JP7690270B2 - Sheet feeding device and image forming apparatus - Google Patents

Description

The present invention relates to a sheet feeding device that feeds sheets and an image forming device that forms images on sheets.

Conventionally, many sheet feeding devices used in image forming devices such as copiers, printers, and facsimiles are equipped with a sheet storage section (also called a sheet cassette, sheet tray, etc.) that stores sheets and is attached to the image forming device body so that it can be pulled out. The sheets stored in the sheet storage section are fed one by one toward the image forming section and used as recording media for image formation.

The position of the sheet storage unit installed in the image forming device body may shift due to variations in component dimensions or deformations caused by the installation location of the image forming device body. Such position shifts of the sheet storage unit can cause images to be formed in positions that are shifted from their original positions, for example, by disrupting the positional relationship between the image forming unit and the sheet storage unit in the main scanning direction during image formation. Patent Document 1 describes a configuration in which a positioning member provided on the paper feed cassette abuts against the abutment surface of the printer body to position the paper feed cassette in its installation direction, making it possible to adjust the position of the positioning member in stages.

JP 2016-27995 A

In the configuration described in the above document, the positioning member or the support part of the paper feed cassette that supports the positioning member may be damaged due to the impact when the paper feed cassette is forcefully attached to the device body. However, if the support part of the paper feed cassette is damaged, the paper feed cassette itself must be replaced, leaving room for improvement in serviceability.

Therefore, the present invention aims to provide a sheet feeding device and an image forming device that can improve serviceability.

According to one aspect of the present invention, a sheet feeding device has an apparatus main body, and a sheet storage section that stores sheets to be fed and is attached to the apparatus main body so as to be removable, and is characterized in that it has a positioning member that abuts against a part of the apparatus main body when the sheet storage section is attached to the apparatus main body and positions the sheet storage section in the attachment direction of the sheet storage section relative to the apparatus main body, and a holding member that holds the position of the positioning member so that the position can be adjusted, and the holding member is provided detachably with respect to the sheet storage section.

The present invention provides a sheet feeding device and an image forming device that can improve serviceability.

1 is a schematic diagram of an image forming apparatus according to an embodiment of the present disclosure. FIG. 2 is a diagram showing a sheet feeding portion according to the embodiment as viewed from above. FIG. 4 is a perspective view showing a positioning portion of the sheet cassette according to the embodiment. FIG. 4 is an enlarged view of a positioning portion of the sheet cassette according to the embodiment.

An exemplary embodiment of the present invention will now be described with reference to the drawings.

Figure 1 is a diagram showing the schematic configuration of a full-color laser beam printer (hereinafter referred to as printer 1) as an image forming device according to an embodiment of the present disclosure. Printer 1 has a printer body 1A, which is the main body of the image forming device, and an image forming unit 1B that is housed in the printer body 1A and forms an image on a sheet. The printer body 1A includes a metal frame that constitutes the frame of the printer 1 and members (e.g., exterior members) fixed to the frame.

A nearly horizontally installed image reading device 2 is provided above the printer body 1A. Between the image reading device 2 and the printer body 1A in the vertical direction (gravity direction), an ejection space S for ejecting sheets is formed. In addition, a plurality of sheet feeding devices 30 are provided in a vertically stacked state below the printer 1, which feed sheets P used as recording media from a sheet cassette 60. Note that a variety of sheets of different sizes and materials can be used as the sheets P, including paper such as plain paper and cardboard, sheet materials with surface treatments such as plastic film, cloth, and coated paper, and sheet materials with special shapes such as envelopes and index paper.

Image forming section 1B, which is an example of an image forming means, is a four-drum full-color type and includes a laser scanner 10 and four process cartridges 11 that form toner images in four colors: yellow (Y), magenta (M), cyan (C), and black (K). Each process cartridge 11 includes a photosensitive drum 12 that is an image carrier (electrophotographic photosensitive member), a charger 13 that is a charging means, and a developing unit 14 that is a developing means. Image forming section 1B also includes an intermediate transfer unit 1C arranged above process cartridges 11, and a fixing unit 20. Also, above each process cartridge 11, a toner cartridge 15 for supplying toner as a developer to the developing unit 14 is detachably attached to the printer main body 1A.

The intermediate transfer unit 1C includes an intermediate transfer belt 16 wound around a drive roller 16a and a tension roller 16b, and a primary transfer roller 19 that is provided inside the intermediate transfer belt 16 and contacts the intermediate transfer belt 16 at a position facing the photosensitive drum 12. Here, the intermediate transfer belt 16 (also called a transfer timing belt) is rotated in the direction of the arrow by the drive roller 16a that is driven by a drive unit (not shown).

