JP2022052352A - Sheet feeding device and image formation device - Google Patents

Abstract

To be able to improve serviceability.SOLUTION: A sheet feeding device has: a positioning member (77) which comes into contact with a part of a device body (1A) when a sheet storage part (60) is mounted to the device body (1A) and positions a sheet storage part (60) in a mounting direction of the sheet storage part (60) with respect to the device body (1A); and a holding member (81) that holds adjustably the positioning member (77), wherein the holding member (81) is detachably provided to the sheet storage part (60).SELECTED DRAWING: Figure 3

Description

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

Conventionally, most of the sheet feeding devices used in image forming devices such as copiers, printers, and facsimiles are sheet storage units (sheet cassettes, sheets) that store sheets and are retractably attached to the image forming device main body. It is also called a tray etc.). The sheets stored in the sheet storage unit are fed one by one to the image forming unit and used as a recording medium for image forming.

The position of the seat storage portion mounted on the image forming apparatus main body may shift due to variations in component dimensions, deformation due to the installation location of the image forming apparatus main body, or the like. Such a positional shift of the sheet storage portion is caused by, for example, the positional relationship between the image forming portion and the seat storage portion being disturbed with respect to the main scanning direction at the time of image formation, so that the image is formed at a position deviated from the original position. It causes that. Patent Document 1 makes it possible to adjust the position of the positioning member step by step in a configuration in which the positioning member provided on the paper feed cassette abuts on the abutting surface of the printer body to position the paper feed cassette with respect to its mounting direction. It is stated that it was done.

Japanese Unexamined Patent Publication No. 2016-27995

In the configuration described in the above document, the positioning member and the support portion of the paper feed cassette that supports the positioning member may be damaged by the impact when the paper feed cassette is vigorously mounted on the main body of the apparatus. However, if the support part of the paper cassette is damaged, the paper cassette itself needs to be replaced, and there is room for improvement in serviceability.

Therefore, an object of the present invention is to provide a sheet feeding device and an image forming device capable of improving serviceability.

According to one aspect of the present invention, the seat feeding device is a seat feeding device having a device main body and a seat storage unit that stores the sheet to be fed and is detachably attached to the device main body. A positioning member that abuts a part of the device body when the seat storage unit is mounted on the device body and positions the seat storage unit in the mounting direction of the seat storage unit with respect to the device body, and the positioning member. It has a holding member that holds the member in an adjustable position, and the holding member is detachably provided with respect to the seat accommodating portion.

According to the present invention, it is possible to provide a sheet feeding device and an image forming device capable of improving serviceability.

The schematic diagram of the image forming apparatus which concerns on embodiment of this disclosure. The figure which looked at the sheet feeding part which concerns on embodiment from above. The perspective view which shows the positioning part of the sheet cassette which concerns on embodiment. The enlarged view of the positioning part of the sheet cassette which concerns on embodiment.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a full-color laser beam printer (hereinafter referred to as printer 1) as an image forming apparatus according to an embodiment of the present disclosure. The printer 1 has a printer main body 1A which is an image forming apparatus main body, and an image forming unit 1B which is housed in the printer main body 1A and forms an image on a sheet. The printer main body 1A includes a metal frame constituting the frame body of the printer 1 and a member fixed to the frame body (for example, an exterior member).

An image reading device 2 installed substantially horizontally is provided above the printer main body 1A. A discharge space S for discharging a sheet is formed between the image reading device 2 in the vertical direction (gravity direction) and the printer main body 1A. Further, in the lower part of the printer 1, a plurality of sheet feeding devices 30 for feeding sheets P used as a recording medium from the sheet cassette 60 are provided in a vertically stacked state. The size and material of the sheet P include paper such as plain paper and cardboard, surface-treated sheet materials such as plastic film, cloth, and coated paper, and specially shaped sheet materials such as envelopes and index paper. A variety of different sheets can be used.

