JP2020005099A - Image reading device and image formation device - Google Patents

Abstract

To improve operationality of a pressing member with simple configuration.SOLUTION: A pressing member (211) for pressing a sheet placed on the placement table of an image reading device is supported rotatably by a sheet transport part. A pressing member is provided with an operation tool (220) capable of disengaging the pressing member and the sheet transport part. The operation tool has a first face (220a) capable of pressing in a first direction (D1) away from the sheet transport part in the rotary direction of the pressing member, and a second face (220b) capable of pressing in a second direction (D2) opposite to the first direction. Upon receiving a force in the first direction on the first face, the operation tool disengages the pressing member and the sheet transport part. In a state where the pressing member is open, rotation of the pressing member in the first direction is regulated when the operation tool receives a force in the second direction.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an image reading apparatus that reads image information from a sheet and an image forming apparatus including the same.

  2. Description of the Related Art Conventionally, as an image reading device, a configuration is known in which image information can be read from both a sheet (static document) placed on a mounting table and a sheet (moving document) conveyed by a document conveying device. I have. Such an image reading apparatus has a sheet conveying device that can be opened and closed with respect to the reading device main body, and a pressing member for pressing a stationary document to a mounting table is provided below the sheet conveying device.

  Patent Document 1 describes a configuration in which a document transport unit and a document pressing plate can be separated. According to this configuration, when the original transport unit is opened from the reading unit (the main body of the reading device), only the original pressing plate is rotated toward the reading unit to press the original to the original plate, thereby reading the stationary original. Is performed.

JP 2000-168988 A

  In the configuration described in the above document, the document holding plate is separated from the document feeding unit by releasing the engagement between the engaging element provided on the document pressing plate and the engaging hole provided on the document feeding unit. Becomes possible. At this time, if the document pressing plate drops due to its own weight, the device may be damaged by vigorously colliding with the document table, so that the user has to operate with care. On the other hand, providing an additional configuration such as a friction hinge to suppress the lowering speed of the document pressing plate leads to an increase in cost.

  Therefore, an object of the present invention is to provide an image reading apparatus having a simple configuration and high operability, and an image forming apparatus having the same.

  One embodiment of the present invention is a main body having a mounting table on which a sheet is mounted, and a sheet conveying unit that conveys the sheet, the sheet being supported by the main body and capable of opening upward with respect to the main body. A transport unit, a reading unit disposed on the main body, reading image information from a sheet placed on the mounting table or a sheet transported by the sheet transport unit, and rotatably supported by the sheet transport unit, A pressing member that presses a sheet placed on the mounting table, and an operating tool provided on the pressing member and capable of releasing engagement between the pressing member and the sheet conveying unit, the operating tool includes: A first surface that can be pressed in a first direction away from the sheet conveyance unit in a rotation direction of the pressing member with respect to the sheet conveyance unit; and a second surface that can be pressed in a second direction opposite to the first direction. With the face When receiving the force in the first direction on the first surface, the engagement between the pressing member and the sheet conveying unit is released, and in a state where the pressing member is opened, the second surface is pressed on the second surface. The image reading apparatus according to claim 1, wherein rotation of the pressing member in the first direction can be restricted by receiving forces in two directions.

  According to the present invention, it is possible to provide an image reading apparatus having a simple configuration and high operability, and an image forming apparatus including the same.

FIG. 2 is a perspective view of the image reading apparatus according to the first embodiment. FIG. 1 is a schematic diagram of an image forming apparatus according to a first embodiment. FIG. 2 is a perspective view of the image reading apparatus according to the first embodiment. FIG. 2 is a schematic diagram of the image reading apparatus according to the first embodiment. FIG. 2 is a diagram of the ADF of the image reading apparatus according to the first embodiment as viewed from below. The figure which expanded a part of FIG. FIG. 4 is a cross-sectional view illustrating a configuration of an operation tool of the document pressing plate according to the first embodiment. FIG. 3 is a perspective view illustrating an operation tool and a release mechanism of the document pressing plate according to the first embodiment. FIG. 2 is a perspective view illustrating a document pressing plate according to the first embodiment. FIG. 3 is a side view of the document pressing plate according to the first embodiment. FIG. 13 is a cross-sectional view illustrating a configuration of an operation tool for a document pressing plate according to a modification. FIG. 10 is a side view showing the configuration of an operation tool for a document pressing plate according to another modification. FIG. 9 is a perspective view showing a document pressing plate according to a second embodiment.

