JP2017048009A - Sheet loading device and image formation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet loading device which enables a user to draw loading means securely while achieving strength in a guide part, and to provide an image formation device.SOLUTION: A sheet loading device includes: a cassette (loading means) which is loaded with sheets and supported so as to be drawn relative to a device body; a pair of upper cassettes (guide parts) which are formed as part of a frame body 201F of the device body and guide the cassette in a drawing direction; and a stopper 4 (a restriction member) which is formed separately from the upper casette rail and fixed to the frame body 201F. The stopper 4 has: an engagement surface 4a (a contact part) which contacts with a projection part of the cassette; and a butted part 60 which is disposed forming a gap with the upper cassette rail or the frame body 201F.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sheet stacking apparatus that stacks sheets and an image forming apparatus including the sheet stacking apparatus.

  2. Description of the Related Art Conventionally, a cassette apparatus for an electrophotographic copying machine has been proposed in which a protrusion formed on the upper surface of a cassette that can be inserted and removed is engaged with a stopper protruding downward from the upper guide surface of a guide rail to regulate the amount of drawer of the cassette. (See Patent Document 1).

JP-A-5-735

  In recent years, as an image forming apparatus such as an electrophotographic copying machine is reduced in weight and cost, the guide rail is sometimes formed with an increased thickness in order to use it as a strength member. However, when the plate thickness of the guide rail is increased, it may be difficult to integrally process the stopper on the guide rail.

  Accordingly, the present invention provides a sheet stacking apparatus and an image in which a restricting member (stopper) is formed separately from the guide section while giving strength to the guide section (guide rail), and the stacking means (cassette) can be reliably pulled out. An object is to provide a forming apparatus.

  In the sheet stacking apparatus, the sheet stacking apparatus is configured to stack a sheet and is supported so as to be able to be pulled out with respect to the apparatus main body, and a pair of guides formed in a frame of the apparatus main body and guiding the stacking unit in the pulling direction. The guide unit and the guide unit are configured separately from each other and include a restricting member fixed to the frame body. The stacking unit has a protrusion that protrudes in a direction intersecting the pull-out direction. The restricting member is disposed in contact with the protrusion, and a contact portion that restricts a moving range of the stacking unit in the pull-out direction, and a gap with respect to the guide portion or the frame body. And an abutting portion.

  According to the present invention, since the regulating member is configured separately from the guide portion, the degree of freedom in design can be improved, for example, by increasing the thickness of the guide portion. Further, since the abutting portion of the restricting member is disposed with a gap with respect to the guide portion or the frame, it can be assembled with high accuracy without interfering with the guide portion or the frame when the restricting member is assembled. . Thereby, the stacking means can be pulled out smoothly.

1 is an overall schematic diagram illustrating a printer according to a first embodiment. The perspective view which shows the frame of a printer. The perspective view which shows an upper cassette rail. The side view which shows the engagement state of a cassette and a stopper. A stopper is shown, (a) is a top view, (b) is a side view, (c) is a front view. The perspective view which shows the stopper which concerns on 2nd Embodiment. The perspective view which shows the stopper which concerns on 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, it is assumed that the positional relationship between the top, bottom, left, right, and front side is expressed with reference to the state (view point in FIG. 1) of the image forming apparatus viewed from the front.

<First Embodiment>
[Image forming apparatus]
A printer 201 (image forming apparatus) according to the first embodiment is an electrophotographic full-color laser beam printer. As shown in FIG. 1, the printer 201 includes a printer main body 201A that is an apparatus main body, and a reading device 202 that is provided above the printer main body 201A and reads image data of a document.

  The printer main body 201A includes an image forming unit 201B that forms an image on the sheet P, a fixing unit 220 that fixes the image on the sheet P, and the like. A discharge space for discharging the sheets P is formed between the reading device 202 and the printer main body 201A. A discharge tray 230 on which the discharged sheets P are stacked is provided in the discharge space. The printer main body 201A is provided with a sheet feeding unit 201E that feeds the sheet P to the image forming unit 201B. The sheet feeding unit 201E includes cassette feeding devices 1 and 30 disposed at the lower portion of the printer main body 201A, and a manual feeding device 100M disposed at the right side of the printer main body 201A.