The image forming unit 1B, which is an example of the image forming means, is of a 4-drum full-color system, and has a laser scanner 10 and four colors of yellow (Y), magenta (M), cyan (C), and black (K). It includes four process cartridges 11 that form a toner image. Each process cartridge 11 includes a photosensitive drum 12 which is an image carrier (electrophotographic photosensitive member), a charger 13 which is a charging means, and a developer 14 which is a developing means. Further, the image forming unit 1B includes an intermediate transfer unit 1C arranged above the process cartridge 11 and a fixing unit 20. Further, above each process cartridge 11, a toner cartridge 15 for supplying toner as a developer to the developer 14 is detachably attached to the printer main body 1A.

The intermediate transfer unit 1C is provided inside the intermediate transfer belt 16 wound around the drive roller 16a and the tension roller 16b, and the primary transfer unit 1C is provided inside the intermediate transfer belt 16 and abuts on the intermediate transfer belt 16 at a position facing the photosensitive drum 12. A transfer roller 19 is provided. Here, the intermediate transfer belt 16 (also referred to as a transfer timing belt) is rotated in the arrow direction by a drive roller 16a driven by a drive unit (not shown).

At a position facing 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. Further, the fixing portion 20 is arranged above the secondary transfer roller 17. The fixing portion 20 includes a rotating body pair (for example, a roller pair) that sandwiches and conveys the sheet P, and a heating means (for example, a halogen lamp) for heating the toner image on the sheet P at the nip portion of the rotating body pair. , A heater substrate in which a resistance heating element is arranged on a ceramic substrate). A first discharge roller pair 25a, a second discharge roller pair 25b, and a double-sided reversing portion 1D are arranged above the fixing portion 20. The double-sided reversing portion 1D includes a reversing roller pair 22 capable of forward / reverse reversing, a re-conveyance passage R, and the like.

Next, the image forming operation of the printer 1 will be described. First, when the image information of the original is read by the image reading device 2, the image information is image-processed and then converted into an electric signal and transmitted to the laser scanner 10 of the image forming unit 1B. In the image forming unit 1B, the surface of the photosensitive drum 12 on which the charger 13 rotates is uniformly charged to a predetermined polarity and potential, and the laser scanner 10 modulates the surface based on an electric signal to irradiate the laser beam. The surface of the drum 12 is sequentially exposed. As a result, electrostatic latent images corresponding to the monochromatic 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 by toner of each color as a developer supplied from the developer 14. The developed toner image is 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, a full-color toner image is formed on the intermediate transfer belt 16 by multiple-transferring the toner images of four colors so as to overlap each other.

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

The feeding unit 7 includes a pickup roller 7a that sends out the seat P from the seat cassette 60, a feed roller 7b that receives the seat P from the pickup roller 7a and further conveys the seat P, and a retard roller 7c for separating the seat P. .. The retard roller 7c is arranged in contact with the feed roller 7b, and a separation nip is formed as a separation portion between the feed roller 7b and the retard roller 7c. The retard roller 7c is input with a driving force in a direction opposite to the rotation of the feed roller 7b from the driving source via the torque limiter. When a plurality of 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 to each other, and the uppermost sheet P in contact with the feed roller 7b. The seat P other than the above is pushed back to the seat 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 sucks and conveys the sheet P to a breathable belt by a negative pressure generated by using a fan may be used. Further, the retard roller 7c is an example of a separating member that separates the sheet P, and even if a roller member connected to a fixed shaft via a torque limiter or a pad-shaped friction member that abuts on the feed roller 7b is used. good.

The sheet fed by the feeding unit 7 is skew-corrected by abutting the tip (downstream end in the sheet transport direction) against the registration roller pair 40 in the stopped state. After that, the registration roller pair 40 directs the sheet P toward the transfer nip (secondary transfer unit) 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 unit 1B. And send it out. In the secondary transfer unit, the toner image is transferred from the intermediate transfer belt 16 to the sheet P by the bias voltage (secondary transfer bias) applied to the secondary transfer roller 17. Next, the sheet P to which the toner image is transferred is conveyed to the fixing unit 20, and the toner of each color is melt-mixed by receiving heat and pressure in the fixing unit 20, and an image fixed on the sheet P is obtained.

