according to an embodiment of the present invention as viewed from the upper left front, showing a state in which a document transport unit is closed. FIG. 2 is a perspective view of the multifunction machine as viewed from the upper left front, and shows a state in which the document transport unit is opened. FIG. 3 is a perspective view of the image reading unit as viewed from the upper left front, and shows a state in which the tray and the discharge cover are opened. 4 is a cross-sectional view of the image reading unit taken along a cutting line AA shown in FIG. FIG. 5 is a cross-sectional view of a portion surrounded by a two-dot chain line shown in FIG. 4 and shows a state in which the flapper is arranged at the first position. 6 is a cross-sectional view of a portion surrounded by a two-dot chain line shown in FIG. 4, and shows a state in which the flapper is arranged at the second position. FIG. 7 is a cross-sectional view showing another configuration of the shielding film, and shows a state in which the flapper is arranged at the first position. FIG. 8 is a cross-sectional view showing another configuration of the shielding film, showing a state in which the flapper is disposed at the second position.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
<Multifunction device>

  As shown in FIG. 1, the multi-function device 100 has a substantially rectangular parallelepiped shape. The multifunction device 100 includes an image forming unit 200 and an image reading unit 300 disposed on the image forming unit 200.

  The image forming unit 200 has a substantially rectangular parallelepiped shape. The image forming unit 200 incorporates an ink-jet or electrophotographic image forming mechanism for realizing a printer function.

  An operation panel P that is operated by the user is disposed on the upper front portion of the image forming unit 200.

  Note that, with the front side of the image forming unit 200 as the front side, the directions of up, down, left, and right are defined with reference to when each part of the multifunction device 1 is viewed from the front side. In each figure after FIG. 1, in order to assist understanding of drawing, the prescribed direction is shown by the arrow.

  An image reading unit 300 as an example of an image reading device has a flat, substantially rectangular parallelepiped shape. The image reading unit 300 has a posture of being stacked on the image forming unit 200 around an axis extending in the left-right direction in the vicinity of the rear upper end of the image forming unit 200, and a posture in which the front side is lifted and unfolded with respect to the image forming unit 200. Is provided so as to be capable of rotational displacement.

  With the image forming unit 200 in the unfolded posture, the inside of the image forming unit 200 is exposed, and maintenance work and the like of each part built in the image forming unit 200 can be performed.

  The image reading unit 300 includes an upper unit 301 and a lower unit 302. As shown in FIG. 1, the upper unit 301 as an example of the document cover is stacked on the lower unit 302 around the axis extending in the left-right direction in the vicinity of the rear upper end of the lower unit 302, as shown in FIG. As shown, the front side is lifted with respect to the lower unit 302 so as to be deployed.

<External configuration of image reading unit>

  The upper unit 301 of the image reading unit 300 includes a front side plate 11, a rear side plate 12, a left side plate 13 and a right side plate 14.

  The front side plate 11 and the rear side plate 12 have a rectangular shape in a side view extending long in the left-right direction, and are arranged to face each other with an interval in the front-rear direction.

  The left side plate 13 includes a front left side plate 15 having a square shape in side view and a rear left side plate 16 having a square shape in side view, which is relatively arranged on the rear side. The front end edge of the front left side plate 15 is connected to the left end edge of the front side plate 11 via a connecting portion 17 having a ¼ arc shape in plan view. The rear left side plate 16 is connected to the left end edge of the rear side plate 12 via a connecting portion 18 having a ¼ arc shape in plan view.

  The right side plate 14 has a rectangular shape in a side view extending in the front-rear direction, and a front end edge thereof is connected to a right end edge of the front side plate 11 via a 1/4 arc-shaped connecting portion 19 in a plan view, and a rear end edge Is connected to the right edge of the rear plate 12 through a connecting portion 20 having a ¼ arc shape in plan view.

  An upper plate 21 is installed between the upper end edges of the right end portions of the front side plate 11 and the rear side plate 12.

  A tray 22 is provided between the center portions in the left-right direction of the front side plate 11 and the rear side plate 12. The tray 22 can be displaced between a non-use position and a use position. In a state where the tray 22 is disposed at the non-use position, the outer surface of the tray 22 is disposed on the same plane as the upper surface of the upper plate 21 as shown in FIG. When the tray 22 is displaced from the non-use position to the use position, the left end portion of the tray 22 arranged at the non-use position is lifted, and the tray 22 is rotated rightward with the right end portion as a fulcrum. The tray 22 extends in an upwardly inclined manner at the use position.

  A maintenance cover 23 is provided between the left end portions of the front side plate 11 and the rear side plate 12. The maintenance cover 23 is configured to be openable and closable by pivoting about an axis extending along the right edge. In a state where the maintenance cover 23 is closed, the outer surface of the maintenance cover 23 is disposed on the same plane as the upper surfaces of the upper plate 21 and the tray 22. In a state in which the maintenance cover 23 is opened, the maintenance cover 23 has a posture in which the left end portion is lifted upward and extends while being inclined to the left.

  The upper surface 24 of the upper unit 301 is formed by the upper surface of the upper plate 21, the outer surface of the tray 22, and the outer surface of the maintenance cover 23 in a state where the tray 22 is disposed at the non-use position and the maintenance cover 23 is closed.

