Sheet storage device

Abstract

To provide a sheet storage device in which a sheet floating regulating member does not get in the way when removing a sheet in a paper feeder which handles sheets by using air.SOLUTION: Air is blown onto sheets stored in a storage section 220 to separate the sheets. One of a pair of side regulating members 224 that regulate both ends of the sheets in the storage section 220 is provided with a floating regulating member 242 that regulates the sheet from being blown up by air. The floating regulating member 242 is rotatable in the direction in which the sheets are stacked, centered on a rotation axis 242a provided on a side of the side regulating member 224, and is configured to be rotatable upward when a load equal to or greater than a predetermined value that rotates it upward is applied.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a sheet storage device that stores sheets to be supplied to an image forming apparatus, and more particularly to a sheet storage device that can separate and supply stacked sheets one by one by blowing air onto the stacked sheets. [Background technology]

[0002] In image forming devices such as copiers and printers, sheets are separated one by one from a deck that stores stacked sheets, and are removed, subjected to image forming processing, and discharged. However, if the adhesion between sheets increases when stacked on the deck, the separability of the sheets deteriorates. As a result, when sheets are supplied from the deck, multiple sheets are fed in an overlapping state, and misfeeds such as delayed sheet transport are likely to occur. In particular, in a high humidity environment, a larger adhesion force acts between sheets, making multiple feeds and misfeeds more likely to occur.

[0003] For this reason, it has been proposed to blow air onto the edges of the sheets stored on the deck, causing the air to flow between the sheets and lift them up, thereby separating them. In this case, if the air is blown with a high pressure, the sheets may be blown away, or the negative pressure generated when air enters between the sheets that have been separated may cause the sheets to stick together again.

[0004] Therefore, in a device that sorts and sends stored sheets by blowing air, a configuration has been proposed in which a floating height regulating member is provided that regulates the floating height of the sheet by abutting against the top surface of the sheet that is floated by the blowing air (see, for example, Patent Document 1).

[0005] Also, a configuration has been proposed in which stopper members having a fixed eaves structure are provided on the two side regulating members of the sheet storage section to regulate the sheets from floating up due to air (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2011-236058 A [Patent Document 2] JP 2016-113269 A Summary of the Invention [Problem to be solved by the invention]

[0007] When a lift-up restricting member as disclosed in Patent Documents 1 and 2 is provided, there is a risk that it may get in the way when removing the sheet.

[0008] The present invention has been made in consideration of the problems existing in the conventional technology, and has an object to provide a sheet storage device that is easy for a user to operate. [Means for solving the problem]

[0009] In order to solve the above problems, the sheet storage device of the present invention includes a storage section for storing sheets, a sheet transport section for transporting the sheets stored in the storage section in a predetermined transport direction, a pair of regulating members for regulating both ends in the sheet width direction so as to determine a sheet width direction position intersecting the transport direction of the sheet relative to the sheet transport section, an air supply means for supplying air for handling the sheets stored in the storage section, an air blower provided in one of the pair of side regulating members for blowing air supplied by the air supply means from the direction of the end of the sheets stored in the storage section, and a floating regulating member for regulating at a predetermined position a floating height of the sheets floated by the air blown from the air blower, the floating regulating member being rotatable. and the side regulating member on one side has a stopper mechanism that stops the rotation of the floating regulating member to regulate the floating height of a sheet floated by air at the predetermined position, and allows the floating regulating member to rotate if an upward load exceeding a predetermined value is applied when a sheet stored in the storage section is removed, the stopper mechanism having a contact portion that comes into contact with an upper portion of the floating regulating member so as to guide the floating regulating member from the predetermined position to a position above the predetermined position, and when an upward load exceeding a predetermined value is applied to the floating regulating member when a sheet stored in the storage section is removed, the floating regulating member slides along the contact portion and becomes rotatable upward from the predetermined position. Effect of the Invention

