JP2015156622A - Image reading device - Google Patents

Abstract

An image reading apparatus capable of realizing downsizing in a direction perpendicular to a document support surface is provided. A body portion or an opening / closing portion extends so as to contact a first surface SH1 of a sheet SH passing through an inclined portion PB11 of a lower path PB1 in a state where the opening / closing portion 9 is in a closed position. The inclined portion PB11 includes a guide portion 160 that forms a guide surface 166 that guides the sheet SH. The second reading unit 3A is disposed obliquely downward along the inclined portion PB11 at a position facing the guide surface 166 from above in a state where the opening / closing unit 9 is in the closed position. The guide portion 160 is formed with a recess 170 that is recessed downward from the guide surface 166. In the recess 170, a pressing member 149 that is held so as to be able to contact the first surface SH1 of the sheet SH that passes through the inclined portion PB11, and a biasing member 149S that biases the pressing member 149 toward the second reading unit 3A. And are provided. [Selection] Figure 5

Description

  The present invention relates to an image reading apparatus.

  Patent Document 1 discloses an example of a conventional image reading apparatus. The image reading apparatus includes a main body unit, an opening / closing unit, a transport unit, a first reading unit, and a second reading unit.

  The main body includes a document support surface on the upper surface that supports a document to be read. The opening / closing part is supported by the main body so as to be displaceable between a closed position that covers the document support surface and an open position that exposes the document support surface. The transport unit is provided in the opening / closing unit. The transport unit defines a transport path for transporting the sheet, including an upper path, a lower path positioned below the upper path, and a curved path connecting the upper path and the lower path. . The conveying unit is configured to convey the sheet from the upper path to the lower path via the curved path.

  The first reading unit is accommodated in the main body. The first reading unit has a reading surface disposed upward along the document support surface. Thus, the first reading unit is configured to read the image of the document supported on the document support surface while moving. The first reading unit stops at the fixed reading position facing the sheet conveyed from the lower side in the state where the opening / closing unit is in the closed position, and the image of the first surface facing the lower side of the sheet Is configured to read.

  The second reading unit is accommodated in the opening / closing unit. The second reading unit is positioned on the upper side with respect to the first reading unit stopped at the fixed reading position, and the reading surface is disposed upward along the upper path. In addition, a pressing member that can contact the sheet passing through the upper path and a biasing member that biases the pressing member toward the second reading unit are provided above the second reading unit with the upper path interposed therebetween. It has been. In this way, the second reading unit reads an image on the second surface facing the side opposite to the first surface of the sheet conveyed along the upper path.

Japanese Patent No. 5126270

  In the conventional image reading apparatus, the first reading unit, the second reading unit, the pressing member, and the urging member that are stopped at the fixed reading position are arranged in a direction perpendicular to the document support surface. For this reason, in this image reading apparatus, the size of the apparatus tends to increase in the direction perpendicular to the document support surface.

  SUMMARY An advantage of some aspects of the invention is that it provides an image reading apparatus that can be downsized in a direction perpendicular to a document support surface.

An image reading apparatus according to the present invention includes a main body having a document support surface on the upper surface for supporting a document to be read;
An opening / closing part supported by the main body part so as to be displaceable between a closed position covering the original document supporting surface and an open position exposing the original document supporting surface;
Conveyance for conveying sheets including an upper path, a lower path positioned below the upper path, and a curved path connecting the upper path and the lower path, provided in the opening / closing section. A conveying unit configured to convey a sheet from the upper path to the lower path via the curved path;
An image of a document housed in the main body and supported on the document support surface is read while moving, and the sheet conveyed in the lower path is moved from the lower side when the opening / closing unit is in the closed position. A first reading unit configured to stop at an opposing fixed reading position and read an image of a first surface facing the lower side of the sheet;
An image reading apparatus comprising: a second reading unit configured to read an image on a second surface of the sheet that is accommodated in the opening / closing unit and that is conveyed on the conveyance path and facing the first surface. There,
The lower path has an inclined part that inclines downward from the curved path toward the first reading unit that stops at the fixed reading position,
The main body part or the opening / closing part extends so as to be able to come into contact with the first surface of the sheet passing through the inclined part from below when the opening / closing part is in the closed position. Having a guide portion forming a guide surface for guiding
The second reading unit is disposed at a position facing the guide surface from above in a state where the opening / closing unit is in the closed position, and the reading surface is disposed obliquely downward along the inclined unit,
The guide portion is formed with a recess that is recessed downward from the guide surface.
The concave portion is provided with a pressing member that is held so as to be able to contact the first surface of the sheet that passes through the inclined portion, and a biasing member that biases the pressing member toward the second reading portion. It is characterized by being.

  In the image reading apparatus of the present invention, the inclined portion of the lower path is inclined downward from the curved path toward the first reading section that stops at the fixed reading position. The second reading unit has a reading surface disposed obliquely downward along the inclined portion. The pressing member and the urging member are provided in a concave portion that is recessed downward from the guide surface that guides the sheet in the inclined portion. As a result, the second reading unit is shifted laterally with respect to the first reading unit stopped at the fixed reading position. Further, the pressing member and the urging member are displaced laterally with respect to the first reading unit stopped at the fixed reading position with respect to the second reading unit. That is, in this image reading apparatus, the first reading unit, the second reading unit, the pressing member, and the urging member stopped at the fixed reading position are in a positional relationship such that they do not overlap when viewed from the direction perpendicular to the document support surface.

  Therefore, in the image reading apparatus of the present invention, it is possible to reduce the size in the direction perpendicular to the document support surface.

  It is desirable that the guide portion is provided on the main body portion and is formed so as to protrude above the document support surface of the main body portion. In this case, in this image reading apparatus, since the pressing member and the urging member are provided in the concave portion of the guide portion formed on the main body side, the opening / closing portion can be easily reduced in weight. Further, in this image reading apparatus, since the inclined portion of the lower path is opened while the opening / closing portion is in the open position, it is easy to remove the jammed sheet. Further, in this image reading apparatus, since the pressing member is exposed in a state where the opening / closing portion is in the open position, it is easy to clean the pressing member and its surroundings.

  The image reading apparatus of the present invention desirably has a gap between the inner wall surface defining the recess and the edge of the pressing member. According to this configuration, dust or the like adhering to the sheet passing through the inclined portion is likely to fall into the recess from the gap between the inner wall surface that defines the recess and the edge of the pressing member. For this reason, in this image reading apparatus, it can suppress that the dust etc. accumulate in the circumference | surroundings of a 2nd reading part, or penetrate | invade into the 1st reading part side. As a result, in this image reading apparatus, it is possible to suppress deterioration in reading quality of the first and second reading units.