  Hereinafter, embodiments for implementing the present invention will be described with reference to the drawings.

[Image forming apparatus]
As shown in FIGS. 1 and 2, the image reading apparatus 1 according to the first embodiment forms a part of the image forming apparatus 10 and is arranged above the image forming apparatus main body 300. Hereinafter, the overall configuration of the image forming apparatus 10 will be described, and then the image reading apparatus 1 will be described.

  The image forming apparatus 10 is a full-color MFP, and the image forming apparatus main body 300 includes an electrophotographic unit 301 including four image forming units 11Y, 11M, 11C, and 11K each having a photosensitive drum 12. The image forming apparatus main body 300 forms an image on a recording material based on image information input from the image reading apparatus 1 or a host device connected to the image forming apparatus via a network. Examples of the recording material (and a medium used as a document in the image reading device 1) include sheet materials such as paper, plastic film, and cloth.

  The four image forming units 11Y, 11M, 11C, and 11K included in the image forming apparatus main body 300 form yellow, magenta, cyan, and black toner images, respectively. Each of the image forming units 11Y to 11K has substantially the same configuration except that the development colors are different. Hereinafter, the image forming unit 11Y will be described as a representative.

  In the image forming section 11Y, a cylindrical photosensitive member, that is, a photosensitive drum 12 is provided as an image carrier. The photosensitive drum 12 is driven to rotate clockwise in FIG. A charging roller 13, a developing device 15, a primary transfer roller 16, and a cleaning device 18 are arranged around the photosensitive drum 12, and a laser scanner 14 is arranged below the image forming units 11Y to 11K. Further, a toner container 26 for supplying toner to the developing device 15 of each of the image forming units 11Y to 11K is mounted on an upper portion of the image forming apparatus main body 300.

  An intermediate transfer belt 17 as an intermediate transfer member is disposed above each image forming unit in FIG. The intermediate transfer belt 17 is an endless belt, stretched over a plurality of rollers, and rotates counterclockwise in the drawing. A primary transfer roller 16 facing the photosensitive drum 12 of each of the image forming units 11Y to 11K is disposed on the inner peripheral side of the intermediate transfer belt 17, and forms a primary transfer unit T1. Outer secondary transfer rollers 22 constituting the secondary transfer portion T2 are arranged at positions facing the inner secondary transfer roller 21 across the intermediate transfer belt 17 among the rollers that stretch the intermediate transfer belt 17. . Further, a fixing device 24 is arranged downstream of the secondary transfer portion T2 in the recording material conveyance direction. The fixing device 24 includes a fixing roller 24a, a corresponding pressure roller 24b, and a heat source such as a halogen lamp.

  Hereinafter, an image forming operation performed by the image forming apparatus main body 300 will be described. The recording material S is accommodated in a cassette 19 arranged below the image forming apparatus main body 300, and is fed one by one toward a registration roller 20 by a feeding roller 19a. Then, the leading end of the recording material S abuts on the registration roller 20 in the stopped state, and a skew of the recording material S is corrected by forming a loop. Thereafter, the registration roller 20 conveys the recording material S to the secondary transfer portion T2 at a timing synchronized with the toner image forming process by the electrophotographic unit 301.

  In each of the image forming units 11Y to 11K, a toner image of each color is formed by an electrophotographic process. That is, the surface of the photosensitive drum 12 is uniformly charged by the charging roller 13, and is exposed to the laser light emitted from the laser scanner 14, thereby forming an electrostatic latent image on the drum surface. This electrostatic latent image is developed by the toner supplied from the developing device 15, and becomes a toner image. The toner image formed on each photosensitive drum 12 is primarily transferred to the intermediate transfer belt 17 at a primary transfer section T1. Toner remaining on the surface of the photosensitive drum 12 after the primary transfer (transfer residual toner) is removed by the cleaning device 18.