[0010] According to the present invention, the upper limit of the floating position of the sheet by air handling is determined, and the floating restriction member does not get in the way when the sheet is removed, improving the operability for the user. [Brief description of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view showing a schematic configuration of an image forming system according to an embodiment. [Diagram 2] FIG. 2 shows a front view of a multi-stage feeding deck according to an embodiment. [Diagram 3] FIG. 2 is a side view showing a state in which a storage cabinet of the multi-stage feeding deck according to the embodiment is pulled out. [Figure 4] FIG. 2 is an enlarged side view showing a state in which a storage cabinet of a multi-stage feeding deck according to an embodiment is pulled out; [Diagram 5] FIG. 2 is an enlarged perspective view showing a state in which a storage cabinet of a multi-stage feeding deck according to an embodiment is pulled out; [Figure 6] FIG. 2 is an enlarged perspective view showing a state in which sheets are set in a storage unit of a multi-stage feeding deck according to an embodiment; [Figure 7] FIG. 13 is a schematic diagram showing an attached state of a rear-side flying height restricting member. [Figure 8] 13 is an enlarged view showing the positional relationship between a rear-side floating restriction member and a rotation restriction guide. FIG. [Figure 9] 13 is a schematic diagram showing a state in which an upward force is applied to the rear-side flying height restricting member; FIG. [Figure 10] FIG. 4 is a schematic diagram showing an attached state of a front-side lift-up restricting member; [Figure 11] 13 is an explanatory diagram of the arrangement of a rear-side floating-up regulating member and a front-side floating-up regulating member as viewed from the sheet transport direction of the storage section; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

[0013] [Image formation system] 1 is a cross-sectional view showing an example of an image forming system including a multi-stage deck and an image forming apparatus according to the present embodiment. In the following description, an image forming apparatus having an image forming section will be described by taking an electrophotographic laser printer system (hereinafter simply referred to as a printer) as an example. The image forming apparatus constituting the image forming system may be a copier, a facsimile, a multifunction machine, etc., in addition to a printer. Furthermore, the image forming apparatus may be configured in a different manner, such as an inkjet type, regardless of the electrophotographic type.

[0014] The image forming system 1000 of this embodiment includes an image forming apparatus 100 and a multi-stage deck 200 as a sheet storage device connected to the image forming apparatus 100. As will be described in detail later, the multi-stage deck 200 includes a plurality of storage chambers each capable of storing a plurality of sheets, and is capable of feeding sheets from each storage chamber to the image forming apparatus 100. Examples of sheets include paper such as plain paper, thin paper, and thick paper, and plastic sheets.

[0015] The image forming apparatus 100 forms a toner image (image) on a sheet in response to an image signal from a document reading device (not shown) connected to the image forming apparatus main body or a host device such as a personal computer communicatively connected to the image forming apparatus main body.

[0016] The image forming apparatus 100 includes an image forming section 110, a plurality of sheet storage devices 120, a sheet conveying device 130, and the like. Each section of the image forming apparatus 100 is controlled by a control section 140. The control section 140 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU controls each section while reading out a program corresponding to a control procedure stored in the ROM. In addition, working data and input data are stored in the RAM, and the CPU performs control by referring to the data stored in the RAM based on the aforementioned programs and the like.

[0017] Each of the sheet storage devices 120 includes a cassette 121 for storing sheets S, a pickup roller 122, and a separation and conveying roller pair 125 consisting of a feed roller 123 and a retard roller 124. The sheets S stored in the cassette 121 are separated and fed one by one by the pickup roller 122 and the separation and conveying roller pair 125, which rotate by moving up and down at a predetermined timing.

[0018] The sheet conveying device 130 includes a conveying roller pair 131, a pre-registration roller pair 132, and a registration roller pair 133. The sheet S fed from the sheet storage device 120 is passed through a sheet conveying path 134 by the conveying roller pair 131 and the pre-registration roller pair 132, and then guided to the registration roller pair 133. Thereafter, the sheet S is sent to the image forming unit 110 by the registration roller pair 133 at a predetermined timing.

[0019] Incidentally, a sheet conveyed from a multi-stage deck 200 described later via a conveying roller pair 201 is conveyed into the image forming apparatus 100 via a connection path 202 with the image forming apparatus 100. Then, the sheet conveyed from the multi-stage deck 200 into the image forming apparatus 100 is sent into the image forming section 110 at a predetermined timing via a pre-registration roller pair 132 and a registration roller pair 133, similar to the sheet conveyed from the sheet storage device 120 in the image forming apparatus 100.

