JP7129246B2 - image forming device - Google Patents

Description

The present invention relates to an image forming apparatus that forms an image on a sheet.

2. Description of the Related Art Conventionally, an image forming apparatus has been proposed in which a front door is provided on the front of an apparatus main body having an image forming unit for forming an image on a sheet, and is opened for maintenance or removal of jammed sheets (Patent Document 1). reference). This image forming apparatus has a front door provided with a stopper member that locks the lower end of the apparatus main body and the lower end of the front door. The door is configured to be locked. Further, generally, a door unit is known that is provided on the side surface of the apparatus main body and has a manual feeding section for feeding manually fed sheets.

Japanese Patent Application Laid-Open No. 2004-122370

Since the door unit has a manual feeding section, the center of gravity is generally located slightly below the center of the door unit in the vertical direction. In such a door unit, when the stopper member described in Patent Document 1 is configured to lock the lower end of the door unit, the center of gravity of the door unit and the stopper member are displaced in the vertical direction. When such a door unit is opened forcefully, the door unit is locked by a stopper member at a predetermined opening angle, but the door unit tends to be twisted to open further due to inertia, and the door unit tends to be distorted or deformed.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an image forming apparatus capable of reducing twisting of a door unit when the door unit is opened.

The present invention relates to an image forming apparatus comprising: an apparatus main body having an image forming section for forming an image on a sheet; a door unit having a sheet stacking section on which sheets are stacked; and a sheet feeding section for feeding the sheets stacked on the sheet stacking section to the image forming section; and the door unit is attached to the apparatus main body. a regulating portion that abuts on the abutment region of the door unit in an open state and regulates an opening angle of the door unit, wherein the center of gravity of the door unit is positioned to overlap the abutment region in the vertical direction. the center of the contact area in the vertical direction and the center of gravity are located on one side of the center of the door unit in the vertical direction, and the contact area is located at the center of gravity in the radial direction of the shaft It is characterized in that it is located at a position closer to the axis than .

Further, according to another aspect of the present invention, there is provided an image forming apparatus comprising: an apparatus main body having an image forming section for forming an image on a sheet; a door unit having a sheet stacking section on which sheets are stacked; and a feeding roller for feeding the sheets stacked on the sheet stacking section to the image forming section; a regulating portion that abuts on the abutment region of the door unit in the open state to regulate an opening angle of the door unit, wherein the feeding roller is positioned so as to overlap the abutment region in the vertical direction. and the center of the contact area in the vertical direction and the feeding roller are located on one side of the center of the door unit in the vertical direction.

According to the present invention, the center of the contact area in the vertical direction and the center of gravity of the door unit are located on one side of the center of the door unit in the vertical direction. can be reduced.

1 is an overall schematic diagram showing an image forming apparatus according to a first embodiment; FIG. FIG. 2 is a perspective view of the image forming apparatus with the right door open; 1A and 1B are front views of an image forming apparatus, in which FIG. 1A is a front view with a closed right door, and FIG. 1A and 1B are perspective views showing an image forming apparatus, in which FIG. 1A is a perspective view of a state in which a right door is closed, and FIG. A left side view of the right door. Fig. 2A is a right side view showing the image forming apparatus, where (a) is a right side view with the right door closed, and (b) is a right side view with the right door open; 7A and 7B are graphs showing temporal changes in the displacement of the manual feed door in the rotational direction, where (a) is a graph showing temporal changes in a comparative example, and (b) is a graph showing temporal changes in the first embodiment; FIG. 3 is a perspective view of an image forming apparatus according to a second embodiment;

<First embodiment>
[overall structure]
First, a first embodiment of the present invention will be described. As shown in FIG. 1, a printer 100 as an image forming apparatus according to the first embodiment is an electrophotographic laser beam printer that forms four-color toner images. As shown in FIG. 1, the printer 100 includes a reader section 43 for reading an image of a document, and an apparatus main body 90 provided below the reader section 43 . The device main body 90 includes a cassette feeding section 60 , an image forming section 1 , a fixing device 5 and a door unit 2 .

When an image forming command is output to the printer 100 , the image forming process by the image forming section 1 is started based on image information input from an external computer or the like connected to the reader section 43 or the printer 100 . The image forming unit 1 includes scanner units 13Y, 13M, 13C, and 13K, and four process cartridges 1Y for forming four-color images of yellow (Y), magenta (M), cyan (C), and black (K). 1M, 1C, and 1K. Note that the four process cartridges 1Y, 1M, 1C, and 1K have the same configuration except that the colors of the images formed are different, so only the image forming process of the process cartridge 1Y will be described, and the processes of the process cartridges 1M, 1C, and 1K will be described. Description is omitted.

