JP2017171490A - Sheet storage device and image formation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet storage device capable of regulating a sheet at a desired loading position more reliably.SOLUTION: A regulation part 32 movable relative to a loading part 30 so as to change a regulation position according to the size of a sheet loaded on the loading part 30 comprises: a regulation part body having a regulation surface 32a in contact with a sheet end and configured to be movable relative to the loading part 30; a stopper provided in the regulation part body so as to take an engagement state of engaging with either one of a plurality of engaged parts 39a arranged in the loading part 30 according to the sheet size and a non-engagement state of not engaging with an engaged part 39; and a pressing part P provided in the regulation body, which is located at a non-pressing position retracted from the regulation surface 32a when the stopper is in the non-engagement state, and moves from the non-pressing position toward a pressing position projecting from the regulation surface 32a to press the sheet end, by receiving an urging force.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sheet storage device of an image forming apparatus, and more particularly to a configuration for positioning a regulating member that regulates the position of a sheet.

  2. Description of the Related Art Image forming apparatuses such as printers and copiers that are widely used today are configured to feed a sheet that is an image forming target toward an image forming unit. As a general configuration, a sheet is stored in a paper feed cassette as a sheet storage device configured to be detachable from the image forming apparatus main body, and is automatically fed from the paper feed cassette to the image forming unit by the sheet feeding device. Is done. As a sheet feeding cassette used in such an image forming apparatus, there is a universal cassette that can store sheets of various sizes in the same cassette. A rear end regulating member that regulates the rear end of the sheet accommodated in the sheet accommodating portion in the sheet feeding direction is movably provided in the sheet accommodating portion of the universal cassette. Further, a side end regulating member that regulates the side end of the sheet in the width direction orthogonal to the sheet feeding direction is movably provided. Therefore, sheets of different sizes can be accommodated by moving the trailing edge regulating member and the side edge regulating member in accordance with the trailing edge and the side edge of the sheet to be accommodated. In such a universal cassette, the side edge of the sheet is regulated by the side edge regulating member, and the trailing edge is regulated by the trailing edge regulating member, so that the leading edge position of the sheet is always positioned at a predetermined position. As a result, the sheet can be stably fed regardless of the sheet size.

  By the way, when the universal cassette is attached to or detached from the image forming apparatus main body, these restricting members may move from the normal sheet restricting position due to the inertial force or impact of the sheet generated by the attaching / detaching operation. If the restricting member moves and the position where the sheet is restricted is shifted, the sheet cannot be held in the proper position, and problems such as sheet feeding failure, skew feeding, and double feeding occur during feeding operation. Let

  Therefore, for example, there is a universal cassette in which, for example, a rack is provided on the cassette body, a stopper is provided on the restriction member, and the restriction member is fixed by locking the stopper to the rack. In this universal cassette, the fixing of the restriction member is released by releasing the engagement of the stopper with a release lever that is arranged to protrude from the outer wall of the restriction member (see Patent Document 1). According to this conventional universal cassette, fixing the regulating member with the rack and the stopper is effective against a collision when the cassette is attached and detached, an impact at the time of physical distribution, and the like. Further, since the release lever for releasing the engagement of the stopper is arranged so as to protrude from the outer wall of the restricting member, the position of the restricting member can be adjusted even when sheets are stacked on the cassette, so that the operability is good. On the other hand, there has also been proposed a spring member that further biases the sheet toward the reference side on the regulating member (see Patent Document 2). In this configuration, the sheet is pressed against the reference surface side by the spring member without a gap, and the position of the side edge of the sheet can be stably regulated.