  Such a process is performed in parallel in each of the image forming units 11Y to 11K, and the four color toner images are superimposed and primary-transferred on the intermediate transfer belt 17 to form a full-color toner image. The toner image carried on the intermediate transfer belt 17 is secondarily transferred to the recording material S in the secondary transfer section T2. The toner remaining on the intermediate transfer belt 17 without being transferred at the secondary transfer portion T2 is removed by the belt cleaner 23. Next, the recording material S is conveyed to the fixing device 24, and the toner image is heated and pressed. As a result, the toner is melted and mixed, and is fixed on the recording material S as a full-color image. Thereafter, the recording material S is discharged to the discharge tray 27 by the discharge roller 25.

  The above-described electrophotographic unit 301 is an example of an image forming unit that forms an image on the recording material S, and includes a method of directly transferring a toner image from a photoconductor to the recording material S, an image forming unit of an inkjet method, and the like. May be used.

[Image reading device]
An image reading apparatus 1 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 1, the image reading apparatus 1 includes a scanner main body 100 which is a main body of the image reading apparatus, and an automatic document feeder (hereinafter, referred to as an ADF) 200. The ADF 200 feeds the documents placed on the document tray 201 one by one, and discharges the document from which the image information has been read to the discharge tray 209.

  As shown in FIG. 2, a first reading unit 190 for reading image information is arranged inside the scanner main body 100. The first reading unit 190 includes a light source such as an LED lamp, a photoelectric conversion element that converts reflected light from the document into an electronic signal, and irradiates light from the light source to the document, and reflects light reflected from the document to the photoelectric conversion element. A guiding optical system. The first reading unit 190 is mounted on a movable carriage, and is movable in the horizontal direction in the figure. Further, a platen glass 120 is provided on an upper portion of the scanner main body 100. The first reading unit 190 is a reading unit of the present embodiment, and the platen glass 120 is a mounting table of the present embodiment.

  The ADF 200, which is a sheet conveying unit of the present embodiment, includes a second reading unit 290 as another reading unit, and a plurality of conveying members that feed and convey a sheet placed as a document on the document tray 201. . Like the first reading unit 190, the second reading unit 290 includes a light source, a photoelectric conversion element, and an optical system, and the first reading unit 190 reads the image information. Image information is read from two surfaces.

  The originals stacked on the original tray 201 are fed from the uppermost original by the feed roller 202a. The fed-out document is conveyed while being separated from other documents by the pair of separation rollers 202b and 202c. This document is sequentially conveyed by a plurality of conveying roller pairs 203, 204, 205, 206a, and conveyed to a first reading position. The first reading position is a position where the first surface of the document is scanned by the first reading unit 190, and is located between the scanning glass 110 provided on the scanner main body 100 and the platen roller 207a of the ADF 200 opposed thereto. Refers to the gap.

  The document that has passed the first reading position is transported to the second reading position via the transport roller pair 206b. The second reading position is a position where the second surface of the document is scanned by the second reading unit 290, and indicates a gap between the flow reading glass 210 and the platen roller 207b opposed thereto. The document that has passed through the second reading position is transferred to a discharge roller pair 208 via a conveyance roller pair 206c, and is discharged to a discharge tray 209 by the discharge roller pair 208.

  The operation mode of the image reading device 1 will be described. The first reading unit 190 of the scanner body 100 can read image information from a stationary document placed on the platen glass 120 or a moving document conveyed by the ADF 200. The operation of reading image information from a stationary document is referred to as “fixed reading”, and the operation of reading image information from a moving document while the document is being conveyed to the ADF 200 is referred to as “flow reading”.

  In the case of fixed reading, the original is scanned by moving the first reading unit 190 in the sub-scanning direction (the horizontal direction in FIG. 2) with respect to the stationary original. The ADF 200 is provided with a document pressing plate 211 described below, and presses a document placed on the platen glass 120 and makes the document adhere to the platen glass 120. In the case of drift reading, the first reading unit 190 is positioned below the drift reading glass 110.

