Sheet conveying device, image reading device, and image forming apparatus

Abstract

To provide a sheet conveying device, an image reading device, and an image forming apparatus having a rotary member of an ejection tray that is easily operated.SOLUTION: An ADF 310 has a document tray 320, an ejection roller 313, and a document ejection tray 319. The document ejection tray 319 is provided with an ejection extended tray 318 that is movable to a stored position and a drawn position, and the ejection extended tray 318 is provided with a rotary member 318c that is rotatable to a fallen position and a standing position. When the ejection extended tray 318 moves from the stored position to the drawn position, the rotary member 318c is moved by an urging member 326 from the fallen position to the standing position.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a sheet transport device that transports a sheet, and an image reading device and an image forming apparatus that are equipped with the same. [Background technology]

[0002] An image reading device mounted on an image forming apparatus such as a copying machine or a multifunction machine is provided with an automatic document feeder (hereinafter referred to as an ADF: Auto Document Feeder) that automatically feeds original sheets one by one. The sheets fed by the ADF have their image information read by an image sensor, and are then loaded on a sheet stacking unit such as a discharge tray. Patent Document 1 describes a sheet conveying device having a sheet discharge tray to which sheets are discharged, an extension tray that can be pulled out from the sheet discharge tray, and a rotating member (swinging member) that is rotatably supported on the extension tray. When using the device, a user can raise the rotating member provided on the extension tray to improve the alignment of the sheets on the discharge tray. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-80046 Summary of the Invention [Problem to be solved by the invention]

[0004] In some ADFs, the ejection tray is located below the document tray. In such cases, when rotating the rotating member on the extension tray, it is necessary to work in the narrow space below the document tray. Therefore, there was a need to improve the operability of raising the rotating member.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a sheet transport device, an image reading device, and an image forming apparatus in which the rotating member of the discharge tray can be easily operated. [Means for solving the problem]

[0006] One aspect of the present invention is a sheet transporting device comprising a loading tray on which sheets are loaded, a transport means for transporting the sheets loaded on the loading tray, a discharge means for discharging the sheets transported by the transport means, a discharge tray arranged below the loading tray and on which sheets discharged by the discharge means are loaded, an extension tray provided on the discharge tray and movable between a first position stored in the discharge tray and a second position pulled out from the discharge tray, a rotating member provided on the extension tray and rotatable between a third position and a fourth position which is a position rotated upward from the third position and restricts movement of the sheets discharged by the discharge means in the discharge direction, and a biasing means for biasing the rotating member in a direction from the third position to the fourth position, wherein when the extension tray moves from the first position to the second position, the rotating member moves from the third position to the fourth position by the biasing means. Effect of the Invention

[0007] According to the present invention, it is possible to provide a sheet transport device, an image reading device, and an image forming device in which the rotating member of the discharge tray can be easily operated. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a perspective view of the image forming apparatus as viewed from the front side. [Diagram 2] FIG. 2 is a perspective view of the image forming apparatus as viewed from the right front side. [Diagram 3] FIG. 2 is a perspective view showing a state in which a pressure plate unit of the image forming apparatus is open. [Figure 4] FIG. 1 is a cross-sectional view showing a schematic configuration of an image forming apparatus. [Diagram 5] Cross-section of the ADF. [Figure 6] 4 is a side view showing the rotation range of the operation panel with the document feed tray and document discharge tray of the image forming apparatus pulled out. FIG. [Figure 7]FIG. 4 is a cross-sectional view showing the output extension tray and the rotating member in the storage position. [Figure 8] FIG. 13 is a cross-sectional view showing the output extension tray when it is being pulled out from the storage position. [Figure 9] FIG. 13 is a cross-sectional view showing the output extension tray and the rotating member in the pulled-out position. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 13 is a perspective view showing a state in which a rotating member is removed from the output extension tray. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the following preferred embodiments are merely examples of the present invention and are not intended to limit the technical scope of the present invention.

[0010] [Image forming equipment] First, an image forming apparatus 100 according to the present embodiment will be described. The image forming apparatus 100 is a printer capable of forming a full-color image on a sheet. In this embodiment, the image forming apparatus 100 includes an image forming apparatus main body 200 having an image forming section 201 for forming an image on a sheet, and an image reading apparatus 300 having a reading unit 301 as an image reading section for reading an image of a document. The image reading apparatus 300 is provided on the upper part of the image forming apparatus main body 200. In the following, the sheet includes not only plain paper, but also special paper such as coated paper, recording materials having special shapes such as envelopes and index paper, and plastic films and cloths for overhead projectors, and a document is also an example of a sheet.

