JP2018127300A - Sheet stacking device and image formation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet stacking device which is difficult for the sheet stacked on stacking means to drop from the stacking means.SOLUTION: A document discharge tray 52 is rotatable and sheets are stacked thereon. A document charge tray 51 can open and close an upper part of the document discharge tray 52. A projection part 54 and an abutment plate 53 are provided on at least one of the document discharge tray 52 and the document charge tray 51, and in conjunction with the opening of the document charge tray 51 above the document discharge tray 52, the projection part 54 and the abutment plate 53 block an open area generated between the document discharge tray 52 and the document charge tray 51 and facing downward when the document discharge tray 52 rotates.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a sheet stacking apparatus on which sheets are stacked.

  2. Description of the Related Art An image forming apparatus equipped with an automatic document feeder that takes out originals loaded on an upper stacking tray one by one, reads an image of the original, transports it to a lower stacking tray, and discharges it is widely used. In such an automatic document feeder, a platen glass is disposed below the automatic document feeder, and the automatic document feeder that also functions as a pressure plate that presses a document placed on the platen glass from above is a backside. It is configured to be rotatable with the side as a rotation fulcrum. For this reason, when the automatic document feeder is rotated, the upper stacking tray is rotated rearward so that the documents stacked on the lower stacking tray are not separated from each other by the gap between the upper stacking tray and the lower stacking tray. There is a possibility of falling from.

  In Patent Document 1, a stopper member that is a detachable abutting portion that connects an upper stacking tray and a lower stacking tray is provided, and the upper stacking tray and the lower stacking tray are integrally rotated rearward. The document that slides backward is received by the stopper when it is touched.

Japanese Patent Laid-Open No. 11-20957

  In order to make it easy to take out the documents loaded on the lower stacking tray, the upper stacking tray may be provided so as to be largely movable upward. For example, as shown in FIG. 3, the upper stacking tray (51) is pivoted upward to widen the space between the lower stacking tray (53) and the lower stacking tray (53). The original is removed.

  However, when the upper stacking tray is largely movable upward with respect to the lower stacking tray, when the lower stacking tray is turned rearward and turned upright, the upper stacking tray becomes the lower stacking tray. May open wide. Then, there is a possibility that the document loaded on the lower stacking tray may fall through the wide gap (SM) between the upper stacking tray and the lower stacking tray.

  An object of the present invention is to provide a sheet stacking apparatus in which sheets stacked on the stacking unit are unlikely to fall from the stacking unit.

  The sheet stacking apparatus according to the present invention includes a rotatable stacking unit for stacking sheets, an opening / closing unit capable of opening and closing above the stacking unit, and at least one of the stacking unit and the opening / closing unit. In conjunction with opening the upper portion of the loading means, and shielding means for closing an open area that occurs between the loading means and the opening / closing means and faces downward when the loading means rotates. Is.

  According to the present invention, it is possible to make it difficult for the sheets stacked on the stacking unit to fall from the stacking unit.

FIG. 2 is an explanatory diagram of a configuration of the copier according to the first embodiment. 2 is an explanatory diagram of a configuration of an automatic document feeder. FIG. FIG. 6 is an explanatory diagram of a rotation operation of a document supply tray. FIG. 6 is an explanatory diagram of a normal state of a document supply tray. FIG. 6 is an explanatory diagram of an open state of a document supply tray. It is a perspective view of the abutting board and protrusion part in a normal state. It is a perspective view of the abutting board and protrusion part in an open state. FIG. 6 is a perspective view of the abutting plate and the protruding portion when the automatic document feeder is raised. FIG. 10 is an explanatory diagram of the operation of the sheet restriction plate in the second embodiment. (A) is a normal state, (b) is an open state. FIG. 6 is a perspective view of the abutting plate and the protruding portion when the automatic document feeder is raised. It is explanatory drawing of the example of other embodiment. (A) is an insertion system, (b) is a bellows system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Embodiment 1>
In the first embodiment, an embodiment of a sheet stacking device mounted as an automatic document feeder in the image forming apparatus will be described.

(Image forming device)
FIG. 1 is an explanatory diagram of the configuration of the copying machine according to the first embodiment. As shown in FIG. 1, a copying machine 10, which is an example of an image forming apparatus, is an electrophotographic image forming apparatus that can form an image of a document G read by an image reading apparatus 11 on a sheet P. The image forming unit 12 and the fixing device 26, which are examples of image forming means, form an image on the sheet P of the recording medium based on the image read by the image reading device 11.