  The front left side plate 15 and the rear left side plate 16 are formed to have the same length in the front-rear direction, and are spaced from each other. A discharge cover 25 as an example of an opening / closing part is provided between the front left side plate 15 and the rear left side plate 16. The discharge cover 25 is configured to be openable and closable by pivoting about a pivot shaft 26 (see FIG. 4) extending along the lower edge. In a state where the discharge cover 25 is closed, the outer surface of the discharge cover 25 is disposed on the same plane as the outer surfaces of the front left side plate 15 and the rear left side plate 16, and together with the outer surfaces of the front left side plate 15 and the rear left side plate 16. The left side surface 27 of the upper unit 301 is formed. The upper surface 24 as an example of the first surface and the left side surface 27 as an example of the second surface form an example of a cover. On the other hand, when the discharge cover 25 is opened, a rectangular discharge port 28 that is long in the front-rear direction in a side view is formed between the front left side plate 15 and the rear left side plate 16 as shown in FIGS. The

  As shown in FIG. 1, in a state where both the maintenance cover 23 and the discharge cover 25 are closed, the left end edge of the maintenance cover 23 and the upper end edge of the discharge cover 25 are abutted with each other, and there is almost no gap. And extend in the front-rear direction.

  A finger insertion portion 30 is formed at the center in the front-rear direction at the left end of the maintenance cover 23. The finger insertion part 30 has a shape cut into a rectangular shape from the left end edge of the maintenance cover 23 in a plan view. The finger insertion portion 30 is recessed downward from the upper surface of the maintenance cover 23, opened upward and leftward, and forms a recess having a bottom surface 31. In a state where both the maintenance cover 23 and the discharge cover 25 are closed, the fingertip is inserted into the finger insertion portion 30 and the upper end portion of the discharge cover 25 is pushed leftward by the fingertip, whereby the discharge cover 25 is opened. . When both the maintenance cover 23 and the discharge cover 25 are closed, the fingertip is inserted into the finger insertion portion 30 and the left end portion of the maintenance cover 23 is pulled upward by the fingertip, so that the maintenance cover 23 is opened. It is.

<Internal configuration of image reading unit>

  As shown in FIG. 3, a supply unit 41 and a discharge unit 42 are provided in a portion exposed when the tray 22 is disposed at the use position.

  The supply unit 41 is located below the discharge unit 42. The upper surface of the supply part 41 is formed in the plane extended in the front-back direction and the left-right direction except for a right end part. The right end of the upper surface of the supply unit 41 is gently curved and tilted upward. And the right end part of the upper surface of the supply part 41 is connected to the lower end part of the inner surface of the tray 22 arranged at the use position with a minute gap.

  The supply unit 41 is provided with a pair of document width guides 43. The pair of document width guides 43 face each other in the front-rear direction. The pair of document width guides 43 is configured to be able to approach and separate with the same amount of movement with respect to the center between them. The distance between the pair of document width guides 43 is adjusted to the width of the document, and the document is inserted between the pair of document width guides 43 from the right side, so that the document is placed on the supply unit 41 and the tray 22. Placed on the center basis.

  Each document width guide 43 is formed with an extending portion 43a. The extending portion 43 a extends from the upper edge of the document width guide 43 toward the inside in the facing direction of the pair of document width guides 43.

  The discharge unit 42 is provided above the supply unit 41 and spaced from the supply unit 41. The discharge part 42 has a rectangular plate shape extending in the front-rear direction and the left-right direction. On the discharge unit 42, the document is discharged from the inside of the housing 2 toward the right side. The right end portion of the document is placed on the tray 22 beyond the discharge portion 42. The left end portion of the document remains on the discharge unit 42 and is placed on the discharge unit 42. Note that since the extending portion 43a of the document width guide 43 is positioned above the document set on the supply unit 41, the discharged document placed on the discharge unit 42 and the tray 22 and the supply unit 41 and It is not mixed with the original before reading placed on the tray 22.

  As shown in FIG. 4, a common path 44 is formed inside the upper unit 301. The common path 44 extends leftward from the left end portion of the supply unit 41, bends and extends obliquely to the lower left, and further bends and extends leftward.

  A path through which the document is conveyed by the supply roller 45, the separation roller 46, the first LF roller 47, the driven roller 48, the second LF roller 49, and the driven rollers 50 and 51 forms a common path 44. In addition, between the above-mentioned rollers, such as between the first LF roller 47 and the second LF roller 49, a guide portion constituted by a rib, a first contact glass 61 and a second contact glass 62 described later, and the like is provided. A common path 44 is formed by the guide portion and the various rollers.

  The supply roller 45 is disposed at the entrance of the common path 44. The supply roller 45 is provided to be rotatable about an axis extending in the front-rear direction.

  The separation roller 46 is provided to the left with respect to the supply roller 45. The separation roller 46 is provided to be rotatable about an axis extending in the front-rear direction. A separation piece 52 is provided above the separation roller 46. The separation piece 52 is made of rubber, for example. The separation piece 52 is in elastic contact with the peripheral surface of the separation roller 46 from above.

  The first LF roller 47 and the driven roller 48 are arranged to face each other with a portion inclined downward to the left in the common path 44. The first LF roller 47 and the driven roller 48 are provided so as to be rotatable about an axis extending in the front-rear direction. The peripheral surface of the driven roller 48 is in contact with the peripheral surface of the first LF roller 47 from below.

  The second LF roller 49 and the driven rollers 50 and 51 are disposed near the exit of the common path 44.