JP 2001-88948 A Japanese Patent Laid-Open No. 9-183522

As a new sheet storage device, for example, it is conceivable to adopt a configuration in which the above two conventional examples are combined. However, it has been found that a simple combination causes a new problem. In general, when a user puts a sheet into a cassette, in order to improve the insertability of the sheet, the user inserts the sheet into the cassette after releasing the regulating member once to the outside. Thereafter, while pressing the release lever of the restricting member, the end of the restricting member is abutted against the end of the paper to fix the position. A problem occurs at this time. That is, since the restricting member has moved to a position where it abuts against the end of the paper, the reaction force of the biasing pressure of the spring member that biases the sheet toward the reference side is applied to the restricting member. When trying to fix the position of the regulating member, the user gradually removes the force from the release lever, but when the magnitude relationship between the reaction force of the biasing pressure and the pushing force of the user is reversed, the regulating member May move slightly in the opposite direction. If the restricting member moves slightly when the position of the restricting member is fixed in this way, a gap is generated between the sheet and the restricting member, or the biasing pressure is weakened, and the restricting position of the sheet is not stable.

  An object of the present invention is to provide a sheet storage device that can more reliably regulate sheets at a desired stacking position.

In order to achieve the above object, the sheet storage device of the present invention includes:
A stacking unit on which sheets are stacked;
A regulation unit that regulates the stacking position of sheets, and a regulation unit that is movable with respect to the stacking unit so that the regulation position can be changed according to the size of the sheets stacked on the stacking unit;
In a sheet storage device comprising:
The regulation part is
A restricting portion main body having a restricting surface in contact with the sheet end portion and configured to be movable with respect to the stacking portion;
The engagement state that engages with any of the plurality of engaged portions arranged in the stacking portion according to the sheet size and the non-engagement state that does not engage with the engaged portion can be taken. A stopper provided on the restriction body,
When the stopper is in the non-engaged state, the stopper is in a non-pressing position retracted from the restriction surface. When the stopper is in the engaged state, the stopper protrudes from the non-pressing position than the restriction surface. Toward the pressing position for pressing the part, receiving the urging force and moving, and a pressing part provided in the regulating part main body,
It is characterized by providing.
In order to achieve the above object, an image forming apparatus of the present invention includes:
An image forming apparatus for forming an image on a sheet,
The sheet storage device is provided.

  According to the present invention, sheets can be more reliably regulated at a desired stacking position.

The perspective view of the universal cassette which concerns on the Example of this invention 1 is a schematic cross-sectional view of an image forming apparatus main body according to an embodiment of the present invention. The universal cassette top view which concerns on the Example of this invention The perspective view of the adjustment side edge part regulating member in the Example of this invention Operational diagram of adjusting side end regulating member in an embodiment of the present invention The operation | movement figure of the adjustment side edge part regulating member back surface in the Example of this invention

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be exemplarily described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the invention is applied and various conditions. That is, it is not intended to limit the scope of the present invention to the following embodiments.

[Example 1]
An image forming apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view showing a schematic configuration of the image forming apparatus 1 according to the embodiment of the present invention. An image forming apparatus 1 according to this embodiment is an electrophotographic laser beam printer 1. The image forming apparatus 1 according to the present embodiment is configured such that a universal cassette 3 (hereinafter referred to as a cassette 3) as a sheet storage device according to the present embodiment is detachably attached to the apparatus main body. Here, the apparatus main body refers to an apparatus configuration portion obtained by removing at least the cassette 3 from the configuration of the image forming apparatus 1.

  The image forming apparatus 1 according to the present exemplary embodiment irradiates a drum-shaped electrophotographic photosensitive member (hereinafter referred to as a photosensitive drum) 101 with a laser light image based on image information from an optical system (scanner) 14 to the photosensitive layer. A latent image is formed, and the latent image is developed using a developer to form a developer image. In synchronism with the formation of the developer image, the sheet 2 which is a recording material such as recording paper, an OHP sheet, and cloth is conveyed from the cassette 3 by the pickup roller 4 and the conveying roller pairs 5a and 5b. The developer image formed on the photosensitive drum 101 in the image forming unit formed into a cartridge as the process cartridge 100 is transferred to the sheet 2 by applying a voltage to a transfer roller 15 as a transfer unit provided in the apparatus main body. The sheet 2 to which the developer image has been transferred is guided by a guide plate 8 and conveyed to a fixing unit including a driving roller 9a and a fixing roller 9b incorporating a heater. This fixing unit applies heat and pressure to the sheet 2 to fix the developer image on the sheet 2 by nipping and conveying the sheet 2 at a fixing nip where the driving roller 9 a and the fixing roller 9 b are in pressure contact with each other. The sheet 2 on which the developer image is fixed is conveyed through a reverse conveyance path and is discharged to a discharge tray 13 outside the apparatus via a pair of discharge rollers 10a, 10b, 11a, 11b, 12a, and 12b.