[0011] Image forming apparatus 100 is provided with an operation panel 400 as an operation unit for receiving operations from an operator on the front side of the apparatus (the front side in FIG. 1, the front left side in FIGS. 2 and 3, and the right side in FIG. 4). Operation panel 400 has a physical switch 401 such as a start button, and a display unit 402 such as a liquid crystal screen that can display various information and can be operated by touch. In this embodiment, as shown in FIGS. 1 and 2, operation panel 400 is disposed on the front side of image forming apparatus 100 (the surface on the front side of the apparatus), shifted to the left from the center of the apparatus when viewed from the front side. Note that operation panel 400 may be shifted to the right side.

[0012] Hereinafter, the side on which operation panel 400 is arranged will be referred to as the front side, front side or front face of the device, and the opposite side will be referred to as the rear side, rear side or back side of the device (the rear side in Fig. 1, the right rear side in Figs. 2 and 3, and the left side in Fig. 4). Furthermore, when simply referring to "right" or "left", it will refer to the case where image forming apparatus 100 is viewed from the front side. Furthermore, the direction from the front side of the device to the rear side of the device and the direction from the rear side of the device to the front side of the device will be referred to as the front-rear direction, and the left-right direction when image forming apparatus 100 is viewed from the front side will be simply referred to as the "left-right direction" or "width direction".

[0013] In this embodiment, as described later, the image forming unit 201 is an inkjet type image forming unit that forms an image by ejecting ink onto a sheet. For this reason, remaining ink display units 202a and 202b that display the remaining ink amounts used in the image forming unit 201 are arranged on the front side of the image forming apparatus 100. The remaining ink display unit 202a on the right side of the image forming apparatus 100 indicates the remaining ink amounts of yellow, magenta, and cyan colors, and the remaining ink display unit 202b on the left side indicates the remaining ink amount of black ink. In this embodiment, the remaining ink display units 202a and 202b are windows formed so that the remaining ink amounts in the ink tanks of each color can be seen, but they may also be display units such as liquid crystal screens that display images according to the remaining ink amounts of each color. In addition, the positions of the remaining ink display units for the color inks and black ink may be reversed, or may be arranged together on either the left or right side.

[0014] Further, a USB terminal 101 for connecting to an external terminal such as a personal computer is provided on the front surface of the image forming apparatus 100. The USB terminal 101 may be provided on the right or left side surface of the image forming apparatus 100, or on the rear surface. In this embodiment, the USB terminal 101 is provided on the front surface of the image forming apparatus 100 to improve operability from the front surface of the image forming apparatus 100.

[0015] [Image forming device body] Next, the image forming apparatus main body 200 will be described. As shown in Fig. 4, the image forming apparatus main body 200 has a cassette 203, a pickup roller 204 as a sheet feeding section, an image forming section 201, a pair of discharge rollers 205 as a sheet discharge section, and the like. The cassette 203 as a sheet supporting section supports a sheet. The pickup roller 204 feeds the sheet supported by the cassette 203. The image forming section 201 forms an image on the sheet fed from the pickup roller 204. The pair of discharge rollers 205 discharges the sheet on which the image has been formed by the image forming section 201. A detailed description will be given below.

[0016] The cassette 203 can accommodate a plurality of sheets, and the plurality of sheets are supported in a stacked state within the cassette 203. The cassette 203 can be inserted into and pulled out of the housing 210 of the image forming apparatus main body 200. The direction in which the cassette 203 is pulled out is the front side of the apparatus. That is, when storing sheets in the cassette 203, the cassette 203 is pulled out toward the front side of the apparatus. Then, the cassette 203 containing the sheets is pushed toward the rear side of the apparatus to mount the cassette 203 in the housing 210. For this purpose, a cassette gripping portion 203a (see FIGS. 1 and 2, etc.) is provided on the front side of the cassette 203 for an operator to grasp by hand and pull out the cassette 203.

[0017] The pickup roller 204 picks up the sheets in the cassette 203. The topmost sheet in the cassette 203 is picked up by the pickup roller 204 and fed toward the conveying path 206a. The pickup roller 204 feeds the sheet in a direction from the front side of the apparatus to the rear side of the apparatus.

