JP5168484B2 - Conveying apparatus and image reading apparatus - Google Patents

Description

The present invention relates to an image reading equipment for reading an image of a document conveyed by the conveying device and the conveying device for conveying the original.

  2. Description of the Related Art Conventionally, a copying apparatus or a facsimile, which is a kind of image forming apparatus, includes a conveyance device that conveys a document and an image reading device that reads an image of the document at an image reading position. Some of them automatically read and read the original. Further, in the image reading apparatus provided in such an image forming apparatus, light is irradiated from the other surface side of the transparent plate to the image reading position set on one surface side of the transparent plate such as a glass plate, and transmitted through the transparent plate. The light reflected on the original at the image reading position is received and converted into an electric signal, thereby reading the original image.

  Recently, as in the document feeder (conveyance device) described in Patent Document 1, a transparent sheet member that forms a U-turn path document conveyance path is provided above the transparent plate, and the surface of the document is formed by the transparent sheet member. In some cases, the document is smoothly conveyed while ensuring a high light transmittance by conveying it to the image reading position while guiding the side (lower surface side).

  By the way, when the transparent sheet member and the transparent plate are arranged so as to overlap each other at the image reading position, an air layer having a slight thickness is formed between the transparent plate and the transparent sheet member. Therefore, when light is irradiated for reading a document, the reflected light reflected by the surface of the transparent plate facing the transparent sheet member interferes with the reflected light reflected by the surface of the transparent sheet member facing the transparent plate. As a result, irregular fringe interference fringes may occur. Then, when the image reading apparatus reads the generated interference fringes, there has been a problem that the interference fringes appear on the read image.

For this reason, in the document feeder of Patent Document 1, the generation of interference fringes is suppressed by providing a distance holding means for holding the distance between the transparent sheet member and the transparent plate at a predetermined amount.
JP 2004-250147 A

  However, the interval holding means included in the document feeder of Patent Document 1 supports the transparent sheet member at two end portions in the document width direction across the document reading position, or the transparent sheet member on the upstream side or downstream side of the document reading position. Therefore, the distance between the transparent sheet member and the transparent plate at the document reading position depends on the amount of deflection of the transparent sheet member. Therefore, the adjustment work for setting the interval between the transparent sheet member and the transparent plate to an appropriate value is complicated.

  In addition to the above-described conveyance device, a conveyance device that conveys a document to an image reading position set on one side of the transparent plate while guiding with a transparent sheet member, and an image that reads an image of a document conveyed by such a conveyance device This situation is generally common in the reading apparatus and the image forming apparatus that records the image read by the image reading apparatus.

The present invention has been made in view of such circumstances. The object is to easily suppress the occurrence of irregular interference fringes when a document is conveyed to the image reading position while being guided by a transparent sheet member arranged so as to overlap the transparent plate at the image reading position. conveying device, and to provide an image reading equipment having such a conveying apparatus.

In order to achieve the above object, the conveying device of the present invention irradiates light from the other surface side of the transparent plate to an image reading position set on one surface side of the transparent plate, and transmits the light through the transparent plate. A transport device that transports a document to the image reading position of an image reading device that reads an image of the document by receiving light reflected on the document at an image reading position, and In order to guide the surface facing the transparent plate, the surface reflection is suppressed to at least a portion corresponding to the image reading position of the surface facing the transparent plate. a transparent sheet member surface-treated for, a pressing member for guiding the back side of the surface facing the transparent plate of the document, the pressing member in a state of being interposed between the transparent sheet member the transparent A spring for pressing toward the side, with a.

  According to this configuration, the transparent sheet member that guides the document in the vicinity of the image reading position is subjected to surface treatment for suppressing surface reflection on at least a portion corresponding to the image reading position on the surface facing the transparent plate. Yes. Therefore, it is suppressed that the reflected light reflected by the surface facing the transparent plate of the transparent sheet member interferes with the reflected light reflected by the surface facing the transparent sheet member of the transparent plate. Therefore, the occurrence of irregular interference fringes can be easily suppressed without making complicated adjustments when arranging the transparent sheet member.