At a position opposite the drive roller 16a of the intermediate transfer unit 1C, a secondary transfer roller 17 is provided as a transfer means for transferring an image on the intermediate transfer belt 16, which is an intermediate transfer body, to the sheet P. Furthermore, a fixing section 20 is disposed above the secondary transfer roller 17. The fixing section 20 has a pair of rotating bodies (e.g., a pair of rollers) that sandwich and transport the sheet P, and a heating means (e.g., a halogen lamp or a heater substrate with a resistance heating element disposed on a ceramic substrate) for heating the toner image on the sheet P at the nip portion of the pair of rotating bodies. A first discharge roller pair 25a, a second discharge roller pair 25b, and a double-sided reversing section 1D are disposed above the fixing section 20. The double-sided reversing section 1D includes a pair of reversing rollers 22 that can rotate forward and backward, a re-transport path R, etc.

Next, the image forming operation of the printer 1 will be described. First, the image information of the original is read by the image reading device 2, and after image processing, this image information is converted into an electrical signal and transmitted to the laser scanner 10 of the image forming unit 1B. In the image forming unit 1B, the charger 13 uniformly charges the surface of the rotating photosensitive drum 12 to a predetermined polarity and potential, and the laser scanner 10 modulates the laser light based on the electrical signal to sequentially expose the surface of the photosensitive drum 12. As a result, electrostatic latent images corresponding to monochrome images of yellow, magenta, cyan and black are sequentially formed on the photosensitive drum 12 of each process cartridge 11.

These electrostatic latent images are visualized (developed) as toner images using toner of each color supplied as a developer from the developing device 14. The developed toner images are primarily transferred from each photosensitive drum 12 to the intermediate transfer belt 16 by applying a voltage (primary transfer bias) to the primary transfer roller 19. At this time, the four color toner images are multiple-transferred so that they overlap each other, forming a full-color toner image on the intermediate transfer belt 16.

In parallel with the above-mentioned full-color toner image forming process, a sheet P is fed from one of the sheet feeding devices 30 toward the image forming unit 1B. The sheet feeding device 30 includes a sheet cassette 60 as a sheet storage section and a feeding unit 7 as a feeding means, and feeds the sheets P stored in the sheet cassette 60 one by one by the feeding unit 7.

The feeding unit 7 includes a pickup roller 7a that feeds the sheet P from the sheet cassette 60, a feed roller 7b that receives the sheet P from the pickup roller 7a and further conveys it, and a retard roller 7c that separates the sheet P. The retard roller 7c is disposed in contact with the feed roller 7b, and a separation nip is formed between the feed roller 7b and the retard roller 7c as a separation section. A driving force in a direction against the rotation of the feed roller 7b is input to the retard roller 7c from the driving source via a torque limiter. When multiple sheets P enter the separation nip, the retard roller 7c rotates against the rotation direction of the feed roller 7b to slide the sheets P against each other, and pushes back the sheets P other than the top sheet P in contact with the feed roller 7b to the sheet cassette 60. On the other hand, when one sheet P enters the separation nip, the retard roller 7c rotates following the feed roller 7b via the sheet P.

The above-mentioned feeding unit 7 is an example of a feeding means, and for example, a feeding unit that adsorbs and conveys the sheet P to a breathable belt by negative pressure generated by a fan may be used. The retard roller 7c is an example of a separating member that separates the sheet P, and may be a roller member connected to a fixed shaft via a torque limiter, or a pad-like friction member that contacts the feed roller 7b.

The sheet fed by the feeding unit 7 has its leading edge (downstream end in the sheet conveying direction) abutted against the registration roller pair 40, which is in a stopped state, to correct skew. The registration roller pair 40 then sends the sheet P toward the transfer nip (secondary transfer section) between the intermediate transfer belt 16 and the secondary transfer roller 17 at a timing synchronized with the image formation process in the image forming section 1B. In the secondary transfer section, a toner image is transferred from the intermediate transfer belt 16 to the sheet P by a bias voltage (secondary transfer bias) applied to the secondary transfer roller 17. Next, the sheet P to which the toner image has been transferred is conveyed to the fixing section 20, where the toner of each color is melted and mixed under heat and pressure, resulting in an image fixed on the sheet P.