[0020] The image forming unit 110 includes a photosensitive drum 111, a charger 112, a laser scanner 113, a developing unit 114, a transfer charger 115, a separation charger 116, a cleaner 117, and the like. During image formation, the photosensitive drum 111 is rotated in the direction of the arrow in the figure, and first, the surface of the photosensitive drum 111 is uniformly charged by the charger 112. Then, a laser beam emitted from the laser scanner 113 in response to an image signal is reflected by a mirror 118 and irradiated onto the charged photosensitive drum 111, thereby forming an electrostatic latent image on the photosensitive drum 111. Furthermore, the electrostatic latent image thus formed on the photosensitive drum 111 is then visualized as a toner image by the developing unit 114.

[0021] Thereafter, the toner image on the photosensitive drum 111 is transferred to the sheet S by a transfer charger 115 in a transfer section 115a. Furthermore, the sheet S onto which the toner image has been transferred in this manner is electrostatically separated from the photosensitive drum 111 by a separation charger 116. Residual toner remaining on the photosensitive drum 111 after transfer is removed by a cleaner 117. The sheet S onto which the toner image has been transferred is transported by a transport belt 119 to a fixing device 150 where the toner image is fixed, and then discharged outside the apparatus by discharge rollers 151.

[0022] [Multi-deck] Next, the multi-stage deck 200 as a sheet storage device of this embodiment will be described. First, a schematic configuration of the multi-stage deck 200 will be described with reference to Figs. 2 to 6. The multi-stage deck 200 has a plurality of storage cabinets 210 as sheet storage devices each capable of storing a plurality of sheets. The plurality of storage cabinets 210 are arranged vertically in a plurality of stages. Each storage cabinet 210 can be pulled out and inserted into the housing 204 of the multi-stage deck 200. The storage cabinets 210 have the same basic configuration except that they can store different numbers of sheets. Note that the number of sheets that can be stored may be the same.

[0023] Sheets fed from each storage 210 are transported to a connection path 202 (FIG. 1) via a transport path (not shown). Each part of the multi-deck 200 is controlled by a control unit 203 (FIG. 1). The control unit 203 has a CPU, ROM, and RAM, similar to the control unit 140. The control unit 203 is capable of communicating with the control unit 140 of the image forming apparatus 100, and controls the timing of sheet feeding and the like by communicating with the control unit 140.

[0024] The multi-deck 200 has a button 205 as an operation unit for performing the operation of pulling out the storage 210. The button 205 is provided on the front surface of each storage 210. For example, when an operator presses the button 205, a locking mechanism that has locked the storage 210 in the mounting position is released, and the storage 210 is pushed out of the housing 204 by a spring (not shown). This allows the operator to pull out the storage 210 to a position where the sheet can be stored, as shown in Figs. 3 to 5. Note that a configuration may be adopted in which pressing the button 205 causes the storage to automatically move to a position where the sheet can be stored by a motor or the like.

[0025] 4 to 6, the storage 210 has a storage section 220 capable of storing sheets S, and a sheet feeding section 230 that feeds sheets S from the storage section 220 toward the image forming apparatus 100. As shown in FIG. 5, the storage section 220 has a stacking tray 221 on which the sheets S are stacked, an abutting section 222, a trailing end regulating plate 223, a side regulating member 224R, and the like. The stacking tray 221 can be raised and lowered in the vertical direction by a lifting mechanism (not shown). The stacking tray 221 is lowered to a predetermined position when the sheets S are stacked, and gradually rises when the stacked sheets S are fed.

[0026] The abutting portion 222 is disposed downstream in the sheet conveying direction in the storage space 225 in which the sheets are stored, and is abutted by the downstream end (leading end) of the sheet stacked on the stacking tray 221 in the conveying direction. The trailing end regulating plate 223 is disposed upstream in the sheet conveying direction in the storage space 225, and is abutted by the upstream end (rear end) of the sheet stacked on the stacking tray 221 in the conveying direction, thereby regulating the trailing end position of the sheet. The trailing end regulating plate 223 is movable in the sheet conveying direction, and is capable of adjusting the trailing end regulating position of the sheet according to the sheet size. The side regulating members 224 are disposed on both sides in the width direction perpendicular to the sheet conveying direction of the storage space 225, and regulate the positions of both ends in the width direction of the sheet. The side regulating members 224R and 224F are movable in the width direction, and are capable of adjusting the regulating position of the sheet in the width direction according to the sheet size.