  The process cartridge 100 includes a photosensitive drum 101 and at least one process unit involved in an image forming process in the image forming unit, and is configured to be detachable from the apparatus main body. Here, as the process means, for example, a charging means for charging the photosensitive drum 1, a developing means for developing the latent image formed on the photosensitive drum 1, a cleaning means for cleaning the developer remaining on the surface of the photosensitive drum, etc. (Not shown).

  FIG. 1 is a schematic perspective view of a universal cassette 3 as a sheet storage device according to the present embodiment. The cassette 3 has a stacking portion 30 which is a concave portion opened upward so that sheets 2 of various sizes can be stacked and stored, and a function of regulating the side end position of the sheet 2 in the stacking portion 30 and stabilizing the feeding state. And a pair of reference-side end regulating members 31 and an adjustment-side end regulating member 32.

A reference-side end regulating member 31 (hereinafter referred to as a regulating member 31) serving as a second regulating unit and an adjustment-side end regulating member 32 (hereinafter referred to as a regulating member 32) serving as a first regulating unit are arranged in the conveying direction of the sheet 2. Each has a regulation surface facing each other in the orthogonal width direction. The regulating members 31 and 32 are stacked so that the facing distance between the regulating surface of the regulating member 31 as the second regulating surface and the regulating surface of the regulating member 32 as the first regulating surface is changed according to the sheet size. The relative position in the unit 30 is configured to be variable. The restricting member 32 is configured to determine the position in the stacking portion 30 by being engaged with the cassette 3 by a stopper 35 described later, and a release lever 33 for releasing the engagement by the stopper 35 is provided. . The user can move the restricting member 32 so that the positions of the restricting members 31 and 32 in the stacking portion 30 are changed by operating the release lever 33 to release the engagement by the stopper 35. As will be described later, the regulating member 31 is configured to move so as to change the position in the stacking unit 30 in conjunction with the movement of the regulating member 32. With such a configuration, it is possible to regulate the stacking position of various sizes of sheets in the stacking unit 30 according to the sheet size.

  FIG. 3 is a plan view of the universal cassette 3 and shows a state when the stacking unit 30 is viewed from above. The pair of regulating members 31 and 32 are provided with rack portions 31 c and 32 c, respectively, and the rack portions 31 c and 32 c mesh with a pinion gear 37 provided in the cassette 3. When the restricting member 32 is moved in the width direction of the sheet S, the pinion gear 37 rotates, and the restricting member 31 moves in the opposite direction in conjunction with it. A cassette rack 39 is provided at the bottom of the cassette 3, and the restriction member 32 is positioned and fixed to the cassette 3 by engaging with a stopper 35 provided on the restriction member 32. Further, the pinion gear 37 is also fixed by fixing the restriction member 32, and as a result, the restriction member 31 is also positioned and fixed to the cassette 3.