In the transport device of the present invention, the surface of the transparent sheet member on the side of the pressing member is subjected to a hard coat process in order to suppress damage when the document is guided .

In the transport apparatus of the present invention, the surface treatment is a thin film forming treatment for forming an antireflection film on the surface.
According to this configuration, since the surface reflection of the transparent sheet member can be suppressed by the thin film forming process for forming the antireflection film on the surface, the generation of irregular interference fringes can be suppressed.

In the transport device of the present invention, the transmittance of the transparent sheet member subjected to the surface treatment is equal to or greater than the transmittance of the transparent plate.
According to this configuration, since the transmittance of the surface-treated transparent sheet member is equal to or greater than the transmittance of the transparent plate, the interference fringes are ensured while ensuring the transmission of the light that irradiates the document and the light that is reflected on the document. Can be suppressed.

  In order to achieve the above object, an image reading apparatus of the present invention irradiates light from the other surface side of the transparent plate to the conveying device, the transparent plate, and an image reading position set on one surface side of the transparent plate. A light source unit that receives the light emitted from the light source unit, transmitted through the transparent plate and reflected by the document at the image reading position, and converts the light into an electrical signal. read.

According to this structure, the same effect as the said conveying apparatus can be acquired .

  Hereinafter, an embodiment in which an image forming apparatus of the present invention is embodied in a multifunction machine will be described with reference to FIGS. In the following description, when referring to “front-rear direction”, “left-right direction”, and “up-down direction”, the front-rear direction, the left-right direction, and the up-down direction indicated by arrows in the drawings are respectively shown.

  As shown in FIG. 1, the multifunction machine 11 as an image forming apparatus includes a printer unit 12 as a recording unit and a scanner device 13 as an image reading device arranged on the printer unit 12. The scanner device 13 includes a scanner unit 14 and a transport unit 15 as a transport device disposed on the scanner unit 14.

  As shown in FIG. 2, the left end sides of the scanner unit 14 and the transport unit 15 are connected via a hinge 14a. Further, a finger hook portion 15 a is formed on the lower surface of the transport unit 15 near the right end. Then, when the user places a hand on this finger hook 15a and lifts the right end side of the transport unit 15 in the direction indicated by the arrow in FIG. 2, the transport unit 15 is moved from the closed position shown in FIG. 1 to the open position shown in FIG. To move to.

  When the scanner device 13 reads an image on the paper P one by one or when reading a page portion of a book, the transport unit 15 is moved to the open position and the paper P or the paper P is directly placed on the scanner unit 14. The page part of the book you want to read is set. As described above, in the case of so-called book reading in which the paper P is manually arranged and the image is read, the paper P is set directly on the scanner unit 14, so that the paper P is not transported by the transport unit 15.

  On the other hand, when continuously reading a plurality of sheets P, the transport unit 15 is moved to the closed position, and the sheets P set in the transport unit 15 are automatically transported to the scanner unit 14 side. That is, the paper P is transported by the transport unit 15 in the case of so-called flow reading in which the paper P is automatically transported to the scanner unit 14 side for reading. The transport of the paper P by the transport unit 15 and the reading of the image by the scanner unit 14 are both performed with the transport unit 15 moved to the closed position.

  Next, the transport unit 15 will be described with reference to FIGS. In the description based on FIGS. 1, 3, and 4, “horizontal direction” and “vertical direction” are referred to based on the arrangement in the closed position.

  As shown in FIG. 1, the transport unit 15 includes a paper feed tray 16 on which a plurality of paper sheets P as originals can be set in a stacked state, and a paper discharge tray 17 positioned below the paper feed tray 16. . The paper feed tray 16 is inclined so as to be lowered rearward, and the upper surface thereof forms a set surface 16 a for setting the paper P. In the present embodiment, each sheet P is set on the sheet feed tray 16 with the surface on which the image to be read (the letter “P” in the present embodiment) is recorded facing upward. It has become. A reversing cover 18 is provided at the rear of the paper feed tray 16 in the transport unit 15 so as to be openable and closable.