[0027] As shown in Fig. 6, one of the side regulating members 224R is provided at the top with two air outlets 240. These are for blowing air sent by air blowing means 241 provided inside the side regulating member 224R to the side edge portion of the sheet P. In this embodiment, two air outlets 241 are provided, but the present invention is not limited to such an embodiment.

[0028] The air blowing means 241 is a fan mechanism that blows air, and the air outlet 240 that blows the air is disposed on the surface of the side regulating member 224R that the sheet abuts against. The air blown from the air blowing means 241 passes through an air passage and is blown from the air outlet 240 onto the uppermost sheet P and the several sheets stacked below it. Note that, although the present embodiment discloses a device equipped with two air blowing means in one storage space, various configurations can be adopted, such as blowing air from one air blowing means through multiple air outlets or providing multiple air blowing means.

[0029] The floating restriction members 242 are arranged in four ways above the air outlet 240, and are provided rotatably about a swing rotation axis provided on the side restriction member 224 side, and are provided in a state of protruding above the sheet P so as to be able to restrict the floating of the sheet P that abuts against the side restriction member 224. As a result, the sheet P that has been floated by the air blown from the air outlet 240 abuts against the floating restriction members 242, and is prevented from floating higher than that position. Therefore, sufficient air is sent between the sheets, and the sheets P are separated and held in an appropriate position where they can be fed, preventing double feeding.

[0030] The floating restriction member 242 will be described in detail. The floating restriction member 242 is attached so as to be rotatable about a rotation axis 242a as a rotation center as shown in FIG. 7. The floating restriction member 242 is provided with an elastic member 244 for maintaining the angle of the restriction member 242 by pulling downward from the rotation axis 242a. The elastic member 244 uses a tension spring, one side of which is attached to an attachment portion 242b provided below the rotation axis 242a, and the other side is attached to an attachment portion 243a fixed to the side restriction member side. Without the elastic member 244, the floating restriction member 242 would rotate clockwise about the rotation axis 242a due to its own weight, but by applying a pulling force with the elastic member 244, the restriction member 242 is held in the floating restriction position as shown in FIG. 7.

[0031] A rotation restriction guide 245 that restricts the rotational force of the upward rotation of the floating restriction member 242 is provided above the floating restriction member 242. The floating restriction member 242 is positioned at a position where it can press the sheet by the force of the elastic member 244. As a result, the rotation restriction guide 245 functions as a stopper to prevent the floating restriction member 242 from rotating upward due to the floating force of the sheet floated by the air blowing means 241.

[0032] In this way, the lift-up restricting member 242 applies different loads when rotating upward and downward, so that the load is greater when rotating upward by air blowing, and the upper limit lift position of the sheet by air handling is reliably secured. On the other hand, the load is smaller when rotating downward when replenishing sheets in the storage section 220, so that the user can store the sheets without resistance, and operability is good.

[0033] The rotation restriction guide 245 has an inclined portion S on the surface with which the floating restriction member 242 abuts. When a user removes sheets without opening between the front side restriction member 224F and the rear side restriction member 224R, the sheet bundle pushes up the floating restriction member 242, and the raised floating restriction member 242 abuts against the inclined portion S of the rotation restriction guide 245 and rotates upward along the inclination. Simultaneously with this rotation, the floating restriction member 242 slides in the direction of arrow A in FIG. 8 by sliding along the inclined portion S, and moves to the state in FIG. 9.

[0034] Incidentally, the front side here refers to the side in front of the user when operating the image forming system 1000, and the rear side refers to the rear side of the apparatus as seen by the user.

[0035] Since the lift-up restricting member 242 rotates along the inclined portion S, it rotates while maintaining a constant lift-up force at the start of rotation without pressing the sheet stack being pushed up. This reduces damage to the top sheet of the sheet stack and the several sheets stacked below it, and also prevents damage to the lift-up restricting member 242 itself.

