Reading device and recording device

Abstract

To provide a reading device that adopts a document transport reading method for reading a surface to be read while transporting a document and restrains dirt, dust, etc. from entering the inside of the device.SOLUTION: A reading device includes a platen glass 202, a transport roller that transports a document such that a reading target surface of the document faces a first surface of the platen glass, reading means that is arranged to face a second surface of the platen glass and reads the reading target surface through the platen glass, a frame (consisting of a glass frame 204, a base frame, etc.) that supports the platen glass, and a transport guide 203 that is detachably attached to the frame so as to face the first surface and guides the document transported by the transport roller. An attachment portion for attaching the transport guide to the frame, that is, engaging shapes 203F, 203R and engaged portions 204F, 204R overlap with the platen glass as viewed in an up-down direction vertical to a top surface as the first surface.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a reading device for reading a surface of a document, and more particularly to a reading device employing a document conveying and reading method for reading a surface of a document while conveying the document. [Background technology]

[0002] Conventionally, copying machines and multifunction machines equipped with a reading device for reading images recorded on an original are known. This type of reading device is a so-called flatbed scanner, and includes a platen glass on which an original can be placed, and an image sensor unit arranged as a reading means so as to be capable of reciprocating motion directly below the platen glass and parallel to the platen glass surface. Here, the image sensor unit refers to an image sensor having a substantially rectangular parallelepiped housing, such as a contact image sensor (CIS), mounted on a holding member.

[0003] Some reading devices are also equipped with an automatic document feeder (ADF: Auto Document Feeder). The ADF passes the document through a reading section for reading moving documents, and an image sensor unit stationary at the moving document reading position of the reading section reads the image of the document's surface to be read. Patent Document 1 discloses a configuration of a reading device equipped with an automatic document feeder. The reading device disclosed in Patent Document 1 is configured such that a transport guide that guides the transported document during reading using the automatic document feeder is detachably attached to the main body of the reading device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-114433 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the configuration of Patent Document 1, a holding member that adheres and holds a transparent film that guides a document transported above a platen glass (document table glass) with double-sided tape is detachably attached by a snap fit to a hole in an exterior frame that covers the top surface of the transported document reading unit. The snap fit in the configuration of Patent Document 1 is configured to wrap around and engage with the rear side of the exterior frame through a hole in the exterior frame, so that dirt and dust may enter the reading area inside the exterior frame through the hole and adhere to the image sensor, which may affect the image quality of the read image.

[0006] An object of the present invention is to provide a technique capable of preventing dirt, dust, and the like from entering the inside of a reading device. [Means for solving the problem]

[0007] In order to achieve the above object, the reading device of the present invention comprises: The manuscript glass and a conveying roller that conveys the document so that a surface to be read of the document faces a first surface of the document platen glass; a reading means arranged to face a second surface of the platen glass and reading the surface to be read through the platen glass; a support member for supporting the document glass; The conveying roller is detachably attached to the support member so as to face the first surface. a guide for guiding a document conveyed by the Equipped with The present invention is characterized in that at least a part of an attachment portion for attaching the guide to the support member overlaps with the document table glass when viewed in a top-bottom direction perpendicular to the first surface. Effect of the Invention

[0008] According to the present invention, it is possible to prevent dirt, dust, and the like from entering the inside of a reading device. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an image reading apparatus according to an embodiment of the present invention; [Diagram 2] 1 is a cross-sectional view of an image reading device when the automatic document feeder according to the embodiment is closed; [Diagram 3] 1A and 1B are a top view and a cross-sectional view of a scanner unit according to the present embodiment; [Figure 4] 1 is a perspective view and an exploded view of a reading unit according to an embodiment of the present invention; [Diagram 5] FIG. 1 is a top view showing an internal configuration of an image reading device according to an embodiment of the present invention; [Figure 6] 1 is an exploded view of a glass frame unit according to an embodiment of the present invention; [Figure 7] FIG. 13 is a configuration explanatory diagram of a mounting portion of a transport guide according to the present embodiment; [Figure 8] FIG. 1 is a top view of a state in which a conveying guide according to the present embodiment is attached to a glass frame; [Figure 9] 1 is a cross-sectional view of a conveying guide portion in a state in which the conveying guide according to the embodiment is attached to a glass frame; [Figure 10] FIG. 13 is a detailed view of a transport guide attachment portion according to the embodiment; [Figure 11] 1 is a cross-sectional view of an image sensor according to an embodiment of the present invention; [Figure 12] 1A and 1B are a top view and an exploded view of a removable transport guide according to the present embodiment; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the mode for carrying out the present invention will be described in detail by way of example with reference to the drawings. Note that the dimensions, materials, shapes, and relative positions of the components described in the embodiments may be changed as appropriate depending on the configuration and various conditions of the device to which the invention is applied. In other words, the scope of the present invention is not limited to the following embodiments.

