JP7163090B2 - Sheet conveying device and image forming device - Google Patents

Description

The present invention relates to a sheet conveying device for conveying sheets and an image forming apparatus having the same.

Generally, an electrophotographic printer transfers a toner image formed on a photosensitive drum onto a sheet fed from a cassette, fixes the toner image on the sheet, and then ejects the sheet. Adhered matter such as paper dust may adhere to the sheet due to rubbing between the conveying roller and the separation pad. lead to a decline.

2. Description of the Related Art Conventionally, an image forming apparatus includes a first paper dust removing roller that contacts a sheet to trap paper dust on the sheet, and a first sponge member that scrapes paper dust adhering to the first paper dust removing roller. proposed (see Patent Document 1). In this image forming apparatus, paper dust is scraped off by the first sponge member when the first paper dust removing roller rotates in the forward rotation direction. , the paper dust scraped by the first sponge member may flow back into the conveying path. For this reason, a first reverse-conveyance prevention member is provided upstream of the first sponge member in the normal rotation direction of the first paper dust removing roller to scrape paper dust from the first paper dust removing roller. When the first paper dust removing roller rotates in the reverse direction, the paper dust is scraped off by the first reverse transport prevention member.

Between the first paper dust removing roller and the first reverse conveyance prevention member, there is provided a mechanism that inhibits scraping of paper dust by the first sponge member when the first paper dust removing roller rotates in the normal rotation direction. A small gap is provided to prevent this. This gap allows paper dust to be transported toward the first sponge member when the first paper dust removing roller rotates in the forward direction, and allows the paper dust to be conveyed toward the first sponge member when the second paper dust removing roller rotates in the reverse direction. When the paper dust is present, the paper dust is restricted from being transported toward the transport path as a lump to some extent.

JP-A-2003-267579

However, although the first reverse-conveyance prevention member described in Patent Document 1 can restrict the conveyance of large clumps of paper dust, for example, small-sized paper dust whose main component is the filler of the sheet, etc. Sometimes it slips through. As a result, there is a risk that paper dust that has slipped through this gap will adhere to the photosensitive drum or toner, resulting in an image defect.

Accordingly, the present invention solves the above-described problems by bringing the second contact member into contact with the surface of the rotating body when there is a possibility that the rotating body rotates in the direction opposite to the first direction in which the sheet is conveyed. It is an object of the present invention to provide a sheet conveying device and an image forming apparatus that are capable of performing the functions described above.

The present invention provides a sheet conveying apparatus comprising: an apparatus main body; an opening/closing member supported by the apparatus main body so as to be openable and closable; a rotator; a conveying portion that conveys a sheet in the conveying nip when the rotating body rotates in a first direction; a first contact member that contacts the surface of the rotating body at a first position; a second contact member capable of contacting the surface of the rotating body at a second position downstream of the conveying nip and upstream of the first position in a direction; A contact/separation mechanism that causes a contact member to contact/separate from the surface of the rotating body , and a state detection unit that detects a first state in which the opening/closing member is closed and a second state in which the opening/closing member is opened. and a control section for controlling the actuator based on the state detected by the state detection section , wherein the contact/separation mechanism moves the second contact member to the rotating body in the first state. and the second contact member is brought into contact with the surface of the rotating body in the second state.

Further, the present invention provides a sheet conveying apparatus, comprising: an apparatus main body; a sheet storage portion which is provided to be attachable to and withdrawable from the apparatus main body and stores a sheet; a rotating body; a conveying unit that conveys the sheet stored in the sheet storage unit in the conveying nip when the rotating body rotates in the first direction; a first contact member contacting a body surface at a first position and capable of contacting the surface of the rotating body at a second position downstream of the conveying nip and upstream of the first position in the first direction and a contact/separation mechanism for contacting/separating the second contact member from/to the surface of the rotating body, wherein the contact/separation mechanism is such that the sheet storage portion is attached to the apparatus main body. In a first mounted state, the second contact member is separated from the surface of the rotating body, and in a second state in which the sheet storage portion is pulled out from the apparatus main body, the second contact member is moved to the It is characterized in that it is brought into contact with the surface of the rotating body.

According to the present invention, it is possible to suppress the occurrence of image defects caused by adherents adhering to members provided in the image forming section.