  For example, three second LF rollers 49 as an example of the conveying roller are provided in the front-rear direction. The three second LF rollers 49 are attached to the rotary shaft 23 extending in the front-rear direction at intervals. The center second LF roller 49 is disposed at the center in the front-rear direction of the upper unit 301. Both end portions of the rotating shaft 23 are rotatably held by the upper unit 301. Accordingly, the three second LF rollers 49 are provided to be rotatable around the rotation shaft 23.

  The driven roller 50 is disposed to face each second LF roller 49 with the common path 44 interposed therebetween. The driven roller 50 is provided to be rotatable about an axis extending in the front-rear direction. The peripheral surface of the driven roller 50 is in contact with a position slightly to the right of the lowest point of the peripheral surface of each second LF roller 49.

  The driven roller 51 is disposed so as to face the central second LF roller 49 across the common path 44. The driven roller 51 is not provided for the front and rear second LF rollers 49. The driven roller 51 is provided to be rotatable about an axis extending in the front-rear direction. The peripheral surface of the driven roller 51 is in contact with a position slightly to the left of the lowest point of the peripheral surface of the central second LF roller 49.

  The common path 44 passes over the first contact glass 61 and the second contact glass 62 between the first LF roller 47 and the second LF roller 49.

  The first contact glass 61 as an example of the placement surface is made of a glass plate and is held by the lower unit 302. The first contact glass 61 has a rectangular thin plate shape extending in the left-right direction. The width of the first contact glass 61 in the front-rear direction is substantially equal to the width of the common path 44 in the front-rear direction. The common path 44 passes above the left end 61L of the first contact glass 61.

Below the first contact glass 61 is a CIS (Contact
An image sensor module 63 is provided. The CIS module 63 is mounted on a carriage 65 that can reciprocate along the guide rail 64. The guide rail 64 extends in the left-right direction in parallel with the first contact glass 61. As a result, when the carriage 65 moves along the guide rail 64, the CIS module 63 moves along the first contact glass 61 in the left-right direction. For example, an LED light source, a lens, an image sensor, and the like are provided inside the CIS module 63.

  A first document pressing member 66 is provided above the first contact glass 61. The first document pressing member 66 is made of, for example, a white resin, and has a rectangular shape that has substantially the same width in the front-rear direction as the first contact glass 61 and is shorter in the left-right direction than the first contact glass 61. The first document pressing member 66 is held by the upper unit 301.

  In the state where the upper unit 301 is in the unfolded posture, as shown in FIG. 2, the first contact glass 61 is exposed on the upper surface of the lower unit 302, and the first document pressing member 66 is exposed on the lower surface of the upper unit 301. . On the other hand, in a state in which the upper unit 301 is stacked on the lower unit 302, the first document pressing member 66 has a left end 61L as an example of the contact surface of the first contact glass 61 as shown in FIG. It is pressed by the removed part. At this time, the upper unit 301 functions as a document cover that covers the first contact glass 61.

  A second document pressing member 67 is provided above the left end 61L of the first contact glass 61. The second document pressing member 67 is made of, for example, a white resin, and is formed to have substantially the same length as the first contact glass 61 in the front-rear direction. The second document pressing member 67 is elastically pressed from above onto the left end portion 61L of the first contact glass 61 while being held by the upper unit 301 so that the upper unit 301 is stacked on the lower unit 302. The

  The second contact glass 62 as an example of the second contact surface is made of a glass plate, is held by the upper unit 301, and faces the common path 44 from above on the left side of the first contact glass 61. The second contact glass 62 has a rectangular thin plate shape that is long in the front-rear direction. The width in the front-rear direction of the second contact glass 62 is substantially equal to the width in the front-rear direction of the common path 44.

  Above the second contact glass 62, a CIS module 68 as an example of a second reading unit is provided. The CIS module 68 is fixed to the upper unit 301. The CIS module 68 is disposed in a portion overlapping the second LF roller 49 when viewed from a direction parallel to the second contact glass 62. In the CIS module 68, for example, an LED light source, a lens, an image sensor, and the like are provided.

  A third document pressing member 69 is provided below the second contact glass 62. The third document pressing member 69 is made of, for example, a white resin, and is formed in substantially the same length as the second contact glass 62 in the front-rear direction. The third document pressing member 69 is held by the lower unit 302 and is elastically pressed from below by the second contact glass 62 in a state where the upper unit 301 is stacked on the lower unit 302.

  A U-turn path 71 and a straight path 72 described later are formed inside the upper unit 301.

  A wall portion 73 projects from the inner surface of the maintenance cover 23. The wall portion 73 extends in the front-rear direction, and has a guide surface that is curved along the peripheral surface of the second LF roller 49 with a space leftward with respect to the peripheral surface of the second LF roller 49. In addition, a U-turn guide member 75 extending in the left-right direction is formed in the upper unit 301 with a space downward from the inner surface of the maintenance cover 23. The left end portion of the U-turn guide member 75 is disposed at a position that is slightly spaced on the right side with respect to the uppermost position of the peripheral surface of the second LF roller 49. The right end portion of the U-turn guide member 75 is disposed at a position with a minute gap on the left side with respect to the left end portion of the discharge portion 42.