The sheet P on which the image has been fixed is discharged into the discharge space S by the first discharge roller pair 25a or the second discharge roller pair 25b provided downstream of the fixing unit 20, and is stacked on the stacking unit 23 provided at the bottom of the discharge space S. When forming images on both sides of the sheet P, after the image is transferred and fixed on the first side, the sheet P is transported to the re-conveyance path R by the reversing roller pair 22 and transported again to the image forming unit 1B. Then, after the image is transferred and fixed on the second side, the sheet P is discharged into the discharge space S by the first discharge roller pair 25a or the second discharge roller pair 25b, and is stacked on the stacking unit 23. In the above description, the image forming unit 150 is an example of an image forming means, and a direct transfer type electrophotographic unit, an inkjet type or an offset printing type image forming unit may also be used.

(Sheet cassette)
Here, the configuration of the sheet cassette 60 as a sheet storage section (also called a sheet storage means or a sheet stacking means) according to this embodiment will be described in detail with reference to Fig. 2. Fig. 2 is a schematic diagram of the sheet cassette 60, as viewed from above, in a state where it is installed in a predetermined installation position inside the printer main body 1A (inside the device main body).

In the following description, the direction in which the sheet cassette 60 moves when it is inserted into the printer body 1A is referred to as the "mounting direction X1." The direction in which the sheet P is fed from the sheet cassette 60 by the feeding unit 7 is referred to as the "feeding direction Fd." In this embodiment, the feed direction Fd is a direction that intersects (preferably perpendicularly intersects) the mounting direction X1. In this embodiment, the feed direction Fd and the mounting direction X1 intersect perpendicularly with the up-down direction of the printer body 1A (the direction of gravity when the printer body 1A is placed on a horizontal surface).

The sheet cassette 60 has a cassette body 60A, a loading tray (not shown), a rear side regulating plate 61, a front side regulating plate 62, a rear end regulating plate 63, etc., and the user loads the sheets P on the loading tray. The cassette body 60A is a housing (tray-shaped) with an open upper side, and forms a storage space for storing sheets. The loading tray is provided at the bottom of the storage space and is supported by the cassette body 60A so that it can move up and down. On the upstream side of the cassette body 60A in the mounting direction X1, a front cover 60F is provided as a cover member exposed on the upstream side of the mounting direction X1 (the front side of the printer 1). The user can pull out the sheet cassette 60 by gripping a grip provided on the front cover 60F.

The sheet P in the sheet cassette 60 is held by a rear side regulating plate 61, a front side regulating plate 62, and a trailing end regulating plate 63. The rear side regulating plate 61 and the front side regulating plate 62 are supported by the cassette body 60A so as to be movable in the sheet width direction (direction perpendicular to the feeding direction Fd, direction along the mounting direction X1). The trailing end regulating plate 63 is supported by the cassette body 60A so as to be movable in the feeding direction Fd. These regulating members prevent the sheet P from shifting from the set position in the sheet cassette 60. The set position of the sheet P is downstream in the feeding direction Fd and corresponds to the center of the pickup roller 7a in the sheet width direction.

A swing arm 64 is provided on the rear side of the sheet cassette 60 in the mounting direction X1. The swing arm 64 is a member that protrudes in the mounting direction X1 from the rear side surface of the cassette body 60A in the mounting direction X1, and a pin 65 is provided at the tip of the swing arm 64.

The printer body 1A is provided with a retraction unit 66 as a retraction means for retracting the sheet cassette 60 to the mounting position within the printer body 1A. The retraction unit 66 includes a retraction arm 68 with a hook 67 attached to its tip, and a tension spring 73 as a biasing member. The retraction arm 68 is supported by a base 69 fixed to a main body frame 79, which is the framework of the printer body 1A, and can rotate around a fulcrum 70 on the base 69. The retraction arm 68 is provided with an arm pin 71 between the hook 67 and the fulcrum 70. A tension spring 73 is provided between this arm pin 71 and a base pin 72 on the base 69. The tension spring 73 exerts a force that rotates the retraction arm 68 around the fulcrum 70.

When the sheet cassette 60 is pulled out of the image forming device, the retractable arm 68 is rotated counterclockwise from the state shown in FIG. 2, and the pin receiving surface 91 of the hook 67 faces upstream in the mounting direction X1. In this state, the biasing force of the tension spring 73 acts as a force that rotates the retractable arm 68 counterclockwise in the figure.