The scanner unit 13Y irradiates the photosensitive drum 11Y of the process cartridge 1Y with laser light based on the input image information. At this time, the photosensitive drum 11Y is charged in advance by the charger 12Y, and an electrostatic latent image is formed on the photosensitive drum 11Y by being irradiated with laser light. Thereafter, the electrostatic latent image is developed by the developing device 14Y to form a yellow (Y) toner image on the photosensitive drum 11Y.

Similarly, toner images of magenta (M), cyan (C) and black (K) are also formed on the photosensitive drums of the process cartridges 1Y, 1M and 1K. The toner images of each color formed on each photosensitive drum are transferred to the intermediate transfer belt 36 by the primary transfer rollers 35Y, 35M, 35C, and 35K, and conveyed to the inner secondary transfer roller 37 by the rotating intermediate transfer belt 36. . Note that the image forming process of each color is performed at the timing of superimposing it on the upstream toner image that has been primarily transferred onto the intermediate transfer belt 36 .

The sheet S is fed from the cassette feeding section 60 or the door unit 2 in parallel with the image forming process described above. The cassette feeding unit 60 has four stages of cassettes 61, 62, 63, 64 and cassette feeding rollers 71, 72, 73, 74 corresponding to the respective cassettes. , a suitable cassette is selected to feed the sheet.

The skew of the fed sheet S is corrected by the registration roller pair 75, and the sheet S is transported at a predetermined transport timing. Then, the full-color toner image on the intermediate transfer belt 36 is transferred onto the sheet S by the inner secondary transfer roller 37 and the outer secondary transfer roller 41 . The sheet S onto which the toner image has been transferred is conveyed by the belt conveying body 42 and is given predetermined heat and pressure in the fixing device 5 to melt and fix the toner. The sheet S that has passed through the fixing device 5 is discharged from the discharge port 50 to the outside of the machine.

When images are formed on both sides of the sheet, the sheet S having the image formed on the first surface and having passed through the fixing device 5 is conveyed to the reversing conveying path 52 and is conveyed in a switchback manner to be turned upside down and front to back. . Then, the sheet S is conveyed again to the registration roller pair 75 via the double-sided conveying path 85 , and the toner image is transferred to the second surface by the inner secondary transfer roller 37 and the outer secondary transfer roller 41 .

The printer 100 includes a display device 9 including a liquid crystal panel capable of displaying various information about the printer 100 and an operation section. The display device 9 displays error information of the printer 100, information about replacement timing of consumable parts, information about various settings of the printer 100 when forming an image on the sheet S by the image forming section 1, and the like. The display device 9 is supported by a support arm 10 as a support member arranged on the back side of the door unit 2 in FIG. 1 and supported by the device main body 90 . The support arm 10 extends from the lower end of the door unit 2 to the upper end of the printer 100 in the vertical direction.

[Manual feed door]
Next, the door unit 2 will be described in detail. The door unit 2 includes an exterior portion 20 supported by the apparatus main body 90 so as to be openable and closable, a manual feed tray 18 on which sheets S are stacked, and a sheet for feeding the sheets S stacked on the manual feed tray 18 to the image forming section 1. and a feeding unit 3 .

The exterior portion 20 is integrally formed of synthetic resin into a box shape, is arranged to protrude from the side surface 91 of the apparatus main body 90, and holds the manual feed tray 18 as a sheet stacking portion and the sheet feeding portion 3. . The manual feed tray 18 is supported so as to be openable and closable with respect to an exterior part 20 about an axis extending in the width direction W (see FIG. 5) of the sheets S stacked on the manual feed tray 18. The exterior part shown in FIG. It is configured such that the sheet S can be stacked in a state opened with respect to 20 . The sheet feeding section 3 has a pickup roller 70 as a feeding roller, a feed roller 77, a retard roller 76, and a driving motor 30 (see FIG. 3) as a driving source, and generates driving force. It is driven by the drive motor 30 .

The pickup roller 70 is supported by a pickup arm 78 so as to be able to move up and down, and is rotated by the driving force of the drive motor 30 while being pressed against the uppermost sheet of the sheets S stacked on the manual feed tray 18 by a spring (not shown). The feed roller 77 is rotated by the driving force of the drive motor 30 and conveys the sheet S fed by the pickup roller 70 .

The retard roller 76 is pressed against the feed roller 77 from below, and is rotated by a driving force in a direction opposite to the sheet conveying direction from the drive motor 30 via a torque limiter (not shown) to push the conveyed sheet S by 1 Separate each piece. The pickup roller 70 constitutes feeding means in this embodiment, and the feed roller 77 and retard roller 76 constitute separating means in this embodiment. With such a configuration, the sheet feeding section 3 feeds the sheets S stacked on the manual feed tray 18 one by one from the uppermost sheet. The sheet S fed by the sheet feeding section 3 is conveyed downstream in the sheet conveying direction by a pull-out roller pair 89 provided in the apparatus main body 90 .