  It is desirable that the guide surface includes an inclined guide surface that is adjacent to an edge located on the side closer to the fixed reading position among the edges of the pressing member and is inclined downward toward the fixed reading position. According to this configuration, the inclined guide surface can satisfactorily guide the sheet from the pressing member side to the first reading unit side stopped at the fixed reading position.

  The inclined guide surface is preferably formed by upper end edges of a plurality of ribs arranged at intervals along the longitudinal direction of the first reading unit and protruding upward. According to this configuration, since the contact area between the inclined guide surface formed by the upper end edges of the plurality of ribs and the sheet is reduced, the sheet conveyance resistance can be reduced.

  It is desirable that the guide portion has a first wall portion that extends along the longitudinal direction while intersecting with each rib and protrudes upward. According to this structure, it can suppress that dust etc. penetrate | invade between the ribs and penetrate | invade into the fixed reading position side by the 1st wall part.

  As for a guide part, it is desirable to have the 2nd wall part extended toward the press member side from the both ends of the longitudinal direction in a 1st wall part. According to this configuration, dust or the like that is dammed to the first wall can be enclosed by the second wall, so that it is possible to reliably prevent dust and the like from entering the fixed reading position.

  It is desirable that a holding portion that detachably holds the pressing member is provided in the recess. According to this configuration, the pressing member can be easily replaced. Moreover, when the main body has a guide part, the surroundings can be easily cleaned by removing the pressing member with the opening / closing part in the open position.

The image reading apparatus according to the present invention conveys a sheet including an upper path, a lower path positioned below the upper path, and a curved path connecting the upper path and the lower path. A conveying section that defines a conveying path, and is configured to convey a sheet from the upper path to the lower path via the curved path;
A first reading unit configured to read an image of a first surface facing a sheet conveyed in the lower path from below and facing the lower side of the sheet;
An image reading apparatus comprising: a second reading unit configured to read an image on a second surface facing a side opposite to the first surface of the sheet conveyed in the conveyance path;
The lower path includes an inclined portion that is inclined downward from the curved path toward the first reading unit side,
A guide portion that extends from the lower side so as to contact the first surface of the sheet passing through the inclined portion, and that forms a guide surface that guides the sheet in the inclined portion;
The second reading unit is disposed at a position facing the guide surface from above, and the reading surface is disposed obliquely downward along the inclined portion.
The guide portion is formed with a recess that is recessed downward from the guide surface.
The concave portion is provided with a pressing member that is held so as to be able to contact the first surface of the sheet that passes through the inclined portion, and a biasing member that biases the pressing member toward the second reading portion. And
A gap is provided between an inner wall surface defining the recess and an edge of the pressing member.

  In the image reading apparatus of the present invention, the inclined portion of the lower path is inclined downward from the curved path toward the first reading section. The second reading unit has a reading surface disposed obliquely downward along the inclined portion. The pressing member and the urging member are provided in a concave portion that is recessed downward from the guide surface that guides the sheet in the inclined portion. Accordingly, the second reading unit is shifted laterally with respect to the first reading unit. Further, the pressing member and the biasing member are shifted in the lateral direction with respect to the first reading unit with respect to the second reading unit. That is, in this image reading apparatus, the first reading unit, the second reading unit, the pressing member, and the urging member are in a positional relationship that does not overlap when viewed from the direction perpendicular to the document support surface.

  Therefore, in the image reading apparatus of the present invention, it is possible to reduce the size in the direction perpendicular to the document support surface. Further, in this image reading apparatus, dust or the like adhering to the sheet passing through the inclined portion easily falls into the recess from the gap between the inner wall surface defining the recess and the edge of the pressing member. For this reason, in this image reading apparatus, it can suppress that the dust etc. accumulate in the circumference | surroundings of a 2nd reading part, or penetrate | invade into the 1st reading part side. As a result, in this image reading apparatus, it is possible to suppress deterioration in reading quality of the first and second reading units.

  It is desirable that the guide surface includes an inclined guide surface that is adjacent to an edge located on the first reading unit side among the end edges of the pressing member and is inclined downward toward the first reading unit side. The inclined guide surface is preferably formed by upper end edges of a plurality of ribs arranged at intervals along the longitudinal direction of the first reading unit and protruding upward. The guide portion extends along the longitudinal direction while intersecting each rib, and protrudes upward, and the second wall extends from both longitudinal ends of the first wall portion toward the pressing member. It is desirable to have a part.

  In this case, in this image reading apparatus, the sheet can be satisfactorily guided from the pressing member side to the first reading unit side by the inclined guide surface. Further, in this image reading apparatus, since the contact area between the inclined guide surface formed by the upper end edges of the plurality of ribs and the sheet is reduced, the sheet conveyance resistance can be reduced. Further, in this image reading apparatus, dust or the like can be dammed between the ribs by the first wall portion, and the dammed dust or the like can be enclosed by the second wall portion, so that the dust or the like is the first wall portion. Intrusion into the reading unit side can be reliably suppressed.

1 is a perspective view of an image reading apparatus according to an embodiment. 1 is a schematic side view of an image reading apparatus according to an embodiment. 1 is a perspective view illustrating an opening / closing unit and the like in an open position according to an image reading apparatus of an embodiment. 1 is a schematic partial cross-sectional view of an image reading apparatus according to an embodiment. 1 is a schematic partial cross-sectional view of an image reading apparatus according to an embodiment. FIG. 4 is a partial perspective view showing an enlarged view of the periphery of a guide portion and a pressing member in the main body portion shown in FIG. 3 according to the image reading apparatus of the embodiment. FIG. 4 is an enlarged partial perspective view illustrating a periphery of a second reading unit in the opening / closing unit illustrated in FIG. 3 according to the image reading apparatus of the embodiment. FIG. 7 is a partial perspective view illustrating a state where the pressing member is removed from FIG. 6 according to the image reading apparatus of the embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(Example)
As shown in FIG. 1, an image reading apparatus 1 according to the embodiment is an example of a specific mode of the image reading apparatus according to the present invention. In FIG. 1, the side on which the operation panel 8P is provided is defined as the front side of the apparatus, and the side that comes to the left hand when facing the operation panel 8P is defined as the left side, and the front, rear, left, and right directions are displayed. . 2 are displayed in correspondence with the directions shown in FIG. 1. Hereinafter, each component provided in the image reading apparatus 1 will be described with reference to FIG.