The sheet P on which the image is fixed is discharged to the discharge space S by the first discharge roller pair 25a or the second discharge roller pair 25b provided downstream of the fixing portion 20, and the loading portion provided at the bottom of the discharge space S. It is loaded on 23. When forming an image on both sides of the sheet P, after the image is transferred and fixed to the first surface, the sheet P is conveyed to the reconveyance passage R by the reversing roller pair 22 and is conveyed to the image forming unit 1B again. Will be done. Then, after the image is transferred and fixed to the second surface, the sheet P is discharged to the discharge space S by the first discharge roller pair 25a or the second discharge roller pair 25b, and is loaded on the loading 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 or an inkjet type or offset printing type image forming unit may be used.

(Sheet cassette)
Here, the configuration of the seat cassette 60 as a seat storage unit (also referred to as a seat storage means or a seat loading means) according to the present embodiment will be described in detail with reference to FIG. FIG. 2 is a schematic view of the sheet cassette 60 mounted at a predetermined mounting position in the printer main body 1A (inside the apparatus main body) as viewed from above.

In the following description, the moving direction of the sheet cassette 60 when the sheet cassette 60 is inserted into the printer main body 1A is referred to as "mounting direction X1". Further, the direction in which the sheet P is fed from the seat cassette 60 by the feeding unit 7 is referred to as "feeding direction Fd". In this embodiment, the feeding direction Fd is a direction that intersects (preferably, vertically intersects) the mounting direction X1. Further, in this embodiment, the feeding direction Fd and the mounting direction X1 intersect perpendicularly with the vertical direction of the printer main body 1A (the gravity direction when the printer main body 1A is installed on a horizontal plane).

The sheet cassette 60 has a cassette body 60A, a loading tray (not shown), a back side regulation plate 61, a front side regulation plate 62, a rear end regulation plate 63, and the like, and the user loads the sheet P on the loading tray. do. The cassette body 60A is a housing (tray shape) 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 a cassette body 60A so as to be movable up and down. On the upstream side of the cassette body 60A in the mounting direction X1, a front cover 60F as a cover member exposed on the upstream side (front side of the printer 1) of the mounting direction X1 is provided. The user can pull out the seat cassette 60 by gripping the grip portion provided on the front cover 60F.

The seat P in the seat cassette 60 is held by the back side regulation plate 61, the front side regulation plate 62, and the rear end regulation plate 63. The back side regulation plate 61 and the front side regulation plate 62 are movably supported by the cassette body 60A in the seat width direction (the direction perpendicular to the feeding direction Fd, the direction along the mounting direction X1). The rear end restricting plate 63 is movably supported by the cassette body 60A with respect to the feeding direction Fd. These restricting members prevent the seat P from shifting from the set position in the seat cassette 60. The set position of the seat P is a position corresponding to the downstream side in the feeding direction Fd and the center of the pickup roller 7a in the seat width direction.

A swing arm 64 is provided on the back side of the seat cassette 60 in the mounting direction X1. The swing arm 64 is a member that protrudes from the side surface on the back side in the mounting direction X1 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 main body 1A is provided with a pull-in unit 66 as a pull-in means for pulling the sheet cassette 60 into a mounting position in the printer main body 1A. The pull-in unit 66 includes a pull-in arm 68 to which a hook 67 is attached to the tip thereof, and a tension spring 73 as an urging member. The retractable arm 68 is supported by a base 69 fixed to a main body frame 79, which is a frame body of the printer main body 1A, and is rotatable about a fulcrum 70 on the base 69. The pull-in arm 68 is provided with an arm pin 71 between the hook 67 and the fulcrum 70. A tension spring 73 is arranged between the arm pin 71 and the base pin 72 on the base 69. The tension spring 73 exerts a force to rotate the pull-in arm 68 around the fulcrum 70.