  As shown in FIG. 3, a reverse path forming member 20 that forms a transport path of the paper P indicated by an arrow in FIG. 3 is provided below the reverse cover 18 in the transport unit 15 so as to be continuous with the rear end of the set surface 16a. Is provided. The inversion path forming member 20 has a U-shaped curved shape so as to swell rearward in a side view, and is connected so that the upper end is integrated with the paper feed tray 16. In addition, the lower end side of the reversing path forming member 20 extends obliquely toward the front lower side and is connected to the rear end of the accommodating portion 21 that forms the concave portion 21a that opens downward.

  A paper pressing member 23 is provided in the concave portion 21 a of the housing portion 21 through the spring 22 so as to extend in the left-right direction. The sheet pressing member 23 is substantially U-shaped in a cross-sectional view, and has a guide surface 23a having a continuous curved surface extending from the side surface to the lower end side, and a lower end side flat surface smoothly connected to the front end of the guide surface 23a. A guide surface 23b made of a surface, and a guide surface 23c that forms a gentle curved surface from the front end of the guide surface 23b to the front side wall and is connected.

  The front end of the accommodating portion 21 is connected to the rear end of the discharge guide portion 24 that extends obliquely toward the upper front side, and the discharge tray 17 is positioned in front of the discharge guide portion 24. Yes.

  The set surface 16 a of the paper feed tray 16, the outer surface side of the reverse path forming member 20, the guide surfaces 23 a, 23 b, 23 c of the paper pressing member 23, and the lower surface side of the paper discharge guide portion 24 are for guiding the back surface of the paper P. A guide portion 25 is configured. Each sheet P set on the set surface 16a of the sheet feeding tray 16 is reversed in the process of being conveyed along the reversing path forming member 20 along the conveying path indicated by the arrows in FIGS. It has become. Therefore, the paper P set on the paper feed tray 16 so that the front surface faces upward is reversed in the process of being conveyed, and is discharged onto the paper discharge tray 17 with the front surface facing downward. It has become.

  Behind the reverse path forming member 20 in the transport unit 15, a paper feed guide 26 for guiding the surface of the paper P transported along the guide portion 25 of the reverse path forming member 20 is provided. A discharge guide 27 for guiding the surface of the paper P to be discharged along the guide portion 25 of the discharge guide 24 is provided below the discharge guide 24.

  Under the paper pressing member 23, the rear end side is attached and fixed to the upper surface side near the lower end of the paper feed guide 26, and the front end side is supported on the upper surface side near the rear end of the paper discharge guide 27. A sheet member 28 is provided. The front surface side of the paper feed guide 26 and the upper surface side of the transparent sheet member 28 and the paper discharge guide 27 constitute a guide portion 29 for guiding the surface of the paper P.

  As shown in FIG. 2, an opening 15 b extending in the left-right direction is formed in a portion near the rear end on the lower surface side of the transport unit 15. The guide surface 23b of the paper pressing member 23 protrudes outward from the opening 15b, and the lower end portion of the reverse path forming member 20 and the rear end portion of the paper discharge guide portion 24 are exposed at the opening 15b. In FIG. 2, the transparent sheet member 28 is not shown in order to show a portion that can be seen through the opening 15b. However, the transparent sheet member 28 covers the guide surface 23b of the paper pressing member 23 and opens the opening 15b. It arrange | positions in the aspect which plugs up.

  The transparent sheet member 28 is made of polyethylene terephthalate (PET) as a base material, and one surface (upper surface in FIG. 3) facing the sheet pressing member 23 is damaged when the sheet P is guided. In order to suppress, a hard coat process is performed. Further, the other surface of the transparent sheet member 28, that is, the surface facing the upper surface of the scanner unit 14 in the closed position (the lower surface in FIG. 3) is a rough surface that forms fine irregularities on the surface in order to suppress surface reflection of light. Surface treatment is applied. Therefore, as shown in FIG. 4, a hard coat layer 28 a is formed on the upper surface side of the transparent sheet member 28 in the closed position, and a reflection suppressing layer 28 b is formed on the lower surface side of the transparent sheet member 28.