<Configuration>
As shown in FIGS. 1 to 4, the image reading apparatus 1 includes a main body unit 8, an opening / closing unit 9, an image forming unit 5, a reading unit 3, and a conveying unit 4. The main body 8 is a flat substantially box-shaped body. As shown in FIG. 1, an operation panel 8 </ b> P such as a touch panel is provided on the front surface of the main body 8.

  As shown in FIG. 2, the image forming unit 5 is accommodated in the lower portion of the main body 8. The image forming unit 5 forms an image on a sheet by an ink jet method or a laser method.

  As shown in FIGS. 3 to 6, a first platen glass 81, a second platen glass 82, and a frame body 8 </ b> W are disposed on the upper surface of the main body 8.

  A document support surface 81 </ b> A is formed by the upper surface of the first platen glass 81. The document support surface 81A supports the document from the lower side in a stationary state when the image of the document to be read is read while the reading unit 3 moves. Documents to be read include books, in addition to sheets such as paper and OHP sheets.

  The second platen glass 82 is located on the left side of the first platen glass 81 and extends in the longitudinal direction. A reading surface 82 </ b> A is formed by the upper surface of the second platen glass 82. The reading surface 82A guides the conveyed sheet SH from below when the reading unit 3 reads an image of the sheet SH conveyed one by one by the conveying unit 4.

  The frame 8W is a resin molded product manufactured by injection molding of a thermoplastic resin or the like. The frame 8W surrounds the first platen glass 81 and the second platen glass 82 in a frame shape. A guide portion 160 described later is provided on the left side of the second platen glass 82 in the frame 8W.

  As shown in FIG. 1, the opening / closing part 9 is supported by a hinge (not shown) provided at the upper rear edge of the main body part 8 so as to be swingable around an opening / closing axis X9 extending in the left-right direction. In the closed position shown in FIGS. 1, 2, 4 and 5, the opening / closing unit 9 covers the document support surface 81A from above. The opening / closing part 9 is displaced to the open position shown in FIGS. 3 and 7 by swinging around the opening / closing axis X9 so that the front end side is displaced upward and backward. The opening / closing unit 9 exposes the document support surface 81A at the open position. As a result, the user can support the document to be read on the document support surface 81A.

  As shown in FIGS. 2 and 3, the reading unit 3 includes a reading sensor 3 </ b> B accommodated in the upper portion of the main body 8, a scanning mechanism (not shown), and a reading sensor 3 </ b> A accommodated in the opening / closing unit 9. doing.

  The reading sensor 3B is an example of the “first reading unit” in the present invention. The reading sensor 3A is an example of the “second reading unit” in the present invention. As the reading sensors 3A and 3B, known image reading sensors such as CIS (Contact Image Sensor) and CCD (Charge Coupled Device) are employed. As shown in FIG. 3, the reading sensor 3B extends in the front-rear direction, and a plurality of light receiving elements (not shown) are arranged in a row on the upper surface side. The longitudinal direction, which is the longitudinal direction of the reading sensor 3B, is an example of the “longitudinal direction of the first reading unit” in the present invention.

  The reading sensor 3B is located below the document support surface 81A and the reading surface 82A. A scanning mechanism (not shown) reciprocates the reading sensor 3B in the left-right direction below the document support surface 81A in the main body 8 when reading an image of the document supported on the document support surface 81A. A scanning mechanism (not shown) stops the reading sensor 3B at a fixed reading position below the reading surface 82A in the main body 8 when the reading sensor 3B reads an image of the sheet SH conveyed by the conveying unit 4. .

  As will be described later, the reading sensor 3 </ b> A is disposed in the middle of the transport path P <b> 1 in the opening / closing unit 9. As shown in FIG. 5, the reading sensor 3 </ b> A faces the conveyance path P <b> 1 through the third platen glass 83. Similarly to the reading sensor 3B, the reading sensor 3A extends from the front side of the sheet of FIG. 5 to the back side of the sheet, that is, in the front-rear direction. The reading surface 83A of the third platen glass 83 guides the conveyed sheet SH from above when the reading sensor 3A reads an image of the sheet SH conveyed by the conveying unit 4.

  As shown in FIGS. 2, 4, and 5, the transport unit 4 is provided in the opening / closing unit 9. The transport unit 4 includes a supply tray 91 and a discharge tray 92. As shown in FIGS. 1 and 2, the supply tray 91 is formed on the right side portion of the opening / closing section 9 by developing a cover 9 </ b> C supported on the upper surface side of the opening / closing section 9 so as to be opened and closed. The discharge tray 92 is located below the supply tray 91.

  As shown in FIG. 4, the supply tray 91 supports the sheet SH to be read conveyed by the conveyance unit 4 from below. A surface facing the upper side of the sheet SH supported by the supply tray 91 is defined as a first surface SH1. A surface facing the lower side of the sheet SH supported by the supply tray 91, that is, a surface facing the opposite side to the first surface SH1, is defined as a second surface SH2. Images are read onto the discharge tray 92 by the reading sensors 3 </ b> A and 3 </ b> B, and the sheet SH conveyed by the conveyance unit 4 is discharged. When the sheet SH is discharged to the discharge tray 92, the first surface SH1 faces downward and the second surface SH2 faces upward.

  As shown in FIGS. 4 and 5, the transport unit 4 includes a first chute member 110, a second chute member 120, a first cover member 130, and a second cover member 140. The transport unit 4 is formed on the first chute member 110, the second chute member 120, the first cover member 130, and the second cover member 140, and is formed on the first surface SH1 or the second surface SH2 of the sheet SH within the opening / closing unit 9. A transport path P1 shown in FIGS. 2, 4 and 5 is defined as a space surrounded by a plurality of guide surfaces extending so as to be capable of contacting. The conveyance path P1 includes an upper path PA1, a lower path PB1, and a curved path PC1.

  The upper path PA <b> 1 extends from the supply tray 91 to the left end side of the opening / closing part 9. The upper path PA1 is inclined downward at a portion continuing to the supply tray 91, and is inclined upward at a position between a supply roller 41 and a separation roller 42 described later.

  The lower path PB1 is located below the upper path PA1. The lower path PB <b> 1 extends from the left end side of the opening / closing part 9 to the discharge tray 92. The lower path PB1 is inclined downward from the left end side of the opening / closing portion 9 so as to approach the reading surface 82A, extends substantially horizontally along the reading surface 82A, and then upwardly inclined toward the discharge tray 92. ing.

  The curved path PC1 is curved so as to swell leftward, and connects the left end of the upper path PA1 and the left end of the lower path PB1.