  The image forming unit 12 includes a charging roller 21, an exposure device 22, a developing device 23, a transfer roller 24, and a drum cleaning device 25 around the photosensitive drum 20. The photosensitive drum 20 has a photosensitive layer formed on the peripheral surface thereof, and is driven to rotate in the direction of arrow A. The charging roller 21 is applied with a charging voltage to charge the peripheral surface of the photosensitive drum 20 to a uniform potential. The exposure device 22 scans and exposes the peripheral surface of the photosensitive drum 20 with a laser beam to form an electrostatic latent image. The control unit 110 generates image data of a document based on image information read by the image reading device 11, expands the image data, and generates an image signal used for scanning exposure.

  The developing device 23 carries the developer on the developing sleeve 23a, which is a developer carrying member, and develops the electrostatic latent image on the photosensitive drum 20 into a toner image. The transfer roller 24 is applied with a transfer voltage, and transfers the toner image carried on the photosensitive drum 20 onto the sheet P fed by the sheet feeding unit 13 and passing through the transfer unit T. The fixing device 26 heats and presses the sheet P to which the toner image is transferred to fix the image on the sheet. The sheet P on which the image is fixed is discharged to a discharge tray 35 by a discharge roller 34. The drum cleaning device 25 collects residual toner by sliding the rotating brush against the photosensitive drum 20.

  The sheet feeding unit 13 conveys the sheet P stacked on the cassette 30 or the sheet P stacked on the manual feed tray 15 to the transfer unit T. The cassette 30 accommodates the sheet P. The pickup roller 31 takes out the sheets P stacked on the cassette 30. The separation unit 32 conveys the uppermost sheet P to the registration roller 33, and pushes back the multi-feed sheet overlapped with the uppermost sheet P to the cassette 30. The registration roller 33 feeds the sheet P to the transfer unit T in synchronization with the toner image on the photosensitive drum 20.

(Image reading device)
As shown in FIG. 1, an image reading device 11 that reads images of originals G and D is disposed on the upper part of the copying machine 10. In the image reading device 11, an automatic document feeder 14 is disposed on a platen glass 16. The automatic document feeder 14 can be rotated rearward to open the upper surface of the platen glass 16. The document pressing cover 17 presses the document G placed on the platen glass 16 so as to be in close contact with the platen glass 16. On the upper surface of the document pressing cover 17, a document discharge tray 52 on which documents to be discharged from the automatic document feeder 14 are stacked is disposed.

  The image reading unit 19 includes an image sensor that is formed long in the main scanning direction (a direction perpendicular to the paper surface) and an illumination element that is arranged along the image sensor. The image reading apparatus 11 can execute a fixed reading mode and a flow reading mode. In the fixed reading mode, the document G is placed on the platen glass 16 and is pressed against the platen glass 16 by the document pressing cover 17. The image reading unit 19 moves in the sub-scanning direction (arrow direction) under the platen glass 16 and reads the image on the lower surface of the document G.

  On the other hand, in the flow reading mode, the image reading unit 19 is positioned at a reading position set at a predetermined position in the sub-scanning direction. An automatic document feeder (ADF) 14 passes the document D, which is an example of a sheet stacked on the document supply tray 51, one by one above the stopped image reading unit 19. The image reading unit 19 continuously reads images on the lower surface of the moving document D.

(Automatic document feeder)
FIG. 2 is an explanatory diagram of the configuration of the automatic document feeder. FIG. 3 is an explanatory diagram of the rotation operation of the document supply tray. As shown in FIG. 2, an image reading apparatus 11 that is an example of a reading unit reads an image of a document D that is stacked on an automatic document feeder 14 that is an example of a sheet stacking apparatus. The image reading device 11 reads an image of a document conveyed by the automatic document conveying device 14. The document supply tray 51 can stack documents D. The conveyance unit 50, which is an example of a sheet conveyance unit, feeds the document D stacked on the document supply tray 51 and discharges it to the document discharge tray 52. The automatic document feeder 14 takes out the documents one by one from the document supply tray 51 and conveys them to the document discharge tray 52.