  An image forming unit 201B as an image forming unit is a so-called four-drum full-color image forming unit including a laser scanner 210, four process cartridges 211, and an intermediate transfer unit 201C. These process cartridges form toner images of respective colors of yellow (Y), magenta (M), cyan (C), and black (K). Each process cartridge 211 includes a photosensitive drum 212, a charger 213, a developing device 214, a cleaner (not shown), and the like. Above the image forming unit 201B, a toner cartridge 215 containing toner of each color is detachably attached to the printer main body 201A.

  The intermediate transfer unit 201 </ b> C includes an intermediate transfer belt 216 that is wound around a driving roller 216 a and a tension roller 216 b, and the intermediate transfer belt 216 is disposed above the four process cartridges 211. The intermediate transfer belt 216 is disposed so as to be in contact with the photosensitive drum 212 of each process cartridge 211, and is rotated counterclockwise (in the direction of the arrow Q) by a driving roller 216a driven by a driving unit (not shown). Driven. The intermediate transfer unit 201 </ b> C includes a primary transfer roller 219 that contacts the inner peripheral surface of the intermediate transfer belt 216 at a position facing each photosensitive drum 212, and a nip portion between the intermediate transfer belt 216 and the photosensitive drum 212. A primary transfer portion T1 is formed. Further, the image forming unit 201B includes a secondary transfer roller 217 that contacts the outer peripheral surface of the intermediate transfer belt 216 at a position facing the driving roller 216a. As a nip portion between the secondary transfer roller 217 and the intermediate transfer belt 216, a secondary transfer portion T2 to which the toner image carried on the intermediate transfer belt 216 is transferred to the sheet P is formed.

  In each process cartridge 211 configured as described above, an electrostatic latent image is drawn on the surface of the photosensitive drum 212 by the laser scanner 210, and then toner is supplied from the developing device 214 to make it negative. A charged toner image of each color is formed. These toner images are subjected to multiple transfer (primary transfer) sequentially to the intermediate transfer belt 216 at each primary transfer portion T1 by applying a positive transfer bias voltage to the primary transfer roller 219, and intermediate A full color toner image is formed on the transfer belt 216.

  In parallel with such a toner image forming process, the sheet P fed from the sheet feeding unit 201E is transported toward the registration roller pair 240, and skew correction is performed by the registration roller pair 240. The registration roller pair 240 conveys the sheet P to the secondary transfer portion T2 at a timing that matches the transfer timing of the full-color toner image formed on the intermediate transfer belt 216. The toner image carried on the intermediate transfer belt 216 is secondarily transferred onto the sheet P at the secondary transfer portion T2 by applying a positive transfer bias voltage to the secondary transfer roller 217.

  The sheet P to which the toner image has been transferred is heated and pressurized in the fixing unit 220, and the color image is fixed to the sheet P. The sheet P on which the image is fixed is discharged to the discharge tray 230 by the discharge roller pair 225 and stacked. When images are formed on both sides of the sheet P, the sheet P passes through the fixing unit 220 and is then switched back by a reversing roller pair 222 that can be rotated in the normal direction. Then, the sheet P is conveyed again to the image forming unit 201B via the reconveying path R, and an image is formed on the back surface.

[Configuration of frame and cassette]
As shown in FIG. 2, the printer main body 201 </ b> A has a frame body 201 </ b> F which is a strength member. And a side plate 13 connecting the left front column 11 and the back plate 12. The frame body 201F includes beam members 14 and 15 that connect the left front column 11 and the right front column 5. Further, the frame body 201F includes a pair of upper cassette rails 3L and 3R (guide portions) and lower cassette rails 32L and 32R that connect the left front column 11 and the right front column 5 and the back plate 12, respectively. Yes. The upper cassette rail 3R is coupled to the right front column 5 by welding via a rail mounting plate 6 (intermediate member).

  The cassette feeding device 1 (sheet stacking device) is supported by the upper cassette rails 3L and 3R, and operates the handle 2a to guide the cassette 2 guided so as to be drawn in the drawing direction (arrow A direction, front side). The sheet P is stacked on the cassette 2. Similarly, the cassette feeding device 30 includes a cassette 31 that is supported by the lower cassette rails 32L and 32R and is guided so as to be pulled out in the pulling direction (front direction) by operating the handle 31a. Sheets P are stacked on the cassette 31. The upper cassette rails 3L and 3R and the lower cassette rails 32L and 32R described above constitute a part of the cassette feeding device 1.