When the seat cassette 60 is pulled out from the image forming apparatus, the pull-in arm 68 is in a position rotated counterclockwise in the drawing from the state shown in FIG. 2, and the pin receiving surface 91 of the hook 67 is on the upstream side in the mounting direction X1. It is in a state of facing. In this state, the urging force of the tension spring 73 acts as a force for rotating the pull-in arm 68 counterclockwise in the figure.

When the seat cassette 60 in the pulled-out state is inserted toward 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 pushed in to pull in the arm. 68 starts to rotate clockwise around the fulcrum 70 in the figure. When rotated to a certain extent, the urging force of the tension spring 73 acts as a force for rotating the pull-in arm 68 clockwise in the figure. In the process of this operation, the tip of the hook 67 hooks the pin 65 of the swing arm 64. That is, the force of the tension spring 73 for rotating the pull-in arm 68 clockwise in the drawing is directed toward the mounting position of the seat cassette 60 through the engagement between the hook 67 and the pin 65 of the swing arm 64. It acts as an urging force in the mounting direction X1.

An abutting portion 74 is provided on the front side of the seat cassette 60 in the mounting direction X1. When the abutting portion 74 abuts on the abutting surface 92 of the main body frame 79, the sheet cassette 60 is positioned with respect to the mounting direction X1 (front-back direction of the printer 1). The position of the seat cassette 60 in which the abutting portion 74 abuts on the main body frame 79 is the mounting position of the seat cassette 60. The urging force of the tension spring 73 acts in a state where the abutting portion 74 is in contact with the main body frame 79, and the movement of the seat cassette 60 in the direction opposite to the mounting direction X1 (drawing direction X2) is restricted. The seat cassette 60 is held 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. The position accuracy of the image recorded on the sheet by the printer 1 can be ensured.

(Butting part)
The details of the abutting portion 74 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the periphery of the abutting portion 74 in the state where the seat cassette 60 is in the mounting position. FIG. 4 is a view from above of the periphery of the abutting portion 74 in the state where the seat cassette 60 is in the mounting position.

As shown in FIGS. 3 and 4, the abutting 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 by a screw 78. The holding member 81 is detachably fixed to the cassette body 60A by, for example, a fastener such as a screw 87. When the positioning piece 77 abuts on the abutting surface 92 of the main body frame 79 which is a part of the printer main body 1A, the sheet cassette 60 is positioned in the mounting direction X1.

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

As shown in FIG. 3, it is preferable that the main body frame 79 is provided with a reinforcing plate 82 as an example of a reinforcing member that receives a force against which the positioning piece 77 abuts. By suppressing the deformation of the main body frame 79 by the reinforcing plate 82, it is possible to maintain the positioning accuracy of the sheet cassette 60 in the mounted state even if the sheet cassette 60 is repeated, and by extension, the position of the image recorded on the sheet by the printer 1. Contributes to improving accuracy.

The reinforcing plate 82 is provided so as to intersect substantially perpendicular to the abutting surface 92 extending substantially perpendicular to the mounting direction X1. The reinforcing plate 82 supports the surface 93 on the front side of the mounting direction X1 opposite to the abutting surface 92 of the main body frame 79, and is supported by other parts of the main body frame 79 on the back side of the mounting direction X1.

As a specific configuration example, a U-shaped (C-shaped with substantially right-angled corners) sheet metal member opened on the upstream side or the downstream side of the feeding direction Fd in the top view is used as the support 79f of the main body frame 79. Then, one surface of the U-shaped support column 79f (the surface on the front side in the mounting direction X1) is used as the abutting surface 92. Further, a metal plate extending in the mounting direction X1 is used as the reinforcing plate 82, and the abutting surface 92 of the support column 79f and the surface 94 on the opposite side thereof are fixed so as to be bridged. The configuration of the reinforcing member is not limited to this, and the abutting surface 92 and other parts of the main body frame 79 are connected to increase the rigidity, and the abutting surface due to the load applied to the abutting surface 92 from the positioning piece 77 in the mounting direction X1. Anything that reduces the deformation of 92 may be used.