  As shown in FIG. 3, a feed roller 30 is provided above the vicinity of the rear end of the paper feed tray 16 so as to be rotatable about a rotation shaft 31 supported by a frame (not shown). Further, behind the feed roller 30, a separation roller 34 that is rotatably provided around a rotation shaft 33 supported by the same frame (not shown) is disposed. The rotating shaft 31 and the rotating shaft 33 are connected by a connecting member 32. Further, the connecting member 32 can swing around the rotation shaft 33, and the feed roller 30 can move in the vertical direction as the connecting member 32 swings.

  A separation pad 35 is provided on the upper surface of the reverse path forming member 20 below the separation roller 34, and the separation pad 35 receives a biasing force of a biasing member (not shown) and always contacts the separation roller 34. It comes to touch.

  The paper P is fed out by rotating in a state where the feed roller 30 swings downward and is in contact with the uppermost paper P set on the set surface 16a. Further, the uppermost sheet P and the lower layer sheet P are separated by a separation roller 34 and a separation pad 35 that rotate in synchronization with the feed roller 30. Therefore, the paper P is sent out one by one downstream from the separation pad 35 in the conveyance path indicated by the arrow in FIG.

  In the vicinity of the lower ends of the paper feed guide 26 and the reverse path forming member 20, a pair of paper feed rollers 36 are provided so as to be rotatable about respective rotation shafts 37. When one of the rotary shafts 37 is rotationally driven, the paper P fed by the feed roller 30 and the separation roller 34 is conveyed toward the downstream side while being pinched by both the paper feed rollers 36. .

  A pair of paper discharge rollers 38 are provided at the front ends of the paper discharge guide 24 and the paper discharge guide 27 so as to be rotatable about respective rotation shafts 39. The upper rotating shaft 39 is driven to rotate, so that the paper P conveyed by both paper feed rollers 36 is discharged onto the paper discharge tray 17 while being pinched by both paper discharge rollers 38.

  As shown in FIGS. 2 and 3, an elastic sheet pressing mat 40 is disposed on the front side of the opening 15 b of the transport unit 15. The lower surface of the paper pressing mat 40 forms a paper pressing portion 40a.

Next, the scanner unit 14 will be described with reference to FIGS.
As shown in FIGS. 2 and 3, a glass flat plate 45 as a transparent plate is disposed on the upper surface of the scanner unit 14. A bank forming member 46 extending in the left-right direction is fixed on the glass flat plate 45 at a position between the paper pressing member 23 and the paper pressing mat 40 that are in the closed position in the front-rear direction. A bank portion 46a is formed on the rear side of the bank forming member 46. The bank portion 46a is a slope extending upward in the front side. The bank portion 46 a of the bank forming member 46 guides the paper P toward the paper discharge guide 27.

  On the upper surface side of the glass flat plate 45, a first reading unit 47 on the front side of the bank forming member 46 and a second reading unit 48 on the rear side of the bank forming member 46 are set. When the transport unit 15 is moved from the open position to the closed position, the paper pressing portion 40a of the paper pressing mat 40 contacts the first reading portion 47 and the guide surface 23b of the paper pressing member 23 is transparent. The sheet member 28 is pressed against the second reading portion 48 by the biasing force of the spring 22 with the sheet member 28 interposed therebetween. That is, the transparent sheet member 28 is disposed so as to face one surface side (upper surface side) of the glass flat plate 45 in the closed position. Further, the reflection suppressing layer 28b that has been subjected to a roughening process for suppressing the surface reflection of light of the transparent sheet member 28 is formed on the surface facing the glass flat plate 45 in the closed position.