  Since the cassette 2 and the cassette 31 differ only in the size of the stacked sheets, the cassette 2 and the upper cassette rails 3L and 3R will be described below, and the cassette 31 and the lower cassette rails 32L and 32R will be described. Omitted.

  As shown in FIG. 3, the upper cassette rail 3 </ b> R has a side wall 3 c (first surface) extending in a vertical direction (orthogonal direction) orthogonal to the drawing direction. Further, the upper cassette rail 3R has an upper surface 3a (second surface) and a lower surface 3b (third surface) extending in parallel with the drawing direction from one end and the other end of the side wall 3c in the vertical direction. The upper cassette rail 3R is thus formed by a sheet metal having a U-shaped cross section, and supports the side walls 2b and 2c of the cassette 2 so as to be slidable together with the upper cassette rail 3L similarly formed in a U-shaped cross section. To do. A hole 50 is formed in the side wall 3c of the upper cassette rail 3R, and a part of a stopper 4 (regulation member) described later protrudes from the hole 50.

  The frame body 201F of the present embodiment has no planar bottom plate at the bottom, thereby reducing the weight and cost of the printer 201. In this configuration, in order to ensure the rigidity required for the frame body 201F, the cassette rails 3L, 3R disposed over the front of the frame body 201F are made thicker, and the cassette rail 3L. It is necessary to increase the rigidity of 3R itself. The cassette rails 3L and 3R of the present embodiment are made of a sheet metal material having a sheet thickness of about 2 mm.

  As shown in FIG. 4, the cassette 2 has a protrusion 2 d (protrusion part) formed on the upper side wall 2 b on the right side. By pulling out the cassette 2, the protrusion 2 d becomes the engagement surface 4 a ( The drawer amount (movement range) of the cassette 2 is regulated. This pull-out amount is set so that the user can easily replenish and replace the maximum size sheet P that can be stacked in the cassette 2. The cassette 2 in the pulled-out state hangs downward on its front side due to its own weight. As a result, the amount of engagement between the protrusion 2d of the cassette 2 and the engagement surface 4a of the stopper 4 is further increased, and the cassette 2 can be reliably prevented from dropping off from the upper cassette rails 3L and 3R. The protrusion 2d is formed so as to protrude in the vertical direction orthogonal to the drawing direction. However, the protrusion 2d is not limited thereto, and may be formed so as to protrude in a direction intersecting with the drawing direction.

  When removing the cassette 2 from the printer 201, as shown by a broken line in FIG. 4, the user tilts the cassette 2 largely upward against its own weight. For example, a recess 3f is formed on the lower surface of the cassette rails 3L and 3R, and the cassette 2 can be tilted upward. Then, by tilting the near side of the cassette 2 upward, the engagement between the projection 2d and the engagement surface 4a of the stopper 4 is released, and the cassette 2 can be easily removed in the pull-out direction (arrow A direction).

[Stopper configuration]
As described above, the upper cassette rail 3R of the present embodiment has a plate thickness of about 2 mm to ensure the rigidity of the frame 201F, and the stopper of the cassette 2 can be formed integrally with the upper cassette rail 3R. Have difficulty. Therefore, in the present embodiment, the stopper 4 is formed of a sheet metal material having a thickness of about 1.2 mm, which is a separate member from the upper cassette rail 3R and is thinner than the upper cassette rail 3R.

  Although it is desirable from the viewpoint of strength that the stopper 4 can be directly fixed to the upper surface 3a of the upper cassette rail 3R, if the fixing screw 7 protrudes into the slide region of the cassette 2, the cassette 2 cannot be inserted or removed. Therefore, as shown in FIG. 3, the stopper 4 is fixed to the rail mounting plate 6 different from the upper cassette rail 3R with a screw 7, and is engaged through a hole 50 formed in the cassette rail 3R. The surface 4 a is configured to protrude into the slide area of the cassette 2.