Here, a method of adjusting the position of the seat cassette 60 at the time of mounting 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 mounting direction X1 (that is, extends in a direction that intersects at an angle other than vertical). The frame receiving surface 80 is formed in a rack shape (first rack shape) uneven shape in which a plurality of convex portions protruding in the mounting direction X1 are arranged. The rack shape is, for example, a sawtooth shape in which two types of inclined surfaces inclined at different angles with respect to the mounting direction X1 are periodically arranged in a top view.

The positioning piece 77 is formed with a rack shape 77a (second rack shape) as an uneven shape that meshes with the rack shape of the frame receiving surface 80. Further, the positioning piece 77 is provided with an elongated hole 77b through which the screw 78 penetrates, and the fixed position of the positioning piece 77 with respect to the holding member 81 can be changed (adjustable) as long as the screw 78 moves within the elongated hole 77b. ). For example, when the screw 78 is loosened, the positioning piece 77 is shifted to the left from the position shown in FIG. 4 (see the broken line), and the screw 78 is tightened again, the position of the positioning piece 77 is in front of the mounting direction X1 as compared with the state shown in FIG. Shift to the side. As a result, the position (mounting position) of the seat cassette 60 in which the positioning piece 77 abuts on the main body frame 79 is on the back side of the mounting direction X1 from the position shown in FIG. That is, the mounting position of the seat cassette 60 changes to the back side of the mounting direction X1 as compared with that before the adjustment. On the contrary, when the positioning piece 77 is shifted to the right from the position shown in FIG. 4, the mounting position of the seat cassette 60 changes to the front side in the mounting direction X1 as compared with that before the adjustment.

By the way, when the user mounts the sheet cassette 60 on the printer main body 1A, the positioning piece 77 abuts on the abutting surface 92, so that the positioning piece 77 receives a force from the main body frame 79 toward the front side in the mounting direction X1. The force received by the positioning piece 77 from the main body frame 79 increases as the insertion speed increases and the weight of the sheet housed 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 vigorously closed, the positioning piece 77 may be damaged. Further, in such a case, a strong force may be applied to the portion holding the positioning piece 77 via the positioning piece 77 to cause damage. In particular, in the present embodiment, since the position of the seat cassette 60 in the mounted state can be adjusted by adjusting the position of the positioning piece 77, it is considered that the frame receiving surface 80 or the like for adjusting the position may be damaged. ..

Here, as described above, the positioning piece 77 according to the present embodiment is held in a position-adjustable manner by the holding member 81, and the holding member 81 adopts a configuration in which the holding member 81 is detachably attached to the cassette body 60A. That is, the holding member of the present embodiment is provided detachably from the seat storage portion. Therefore, even if the holding member 81 is damaged, the holding member 81 can be easily removed from the cassette body 60A and replaced with a new holding member 81. If the holding member 81 is a smaller member, the replacement work becomes easier.

If the portion (support portion) that supports the positioning piece 77 is provided as a part of the cassette main body 60A by integral molding or the like, if the support portion is damaged, it becomes necessary to replace the entire cassette main body 60A, which is in terms of serviceability. Is not preferable. On the other hand, in the present embodiment, the holding member 81 for holding the positioning piece 77 is provided as a member that can be attached to and detached from the cassette body 60A, so that the serviceability can be improved. Further, if it takes time to arrange the new cassette main body 60A, the period (downtime) in which the use of the printer 1 is restricted becomes long, and the convenience of the user decreases. However, according to the present embodiment, the downtime is long. It becomes difficult for the printer to change.

Further, when a larger force than expected is applied to the positioning piece 77 as described above, the same large force is also applied to the main body frame 79 having the abutting surface 92. Therefore, by providing the reinforcing plate 82 as described in the present embodiment, the deformation of the main body frame 79 can be reduced.