[Document holding plate]
The document pressing plate 211 which is a pressing member of the present embodiment will be described in detail. FIG. 3 is a perspective view of the image reading apparatus 1 in a state where the ADF 200 is opened, and FIG. 4 is a schematic view showing a state where the document pressing plate 211 is further opened.

  As shown in FIG. 3, the ADF 200 is rotatably supported by the scanner main body 100 via hinge portions 212, 212, and can be opened upward from the scanner main body 100. The front cover 215 that constitutes the front side of the ADF 200 is provided with a grip 213 that allows the ADF 200 to be opened and closed.

  The document holding plate 211 is attached to the lower surface of the ADF 200. Specifically, the document pressing plate 211 has a pressing surface 217 facing the platen glass 120, and a document pressing frame 214 that supports the pressing surface 217 via cushion members attached to a plurality of positions. When the ADF 200 is closed, the pressing surface 217 presses the original against the platen glass 120 by the elastic force of the cushion member.

  As shown in FIG. 4, the document holding frame 214 is connected to the housing 216 of the ADF 200 via hinge portions 240, 240. The hinges 240, 240 are arranged in parallel with the hinge 212 between the ADF 200 and the scanner main body 100, and like the hinge 212, are arranged on the back side of the image reading apparatus 1. The document holding plate 211 is rotatable around hinge portions 240, 240 in the direction of the arrow in the figure. Further, the rotation of the document pressing plate 211 is restricted by engaging with an engaged portion provided on the ADF 200 as described later.

  With the document holding plate 211 opened, the guide member 226 of the ADF 200 is exposed. The guide member 226 is a guide that scoops up the document that has passed through the above-described first reading position and guides the document inside the ADF 200. The guide member 226 has a rotation axis that extends in the width direction of the document (the depth direction of the image reading device 1). The ADF 200 can be opened and closed with respect to the housing 216. By opening the guide member 226 as shown in FIG. 4, it is possible to easily remove a document jammed inside the ADF 200.

  FIG. 5 is a schematic view of the ADF 200 viewed from below, and FIG. 6 is an enlarged view of a part thereof. As shown in FIGS. 5 and 6, the document pressing plate 211 has an operation unit 219 for opening and closing the document pressing plate 211 on the front side (upper side in FIG. 5) with respect to the pressing surface 217. The operation unit 219 includes a handle 220 that can be operated by a worker using a finger, and a release mechanism described below that can release the engagement between the document pressing plate 211 and the housing 216 of the ADF 200 by operating the handle 220. The handle 220 is the operating tool of the present embodiment. When the document holding plate 211 is in a closed state, the handle 220 is housed in a concave shape 215a formed on the front cover 215 (see FIG. 6).

  FIG. 7 illustrates a cross section of the operation unit 219 (a cross section viewed from the axial direction of the hinge units 240, 240) along the cutting plane XX of FIG. The handle 220 is a rotating member that is attached to a rotating shaft 222 that is rotatably held by the document pressing frame 214 and that rotates together with the rotating shaft 222. A hook 223 is attached to the rotation shaft 222, and the hook 223 rotates together with the handle 220. The hook 223 can be engaged with a cylindrical shaft member 225 fixed to the document holding frame 214. When the hook 223 is engaged with the shaft member 225, the document pressing plate 211 is in a state where it cannot be opened and closed with respect to the housing 216 of the ADF 200 (locked state). The hook 223 is the engaging portion of the present embodiment, and the shaft member 225 is the engaged portion of the present embodiment.

  As shown in FIGS. 8 and 9, two hooks 223 are attached to both ends of the rotating shaft 222. A spring 224 that urges the hook 223 to maintain the engagement with the shaft member 225 is provided between the rotation shaft 222 and the document pressing frame 214.

  As shown in FIG. 10, when the handle 220 rotates counterclockwise in the figure, the hook 223 separates from the shaft member 225. As a result, the document holding frame 214 is separated from the housing 216 of the ADF 200, so that the document holding plate 211 can be opened downward. When closing the document pressing plate 211, the document pressing frame 214 is pressed toward the housing 216 of the ADF 200. Then, after the shaft member 225 comes into contact with the slope 223 a of the hook 223 and the hook 223 temporarily rotates, the hook 223 is engaged with the shaft member 225 by the urging force of the spring 224.