[0018] The sheet conveyed through the conveying path 206a reaches a pair of registration rollers 207, which serves as a conveying member for conveying the sheet. The pair of registration rollers 207, which is in a state where the rotation of the pair of registration rollers 207 is stopped, is struck by the sheet conveyed from the conveying path 206a. This corrects the skew of the sheet. Next, the pair of registration rollers 207 starts rotating in synchronization with the image formation timing of the image forming unit 201, and sends the sheet into the image forming unit 201.

[0019] In addition, a reverse conveying path 206b is provided upstream of the registration roller pair 207 in the sheet conveying direction to reverse the sheet conveyed in the reverse direction and send it to the image forming unit 201. When forming images on both sides of a sheet, an image is formed on one side of the sheet conveyed from the conveying path 206a by the image forming unit 201. Next, the sheet with the image formed on one side is conveyed in the reverse direction, and the conveying path is switched by a switching member (not shown) to be guided to the reverse conveying path 206b. Then, the reversed sheet reaches the registration roller pair 207 again, and the image forming unit 201 forms an image on the back side of the sheet.

[0020] In this embodiment, a manual feed tray 208 is provided at the top of the image forming apparatus 100 on the rear side of the apparatus. The manual feed tray 208 is rotatable between a storage position shown in FIG. 4 and a loading position where the manual feed tray 208 can be opened from the storage position and a sheet can be loaded. At the loading position, the sheet can be fed into the apparatus. Specifically, the sheet loaded on the manual feed tray 208 is conveyed into a conveying path by a feed roller (not shown). The sheet conveyed in the conveying path reaches a pair of registration rollers 207. Thereafter, the same process is performed as for the sheet conveyed from the cassette 203. The manual feed tray 208 is provided at the rear side of the image reading device 300, and is designed not to protrude from the rear surface of the housing 210 of the image forming apparatus main body 200 and the top surface of the image reading device 300 at the storage position.

[0021] As described above, the image forming unit 201 employs a conventional inkjet method for ejecting ink to form an image on a sheet. That is, the image forming unit 201 has a recording head capable of ejecting ink of each color, and the recording head of each color ejects ink toward the sheet conveyed by the registration roller pair 207 in response to an image signal input from the image reading device 300 or an external terminal. In this way, an image is formed on the sheet. Note that the image forming unit 201 may be an electrophotographic image forming unit using toner.

[0022] The pair of discharge rollers 205 discharges the sheet on which an image has been formed by the image forming unit 201 onto a discharge tray 209. The pair of discharge rollers 205 discharges the sheet in a direction from the rear side of the device toward the front side of the device. The discharge tray 209 can be inserted into and pulled out of a housing 210. The pull-out direction of the discharge tray 209 is toward the front side of the device. For this reason, a discharge tray gripper 209a (see FIGS. 1 and 2, etc.) is provided on the front side of the discharge tray 209 so that an operator can grasp it with their hands to pull out the discharge tray 209.

[0023] [Image reader] Next, the image reading device 300 will be described. As shown in Fig. 3 and Fig. 4, the image reading device 300 has an ADF 310 as an automatic document feeder, a document table glass 302, a pressure plate section 303 as a document pressing section, two hinge sections 304 (Fig. 3) as a rotation support section, a reading unit 301, and the like. The image reading device 300 of this embodiment can read an image of a document in two modes, a flow reading mode and a fixed reading mode. The flow reading mode is a mode in which the image of the document is read by the reading unit 301 while the document is being transported by the ADF 310. The fixed reading mode is a mode in which the image of the document is read by placing the document on the document table glass 302 and moving the reading unit 301 while the document is pressed against the document table glass 302 by the pressure plate section 303.

[0024] [Document glass and pressure plate] First, the configuration of the platen glass 302 and the pressure plate unit 303 will be described with reference to Fig. 1 to Fig. 3. The platen glass 302 has a platen surface 302a on which a document is placed. That is, the image reading device 300 has a platen 332 on which the platen glass 302 and the reading glass 333 are provided. The upper surface of the platen glass 302 serves as the platen surface 302a.