[0011] First Embodiment Specific examples of image reading devices equipped with the ADF according to the embodiment of the present invention include a flatbed scanner device, or a copying machine, a facsimile, a multifunction machine, etc., which are a combination of a flatbed scanner device and a printing device. The printing device can print (record) an image scanned (read) by the flatbed scanner device using a recording means. In the following, in this embodiment, an image reading device that imports an original image into a computer or the like will be described as an example of an image reading device to which the present invention can be applied. Note that the same reference numerals throughout the drawings referred to in the following description indicate the same or corresponding parts. X, Y, and Z shown in each drawing indicate directions that are mutually orthogonal. X is the width direction of the multifunction device 1, Y is the depth direction, and Z is the height direction. The arrangement of the image reading device in each drawing is based on the assumption that the device is installed on a horizontal installation surface with respect to the vertical direction as a normal use state of the device.

[0012] FIG. 1 is an external perspective view of a multifunction device 1 in which an image reading device main body 100 according to this embodiment is combined with a printing device (image recording device) 400, which is, for example, an inkjet printer (liquid ejection type image forming device). The image reading device main body 100 of this embodiment is broadly composed of an image reading section 200 (hereinafter referred to as a scanner section) and an ADF section 300. FIG. 1 shows a state in which the ADF section 300 is opened so that a document can be placed on the scanner section 200. The printing device 400 is not limited to the above-mentioned inkjet printer, and may be, for example, a laser printer. The image forming apparatus may be an electrophotographic image forming apparatus.

[0013] The configuration of the ADF unit 300 of the image reading device main body 100 will be described with reference to Fig. 2. Fig. 2 is a cross-sectional view of the scanner unit 200 and ADF unit 300, which are the image reading device main body 100, in the XZ plane when the ADF unit 300 is closed. The ADF unit 300 in Fig. 2 shows the configuration of a document transport path 311 (indicated by a thick solid arrow), and part of the document transport path 311 is formed by using part of the scanner unit 200.

[0014] The ADF unit 300 is an opening / closing unit configured to be rotatable between a closed position where it covers the top surface of the platen glass 202 of the scanner unit 200 and an open position where it opens the top surface. The ADF unit 300 is rotatably attached to a frame (support member) of the scanner unit 200 so that the axis of rotation extends along the device width direction (X direction) on the rear side (second side) in the depth direction (Y direction) with respect to an opening 2041 (see FIG. 3) of the glass frame 204. The frame of the scanner unit 200 is composed of the glass frame 204, a base frame 223, etc.

[0015] The ADF unit 300 includes an original placement platform 301 on which an original is placed, an original transport mechanism, and an original discharge unit 303. The configuration of the original transport mechanism will be described below, starting from the upstream side of the original transport. Here, the original transport mechanism refers to the entire paper transport mechanism from pickup roller 304 to discharge roller 309, which will be described below.

[0016] An automatically transported original 310 placed on an original placement table 301 is transported by a pickup roller 304 of an original transport mechanism to a separation roller 305, and then transported one sheet at a time by separation roller 305 and separation pad 306 to downstream transport roller 307. Next, the original 310 is transported by transport roller 307 to a detachable transport guide 203 on the downstream side, and when passing through the transport guide 203, it is read by an image sensor 206 in a reading unit 207 located at a predetermined original reading position (hereinafter, ADF position). At the original reading position, the original 310 is pressed by a white pressure plate 308 so as to be in close contact with the transport guide 203. The white pressure plate 308 has a size that covers the entire area of ​​the image sensor 206 in the longitudinal direction (depth direction in FIG. 2).

[0017] The original 310 that has passed through the transport guide 203 passes through an original size indicator member 205 on the downstream side of the transport guide 203, and is discharged to an original discharge section 303 by a downstream discharge roller 309. The transport guide 203 and the original size indicator member 205 described above are components of the scanner section 200. Here, various original detection sensors (not shown) are arranged in the original transport mechanism section, and detect the passage of the leading and trailing ends of the original 310, and the output thereof is used to control the timing of reading by the image sensor 206.