  In the case of book reading in which the paper P is manually arranged, the transport unit 15 is moved to the open position and the paper P is set in the first reading unit 47. Further, in the case of the flow reading for automatically transporting the paper P, the transport unit 15 is moved to the closed position and the paper P is set in the paper feed tray 16, so that the paper P is transferred to the second reading unit 48 by the transport unit 15. It is designed to be transported.

  As shown in FIG. 3, a reading carriage 50 configured to be movable in the front-rear direction along the guide member 49 is provided below the glass flat plate 45. The reading carriage 50 has a width substantially corresponding to the glass flat plate 45 in the left-right direction, and the inside thereof is irradiated with light extending linearly in the left-right direction toward the first reading unit 47 or the second reading unit 48. A light source unit 51 is accommodated. In the reading carriage 50, a plurality of mirrors 52 that reflect the reflected light of the light emitted from the light source unit 51, a lens 53 that forms an image of the light reflected by the mirror 52, and the lens 53 are transmitted. And a light receiving portion 54 that receives the received light and converts it into an electrical signal. That is, the light source unit 51 irradiates the first reading unit 47 or the second reading unit 48 set on one surface side (upper surface side) of the glass flat plate 45 from the other surface side (lower surface side) of the glass flat plate 45. At the same time, the light receiving unit 54 receives the light that has passed through the glass flat plate 45 and reflected on the paper P in the first reading unit 47 or the second reading unit 48, thereby reading the image on the paper P. Yes.

  As shown in FIG. 1, a start switch 55 is provided on the right side surface of the scanner unit 14. When the sheet P is set in the first reading unit 47 so that the surface thereof faces the glass flat plate 45, the transport unit 15 is moved to the closed position and the start switch 55 is pressed, the reading carriage 50 is The first reading unit 47 is moved downward. Then, the reading carriage 50 moves in the front-rear direction while irradiating light that extends linearly in the left-right direction toward the paper P, and reaches the surface of the paper P through the mirror 52 and the lens 53 corresponding to the linear light. By receiving the reflected light reflected by the light receiving unit 54, the entire image is read.

  On the other hand, when the start switch 55 is pressed while the paper P is set in the paper feed tray 16, the reading carriage 50 moves below the second reading portion 48 and stops as shown in FIG. . Then, when the paper P transported by the transport unit 15 passes through the image reading position Q, the paper P is irradiated with light extending linearly in the left-right direction from the light source unit 51, and passes through the glass flat plate 45 and the transparent sheet member 28. By receiving the reflected light reflected on the surface of P by the light receiving unit 54, the entire image is read. Here, the image reading position Q is set to a position corresponding to the vicinity of the center in the front-rear direction of the guide surface 23 b of the paper pressing member 23 in the closed position in the second reading unit 48. Further, in the vicinity of the image reading position Q, the sheet P is guided by the transparent sheet member 28 on the surface facing the glass flat plate 45 and on the back surface by the guide surface 23b of the sheet pressing member 23. In FIG. 3, the trajectory of the irradiation light and the reflected light when the image reading position Q is irradiated with light is indicated by a two-dot chain line.

  The image read by the scanner unit 14 is printed on an unused sheet P (not shown) by the printer unit 12 in accordance with a command from the user.

Next, the operation of the scanner device 13 configured as described above will be described.
First, in the case of book reading in which the paper P is manually arranged, the transport unit 15 is moved to the open position, and the paper P is set on the first reading unit 47 with the front side facing downward. Thereafter, when the transport unit 15 is moved to the closed position, the surface of the paper P is pressed against the glass flat plate 45 by the paper pressing portion 40 a of the paper pressing mat 40.

  When the start switch 55 is pressed in this state, the reading carriage 50 moves below the first reading unit 47 and moves in the front-rear direction while irradiating light from the light source unit 51 toward the paper P. Then, the light reflected on the surface of the paper P while the reading carriage 50 moves is reflected by each mirror 52, imaged by the lens 53, and received by the light receiving unit 54. Then, the reflected light received by the light receiving unit 54 is converted into an electrical signal, whereby an image is read. Since the surface of the paper P is pressed against the glass flat plate 45 by the paper pressing mat 40, it is possible to prevent the read image from being blurred due to a gap between the paper P and the glass flat plate 45.