  FIG. 4 is a schematic perspective view showing the configuration of the adjustment side end regulating member 32. A positioning mechanism provided on the regulating member 32 will be described. The restricting member 32 includes a restricting portion main body 32d configured in a substantially L shape. The restriction portion main body 32d supports a restriction surface 32a as a first restriction surface that abuts on the sheet end portion 2a, and a lower surface of the lowermost sheet (in the case of one sheet, the sheet) among the stacked sheets. A loading surface 32b and a rack portion 32c connected to the loading surface 32b are provided. Further, a release lever 33 is assembled to the restricting portion main body 32d so as to be rotatable around a rotation shaft 33d extending in the sheet stacking direction (a direction perpendicular to the surface of the stacked sheets). In the same manner as the restriction member 32, the restriction member 31 includes a restriction surface 31a serving as a second restriction surface and a stacking surface 31b that supports the lower surface of the stacked sheet on a restriction portion body configured in a substantially L shape. I have. The stacking surface 31b of the restricting member 31 and the stacking surface 32b of the restricting member 32 constitute part of the sheet stacking surface of the stacking unit 30, and the stacking surfaces 31b and 32b are within a range outside the movable range of the restricting members 31 and 32. Is directly provided on the cassette 3.

  A release gear 34 as an operation force conversion unit is connected to the lower portion of the release lever 33, and the release gear 34 rotates in conjunction with the rotation of the release lever 33 (integrally with the release lever 33). The release gear 34 has a D-cut end surface portion 34a as a force receiving portion that engages with a force applying portion 33a for transmitting the rotational force of the release lever 33 to the release gear 34, and a gear portion 34b as a lever gear portion. doing. The release gear 34 is assembled to the restricting portion main body 32d so as to be rotatable about the rotation shaft 34c (see FIG. 6). The release gear 34 receives a force in the rotational direction from the release lever 33 when the D-cut end surface portion 34a is pushed by the force applying portion 33a, and rotates about the rotation axis. A stopper 35 is provided on the restricting portion main body 32d so as to be movable with respect to the restricting portion main body 32d. The stopper 35 has a rack gear portion 35a as a stopper gear portion that meshes with the gear portion 34b of the release gear 34, and an engaging portion 35b that engages with a recess 39a as an engaged portion provided in the cassette rack 39. doing. When the release gear 34 is rotated by the rotation of the release lever 33, the meshing state of the rack gear portion 35a with the gear portion 34b changes, so that the stopper 35 moves linearly relative to the restricting portion main body 32d. The movement direction of the stopper 35 is a horizontal direction orthogonal to the direction in which the regulating members 31 and 32 regulate the stacking position of the sheets S. By the operation of the stopper 35, the engaging portion 35b is engaged with and disengaged from the concave portion 39a of the cassette rack 39.

The release lever 33 includes a pressing portion 33p for pressing the sheet end 2a and a pressed portion 33b as an operated portion operated (pressed) by the user. The pressing portion 33p is configured to be movable between a pressed position retracted from the restricting surface 32a of the restricting portion main body 32a and a pressing position protruding from the restricting surface 32a in the restricting direction of the sheet S by the rotation of the release lever 33. ing. The release lever 33 is configured to receive an urging force from an end pressing spring 38 as a second urging member provided between the restricting portion main body 32a. The urging force acting on the release lever 33 from the end pressing spring 38 is the second urging force so that the pressing portion 33p moves from the pressed position to the pressed position, that is, the pressed portion 33b is pressed by the user. It acts to move in the direction opposite to the moving direction. The stopper 35 is configured to receive an urging force from a stopper spring 36 as a first urging member provided between the restricting portion main body 32a. The urging force acting on the stopper 35 from the stopper spring 36 is moved as a first urging force from the position where the engaging portion 35b is in the non-engaged state to the recessed portion 39a of the cassette rack 39 to the position where it is in the engaged state. Act on.

  The pressing part 33p and the pressed part 33b are provided on opposite sides of the rotation shaft 33d of the release lever 33. The release lever 33 rotates when the user presses the pressed portion 32a with a force larger than the combined force of the biasing force of the stopper spring 36 and the biasing force of the end pressing spring 38. When the release lever 33 rotates, the pressing portion 33p moves from the pressed position toward the non-pressed position, and the stopper 35 is engaged with the cassette rack 39 by the rotation of the release gear 34 accompanying the rotation of the release lever 33. It moves from the position where it is engaged to the position where it is engaged. When the user releases the pressing of the pressed portion 33b, the stopper 35 receives the urging force of the stopper spring 36 and moves to a position where the engaging portion 35b engages with the concave portion 39a, and the pressing portion 33p moves to the end pressing spring 38. It receives an urging force and moves from the pressed position to the pressed position. That is, when no external force is applied to the release lever 33, the engaging portion 35b of the stopper 35 is engaged with the recess 39a of the cassette rack 39, and the restriction member 32 is positioned on the cassette 3. ing. The cassette rack 39 extends along the facing direction of the restricting member 31 and the restricting member 32, and a plurality of recesses 39a recessed in a direction orthogonal to the corresponding direction are provided along the facing direction.