[0018] There are two methods for reading the original 310 by the image reading device main body 100 of this embodiment: a fixed original reading method (flatbed reading) and an original conveying reading method (ADF reading). The fixed original reading method is a method in which the original 310 is fixed and stationary on the original platen glass 202, and the reading unit 207 is moved in the sub-scanning direction (X direction) to read the surface of the original 310 to be read. The original conveying reading method is a method in which the reading unit 207 is fixed and stationary at the ADF position below the conveying guide 203, and the original 310 is conveyed by the ADF section 300 while being read.

[0019] The reading unit 207 in the scanner section 200 in FIG. 2 is shown in a standby state at the ADF position to read the document 310 that is automatically conveyed by the ADF section 300 described above.

[0020] The configuration of the scanner unit 200 of the image reading device main body 100 will be described with reference to FIGS. 3 to 5. do.

[0021] Fig. 3(a) is a top view of the scanner unit 200 when the ADF unit is removed from the image reading device main body, and shows the entire glass frame unit 201. Fig. 3(b) is a cross section taken along line AA in Fig. 3(a), Fig. 3(c) is a cross section taken along line BB in Fig. 3(a), and Fig. 3(c) shows ... the main scanning direction (Y direction) of the reading unit 207. Fig. 3(d) is an enlarged view of part C around the document size indicator member 205 of the glass frame unit 201 in Fig. 3(b).

[0022] The glass frame unit 201 is composed of a platen glass 202 on which a document 310 is placed, and a glass frame 204 that holds a transport guide 203 that guides the automatically transported document 310 when it passes through the ADF position. The transport guide 203 is configured to be detachable from the glass frame 204 as a frame body.

[0023] The platen glass 202 has an upper surface as a first surface on which the original 310 is placed, a reading area 2021 facing a non-reading surface of the original 310, and a non-reading area 2022 (see FIG. 6 and the like) surrounding the reading area 2021. A lower surface (rear surface) as a second surface of the platen glass 202 faces the reading unit 207.

[0024] The glass frame 204 has an opening 2041 that exposes a reading area 2021 that faces the surface to be read of the original 310 on the upper surface of the original table glass 202. An opening edge 2042 that surrounds the opening 2041 in the glass frame 204 overlaps a non-reading area 2022 (see FIG. 6, etc.) outside the reading area 2021 on the upper surface of the original table glass 202 when viewed in the up-down direction (Z direction) perpendicular to the upper surface of the original table glass 202.

[0025] The glass frame 204 is provided with the above-mentioned document size indicator member 205 and a document abutment reference 226 between the document table glass 202 and the transport guide 203. On the document placement surface side of the document table glass 202, a white sheet 224 is arranged. The white sheet 224 includes a white area 224W for performing shading correction and a black area 224B that serves as the sub-scanning direction reference position of the image sensor 206.

[0026] 4 is a perspective view and an exploded view of the reading unit 207 that reads an original image. The reading unit 207 is composed of an image sensor 206, a sensor holder 217, a slider 218, and a drive transmission unit 219 that transmits a drive force to the reading unit 207. At both ends of the image sensor 206 in the main scanning direction (Y direction), a roller unit 211 and a roller unit 212 that ensure the focal distance with respect to the original to be read are arranged. At both ends of each of the roller units 211 and 212 in the sub-scanning direction, roller pairs 213 and 214 and roller pairs 215 and 216 are rotatably arranged. In addition, a pressing spring 232 is arranged between the image sensor 206 and the sensor holder 217, and constantly presses the image sensor 206 against the rear surface of the original table glass 202. Therefore, the roller pairs 213 and 214 and the roller pairs 215 and 216 are configured to roll on the rear surface of the platen glass 202 when the reading unit 207 moves in the sub-scanning direction (X direction).

[0027] 5 is a diagram showing the overall internal configuration of the scanner unit 200 with the glass frame unit 201 removed from the top view shown in FIG. 3(a). In other words, FIG. 5 shows the arrangement and configuration of the reading unit 207 and the base frame 223.

[0028] A guide rail 221, whose longitudinal direction is the sub-scanning direction, is disposed in the approximate center of the base frame 223 in the Y direction. The slider 218 of the reading unit 207 described above is disposed on the guide rail 221 so as to be slidable in the sub-scanning direction (X direction). When a driving input is applied to the motor 220 of the reading unit 207, the belt 222 moves in response to the input. The reading unit 207 can perform reciprocating scanning along the guide rail 221 through a drive transmission section to which the belt 222 is connected.

[0029] This embodiment is a belt-driven type in which the drive unit is arranged on the base frame 223 and the drive force is transmitted by a belt, but it can also be used in a self-propelled type reading unit in which the drive unit is arranged in the reading unit 207.

[0030] Next, the configuration of the transport guide 203 and the attachment / detachment portion (attachment portion) for attaching the transport guide 203 will be described.