As shown in FIGS. 2 to 4, the door unit 2 opens and closes with respect to the apparatus main body 90 about an axis L extending vertically through a cylindrical shaft portion 6 arranged adjacent to the support arm 10. supported as possible.

The door unit 2 has a handle 7 that can be operated from the outside while the door unit 2 is closed with respect to the device main body 90 . The handle portion 7 engages with the handle receiving portion 8 of the apparatus main body 90 in a state in which the door unit 2 is closed with respect to the apparatus main body 90, thereby restricting the door unit 2 from opening. When the handle portion 7 is operated and the engagement between the handle portion 7 and the handle receiving portion 8 is released, the door unit 2 becomes openable and closable. When the door unit 2 is opened, the feed roller 77 and the retard roller 76 of the door unit 2, the pull-out roller pair 89 of the apparatus main body 90 (see FIG. 1), etc. are exposed, and maintenance work, removal of jammed sheets, and the like are exposed. becomes possible to do.

As shown in FIG. 5, the exterior part 20 includes a bottom surface 21 (see FIG. 1) arranged outside the side surface 91 of the apparatus body 90, a bottom surface 22, a top surface 23 facing the bottom surface 22, and a top surface 23 and a bottom surface. 22 and a left side 26 facing the right side 25 . The bottom surface 21 is arranged along the side surface 91 of the device main body 90 . The lower surface 22 extends in the width direction W of the sheets S stacked on the manual feed tray 18 (see FIG. 1). The right side surface 25 has a first surface 27 extending in the vertical direction, and a second surface 28 connecting the upper end of the first surface 27 and the upper surface 23 and extending so as to be inclined with respect to the vertical direction. . That is, the vertical center of the first surface 27 is located below the line C, which is the vertical center of the door unit 2 .

In this manner, the first surface 27, the second surface 28, and the upper surface 23 of the exterior portion 20 form a concave portion D1 with a depressed corner formed by the extended surface P1 of the upper surface 23 and the extended surface P2 of the first surface 27. ing. The axis L is arranged near the end of the first surface 27 on the side surface 91 side of the device main body 90, that is, on the front side in FIG. In addition, a plurality of reinforcing ribs R are formed on the inner side of the exterior part 20. The reinforcing ribs R improve rigidity and reduce distortion and deformation when an external force is applied.

Also, the rotating shaft 19 (see FIG. 1) of the manual feed tray 18 and the sheet feeding section 3 are located on one side of the line C which is the vertical center of the upper surface 23 and the lower surface 22, that is, the vertical center of the door unit 2. , that is, it is arranged in the region B which is the region on the lower side. Further, since the door unit 2 does not have heavy components such as driving parts on the other side, that is, the upper side of the line C, the center of gravity G of the door unit 2 is the center of the door unit 2 in the vertical direction. It is located in area B, which is an area below a certain line C. FIG.

As shown in FIG. 6 , when the door unit 2 is opened with respect to the apparatus main body 90 , the first surface 27 of the exterior part 20 contacts the support arm 10 from the lower end to the upper end of the first surface 27 . By contact, the opening angle of the door unit 2 is regulated. Specifically, when the door unit 2 is opened at a predetermined angle with respect to the device main body 90, the end portion 29 on the bottom surface 21 side of the first surface 27, that is, the front side in FIG. It rests on the support arm 10 over its upper end. In this way, the end portion 29 of the first surface 27 on the side of the bottom surface 21 that contacts the support arm 10 when the door unit 2 is opened with respect to the apparatus main body 90 has its upper end located below the upper surface of the door unit 2 . is doing.

Note that the center of gravity G described above is located at a position overlapping the end portion 29 of the first surface 27 on the bottom surface 21 side in the vertical direction. Further, the support arm 10 constitutes the restricting portion in the present embodiment, and the end portion 29 of the first surface 27 on the bottom surface 21 side constitutes the contact area in the present embodiment. That is, the center of the contact area in the vertical direction is located below the line C, which is the center of the door unit 2 in the vertical direction. Thus, when the door unit 2 is opened with respect to the apparatus main body 90, the door unit 2 abuts on the support arm 10 at a position overlapping the center of gravity G in the vertical direction, and the support arm 10 is positioned above the door unit 2 where the recess D1 is located. It is configured so as not to abut against 10 .

