Image reading device

Abstract

To provide an image reading device capable of preventing a holder for holding a document pressing member from being bent even when a document cover is left open, and further capable of preventing a document passing through a reading surface from being jammed.SOLUTION: In an image reading device 1, a holder 70 holds both ends 50A and 50B of a document pressing member 50 in a width direction, and moves the document pressing member 50 away from a second reading part 3B by swinging. The holder 70 includes a pedestal 76 that receives a biasing member 60, a first upstream contact part 75 that is located upstream of the pedestal 76 in a transport direction DT1 and can come into contact with the document pressing member 50 from above, and a first downstream contact part 72 that is located downstream of the document pressing member 50 and the pedestal 76 in the transport direction DT1 and can come into contact with a frame 39 from above. The pedestal 76, the first upstream abutting part 75, and the first downstream abutting part 72 are located at positions overlapping a center 50C in a width direction of the document pressing member 50 in the width direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an image reading device. [Background technology]

[0002] Patent Document 1 discloses an example of a conventional image reading device. In this image reading device, a slit glass and a scoop guide that scoops up documents passing over the surface of the slit glass are provided on the top surface of the image reading unit. An automatic document feeder is connected to the image reading unit, covers the top surface of the image reading unit, and is movable to expose the top surface of the image reading unit.

[0003] The transport unit provided in the automatic document feeder transports the document in the transport direction so that it passes over the slit glass surface and the scooping guide. An image of the downward-facing side of the document passing over the slit glass surface can be read by a light source, multiple mirror members, multiple carriages, an imaging lens, and an imaging unit provided in the image reading unit. An image of the upward-facing side of the document scooped up by the scooping guide can be read by a second image reading unit provided downstream of the scooping guide in the automatic document feeder in the transport direction.

[0004] The automatic document feeder has an opening unit, a second reading guide, and a coil spring (not shown). The opening unit holds the second reading guide. The coil spring (not shown) is provided between the second reading guide and the opening unit. The second reading guide is located downstream of the scooping guide in the conveying direction and below the second image reading unit, perpendicular to the conveying direction, and extends in the width direction parallel to the surface of the slit glass. The second reading guide presses the document scooped up by the scooping guide toward the second image reading unit. The coil spring (not shown) biases the second reading guide toward the second image reading unit.

[0005] The opening unit is swingable about a swing axis extending in the width direction downstream of the second reading guide in the transport direction. With this image reading device, when the automatic document feeder opens the top surface of the image reading unit, the opening unit is swung to move the second reading guide away from the second image reading unit, thereby cleaning the dirty second image reading unit. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-171130 Summary of the Invention [Problem to be solved by the invention]

[0007] In the conventional image reading device, there are cases where the automatic document feeder is left in a position that opens the top surface of the image reading unit. In this case, the reaction force of the coil spring (not shown) that biases the second reading guide causes the opening unit to bend away from the second image reading unit and the second reading guide, and the opening unit may become sagged if left unused for a long period of time.

[0008] Furthermore, if the conveying section conveys the document while the opening unit has a tendency to bend, a reverse step is likely to occur due to a misalignment in the relative positional relationship between the scoop guide and the opening unit, which can lead to the problem of the document passing through the surface of the slit glass becoming jammed.

[0009] The automatic document feeder can be compared to the document cover of the present invention, the second reading guide can be compared to the document holder of the present invention, the opening unit can be compared to the holder of the present invention, and the slit glass surface can be compared to the reading surface of the present invention.

[0010] The present invention has been made in consideration of the above-mentioned conventional situation, and aims to provide an image reading device that can prevent the holder that holds the document press from becoming bent even when the document cover is left open, and ultimately can prevent documents that have passed over the reading surface from clogging. [Means for solving the problem]

[0011] The image reading device of the present invention includes a main body having a reading surface on an upper surface thereof through which a document passes and a scoop guide for scooping up the document passing through the reading surface; a document cover connected to the main body, covering the top surface, and movable to open the top surface; an automatic transport mechanism provided in the document cover and configured to transport the document in a transport direction so that the document passes through the reading surface and the scoop guide; a first reading unit provided in the main body and capable of reading an image on a downward-facing surface of a document passing through the reading surface; a second reading unit that is provided downstream of the scooping guide in the document cover in the transport direction and that is capable of reading an image on an upward facing surface of the document scooped up by the scooping guide; An image reading device comprising: the document cover includes a frame that supports the automatic transport mechanism and the second reading unit; a document presser that is located downstream of the scooping guide in the transport direction and below the second reading unit, extends perpendicular to the transport direction and in a width direction parallel to the reading surface, and presses the document scooped up by the scooping guide toward the second reading unit; and a holder that holds both ends of the document presser in the width direction, and is pivotally supported by the frame so as to be swingable about a swing axis extending in the width direction downstream of the document presser in the transport direction, the holder swinging to separate the document presser from the second reading unit; a biasing member provided between the document holder and the holder, and biasing the document holder toward the second reading unit; the holder has a base positioned below the document presser and receiving the biasing member; a first upstream contact portion located upstream of the base in the conveying direction and capable of contacting the document presser from above; a first downstream contact portion located downstream of the document holder and the base in the transport direction and capable of contacting the frame from above, The base, the first upstream contact portion, and the first downstream contact portion are located at positions that overlap with the center of the document holder in the width direction.

[0012] In the image reading device of the present invention, with the document cover opening the top surface of the main body, the document holder is swung to separate the document presser from the second reading unit, thereby making it possible to clean the soiled second reading unit.

[0013] This image reading device may be left with the document cover moved to open the top surface of the main body.If no measures are taken in this case, the reaction force of the biasing member biasing the document presser may cause the holder to bend away from the second reading unit and the document presser, and the holder may become flexed if left unused for a long period of time.

[0014] In this regard, in the image reading device of the present invention, when the reaction force of the urging member urging the document holder acts on the base, the first upstream abutment portion and the first downstream abutment portion configured as described above reliably transmit the reaction force to the document holder and the frame at a position in the width direction that is approximately the same as the center of the document holder and the base, and at a position that sandwiches the base in the conveying direction.

[0015] Therefore, in this image reading device, even if the document cover is moved to open the top surface of the main body and left, the holder can be prevented from bending so as to move away from the second reading unit and the document presser, so the holder is less likely to develop a bending habit even when left unused for a long period of time.As a result, this image reading device can prevent deviation in the relative positional relationship between the scoop guide and the holder, so that reverse steps are less likely to occur between the scoop guide and the holder and the document presser.