1 is an overall schematic diagram showing a printer according to a first embodiment; FIG. FIG. 4 is an overall schematic diagram showing the printer when the opening/closing door is opened; (a) is a cross-sectional view showing the skew correction unit when the opening/closing door is closed, and (b) is a cross-sectional view showing the skew correction unit when the opening/closing door is open. FIG. 11 is an overall schematic diagram showing the printer when the feeding cassette according to the second embodiment is pulled out; (a) is a cross-sectional view showing the paper dust collecting mechanism when the feeding cassette is attached, and (b) is a cross-sectional view showing the paper dust collecting mechanism when the feeding cassette is pulled out.

<First embodiment>
〔overall structure〕
First, a first embodiment of the present invention will be described. A printer 1 as an image forming apparatus is an electrophotographic laser beam printer that forms a monochrome toner image. As shown in FIG. 1, the printer 1 includes a sheet feeding device 20 that feeds stacked sheets, and a sheet conveying device 40 that conveys the sheets fed by the sheet feeding device 20 . The sheet conveying device 40 includes a sheet conveying path 41 for guiding sheets, a plurality of rollers for conveying sheets in the sheet conveying path 41, and a printer body 2 as a device body covering the sheet conveying path 41 and the rollers. ing. The printer 1 also includes an image forming unit 10 that forms an image on a sheet conveyed by a sheet conveying device 40 , a fixing device 30 that fixes an image transferred onto the sheet, and a discharge tray 36 capable of discharging the sheet. and a roller pair 35 .

When an image forming command is input to the printer 1, the image forming process by the image forming unit 10 is started based on image information input from an external computer or the like connected to the printer 1, and the image forming process is started by the control unit 100. An image signal is created based on the information. The control unit 100 includes a CPU 101, a memory 102 having a ROM 102a for storing programs for controlling each unit, and a RAM 102b for temporarily storing data. The CPU 101 is connected to each drive source, sensor, etc. via an input/output circuit, exchanges signals with each unit, and controls operations.

The image forming section 10 has a process cartridge 12 , a laser scanner 11 and a transfer roller 16 . The process cartridge 12 has a photosensitive drum 13, and a charging roller 14, a developing roller 15, and a cleaning blade (not shown) arranged along the photosensitive drum 13. As shown in FIG. The photosensitive drum 13 and transfer roller 16 form a transfer nip T1. The laser scanner 11 irradiates the photosensitive drum 13 with laser light based on the generated image signal. At this time, the photosensitive drum 13 is charged in advance by the charging roller 14, and an electrostatic latent image is formed on the photosensitive drum 13 by being irradiated with laser light. After that, the electrostatic latent image is developed by the developing roller 15 to form a monochrome toner image on the photosensitive drum 13 .

The sheet S is fed from the sheet feeding device 20 in parallel with the image forming process described above. The sheet feeding device 20 can be attached to and pulled out of the printer main body 2, and has a feeding cassette 21 capable of containing sheets. The downstream side is supported by an intermediate plate 22 . The intermediate plate 22 is biased upward by a spring (not shown). The intermediate plate 22 is pressed downward against the urging force of the spring by a cam (not shown) every time one sheet is fed. The sheet S supported by the intermediate plate is fed by the feeding roller 23, and the sheet S fed by the feeding roller 23 is separated by the feeding roller 23 and the separation pad 24 in contact with the feeding roller 23. separated into pieces.

The sheet conveying device 40 includes a skew correction section 50 having a registration roller (registration roller) 51 and a paper dust collecting roller 52a that contacts the registration roller 51 to form a conveying nip N1. The skew correction unit 50 abuts the leading edge of the sheet S against the conveying nip N1 to correct the skew, and the sheet S is fed to the transfer nip T1 in accordance with the progress of the image forming process in the image forming unit 10. . The skew correction unit 50 also has a paper dust collecting mechanism 52 that collects paper dust as adherents adhering to the surface of the sheet S, and the paper dust collecting roller 52 a is a part of the paper dust collecting mechanism 52 . constitutes In this embodiment, the skew correcting section 50 constitutes a conveying section, the paper dust collecting roller 52a constitutes a rotating member, and the registration roller 51 constitutes a facing member.