When the pulled-out sheet cassette 60 is inserted in the mounting direction X1, the pin 65 of the swing arm 64 engages with the pin receiving surface 91, and the pin receiving surface 91 is pressed in, causing the retracting arm 68 to start rotating clockwise around the fulcrum 70. Once rotated to a certain extent, the biasing force of the tension spring 73 acts as a force to rotate the retracting arm 68 clockwise in the figure. During this movement, the tip of the hook 67 hooks the pin 65 of the swing arm 64. In other words, the force of the tension spring 73 that tries to rotate the retracting arm 68 clockwise in the figure acts as a force to bias the sheet cassette 60 in the mounting direction X1 toward the mounting position through the engagement between the hook 67 and the pin 65 of the swing arm 64.

The sheet cassette 60 is provided with an abutment portion 74 on the front side in the mounting direction X1. The abutment portion 74 abuts against the abutment surface 92 of the main frame 79, thereby positioning the sheet cassette 60 in the mounting direction X1 (the front-rear direction of the printer 1). The position of the sheet cassette 60 where the abutment portion 74 abuts against the main frame 79 is the mounting position of the sheet cassette 60. When the abutment portion 74 abuts against the main frame 79, the urging force of the tension spring 73 acts, and the movement of the sheet cassette 60 in the opposite direction to the mounting direction X1 (the pull-out direction X2) is restricted, thereby holding the sheet cassette 60 in the mounting position. By restricting the movement of the sheet cassette 60 in the sheet width direction in the mounted state, the positional relationship between the set position of the sheet P in the sheet cassette 60 and the image forming unit 1B (particularly the photosensitive drum 12) is stabilized, and the positional accuracy of the image recorded on the sheet by the printer 1 can be ensured.

(Abutment part)
The details of the abutment portion 74 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a perspective view showing the periphery of the abutment portion 74 when the sheet cassette 60 is in the installation position. Fig. 4 is a view of the periphery of the abutment portion 74 when the sheet cassette 60 is in the installation position, as viewed from above.

As shown in Figures 3 and 4, the abutment portion 74 has a holding member 81 and a positioning piece 77 as a positioning member. The positioning piece 77 is fixed to the holding member 81 with a screw 78. The holding member 81 is removably fixed to the cassette body 60A with a fastener such as a screw 87. The positioning piece 77 abuts against an abutment surface 92 of a body frame 79, which is part of the printer body 1A, thereby positioning the sheet cassette 60 in the installation direction X1.

The holding member 81 is preferably a member smaller than the cassette body 60A. For example, as shown in FIG. 4, the holding member 81 is arranged to hold the positioning piece 77 between the right front support 79f of the main body frame 79 in the mounting direction X1 and the front cover 60F of the sheet cassette 60. The support 79f is a support that is on the upstream side in the mounting direction X1 of the main body frame 79, which forms a substantially rectangular frame when viewed from above, and that forms a corner on one side of the space in which the sheet cassette 60 is stored in the printer main body 1A (the lower right corner in FIG. 2). In addition, it is preferable to arrange the holding member 81 so that it fits within a range upstream in the mounting direction X1 of the sheet occupancy range Pm when a sheet of the maximum size that can be stored in the sheet cassette 60 is stored.

As shown in FIG. 3, it is preferable to provide the main body frame 79 with a reinforcing plate 82 as an example of a reinforcing member that receives the force of the positioning piece 77 hitting the main body frame 79. The reinforcing plate 82 suppresses deformation of the main body frame 79, so that the positioning accuracy of the sheet cassette 60 in the installed state can be maintained even if the sheet cassette 60 is repeatedly inserted, which contributes to improving the positioning accuracy of the image recorded on the sheet by the printer 1.

The reinforcing plate 82 is arranged to intersect approximately perpendicularly with the abutment surface 92 that extends approximately perpendicularly to the mounting direction X1. The reinforcing plate 82 supports a surface 93 on the opposite side of the main frame 79 from the abutment surface 92 on the front side in the mounting direction X1, and is supported by another part of the main frame 79 on the rear side in the mounting direction X1.

As a specific example of the configuration, a U-shaped (C-shaped with roughly right-angled corners) sheet metal member that opens to the upstream or downstream side in the feed direction Fd when viewed from above is used as the support 79f of the main frame 79. One surface of the U-shaped support 79f (the surface on the front side in the mounting direction X1) is used as the abutment surface 92. A metal plate extending in the mounting direction X1 is used as the reinforcing plate 82 and fixed so as to bridge the abutment surface 92 of the support 79f and the surface 94 on the opposite side. The configuration of the reinforcing member is not limited to this, and it is sufficient if it connects the abutment surface 92 to other parts of the main frame 79 to increase rigidity and reduce deformation of the abutment surface 92 due to the load in the mounting direction X1 applied to the abutment surface 92 from the positioning piece 77.