  As shown in FIG. 5, the stopper 4 includes a mounting portion 41 that extends in the vertical direction and has a fixing portion 4 b to which the screw 7 is fixed, a vertical portion 42 that is bent from the mounting portion 41 and extends rearward, and a vertical portion. And a horizontal portion 43 that is bent from the lower portion of 42 and extends in the horizontal direction. An engaging surface 4a is formed at the rear end of the horizontal portion 43 to engage the projection 2d of the cassette 2.

  The upper surface of the horizontal portion 43 constitutes a first abutting surface 4c (abutting surface), and the first abutting surface 4c extends in the pull-out direction and forms a predetermined gap with respect to the upper surface 3a of the upper cassette rail 3R. Are located opposite each other. The tip of the left side surface of the vertical portion 42 constitutes a second abutting surface 4 d (orthogonal abutting surface), and the second abutting surface 4 d extends in the vertical direction and has a predetermined gap with respect to the rail mounting plate 6. Are placed opposite each other. The first butting surface 4c and the second butting surface 4d constitute the butting portion 60.

  The gap in the first butting surface 4c and the second butting surface 4d causes the stopper 4 to interfere with the rail mounting plate 6 and the hole 50 of the upper cassette rail 3R even when the dimensional accuracy of parts varies. It is sufficient if it is more than the amount that can be assembled without. In the present embodiment, the gap amount in the first abutting surface 4c is set to 0.3 mm, and the gap amount in the second abutting surface 4d is set to 0.5 mm. These gap amounts are the plate thickness of the stopper 4. Or less (about 1.2 mm or less). Thereby, even when the dimensional accuracy of the components varies and the gap between the stopper 4 and the upper cassette rail 3R or the rail mounting plate 6 is reduced to the minimum, a gap amount necessary for assembly can be secured.

[Stopper action]
The stopper 4 receives the impact load F shown in FIG. 5 on the engagement surface 4a when the projection 2d collides when the cassette 2 is pulled out by the user. The engagement surface 4a is disposed at a position away from the fixing portion 4b where the stopper 4 is attached to the rail attachment plate 6 by the screw 7. Therefore, the stopper 4 that has received the impact load F tends to deform in the direction of arrow C shown in FIG. 5A and the direction of arrow B shown in FIG.

  As shown by the broken line in FIG. 5, if the stopper 4 may be plastically deformed in the direction of arrow B and the shape does not return, the protrusion 2 d and the stopper 4 cannot be disengaged even if the cassette 2 is tilted. The cassette 2 cannot be removed. Further, if the stopper 4 is plastically deformed in the direction of the arrow C and the shape does not return, the side wall 2b of the cassette 2 and the stopper 4 rub against each other when the cassette 2 is inserted and removed, and the operating force increases. End up.

  In the present embodiment, since the first abutting surface 4c and the second abutting surface 4d are formed on the stopper 4, the deformation amount of the stopper 4 is restricted. That is, when an impact load F having a predetermined pressure or more is applied to the engaging surface 4a of the stopper 4, the first abutting surface 4c abuts against the upper surface 3a of the upper cassette rail 3R, and the second abutting surface 4d is a frame body. It abuts against the rail mounting plate 6 constituting a part of 201F. Thereby, the impact load F is transmitted to the upper cassette rail 3R and the rail mounting plate 6 which are thicker and thicker than the stopper 4, and the amount of deformation of the stopper 4 is restricted.

  Therefore, even if the stopper 4 is made of a thin sheet metal material separate from the upper cassette rail 3R, the stopper 4 is not plastically deformed and the operability of the cassette 2 is not impaired. Further, for example, the degree of freedom in design can be improved by increasing the thickness of the upper cassette rail 3R. Furthermore, since the abutting portion 60 of the stopper 4 is disposed with a gap with respect to the upper cassette rail 3R and the frame 201F, when the stopper 4 is assembled, it does not interfere with the upper cassette rail 3R and the frame 201F. Can be assembled accurately.

  In the present embodiment, the gap amount at the first abutting surface 4c is set to 0.3 mm, and the gap amount at the second abutting surface 4d is set to 0.5 mm. It may be set freely as long as it does not deform.