  On the other hand, in the case of flow reading for automatically transporting the paper P, the paper P is set on the paper feed tray 16 of the transport unit 15 in the closed position and the start switch 55 is pressed. Then, the reading carriage 50 moves below the second reading unit 48 and the feeding roller 30 rotates to feed out the uppermost sheet P. Then, the paper P reversed while being guided by the reverse path forming member 20 and the paper feed guide 26 is conveyed toward the image reading position Q by the rotational drive of the paper feed roller 36.

  In the vicinity of the image reading position Q, the guide surface 23b of the paper pressing member 23 is pressed against the second reading portion 48 by the biasing force of the spring 22 with the transparent sheet member 28 interposed therebetween. Accordingly, the sheet P is guided by the guide surface 23b of the sheet pressing member 23 and the front surface thereof by the transparent sheet member 28, while pushing the sheet pressing member 23 upward against the urging force of the spring 22, and the image reading position. Pass Q. Since the hard coat layer 28a is formed on the upper surface side of the transparent sheet member 28, even if the paper P slides against the urging force of the spring 22, the transparent sheet member 28 is damaged and read. It is possible to suppress the deterioration of the image quality of the image.

  Then, with the reading carriage 50 stopped, light is emitted from the light source unit 51 to the paper P passing through the image reading position Q, and the light reflected on the surface of the paper P is received by the light receiving unit 54. Then, the reflected light received by the light receiving unit 54 is converted into an electrical signal, whereby an image is read. The paper P that has passed the image reading position Q is guided to the paper discharge guide section 24, the bank section 46a of the bank forming member 46, and the paper discharge guide 27, and is moved to the paper discharge tray 17 as the paper discharge roller 38 rotates. The paper is ejected. In this way, the images P are continuously read by automatically conveying the sheets P on the sheet feed tray 16 one by one to the second reading unit 48.

  Since the paper P is pressed against the glass flat plate 45 by the urging force of the spring 22 at the image reading position Q, a gap is generated between the paper P and the glass flat plate 45 so that the read image is blurred. Is suppressed.

  However, since the transparent sheet member 28 and the glass flat plate 45 are arranged in the vicinity of the image reading position Q, an air layer with a very small thickness is formed between the transparent sheet member 28 and the glass flat plate 45. The Therefore, when light is irradiated, the reflected light reflected by the surface of the glass flat plate 45 facing the transparent sheet member 28 interferes with the reflected light reflected by the surface of the transparent sheet member 28 facing the glass flat plate 45. In some cases, irregular fringe interference fringes are generated. However, in this embodiment, since the reflection suppressing layer 28b is formed on the transparent sheet member 28, the reflection of light on the surface of the transparent sheet member 28 facing the glass flat plate 45 is suppressed, and the generation of interference fringes is suppressed. Is done.

  The transmittance of the transparent sheet before the surface roughening treatment is 91.5%, whereas the transmittance of the transparent sheet member 28 subjected to the surface roughening treatment is 90.8%. . Further, in the present embodiment, the transmittance of the transparent sheet member 28 subjected to the roughening treatment is higher than the transmittance of 88% of the glass flat plate 45. Therefore, it is possible to suppress the surface reflection of light without greatly degrading the image quality.

According to the embodiment described in detail above, the following effects can be obtained.
(1) The transparent sheet member 28 that guides the paper P in the vicinity of the image reading position Q is subjected to surface treatment for suppressing surface reflection on the surface facing the glass flat plate 45 in the closed position. Therefore, it is suppressed that the reflected light reflected by the surface facing the glass flat plate 45 of the transparent sheet member 28 interferes with the reflected light reflected by the surface facing the transparent sheet member 28 of the glass flat plate 45. Therefore, the occurrence of irregular interference fringes can be easily suppressed without making complicated adjustments when the transparent sheet member 28 is arranged.