Here, a method for adjusting the position of the sheet cassette 60 when it is installed will be described. As shown in FIG. 4, the holding member 81 is provided with a frame receiving surface 80 that is inclined with respect to the installation direction X1 (i.e., extends in a direction intersecting at an angle other than perpendicular). The frame receiving surface 80 is formed in a rack shape (first rack shape) (uneven shape) in which multiple convex portions that protrude in the installation direction X1 are arranged. The rack shape is, for example, a sawtooth shape in which two types of inclined surfaces that are inclined at different angles with respect to the installation direction X1 are periodically arranged when viewed from above.

The positioning piece 77 is formed with a rack shape 77a (second rack shape) as a concave-convex shape that meshes with the rack shape of the piece receiving surface 80. The positioning piece 77 is also provided with an elongated hole 77b through which a screw 78 passes, and is configured to be changeable (adjustable) in the fixed position of the positioning piece 77 relative to the holding member 81 as long as the screw 78 moves within the elongated hole 77b. For example, if the screw 78 is loosened and the positioning piece 77 is shifted to the left from the position in FIG. 4 (see dashed line) and then the screw 78 is tightened again, the position of the positioning piece 77 shifts forward in the mounting direction X1 compared to the state in FIG. 4. As a result, the position (mounting position) of the sheet cassette 60 where the positioning piece 77 abuts against the main frame 79 is further back in the mounting direction X1 than the position in FIG. 4. In other words, the mounting position of the sheet cassette 60 changes to the back in the mounting direction X1 compared to before the adjustment. Conversely, if the positioning piece 77 is shifted to the right from the position shown in FIG. 4, the mounting position of the sheet cassette 60 will move forward in the mounting direction X1 compared to before the adjustment.

When the user installs the sheet cassette 60 in the printer body 1A, the positioning piece 77 hits the abutment surface 92, and the positioning piece 77 receives a force from the main frame 79 toward the front side in the installation direction X1. The force that the positioning piece 77 receives from the main frame 79 increases as the insertion speed increases and as the weight of the sheets stored in the sheet cassette 60 increases. If a force larger than expected is applied to the positioning piece 77, such as when the sheet cassette 60 is closed forcefully, the positioning piece 77 may be damaged. In such a case, a strong force may also be applied to the part that holds the positioning piece 77 through the positioning piece 77, causing damage. In particular, in this embodiment, since the position of the sheet cassette 60 in the installed state can be adjusted by adjusting the position of the positioning piece 77, it is possible that the piece receiving surface 80 for adjusting the position may be damaged.

As described above, the positioning piece 77 according to this embodiment is held by the holding member 81 so that its position can be adjusted, and the holding member 81 is removably attached to the cassette body 60A. In other words, the holding member according to this embodiment is provided so that it can be detached from the sheet storage section. Therefore, even if the holding member 81 is damaged, it can be removed from the cassette body 60A and easily replaced with a new holding member 81. If the holding member 81 is a smaller member, the replacement work will be easier.

If the portion (support portion) that supports the positioning piece 77 were provided as part of the cassette body 60A by integral molding or the like, it would be necessary to replace the entire cassette body 60A if the support portion were damaged, which is undesirable in terms of serviceability. In contrast, in this embodiment, the holding member 81 that holds the positioning piece 77 is provided as a member that is detachable from the cassette body 60A, so serviceability can be improved. Also, if it takes time to arrange for a new cassette body 60A, the period during which the use of the printer 1 is restricted (downtime) will be extended, reducing user convenience, but according to this embodiment, long downtime is less likely to occur.

In addition, when a force larger than expected is applied to the positioning piece 77 as described above, a similarly large force is also applied to the main frame 79 having the abutment surface 92. Therefore, by providing the reinforcing plate 82 as described in this embodiment, deformation of the main frame 79 can be reduced.

(Modification)
In the above embodiment, the position adjustment mechanism for the positioning top 77 is exemplified by changing the meshing position of the rack shape extending in a direction inclined with respect to the mounting direction X1, but the position adjustment mechanism is not limited to this. For example, the holding member 81 may be provided with a step shape whose position in the mounting direction X1 changes stepwise, and the position of the positioning top 77 may be changed depending on which step of the step shape the positioning top 77 abuts against. Also, for example, instead of the rack shape of this embodiment, the position of the positioning top 77 may be made steplessly (continuously) adjustable by a configuration in which smooth slopes come into contact with each other.