[Shape of operation tool]
Here, the shape of the handle 220 according to the present embodiment will be described in detail. As shown in FIG. 7, the handle 220 has an operation surface 220 a that is operated when the document pressing plate 211 is opened, and a holding mechanism that can hold the document pressing plate 211 when the document pressing plate 211 is open. Surface 220b. The operation surface 220a is a first surface of the present embodiment that can be pressed in a rotation direction (downward in the figure; hereinafter, referred to as a first direction D1) when the document pressing plate 211 is opened. The holding surface 220b is a second surface of the present embodiment that can be pressed in a second direction D2 opposite to the first direction D1.

  With reference to a state in which the ADF 200 is closed and the document pressing plate 211 is closed (the state in FIG. 7), the operation surface 220a is a surface that extends substantially horizontally upward and the holding surface 220b is downward. It is a surface that spreads almost horizontally. The handle 220 has a concave shape that opens downward in the figure as a whole. The holding surface 220b constitutes a concave bottom surface, and the operation surface 220a is located at a peripheral edge farther from the concave rotating shaft 222. The distance between the rotation shaft 222 and the operation surface 220a (the width of the concave opening 220e) is set to be a suitable size for inserting the tip of the finger. In addition, it is preferable that the operation surface 220a is appropriately close to the rotation shaft 222 so that the original pressing plate 211 can be opened with a minimum necessary operation amount (a rotation amount of the handle 220). The distance between the rotating shaft 222 and the operation surface 220a is preferably set, for example, in a range of 12 to 20 mm. When the distance is about 16 mm, a good operation feeling is obtained.

  When the operation surface 220a receives a pulling force in the first direction D1, the handle 220 rotates counterclockwise in the drawing, and the hook 223 is separated from the shaft member 225. At the same time, the document pressing plate 211 is pulled in the first direction D <b> 1 via the rotation shaft 222 and is separated from the housing 216 of the ADF 200. That is, a single operation of pulling the handle 220 with a finger realizes the unlocking and opening operations of the document pressing plate 211.

  After the document pressing plate 211 is opened, the operator can support the holding surface 220b with the finger that has operated the operation surface 220a. That is, when the handle 220 receives a force in the second direction D2 on the holding surface 220b, the drop of the document pressing plate 211 due to its own weight is restricted. Here, it is assumed that the operator's finger mainly supports the holding surface 220b. However, even if the force acting on other portions of the operation unit 219 contributes to holding the document pressing plate 211. I do not care. For example, when the operator's finger is in contact with the lower surface of the rotating shaft 222 or the surface on the opposite side of the operation surface 220a, the force of pressing the operation unit 219 upward at such a contact portion results in the document It acts as a force for supporting the holding plate 211.

  As described above, in this embodiment, the operation surface 220a as the first surface and the holding surface 220b as the second surface are provided in the same operation unit 219. Therefore, after pressing the operation surface 220a to open the document pressing plate 211, it is possible to hold the opened document pressing plate 211 against its own weight by a simple operation of supporting the document pressing plate 211 on the holding surface 220b. It is possible. Further, it is possible to hold the opened document pressing plate 211 without adding a configuration for restricting the document pressing plate 211 from falling, such as using a friction hinge as the hinge portion 240. That is, according to the present embodiment, the operability of the document pressing plate 211 can be improved with a simple configuration.

  Here, the handle 220 is provided with a stopper 220 d that can abut on the document holding frame 214 on the side opposite to the holding surface 220 b with respect to the rotation shaft 222. The stopper 220d can restrict the handle 220 from rotating in the clockwise direction in FIG. By restricting the rotation of the handle 220 by the stopper 220d in the state where the document pressing plate 211 is open, the posture of the handle 220 is stabilized, which contributes to an improvement in operation feeling. As shown in FIGS. 8 and 10, on the same side as the holding surface 220 b with respect to the rotation shaft 222, the rotation range of the handle 220 downward by contacting the protrusion 214 b of the document holding frame 214 is set. A restricting stopper 221 is provided.