[0031] 6 is an exploded view of the original platen glass 202, transport guide 203, glass frame 204, and original size indicator member 205. The original size indicator member 205 is attached to the original platen glass 202, and the integrated original platen glass 202 and original size indicator member 205 are attached to the glass frame 204. After that, the transport guide 203 is attached to the glass frame 204. The transport guide 203 has convex engaging shapes (engaging portions) 203F, 203R for engaging the transport guide 203 with the glass frame 204, and the glass frame 204 has engaged portions 204F, 204R with which the engaging shapes 203F, 203R engage.

[0032] An engaging shape 203F of the transport guide 203 engages with an engaged portion 204F of the glass frame 204 on the front side or front surface side (first side) in the depth direction (Y direction) intersecting with the transport path of the original 310. Also, an engaging shape 203R of the transport guide 203 engages with an engaged portion 204R of the glass frame 204 on the back side or rear side (second side) in the opposite depth direction (Y direction). The transport guide 203 is attached to the glass frame 204 by the first attachment portion (engaging shape 203F, engaged portion 204F) on the front side and the second attachment portion (engaging shape 203R, engaged portion 204R) on the back side.

[0033] FIG. 7 is a diagram showing a detailed configuration of the attachment portion of the transport guide 203 and the glass frame 204. FIG. 7(a) is a top view of the transport guide 203 attached to the glass frame 204. FIG. 7(b) is an enlarged view of the vicinity of the engaged portion 204R in FIG. 7(a). FIG. 7(c) is an enlarged view of the vicinity of the engaged portion 204F in FIG. 7(a). FIG. 7(d) is a GG cross-sectional view of FIG. 7(c). FIG. 7(e) is a GG cross-sectional view of FIG. 7(c) in which the transport guide 203 is removed (disengaged). FIG. 7(f) is an HH cross-sectional view of FIG. 7(b). FIG. 7(g) is an HH cross-sectional view of FIG. 7(b) in which the transport guide 203 is removed (disengaged).

[0034] With reference to Figures 7(a), 7(c), 7(d), and 7(e), the first mounting portion on the front side, i.e., the engaging shape 203F as the first engaging portion and the engaged portion 204F as the first engaged portion, will be described.

[0035] The engaging shape 203F is a protrusion that protrudes from the back side in the depth direction (Y direction) toward the front side (-Y direction) along the surface direction along the upper surface of the document glass 202. The engaged portion 204F has an elastic engaging shape 204Fa as a first claw portion and a non-elastic engaging shape 204Fb as a second claw portion. The elastic engaging shape 204Fa and the non-elastic engaging shape 204Fb face each other in the surface direction along the upper surface of the document glass 202. Between the elastic engaging shape 204Fa and the non-elastic engaging shape 204Fb, a gap portion 204Fc that is a space with which the engaging shape 203F engages is formed. The gap portion 204Fc is a gap that opens toward the upper side (+Z direction) in the vertical direction (Z direction). The elastic engaging shape 204Fa is composed of a support portion 204Fa1 and an elastic movable piece 204Fa2. The support portion 204Fa1 is erected in a direction away from the upper surface of the document table glass 202, and supports the elastic movable piece 204Fa2. The elastic movable piece 204Fa2 is fitted to the non-elastic engagement shape 204Fb from the tip of the support portion 204Fa1. The support portion 204Fa1 is elastically displaceable in the direction facing the inelastic engagement shape 204Fb with the tip of the support portion 204Fa1 as a base point.

[0036] When the engaging shape 203F of the conveying guide 203 is engaged with the engaged portion 204F of the glass frame 204, the engaging shape 203F is inserted into the gap 204Fc from above downward (in the -Z direction) in the vertical direction (Z direction). At this time, the elastic engaging shape 204Fa is pressed against the engaging shape 203F and elastically deforms in the direction in which the space of the gap 204Fc expands, so that the engaging shape 203F can be accommodated in the gap 204Fc.

[0037] When the engaging shape 203F is inserted, the elastic engaging shape 204Fa is deformed in a direction in which the elastic movable piece 204Fa2 widens the gap portion 204Fc (a direction approaching the support portion 204Fa1) (arrow in FIG. 7(d)).

[0038] In this embodiment, one of the first claw portion (elastic engagement shape 204Fa) and the second claw portion (non-elastic engagement shape 204Fb) that constitute the engaged portion 204F is configured to be elastically deformable, but the other may be elastically deformable, or both may be elastically deformable.

[0039] The second mounting portion on the rear side, that is, the engaging shape 203R as the second engaging portion and the engaged portion 204R as the second engaged portion will be described with reference to FIGS. 7(b), 7(f) and 7(g).