  The U-turn path 71 as an example of the second transport path is a space between the peripheral surface of the second LF roller 49 and the guide surface of the wall portion 73 and between the inner surface of the maintenance cover 23 and the upper surface of the U-turn guide member 75. It is formed by space. The entrance of the U-turn path 71 is formed by a second LF roller and a flapper 78 described later, and communicates with the exit of the common path 44. The U-turn path 71 is curved upward along the peripheral surface of the second LF roller 49 from the entrance, and extends rightward from the uppermost position of the peripheral surface of the second LF roller 49. The outlet of the U-turn path 71 is formed by the right end portion of the inner surface of the maintenance cover 23 and the U-turn guide member 75. The width of the U-turn path 71 in the front-rear direction is substantially equal to the width of the common path 44 in the front-rear direction.

  A driven roller 76 is disposed on the upper left side of the second LF roller 49 with the U-turn path 71 interposed therebetween. The driven roller 76 is provided to be rotatable about an axis extending in the front-rear direction. The peripheral surface of the driven roller 76 is in contact with the peripheral surface of the second LF roller 49 from the upper left.

  The straight path 72 as an example of the first transport path extends obliquely from the exit of the common path 44 to the upper left.

  Specifically, a straight guide member 77 is provided on the left side of the driven roller 51. The straight guide member 77 has a thin plate shape. The straight guide member 77 extends slightly to the left from the vicinity of the center position in the vertical direction on the peripheral surface of the driven roller 51, and bends and extends to the upper left. The left end portion of the straight guide member 77 is disposed in the vicinity of the lower end portion of the discharge cover 25. The length of the straight guide member 77 in the front-rear direction is slightly smaller than the distance between the rear end surface of the front second LF roller 49 and the front end surface of the rear second LF roller 49. The straight path 72 is formed by a space extending in the upper left direction along an upper surface 77U as an example of a guide surface of the straight guide member 77.

  A flapper 78 as an example of a guide portion is disposed at a branch portion between the U-turn path 71 and the straight path 72. The flapper 78 has a substantially rectangular plate shape extending in the front-rear direction. Further, the flapper 78 is provided in the upper unit 301 so as to be swingable between a first position shown in FIG. 5 and a second position shown in FIG. 6 around a swing axis extending in the front-rear direction. .

  As shown in FIG. 5, the flapper 78 in the first position extends along the straight path 72 and is disposed so that the right end thereof closes the U-turn path 71. The flapper 78 at the first position allows the original to enter the straight path 72 from the common path 44.

  On the other hand, the flapper 78 at the second position is arranged such that the curved surface 79 extends along the U-turn path 71 and the lower end thereof closes the straight path 72 as shown in FIG.

  A shielding film 91 as an example of a shielding part is attached to the flapper 78. The shielding film 91 is made of a rectangular film sheet that extends long in one direction. The shielding film 91 is mountain-folded with a polygonal line extending at an interval from one end edge along the longitudinal direction. Then, the outer surface of the base end portion 92 (one example of the other end portion) on the one end edge side with respect to the broken line in the shielding film 91 is attached to the attaching surface 80 opposite to the curved surface 79 of the flapper 78 using a double-sided tape. It has been. In the state where the flapper 78 is arranged at the first position, as shown in FIG. 5, the tip end portion 93 (an example of one end portion) along the longitudinal direction of the shielding film 91 protrudes into the straight path 72. The straight path 72 is traversed and is in contact with the upper surface 77U of the straight guide member 77. Further, in the state where the flapper 78 is disposed at the second position, as shown in FIG. 6, the leading end 93 extends along the straight path 72 in the document discharge direction.

  The flapper 78 is switched between the first position and the second position in conjunction with opening and closing of the discharge cover 25.

  A link mechanism 79 is provided for this interlocking. The link mechanism 79 includes a first link arm 81, a second link arm 82 and a cam member 83. One end of the first link arm 81 is rotatably connected to the discharge cover 25. The other end of the first link arm 81 is rotatably connected to one end of the second link arm 82. The other end of the second link arm 82 is connected to the cam member 83 so as not to be relatively rotatable. The cam member 83 is supported by a rotation shaft that extends in the front-rear direction. A rotation shaft of the cam member 83 is rotatably held by the upper unit 301. On the peripheral surface of the cam member 83, a protruding portion 84 is formed to protrude.

  In the state where the discharge cover 25 is closed, as shown in FIG. 5, the protruding portion 84 of the cam member 83 contacts the upper end portion of the flapper 78 from the left side, and the flapper 78 is disposed at the second position. When the discharge cover 25 is opened from this state, the first link arm 81 moves to the left. As the first link arm 81 moves, one end of the second link arm 82 moves to the left, and the other end of the second link arm 82 and the cam member 83 rotate clockwise in FIG. . As a result, as shown in FIG. 6, the protrusion 84 of the cam member 83 is separated from the flapper 78, and the flapper 78 is displaced from the second position where the U-turn path 71 is formed to the first position where the straight path 72 is formed. . Further, when the discharge cover 25 is closed from this state, the first link arm 81 moves to the right. As the first link arm 81 moves, one end of the second link arm 82 moves to the right, and the other end of the second link arm 82 and the cam member 83 rotate counterclockwise in FIG. To do. As a result, as shown in FIG. 5, the protruding portion 84 of the cam member 83 presses the flapper 78 from the left side, and the flapper 78 is displaced from the first position to the second position.

<Image reading operation 1>

  The image reading unit 300 can use the ADF (Auto Document Feeder) function to read in parallel images formed on both sides of the document by the ADF method, which is an example of the second reading method. It is also possible to read an image formed on one side of the document.