In either position adjustment mechanism, even if the engagement portion where the holding member engages with the positioning member to change its position or the support portion where the holding member 81 supports the positioning member after position adjustment so that it cannot move is damaged, it can be easily replaced by removing the holding member 81 from the cassette body 60A. Note that an example of the "engagement portion" in the above embodiment is the rack shape of the frame receiving surface 80, and an example of the "support portion" is the screw hole 81a (Figure 4) into which the screw 78 screws.

The retraction unit that retracts the sheet cassette 60 into the printer body 1A is not limited to a configuration (also called a toggle type) in which the direction of the force acting on the sheet cassette 60 by the tension spring 73 is switched depending on the angle of the retraction arm 68 described in the above embodiment. For example, a configuration in which the spring force acts only in the mounting direction X1 regardless of the position of the sheet cassette 60 is known. Also, an inclined surface may be provided on the rail of the printer body 1A that guides the sheet cassette 60 so that the sheet cassette 60 is retracted into the mounting position by its own weight.

Other Embodiments
In the above embodiment, the sheet feeding device provided as a part of the printer 201 as an image forming apparatus has been described, but the present technology may be applied to, for example, a sheet feeding device (optional feeder) that is used in connection with a printer. In this case, the device main body refers to the device main body (excluding the sheet storage unit) of the sheet feeding device that is separate from the printer main body.

1...Image forming device (printer)/1A...Device body (printer body)/30...Sheet feeding device/60...Sheet storage section (sheet cassette)/77...Positioning member (positioning frame)/79...Frame (body frame)/79f...Support/81...Holding member/82...Reinforcing member/92...Abutment surface/X1...Mounting direction

Claims (8)

A sheet feeding device having an apparatus body and a sheet storage unit that stores sheets to be fed and is attached to the apparatus body so as to be removable,
a positioning member that abuts against a part of the device body when the sheet storage unit is attached to the device body and positions the sheet storage unit in a mounting direction of the sheet storage unit relative to the device body;
a holding member that holds the positioning member so as to be position-adjustable;
having
The holding member is provided detachably with respect to the sheet storage section.
A sheet feeding device comprising: the device main body includes a frame having an abutment surface against which the positioning member abuts when the sheet storage unit is attached to the device main body, and a reinforcing member that supports a surface of the frame opposite to the abutment surface and reinforces the frame.
2. The sheet feeding apparatus according to claim 1, wherein the sheet feeding apparatus comprises: the sheet storage unit is provided on the upstream side of the installation direction with respect to a space for storing sheets, and has a cover member that is exposed on the upstream side of the installation direction when the sheet storage unit is installed in the device body,
the device main body has a support pillar provided at a corner on one side of a space in which the sheet storage unit is accommodated within the device main body, the support pillar being provided at a corner on an upstream side of the mounting direction when a frame of the device main body is viewed from above,
The holding member holds the positioning member at a position between the cover member and the support column in the mounting direction.
3. The sheet feeding apparatus according to claim 1, wherein the sheet feeding device is a sheet feeder. the holding member is disposed upstream in the installation direction of a range occupied by a sheet when a sheet of a maximum size that can be stored in the sheet storage section is stored in the sheet storage section.
4. The sheet feeding device according to claim 1, wherein the sheet feeding device is a sheet conveying device. The holding member has an engagement portion that engages with the positioning member so as to be positionally changeable, and a support portion that supports the positioning member after the position adjustment so as not to move relative to the holding member.
5. The sheet feeding device according to claim 1, wherein the sheet feeding device is a sheet conveying device. a retracting unit that retracts the sheet storage unit toward the mounting position in the device body during the process of mounting the sheet storage unit toward the mounting position,
6. The sheet feeding device according to claim 1, wherein the sheet feeding device is a sheet conveying device. a first screw member for fixing the positioning member to the holding member, the first screw member being inserted into a hole portion provided in the positioning member and screwed into the holding member;
a second screw member for fixing the holding member to the sheet storage portion, the second screw member being inserted through a hole portion provided in the holding member and screwed into the sheet storage portion,
a head of the first screw member and a head of the second screw member face in the same direction, and the first screw member and the second screw member are fastened and loosened from the same side of the sheet storage portion.
7. The sheet feeding device according to claim 1, wherein the sheet feeding device is a sheet conveying device. The sheet feeding device according to claim 1 ,
an image forming unit for forming an image on a sheet fed from the sheet feeding device;
Equipped with
1. An image forming apparatus comprising:

Images