(Modification example)
In the above-described embodiment, as the position adjusting mechanism of the positioning piece 77, a mechanism for changing the meshing position of the rack shape extending in the direction inclined with respect to the mounting direction X1 has been exemplified, but the position adjusting mechanism is not limited to this. For example, even if the holding member 81 is provided with a staircase shape in which the position of the mounting direction X1 changes stepwise, the position of the positioning piece 77 can be changed depending on which step of the staircase shape the positioning piece 77 abuts. good. Further, for example, the position of the positioning piece 77 may be adjusted steplessly (continuously) by a configuration in which smooth slopes are brought into contact with each other instead of the rack shape of the present embodiment.

In any of the position adjustment mechanisms, even if the engaging portion in which the holding member engages with the positioning member in a repositionable manner or the support portion in which the holding member 81 immovably supports the positioning member after the position adjustment occurs, even if the support portion is damaged. It can be easily replaced by removing the holding member 81 from the cassette body 60A. An example of the "engagement portion" in the above-described embodiment is a rack shape of the frame receiving surface 80, and an example of the "support portion" is a screw hole 81a (FIG. 4) into which the screw 78 is screwed.

Further, the pull-in unit for pulling the sheet cassette 60 into the printer main body 1A has a configuration (toggle type) in which the direction of the force acting on the seat cassette 60 is switched by the tension spring 73 according to the angle of the pull-in arm 68 described in the above-described embodiment. Also called). For example, it is known that the urging force of the spring acts only on the mounting direction X1 regardless of the position of the seat cassette 60. Further, the rail of the printer main body 1A that guides the sheet cassette 60 may be provided with an inclined surface so that the sheet cassette 60 is pulled into the mounting position by its own weight.

(Other embodiments)
In the above-described 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 is, for example, a sheet feeding device (option feeder) used in connection with a printer. May be applied to. In that case, the device main body refers to the device main body (the portion excluding the sheet storage portion) of the sheet feeding device different from the printer main body.

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

Claims (7)

A sheet feeding device having a device main body and a seat storage unit that stores the sheet to be fed and is removably attached to the device main body.
A positioning member that comes into contact with a part of the device body when the seat storage unit is mounted on the device body and positions the seat storage unit in the mounting direction of the seat storage unit with respect to the device body.
A holding member that holds the positioning member so that its position can be adjusted,
Have,
The holding member is detachably provided with respect to the seat storage portion.
A sheet feeding device characterized by that. The apparatus main body supports a frame having an abutting surface with which the positioning member abuts when the seat accommodating portion is attached to the apparatus main body, and a surface of the frame body opposite to the abutting surface. With a reinforcing member for reinforcing the frame body,
The sheet feeding device according to claim 1. The seat accommodating portion is provided on the upstream side in the mounting direction with respect to the space for accommodating the seat, and the cover member exposed to the upstream side in the mounting direction with the seat accommodating portion mounted on the apparatus main body is provided. Have and
The device main body is a corner portion on the upstream side in the mounting direction and on one side of the space in which the seat storage portion is accommodated in the device main body when the frame body of the device main body is viewed from above. It has a support provided in
The holding member holds the positioning member at a position between the cover member and the support column in the mounting direction.
The sheet feeding device according to claim 1 or 2, wherein the sheet feeding device is characterized by the above. The holding member is arranged on the upstream side in the mounting direction with respect to the occupied range of the seat in the state where the maximum size sheet that can be stored in the seat storage portion is stored in the seat storage portion.
The sheet feeding device according to any one of claims 1 to 3, wherein the sheet feeding device is characterized by the above. The holding member has an engaging portion that engages with the positioning member so as to be repositionable, and a support portion that immovably supports the positioning member after the position adjustment with respect to the holding member.
The sheet feeding device according to any one of claims 1 to 4, wherein the sheet feeding device is characterized. Further, it has a pulling-in means for pulling the seat storage portion toward the mounting position in the process of mounting the seat storage portion toward the mounting position in the apparatus main body.
The sheet feeding device according to any one of claims 1 to 5. The sheet feeding device according to any one of claims 1 to 6 and the sheet feeding device.
An image forming means for forming an image on a sheet fed from the sheet feeding device, and an image forming means.
To prepare
An image forming apparatus characterized in that.

Images