  For example, when the document is A4 size plain paper, the discharge cover 25 is closed. As shown in FIG. 3, with the tray 22 opened, the distance between the pair of document width guides 43 is adjusted to the length of the short side of A4 size. Thereafter, the document is inserted between the pair of document width guides 43 from the right side. The distance between the pair of document width guides 43 is adjusted to the length of the inserted document in the front-rear direction. Thus, the document is placed on the supply unit 41 and the tray 22.

  The leading end portion of the document inserted from the right side between the pair of document width guides 43 is disposed on the peripheral surface of the supply roller 45. When the supply roller 45 is rotated counterclockwise when viewed from the front side, the original is fed into the common path 44 by the frictional force between the lower surface of the lowermost original on the supply unit 41 and the peripheral surface of the supply roller 45. . At this time, together with the lowermost document, several documents on it may be simultaneously sent to the common path 44 side.

  The separation roller 46 is rotated counterclockwise as viewed from the front side. When the leading edge of the document comes into contact with the contact portion between the circumferential surface of the separation roller 46 and the separation piece 52, the document is drawn between the circumferential surface of the separation roller 46 and the separation piece 52 by the rotation of the separation roller 46. The documents are reliably separated one by one by the frictional force received from the peripheral surface of the separation roller 46 and the separation piece 52. Then, the lowermost one of the plurality of documents passes between the peripheral surface of the separation roller 46 and the separation piece 52.

  The first LF roller 47 is rotated clockwise as viewed from the front side. As the first LF roller 47 rotates, the driven roller 48 is driven to rotate counterclockwise as viewed from the front side. When the leading edge of the document comes into contact with the contact portion between the circumferential surface of the first LF roller 47 and the circumferential surface of the driven roller 48, the leading edge of the document is rotated with the circumferential surface of the first LF roller 47 and the driven roller by rotation of the first LF roller 47. It is drawn between 48 peripheral surfaces. Then, a conveying force is applied from the first LF roller 47 to the document.

  As the document is conveyed, the lower surface of the document faces the left end 61L of the first contact glass 61. Then, light is irradiated from the CIS module 63 to the lower surface of the document on the left end portion 61L of the first contact glass 61. The reflected light on the lower surface of the document is received by the image sensor of the CIS module 63, whereby reading of the image formed on the lower surface of the document is achieved.

  In addition, the upper surface of the document faces the second contact glass 62. Then, light is irradiated from the CIS module 68 to the upper surface of the document on the second contact glass 62. The reflected light on the upper surface of the document is received by the image sensor of the CIS module 68, whereby reading of the image formed on the upper surface of the document is achieved.

  Thereafter, the leading edge of the document comes into contact with a contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 50. The second LF roller 49 is rotated clockwise as viewed from the front side. The driven roller 50 is driven to rotate counterclockwise as viewed from the front side as the second LF roller 49 rotates. As a result, the leading edge of the document is drawn between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 50. Then, a conveying force is applied to the document from the second LF roller 49.

  Next, the leading edge of the document comes into contact with the contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51. As the second LF roller 49 rotates, the driven roller 51 is driven to rotate counterclockwise as viewed from the front side. As a result, the leading edge of the document is drawn between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51. Then, a conveying force is applied to the document from the second LF roller 49.

  At this time, if the discharge cover 25 is closed, the flapper 78 is disposed at the second position where the U-turn path 71 is formed. Therefore, the document fed from between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51 is conveyed in the U-turn path 71 as the leading end thereof moves along the flapper 78.

  The document conveyed in the U-turn path 71 moves toward the contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 76. The driven roller 76 is driven to rotate counterclockwise as viewed from the front side as the second LF roller 49 rotates. When the leading edge of the document comes into contact with the contact portion between the circumferential surface of the second LF roller 49 and the circumferential surface of the driven roller 76, the leading edge of the document is between the circumferential surface of the second LF roller 49 and the circumferential surface of the driven roller 76. Be drawn. Then, a conveying force is applied to the document from the second LF roller 49.

  Thereafter, when the rear end of the document is separated from the contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 76, the document is discharged onto the discharge unit 42 and the tray 22 in a state straddling them. .

<Image reading operation 2>

  For example, when the document is a stiff postcard, the discharge cover 25 is opened. As shown in FIG. 3, with the tray 22 opened, the distance between the pair of document width guides 43 is adjusted to the length of the short side of the document. Thereafter, the document is inserted between the pair of document width guides 43 from the right side. The distance between the pair of document width guides 43 is adjusted to the length of the inserted document in the front-rear direction. Thus, a document such as a postcard is placed on the supply unit 41. .

  The leading end portion of the document inserted from the right side between the pair of document width guides 43 is disposed on the peripheral surface of the supply roller 45. When the supply roller 45 is rotated counterclockwise as viewed from the front side, the original is fed into the common path 44 by the frictional force between the lower surface of the original and the peripheral surface of the supply roller 45.

  The separation roller 46 is rotated counterclockwise as viewed from the front side. When the leading edge of the document comes into contact with the contact portion between the circumferential surface of the separation roller 46 and the separation piece 52, the document is drawn between the circumferential surface of the separation roller 46 and the separation piece 52 by the rotation of the separation roller 46. Then, the document passes between the peripheral surface of the separation roller 46 and the separation piece 52.