At the transfer nip T<b>1 , the toner image on the photosensitive drum 13 is electrostatically transferred onto the sheet S by a transfer bias applied to the transfer roller 16 . Residual toner remaining on the photosensitive drum 13 is collected by a cleaning blade. The sheet S onto which the toner image has been transferred is conveyed to the fixing device 30 . In the fixing device 30 , the sheet S is heated and pressed by the heating device 31 and the pressure roller 32 , and the toner image on the sheet S is fixed to the sheet S. After passing through the fixing device 30 , the sheet S is discharged to the discharge tray 36 by the discharge roller pair 35 .

As shown in FIG. 2, the printer 1 has an opening (not shown) that communicates with the interior of the printer body 2 so that the interior of the printer body 2 can be accessed in order to perform sheet removal work or the like in the event of a sheet jam. and an opening/closing door 3 for covering the opening. The opening/closing door 3 as an opening/closing member is supported by the printer main body 2 so as to be able to be opened and closed, and when closed, the opening is covered, and when opened, the opening is exposed. By opening the opening/closing door 3, the user can remove a sheet that has been jammed in, for example, the conveying nip N1.

Further, the printer 1 is provided with an open/close detector 60 as a state detector for detecting opening/closing of the open/close door 3 . The control unit 100 uses the opening/closing detection unit 60 to determine which state is the closed state, which is the first state in which the door 3 is closed, or the open state, which is the second state in which the door 3 is open. judge.

[Details of paper dust collecting mechanism]
Next, the paper dust collecting mechanism 52 will be described in detail with reference to FIGS. 3(a) and 3(b). 3A is a cross-sectional view showing the skew corrector 50 in the closed state, and FIG. 3B is a cross-sectional view showing the skew corrector 50 in the open state. The paper dust collecting mechanism 52 includes a paper dust collecting roller 52a, a paper dust collecting pad 54 as a first contact member, a backflow prevention pad 55 as a second contact member, a part of the paper dust collecting roller 52a, and a cover member 53 that covers the paper dust collecting pad 54 and the backflow prevention pad 55 . The paper dust collecting roller 52a is in contact with the paper dust collecting pad 54 at the first position A on the surface 52b. It is charged by sliding against. The paper dust conveyed from the sheet feeding device 20 together with the sheet S is removed from the sheet S by adhering to the surface 52b of the charged paper dust collecting roller 52a. The paper dust adhering to the surface 52b is scraped off by the paper dust collection pad 54 which is in constant contact with the surface 52b, and collected in the paper dust collection area S1 provided between the cover member 53 and the internal components. .

The paper dust collecting mechanism 52 is configured such that the backflow prevention pad 55 can come into contact with the surface 52b, and has a contact/separation mechanism 56 that brings the backflow prevention pad 55 into contact with and separates from the surface 52b. The contact/separation mechanism 56 has a backflow prevention pad 55 attached to an end portion 58a, and is supported swingably with respect to the printer main body 2 via a shaft portion 57 at an end portion 58b opposite to the end portion 58a. It has a swing arm 58 . The swing arm 58 is positioned at a separated position where the backflow prevention pad 55 is separated from the surface 52b as shown in FIG. It swings between the abutting position and the abutting position. When the swing arm 58 is positioned at the contact position, the anti-backflow pad 55 contacts the surface 52b at a second position B downstream of the transport nip N1 and upstream of the first position A in the direction of arrow R1. Further, the contact/separation mechanism 56 has an actuator 59 for swinging the swing arm 58 , and is configured to be able to move the backflow prevention pad 55 via the swing arm 58 by the power of the actuator 59 . there is

Details of the operation of the contact/separation mechanism 56 will now be described. When the opening/closing door 3 is closed, the swing arm 58 is stopped at the separated position. When the user opens the open/close door 3 and the open/close door 3 is in the open state, the open/close detection unit 60 of the control unit 100 detects the open state. Based on the detection, the control unit 100 operates the actuator 59 to move the swing arm 58 to the contact position in the direction of the arrow R2, thereby bringing the backflow prevention pad 55 into contact with the surface 52b. Further, when the user closes the open/close door 3 and the open/close door 3 is closed, the control unit 100 detects the closed state by the open/close detection unit 60 . Based on the detection, the controller 100 operates the actuator 59 to move the swing arm 58 to the separated position, thereby separating the backflow prevention pad 55 from the surface 52b.

As described above, the backflow prevention pad 55 is separated from the surface 52b when the opening/closing door 3 is closed. 52b. Therefore, the backflow prevention pad 55 does not hinder the paper dust scraping operation of the paper dust collecting pad 54 .