  In the present embodiment, the protrusion 2d is formed on the right side wall 2b of the cassette 2 and one stopper 4 is provided on the upper cassette rail 3R side. However, the present invention is not limited to this. That is, a protrusion may be formed on the left side wall 2c of the cassette 2, and a stopper may be provided on the upper cassette rail 3L side, or a stopper may be provided on both the left and right upper cassette rails 3L and 3R.

  In the present embodiment, the first abutting surface 4c and the second abutting surface 4d are formed on the stopper 4 as the abutting portion 60. However, any of the first abutting surface 4c and the second abutting surface 4d is used. Only one of them may be formed on the stopper 4.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. The second embodiment is configured by changing the abutting portion 60 of the first embodiment. About the structure similar to a form, illustration is abbreviate | omitted or attaches | subjects the same code | symbol to a figure and demonstrates.

  As shown in FIG. 6, the stopper 4 </ b> A (regulating member) has a horizontal portion 43 </ b> A that extends in the horizontal direction and is formed with an engagement surface 4 a. The horizontal portion 43A has a first abutting surface 4c (abutting surface) and a third abutting surface 4e (drawing abutting surface) that constitute the upper surface. The first butting surface 4c and the third butting surface 4e constitute the butting portion 70.

  The third abutting surface 4e extends in the drawing direction, and is disposed between the upper surface 3a and the lower surface 3b of the upper cassette rail 3R so as to face the side wall 3c with a predetermined gap. In the present embodiment, the predetermined gap is set to about 0.5 mm.

  In the present embodiment, since the first butting surface 4c and the third butting surface 4e are formed on the stopper 4A, the deformation amount of the stopper 4A is restricted. That is, when an impact load F having a predetermined pressure or more is applied to the engaging surface 4a of the stopper 4A, the first abutting surface 4c abuts the upper surface 3a of the upper cassette rail 3R, and the third abutting surface 4e is the upper cassette. It strikes against the side wall 3c of the rail 3R.

  Thereby, the impact load F is transmitted to the upper cassette rail 3R which is thicker and thicker than the stopper 4A, and the deformation amount of the stopper 4A is regulated. Therefore, even if the stopper 4A is made of a thin sheet metal material separate from the upper cassette rail 3R, the stopper 4A is not plastically deformed and the operability of the cassette 2 is not impaired.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. The third embodiment is configured by changing the abutting portions 60 and 70 of the first and second embodiments. About the structure similar to 1st Embodiment, illustration is abbreviate | omitted or attaches | subjects the same code | symbol to a figure and demonstrates.

  As shown in FIG. 7, the stopper 4 </ b> B (regulating member) has a horizontal portion 43 </ b> B that extends in the horizontal direction and in which an engagement surface 4 a is formed. The horizontal portion 43B has a first abutting surface 4c (abutting surface) and a fourth abutting surface 4f (width abutting surface) that constitute the upper surface. The first butting surface 4c and the fourth butting surface 4f constitute the butting portion 80.

  The fourth abutting surface 4f extends in the width direction perpendicular to the pull-out direction and the vertical direction, and is arranged to face the end surface 50a on the near side of the hole 50 formed in the upper cassette rail 3R with a predetermined gap. Has been. In the present embodiment, the predetermined gap is set to about 0.5 mm.

  In the present embodiment, since the first butting surface 4c and the fourth butting surface 4f are formed on the stopper 4B, the deformation amount of the stopper 4B is restricted. That is, when an impact load F having a predetermined pressure or more is applied to the engaging surface 4a of the stopper 4B, the first abutting surface 4c abuts against the upper surface 3a of the upper cassette rail 3R, and the fourth abutting surface 4f is a hole. 50 hits the end face 50a.

  Thereby, the impact load F is transmitted to the upper cassette rail 3R which is thicker and thicker than the stopper 4B, and the deformation amount of the stopper 4A is restricted. Therefore, even if the stopper 4B is made of a thin sheet metal material separate from the upper cassette rail 3R, the stopper 4B is not plastically deformed and the operability of the cassette 2 is not impaired.

  The stopper configured separately from the upper cassette rail 3R may be formed with all of the first to fourth abutting surfaces 4c to 4e described in the first to third embodiments described above, You may form combining these 1st-4th abutting surfaces 4c-4e suitably.