[0025] The platen glass 302 is provided over the entire range in which the reading unit 301 moves to read so that the image of the document placed on the platen glass 302 can be read by the reading unit 301 when the fixed reading mode is performed. On the other hand, the reading glass 333 is provided at an image reading position (flowing reading position) on the rear side of the platen glass 302. In other words, the reading glass 333 is provided at a position where the reading unit 301 stops when the flowing reading mode is performed. When the flowing reading mode is performed, the reading unit 301 moves to a position facing the reading glass 333 and reads the image of the document transported by the ADF 310 (described later) through the reading glass 333.

[0026] A pressure platen unit 303 as an original pressing unit presses an original placed on the original table glass 302 against the original table glass 302. The pressure platen unit 303, together with an ADF 310 described later, is supported by a hinge unit 304 as a rotation support unit to be rotatable with respect to a housing 330a on the original table 332 side of the image reading device 300 between a closed position shown in Fig. 1 and Fig. 2 and an open position shown in Fig. 3.

[0027] The closed position is a position where the pressure platen 303 presses the original against the platen glass 302. The open position is a position where the platen glass 302 is opened so that an original can be placed on the platen glass 302. The hinge portion 304 supports the pressure platen 303 rotatably about a rotation shaft with respect to the housing 330a of the image reading device 300. The rotation shaft is disposed in a direction from the front side of the device to the rear side of the device, and in a direction along the width direction (left-right direction) that is perpendicular to the up-down direction.

[0028] The hinge unit 304 is disposed on the inner side of the document table glass 302, and a gripping unit 323 that can be gripped in order to rotate the pressure plate unit 303 from the closed position to the open position is disposed on the end of the pressure plate unit 303 on the front side of the device. The gripping unit 323 is a recess formed on the end surface of the pressure plate unit 303 on the front side of the device so that an operator can insert his / her hand and lift the pressure plate unit 303 in order to rotate the pressure plate unit 303 to the open position. The gripping unit 323 can also be inserted and pressed down in order to rotate the pressure plate unit 303 from the open position to the closed position. Such a gripping unit 323 also serves as a gripping unit for pulling out the sub-tray 322 of the document tray 320, as will be described later.

[0029] In this embodiment, the hinge portion 304 is disposed on the rear side of the apparatus, and the grip portion 323 is disposed on the front side of the apparatus. Therefore, an operator grasps the grip portion 323 from the front side of the apparatus to open or close the pressure plate portion 303. For example, when rotating the pressure plate portion 303 from the closed position to the open position, the operator grasps the grip portion 323 and lifts the pressure plate portion 303. At this time, the end portion of the pressure plate portion 303 on the front side of the apparatus follows a trajectory centered on the rotation axis of the hinge portion 304, which is positioned closer to the rear of the apparatus as it moves upward.

[0030] 3, at the end of the platen glass 302, a first abutment portion 305 and a second abutment portion 306 are provided against which the edge of the document placed on the document placement surface 302a abuts in order to position the document at a reference position for reading the document. The first abutment portion 305 positions the document in the front-rear direction, and the second abutment portion 306 positions the document in the left-right direction.

[0031] [ADF] Next, the ADF 310 will be described with reference to FIG. 4 and FIG. 5. The ADF 310 is provided on the pressure plate section 303, and includes a document tray 320, a document feed section 311, a back side reading unit 312, and a discharge roller 313 as a document discharge section. The document tray 320 as a document support section supports a document. The document feed section 311 feeds the document supported by the document tray 320. The back side reading unit 312 reads an image on the back side of the document fed from the document feed section 311. The image on the front side of the document is read by the reading unit 301 as an image reading section. The discharge roller 313 discharges the document whose image has been read by the reading unit 301 or the back side reading unit 312. In this embodiment, the maximum size of the document that can be transported by the ADF 310 is A4 portrait size. That is, the document can be transported so that the longitudinal direction of the document of the maximum document size, A4 size, becomes the transport direction. A detailed description will be given below.

[0032] At least a part of the document tray 320 is arranged to be slidable toward the front side of the device with respect to the housing 330 on the ADF 310 side of the image reading device 300. Specifically, the document tray 320 has a main tray 321 as a first support part having a first support surface 321a that supports a document, and a sub-tray 322 as a second support part and a sliding support part having a second support surface 322a that supports a document together with the first support surface 321a. The sub-tray 322 is arranged to be slidable between a non-use position and a use position that is closer to the front side of the device than the non-use position with respect to the housing 330 having the pressure plate part 303, and forms a support surface that can support a document at the use position. Details of the document tray 320 will be described later.