Further, when a sheet jam occurs and the user opens the opening/closing door 3 and pulls out the sheet remaining in the sheet conveying path 41, the paper dust collecting roller 52a may rotate in the opposite direction of the arrow R1. In this case, the paper dust scraped off by the paper dust collecting pad 54 may ride on the paper dust collecting roller 52a toward the conveying nip N1. However, in the printer 1, when the opening/closing door 3 is open, the backflow prevention pad 55 abuts against the surface 52b to reliably remove the paper dust on the paper dust collecting roller 52a. In addition, since the backflow prevention pad 55 contacts the surface 52b without any gap, it is possible to scrape off even small-sized paper dust such as fillers (for example, calcium carbonate and talc) contained in the sheet S. It is possible to prevent image defects caused by In addition, scraping off the paper dust on the paper dust collection roller 52a reduces the slippage of the sheet S in the conveying nip N1, thereby preventing image defects such as image misalignment in the transfer nip T1. .

Further, since the structure for bringing the backflow prevention pad 55 into contact with and separating from the surface 52b has a simple mechanical and electrical configuration, it is possible to provide the paper dust collecting mechanism 52 with low cost and high reliability.

In the printer 1 according to the first embodiment, the backflow prevention pad 55 is moved by the actuator 59 in conjunction with the opening and closing of the opening/closing door 3, but the present invention is not limited to this. For example, if the backflow prevention pad 55 is mechanically connected to the opening/closing door 3 and configured to come into contact with/separate from the paper dust collecting roller 52a in conjunction with the opening/closing of the opening/closing door 3, this embodiment can be applied. is not limited to

The backflow prevention pad 55 is configured to move in conjunction with the opening and closing of the open/close door 3, and is configured to move in conjunction with the opening and closing of the door that opens and closes the insertion port of the process cartridge 12. may have been The backflow prevention pad 55 is separated from the paper dust collecting roller 52a when the door closed during printing is closed, and contacts the paper dust collecting roller 52a when the door is open. It is not limited to this embodiment.

<Second embodiment>
Next, a second embodiment of the invention will be described. It should be noted that the configuration similar to that of the first embodiment is omitted from the illustration, or the same reference numerals are given to the figure to omit the description. In the printer 1, as shown in FIG. 1, a paper dust collecting mechanism 70 is arranged downstream of the feeding roller 23 and the separation pad 24 in the sheet conveying direction. As shown in FIGS. 4, 5A, and 5B, the paper dust collecting mechanism 70 includes a transport roller 71 rotatably supported by the printer body 2 and a transport nip in contact with the transport roller 71. and a paper dust collecting roller 72 forming N2. That is, the paper dust collecting mechanism 70 forms the transport nip N2 as shown in FIG. Further, the paper dust collecting mechanism 70 eliminates the conveying nip N2 as shown in FIG. As a result, the user can pull out the feed cassette 21, for example, to remove the jammed sheet at the conveying nip N2. In this embodiment, the feeding cassette 21 constitutes a sheet storage portion, the paper dust collecting mechanism 70 constitutes a conveying portion, the conveying roller 71 constitutes a facing member, and the paper dust collecting roller 72 constitutes a rotating body. Configure.

The paper dust collecting mechanism 70 also includes a paper dust collecting pad 73 as a first contact member, a backflow prevention pad 74 as a second contact member, and a backflow prevention pad 74 on the surface 72 a of the paper dust collection roller 72 . and a contact/separation mechanism 75 for contact/separation. The paper dust collecting roller 72 is in contact with the paper dust collecting pad 73 at the first position C on the surface 72a. It is charged by sliding against. The paper dust conveyed from the sheet feeding device 20 together with the sheet S is removed from the sheet S by adhering to the surface 72 a of the charged paper dust collecting roller 72 . The paper dust adhering to the surface 72 a is scraped off by the paper dust collecting pad 73 which is in constant contact with the paper dust collecting roller 72 .