  The lower path PB1 has a first inclined part PB11 and a second inclined part with a part extending substantially horizontally to the right side along the reading surface 82A, that is, a predetermined part positioned below the curved path PC1 as a reference part PB10. PB12. The first inclined portion PB11 is an example of the “inclined portion” in the present invention.

  The first inclined portion PB11 is inclined downward from the lower path PB1 so as to approach the reading surface 82A from the left end side of the opening / closing section 9, that is, from the curved path PC1 toward the reference portion PB10. Part.

  The second inclined portion PB12 is a portion of the lower path PB1 that is inclined upward from the reading surface 82A toward the discharge tray 92, that is, a portion that is inclined upward from the reference portion PB10 toward the opposite side of the curved path PC1. is there.

  The transport unit 4 transports the sheet SH from the upper path PA1 to the lower path PB1 via the curved path PC1 in the transport path P1. The conveyance direction of the sheet SH in the conveyance path P1 is leftward in the upper path PA1, is changed from leftward to the right in the curved path PC1, and is rightward in the lower path PB1. In the transport path P1, the right end side of the upper path PA1 is the upstream side in the transport direction, and the right end side of the lower path PB1 is the downstream side in the transport direction.

  Specific configurations of the first chute member 110, the second chute member 120, the first cover member 130, and the second cover member 140 that define the transport path P1 will be described.

  As shown in FIGS. 4 and 5, the first chute member 110, the second chute member 120, the first cover member 130, and the second cover member 140 are each a resin molded product manufactured by, for example, injection molding of a thermoplastic resin. It is.

  The first chute member 110 extends in the front-rear direction and the left-right direction. The right portion of the upper surface of the first chute member 110 is connected to the left end edge of the upper surface of the deployed cover 9C and is inclined downward to the left, and the left portion of the upper surface of the first chute member 110 is the left end portion of the opening / closing portion 9. Inclined to the left to the side. The upper surface of the first chute member 110 forms a first guide surface 111 that defines the upper path PA1. The first guide surface 111 extends so as to be in contact with the second surface SH2 of the sheet SH conveyed on the upper path PA1, and guides the sheet SH from below in the upper path PA1.

  At the left end portion of the first chute member 110, an upper curved surface 116 that is curved so as to draw an arc that changes from the left to the bottom is formed. The upper curved surface 116 defines the upper part of the curved path PC1. The upper curved surface 116 extends so that the upper portion of the curved path PC1 can contact the second surface SH2 of the sheet SH being conveyed, and guides the sheet SH from the lower side and the right side in the upper portion of the curved path PC1.

  The second chute member 120 extends in the front-rear direction and the left-right direction. The second chute member 120 is assembled to the first chute member 110 from below. At the left end portion of the second chute member 120, a lower curved surface 126 that is curved so as to draw an arc that changes from downward to right is formed. The lower curved surface 126 defines the lower portion of the curved path PC1. The lower curved surface 126 extends so as to be able to come into contact with the second surface SH2 of the sheet SH conveyed along the lower portion of the curved path PC1, and guides the sheet SH from the right side and the upper side in the lower portion of the curved path PC1. To do.

  As shown in FIGS. 4, 5, and 7, the lower surface of the second chute member 120 is connected to the lower curved surface 126 and is inclined downward toward the right. The second chute member 120 forms a second guide surface 122 that defines the first inclined portion PB11 of the lower path PB1 by the lower surface thereof. The second guide surface 122 extends so as to be able to contact the second surface SH2 of the sheet SH conveyed through the first inclined portion PB11, and guides the sheet SH from the upper side in the first inclined portion PB11.

  As shown in FIGS. 4 and 5, the second chute member 120 has a reading sensor holding part 129. The reading sensor holding part 129 is recessed from the second guide surface 122 to the upper side and the right side, that is, toward the upper path PA1. The reading sensor holding unit 129 holds the reading sensor 3A therein. The reading sensor holding unit 129 is closed by the third platen glass 83.

  The reading surface 83A of the third platen glass 83 is inclined downward to the right along the first inclined portion PB11. The reading surface 83A, together with the second guide surface 122, defines the first inclined portion PB11. The reading surface 3AA of the reading sensor 3A is disposed in parallel with the reading surface 83A of the third platen glass 83, that is, obliquely downward along the first inclined portion PB11.

  The reading surface 3AA of the reading sensor 3A faces the first inclined portion PB11 via the reading surface 83A of the third platen glass 83. As shown in FIG. 7, the second guide surface 122 is formed by a lower edge of the plurality of ribs 122 </ b> R at a portion downstream of the reading surface 83 </ b> A of the third platen glass 83 in the transport direction.

  As shown in FIGS. 4, 5, and 7, a pressing member 49 is held on the lower surface of the second chute member 120. The pressing member 49 is located adjacent to the second guide surface 122 from the right side, and faces the reading surface 82A from the upper side.

  As shown in FIGS. 4 and 5, a compression coil spring 49 </ b> S is disposed between the second chute member 120 and the pressing member 49. The compression coil spring 49S biases the pressing member 49 toward the reading surface 82A. The lower surface of the pressing member 49 defines the reference portion PB10 of the lower path PB1. The lower surface of the pressing member 49 extends so as to be in contact with the second surface SH2 of the sheet SH conveyed through the reference portion PB10, and guides the sheet SH from the upper side in the reference portion PB10.

  As shown in FIGS. 4, 5, and 7, the lower surface of the second chute member 120 is inclined upward to the right from a position adjacent to the pressing member 49 from the right side. The lower surface of the second chute member 120 forms a third guide surface 123 that defines the second inclined portion PB12 of the lower path PB1. The third guide surface 123 extends so as to be able to contact the second surface SH2 of the sheet SH conveyed through the second inclined portion PB12, and guides the sheet SH from the upper side in the second inclined portion PB13.

  As shown in FIGS. 4 and 5, the first cover member 130 is assembled to the first chute member 110 from the upper side. The first cover member 130 extends in the front-rear direction and the left-right direction so as to cover the first chute member 110.

  A plurality of ribs 130 </ b> R are formed on the lower surface of the first cover member 130. Although not shown, the ribs 130R extend in the left-right direction with an interval in the front-rear direction. The lower end edge of each rib 130 </ b> R extends in the left-right direction along the first guide surface 111 while being spaced from the first guide surface 111 of the first chute member 110. And the lower end edge of each rib 130R is curving so that it may draw the circular arc which changes from the left direction to a downward direction, having a space | interval with the upper side curved surface 116 of the 1st chute | shoot member 110. FIG.