[0033] Original feeding section 311 has a pickup roller 314, a separation roller 315, a separation pad 316, etc. Pickup roller 314 picks up the topmost original placed on original tray 320. Separation roller 315 and separation pad 316 are arranged to be in pressure contact with each other, and separate the originals picked up by pickup roller 314 one by one and transport them to transport path 317. Original feeding section 311 feeds the originals in a direction from the front side of the device to the back side of the device.

[0034] A transport roller 317a is provided in the middle of the transport path 317 as a document transport section for transporting the document, and the document separated and transported by the separation roller 315 is transported further downstream by the transport roller 317a. That is, the transport roller 317a transports the document fed from the document feed section 311 toward the image reading position. Then, the image on the front side of the document is read by the reading unit 301 located at the image reading position. In addition, a back side reading unit 312 is disposed downstream of the image reading position in the document transport direction on the transport path 317, at a position facing the back side of the document passing through the transport path 317. When the operator instructs to read the back side of the document, the back side reading unit 312 also reads the image on the back side of the document.

[0035] The discharge rollers 313 discharge the document, whose image has been read by the reading unit 301 or the back side reading unit 312, onto a document discharge tray 319. The discharge rollers 313 discharge the document in a direction from the rear side of the apparatus to the front side of the apparatus.

[0036] Original documents discharged from discharge rollers 313 are placed on original document discharge tray 319 as a placement section. Original document discharge tray 319 has discharge extension tray 318 for supporting original documents together with original document discharge tray 319. Such discharge extension tray 318 can be inserted into and pulled out of housing 330. Discharge extension tray 318 is pulled out toward the front side of the device. For this reason, discharge tray gripping section 318a (see FIGS. 1 and 2, etc.) is provided on the front side of discharge extension tray 318 so that an operator can grip it to pull out discharge extension tray 318.

[0037] The reading unit 301 and the back side reading unit 312 are, for example, contact image sensors (CIS). The CIS irradiates light from a light source such as an LED onto a surface of the document on which an image is present, and uses a self-focusing rod lens array to focus the light reflected from that surface onto a sensor element, thereby reading image information of the document. As described below, the reading unit 301, which reads the front side of the document, is movable inside the document table glass 302, and is stopped at an image reading position when reading an image of the document conveyed by the ADF 310 (i.e., in the case of a running reading mode). In this embodiment, the reading unit 301 is configured to move in the front-rear direction of the device.

[0038] [Document Tray] As described above, in document tray 320 as a loading tray, sub-tray 322 as a second support part can slide relative to main tray 321 as a first support part between a non-use position and a use position. The non-use position is a position where sub-tray 322 covers the upper part of main tray 321 with second support surface 322a positioned above back surface 322b that is the surface behind second support surface 322a. In other words, the non-use position is a storage position where sub-tray 322 is stored in housing 330, and is the position shown in FIGS.

[0039] The second support surface 322a of the sub-tray 322 faces upward even when in the non-use position, and is not configured such that, for example, the sub-tray rotates when stored so that the back surface faces upward. The second support surface 322a of the sub-tray 322 forms the exterior surface of the image reading device 300 when in the non-use position. In other words, the second support surface 322a also serves as an exterior cover of the image reading device 300.

[0040] In this embodiment, when the sub-tray 322 is in the non-use position, it is continuous with the upper surface 331 of the housing 330 with almost no step, and when the image forming apparatus 100 is installed in the installation location, the second support surface 322a and the upper surface 331 are approximately parallel to the horizontal plane. Therefore, it is possible to place documents and the like on the second support surface 322a and the upper surface 331.

[0041] The second support surface 322a of the sub-tray 322 is continuous with the upper surface 331 with almost no gap or with a small gap (for example, 1 mm or less) when the sub-tray 322 is in the unused position. There may be a step between the second support surface 322a and the upper surface 331, or the second support surface 322a may be inclined with respect to the horizontal plane when the sub-tray 322 is in the unused position. The second support surface 322a of the sub-tray 322 may not be exposed upward when stored in the housing 330. For example, the sub-tray 322 may be configured to be stored below the top plate of the housing 330 and above the main tray 321. In short, it is sufficient that the sub-tray 322 is configured to be stored above the main tray 321 by sliding movement.