[0016] Therefore, the image reading device of the present invention can prevent the holder that holds the document press from becoming bent even if the document cover is left open, and ultimately can prevent documents that pass over the reading surface from jamming. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of an image reading apparatus according to an embodiment of the present invention. [Figure 2] FIG. 2 is a schematic partial cross-sectional view of the image reading device according to the embodiment. [Figure 3] FIG. 3 is a partial perspective view showing a state in which the document cover opens the top surface of the main body. [Figure 4] FIG. 4 is a schematic partial cross-sectional view showing an enlarged essential part of FIG. [Figure 5] FIG. 5 is a schematic partial cross-sectional view similar to FIG. 4, showing a state in which the holder has swung and the document presser is separated from the reading glass and the second reading sensor. [Figure 6] FIG. 6 is a partial perspective view similar to FIG. 3, showing a state in which the holder has swung and the document presser is separated from the reading glass and the second reading sensor. [Figure 7] FIG. 7 is a partial perspective view showing the base frame of the document cover and the holder housed in the housing portion of the base frame. [Figure 8] FIG. 8 is a schematic partial bottom view showing the base frame of the document cover and the holder housed in the housing portion of the base frame. [Figure 9] FIG. 9 is a perspective view showing the holder, the document holder, the guide film, the white reference film, and the torsion coil spring. [Figure 10] FIG. 10 is a perspective view showing the holder, the document holder, and the compression coil spring. [Figure 11] FIG. 11 is a top view showing the holder and the document holder separated from each other. [Figure 12]FIG. 12 is a schematic partial cross-sectional view similar to FIG. 5, illustrating the action of the first upstream contact portion and the first downstream contact portion when the document cover opens the top surface of the main body. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0019] (Example) As shown in Fig. 1, an image reading device 1 of the embodiment is one example of a specific aspect of the image reading device of the present invention. In Fig. 1, the operation panel 8P side of the image reading device 1 is the front. The side that is to the left when facing the operation panel 8P is the left side. The front-rear direction, left-right direction, and up-down direction shown in Fig. 2 and subsequent figures are all displayed in accordance with the directions shown in Fig. 1.

[0020] <Overall structure> As shown in FIG. 1, the image reading device 1 includes a main body 8 and a document cover 9. The main body 8 is a flat, roughly box-shaped body. An operation panel 8P, such as a touch panel, is located on the front of the main body 8. The main body 8 houses an image forming unit 5 in its lower portion. The image forming unit 5 forms an image on a sheet using an inkjet system, a laser system, or the like.

[0021] As shown in FIGS. 2 and 3, the main body 8 has an upper surface provided with a document support surface 8A, a reading surface 8B, and a scoop guide 7.

[0022] The document support surface 8A is the upper surface of a large-area platen glass located on the top surface of the main body 8. The reading surface 8B is the upper surface of a platen glass that is located to the left of the document support surface 8A on the top surface of the main body 8 and extends in an elongated shape in the front-to-rear direction.

[0023] The scoop guide 7 is located between the document support surface 8A and the reading surface 8B, protrudes upward, and extends in an elongated shape in the front-rear direction.

[0024] The document support surface 8A supports a document to be scanned. The document to be scanned may be paper, a sheet such as an OHP sheet, a book, etc. The scanning surface 8B and the scoop guide 7 are used when the automatic transport mechanism 4, which will be described later, is in operation.

[0025] The main body 8 houses the image reading unit 3 in its upper portion. The image reading unit 3 has a first reading sensor 3A and a scanning mechanism (not shown). The first reading sensor 3A is an example of the "first reading unit" of the present invention.

[0026] The first reading sensor 3A is a well-known image reading sensor that uses a CIS (Contact Image Sensor) or a CCD (Charge Coupled Device), and is elongated in the front-to-rear direction. The first reading sensor 3A is located below the document support surface 8A and the reading surface 8B.

[0027] When the image reading unit 3 reads an image of a document supported on the document support surface 8A, the first reading sensor 3A moves from below the left edge of the document support surface 8A to the right, i.e., in the sub-scanning direction, by operation of a scanning mechanism (not shown), and reads the image of the document in a line in the front-to-back direction, i.e., in the main scanning direction. When the first reading sensor 3A moves to below the right edge of the document support surface 8A, it finishes reading the image and returns to its standby position by operation of a scanning mechanism (not shown).

[0028] When the automatic transport mechanism 4, which will be described later, is activated, the first reading sensor 3A moves to a stationary reading position below the reading surface 8B and remains stationary there, due to the operation of a scanning mechanism (not shown).

[0029] 1, the document cover 9 is located above the main body 8. The rear end of the document cover 9 is connected to the rear end of the main body 8 via a hinge (not shown). The document cover 9 is swingable around a swing axis X9 extending in the left-right direction.

[0030] When closed, the document cover 9 covers the top surface of the main body 8. As shown in Fig. 3, when the user swings the document cover 9 upward and backward around the swing axis X9, the document cover 9 opens the top surface of the main body 8. In this state, the user can place a document on the document support surface 8A and remove the document.

[0031] 2, the document cover 9 has a base frame 39, a lower chute 37, and an upper chute 34. The base frame 39, the lower chute 37, and the upper chute 34 are an example of the "frame" in the present invention.

[0032] The lower surface of the base frame 39 forms the bottom surface of the document cover 9, and is large enough to cover the document support surface 8A and the reading surface 8B. The lower chute 37 is located above the left portion of the base frame 39. The upper chute 34 is located above the lower chute 37.

[0033] Although not shown, the front and rear ends of the lower chute 37 are attached to the front and rear ends of the left portion of the base frame 39. The front and rear ends of the upper chute 34 are also attached to the front and rear ends of the left portion of the base frame 39.

[0034] The base frame 39, the lower chute 37, and the upper chute 34 are each an integrally molded product made of a resin material. In this embodiment, the base frame 39, the lower chute 37, and the upper chute 34 are each manufactured by injection molding of a thermoplastic resin.

[0035] <Supply tray and discharge tray> 1 and 2, the document cover 9 has a supply tray 90 and a discharge tray 96. The supply tray 90 and the discharge tray 96 are located on the right side of the document cover 9.

[0036] 2, the upper surface of the right portion of the base frame 39 forms a discharge tray 96. The discharge tray 96 supports documents SH that are transported and discharged by the automatic transport mechanism 4, which will be described later.

[0037] The supply tray 90 is located above the discharge tray 96. The supply tray 90 has an original support surface 94. The original support surface 94 supports sheet-like originals SH, which are to be scanned, in a stacked state.