  The conveyance unit 50 conveys a document in the left-right direction perpendicular to the front-rear direction of the copier 10 shown in FIG. The transport unit 50 takes out the originals stacked on the original supply tray 51 one by one from the top, passes the originals above the image reading unit 19 stopped at the reading position, and discharges the originals to the original discharge tray 52. To load.

  The document supply tray 51 is gently inclined from the leading end side in the sheet conveyance direction toward the conveyance unit 50. As a result, the document placed on the document supply tray 51 slides down along the inclination of the document supply tray 51 and is easily delivered to the transport unit 50. The document discharge tray 52 is integrally formed on the upper surface of the document pressing cover 17 so as to be substantially parallel to the document supply tray 51 along the document transport direction. The transport unit 50 discharges the document in the direction opposite to the transport direction from the document supply tray 51 to the transport unit 50 and stacks the document on the document discharge tray 52.

  The pickup roller 2a descends and abuts on the uppermost document placed on the document supply tray 51 and rotates to feed the document to the nip portion between the transport roller 2b and the separation roller 2c. Since the conveyance roller 2b is rotationally driven in the conveyance direction, the conveyance roller 2b is brought into contact with the uppermost document and is sent to the registration roller 2d located on the downstream side. On the other hand, since the separation roller 2c is driven to rotate in the direction opposite to the conveying direction via a one-way clutch, when a document D that is overlapped with the uppermost document D is fed, a double-feed sheet is used. Push back to the document supply tray 51. The registration roller 2d corrects the skew of the document, and then transports the document and delivers it from the lead roller 2f to the lead roller 2g. The white roller (white roller) 2 e guides the document passing over the image reading unit 19 to the platen glass 16. The document whose image has been read passing between the white roller 2e and the platen glass 16 is transferred from the lead roller 2g to the discharge roller 2h and discharged to the document discharge tray 52.

  As shown in FIG. 3, the automatic document feeder 14 is mounted on the upper part of the copying machine 10. The automatic document feeder 14 takes the document loaded on the document supply tray 51 into the conveyance unit 50 and conveys it, and then ejects the document whose image has been read by the image reading device 11 from the conveyance unit 50. 52 is loaded.

  The automatic document feeder 14 can be largely rotated in the direction of the arrow F with respect to the image reading apparatus 11 and can maintain its posture in a substantially upright state. The image reading device 11 can open the document placement surface of the image reading device 11 by rotating the entire automatic document feeder 14 backward. The document supply tray 51 is rotatable in the direction of arrow E with respect to the transport unit 50. By widening the document supply tray 51 in the direction of arrow E to increase the distance between the document supply tray 51 and the document discharge tray 52, the documents stacked on the document discharge tray 52 can be easily taken out.

(Move the document supply tray)
FIG. 4 is an explanatory diagram of the normal state of the document supply tray. FIG. 5 is an explanatory view of the opened state of the document supply tray. As shown in FIG. 4, the document discharge tray 52, which is an example of a stacking unit, is rotatable and the document D is stacked. A document supply tray 51, which is an example of an opening / closing means, can open and close above the document discharge tray 52. The original document supply tray 51 in the normal state has a slope that gradually decreases toward the conveyance unit 50. In the normal state, the automatic document feeder 14 feeds the document from the document supply tray 51, and discharges and stacks the image-read document on the document discharge tray 52 disposed below the document supply tray 51.

  However, the automatic document feeder 14 in the normal state has a narrow interval between the stacking surface of the document discharge tray 52 and the bottom surface of the document supply tray 51, and it is difficult to take out the documents stacked on the document discharge tray 52 from the front side. Therefore, in order to easily take out the document D discharged to the document discharge tray 52, the document supply tray 51 can be moved upward with respect to the document discharge tray 52 and the transport unit 50 that houses the document D transport mechanism. Is provided. The document supply tray 51 can be opened when the document D loaded on the document discharge tray 52 is taken out. The document supply tray 51 and a cover that covers the transport mechanism of the transport unit 50 are rotatably engaged. The document supply tray 51 can be opened by rotating around the rotation center 51a and lifting it upward.

  As shown in FIG. 5, in the open state in which the document supply tray 51 is lifted upward, the space between the stack surface of the document discharge tray 52 and the bottom surface of the document supply tray 51 is wide, and the document discharge tray 52 is stacked on the document discharge tray 52. Easy to take out the document.

  Here, as shown in FIG. 3, when the automatic document feeder 14 is rotated in the direction of the arrow F, the document is received by the abutting surface 18a of the abutting portion 18 provided on the back side of the document discharge tray 52. The document on the discharge tray 52 is prevented from sliding backward.