  Here, the timing at which the pressed portion 33b is released and the stopper 35 is engaged with the cassette rack 39 is earlier than the timing at which the pressing portion 33p reaches the pressing position. That is, after the engaging portion 35b of the stopper 35 is fitted into one of the plurality of concave portions 39a of the cassette rack 39 and the regulating member 32 is positioned and fixed with respect to the cassette 3, the pressing portion 33p is connected to the sheet end portion 2a. It is the structure which contacts.

  With reference to FIG.5 and FIG.6, the operation | movement at the time of positioning the control member 32 to a sheet | seat is demonstrated. 5 and 6 are enlarged schematic views showing the periphery of the adjustment-side end regulating member 32 in the universal cassette 3, FIG. 5 is a view seen from above the cassette 3, and FIG. It is the figure seen from the back side. 5 (a) and FIG. 6 (a), FIG. 5 (b) and FIG. 6 (b), FIG. 5 (c) and FIG. 6 (c), FIG. 5 (d) and FIG. It is a corresponding figure.

  5A and 6A show a state where no operating force is applied to the release lever 33, that is, the stopper 35 is engaged with the cassette rack 39 and the regulating member 32 is positioned and fixed to the cassette 3. FIG. It shows the state. That is, the stopper 35 is pressed against the cassette rack 39 by the biasing load of the stopper spring 36, and the engaging portion 35b is fitted in the recess 39a. Further, the release lever 33 is in a state where the pressing portion 33p is positioned at a rotation position (rotation phase) where the pressing portion 33p can press the sheet end portion 2a by the urging force of the end pressing spring 38. As shown in FIG. 5A, in the state shown in FIG. 5, there is a gap between the regulating surface 32 a of the regulating member 32 and the sheet end 2 a, and the end of the sheet S is the regulating member 32. It is in the state before being regulated by. From this state, the user releases the engagement by the stopper 35 by operating the release lever 33, and the position shown in FIG. The regulating member 32 is moved to a position where it can be regulated.

As shown in FIG. 5B, when the user applies a force P to the release lever 33 and rotates the release lever 33 in the R direction, as shown in FIG. 6B, a force applying portion 33a of the release lever 33. When the D-cut end surface portion 34a of the release gear 34 is pressed, the release gear 34 rotates. When the release gear 34 rotates, the stopper 35 moves linearly in the direction of the arrow U due to the meshing with the gear portion 34b of the rack gear portion 35a and is brought into an engaged state with respect to the cassette rack 39. That is, the engaging portion 35b of the stopper 35 is disengaged from the recess 39a of the cassette rack 39, and the restricting member 32 can be freely moved. While maintaining this state, that is, while maintaining the state where the force P is applied to the release lever 33, the user holds the restriction member 32 and moves the restriction member 32 to the desired restriction position in the F direction. When the restricting member 32 is moved to a position where the restricting surface 32a comes into contact with the sheet end 2a, the user releases the pressing of the release lever 33.

  As shown in FIGS. 5C and 6C, the force applied by the user to the release lever 33 is gradually weakened (P ′ <P), and the release lever 33 is moved in the L direction by the urging force of the end pressing spring 38. When the rotation starts, the positioning operation of the regulating member 32 starts. That is, as shown in FIG. 6 (c), the release lever 33 first moves the stopper 35 toward the cassette rack 39 in the direction of the arrow D, the engaging portion 35b fits into the recess 39a, and the restricting member 32 becomes the cassette. 3 is rotated to a position (phase) that is positioned and fixed with respect to 3. At this rotation position (rotation phase), as shown in FIG. 5C, the pressing portion 33p is in a position retracted from the regulating surface 32a (a position away from the sheet end 2a), and the sheet end 2a It does not come into contact.