[0038] In this embodiment, the document whose image is read using the document support surface 8A and the document SH whose image is read while being transported by the automatic transport mechanism 4 may be substantially the same.

[0039] The document support surface 94 extends with a gentle downward slope to the left and also extends in the front-to-rear direction. The width direction of the document support surface 94 is the front-to-rear direction and is parallel to the reading surface 8B. In this embodiment, one side of the width direction is the front, and the other side of the width direction is the rear.

[0040] The transport direction DT1 in which the document SH supported on the document support surface 94 is transported to the discharge tray 96 is leftward from the document support surface 94 to the left side of the document cover 9, makes a downward U-turn at the left side of the document cover 9, and then turns rightward as it passes through the reading surface 8B and the scooping guide 7 and reaches the discharge tray 96. The transport direction DT1 is perpendicular to the width direction.

[0041] A downstream end 94D of the document support surface 94 in the transport direction DT1 is located between the left side surface of the document cover 9 and the center in the left-right direction.

[0042] The upper chute 34 integrally includes a first tray 91, which is the right portion of the upper chute 34, and a guide portion 34A, which is the left portion of the upper chute 34.

[0043] The first tray 91 extends to the left, sloping gently downward. The upper surface of the first tray 91 forms a first support surface 91A. The first tray 91 forms part of the supply tray 90. The first support surface 91A is part of the document support surface 94, and includes a downstream end 94D of the document support surface 94.

[0044] The guide portion 34A extends gently upward to the left, and then curves downward. The upper surface of the guide portion 34A forms a conveyance guide surface 34G.

[0045] 1 and 2, the document cover 9 has a second tray 92 and a sub-tray 93 which, together with a first tray 91, constitute a supply tray 90. The top surfaces of the second tray 92 and the sub-tray 93 are the remainder of a document support surface 94.

[0046] <Second reading sensor> 4, the upstream end 7U of the scoop guide 7 in the conveying direction DT1 is located below the reading surface 8B. The scoop guide 7 has an inclined surface 7S that faces upward and extends in an upward inclined manner from the upstream end 7U to the downstream end 7D in the conveying direction DT1.

[0047] 2, the lower chute 37 has a lower guide portion 37G and a recessed portion 37H. The upstream end of the lower guide portion 37G in the conveying direction DT1 faces the inclined surface 7S of the scoop guide 7 from above. The lower guide portion 37G extends so as to slope upward along the conveying direction DT1. The recessed portion 37H is recessed upward from a middle portion of the lower guide portion 37G in the conveying direction DT1 and extends in the width direction.

[0048] The document cover 9 has a second reading sensor 3B. The second reading sensor 3B is an example of the "second reading unit" of the present invention. The lower chute 37 supports the second reading sensor 3B while it is housed in a recess 37H. The downward opening of the recess 37H is closed by a reading glass 37R. The reading glass 37R covers the second reading sensor 3B to prevent it from being soiled by paper dust and the like.

[0049] The second reading sensor 3B is located downstream of the scoop guide 7 in the conveying direction DT1 within the document cover 9. Like the first reading sensor 3A, the second reading sensor 3B is a well-known image reading sensor that uses a CIS, a CCD, or the like.

[0050] <Automatic transport mechanism and first to third transport guides> The document cover 9 has an automatic transport mechanism 4, a first transport guide 31, a second transport guide 32, and a third transport guide 33. The automatic transport mechanism 4 and the first to third transport guides 31 to 33 are located inside the left portion of the document cover 9. The base frame 39, the lower chute 37, and the upper chute 34, together with a sheet metal frame (not shown), support the automatic transport mechanism 4.

[0051] The automatic transport mechanism 4 includes a feed roller 41, a separation roller 42, a separation pad 42A, a first transport roller pair 43, a first document holder 44, a second document holder 50, a second transport roller pair 45, a discharge roller 47, and an elastic piece 48.

[0052] As will be described in detail later, the second document holder 50 is held by a holder 70 housed in the housing section 20 of the base frame 39. The second document holder 50 extends in the width direction at a position downstream of the scoop guide 7 in the conveying direction DT1 and below the second reading sensor 3B. A compression coil spring 60 provided between the second document holder 50 and the holder 70 biases the second document holder 50 toward the reading glass 37R and the second reading sensor 3B.

[0053] 4, a guide film 61 is attached to the second document holder 50. A downstream end 61D of the guide film 61 in the conveying direction DT1 is located upstream of the second reading sensor 3B in the conveying direction DT1. An upstream end 61U of the guide film 61 in the conveying direction DT1 is located upstream of an upstream end 70U of the holder 70 in the conveying direction DT1, and is located below a downstream end 7D of the scoop guide 7 in the conveying direction DT1.

[0054] The second document holder 50 is an example of the "document holder" of the present invention. The compression coil spring 60 is an example of the "biasing member" of the present invention.

[0055] As shown in FIG. 2, the feed roller 41 is located upstream of the downstream end 94D of the document support surface 94 in the transport direction DT1, and faces the first support surface 91A from above.

[0056] The separation roller 42 is located downstream of the downstream end 94D of the document support surface 94 in the transport direction DT1, and faces the transport guide surface 34G from above.

[0057] The separation pad 42A is exposed on the conveying guide surface 34G and is supported by the guide portion 34A so as to be able to swing, facing the separation roller 42 from below. The separation pad 42A is pressed toward the separation roller 42 by a biasing spring.

[0058] The first conveying roller pair 43 is located on the left side of the document cover 9, close to the top surface of the main body 8. The first document holder 44 extends in the width direction at a position directly above the reading surface 8B and to the left of the lower guide portion 37G.

[0059] The first transport guide 31 is made up of a transport guide surface 34G and a rib protruding downward from the rear surface of the left-end upper cover 98. The first transport guide 31 guides the document SH supported on the document support surface 94 to the first transport roller pair 43.

[0060] The second conveying guide 32 is made up of a portion of the lower chute 37 located to the left of the first document holder 44, a guide surface formed inside the left side surface of the document cover 9, and the like.

[0061] The second conveying guide 32 guides the original SH from the first conveying roller pair 43 to the reading surface 8B at an incline downward, and then guides the original SH to pass between the first original holder 44 and the reading surface 8B, i.e., above the first reading sensor 3A at the stationary reading position. The first original holder 44 presses the original SH passing over the reading surface 8B toward the reading surface 8B.

[0062] The second conveying roller pair 45 is located above and to the left of the left end of the discharge tray 96. The upper drive roller 45A of the second conveying roller pair 45 is rotatably supported by a portion of the lower guide portion 37G located on the downstream end side in the conveying direction DT1.