The contact/separation mechanism 75 is movably supported with respect to the feed cassette 21 and has a support portion 76 that supports the backflow prevention pad 74 . The support portion 76 has an end portion 78a rotatably supported by the shaft portion 77, a swing arm 78 supported swingably with respect to the feed cassette 21, and an end portion 79a fixed to the swing arm 78. and a branch portion 79 that A backflow prevention pad 74 is attached to the branch 79 at an end 79b opposite to the end 79a. The support portion 76 has a separated position where the backflow prevention pad 74 is separated from the surface 72a as shown in FIG. 5(a) and a contact position where the backflow prevention pad 74 contacts the surface 72a as shown in FIG. 5(b). and oscillate between. When the support portion 76 is positioned at the contact position, the backflow prevention pad 74 contacts the surface 72a at a second position D downstream of the transport nip N2 and upstream of the first position C in the direction of arrow R3.

The contact/separation mechanism 75 is supported by the feeding cassette 21 and has a spring 80 as a biasing portion that biases the support portion 76 in the direction of arrow R4 from the separation position to the contact position. As a result, the contact/separation mechanism 75 urges the backflow prevention pad 74 toward the surface 72 a of the paper dust collecting roller 72 . The contact/separation mechanism 75 is supported by the printer main body 2 and has a stopper 81 as a pressing portion capable of coming into contact with the end portion 78b of the swing arm 78 opposite to the end portion 78a. When the feeding cassette 21 is in the mounted state, the support portion 76 abuts against the stopper 81 and is restricted from moving in the arrow R4 direction from the separated position. That is, the stopper 81 presses the support portion 76 to restrict the contact of the backflow prevention pad 74 with the surface 72a when the feeding cassette 21 is mounted.

As described above, the backflow prevention pad 74 is separated from the surface 72a of the paper dust collecting roller 72 when the feeding cassette 21 is mounted, so that the paper dust collecting mechanism 70 conveys the sheet S normally. It is separated from the surface 72a when it rotates in the direction of the arrow R3. Therefore, the backflow prevention pad 74 does not hinder the paper dust scraping operation of the paper dust collecting pad 73 .

Further, when the feeding cassette 21 is pulled out, there is a possibility that the paper dust collection roller 72 receives force in the opposite direction of the arrow R3 from the user and rotates in the opposite direction. In this case, the paper dust scraped off by the paper dust collecting pad 73 may ride on the paper dust collecting roller 72 toward the sheet conveying path 41 . However, in the printer 1, when the feed cassette 21 is pulled out, the support portion 76 is separated from the stopper 81, and the backflow prevention pad 74 is pushed against the surface 72a of the paper dust collecting roller 72 by the biasing force of the spring 80. abut. Thereby, the backflow prevention pad 74 can reliably remove the paper dust on the paper dust collecting roller 72 .

The printer 1 according to the second embodiment is configured such that the backflow prevention pad 74 moves in conjunction with the attachment and withdrawal of the feed cassette 21 by a mechanical structure using a spring 80 and a stopper 81. is not limited to this. The printer 1 may be configured to include a detector that detects the mounting state and the drawn-out state of the feed cassette 21 and an actuator that moves the backflow prevention pad 74 . In this case, the actuator operates based on the detection result of the detection unit, and the backflow prevention pad 74 contacts and separates from the paper dust collecting roller 72 .

Further, the printer 1 is configured such that the transport roller 71 and the stopper 81 are supported by the printer body 2, and the paper dust collection roller 72, the support portion 76 and the spring 80 are supported by the feed cassette 21. is not limited to For example, the printer 1 may be configured such that the paper dust collection roller 72 , the support portion 76 and the spring 80 are supported by the printer main body 2 and the transport roller 71 and stopper 81 are supported by the feed cassette 21 . Further, the printer 1 is configured such that the transport roller 71, the paper dust collecting roller 72 and the stopper 81 are supported by the printer body 2, and the support portion 76 and the spring 80 are supported by the feed cassette 21. may be The printer 1 is not limited to this embodiment as long as the support portion 76 and the spring 80 are supported by one of the printer body 2 and the feed cassette 21 and the stopper 81 is supported by the other.

In addition, in the first and second embodiments, the paper dust collection pads 54, 73, the backflow prevention pads 55, 78, and the contact/separation mechanisms 56, 75 are used for rotating paper other than the paper dust collection rollers 52a, 72. It may also be provided to remove dust. For example, it may be provided to remove paper dust from the feed roller 23 and the discharge roller pair 35 . Further, the members that form the conveying nip together with these rotating bodies are not limited to rotating bodies such as rollers and belts, and may be members that do not rotate, such as the separation pad 24 .