  The first cover member 130 forms a fourth guide surface 134 by the lower end edge of each rib 130R. The fourth guide surface 134 defines an upper portion of the upper path PA1 and the curved path PC1. The fourth guide surface 134 extends so as to be able to contact the first surface SH1 of the sheet SH conveyed along the upper portion of the upper path PA1 and the curved path PC1, and the sheet SH in the upper portion of the upper path PA1 and the curved path PC1. Is guided from the upper side and the left side.

  The second cover member 140 is assembled to the first chute member 110 and the second chute member 120 from below. The second cover member 140 extends in the front-rear direction and the left-right direction. As shown in FIG. 3, the lower surface of the opening / closing part 9 is formed by the lower surface of the second cover member 140. As shown in FIG. 4, the upper surface of the right portion of the second cover member 140 is a discharge tray 92. As shown in FIG. 3 to FIG. 5 and FIG. 7, a rectangular opening 140 </ b> H elongated in the front-rear direction is provided through the left side portion of the second cover member 140.

  As shown in FIGS. 4 and 5, the opening 140 </ b> H is located immediately above the reading surface 82 </ b> A in a state where the opening / closing part 9 is in the closed position, and faces the reading surface 82 </ b> A and the pressing member 49. Accordingly, the reading surface 82A defines the reference portion PB10 of the lower path PB1. The reading surface 82A extends so as to be able to contact the first surface SH1 of the sheet SH conveyed through the reference portion PB10, and guides the sheet SH from below in the reference portion PB10. In other words, the reference portion PB10 is set in a range including a position facing the fixed reading position where the reading sensor 3B reads the image of the sheet SH conveyed by the conveying section 4, that is, the position of the reading surface 82A. In other words, the first inclined portion PB11 that is inclined downward from the curved path PC1 toward the reference portion PB10 is inclined downward from the curved path PC1 toward the reading sensor 3B that stops at the fixed reading position.

  As shown in FIG. 7, the opening 140 </ b> H exposes the second guide surface 122 of the second chute member 120, the reading surface 83 </ b> A of the third platen glass 83, and the pressing member 49 in a state where the opening / closing part 9 is in the open position. . That is, in a state where the opening / closing part 9 is in the open position, the first inclined part PB11 and the reference part PB10 are opened by the opening 140H.

  As shown in FIGS. 4 and 5, in the second cover member 140, a fifth guide surface 145A is formed on the left side of the opening 140H. The fifth guide surface 145A is curved so as to draw an arc that changes from downward to right while having a space with the lower curved surface 126 of the second chute member 120, and reaches the opening 140H.

  The fifth guide surface 145A defines the lower portion of the curved path PC1. The fifth guide surface 145A extends so as to be in contact with the first surface SH1 of the sheet SH conveyed on the lower portion of the curved path PC1, and the first slope of the lower portion of the curved path PC1 and the lower path PB1. In the part PB11, the sheet SH is guided from the left side and the lower side.

  As shown in FIG. 4, in the second cover member 140, a fifth guide surface 145B is formed on the right side of the opening 140H. The fifth guide surface 145 </ b> B is inclined upward to the right and reaches the discharge tray 92 while being spaced from the third guide surface 123 of the second chute member 120.

  The fifth guide surface 145B defines the second inclined portion PB12 of the lower path PB1. The fifth guide surface 145B extends so as to contact the first surface SH1 of the sheet SH conveyed through the second inclined portion PB12 of the lower path PB1, and the sheet SH in the second inclined portion PB12 of the lower path PB1. Guide from below.

  As shown in FIGS. 3 to 6 and 8, the frame body 8 </ b> W of the main body portion 8 is provided with a guide portion 160 that defines the first inclined portion PB <b> 11 from the lower side. The guide portion 160 is integrally formed with the resin-made frame body 8W so as to protrude above the document support surface 81A and the reading surface 82A of the main body portion 8 from the portion of the frame body 8W on the left side of the second platen glass 82. Has been.

  More specifically, the guide portion 160 has a plurality of ribs 169 as shown in FIGS. 5, 6 and 8.

  The ribs 169 are arranged on the left side of the second platen glass 82 in the frame body 8W at intervals along the front-rear direction, which is the longitudinal direction of the reading sensor 3B. Each rib 169 protrudes upward and extends in the left-right direction. The upper edge 169D of each rib 169 is inclined downward to the right so that the left end is the highest and the right end reaches the reading surface 82A.

  As shown in FIG. 5, in a state where the opening / closing part 9 is in the closed position, each rib 169 of the guide part 160 passes through the opening 140 </ b> H, and an upper end edge 169 </ b> D of each rib 169 is the second guide surface of the second chute member 120. It faces 122 from below. The guide portion 160 forms a sixth guide surface 166 that guides the sheet SH by the upper end edge 169 </ b> D of each rib 169. The sixth guide surface 166 is an example of the “guide surface” in the present invention.

  The sixth guide surface 166 is inclined downward to the right and reaches the reading surface 82A while being spaced from the second guide surface 122 of the second chute member 120. The sixth guide surface 166 extends in the front-rear direction while being discontinuous between the ribs 169.

  The sixth guide surface 166 defines the first inclined portion PB11 of the lower path PB1 when the opening / closing portion 9 is in the closed position. The sixth guide surface 166 extends from the lower side so as to be able to contact the first surface SH1 of the sheet SH passing through the first inclined portion PB11 of the lower path PB1, and in the first inclined portion PB11 of the lower path PB1. The sheet SH is guided from below. In a state where the opening / closing part 9 is in the closed position, the reading sensor 3A faces the sixth guide surface 166 from above.

  As shown in FIGS. 5 and 8, an inner wall surface 170 </ b> E is formed by a side edge that slopes downward from the left edge of the upper edge 169 </ b> D of each rib 169. The inner wall surface 170E extends in the front-rear direction while being discontinuous between the ribs 169.

  A recess 170 is formed in the guide portion 160. The recess 170 is a space defined on the left side of the inner wall surface 170E, and is recessed downward from the sixth guide surface 166. In a state where the opening / closing part 9 is in the closed position, the recess 170 forms an empty space below and on the left side of the reading surface 83 </ b> A of the third platen glass 83.

  As shown in FIGS. 6 and 8, the concave portion 170 is provided with a pair of front and rear holding portions 180 and 180. As shown in FIGS. 5 and 8, the concave portion 170 is provided with a spring holding portion 189. The holding portions 180 and 180 and the spring holding portion 189 are also integrally formed with the frame body 8W.

  As shown in FIG. 8, each holding portion 180, 180 protrudes upward from the front end side and the rear end side of the recess 170. A shaft portion 180A is formed at the upper end of each holding portion 180, 180. Both shaft portions 180A protrude so as to approach each other. The spring holding portion 189 protrudes upward and rightward from an intermediate portion of the concave portion 170 in the front-rear direction.