  However, when the automatic document feeder 14 is further rotated to stand up, the document supply tray 51 that is rotatable with respect to the document discharge tray 52 rotates, so that the abutting portion 18 and the document supply tray 51 are rotated. The document may fall from the gap.

  Therefore, in the first embodiment, as shown in FIG. 5, the protruding portion 54 fixed to the document discharge tray 52 (abutting portion 18) and the abutting plate 53 fixed to the document supply tray 51 are overlapped. Thus, the gap between the abutting portion 18 and the document supply tray 51 is closed.

  The protruding portion 54 and the abutting plate 53, which are examples of shielding means, are provided on at least one of the document discharge tray 52 and the document supply tray 51. The projecting portion 54 and the abutting plate 53 are arranged so that the document discharge tray 52 generated between the document discharge tray 52 and the document supply tray 51 is interlocked with the opening of the document supply tray 51 above the document discharge tray 52. Close the open area facing downward when it rotates. As a result, even if the document supply tray 51 is rotated when the automatic document feeder 14 is rotated to stand, no gap is formed between the protruding portion 54 and the abutting plate 53.

(Abutting plate and protrusion)
FIG. 6 is a perspective view of the abutting plate and the protruding portion in a normal state. FIG. 7 is a perspective view of the abutting plate and the protruding portion in the open state. FIG. 8 is a perspective view of the abutting plate and the protruding portion when the automatic document feeder is turned upright.

  As shown in FIG. 6, the automatic document feeder 14 allows the document D stacked on the document supply tray 51 to be taken into the transport unit 50 and transported by the transport unit 50 in a normal state where the document supply tray 51 is at a low position. Then, the paper is discharged from the conveyance unit 50 to the document discharge tray 52. The side regulating plate 55 is movable in the arrow H direction with respect to the document supply tray 51. When the user sets a document on the document supply tray 51, the user manually operates the side regulating plate 55 to regulate both ends of the document in the width direction.

  The abutting plate 53 is provided from the document supply tray 51 toward the document discharge tray 52. The abutting plate 53 is provided on the bottom surface of the document supply tray 51 and overlaps the abutting portion 18 in the direction toward the rotation axis 61. For this reason, when the document supply tray 51 is moved away from the document discharge tray 52, a gap through which the document (D: FIG. 1) passes does not occur between the abutting plate 53 and the abutting portion 18.

  The abutting plate 53 is fixed to the lower surface of the document supply tray 51. The abutting plate 53 extends vertically from the lower surface of the document supply tray 51 downward. The abutting plate 53 is positioned on the side of the rotation axis 61 when the automatic document feeder 14 is rotated rearward to be in an upright state. As shown in FIG. 6, the abutting plate 53 is in a position where it does not interfere with the document discharge tray 52 in the normal state. For this reason, the abutting plate 53 does not hinder the rotation of the document supply tray 51.

  The protruding portion 54 is provided at the abutting portion 18 of the document discharge tray 52 and protrudes upward in a triangular wall shape. The protruding portion 54 extends upward from the abutting portion 18 of the document discharge tray 52. The protruding portion 54 forms a triangular abutting surface 54 a continuous with the abutting surface 18 a of the abutting portion 18. The protruding portion 54 is located closer to the rotation axis 61 than the conveyance path of the document discharged from the conveyance portion 50.

  Even if the abutting plate 53 is in an open state, the protruding portion 54 and the tip end portion overlap each other. Therefore, even if the document supply tray 51 is retracted to the maximum extent, the document (D: FIG. 1) does not slip through the abutting plate 53 and the protruding portion 54 and fall.

  As shown in FIG. 8, the user can bring the automatic document feeder 14 upright by lifting the front side of the automatic document feeder 14 and turning it in the direction of arrow F around the rotation axis 61. it can. At this time, the abutting portion 18 abuts on a document (D: FIG. 1) that travels along the document discharge tray 52 toward the back rotation axis 61. The abutting plate 53 and the projecting portion 54 are arranged so that the original (D: FIG. 5) moves toward the rotation axis 61 in the gap SM between the original supply tray 51 and the original discharge tray 52 formed by moving the original supply tray 51 away. Hit 1). Therefore, even when the document supply tray 51 rotates when the automatic document feeder 14 is raised, the document (D: FIG. 1) is received by the abutting plate 53 and the protruding portion 54 and does not fall.