  The first LF roller 47 is rotated clockwise as viewed from the front side. As the first LF roller 47 rotates, the driven roller 48 is driven to rotate counterclockwise as viewed from the front side. When the leading edge of the document comes into contact with the contact portion between the circumferential surface of the first LF roller 47 and the circumferential surface of the driven roller 48, the leading edge of the document is rotated with the circumferential surface of the first LF roller 47 and the driven roller by rotation of the first LF roller 47. It is drawn between 48 peripheral surfaces. Then, a conveying force is applied from the first LF roller 47 to the document.

  As the document is conveyed, the lower surface of the document faces the first contact glass 61. Then, light is irradiated from the CIS module 63 to the lower surface of the document on the first contact glass 61. The reflected light on the lower surface of the document is received by the image sensor of the CIS module 63, whereby reading of the image formed on the lower surface of the document is achieved.

  In addition, the lower surface of the document faces the second contact glass 62. Then, light is irradiated from the CIS module 68 to the upper surface of the document on the second contact glass 62. The reflected light on the upper surface of the document is received by the image sensor of the CIS module 68, whereby reading of the image formed on the upper surface of the document is achieved.

  Thereafter, the leading edge of the document comes into contact with a contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 50. The second LF roller 49 is rotated clockwise as viewed from the front side. The driven roller 50 is driven to rotate counterclockwise as viewed from the front side as the second LF roller 49 rotates. As a result, the leading edge of the document is drawn between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 50. Then, a conveying force is applied to the document from the second LF roller 49.

  Next, the leading edge of the document comes into contact with the contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51. As the second LF roller 49 rotates, the driven roller 51 is driven to rotate counterclockwise as viewed from the front side. As a result, the leading edge of the document is drawn between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51. Then, a conveying force is applied to the document from the second LF roller 49.

  At this time, since the discharge cover 25 is opened, the flapper 78 is disposed at the first position where the straight path 72 is formed. That is, since the flapper 78 allows the original to enter the straight path 72 from the common path 44, the original fed from between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51 is the straight path 72. Be transported.

  Further, since the flapper 78 is disposed at the first position, the leading end portion 93 of the shielding film 91 protrudes into the straight path 72 and is in contact with the upper surface 77U of the straight guide member 77. Accordingly, the document is conveyed through the straight path 72 while being rubbed against the leading end portion 93 of the shielding film 91.

  Thereafter, when the trailing edge of the document is separated from the contact portion between the peripheral surface of the second LF roller 49 and the peripheral surface of the driven roller 51, the leading edge of the document is discharged in a state where it is disposed on the discharge cover 25.

<Image reading operation 3>

  The image reading unit 300 can read an image formed on one side of a document by a flat bed method which is an example of a first reading method.

When reading an image by the flat bed method, the upper unit 301 is displaced from the posture in which the upper unit 301 is stacked on the lower unit 302 to the posture in which the front side is lifted and deployed. Thereby, the first contact glass 61 is exposed. A document is placed on the exposed first contact glass 61 with the surface to be read facing the first contact glass 61 side. Thereafter, the upper unit 301 is returned to the posture of being stacked on the lower unit 302. Then, light is irradiated from the CIS module 63 to the lower surface of the document on the first contact glass 61 while the CIS module 63 is moved at a constant speed in the left-right direction. The reflected light on the lower surface of the document is received by the image sensor of the CIS module 63, whereby reading of the image formed on the lower surface of the document is achieved.
<Effect>

  A transport mechanism as an example of a transport unit including the first LF roller 47, the driven roller 48, the second LF roller 49, and the driven rollers 50 and 51 disposed along the common path 44 is covered by the upper surface 24 of the upper unit 301. Yes. On the left side surface 27 of the upper unit 301, the discharge cover 25 is provided so as to be displaceable between an open position for opening the discharge port 28 and a closed position for closing the discharge port 28.

  The upper part of the CIS module 63 is covered by the upper surface 24 of the upper unit 301 regardless of the position of the discharge cover 25. Therefore, it is possible to suppress external light from entering the vicinity of the CIS module 63 from above. Further, since the left side surface 27 of the upper unit 301 extends in a direction perpendicular to the upper surface 24, when the discharge cover 25 is opened, light from above such as an indoor lamp in which the multifunction machine 1 is installed. Is suppressed from entering through the discharge port 28.

  A shielding film 91 is provided between the CIS module 63 and the discharge port 28 to block external light entering from the discharge port 28 toward the CIS module 63. Therefore, even if external light enters from the discharge port 28, it is possible to suppress external light from entering the vicinity of the CIS module 63, and consequently, it is possible to suppress a decrease in image reading accuracy due to the entrance of external light.

  One end of the shielding film 91 protrudes into the straight path 72 of the document conveyed toward the discharge port 28. Therefore, the document discharged from the discharge port 28 is pressed by one end of the shielding film 91. As a result, the document discharged from the discharge port 28 can be prevented from dropping, and the document can be discharged satisfactorily.

  An upper surface 77U of the straight guide member 77 is provided facing the straight path 72.

  Thereby, the distance between the CIS module 63 and the discharge port 28 can be secured to some extent. As a result, it is possible to further suppress external light from entering the vicinity of the CIS module 63.

  A flapper 78 is provided between the CIS module 63 and the discharge port 28 so as to be displaceable between a first position where the straight path 72 is formed and a second position where the U-turn path 71 is formed. The flapper 78 communicates between the CIS module 63 and the discharge port 28 in a state where the flapper 78 is located at the first position, guides the document to the straight path 72, and is disposed in the second position with the CIS module 63. It is configured to block the space between the discharge port 28 and guide the document to a U-turn path 71 different from the straight path 72. The base end portion 92 of the shielding film 91 is fixed to the flapper 78.