[0040] The engaging shape 203R is a protrusion that protrudes from the front side toward the back side in the depth direction (Y direction) (+Y direction) along the surface direction along the upper surface of the document table glass 202. The engaged portion 204R is formed of a hole portion (a recess recessed toward the back side in the depth direction (outward)) 204Ra having a space in the depth direction (Y direction) of the image reading device main body 100.

[0041] When the engaging shape 203R of the conveying guide 203 is engaged with the engaged portion 204R of the glass frame 204, the engaging shape 203R is inserted from the front side to the back side (+Y direction) in the depth direction (Y direction) toward the hole 204Ra, thereby engaging the engaging shape 203R. In other words, the engaging shape 203R is engaged with the engaged portion 204R.

[0042] Here, in this embodiment, in order to ensure that the operating force applied by the user to attach and detach the conveying guide 203 is stable even if there is dimensional variation in the parts, the engaged portion 204F on the front side of the glass frame 204 has a snap-fit ​​configuration as described above.

[0043] In this embodiment, the transport guide 203 is attached to the glass frame 204 by first inserting the engaging shape 203R of the transport guide 203 into the engaged portion 204R of the glass frame 204 in the +Y direction. Then, the engaging shape 203F of the transport guide 203 is assembled to the engaged portion 204F of the glass frame 204 in the -Z direction.

[0044] The conveying guide 203 is attached to the glass frame 204 with the ADF unit 300 in the open position. The working space is wide on the front side in the depth direction (Y direction) but narrow on the back side, and there is no room around the second mounting portion (engagement shape 203R, engaged portion 204R) on the back side. Therefore, by configuring the second mounting portion (engagement shape 203R, engaged portion 204R) on the back side so that the installation can be completed with a simple installation work of just inserting it into the back side in the depth direction, it is possible to improve the workability of the installation work of the conveying guide 203.

[0045] In addition, if there is no problem in securing the working space, the configuration of the second mounting part at the back side can be It may have the same configuration as the first attachment portion (engaging shape 203F, engaged portion 204F) on the front side.

[0046] Fig. 8 is a diagram showing a state in which transport guide 203 is attached to glass frame 204, and Fig. 9 is a cross-sectional view taken along CC in Fig. 8. Transport guide 203 is formed to a size that fits within the Z projection plane (contour line 202a) of platen glass 202. Fig. 10 is a detailed view of the attachment portions (parts D and E) of transport guide 203 and glass frame 204 in Fig. 9.

[0047] The engaging shapes 203F, 203R of the transport guide 203 and the engaged portions 204F, 204R of the glass frame 204 that engage with them are also formed inside the Z projection plane (contour line 202a) of the platen glass 202. In addition, the engaged portions 204F, 204R of the glass frame 204 and the platen glass 202 are configured so that there is no gap in the Z direction.

[0048] One of the causes of poorly read images is the adhesion of dirt, dust, and the like to the image sensor 206. If dirt, dust, and the like enters the reading unit arrangement area R_A (see FIG. 9 ), which is the space in which the reading unit 207 is arranged in the base frame 223, there is a concern that the dirt, dust, and the like will adhere to the image sensor 206 in the reading unit 207.

[0049] 11 is a cross-sectional view of the image sensor 206. The image sensor 206 incorporates three color light emitting elements 102 (LEDs), a rod lens array 209, and a light receiving element 101. Light irradiated from the LEDs 102 to an original passes through the original table glass 202 and is reflected by the original surface (surface to be read), and the reflected light passes through the rod lens array 209 to form an image on the light receiving element 101. If dirt or dust that has entered the reading unit arrangement area R_A adheres to the lens surface of the rod lens array 209, the dirt or dust will be reflected in the formed image, causing an image defect in which black spots appear in the read image.

[0050] In this embodiment, the engaged portions 204F, 204R are located on the platen glass 202, and the peripheries of the engaged portions 204F, 204R are configured so that there is no gap between the platen glass 202 and the engaged portions, so that it is possible to prevent dirt, dust, etc. from entering the base frame 223 from the engaged portions 204F, 204R. By fitting the conveyance guide 203, including its mounting portion, within the projected area of ​​the platen glass 202, dirt, dust, etc. remain on the platen glass 202, and it is possible to prevent dirt, dust, etc. from entering the reading area where the reading unit 207 is disposed. Therefore, it is possible to maintain a good read image.