  2: Loading means (cassette) / 2d: Projection (projection) / 3a: Second surface (upper surface) / 3b: Third surface (lower surface) / 3c: First surface (side wall) / 3L, 3R: Guide portion ( Upper cassette rail) / 4, 4A, 4B: restriction member (stopper) / 4a: abutting portion (engaging surface) / 4c: abutting surface (first abutting surface) / 4d: orthogonal abutting surface (second Abutting surface) / 4e: Drawer abutting surface (third abutting surface) / 4f: Width abutting surface (fourth abutting surface) / 5: Frame body (right front strut) / 6: Intermediate member (rail mounting) Plate) / 50: hole / 50a: end face / 60, 70, 80: abutting part / 201: image forming apparatus (printer) / 201B: image forming means (image forming part) / 201F: frame

Claims (15)

A stacking means that stacks sheets and is supported so as to be able to be pulled out with respect to the apparatus main body;
A pair of guide portions that are formed as part of the frame of the apparatus main body and guide the stacking means in the pull-out direction;
The guide member is configured separately from the guide part, and includes a regulating member fixed to the frame body,
The stacking means has a protruding portion that protrudes in a direction intersecting the pull-out direction,
The restricting member abuts against the protrusion, and abutment that restricts a range of movement of the stacking means in the pull-out direction and an abutment disposed with a gap with respect to the guide part or the frame body And having a part,
A sheet stacking apparatus characterized by that. The abutting portion, when the protrusion comes into contact with the contact portion with a predetermined pressure or more, the regulating member is deformed and hits the guide portion.
The sheet stacking apparatus according to claim 1, wherein: The guide portion includes a first surface extending in an orthogonal direction orthogonal to the pull-out direction, a second surface extending in parallel to the pull-out direction from one end of the first surface in the orthogonal direction, and the first surface in the orthogonal direction. A third surface extending in parallel with the pull-out direction from the other end of the one surface,
The abutting portion has an abutting surface that extends in the pull-out direction and is disposed to face the second surface with a predetermined gap.
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The abutting surface, when the protrusion comes into contact with the contact portion with a predetermined pressure or more, the regulating member is deformed and hits the second surface.
The sheet stacking apparatus according to claim 3. The abutting portion has an orthogonal abutting surface that extends in the orthogonal direction and is disposed to face the frame body with the gap therebetween.
The sheet stacking apparatus according to claim 3 or 4, wherein the sheet stacking apparatus is configured as described above. When the protrusion comes into contact with the contact portion with a pressure greater than or equal to a predetermined pressure, the orthogonal abutment surface is deformed and abuts against the frame.
The sheet stacking apparatus according to claim 5, wherein: The abutting portion has a drawer abutting surface that extends in the withdrawal direction and is disposed to face the first surface and the gap between the second surface and the third surface.
The sheet stacking apparatus according to claim 3, wherein the sheet stacking apparatus is a sheet stacking apparatus. When the protrusion comes into contact with the contact portion with a pressure greater than or equal to a predetermined pressure, the pull-out abutting surface deforms the regulating member and hits the first surface.
The sheet stacking apparatus according to claim 7. The second surface has a hole portion from which at least a part of the regulating member including the contact portion protrudes,
The abutting portion has a width abutting surface that extends in the width direction perpendicular to the pull-out direction and the orthogonal direction, and is disposed to face the end surface of the hole portion with the gap therebetween.
The sheet stacking apparatus according to claim 3, wherein the sheet stacking apparatus is a sheet stacking apparatus. The width abutting surface, when the protrusion comes into contact with the contact portion with a predetermined pressure or more, the regulating member is deformed and hits the end surface of the hole portion.
The sheet stacking apparatus according to claim 9. The restriction member and the guide portion are made of sheet metal material,
The plate thickness of the regulating member is thinner than the plate thickness of the guide portion,
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The gap is not more than the plate thickness of the regulating member,
The sheet stacking apparatus according to claim 11. The protrusion is formed on the top of the loading means.
The sheet stacking apparatus according to claim 1, wherein the sheet stacking apparatus is a sheet stacking apparatus. The frame includes a frame body, and an intermediate member disposed between the frame body, the guide portion, and the restriction member.
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 14,
Image forming means for forming an image on a sheet fed from the sheet stacking device,
An image forming apparatus.

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