  As shown in FIGS. 5 and 6, the recess 170 is provided with a pressing member 149 and a compression coil spring 149 </ b> S. The compression coil spring 149S is an example of the “biasing member” in the present invention.

  The pressing member 149 is a thin metal plate member extending in the front-rear direction. When the shaft portions 180A of the holding portions 180 and 180 shown in FIG. 8 are fitted into both end portions of the pressing member 149, the pressing member 149 is held by the holding portions 180 and 180 as shown in FIGS. Is done.

  As shown in FIG. 5, the upper surface of the pressing member 149 faces the third platen glass 83 and, together with the sixth guide surface 166, defines the first inclined portion PB11 of the lower path PB1. The sixth guide surface 166 is adjacent to the edge 149E located on the side close to the fixed reading position among the edges of the pressing member 149, and is inclined downward toward the reading surface 82A on the fixed reading position side. That is, the sixth guide surface 166 is also an “inclined guide surface” of the present invention. In the state where the opening / closing part 9 is in the closed position, the pressing member 149 extends so as to be able to contact the first surface SH1 of the sheet SH passing through the first inclined part PB11, and the first inclined part PB11 of the lower path PB1. Then, the sheet SH is guided from below.

  As shown in FIG. 5, the compression coil spring 149 </ b> S is attached to the spring holding portion 189 and abuts against the lower surface of the pressing member 149 to urge the pressing member 149 toward the third platen glass 83 and the reading sensor 3 </ b> A. .

  As shown in FIG. 8, the pressing member 149 can be removed from the holding portions 180 and 180 by bending and deforming at least one of the holding portions 180 and 180 and removing the shaft portion 180 </ b> A from both ends of the pressing member 149. it can. That is, each holding part 180, 180 holds the pressing member 149 in a detachable manner.

  As shown in FIGS. 5 and 6, a gap S <b> 1 is formed between the inner wall surface 170 </ b> E that defines the recess 170 and the edge 149 </ b> E that is located closer to the fixed reading position among the edges of the pressing member 149. Has been.

  As shown in FIGS. 5, 6, and 8, the guide portion 160 includes a first wall portion 161 and a pair of front and rear second wall portions 162 and 162. The first wall portion 161 and the second wall portions 162 and 162 are also integrally formed with the frame body 8W.

  The first wall portion 161 extends linearly along the front-rear direction while intersecting with each rib 169 and protrudes upward. The upper end edge of the first wall portion 161 is set lower than the upper end edge 169D of each rib 169. Thus, the first wall portion 161 does not interfere with the sheet SH guided by the sixth guide surface 166.

  As shown in FIG. 8, each of the second wall portions 162 and 162 extends to the left side from both ends in the front-rear direction of the first wall portion 161, that is, toward the pressing member 149 side. The front second wall portion 162 is connected to the front holding portion 180. The rear second wall portion 162 is connected to the rear holding portion 180.

  As shown in FIGS. 4 and 5, the transport unit 4 includes a supply roller 41, a separation roller 42, and a separation piece 43 at a position near the supply tray 91 in the upper path PA <b> 1.

  The supply roller 41 and the separation roller 42 are provided at positions facing the first guide surface 111 of the first chute member 110 from above. The separation roller 42 is assembled to a drive shaft 42S that extends in the front-rear direction. The separation roller 42 is a roller that rotates integrally with the drive shaft 42S.

  A holder 42F is swingably supported on the drive shaft 42S. The holder 42F protrudes to the right from the drive shaft 42S. The supply roller 41 is rotatably supported on the right side portion of the holder 42F. Although not shown, the holder 42F is provided with a transmission gear group (not shown) that transmits the rotational driving force from the drive shaft 42S to the supply roller 41.

  The separation piece 43 is provided in the first chute member 110 at a position facing the separation roller 42 from below. The separation piece 43 is a plate-like body made of a soft material such as rubber or elastomer. The separation piece 43 is fixed to the upper surface of a separation piece holder 43F that is swingably supported by the first chute member 110. A biasing spring 43S is disposed between the separation piece holder 43F and the first chute member 110. The urging spring 43S urges the separation piece holder 43F upward, whereby the separation piece 43 is pressed against the separation roller.

  The supply roller 41 rotates around an axis parallel to the drive shaft 42 </ b> S, applies a conveyance force to the sheet SH supported by the supply tray 91, and sends the sheet SH toward the separation roller 42. The separation roller 42 rotates while contacting the sheet SH sent from the supply tray 91 to the upper path PA1, and conveys the sheet SH toward the curved path PC1. The separation piece 43 separates the sheets SH conveyed by the separation roller 42 one by one in cooperation with the separation roller 42.

  The transport unit 4 includes a first transport roller 44, a pinch roller 44P, a second transport roller 45, a pinch roller 45P, a discharge roller 48, and a pinch roller 48P.

  The first conveyance roller 44 and the pinch roller 44P are disposed on the left side of the separation roller 42 and the separation piece 43 in the upper path PA1, that is, on the downstream side in the conveyance direction. The first transport roller 44 is located on the first guide surface 111 side, and the pinch roller 44P is located on the fourth guide surface 134 side. The first conveyance roller 44 and the pinch roller 44P nip the sheet SH separated one by one by the separation roller 42 and the separation piece 43 and convey the sheet SH to the curved path PC1.

  The second conveyance roller 45 and the pinch roller 45P are disposed in the lower part of the curved path PC1. The second transport roller 45 and the pinch roller 45P are located on the left side and the upper side of the reading sensor 3A, that is, on the upstream side in the transport direction. The second transport roller 45 is located on the lower curved surface 126 side, and the pinch roller 45P is located on the fifth guide surface 145A side.

  The second conveying roller 45 and the pinch roller 45P nip the sheet SH conveyed by the first conveying roller 44 and the pinch roller 44P, stop at the fixed reading position, and the reading sensor 3A facing the first inclined portion PB11. The sheet SH is conveyed toward the reading sensor 3B facing the part PB10. At this time, the sheet SH is pressed against the reading surface 83 </ b> A by the pressing member 149. Further, the sheet SH is pressed against the reading surface 82 </ b> A by the pressing member 49.

  The discharge roller 48 and the pinch roller 48P are disposed at a position facing the discharge tray 92 on the right end side of the second inclined portion PB12 of the lower path PB1. The discharge roller 48 is located on the third guide surface 123 side, and the pinch roller 48P is located on the fifth guide surface 145B side. The discharge roller 48 and the pinch roller 48P nip the sheet SH that has passed over the reading surface 82A and discharge it to the discharge tray 92.