[0063] The discharge roller 47 is located above the left edge of the discharge tray 96 and slightly shifted to the left from the left edge of the discharge tray 96. The upper end of the discharge roller 47 is located above the nip position of the second conveying roller pair 45.

[0064] The elastic piece 48 is made of a highly rigid film. The elastic piece 48 is cantilevered at the downstream end of the lower guide portion 37G in the conveying direction DT1. The elastic piece 48 protrudes to the right so as to overlap with the upper portion of the discharge roller 47 when viewed along the width direction. The elastic piece 48 is bent at a position to the right of the discharge roller 47 and inclined downward to the right.

[0065] Although not shown, the automatic transport mechanism 4 has a plurality of discharge rollers 47 and a plurality of elastic pieces 48, and the discharge rollers 47 and the elastic pieces 48 are arranged alternately in the width direction.

[0066] The third conveying guide 33 consists of the lower surface of the lower guide portion 37G, the lower surface of the reading glass 37R, the inclined surface 7S of the scoop guide 7, the guide film 61, the second document holder 50, and a portion located between the second document holder 50 and the discharge tray 96 on the base frame 39 and facing the lower guide portion 37G from below.

[0067] The third conveyance guide 33 uses the scoop guide 7 to scoop up the original SH passing over the reading surface 8B, and then uses the guide film 61 to guide the original SH so that it passes between the second original holder 50 and the reading glass 37R, i.e., below the second reading sensor 3B. The second original holder 50 presses the original SH scooped up by the scoop guide 7 toward the reading glass 37R and the second reading sensor 3B. The third conveyance guide 33 then guides the original SH to pass through the second conveyance roller pair 45, and further to the discharge roller 47 and the elastic piece 48.

[0068] <Image reading operation of documents supported on the supply tray> In the image reading device 1, when the image reading unit 3 reads an image of a document SH supported on the document support surface 94 of the supply tray 90, the automatic transport mechanism 4 operates and the feed roller 41 feeds the document SH supported on the document support surface 94. If there are multiple documents SH fed by the feed roller 41, the separation roller 42 and the separation pad 42A separate the documents SH one by one and transport the documents SH toward the first transport roller pair 43.

[0069] Next, the first conveying roller pair 43 conveys the document SH guided by the first conveying guide 31 and the second conveying guide 32, and passes it over the first reading sensor 3A which is at the stationary reading position.

[0070] In other words, the automatic transport mechanism 4 transports the document SH by the first transport roller pair 43 in the transport direction DT1 so that the document SH passes over the reading surface 8B and the scoop guide 7.

[0071] As a result, the first reading sensor 3A reads an image of the downward-facing side of the original SH passing over the reading surface 8B. The downward-facing side of the original SH passing over the reading surface 8B is the side that faced upward when the original SH was supported on the original support surface 94.

[0072] Furthermore, the first conveying roller pair 43 conveys the original SH toward the second reading sensor 3B. When the image reading unit 3 reads images on both sides of the original SH, the second reading sensor 3B reads the image of the upward-facing side of the original SH scooped up by the scooping guide 7. The upward-facing side of the original SH scooped up by the scooping guide 7 is the side that faced downward when the original SH was supported on the original support surface 94.

[0073] Thereafter, the second conveying roller pair 45 conveys the document SH guided by the third conveying guide 33 toward the discharge roller 47 and the elastic piece 48. The discharge roller 47 and the elastic piece 48 discharge the document SH onto the discharge tray 96 while deforming it into a wave-like shape.

[0074] At this time, the discharge roller 47 and the elastic piece 48 discharge the document SH onto the discharge tray 96 from a position higher than the nip position of the second conveying roller pair 45.

[0075] The image reading device 1 has the following configuration to enable cleaning of the reading glass 37R that covers the second reading sensor 3B when the reading glass 37R is soiled with paper dust or the like.

[0076] <Accommodation section, pivot support section, and second downstream contact section> As shown in Figures 5 to 8, the base frame 39 has a storage section 20. Figure 5 corresponds to the state in which the document cover 9 opens the top surface of the main body 8, as shown in Figure 6. For this reason, the up-down direction on the paper surface of Figure 5 is different from the up-down direction shown in Figure 4. The same is true for Figure 12 shown later.

[0077] As shown in FIG. 7, the accommodation portion 20 is a portion located on the right side of a substantially rectangular opening 39H formed in the left portion of the base frame 39, and is capable of accommodating a holder .

[0078] The left portion of the opening 39H is cut out so that the first document holder 44 faces the reading surface 8B and the upstream end of the lower guide portion 37G in the conveying direction DT1 faces the inclined surface 7S of the scoop guide 7.

[0079] 8, the base frame 39 has pivotal support portions 28A and 28B. The pivotal support portions 28A and 28B are provided on both ends 20A and 20B of the accommodation portion 20 in the width direction.

[0080] More specifically, the pivotal support portion 28A located on one side in the width direction is a pivotal hole formed in one end 20A of the storage portion 20 in the width direction. The pivotal support portion 28B located on the other side in the width direction is a pivotal hole formed in the other end 20B of the storage portion 20 in the width direction.

[0081] The pivotal support portions 28A, 28B are centered on a swing axis X70. The swing axis X70 is located on the downstream end 20D side of the storage unit 20 in the conveying direction DT1 and extends in the width direction. The downstream end 20D of the storage unit 20 is the right end of the storage unit 20, and extends in the width direction while bending.

[0082] 4, 7, and 8, the base frame 39 has a second downstream contact portion 27. The second downstream contact portion 27 is provided on the downstream end 20D side of the storage section 20 in the conveying direction DT1. The second downstream contact portion 27 is a plate-like piece that is located on the lower surface side of the base frame 39, at the center of the storage section 20 in the width direction, protrudes leftward, and extends in the width direction.

[0083] <Holder, supported portion, support portion, base, first upstream contact portion, and first downstream contact portion> As shown in Figures 8 to 11, the holder 70 is a generally plate-shaped member that extends slightly longer in the width direction than the second document holder 50 and has a small thickness in the up-down direction. The length of the holder 70 in the left-right direction is significantly smaller than the length of the holder 70 in the width direction. The holder 70 is a one-piece molded product made of a resin material. In this embodiment, the holder 70 is manufactured by injection molding of a thermoplastic resin or the like.