[0036] The direction in which the lift-up restricting member 242 slides is the paper feed transport direction. On the opposite side to the transport direction, a rear end restricting member 223 is installed to restrict the rear end of the sheet. Normally, when removing a sheet, it is desirable to have the rear end restricting member 223 retracted from the sheet, but if an attempt is made to remove the sheet without retracting it, the lift-up restricting member 242 will slide toward the rear end, causing the top sheet to move with it and hit the rear end restricting member 223, resulting in sheet damage. For this reason, in this embodiment, the lift-up restricting member 242 slides in the transport direction (direction A in FIG. 8), which reduces the occurrence of sheet damage.

[0037] In this way, by making the load on the lift-up regulating member 242 different when it rotates upward and when it rotates downward, when replenishing sheets in the storage section 220, the lift-up regulating member 242 rotates downward with a small load caused by contact with the sheet stack, making it easy to replenish sheets. On the other hand, when rotating upward by air blown from the air blowing means 241, the load increases as it is regulated by the rotation regulating guide 245, so that the lift-up of the sheets due to air handling can be reliably restricted to the upper limit position.

[0038] When sheets are removed from the storage section 220, if a large load is applied to the floating-up restricting member 242 as a result of the user lifting the sheet stack, the floating-up restricting member 242 moves along the inclined portion S of the rotation restricting guide 245, preventing damage caused by the sheet stack being removed hitting the floating-up restricting member 242 hard. When removing sheets, the sheets are pulled out from the front side by lifting the front portion of the device, so the floating-up restricting member 242 side (rear side) of the sheets is unlikely to be lifted when the sheets are removed, and the sheets are unlikely to hit the floating-up restricting member 242 hard. Therefore, the configuration in which the floating-up restricting member 242 moves along the inclined portion S of the rotation restricting guide 245 is a safety measure to prevent damage.

[0039] The floating-up regulating member 242 is provided on the rear side (side regulating surface 224R side) of the loading tray 221, but as also shown in Figure 5, a second floating-up regulating member 342 different from the floating-up regulating member 242 may be provided at a position that contacts the front side of the device, sandwiching the loading tray 221.

[0040] The floating restriction member 342 is provided in two ways on the upper part of the side restriction member 224F, which faces the side restriction member 224R on which the air outlet 240 is provided, across the sheet placement surface. The floating restriction member 342 is provided rotatably about a swing rotation shaft 342a provided on the side restriction member 224F side, and is arranged in a state of protruding above the sheet P so as to be able to restrict the floating of the sheet P abutting against the side restriction member 224F. As a result, the sheet P that is floated by the air blown from the air outlet 240 abuts against the floating restriction member 342, and is prevented from floating higher than that position. Therefore, sufficient air is sent between the sheets, and the sheets P are held in an appropriate position where they can be fed while being separated, thereby preventing double feeding.

[0041] The floating restriction member 342 will be described in detail. The floating restriction member 342 is attached so as to be rotatable about a rotation axis 342a as a rotation center as shown in FIG. 10. The floating restriction member 342 is provided with an elastic member 344 for maintaining the angle of the floating restriction member 342 by pulling downward from the rotation axis 342a. The elastic member 344 uses a tension spring, one side of which is attached to an attachment portion 342b provided below the rotation axis 342a, and the other side is attached to an attachment portion 343a fixed to the side restriction member side. Without the elastic member 244, the floating restriction member 342 would rotate clockwise about the rotation axis 342a due to its own weight, but by applying a pulling force by the elastic member 344, the floating restriction member 342 is held in the floating restriction position as shown in FIG. 10.

[0042] 11, the lift-up restricting member 342 is located away from the air blowing port 240 with the sheet stack sandwiched therebetween, and therefore the portion of the sheet stack on the lift-up restricting member 342 side is little affected by the air blowing, and therefore does not have a configuration for restricting the rotational force of the upward rotation, such as the rotation restricting guide 245, for the lift-up restricting member 242. Therefore, the lift-up restricting member 342 is positioned at a position where it can hold down the sheets P1 that are lifted by the air blowing only with the force of the elastic member 344.

[0043] When the user operates to remove a sheet stack without opening between the side regulation members 224F and 224R, the sheet stack pushes up the lift-up regulation members 242 and 342, but the lift-up regulation member 242 comes into contact with the inclined portion S of the rotation regulation guide 245 and rotates upward along the inclination, whereas the load on the lift-up regulation member 342 when rotating upward is approximately the same as when rotating downward. In other words, when removing a sheet stack, the lift-up regulation member 342 provided on the front side is subjected to a smaller load in response to upward rotation than the rotation regulation guide 245 which is regulated by the rotation regulation guide 245.