  The handle 220 of the present embodiment is a member integrally formed of a resin material, and has an opening 220c between the operation surface 220a and the holding surface 220b. The opening 220c enables a reduction in the manufacturing cost of the handle 220 without deteriorating the operability of the operation unit 219. That is, in the case where the handle 220 is manufactured from a plastic material by injection molding or the like, if the opening 220c is assumed to be closed, the portion including the operation surface 220a is undercut, and the core is removed when the mold is removed. It is necessary to slide.

  On the other hand, the handle 220 of the present embodiment has a first opening 220c from which the operation surface 220a is exposed when viewed from a predetermined direction (first direction D1 in FIG. 7), and a direction opposite to the predetermined direction (second direction D2). And a second opening 220e from which the holding surface 220b is exposed when viewed from above. The handle 220 is a division plane P (see a broken line in FIG. 7) separating the operation surface 220a and the holding surface 220b, and the first three-dimensional shape in contact with the operation surface 220a and the division surface P is in the first direction D1. When the second three-dimensional shape that moves and contacts the holding surface 220b and the dividing surface P moves in the second direction D2, at least the dividing surface P that does not interfere with the first three-dimensional shape and the second three-dimensional shape The shape can be defined as one. Accordingly, the core (A) having the first three-dimensional shape is provided in one mold, the core (B) having the second three-dimensional shape is provided in the other mold, and the core (A) is provided through the openings 220c and 220e. (A) and (B) may be die-cut.

  With such a configuration, the handle 220 can be manufactured without performing undercut processing such as sliding of the core. As a result of the examination using the prototype, it was found that by setting the width of the opening 220c to 8 mm or less, the fitting of the tip of the operator's finger was suppressed, and a good operational feeling was obtained.

  In the first embodiment, the handle 220 having the opening 220c is described. However, as shown in FIG. 11, a handle 220B having a portion corresponding to the opening 220c may be used. However, the modification shown in FIG. 11 has the same configuration as that of the first embodiment except that the opening is closed, and elements having the same configuration and operation as the first embodiment have the same configuration as the first embodiment. Are given.

  Further, as shown in FIG. 12, the rotation direction of the handle 220C may be opposite to that described in the present embodiment. The handle 220 </ b> C extends to the side (the right side in the figure) near the hinge portion 240, which is the center of rotation of the document pressing plate 211, with respect to the rotation shaft 222, and is operated clockwise in the figure, so that the hook 223 is moved. It is separated from the shaft member 225. Also in this case, the same effect as in the first embodiment can be obtained by arranging the operation surface and the holding surface described in the first embodiment on the handle 220C in a state where the positions are reversed in the horizontal direction in the drawing.

  FIG. 13 is a perspective view illustrating the document pressing plate 211B according to the second embodiment. The handle 220 </ b> D of the present embodiment and the hook 223 </ b> B, which is the engaging portion of the present embodiment, are fixed to the document holding frame 214 unlike the first embodiment. For example, the handle 220 </ b> D and the hook 223 </ b> B are formed integrally with the document holding frame 214 by an elastic material.

  The shape of the handle 220D is the same as the handle 220 of the first embodiment. In this case, when the operation surface of the handle 220D is pressed downward in the drawing, the hooks 223B, 223B are displaced in the direction of the arrow in the drawing due to the elastic deformation of the constituent material, and the hooks 223B and 223B are displaced from the engaged portions provided on the housing of the ADF 200. break away.

  Even with such a configuration, by providing the operation surface as the first surface and the holding surface as the second surface on the same operation unit 219, the document can be easily operated by supporting the document pressing plate 211 on the holding surface. It is possible to prevent the holding plate 211 from falling.

(Other embodiments)
In the first and second embodiments, the image reading apparatus 1 installed above the image forming apparatus main body 300 has been described. However, the present technology may be applied to an image reading apparatus independent of the image forming apparatus 10.

  Further, in the first and second embodiments, the case where the sheet jammed in the ADF 200 is removed by making the document pressing plate 211 openable has been described. However, the fixed reading can be executed with the ADF 200 opened. It may be configured. That is, while the ADF 200 is open, the document pressing plate 211 may be opened so that the document can be pressed against the platen glass 120.