(Effect of Embodiment 1)
In the first embodiment, when there is a document on the document discharge tray 52 or when the document is pulled out from the document discharge tray 52 by JAM processing or the like, the user holds the document supply tray 51 and largely retreats upward. At this time, since the abutting plate 53 is provided on the side opposite to the portion having the document supply tray 51, the abutting plate 53 does not interfere with the rotation operation of the document supply tray 51.

  In the first embodiment, the abutting plate 53 is disposed at a position where it does not interfere with the document discharge tray 52 in the normal state of the document supply tray 51, and the protruding portion 54 is located at a position overlapping the abutting plate 53 in the opened state of the document supply tray 51. Is arranged. For this reason, the configuration for receiving a document dropped from between the document supply tray 51 and the abutting portion 18 is simple.

  In the first embodiment, even if the document supply tray 51 rotates while the automatic document feeder 14 is tilted, the document discharged to the document discharge tray 52 is dropped by the abutting plate 53 and the protruding portion 54. Can be prevented.

  In the first embodiment, the protrusion 54 is fixed to the document discharge tray 52, and the abutting plate 53 is fixed to the document supply tray 51. Therefore, there are no parts to be attached / detached or parts to be stored, and there is no need to worry about losing such parts.

<Embodiment 2>
In the first embodiment, the abutting plate 53 is a single plate-like member. On the other hand, in the second embodiment, a plate-like expansion plate 56 is connected to the lower part of the abutting plate 53 so that it can be expanded downward and accommodated upward.

(Abutting plate and protrusion)
FIG. 9 is an explanatory view of the operation of the abutment plate 53 in the second embodiment. FIG. 10 is a perspective view of the abutting plate and the protruding portion when the automatic document feeder is in an upright state. In FIG. 9, (a) is a normal state, (b) is an open state. The second embodiment is configured the same as the first embodiment except that the configuration of the abutting plate 53 is different in the same copying machine 10 as the first embodiment. For this reason, in FIG. 9, FIG. 10, the same code | symbol as FIGS. 4-8 is attached | subjected to the structure which is common in Embodiment 1, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 9A, in the normal state, the extension plate 56 connected to the lower end portion of the abutting plate 53 is in a position where it abuts on the document discharge tray 52 and rises along the abutting plate 53. It overlaps the abutting plate 53.

  As shown in FIG. 9B, the extension plate 56, which is an example of a shielding unit, is provided on the document supply tray 51 and is urged by a compression coil spring 56b, which is an example of an urging unit. Projecting toward the discharge tray 52. When the document supply tray 51 is closed as shown in FIG. 9A, the extension plate 56 comes into contact with the document discharge tray 52 to resist the urging force of the compression coil spring 56b. 51.

  The expansion plate 56 can rotate in the vertical direction about the rotation shaft 56a. The expansion plate 56 is urged downward by a compression coil spring 56 b provided between the expansion plate 56 and the bottom surface of the document supply tray 51. For this reason, when the document supply tray 51 is lifted and moved from the normal state to the open state, the extension plate 56 is developed from the abutment plate 53 as the document supply tray 51 rotates, and the area of the abutment plate 53 is increased. Substantially expanded. The abutting plate 53 and the extension plate 56 increase an area in which the document supply tray 51 can abut against the document as the document supply tray 51 moves away.

  As shown in FIG. 10, when the user turns the automatic document feeder 14 to stand up, the document supply tray 51 may rotate unintentionally. There is a case where the document supply tray 51 is rotated and opened in a state where the automatic document feeder 14 is raised. At this time, the expansion plate 56 is unfolded from the abutting plate 53 and comes out. By expanding the expansion plate 56 provided on the abutting plate 53, the space between the abutting plate 53 and the protruding portion 54 is closed. Therefore, it is possible to prevent the document on the document discharge tray 52 from falling through the gap between the abutting plate 53 and the protruding portion 54. Even when the document supply tray 51 rotates too much and the abutting plate 53 and the projecting portion 54 do not overlap, the document can be received by the extended plate 56 that is developed.

<Other embodiments>
FIG. 11 is an explanatory diagram of an example of another embodiment. In FIG. 11, (a) is an insertion method and (b) is a bellows method.