[0084] 10, the holder 70 has axially supported portions 78A and 78B. The axially supported portions 78A and 78B are provided on the downstream end 70D side of the holder 70 in the conveying direction DT1 and on both ends 70A and 70B in the width direction.

[0085] More specifically, the supported portion 78A located on one side in the width direction is a cylinder that protrudes in one direction in the width direction from a portion that protrudes to the right at one end 70A of the holder 70 in the width direction. The supported portion 78B located on the other side in the width direction is a cylinder that protrudes in the other direction in the width direction from a portion that protrudes to the right at the other end 70B of the holder 70 in the width direction.

[0086] The pivotally supported portions 78A, 78B are centered about the pivot axis X70. As shown in Fig. 8, the pivotally supported portions 28A, 28B of the base frame 39 pivotally support the pivotally supported portions 78A, 78B, thereby allowing the holder 70 to pivot about the pivot axis X70. In this way, as shown in Figs. 5 and 6, the holder 70 is pivotally supported by the base frame 39 so as to be pivotable about the pivot axis X70 downstream of the second document holder 50 in the conveying direction DT1.

[0087] 8 and 9, the holder 70 holds the torsion coil spring 69 at a position slightly spaced apart in the other width direction from the supported portion 78A. The coil portion of the torsion coil spring 69 is centered on the oscillation axis X70. One end 69A of the torsion coil spring 69 is engaged with the holder 70. The other end 69B of the torsion coil spring 69 is engaged with the base frame 39, as shown in FIG.

[0088] The torsion coil spring 69 biases the holder 70 so as to hold the holder 70 in a state where it is housed in the housing portion 20 .

[0089] As shown in FIG. 4, the cross-sectional shape of the upstream end 70U of the holder 70 in the conveying direction DT1 tapers toward the upstream side in the conveying direction DT1.

[0090] 10, the holder 70 has positioning protrusions 77A and 77B. The positioning protrusion 77A, which is located on one side in the width direction, protrudes slightly upward from a corner located on the upstream end 70U side of the holder 70 in the conveying direction DT1 and on the one end 70A side in the width direction. The positioning protrusion 77B, which is located on the other side in the width direction, protrudes slightly upward from a corner located on the upstream end 70U side of the holder 70 in the conveying direction DT1 and on the other end 70B side in the width direction.

[0091] When holder 70, biased by torsion coil spring 69, is housed in housing portion 20, positioning protrusions 77A and 77B come into contact from below with a stopper portion (not shown) of lower chute 37. As a result, upstream end 70U of holder 70 in conveying direction DT1 is positioned relative to lower guide portion 37G in the up-down direction.

[0092] The holder 70 has a knob 70N. The knob 70N protrudes in one direction in the width direction from one end 70A in the width direction of the holder 70. The knob 70N is located slightly to the left of the supported portion 78A.

[0093] 5 and 6, the user can pivot the holder 70 around the pivot axis X70 by gripping the knob 70N and moving the knob 70N against the biasing force of the torsion coil spring 69. By pivoting, the holder 70 moves the second document holder 50 away from the reading glass 37 and the second reading sensor 3B.

[0094] 10 and 11, the holder 70 has support portions 79A and 79B. The support portions 79A and 79B are provided on both ends 70A and 70B of the holder 70 in the width direction.

[0095] More specifically, the support portion 79A located on one side in the width direction is located at one end 70A of the holder 70 in the width direction and is a small cylinder that protrudes toward the other side in the width direction. The support portion 79A is located at a position spaced to the left of the supported portion 78A and spaced to the right of the positioning protrusion 77A. The support portion 79B located on the other side in the width direction is located at the other end 70B of the holder 70 in the width direction and is a small cylinder that protrudes toward one side in the width direction. The support portion 79B is located at a position spaced to the left of the supported portion 78B and spaced to the right of the positioning protrusion 77B.

[0096] The holder 70 has a base 76 , a first upstream contact portion 75 and a first downstream contact portion 72 .

[0097] The base 76 is formed in a portion located in the widthwise center of the holder 70. The base 76 is composed of a rib with a generally "+" shaped cross section that protrudes upward from the middle portion in the left-right direction on the top surface of the holder 70, and the peripheral edge of the rib.

[0098] As shown in FIG. 4, the base 76 is positioned below the second document holder 50 and receives the lower end of the compression coil spring 60 .

[0099] As shown in Figures 10 and 11, the first upstream abutment portion 75 is located in the center of the holder 70 in the width direction, and is formed in a portion located upstream of the base 76 in the conveying direction DT1, i.e., to the left.

[0100] The first upstream contact portion 75 has a short beam shape extending in the width direction. Both ends of the first upstream contact portion 75 are connected to the upper edges of a pair of ribs that sandwich, in the width direction, a rectangular hole that penetrates the holder 70. As shown in Fig. 4, the first upstream contact portion 75 has a generally trapezoidal cross section.

[0101] 10 and 11, the first downstream contact portion 72 is located in the center of the holder 70 in the width direction and protrudes rightward from the downstream end 70D of the holder 70 in the conveying direction DT1. The first downstream contact portion 72 is located in a position overlapping with the oscillation axis X70.

[0102] In this embodiment, a groove that bifurcates the right end side of the first downstream abutment portion 72 is formed in the first downstream abutment portion 72, but this groove is for forming a guide rib that forms part of the third conveying guide 33 on the base frame 39 and is not essential.

[0103] 4, the lower surface of the portion of the first downstream abutment portion 72 located to the right of the oscillation axis X70 is flat, and faces the second downstream abutment portion 27 from above with a small gap between them. The second downstream abutment portion 27 can abut against the first downstream abutment portion 72 from below.

[0104] The lower surface of the portion of the first downstream abutment portion 72 located to the left of the oscillation axis X70 is a cylindrical surface centered on the oscillation axis X70. As a result, as shown in FIG. 5, the first downstream abutment portion 72 does not hinder the oscillation of the holder 70 about the oscillation axis X70.

[0105] <Second document holder, guide film and white reference film> 10 and 11, the second document holder 50 is made of a plate-like member. In this embodiment, the second document holder 50 is manufactured by pressing, bending, or the like, a steel plate.

[0106] The second document holder 50 has a document holder main body 51, an inclined portion 52, and a rear wall portion 53. The document holder main body 51 extends in the width direction like a flat plate and is inclined upward along the conveyance direction DT1.

[0107] The inclined portion 52 is connected to the upstream end 51U of the document holder body 51 in the transport direction DT1 and is bent downward and upstream in the transport direction DT1. The rear wall portion 53 is connected to the downstream end of the document holder body 51 in the transport direction DT1 and is bent downward.