<Image reading operation>
In this image reading apparatus 1, when reading an image of a document supported on the document support surface 81A, a scanning mechanism (not shown) operates in the reading unit 3, and the reading sensor 3B is moved from the lower side of the left edge of the document support surface 81A to the right end. Move left and right between the edges. As a result, the reading sensor 3B reads the image of the document supported on the document support surface 81A. Thereafter, the scanning mechanism (not shown) moves the reading sensor 3B that has finished reading from the right end side to the left end side in the reading unit 3 to return to the original position.

  In the image reading apparatus 1, when the images on the first surface SH1 and the second surface SH2 of the sheet SH on the supply tray 91 are read, the opening / closing unit 9 is in the closed position. Then, in the reading unit 3, a scanning mechanism (not shown) operates to stop the reading sensor 3B at a fixed reading position below the reading surface 82A. The reading sensor 3B faces the reference portion PB10 of the lower path PB1 at the fixed reading position.

  When the transport unit 4 sequentially transports the sheet SH on the supply tray 91 along the transport path P1, the sheet SH passes through the upper path PA1 and the curved path PC1 and reaches the lower path PB1. Then, the reading sensor 3A reads an image of the second surface SH2 of the sheet SH that passes through the first inclined portion PB11. Next, the reading sensor 3B stopped at the fixed reading position reads an image of the first surface SH1 of the sheet SH that passes through the reference portion PB10. Then, the sheet SH on which the image has been read passes through the second inclined portion PB12 and is discharged to the discharge tray 92 by the discharge roller 48 and the pinch roller 48P.

<Effect>
In the image reading apparatus 1 according to the embodiment, as illustrated in FIG. 5, the first inclined portion PB11 included in the lower path PB1 is a reading sensor that stops from the curved path PC1 toward the reference portion PB10, that is, at a fixed reading position. It is inclined downward toward the 3B side. The reading sensor 3A has a reading surface 3AA arranged obliquely downward along the first inclined portion PB11. The pressing member 149 and the compression coil spring 149S are provided in the concave portion 170 that is recessed downward from the sixth guide surface 166 that guides the sheet SH in the first inclined portion PB11. As a result, the reading sensor 3A is shifted to the left with respect to the reading sensor 3B stopped at the fixed reading position. Further, the pressing member 149 and the compression coil spring 149S are shifted to the left side of the reading sensor 3A with respect to the reading sensor 3B stopped at the fixed reading position. In other words, in the image reading apparatus 1, the reading sensor 3B, the reading sensor 3A, the pressing member 149, and the compression coil spring 149S stopped at the fixed reading position are in a positional relationship such that they do not overlap when viewed from the vertical direction perpendicular to the document support surface 81A. Yes.

  Therefore, in the image reading apparatus 1 of the embodiment, it is possible to reduce the size in the vertical direction perpendicular to the document support surface 81A.

  Further, in this image reading apparatus 1, as shown in FIGS. 5 and 6, a pressing member is formed on the concave portion 170 of the guide portion 160 that is integrally formed with the frame body 8W of the main body portion 8 and protrudes above the document support surface 81A. Since the 149 and the compression coil spring 149S are provided, the opening / closing part 9 can be easily reduced in weight. Further, in the image reading apparatus 1, as shown in FIG. 7, the first inclined part PB11 and the reference part PB10 of the lower path PB1 are opened by the opening 140H in a state where the opening / closing part 9 is in the open position. It is easy to remove the jammed sheet SH. Further, in the image reading apparatus 1, as shown in FIG. 6, the pressing member 149 is exposed in a state where the opening / closing portion 9 is in the open position, so that it is easy to clean the pressing member 149 and its surroundings.

  Further, as shown in FIGS. 5 and 6, the image reading apparatus 1 includes an inner wall 170 </ b> E that defines the recess 170 and an edge 149 </ b> E that is located on the side closer to the fixed reading position among the edges of the pressing member 149. There is a gap S1 between them. For this reason, in this image reading apparatus 1, dust or the like adhering to the sheet SH passing through the first inclined portion PB11 is likely to fall into the concave portion 170 from the gap S1 between the inner wall surface 170E and the edge 149E of the pressing member 149. For this reason, in this image reading apparatus 1, it is possible to suppress dust and the like from accumulating around the reading sensor 3A and entering the reading sensor 3B side. As a result, in the image reading apparatus 1, it is possible to suppress a decrease in the reading quality of the reading sensors 3A and 3B.

  In the image reading apparatus 1, the sixth guide surface 166 that is also an inclined guide surface is adjacent to the edge 149 </ b> E located on the side closer to the fixed reading position among the end edges of the pressing member 149, and is at the fixed reading position. Inclining down. Such a sixth guide surface 166 can favorably guide the sheet SH from the pressing member 149 side to the reading sensor 3B side stopped at the fixed reading position.

  Further, in the image reading apparatus 1, the sixth guide surface 166 is formed by upper end edges 169 </ b> D of the plurality of ribs 169. For this reason, in this image reading apparatus 1, since the contact area between the sixth guide surface 166 and the sheet SH is reduced, the conveyance resistance of the sheet SH can be reduced.

  Further, in this image reading apparatus 1, even if dust or the like that has entered the gap S <b> 1 is likely to pass between the ribs 169, the image reading apparatus 1 extends along the front-rear direction while intersecting the ribs 169, and protrudes upward. The wall 161 is dammed up. For this reason, in the image reading apparatus 1, it is possible to suppress the dust and the like from entering the fixed reading position and adhering to the periphery of the reading surface 82 </ b> A of the second platen glass 82.

  Furthermore, in this image reading apparatus 1, as shown in FIGS. 6 and 8, dust or the like dammed up by the first wall portion 161 flows out from the both ends in the front-rear direction of the first wall portion 161 to the outside of the recess 170. Even so, each of the second walls 162 and 162 can be enclosed. For this reason, in the image reading apparatus 1, the dust or the like hardly flows out from the concave portion 170, so that the dust or the like enters the fixed reading position side and adheres to the periphery of the reading surface 82 </ b> A of the second platen glass 82. Can be reliably suppressed.

  Further, in this image reading apparatus 1, since the pair of front and rear holding parts 180 and 180 hold the pressing member 149 so as to be detachable, the pressing member 149 can be easily replaced. Further, in the image reading apparatus 1, as shown in FIG. 8, the periphery of the concave portion 170 can be easily cleaned by removing the pressing member 149 while the opening / closing portion 9 is in the open position.