(2) Since the surface reflection of the transparent sheet member 28 can be suppressed by the roughening treatment that forms fine irregularities on the surface, the generation of irregular interference fringes can be suppressed.
(3) Since the transmittance of the surface-treated transparent sheet member 28 is 90.8%, which is higher than the transmittance of the glass flat plate 45, the light irradiated on the paper P or the light reflected on the paper P The generation of interference fringes can be suppressed while ensuring the transmission of light.

In addition, you may change the said embodiment as follows.
The surface treatment does not necessarily have to be performed on the entire transparent sheet member 28, as long as at least the surface treatment corresponding to the image reading position Q is performed.

-The base material of the transparent sheet member 28 is not limited to PET resin, and other base materials may be used as long as surface treatment is possible and appropriate transmittance can be secured.
-The hard coat process of the transparent sheet member 28 does not need to be performed.

  A surface treatment for suppressing surface reflection may be applied to the surface of the glass flat plate 45 opposed to the transparent sheet member 28 instead of the transparent sheet member 28, or each of the transparent sheet member 28 and the glass flat plate 45 facing each other. A surface treatment for suppressing surface reflection may be applied to the portion corresponding to the image reading position Q on the surface. Further, the surface treatment applied to the transparent sheet member 28 and the glass flat plate 45 is not limited to the roughening treatment, and may be a thin film forming treatment for forming an antireflection film on the surface.

The document to be conveyed and read is not limited to paper, but may be a plastic film or sheet.
The present invention is not limited to the multifunction machine 11 including the printer unit 12 and the scanner device 13, and may be embodied in a scanner device, a facsimile machine, a copying machine, or the like that does not include the printer unit 12. Alternatively, the present invention may be embodied in a multifunction machine having both of these functions.

  The printer unit 12 can be embodied as an ink jet printer or an electrophotographic printer using a charged image.

1 is a perspective view of a multifunction machine according to an embodiment. The schematic perspective view for demonstrating the conveyance unit and scanner unit in an open position. FIG. 3 is a schematic cross-sectional view for explaining a transport unit and a scanner unit in a closed position. A schematic sectional view for explaining a transparent sheet member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... MFP as image forming apparatus, 12 ... Printer unit as recording means, 14 ... Scanner unit as image reading apparatus, 15 ... Conveying unit as conveying apparatus, 28 ... Transparent sheet member, 45 ... As transparent plate Glass flat plate, 51... Light source section, 54... Light receiving section, P.

Claims (5)

By irradiating light from the other surface side of the transparent plate to the image reading position set on one surface side of the transparent plate, and receiving light reflected through the transparent plate and reflected on the document at the image reading position. A transport device that transports a document to the image reading position of an image reading device that reads an image of the document;
Near the image reading position, the image reading position is arranged to face one side of the transparent plate so as to guide the surface of the document facing the transparent plate, and at least the image reading position of the surface facing the transparent plate. And a transparent sheet member that has been subjected to a surface treatment for suppressing surface reflection on the corresponding part ,
A pressing member that guides the back surface of the document facing the transparent plate;
A spring that presses the pressing member toward the transparent plate with the transparent sheet member interposed therebetween;
A conveying apparatus comprising: 2. The hard coat process is performed on the surface of the transparent sheet member on the pressing member side in order to prevent the surface from being scratched when the document is guided. Conveying device. The surface treatment, conveying apparatus according to claim 1 or claim 2, characterized in that a thin film formation process for forming an antireflection film on the surface. The transport apparatus according to claim 1, wherein a transmittance of the transparent sheet member subjected to the surface treatment is equal to or greater than a transmittance of the transparent plate. The transport apparatus according to any one of claims 1 to 4,
A transparent plate,
A light source unit that irradiates light from the other side of the transparent plate to an image reading position set on one side of the transparent plate;
A light receiving unit that receives light that is irradiated from the light source unit, passes through the transparent plate and is reflected by the document at the image reading position, and converts the light into an electrical signal, and reads an image of the document. An image reading apparatus.

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