[0051] Moreover, by forming the engaged portions 204F and 204R of the glass frame 204 within the Z projection plane (contour line 202a) of the platen glass 202, the transport guide 203 can be made compact. Accordingly, the glass frame 204 and further the image reading device main body 100 can also be made compact.

[0052] In addition, by forming all of the engaged portions 204F, 204R on the upper portion of the platen glass 202, there is an advantage that the user can attach and detach the transport guide 203 while looking at the engaged portions 204F, 204R.

[0053] In the configuration of this embodiment, the platen glass 202 functions as a shielding portion that prevents dirt, dust, and the like from easily reaching the rear side of the platen glass 202, i.e., the image sensor 206. That is, it can be said that the platen glass 202 forms a labyrinth structure (the platen glass 202 functions as a labyrinth seal). Therefore, for example, even if the gap between the engaged portions 204F, 204R and the platen glass 202 is not completely blocked, as long as the effect of the labyrinth structure of the platen glass 202 can prevent dirt, dust, and the like from reaching the image sensor 206, a configuration with a gap may be used.

[0054] It is most preferable that the mounting portion is configured to overlap the platen glass 202 so that the entire mounting portion is included in the platen glass 202 when viewed in the up-down direction (-Z direction). However, as long as it is possible to prevent dirt, dust, and the like from reaching the image sensor 206, the mounting portion and the transport guide 203 may be configured to overlap and slightly protrude from the platen glass 202.

[0055] Also, at least one of the mounting parts on both the left and right sides of the reading area of ​​the platen glass 202 may be configured to overlap the platen glass 202 when viewed in the up-down direction (-Z direction). For example, the mounting part on the back side close to the rotation axis of the ADF unit 300 is located in a recessed position relative to the mounting part on the front side, and is less susceptible to dirt and dust than the mounting part on the front side, so only the mounting part on the front side may be configured to overlap the platen glass 202 in the Z direction.

[0056] 12(a) and 12(b) are a top view and an exploded view of the transport guide 203. The transport guide 203 has a Mylar sheet holding member 203a, a black Mylar sheet 203b, and a transparent Mylar sheet 203c having optical transparency. The black Mylar sheet 203b is almost opaque to light, but has a cutout BC through which light passes. The transparent Mylar sheet 203c is a sheet member that transmits light. The Mylar sheet holding member 203a has pressing shapes 203d and 203e at both ends in the depth direction intersecting with the transport path of the document 310, which press the black Mylar sheet 203b and the transparent Mylar sheet 203c against floating. The Mylar sheet holding member 203a has engagement shapes 203F and 203R at both ends, which engage with the glass frame 204.

[0057] Here, the engagement shapes 203F and 203R are formed in positions approximately on a straight line in the X direction with the pressing shapes 203d and 203e, respectively, in order to reduce the size of the Mylar sheet holding member 203a. That is, the pressing shapes 203d and 203e as pressing parts and the engagement shapes 203F and 203R as engagement parts are arranged side by side in a direction along the transport path of the document 310. Furthermore, the pressing shapes 203d and 203e are provided downstream of the engagement shapes 203F and 203R in the direction along the transport path, and have a shape that extends toward the downstream side.

[0058] Black Mylar sheet 203b and transparent Mylar sheet 203c have their upstream ends in the direction along the transport path of original 310 held by double-sided tape on Mylar sheet holding member 203a and black Mylar sheet 203b, respectively. During ADF reading, with reading unit 207 positioned at the original reading position (ADF position), the original is read by image sensor 206 through original platen glass 202 and transparent Mylar sheet 203c. Here, since the reading operation by image sensor 206 is performed through transparent Mylar sheet 203c, black Mylar sheet 203b may be transparent.

[0059] Although the embodiment has been described above, the present invention is not limited to this, and the present invention can also be applied to sheet feeding devices other than image recording devices.