  While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments and can be appropriately modified and applied without departing from the spirit thereof.

  In the embodiment, the main body portion 8 includes the guide portion 160, but is not limited to this configuration. The opening / closing part may have a guide part similar to the guide part 160 of the embodiment.

  In the embodiment, the “sixth guide surface 166”, which is an example of the “guide surface” of the present invention, is also the “inclined guide surface” of the present invention, but is not limited to this configuration. For example, the inclined guide surface may be a part of the guide surface, and the other part of the guide surface may be formed on the upstream side in the transport direction from the pressing member.

  Further, in the embodiment, the inner wall surface 170E extends in the front-rear direction while being discontinuous between the ribs 169, but is not limited to this shape, and is continuous with the left end portions of the ribs 169 connected to each other. It may be formed as a surface. Furthermore, the position of the 1st wall part 161 is not limited to the position of an Example, You may shift | deviate to the left-right direction, and multiple numbers may be formed. The position and number of the first wall portions 161 can be set according to the length of the guide surface 166.

  The present invention can be used for an image reading apparatus, a multifunction machine, and the like.

DESCRIPTION OF SYMBOLS 1 ... Image reading apparatus, 81A ... Document support surface, 8 ... Main body part, 9 ... Opening / closing part, 4 ... Conveyance part P1 ... Conveyance path, PA1 ... Upper path, PB1 ... Lower path, PC1 ... Curve path SH ... Sheet, SH1... First surface of sheet, SH2... Second surface of sheet 3B... First reading unit (reading sensor), 3A.
PB11: inclined portion (first inclined portion), 160: guide portion 166 ... guide surface (sixth guide surface, inclined guide surface)
3AA: Reading surface of the second reading unit, 170: Concave portion 149: Pressing member, 149S: Biasing member (compression coil spring)
170E ... Inner wall surface defining the recess 149E ... End edge of the pressing member (the end edge of the pressing member located on the side closer to the fixed reading position)
S1: Gap between the inner wall surface defining the recess and the edge of the pressing member 169 ... Rib, 169D ... Upper edge of the rib 161 ... First wall portion, 162 ... Second wall portion, 180 ... Holding portion

Claims (10)

A main body provided with a document support surface on the upper surface for supporting a document to be read;
An opening / closing part supported by the main body part so as to be displaceable between a closed position covering the original document supporting surface and an open position exposing the original document supporting surface;
Conveyance for conveying sheets including an upper path, a lower path positioned below the upper path, and a curved path connecting the upper path and the lower path, provided in the opening / closing section. A conveying unit configured to convey a sheet from the upper path to the lower path via the curved path;
An image of a document housed in the main body and supported on the document support surface is read while moving, and the sheet conveyed in the lower path is moved from the lower side when the opening / closing unit is in the closed position. A first reading unit configured to stop at an opposing fixed reading position and read an image of a first surface facing the lower side of the sheet;
An image reading apparatus comprising: a second reading unit configured to read an image on a second surface of the sheet that is accommodated in the opening / closing unit and that is conveyed on the conveyance path and facing the first surface. There,
The lower path has an inclined part that inclines downward from the curved path toward the first reading unit that stops at the fixed reading position,
The main body part or the opening / closing part extends so as to be able to come into contact with the first surface of the sheet passing through the inclined part from below when the opening / closing part is in the closed position. Having a guide portion forming a guide surface for guiding
The second reading unit is disposed at a position facing the guide surface from above in a state where the opening / closing unit is in the closed position, and the reading surface is disposed obliquely downward along the inclined unit,
The guide portion is formed with a recess that is recessed downward from the guide surface.
The concave portion is provided with a pressing member that is held so as to be able to contact the first surface of the sheet that passes through the inclined portion, and a biasing member that biases the pressing member toward the second reading portion. An image reading apparatus.   The image reading apparatus according to claim 1, wherein the guide portion is provided in the main body portion and is formed to protrude upward from the document support surface of the main body portion.   The image reading apparatus according to claim 1, wherein a gap is provided between an inner wall surface defining the recess and an edge of the pressing member.   4. The guide surface includes an inclined guide surface that is adjacent to an edge located on a side closer to the fixed reading position among the edges of the pressing member and is inclined downward toward the fixed reading position. The image reading apparatus described.   5. The image reading apparatus according to claim 4, wherein the inclined guide surface is formed by upper end edges of a plurality of ribs arranged at intervals along the longitudinal direction of the first reading unit and protruding upward.   The image reading apparatus according to claim 5, wherein the guide portion includes a first wall portion that extends along the longitudinal direction while intersecting with the ribs and protrudes upward.   The image reading apparatus according to claim 6, wherein the guide portion includes a second wall portion extending from both end portions of the first wall portion in the longitudinal direction toward the pressing member.   The image reading apparatus according to claim 1, wherein the concave portion is provided with a holding portion that detachably holds the pressing member. An upper path, a lower path positioned below the upper path, and a curved path that connects the upper path and the lower path to define a conveyance path for conveying a sheet, A conveying section configured to convey a sheet from the path to the lower path via the curved path;
A first reading unit configured to read an image of a first surface facing a sheet conveyed in the lower path from below and facing the lower side of the sheet;
An image reading apparatus comprising: a second reading unit configured to read an image on a second surface facing a side opposite to the first surface of the sheet conveyed in the conveyance path;
The lower path includes an inclined portion that is inclined downward from the curved path toward the first reading unit side,
A guide portion that extends from the lower side so as to contact the first surface of the sheet passing through the inclined portion, and that forms a guide surface that guides the sheet in the inclined portion;
The second reading unit is disposed at a position facing the guide surface from above, and the reading surface is disposed obliquely downward along the inclined portion.
The guide portion is formed with a recess that is recessed downward from the guide surface.
The concave portion is provided with a pressing member that is held so as to be able to contact the first surface of the sheet that passes through the inclined portion, and a biasing member that biases the pressing member toward the second reading portion. And
An image reading apparatus comprising a gap between an inner wall surface defining the recess and an edge of the pressing member. The guide surface includes an inclined guide surface that is adjacent to an edge located on the first reading unit side among the edges of the pressing member and is inclined downward toward the first reading unit side,
The inclined guide surface is formed by upper end edges of a plurality of ribs arranged at intervals along the longitudinal direction of the first reading unit and projecting upward.
The guide portion extends along the longitudinal direction while intersecting the ribs, and protrudes upward, and both ends of the longitudinal direction of the first wall portion toward the pressing member. The image reading apparatus according to claim 9, further comprising a second wall portion extending.

Images