[0042] The use position is a position where the second supporting surface 322a is positioned above the back surface 322b and supports the document together with the first supporting surface 321a. That is, it is the position shown in Figs. 4 and 5, and is the document set position where the document is set. When the sub-tray 322 is in the use position, the second supporting surface 322a has a larger inclination angle with respect to the horizontal plane than the first supporting surface 321a. The inclination direction of the second supporting surface 322a at this time is a direction in which the second supporting surface 322a is inclined downward toward the downstream side in relation to the document feeding direction.

[0043] In this embodiment, the subtray 322 is positioned at the use position by pulling the subtray 322 out from the non-use position towards the front of the device. That is, the direction in which the subtray 322 slides from the non-use position to the use position is from the rear of the device towards the front of the device. When returning the subtray 322 from the use position to the non-use position, the subtray 322 is pushed towards the rear of the device while returning the inclination of the subtray 322 to the state in the non-use position, thereby positioning the subtray 322 at the non-use position.

[0044] Further, a gripping portion 323 is provided at the end of the subtray 322 on the front side of the device as a sliding gripping portion that grips the subtray 322 to slide and move it. As shown in Fig. 5, the gripping portion 323 has a notch portion 323a that is cut out so as to open downward at a part of the end of the subtray 322 on the front side of the device, and a recessed portion 323b that is recessed upward on the rear side of the notch portion 323a. When drawing out the subtray 322 to the front side of the device, for example, an operator inserts his / her finger into the recessed portion 323b and pulls the subtray 322 to the front side of the device. On the other hand, when rotating the pressure plate portion 303 from the closed position to the open position, for example, an operator inserts his / her hand into the notch portion 323a and lifts the pressure plate portion 303.

[0045] Incidentally, discharge extension tray 318 is located below cutout portion 323a. By inserting a hand into cutout portion 323a, it is possible to grip discharge tray grip portion 318a described above. Also, by inserting a hand into cutout portion 323a and gripping and pushing down discharge tray grip portion 318a of discharge extension tray 318 in a state where it is not pulled out, i.e., in an inserted state, it is possible to rotate pressure plate portion 303 from the open position to the closed position.

[0046] In this embodiment, the grip portion 323 thus serves as a grip portion for pulling out the sub-tray 322 and for opening and closing the pressure plate portion 303 .

[0047] [Extension output tray] Next, the configuration of discharge extension tray 318 will be described with reference to Fig. 7 to Fig. 12. As shown in Fig. 11, discharge extension tray 318 has extension tray main body 318b and rotating member 318c. Extension tray main body 318b is provided so as to be slidable between a stored position (first position) stored in document discharge tray 319 and a pulled-out position (second position) pulled out from document discharge tray 319. In addition, extension tray main body 318b is formed with recessed portion 318g, and rotating member 318c is stored so as to fit into recessed portion 318g (see Fig. 7).

[0048] As shown in FIG. 12, the rotating member 318c has two rotating shafts 318d protruding on both sides in the width direction, and the extension tray main body 318b has two holes 318f into which the rotating shafts 318d fit. As a result, the rotating member 318c can rotate between a reclined position (third position) stored in the recessed portion 318g and an upright position (fourth position) in which the rotating member 318c rotates upward from the reclined position and stands up relative to the extension tray main body 318b. In the upright position, the rotating member 318c restricts the movement of the document discharged by the discharge roller 313 in the discharge direction. This makes it possible to prevent the document discharged by the discharge roller 313 from flying out of the device, improving the stacking ability of the document on the document discharge tray 319. As described above, the rotating member 318c is stored in the reclined position so as to fit into the recessed portion 318g. At this time, the rotating member 318c is in a state parallel to the extension tray main body 318b. The rotating direction of the rotating member 318c from the reclined position to the erected position is a direction from downstream to upstream in the discharge direction.

[0049] Two ribs 324 are formed on the upper surface of the rotating member 318 when it is in the reclined position (the surface on the upstream side in the discharge direction when it is in the upright position). The ribs 324 come into contact with the leading edge of the document discharged by the discharge rollers 313.

[0050] In addition, a biasing member 326 is provided on the rotation shaft 318d of the rotation member 318c. The biasing member 326 is a torsion coil spring that biases the rotation member 318c from the reclined position to the upright position. The rotation member 318c is rotated from the reclined position to the upright position by the biasing force of the biasing member 326. The hole 318f has a protruding portion 327 that protrudes inward in a cross section perpendicular to the axial direction of the rotation shaft 318d, and the rotation shaft 318d has a flat portion 318e. When the rotation member 318c is rotated by the biasing member 326, the protruding portion 327 comes into contact with the flat portion 318e. As a result, the rotation member 318c is held in the upright position.