DESCRIPTION OF SYMBOLS 1 ... Image reading apparatus / 10 ... Image forming apparatus / 100 ... Main body (scanner main body) / 120 ... Mounting table (platen glass) / 190 ... Reading means (1st reading unit) / 200 ... Sheet conveyance part (ADF) / 211 ... Pressing member (document holding plate) / 220, 220B, 220C ... Operation tool, rotating member (handle) / 220D ... Operation tool (handle) / 220a ... First surface (operation surface) / 220b ... Second surface (Holding surface) / 220c ... first opening (opening) / 220d ... stopper / 220e ... second opening (opening) / 223, 223B ... engaging part (hook) / 225 ... engaged part (Shaft member) / 301 image forming means (electrophotographic unit) / D1 first direction / D2 second direction

Claims (9)

A main body having a mounting table on which the sheet is mounted,
A sheet conveying unit that conveys a sheet, the sheet conveying unit being supported by the main body and capable of opening upward with respect to the main body,
A reading unit arranged on the main body and reading image information from a sheet placed on the mounting table or a sheet transported by the sheet transport unit,
A pressing member that is rotatably supported by the sheet conveying unit and presses a sheet placed on the mounting table,
An operating tool provided on the pressing member and capable of releasing the engagement between the pressing member and the sheet conveying unit,
The operating tool is configured to press a first surface that can be pressed in a first direction away from the sheet conveying unit in a rotation direction of the pressing member with respect to the sheet conveying unit, and press in a second direction opposite to the first direction. A second surface capable of disengaging the pressing member and the sheet conveying portion when the first surface receives the force in the first direction, and the pressing member is opened. In the state, the rotation of the pressing member in the first direction can be regulated by receiving the force in the second direction on the second surface.
An image reading apparatus, comprising: The second surface is a part of a concave shape that is concave in the second direction in a cross section viewed from an axial direction of a rotation axis of the pressing member,
The first surface is provided at a peripheral portion on a side remote from the rotation shaft in the concave shape in a cross section viewed from the axial direction,
The image reading device according to claim 1, wherein: The first surface is a surface facing upward in a state where the sheet conveying unit is closed,
The second surface is a surface facing downward in a state where the sheet conveying unit is closed,
The image reading device according to claim 1, wherein: The operation tool is a member in which the first surface and the second surface are integrally formed of a resin material, and a first opening that exposes the first surface when viewed from a predetermined direction; A second opening that exposes the second surface when viewed from a direction opposite to a predetermined direction,
The operation tool is a division surface that separates the first surface and the second surface, and a first three-dimensional shape that is in contact with the first surface and the division surface moves in the predetermined direction, and A dividing surface that does not interfere with the first three-dimensional shape and the second three-dimensional shape when the second three-dimensional shape in contact with the second surface and the dividing surface moves in a direction opposite to the predetermined direction; Is a shape that can define
The image reading device according to claim 1, wherein: The operating tool is a rotating member that is rotatable with respect to the pressing member.
The image reading apparatus according to claim 1, wherein: The pressing member rotates with the operation tool, and has an engaging portion that engages with an engaged portion provided in the sheet conveying portion,
By the operation of pressing the first surface of the operating tool in the first direction, the engaging portion is separated from the engaged portion, and the pressing member rotates in the first direction.
The image reading device according to claim 5, wherein: The operating tool has a stopper that can abut the pressing member, and when the second surface receives a force in the second direction in a state where the pressing member is opened, the operating member rotates by the stopper. Regulated,
The image reading device according to claim 5, wherein: The pressing member has an engaging portion that engages with an engaged portion provided in the sheet conveying portion, and is formed of an elastic material.
The operating tool is fixed to the pressing member,
By the operation of pressing the first surface of the operating tool in the first direction, the engaging portion is separated from the engaged portion, and the pressing member rotates in the first direction.
The image reading apparatus according to claim 1, wherein: An image reading device according to any one of claims 1 to 8,
Image forming means for forming an image on a recording material based on image information read by the image reading device,
An image forming apparatus comprising:

Images