[0108] The second document holder 50 has supported portions 59A and 59B, which are provided on both ends 51A and 51B of the document holder main body 51 in the width direction.

[0109] More specifically, the supported portion 59A located on one side in the width direction is a plate-like piece that bends downward from one end 51A in the width direction of the document presser body 51 and extends in the left-right direction. The supported portion 59B located on the other side in the width direction is a plate-like piece that bends downward from the other end 51B in the width direction of the document presser body 51 and extends in the left-right direction. Each of the supported portions 59A and 59B has a groove that extends in the up-down direction.

[0110] As shown in FIGS. 8 and 9, the support portions 79A and 79B of the holder 70 are fitted into the grooves of the supported portions 59A and 59B, thereby supporting the supported portions 59A and 59B so as to be able to move linearly.

[0111] In this way, as shown in Figure 4, the holder 70 holds both widthwise ends 51A, 51B of the document holder main body 51 with the support portions 79A, 79B, with the document holder main body 51 facing the reading glass 37R and the second reading sensor 3B from below, allowing the second document holder 50 to move towards and away from the reading glass 37R and the second reading sensor 3B.

[0112] 9, a white reference film 62 is attached to the second document holder 50. The white reference film 62 is used to allow the second reading sensor 3B to read a reference white color. The white reference film 62 covers the downstream portion of the inclined portion 52 in the conveying direction DT1 and the upstream portion of the document holder main body 51 in the conveying direction DT1.

[0113] The guide film 61 is attached to the inclined portion 52. The widthwise length LW1 of the guide film 61 is greater than the widthwise length LW2 of the white reference film 62. The downstream end 61D side of the guide film 61 in the conveying direction DT1 covers the entire upstream end 62U of the white reference film 62 in the conveying direction DT1.

[0114] In this embodiment, the guide film 61 is manufactured by cutting out a substantially rectangular shape from a PET (polyethylene terephthalate) film or the like. The guide film 61 has a thickness that allows it to exhibit sufficient rigidity to prevent bending when guiding the document SH, and in this embodiment, as an example, it is made of a PET film having a thickness of approximately 25 μm.

[0115] As shown in FIG. 4, an upstream end 70U of the holder 70 in the transport direction DT1 abuts against an upstream end 61U of the guide film 61 in the transport direction DT1 from below, protecting the upstream end 61U of the guide film 61 from deformation.

[0116] 10 and 11, the second document holder 50 has a second upstream contact portion 57. The second upstream contact portion 57 is provided on the upstream end 50U side of the second document holder 50 in the conveying direction DT1. As shown in FIGS. 4 and 9, the second upstream contact portion 57 is covered with a guide film 61.

[0117] 10, the second upstream contact portion 57 is provided on the inclined portion 52. The second upstream contact portion 57 is formed by bending a part of the inclined portion 52 that is located in a range covered by the guide film 61. The second upstream contact portion 57 is formed by forming two grooves in the inclined portion 52 and bending a plate-like piece located between the grooves into a downward crank shape.

[0118] 11, the second upstream contact portion 57 is located at the widthwise center 50C of the second document holder 50. The range in which the base 76 exists in the widthwise direction is defined as range A1. The range in which the first upstream contact portion 75 exists in the widthwise direction is defined as range A2. The range in which the first downstream contact portion 72 exists in the widthwise direction is defined as range A3.

[0119] The widthwise center 50C of the second document holder 50 is within the range A1 to A3. That is, the base 76, the first upstream contact portion 75, and the first downstream contact portion 72 are positioned so as to overlap the widthwise center 50C of the second document holder 50.

[0120] As shown in Figure 4, when the support portions 79A, 79B of the holder 70 are fitted into the grooves of the supported portions 59A, 59B, the second upstream abutment portion 57 is inserted below the first upstream abutment portion 75, thereby being able to abut against the first upstream abutment portion 75 from below.

[0121] The compression coil spring 60 urges the second document holder 50 toward the reading glass 37R and the second reading sensor 3B by abutting against a portion 51P of the document holder main body 51 that is located downstream in the conveying direction DT1 from a center 51C in the conveying direction DT1. At this time, the first upstream abutment portion 75 abuts against the second upstream abutment portion 57 of the second document holder 50 from above, and the urging force of the compression coil spring 60 acts to rotate the second document holder 50 counterclockwise on the page of FIG.

[0122] <Action and effect> As shown in Figures 5 and 6, in the image reading device 1 of the embodiment, when the document cover 9 opens the top surface of the main body 8, the holder 70 is swung to move the second document holder 50 away from the reading glass 37R and the second reading sensor 3B, thereby cleaning the reading glass 37R that has become dirty with paper dust, etc.

[0123] This image reading device 1 may be left with the document cover 9 moved to open the top surface of the main body 8. In this case, if no measures are taken, the reaction force of the compression coil spring 60 biasing the second document holder 50 may cause the holder 70 to bend so as to move away from the second reading sensor 3B and the second document holder 50, and the holder 70 may develop a tendency to bend if left unused for a long period of time.

[0124] If the document cover 9 is closed while the holder 70 has a tendency to bend, when the widthwise center of the holder 70 abuts the document support surface 8A, other parts of the holder 70 and the parts of the base frame 39 that support the holder 70 are lifted, making it easier for a reverse step to occur between the scoop guide 7 and the holder 70 and second document holder 50, which may result in a jam of the document SH that has passed over the reading surface 8B.

[0125] In this regard, as shown in Figure 12, in the image reading device 1 of the embodiment, when the reaction force FR1 of the biasing force of the compression coil spring 60 biasing the second document holder 50 acts on the base 76, the first upstream abutment portion 75 of the holder 70 abuts from above against the second upstream abutment portion 57 of the second document holder 50, and the first downstream abutment portion 72 of the holder 70 abuts from above against the second downstream abutment portion 27 of the base frame 39.

[0126] In this way, the first upstream abutment portion 75 and the first downstream abutment portion 72 reliably transmit the reaction force FR1 to the second document holder 50 and the base frame 39 at a position in the width direction that is approximately the same as the widthwise center 50C of the second document holder 50 and the base 76, and at a position that sandwiches the base 76 in the conveying direction DT1.

[0127] As a result, in this image reading device 1, even if the document cover 9 is moved so as to open the top surface of the main body 8 and left as it is, the distance LD1 by which the upstream end 70U of the holder 70 in the conveying direction DT1 is displaced due to bending can be made small.