[0060] The disclosure of the embodiments of the present invention includes the following configurations. (Configuration 1) The manuscript glass and a conveying roller that conveys the document so that a surface to be read of the document faces a first surface of the document platen glass; a reading means arranged to face a second surface of the platen glass and reading the surface to be read through the platen glass; a support member for supporting the document glass; The conveying roller is detachably attached to the support member so as to face the first surface. a guide for guiding a document conveyed by the Equipped with The reading device is characterized in that at least a part of an attachment portion for attaching the guide to the support member overlaps with the document table glass when viewed in a vertical direction perpendicular to the first surface. (Configuration 2) 2. The reading device according to configuration 1, wherein the attachment portion overlaps the platen glass so as to be included therein when viewed in the up-down direction. (Configuration 3) The support member is an opening for exposing a reading area of ​​the first surface facing the surface to be read; an opening edge portion that overlaps a non-reading area outside the reading area on the first surface when viewed in the up-down direction; having The mounting portion is An engagement portion provided on the guide; an engaged portion provided on the opening edge portion of the support member and engaged with the engaging portion; Including, 3. The reading device according to configuration 1 or 2, wherein the engaging portion and the engaged portion are provided so as to face the non-reading area, respectively. (Configuration 4) The reading device according to configuration 3, wherein the engaged portion clamps the engaging portion in a planar direction along the first surface in an elastically deformed state. (Configuration 5) The engaged portion is A first claw portion, A second claw portion opposed to the first claw portion in the surface direction; having Between the first claw portion and the second claw portion, a gap that is open upward is formed into which the engagement portion can be inserted from above in the vertical direction, When the engaging portion is not inserted into the gap, a width of the gap in a direction in which the first claw portion and the second claw portion face each other is narrower than a width of the engaging portion in the direction in which the first claw portion and the second claw portion face each other, The reading device described in configuration 3 or 4, characterized in that the engagement portion is inserted into the gap by elastic deformation of at least one of the first claw portion and the second claw portion, and is clamped between the first claw portion and the second claw portion. (Configuration 6) The first claw portion is A support portion standing in a direction away from the first surface; an elastic movable piece that hangs down from a tip of the support portion to a side facing the second claw portion and is configured to be elastically displaceable in the facing direction with respect to the support portion, with the tip as a base point; having The reading device according to configuration 5, wherein the elastic movable piece holds the engaging portion between itself and the second claw portion. (Configuration 7) The engaging portion is a first engaging portion, and the engaged portion is a first engaged portion, The mounting portion is the first engaging portion and the first engaged portion are provided on a first side in a direction along the surface direction and intersecting a transport path along which the transport roller transports the document, On a second side opposite the first side in the intersecting direction, A second engagement portion provided on the guide; a second engaged portion provided on the opening edge portion of the support member and engaged with the second engaging portion; 7. The reading device according to claim 6, further comprising: (Configuration 8) The reading device according to configuration 7, wherein the second engaged portion holds the second engaging portion between itself and the non-reading area. (Configuration 9) The reading device described in configuration 7 or 8, wherein the second engaged portion is a recess that is recessed outward in the intersecting direction, and is configured so that the second engaging portion is inserted in the intersecting direction. (Configuration 10) an opening / closing unit configured to be rotatable between a closed position that covers the first surface of the document table glass and an open position that exposes the first surface; A reading device described in any one of configurations 1 to 9, characterized in that the opening / closing unit is rotatably attached to the support member so that a rotation axis extends along the conveying path on the second side of the opening. (Configuration 11) 11. The reading device according to configuration 10, wherein the transport roller is provided in the opening / closing section. (Configuration 12) A reading device described in any one of configurations 3 to 9, characterized in that an opening provided around at least the engaged portion in the support member is blocked by the document table glass when viewed in the up-down direction. (Configuration 13) the guide includes a transparent sheet member extending along a transport path along which the transport roller transports the document between the surface to be read and a reading area of ​​the first surface facing the surface to be read, 10. The reading device according to any one of configurations 3 to 9, wherein the reading means reads the surface to be read via the document platen glass and the sheet member. (Configuration 14) The guide is a holding portion that holds an upstream end of the sheet member in the conveying path; a pressing portion that presses both ends of the sheet member outside the conveying path in a direction intersecting the conveying path; having 14. The reading device according to configuration 13, wherein the engaging portion and the pressing portion are aligned in a direction along the transport path. (Configuration 15) 15. The reading device according to configuration 14, wherein the pressing portion is provided downstream of the engaging portion in a direction along the transport path and has a shape extending toward the downstream side. (Configuration 16) the mounting portions are provided in pairs on both sides of a reading area in which the read surface of the first surface faces each other in a direction intersecting a transport path along which the transport roller transports the document; 16. The reading device according to any one of configurations 1 to 15, wherein at least one of the pair of mounting portions is arranged to overlap the document table glass when viewed in the up-down direction. (Configuration 17) 17. A recording apparatus comprising the reading device according to any one of configurations 1 to 16, wherein an image read by the reading means is recorded by a recording means. [Explanation of symbols]

[0061] 200...scanner section (image reading section), 201...glass frame unit, 202...original glass table, 203...transport guide, 204...glass frame, 205...original size indicator member, 206...image sensor, 207...reading unit, 300...ADF section, 310...original, 311...original transport path, 400...printing device

Claims

1. The manuscript glass and a conveying roller that conveys the document so that a surface to be read of the document faces a first surface of the document table glass; a reading unit arranged to face a second surface of the platen glass and reading the surface to be read through the platen glass; a support member for supporting the document glass; a guide that is detachably attached to the support member so as to face the first surface and that guides the document transported by the transport roller; Equipped with a mounting portion for mounting the guide to the support member, the mounting portion being at least partially overlapping the platen glass when viewed in a vertical direction perpendicular to the first surface;

2. 2. The reading device according to claim 1, wherein the attachment portion overlaps the document table glass so as to be included therein when viewed in the up-down direction.