[0044] When a user lifts the sheet stack to remove it, a greater force acts on the portion of the sheet stack closest to the user on the side of floatation restricting member 342 (front side) than on the portion on the side of floatation restricting member 242 (rear side), but because the load on floatation restricting member 342 in relation to the upward rotation is small at this time, the load on the sheet stack is also small and the sheets are not damaged. On the other hand, because the sheet stack is pulled out from the front side when the front side is lifted, the rear side is less likely to be lifted when the sheets are removed, and the load on the rear side of the sheet stack when removed is also small.

[0045] In this way, the load applied to the rear-side floating-up regulating member 242 and the floating-up regulating member 342 on the front side of the device when rotating upward is made different, so that the floating-up regulating members 242, 342 do not become an obstacle and damage the sheet when the sheet is removed, making it easy to remove the sheet.

[0046] The rear side close to the air outlet 240 directly receives the air from the fan, but the rotation restriction guide 245 is provided, so that the seat is effectively prevented from being lifted up by the air from the fan.

[0047] In addition, in this embodiment, four rear-side floating-up regulating members are provided in one storage section, while two front-side floating-up regulating members are provided. This allows the sheet closer to the air outlet 240 to be pressed down firmly, while preventing the user from getting in the way when removing the sheet.

[0048] Furthermore, by making the floating control member 242 in the present invention capable of rotating upwards under a load of a certain level or more without being completely fixed, in addition to improving the ease of removal by the user, it is also effective in preventing damage to the device, for example, when the lifter is raised with a foreign object left on the sheet loading section.

[0049] Furthermore, in addition to the method of positioning the lift-up regulating member 242 with a spring and regulating only its upward rotation with a stopper as in this embodiment, it is also possible to adopt a configuration in which, for example, a drive source is provided in the rotating part and the output of the drive source is changed when the lift-up regulating member is rotated upward and downward, or the lift-up regulating member is further held down by a spring-biased lever as a rotation regulating member for the lift-up regulating member. [Explanation of symbols]

[0050] 100 Image forming device 210 Storage (seat storage device) 220 Storage area 224 Side regulation member 224R Rear side regulation member 224F Front side regulating member 230 Sheet feeding section 241 Air blowing means 242 Rear side lift control member 242a Rotation axis 243 Rear side regulation member mounting frame 244 Elastic member (tension spring) 245 Rotation control guide 342 Front side regulating member S slope part P-sheet

Claims

1. A storage section for storing the seat; a sheet conveying section that conveys the sheet stored in the storage section in a predetermined conveying direction; a pair of regulating members for regulating both ends in a sheet width direction, respectively, to determine a position in a sheet width direction intersecting with the conveying direction of the sheet with respect to the sheet conveying unit; an air supplying means for supplying air for handling the sheets stored in the storage section; an air outlet provided in one of the pair of side regulating members and configured to blow air supplied by the air supply means from a direction of an end of the sheet stored in the storage section; a lift-up regulating member that regulates the height at which the sheet is lifted by the air blown from the air blowing port at a predetermined position, The lift-up restricting member is provided to be rotatable, the side regulating member on one side has a stopper mechanism that stops the rotation of the lift-up regulating member to regulate the height to which the sheet lifted by the air rises at the predetermined position, and allows the side regulating member to rotate when an upward load exceeding a predetermined value is applied when removing the sheet stored in the storage section, the stopper mechanism includes a contact portion that comes into contact with an upper portion of the lift-up restricting member so as to guide the lift-up restricting member from the predetermined position to a position above the predetermined position; A sheet storage device characterized in that when an upward load exceeding a predetermined value is applied to the lift-up regulating member when a sheet stored in the storage section is removed, the lift-up regulating member slides along the contact portion and becomes capable of rotating upward from the predetermined position.

2. the storage section is provided so as to be retractable from an insertion position where the storage section is inserted into a main body housing of the sheet storage device to a sheet replenishing position where the storage section is retracted toward the front side of the device, the one side regulating member is provided on the rear side of the storage unit, 2. The sheet storage device according to claim 1, wherein the other of the pair of side regulating members is provided on a front side of the storage section.

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