In addition, although the electrophotographic printer 1 has been used in each of the above-described embodiments, the present invention is not limited to this. For example, the present invention can also be applied to an inkjet image forming apparatus that forms an image on a sheet by ejecting ink liquid from nozzles.

1: image forming apparatus (printer), 2: apparatus main body (printer main body), 3: opening/closing member (opening/closing door), 10: image forming section, 21: sheet storage section (feeding cassette), 40: sheet conveying device, 50; Conveyance section (skew correction section) 51: Opposing member (registration roller, registration roller) 52a, 72: Rotating body (paper dust collecting roller) 54, 73: First contact member (paper dust collecting pad), 55, 74: second contact member (backflow prevention pad), 56, 75: contact/separation mechanism, 59: actuator, 60: state detection unit (open/close detection unit), 70: transport unit (paper dust collection mechanism ), 71: facing member (conveyance roller), 76: support section, 80: biasing section (spring), 81: pressing section (stopper), 100: control section, N1, N2: conveyance nip

Claims (8)

a device body;
an opening/closing member that is supported by the apparatus main body so as to be openable/closable;
a conveying unit having a rotating body and a facing member forming a conveying nip with the rotating body with respect to the rotating body, and conveying a sheet in the conveying nip when the rotating body rotates in a first direction; ,
a first contact member that contacts the surface of the rotating body at a first position;
a second contact member capable of contacting the surface of the rotating body at a second position downstream of the conveying nip and upstream of the first position in the first direction;
a contact/separation mechanism having an actuator for contacting/separating the second contact member from/to the surface of the rotating body by means of the actuator;
a state detection unit that detects a first state in which the opening/closing member is closed and a second state in which the opening/closing member is opened;
a control unit that controls the actuator based on the state detected by the state detection unit ;
The contact/separation mechanism separates the second contact member from the surface of the rotating body in the first state, and separates the second contact member from the surface of the rotating body in the second state. abut on
A sheet conveying device characterized by: The opening/closing member covers an opening provided in the apparatus main body in the first state, and exposes the opening in the second state.
2. The sheet conveying apparatus according to claim 1, wherein: a device body;
a sheet storage unit that is provided to be attachable to and drawable from the apparatus main body and stores a sheet;
and a facing member that forms a conveying nip with the rotating body with respect to the rotating body, and the sheet is accommodated in the sheet storage portion in the conveying nip when the rotating body rotates in a first direction. a conveying unit that conveys the sheet that has been processed;
a first contact member that contacts the surface of the rotating body at a first position;
a second contact member capable of contacting the surface of the rotating body at a second position downstream of the conveying nip and upstream of the first position in the first direction;
a contact/separation mechanism for contacting/separating the second contact member from/to the surface of the rotating body;
The contact/separation mechanism separates the second contact member from the surface of the rotating body in a first state in which the sheet storage portion is attached to the apparatus main body, and the sheet storage portion is pulled out from the apparatus main body. in the second state, the second contact member is brought into contact with the surface of the rotating body;
A sheet conveying device characterized by: The contact/separation mechanism has an actuator that moves the second contact member,
a state detection unit that detects the first state and the second state;
a control unit that controls the actuator based on the state detected by the state detection unit;
4. The sheet conveying device according to claim 3 , characterized in that: The conveying unit corrects the skew of the sheet by abutting the leading edge of the sheet against the conveying nip.
The sheet conveying apparatus according to any one of claims 1 to 4, characterized in that: the second contact member is supported by one of the apparatus main body and the sheet storage section;
The contact/separation mechanism is movably supported with respect to the apparatus main body, and a support portion that supports the second contact member;
an urging portion that urges the support portion toward the surface of the rotating body;
A pressing force that is supported by the other of the apparatus main body and the sheet storage portion, presses the support portion in the first state, and restricts the second contact member from contacting the surface of the rotating body. and
In the second state, the support part is separated from the pressing part and causes the second contact member to contact the surface of the rotating body by the biasing force of the biasing part.
4. The sheet conveying apparatus according to claim 3, characterized in that: the rotating body, the support portion, and the biasing portion are supported by the sheet storage portion;
The facing member and the pressing portion are supported by the device main body,
7. The sheet conveying device according to claim 6, wherein: A sheet conveying device according to any one of claims 1 to 7;
an image forming unit that forms an image on the sheet conveyed from the sheet conveying device;
An image forming apparatus characterized by:

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