  Since the base end portion 92 of the shielding film 91 is fixed to the flapper 78, when the flapper 78 is displaced from the second position to the first position, the shielding film 91 is displaced accordingly. Thereby, according to the position of the flapper 78, the shielding film 91 can be arrange | positioned in the position where external light is shielded favorably. Therefore, in the state where the flapper 78 is disposed at the first position, the CIS module 63 and the discharge port 28 communicate with each other, and the external light easily enters the CIS module 63, but the external light is shielded. It can be shielded by the film 91 and the entry of external light into the vicinity of the CIS module 63 can be suppressed.

  Further, the shielding film 91 is provided in a state straddling the flapper 78 and the upper surface 77U of the straight guide member 77.

  Therefore, the straight path 72 can be blocked by the shielding film 91 between the flapper 78 and the upper surface 77U of the straight guide member 77.

  The straight path 72 is a path through which a document can be conveyed while suppressing the curvature of the document compared to the U-turn path 71.

  The smaller the curvature of the straight path 72, that is, the closer the straight path 72 is to a straight line, the easier it is for external light entering from the outlet 28 to reach the CIS module 63. However, a shielding film 91 is provided at a position where the straight path 72 is shielded. Therefore, it is possible to suppress external light from reaching the vicinity of the CIS module 63.

  A second contact glass 62 is disposed between the discharge port 28 and the first contact glass 61. Above the second contact glass 62, a CIS module 68 for reading an image of a document is disposed.

  While the document is being conveyed through the common path 44, the lower surface thereof contacts the first contact glass 61 and the upper surface contacts the second contact glass 62.

  As a result, the images on both the upper surface and the lower surface of the original can be read during one conveyance of the original.

  The CIS module 68 is fixed at a position facing the second contact glass 62.

In the configuration in which the CIS module 68 is movably provided, for example, in order to acquire correct white data, the CIS module 68 is moved to a position that is not easily affected by external light, and the white reference is read by the CIS module 68. Conceivable. However, since the shielding film 91 is provided, even if the CIS module 68 is fixed, it is possible to prevent external light from entering the vicinity of the CIS module 68. As a result, the white reference can be accurately read by the CIS module 68, and correct white data can be acquired.
<Modification>

  Instead of the shielding film 91 shown in FIGS. 5 and 6, a shielding film 95 shown in FIGS. 7 and 8 may be used.

  The shielding film 95 is made of a rectangular film sheet that extends long in one direction. The shielding film 95 is mountain-folded with a fold line extending at an interval from one end edge and the other end edge along the longitudinal direction. Then, the outer surface of the base end portion 96 on one end edge side with respect to one broken line in the shielding film 95 is attached to the attaching surface 80 opposite to the curved surface 79 of the flapper 78 using a double-sided tape. In the state where the flapper 78 is disposed at the first position, as shown in FIG. 7, the bent portion 97 as an example of a corner portion on the other end edge side of the shielding film 95 protrudes into the straight path 72, 72 is in contact with the upper surface 77U of the straight guide member 77. Further, in the state where the flapper 78 is disposed at the second position, as shown in FIG. 8, the portion of the shielding film 95 between the one end portion 96 and the bent portion 97 extends substantially along the straight path 72. .

  According to this structure, since the film-shaped member is doubled, external light can be shielded better. Therefore, it is possible to further suppress external light from entering the vicinity of the CIS module 63.

  Further, the film sheet is bent into a V-shape, so that the film sheet is bent. Therefore, the document discharged from the discharge port 28 can be favorably pressed by the bent portion 97 of the shielding film 95.

  Further, since the bent portion 97 is formed by bending the film sheet into a V-shape, the bent portion 97 does not have fine irregularities such as a cutting trace. Therefore, when the bent portion 97 rubs against the document conveyed on the straight path 72, it is possible to prevent the document from being scratched.

  7 and 8 show a configuration in which a tip end 98 that is a portion on the tip end side of the bent portion 97 in the shielding film 95 is a free end portion. However, a groove may be formed on the affixing surface 80 of the flapper 78, and the leading end 98 of the shielding film 95 may be movably inserted into the groove. In the case of this configuration, the leading end portion of the shielding film 95 moves in the groove according to the thickness of the document, so that an appropriate force that does not hinder the conveyance of the document from the bent portion 97 of the shielding film 95 is applied. can do.

  As mentioned above, although one Embodiment of this invention was described, this invention can also be implemented with another form.

  Although the flapper 78 is arranged in the upper unit 301, it may be attached to the lower unit 302. In this case, the flapper 78 is fixedly arranged with respect to the straight path 72 regardless of the displacement of the upper unit 301. Therefore, the position of the flapper 78 can be kept stable.

  For example, the first contact glass 61 and the second contact glass 62 are not limited to glass plates, and may be formed of a transparent plate other than a glass plate, such as a transparent resin plate.

  Further, although the configuration in which the left end portion 61L of the first contact glass 61 is an example of a contact surface is taken up, the first contact glass 61 is formed in the same size as the first document pressing member 66 in a plan view, and the first contact glass 61 is formed. A transparent plate as an example of a contact surface may be provided adjacent to the left side of the glass 61.