  As shown in FIG. 11A, the automatic document feeder 14 is installed on the upper surface of the image reading device 11 so as to be able to rotate backward about the rotation axis 61. A pin 53E is fixed to the lower surface of the document supply tray 51, and a hole 53h into which the pin 53E can be inserted and removed is formed in the document discharge tray 52. A pin 53E, which is an example of shielding means, is provided from the document supply tray 51 toward the document discharge tray 52. When the document supply tray 51 is closed, the pin 53E is inserted into a hole 53h, which is an example of a recess of the document discharge tray 52. Stored.

  In the automatic document feeder 14, a gap SM is formed between the document supply tray 51 and the document discharge tray 52 when the document supply tray 51 is lifted to the position indicated by the alternate long and short dash line. However, the gap SM is closed by overlapping the abutment surface 18a of the abutment portion 18 and the pin 53E.

  As shown in FIG. 11B, a bellows wall 53 </ b> F is provided in which the document supply tray 51 and the document discharge tray 52 are connected and folded. A gap SM is formed between the document supply tray 51 and the document discharge tray 52 when the document supply tray 51 is lifted to the position of the dashed line. However, the gap SM is closed by the folded bellows wall 53F.

  The sheet stacking apparatus of the present invention is not limited to the specific configuration and control described in the first and second embodiments.

  In the first and second embodiments, the examples of the sheet stacking apparatus mounted on the copying machine have been described. However, the apparatus equipped with the sheet stacking apparatus is not limited to the copying machine. It may be an image forming apparatus such as an ink jet printer, an electrophotographic printer, a facsimile machine, or a multifunction machine.

  In the first and second embodiments, the embodiment in which the document read by the image reading apparatus is stacked has been described. However, the stacked sheet is not limited to the document from which the image has been read. It may be an original from which an image is read by the image reading apparatus, an unused recording material sheet used for printing, a sheet used for sheet processing such as punching and needle binding.

  In the first and second embodiments, as shown in FIG. 8, the abutting plate 53 provided on the document supply tray 51 and the projecting portion 54 provided on the document discharge tray 52 are overlapped to allow the document to pass through the gap SM. Prevented falling. However, the document may be prevented from dropping through the gap SM only by the abutting means provided on the document supply tray 51 and only by the abutting means provided on the document discharge tray 52.

10: copier (image forming apparatus), 11: image reading apparatus (reading means), 12: image forming section (image forming means), 14: automatic document feeder (sheet stacking apparatus), 18: abutting section, 18a : Abutting surface, 19: Image reading unit, 26: Fixing device (image forming means), 50: Conveying section (conveying means), 51: Document supply tray (opening / closing means), 52: Document discharge tray (stacking means), 53 : Abutting plate (shielding means), 53E: pin (shielding means), 53h: hole (concave portion), 54: protrusion (shielding means), 54a: abutting surface, 55: side regulating plate, 56: expansion plate (shielding) Means), 56a: rotating shaft, 56b: compression coil spring (biasing means), 56c: guide groove, 61: rotating axis, D: document (sheet), P: sheet (recording medium), SM: gap

Claims (7)

A rotatable stacking means for stacking sheets;
Opening and closing means capable of opening and closing above the loading means;
At least one of the loading means and the opening / closing means, the loading means, which is generated between the loading means and the opening / closing means, is rotated in conjunction with the opening / closing means opening the upper portion of the loading means. Shielding means for closing the open area facing downwards,
A sheet stacking apparatus characterized by that. The opening / closing means can be opened when taking out the sheets stacked on the stacking means.
The sheet stacking apparatus according to claim 1, wherein: The shielding means is provided from the opening / closing means toward the loading means,
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The shielding means is provided on the opening / closing means and protrudes toward the stacking means by being biased by the biasing means, and contacts the loading means when the opening / closing means is closed. Thus, it is stored in the opening / closing means against the urging force of the urging means,
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The shielding means is provided from the opening / closing means toward the stacking means, and when the opening / closing means is closed, is stored in a recess of the loading means.
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The opening / closing means is capable of stacking sheets, and further comprises a sheet conveying means for feeding the sheets stacked on the opening / closing means and discharging them to the stacking means,
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The sheet stacking apparatus according to any one of claims 1 to 6,
Reading means for reading an image of a sheet stacked on the sheet stacking device;
Image forming means for forming an image on a recording medium based on the image read by the reading means,
An image forming apparatus.

Images