[0128] In this way, the image reading device 1 can prevent the holder 70 from bending so as to move away from the second reading sensor 3B and the second document holder 50, so the holder 70 is less likely to develop a bending habit even when left unused for a long period of time. As a result, the image reading device 1 can prevent deviation in the relative positional relationship between the scoop guide 7 and the holder 70, so that a reverse step is less likely to occur between the scoop guide 7 and the holder 70 and the second document holder 50.

[0129] Therefore, the image reading device 1 of the embodiment can prevent the holder 70 holding the second document holder 50 from becoming bent even if the document cover 9 is left open, and can therefore prevent the document SH that has passed over the reading surface 8B from clogging.

[0130] Furthermore, in this image reading device 1, the holder 70 is elongated in the width direction, and is thinner at the upstream end 70U in the conveying direction DT1 than at the downstream end 70D. The holder 70 is made of resin, which is prone to creep deformation, but is less likely to develop a bending tendency due to the action of the first upstream contact portion 75 and the first downstream contact portion 72. Therefore, in this image reading device 1, it is not necessary to increase the thickness of the holder 70 to provide sufficient strength to prevent the holder 70 from developing a bending tendency due to the reaction force FR1 of the compression coil spring 60, and therefore it is possible to prevent the document cover 9 from becoming larger. Furthermore, in this image reading device 1, it is possible to prevent increases in weight and manufacturing costs compared to when the holder 70 is reinforced with a metal member or made of metal.

[0131] 8, the holder 70 has pivotally supported portions 78A and 78B. The base frame 39 has the storage portion 20, pivotally supported portions 28A and 28B, and the second downstream contact portion 27. As shown in FIG. 4, the second downstream contact portion 27 is disposed in a position that does not interfere with the swinging of the holder 70, and restricts the movement of the first downstream contact portion 72. This makes it possible for the image reading device 1 to reliably prevent the holder 70 from bending so as to move away from the second reading sensor 3B and the second document holder 50.

[0132] Furthermore, in this image reading device 1, as shown in FIG. 10, the second document holder 50 has supported portions 59A and 59B and a second upstream contact portion 57. The holder 70 has supporting portions 79A and 79B. With this configuration, as shown in FIG. 4, when the second document holder 50 is biased by the compression coil spring 60 and approaches the reading glass 37R and the second reading sensor 3B, the first upstream contact portion 75 and the second upstream contact portion 57 contact each other, suppressing movement of the upstream end 50U of the second document holder 50 in the conveying direction DT1. This makes it easier for the second document holder 50 to tilt relative to the reading glass 37R and the second reading sensor 3B. As a result, it is even less likely that a reverse step will occur between the scoop guide 7 and the holder 70 or the second document holder 50.

[0133] Furthermore, in this image reading device 1, a downstream end 61D of the guide film 61 in the conveying direction DT1 is located upstream of the second reading sensor 3B in the conveying direction DT1. An upstream end 61U of the guide film 61 in the conveying direction DT1 is located upstream of an upstream end 70U of the holder 70 in the conveying direction DT1 in the conveying direction DT1. The second upstream abutment portion 57 is covered by the guide film 61. With this configuration, the second upstream abutment portion 57 covered by the guide film 61 is less likely to obstruct the conveyance of the document SH guided between the second reading sensor 3B and the second document holder 50.

[0134] 10, the second document holder 50 is made of a plate-like member. The second upstream contact portion 57 is formed by bending a portion of the second document holder 50 that is located in an area covered by the guide film 61. With this configuration, even if a groove resulting from the bending process is formed around the second upstream contact portion 57 in the second document holder 50, the second upstream contact portion 57 covered by the guide film 61 is unlikely to obstruct the transport of the document SH guided between the second reading sensor 3B and the second document holder 50.

[0135] 4, in this image reading device 1, the upstream end 7U of the scoop guide 7 in the conveying direction DT1 is located below the reading surface 8B. The upstream end 61U of the guide film 61 in the conveying direction DT1 is located below the downstream end 7D of the scoop guide 7 in the conveying direction DT1. With this configuration, the reading surface 8B, scoop guide 7, and guide film 61 are in a relative positional relationship that does not create a reverse step, so that the document SH that has passed over the reading surface 8B can be smoothly guided between the second reading sensor 3B and the second document holder 50.

[0136] Furthermore, in this image reading device 1, the second document holder 50 has a document holder main body 51 and an inclined portion 52. The second upstream contact portion 57 is provided on the inclined portion 52. The compression coil spring 60 contacts a portion 51P of the document holder main body 51 that is located downstream in the conveying direction DT1 from a center 51C in the conveying direction DT1, thereby urging the second document holder 50 toward the second reading sensor 3B. With this configuration, when the second document holder 50 is urged by the compression coil spring 60 and approaches the second reading sensor 3B, the contact between the first upstream contact portion 75 and the second upstream contact portion 57 suppresses movement of the inclined portion 52. Furthermore, the compression coil spring 60 makes it easier for the downstream end of the document holder main body 51 in the conveying direction DT1 to approach the second reading sensor 3B, making it easier for the second document holder 50 to incline relative to the second reading sensor 3B. As a result, a reverse step is unlikely to occur between the scoop guide 7 and the second document holder 50 and the guide film 61.

[0137] In the image reading device 1, the cross-sectional shape of the upstream end 70U of the holder 70 in the conveying direction DT1 tapers toward the upstream side in the conveying direction DT1. With this configuration, the upstream end 70U of the holder 70 in the conveying direction DT1 can protect the back side of the guide film 61 while suppressing excessive deformation of the guide film 61.

[0138] 9, in this image reading device 1, the downstream end 61D side of the guide film 61 in the conveying direction DT1 is attached to the second document holder 50 so as to cover the upstream end 62U of the white reference film 62 in the conveying direction DT1. With this configuration, the guide film 61 can prevent the document SH guided between the second reading sensor 3B and the second document holder 50 from peeling off or damaging the white reference film 62.

[0139] Furthermore, in this image reading device 1, the widthwise length LW1 of the guide film 61 is greater than the widthwise length LW2 of the white reference film 62. The downstream end 61D side of the guide film 61 in the conveying direction DT1 covers the entire upstream end 62U in the conveying direction DT1 of the white reference film 62. With this configuration, the guide film 61 can reliably prevent the original SH guided between the second reading sensor 3B and the second original holder 50 from peeling off or damaging the white reference film 62.

[0140] Although the present invention has been described above with reference to the examples, it goes without saying that the present invention is not limited to the above examples and can be modified and applied as appropriate within the scope of the invention.