  In addition, the left end edge of the upper surface 24 of the upper unit 301 (the left end edge of the maintenance cover 23) and the upper end edge of the left side surface 27 are abutted, that is, the left side surface 27 of the upper unit 301 extends in a direction orthogonal to the upper surface 24. However, the configuration is not limited to orthogonal, and it is only necessary to intersect at an angle close to orthogonal. Further, the upper surface 24 and the left side surface 27 may be continuous via a curved surface or an inclined surface. In this case, for example, if the plane that constitutes most of the upper surface 24 and the plane that constitutes most of the left side surface 27 intersect at an angle or an angle close to orthogonal, the same effect as the present embodiment is obtained. Play.

  In the above-described embodiment, the image reading unit 300 is combined with the image forming unit 200, and these constitute the multifunction peripheral 100. However, the image reading unit 300 may constitute a scanner by itself.

  In addition, the configuration in which the shielding film 95 is composed of one rectangular film sheet is taken up, but the shielding film 95 having the shape described in the above embodiment is formed by a plurality of film sheets arranged in the front-rear direction. Also good.

  Furthermore, the shielding film 95 is not limited to one position, and may be provided at a plurality of positions separated in the left-right direction.

  In addition, various design changes can be made to the above-described configuration within the scope of the matters described in the claims.

24 upper surface 25 discharge cover 27 left side 47 first LF roller 48 driven roller 49 second LF roller 50 driven roller 51 driven roller 61 first contact glass 61L left end 62 second contact glass 63 CIS module 68 CIS module 71 U-turn path 72 straight path 77U Upper surface 78 Flapper 91 Shielding film 92 Base end portion 93 Front end portion 95 Shielding film 96 Base end portion 97 Bent portion 300 Image reading unit

Claims (10)

A transport section for transporting a document;
A cover that covers the transport section;
A reading unit that reads an image of a document conveyed by the conveyance unit;
An opening / closing part provided on the cover so as to be displaceable between an open position for opening a discharge port through which the document conveyed by the conveyance unit is discharged and a closed position for closing the discharge port;
A guide surface that is provided between the transport unit and the discharge port and extends along a first transport path of a document transported toward the discharge port by the transport unit and guides the document toward the discharge port. When,
Projecting the first conveyance path, wherein the closing part shielding portion and the opening and closing unit to shield the external light entering toward the reading portion from the discharge port when positioned in the open position is located at the open position An image reading apparatus, comprising: a shielding film having a contact portion that sometimes contacts the guide surface . Before SL contact portion, Ru corners der formed by bending into a V-shape the shielding film, the image reading apparatus according to claim 1.   A transport section for transporting a document;
  A cover that covers the transport section;
  A reading unit that reads an image of a document conveyed by the conveyance unit;
  An opening / closing part provided on the cover so as to be displaceable between an open position for opening a discharge port through which the document conveyed by the conveyance unit is discharged and a closed position for closing the discharge port;
  One end portion is disposed between the reading unit and the discharge port, the one end portion projects into the first conveyance path of the document conveyed toward the discharge port by the conveyance unit, and the opening / closing unit is located at the open position. Sometimes, a shielding unit that shields external light entering from the discharge port toward the reading unit,
  A guide unit provided between the reading unit and the discharge port and displaceable between a first position and a second position different from the first position;
  In the state where the guide unit is located at the first position, the guide unit communicates between the reading unit and the discharge port, guides the document to the first conveyance path, and is located at the second position. It is configured to block between the reading unit and the discharge port and guide the document to a second transport path different from the first transport path,
  The image reading apparatus, wherein the other end portion of the shielding portion opposite to the one end portion is fixed to the guide portion.   The shielding portion has a V shape formed by bending a single film-like member,
  The image reading apparatus according to claim 3, wherein the one end portion of the shielding portion is a corner portion of the V-shaped film-like member and protrudes into the first conveyance path. A contact surface disposed facing the reading unit and in contact with a document conveyed by the conveyance unit;
The cover includes a first surface located above the reading unit and the contact surface, and a second surface extending in a direction intersecting both the contact surface and the first surface,
The closing part, the are formed on the second surface, the image reading apparatus according to any one of claims 1-4. A placement surface on which the document is placed;
The cover is provided to be displaceable at a position covering the mounting surface and a position opening the mounting surface,
The transport unit is provided on the cover,
The reading unit moves along the mounting surface, and reads the image of the document placed on the mounting surface, stops at a fixed position, and is transported by the transport unit. With the second reading method for reading the document image, the document image can be read.
The cover includes a first surface located above the placement surface, and a second surface extending in a direction intersecting both the placement surface and the first surface,
The closing part, the are formed on the second surface, the image reading apparatus according to any one of claims 1-4. 4. The image reading apparatus according to claim 3 , wherein the first conveyance path is a path through which the original can be conveyed while suppressing the curvature of the original more than the second conveyance path. 5. A second reading unit which is provided between the reading unit and the discharge port and reads an image of a document conveyed by the conveying unit;
The image reading apparatus according to claim 5 , further comprising a second contact surface that is disposed to face the second reading unit and contacts a document that is conveyed by the conveying unit. The contact surface is in contact with one side of the document;
The image reading apparatus according to claim 8 , wherein the second contact surface is in contact with the other surface opposite to the one surface of the document. The second reading unit is fixed to a position opposed to the second contact surface, the image reading apparatus according to claim 8 or 9.

Images