[0051] 7, the discharge extension tray 318 is stored in the space below the cover portion 325 of the document discharge tray 319. The cover portion 325 is a portion that covers the discharge extension tray 318 and the rotating member 318c in the stored position, and functions as a support surface that supports the discharged documents. As described above, the rotating member 318c tries to move from the reclined position to the upright position due to the action of the biasing member 326, but when the discharge extension tray 318 is in the stored position, the rotating member 318c is held in the reclined position by being pressed down by the cover portion 325.

[0052] When the discharge extension tray 318 is pulled out from the document discharge tray 319, the rotating member 318c is released from the cover portion 325 and stands up due to the biasing force of the biasing member 326. Then, as shown in Fig. 9, when the discharge extension tray 318 moves to the pulled-out position, the rotating member 318c is held in the upright position. In this manner, when the discharge extension tray 318 moves from the stored position to the pulled-out position, the biasing member 326 moves the rotating member 318c from the reclined position to the upright position.

[0053] 8, when the discharge extension tray 318 moves from the pulled-out position to the stored position, first, the rib 324 of the rotating member 318c abuts against the cover portion 325. Then, when the discharge extension tray 318 is further stored, the rib 324 slides against the cover portion 325, and the rotating member 318c moves to the reclined position.

[0054] As described above, in this embodiment, when the discharge extension tray 318 moves from the storage position to the pull-out position, the rotating member 318c moves from the reclined position to the erected position by the biasing member 326. This simplifies the operation for the user to raise the rotating member 318c, improving operability.

[0055] In addition, in this embodiment, when the discharge extension tray 318 moves from the pulled-out position to the stored position, the rotating member 318c moves from the upright position to the reclined position by the cover portion 325. This makes it possible to simplify the operation of the user when moving the rotating member 318c to the reclined position.

[0056] Furthermore, in this embodiment, the rotating member 318c has a rib 324 that abuts against the cover portion 325. This makes it possible to reduce resistance when the rotating member 318c slides against the cover portion 325, further improving operability. [Explanation of symbols]

[0057] 100 Image forming device 300 Image reader 310 ADF 318 Extension output tray 318c Rotating member 319 Document output tray 326 Pressurizing member

Claims

1. A loading tray on which sheets are loaded; a conveying means for conveying the sheets stacked on the stacking tray; a discharge means for discharging the sheet conveyed by the conveying means; a discharge tray disposed below the stacking tray and on which the sheets discharged by the discharge means are stacked; an extension tray provided on the discharge tray and movable between a first position stored in the discharge tray and a second position pulled out from the discharge tray; a rotating member provided on the extension tray and rotatable between a third position and a fourth position rotated upward from the third position and restricting movement of the sheet discharged by the discharge means in a discharge direction; a biasing means for biasing the rotating member in a direction from the third position toward the fourth position; Equipped with When the extension tray moves from the first position to the second position, the rotating member moves from the third position to the fourth position by the biasing means. A sheet conveying device comprising:

2. the ejection tray has a cover portion that covers an upper portion of the extension tray and the rotating member when the extension tray is located at the third position, When the extension tray moves from the second position to the first position, the rotating member abuts against the cover portion and moves from the fourth position to the third position against the biasing means.

2. The sheet transport device according to claim 1.

3. The rotating member has a rib that comes into contact with the cover portion.

3. The sheet transport device according to claim 2.

4. the extension tray has a recess into which the rotating member located at the third position fits; 2. The sheet transport device according to claim 1.

5. A rotation direction of the rotating member from the third position to the fourth position is a direction from downstream to upstream in the discharge direction.

2. The sheet transport device according to claim 1.

6. The biasing means is a torsion coil spring provided on a rotation shaft portion of the rotating member.

2. The sheet transport device according to claim 1.

7. A sheet conveying device according to any one of claims 1 to 6, a reading means for reading an image on the sheet conveyed by the conveying means.

1. An image reading apparatus comprising:

8. The image reading device according to claim 7 ; and an image forming unit that forms an image on a recording material based on the image on the sheet read by the reading unit.

1. An image forming apparatus comprising:

Images