[0141] In the embodiment, the image reading device of the present invention is embodied as an image reading device 1 having an image forming function and an image reading function, but the present invention is not limited to this configuration. For example, the configuration of the present invention may be applied to an image reading device having only an image reading function.

[0142] In the embodiment, the first reading unit is the first reading sensor 3A, but the present invention is not limited to this configuration, and for example, the first reading unit may read the image of the document using multiple mirror members, multiple carriages, an imaging lens, and an imaging unit. The same applies to the second reading unit. [Explanation of symbols]

[0143] 1...image reading device, SH...original, 8B...reading surface 7...Scooping guide, 8...Main body, 9...Document cover DT1: Transfer direction, 4: Automatic transfer mechanism 3A...First reading unit (first reading sensor) 3B...Second reading unit (second reading sensor) 39, 37, 34...Frame (39...Base Frame, 37...Lower Shoot, 34...Upper Shoot) 50...Document holder (second document holder) 51A, 51B...Both ends of the document holder in the width direction X70...oscillating axis, 70...holder 60... Urging member (compression coil spring) 76...base, 75...first upstream contact portion, 72...first downstream contact portion 50C: Center of the document holder in the width direction 70D...Downstream end of the holder in the conveying direction 70A, 70B...Both ends in the width direction of the holder 78A, 78B...Shafted branch, 20...Accommodation part 20A, 20B...Both ends in the width direction of the storage section 28A, 28B... shaft support portion, 20D... downstream end of the storage portion in the conveying direction 27...Second downstream contact part, 59A, 59B...Supported part 50U...Upstream end of the document holder in the transport direction 57...Second upstream contact part, 79A, 79B...Support part 61...Guide film 61D...Downstream end of guide film in the conveying direction 61U...Upstream end of guide film in the conveying direction 7U...Upstream end of scoop guide in the conveying direction 7D...Downstream end of scoop guide in the conveying direction 51... document holder body, 52... inclined portion 51U...Upstream end of the document holder body in the conveying direction 51C: Center of the document holder body in the transport direction 51P: A portion of the document holder body that is located downstream of the center in the conveying direction. 70U...Upstream end of the holder in the conveying direction 62...White reference film 62U: Upstream end of the white reference film in the transport direction LW1: Length of the guide film in the width direction LW2: Width of the white reference film

Claims

1. a main body having a reading surface on an upper surface through which the document passes and a scooping guide for scooping up the document passing the reading surface; a document cover connected to the main body, covering the top surface, and movable to open the top surface; an automatic transport mechanism provided in the document cover and configured to transport the document in a transport direction so that the document passes through the reading surface and the scoop guide; a first reading unit provided in the main body and capable of reading an image on a downward-facing surface of a document passing through the reading surface; a second reading unit that is provided downstream of the scooping guide in the document cover in the transport direction and that is capable of reading an image on an upwardly facing surface of the document scooped up by the scooping guide; An image reading device comprising: the document cover includes a frame supporting the automatic transport mechanism and the second reading unit; a document presser that is located downstream of the scooping guide in the transport direction and below the second reading unit, extends perpendicular to the transport direction and in a width direction parallel to the reading surface, and presses the document scooped up by the scooping guide toward the second reading unit; and a holder that holds both ends of the document presser in the width direction, and is pivotally supported by the frame so as to be swingable about a swing axis extending in the width direction downstream of the document presser in the transport direction, the holder swinging to separate the document presser from the second reading unit; a biasing member provided between the document holder and the holder, the biasing member biasing the document holder toward the second reading unit, the holder has a base positioned below the document presser and receiving the biasing member; a first upstream contact portion located upstream of the base in the conveying direction and capable of contacting the document presser from above; a first downstream contact portion located downstream of the document holder and the base in the transport direction and capable of contacting the frame from above, The image reading device is characterized in that the base, the first upstream contact portion, and the first downstream contact portion are located at positions that overlap with a center of the document holder in the width direction.

2. the holder has a shaft-supported portion provided on a downstream end side of the holder in the conveying direction and on both ends in the width direction, the frame includes a housing portion capable of housing the holder; a support portion provided at each end of the accommodation portion in the width direction and supporting the supported portion to allow the holder to swing around the swing axis; 2. The image reading device according to claim 1, further comprising: a second downstream contact portion provided at a downstream end of the storage portion in the transport direction and capable of contacting the first downstream contact portion from below.

3. The document holder includes supported portions provided at both ends of the document holder in the width direction; a second upstream contact portion provided on an upstream end side of the document holder in the transport direction and capable of contacting the first upstream contact portion from below, The image reading device according to claim 1 or 2, wherein the holder has a support portion provided at both ends of the width direction of the holder, and supports the supported portion in a linear manner, thereby enabling the document holder to move closer to and away from the second reading portion.

4. a guide film is attached to the document holder, the guide film being capable of guiding the document scooped up by the scoop guide; a downstream end of the guide film in the transport direction is located upstream of the second reading unit in the transport direction; an upstream end of the guide film in the transport direction is located upstream of the holder in the transport direction; 4. The image reading device according to claim 3, wherein the second upstream contact portion is covered by the guide film.

5. The document holder is made up of a plate-like member, 5. The image reading device according to claim 4, wherein the second upstream contact portion is formed by bending a part of the document holder that is positioned in a range covered by the guide film.

6. an upstream end of the scoop guide in the conveying direction is located below the reading surface; 5. The image reading device according to claim 4, wherein the upstream end of the guide film in the transport direction is positioned lower than the downstream end of the scoop guide in the transport direction.

7. The document holder includes a document holder main body facing the second reading unit; an inclined portion connected to an upstream end of the document presser body in the transport direction and bent downward and upstream in the transport direction; the second upstream contact portion is provided on the inclined portion, The image reading device according to claim 4 , wherein the biasing member biases the document holder toward the second reading unit by contacting a portion of the document holder body that is located downstream in the transport direction from a center of the document holder body in the transport direction.

8. 5. The image reading device according to claim 4, wherein the cross-sectional shape of the upstream end of the holder in the conveying direction tapers toward the upstream side in the conveying direction.

9. a white reference film is attached to the document holder to allow the second reading unit to read a reference white color; 5. The image reading device according to claim 4, wherein the downstream end of the guide film in the transport direction is attached to the document holder so as to cover the upstream end of the white reference film in the transport direction.

10. the length of the guide film in the width direction is greater than the length of the white reference film in the width direction; 10. The image reading device according to claim 9, wherein the downstream end of the guide film in the transport direction covers the entire upstream end of the white reference film in the transport direction.

Images