  As shown in FIGS. 5 (d) and 6 (d), when the user releases the force applied to the release lever 33 and the release lever 33 is free, the release lever 33 moves to the end pressing spring 38. In response to the biasing force, it further rotates in the direction of arrow L. As shown in FIG. 6 (d), the release lever 33 has a play gap between the release gear 34 and the portion 33c on the opposite side of the surface of the force applying portion 33a that contacts the D-cut end surface portion 34a. It has become. The rotation of the release lever 33 at this time is a rotation in which the force applying portion 33a moves in a direction to release the pressure on the D-cut end surface portion 34a, and the force applying portion 33a and the D-cut end surface portion 34a are slightly separated or in contact with each other. Even if it is, it will be in a state where no power is transferred. As a result, the transfer of force between the release lever 33 and the release gear 34 is released, that is, the linkage between the release lever 33 and the release gear 34 is cut off. Accordingly, the release gear 34 remains fixed at the rotational position shown in FIG. 6C, while the release lever 33 rotates under the biasing pressure of the end pressing spring 38. As a result, as shown in FIG. 5D, the pressing portion 33p protrudes toward the sheet S from the regulating surface 32a and presses the sheet end 2a. The pressing portion 33p receives the urging force of the end pressing spring 38 and presses the sheet end portion 2a toward the reference side end regulating member 31 as the second regulating portion with the urging pressure of P2. By receiving this pressing load, the sheet S is sandwiched between the regulating member 31 and the regulating member 32, and the stacked state at the predetermined stacking position in the stacking unit 30 of the cassette 3 is maintained.

  Through these series of operations, after the regulating member 32 is securely fixed at a predetermined regulating position in the cassette 3, the pressing portion 33p is in a state of applying a biasing pressure to the side end portion 2a of the sheet S. Therefore, according to the present embodiment, compared to a configuration in which the biasing pressure is applied before the regulating member is fixed to the cassette, the reaction member does not receive a reaction force when positioning and fixing the regulating member. Therefore, the position of the restricting member does not move delicately. Accordingly, it is possible to more reliably regulate the sheet at a desired stacking position, and as a result, it is possible to stably convey the sheet during image formation. Further, according to this embodiment, the user can easily move the restricting member to a desired position by releasing the stopper by an operation of gripping the restricting member while pressing the release lever. Further, by a simple operation in which the user releases the restriction member (releases the release lever), the restriction member is fixed and the sheet is pressed with a time difference, and the sheet is biased after the restriction member is fixed. Can do. Therefore, according to the present embodiment, the regulating member can be accurately positioned by such a simple operation, and the operability can be improved.

  DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 2 ... Sheet (recording material), 3 ... Universal cassette (sheet storage apparatus), 31 ... Reference | standard side edge part restricting member (2nd restricting part), 32 ... Adjustment side edge part restricting member (1st Restriction part), 32 ... restriction surface (first restriction surface), 33 ... release lever, 34 ... release gear (operation force conversion part), 35 ... stopper, 36 ... stopper spring (first biasing member), 37 ... pinion gear 38 ... End pressing spring (second urging member), 39 ... Cassette rack, 39a ... Recess (engaged portion)

Claims (10)