3. The support member is an opening for exposing a reading area of ​​the first surface facing the surface to be read; an opening edge portion that overlaps a non-reading area outside the reading area on the first surface when viewed in the up-down direction; having The mounting portion is An engagement portion provided on the guide; an engaged portion provided on the opening edge portion of the support member and engaged with the engaging portion; Including, 2. The reading device according to claim 1, wherein the engaging portion and the engaged portion are provided so as to face the non-reading area.

4. The reading device according to claim 3 , wherein the engaged portion sandwiches the engaging portion in a planar direction along the first surface in a state where the engaged portion is elastically deformed.

5. The engaged portion is A first claw portion; A second claw portion opposed to the first claw portion in the surface direction; having Between the first claw portion and the second claw portion, a gap that is open upward is formed into which the engagement portion can be inserted from above in the vertical direction, When the engaging portion is not inserted into the gap, a width of the gap in a direction in which the first claw portion and the second claw portion face each other is narrower than a width of the engaging portion in the direction in which the first claw portion and the second claw portion face each other, The reading device according to claim 4, characterized in that the engagement portion is inserted into the gap by elastic deformation of at least one of the first claw portion and the second claw portion, and is clamped between the first claw portion and the second claw portion.

6. The first claw portion is A support portion provided in an upright position in a direction away from the first surface; an elastic movable piece that hangs down from a tip of the support portion toward a side facing the second claw portion and is configured to be elastically displaceable in the facing direction with respect to the support portion, with the tip as a base point; having 6. The reading device according to claim 5, wherein the elastic movable piece holds the engaging portion between itself and the second claw portion.

7. The engaging portion is a first engaging portion, and the engaged portion is a first engaged portion, The mounting portion is the first engaging portion and the first engaged portion are disposed on a first side in a direction along the surface direction and intersecting a transport path along which the transport roller transports the document, On a second side opposite the first side in the intersecting direction, A second engagement portion provided on the guide; a second engaged portion provided on the opening edge portion of the support member and engaged with the second engaging portion; 7. The reading device according to claim 6, further comprising:

8. The reading device according to claim 7 , wherein the second engaged portion sandwiches the second engaging portion between the second engaged portion and the non-reading area.

9. 9. The reading device according to claim 8, wherein the second engaged portion is a recess recessed outward in the intersecting direction, and the second engaging portion is configured to be inserted in the intersecting direction.

10. an opening / closing unit configured to be rotatable between a closed position that covers the first surface of the document table glass and an open position that exposes the first surface; 10. The reading device according to claim 9, wherein the opening / closing unit is rotatably attached to the support member such that a rotation axis of the opening / closing unit extends along the transport path on the second side of the opening.

11. 11. The reading device according to claim 10, wherein the transport roller is provided in the opening / closing section.

12. 4. The reading device according to claim 3, wherein an opening provided in at least the periphery of the engaged portion in the support member is covered by the document table glass when viewed in the up-down direction.

13. the guide includes a transparent sheet member extending along a transport path along which the transport roller transports the document between the read surface and a reading area of ​​the first surface facing the read surface, 4. The reading device according to claim 3, wherein the reading means reads the surface to be read through the document platen glass and the sheet member.

14. The guide is a holding portion that holds an upstream end of the sheet member in the conveying path; a pressing portion that presses both ends of the sheet member outside the conveying path in a direction intersecting the conveying path; having The reading device according to claim 13 , wherein the engaging portion and the pressing portion are aligned in a direction along the transport path.

15. 15. The reading device according to claim 14, wherein the pressing portion is provided downstream of the engaging portion in a direction along the transport path and has a shape extending toward the downstream side.

16. the mounting portions are provided in pairs on both sides of a reading area in which the read surface of the first surface faces each other in a direction intersecting a transport path along which the transport roller transports the document; 2. The reading device according to claim 1, wherein at least one of the pair of mounting portions is provided so as to overlap the document table glass when viewed in the up-down direction.

17. 2. A recording apparatus comprising the reading device according to claim 1, wherein the image read by the reading means is recorded by a recording means.

Images