A stacking unit on which sheets are stacked;
A regulation unit that regulates the stacking position of sheets, and a regulation unit that is movable with respect to the stacking unit so that the regulation position can be changed according to the size of the sheets stacked on the stacking unit;
In a sheet storage device comprising:
The regulation part is
A restricting portion main body having a restricting surface in contact with the sheet end portion and configured to be movable with respect to the stacking portion;
The engagement state that engages with any of the plurality of engaged portions arranged in the stacking portion according to the sheet size and the non-engagement state that does not engage with the engaged portion can be taken. A stopper provided on the restriction body,
When the stopper is in the non-engaged state, the stopper is in a non-pressing position retracted from the restriction surface. When the stopper is in the engaged state, the stopper protrudes from the non-pressing position than the restriction surface. Toward the pressing position for pressing the part, receiving the urging force and moving, and a pressing part provided in the regulating part main body,
A sheet storage device comprising: A lever that is operated by a user to change the state of the stopper, and is provided on the restriction unit body,
The pressing portion is provided integrally with the lever, and moves from the pressing position to the non-pressing position against the biasing force by operating the lever to bring the stopper into the non-engagement state. The sheet storage device according to claim 1, wherein a force that resists the urging force is released by an operation of the lever that brings the stopper into the engaged state. The stopper is moved with respect to the restricting portion main body so that the state changes from the non-engaged state to the engaged state or from the engaged state to the non-engaged state. Is provided in the main body,
The lever is provided so as to be rotatable with respect to the regulation part main body, and has an operated part that is pressed by the user on the opposite side of the pressing part across the rotation shaft.
The regulation part is
An operating force converter that converts the rotational force of the lever into a force that moves the stopper relative to the body of the restrictor; and
A first biasing member that applies a first biasing force to the stopper to move the stopper from the non-engaged state to the engaged state;
A second urging member that imparts to the lever a second urging force that causes the lever to rotate in a direction opposite to the direction in which the operated portion is pressed by the user.
Further comprising
When the operated portion is pressed by the user against the second urging force and the lever rotates, the pressing portion moves from the pressing position to the non-pressing position by the rotation of the lever, and the lever A rotational force is converted by the operating force conversion unit and applied to the stopper, and the state of the stopper changes from the engaged state to the non-engaged state against the first biasing force,
When the user's pressing on the operated part is released and the lever is rotated by the second urging force, the force against the first urging force applied to the stopper from the operating force converting part is released, The pressing portion that receives the second urging force as the urging force and moves after the state of the stopper is changed from the non-engaged state to the engaged state by receiving the first urging force. The sheet storage device according to claim 2, wherein the sheet storage device reaches a pressing position. 4. The sheet storage device according to claim 3, wherein a movement direction of the stopper with respect to the restriction portion main body is a direction orthogonal to a direction in which the restriction portion restricts a stacking position of sheets.   The operating force conversion unit includes a lever gear unit that meshes with a stopper gear unit provided in the stopper, and a force receiving unit that receives a force in a rotation direction from the lever, and the rotation shaft with respect to the regulating unit body The engagement state of the lever gear portion with the stopper gear portion changes so that the stopper moves relative to the regulating portion main body by rotation around the rotation shaft. The sheet storage device according to claim 3 or 4, characterized in that The first urging force acts in a direction in which the restricting portion restricts the stacking position of sheets,
6. The sheet storage device according to claim 3, wherein the second urging force acts in a direction orthogonal to a direction in which the restricting portion restricts a stacking position of the sheets. A sheet storage device mounted on a main body of an image forming apparatus that forms an image on a sheet;
The sheet storage device according to claim 1, wherein the regulating unit regulates a stacking position of sheets in a width direction orthogonal to a direction in which the sheet is conveyed in the image forming apparatus. A second restricting portion provided with a second restricting surface facing the restricting surface as the first restricting surface;
The restricting portion as the first restricting portion is configured to be movable with respect to the stacking portion so as to change a facing distance between the first restricting surface and the second restricting surface according to a sheet size. The sheet storage device according to claim 1, wherein:   The second restricting unit is configured to change a facing distance between the first restricting surface and the second restricting surface according to a sheet size in conjunction with the movement of the first restricting unit with respect to the stacking unit. The sheet storage device according to claim 8, wherein the sheet storage device is configured to be movable with respect to the stacking unit. An image forming apparatus for forming an image on a sheet,
An image forming apparatus comprising the sheet storage device according to claim 1.

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