In addition, the printer 100 connects the apparatus main body 90 and the door unit 2, and in a state in which the door unit 2 is opened with respect to the apparatus main body 90, a holding means (not shown) as holding means for holding the open angle of the door unit 2 is provided. It has an arm. The holding arm has a base portion provided on the device main body 90 side, and an arm portion whose one end is connected to the door unit 2 side and whose other end slides on the base portion. A concave portion is formed on the sliding surface of the base portion on which the arm portion slides, and a convex portion is formed on the other end of the arm portion. When the door unit 2 is opened with respect to the device main body 90, the convex portion of the arm portion engages with the concave portion of the base portion, and the opening angle of the door unit 2 is maintained. When the door unit 2 is pushed in the closing direction with a force equal to or greater than a predetermined force while the protrusion of the arm is engaged with the recess of the base, the protrusion of the arm rides over the recess of the base to close the recess of the base. and the projection of the arm are released.

[Example]
An example as an example according to the present embodiment will be described below. In the example according to the present embodiment, the total mass of the manual feed tray 18 and the sheet feeding section 3 (see FIG. 2) excluding the drive motor 30 is 3.5 kg, the mass of the drive motor 30 is 0.5 kg, The total mass of other parts including the exterior part 20 is 0.9 kg. Due to the arrangement of these structures, the center of gravity G of the door unit 2 is located at the position shown in FIG. More specifically, the center of gravity G is positioned farther from the axis L than the right side surface 25 in the radial direction perpendicular to the axial direction of the axis L. As shown in FIG. That is, the end portion 29 (see FIG. 6) of the first surface 27 on the bottom surface 21 side is positioned closer to the axis L than the center of gravity G in the radial direction of the axis L. As shown in FIG.

Under this condition, when the door unit 2 is opened with respect to the device main body 90, the upper portion J, which is the open end on the side opposite to the axis L, of the door unit 2 of the example and the comparative example according to the present embodiment and the A measurement result of the amount of deformation of the lower portion K (see FIG. 2 for both) will be described. The door unit of the comparative example differs from the door unit 2 of the example according to the present embodiment only in that the first surface 27 extends to the upper surface 23 and the concave portion D1 is not formed.

In this measurement, the door units of the comparative example and the example according to the present embodiment were rotated in the opening direction with respect to the apparatus main body 90, and after the door unit abutted against the support arm 10 at a predetermined angular velocity, The displacement of the upper J and lower K manual feed doors in the rotational direction and the change over time were recorded.

As shown in FIG. 7, both the upper portion J and the lower portion K of the door unit of the comparative example and the example according to the present embodiment are deformed by inertial force after the door unit comes into contact with the support arm 10. The door unit is displaced in the opening direction with respect to the device main body 90 . After that, the upper portion J and the lower portion K are displaced in the direction in which the door unit closes with respect to the device main body 90, and the opening angle of the door unit is held by the holding member, so that the opening direction and the closing direction are repeated. Displace and vibrate.

In the door unit of the comparative example, the maximum value of displacement of the upper portion J is smaller than the maximum value of displacement of the lower portion K, indicating that the door unit is twisted. This is because the center of gravity G is located in the area B below the line C, and the area B where the lower part K is located is higher than the area A where the upper part J is located. This is thought to be due to the large inertial force of

On the other hand, in the door unit 2 of the example according to the present embodiment, the difference between the maximum value of the displacement of the lower portion K and the maximum value of the displacement of the upper portion J is smaller than that of the comparative example, and the torsion of the door unit 2 is greater than that of the comparative example. I know it's small. This is because the recessed portion D1 of the region A does not abut on the support arm 10, so that the door unit 2 of the example according to the present embodiment is located in the region A where the upper portion J is located more than the door unit of the comparative example. is likely to be displaced by inertial force.

Further, it can be seen that the door unit 2 of the example according to the present embodiment has a smaller amplitude of vibration generated after coming into contact with the support arm 10 than the door unit of the comparative example. In this manner, the door unit 2 is configured to reduce the burden of vibration after coming into contact with the support arm 10 by forming the concave portion D1.

As described above, in the printer 100 according to the first embodiment, the center of gravity G of the door unit 2 is positioned below the line C, which is the center of the door unit 2 in the vertical direction, and the recess D1 is located on the line C. It is configured to be formed on the lower side with respect to C. As a result, twisting of the door unit 2 when the door unit 2 is opened can be reduced, failure of the door unit 2 can be reduced, and the sheet feeding quality can be improved. Further, as a result, when the door unit 2 comes into contact with the support arm 10, the vibration load on the door unit 2 can be reduced. Furthermore, by reducing the load on the door unit 2 due to torsion and vibration, it is possible to reduce the reinforcing ribs R of the exterior part 20, thereby reducing the weight of the door unit 2 and improving the moldability of the exterior part 20. can be improved.

Further, in the first embodiment, the printer 100 is configured such that the support arm 10, which abuts on the exterior portion 20 of the door unit 2 when the door unit 2 is opened, regulates the opening angle of the door unit 2. ing. As a result, a work space can be easily secured in a state in which the door unit 2 is opened with respect to the apparatus main body 90, and workability in maintenance work, removal of jammed sheets, and the like can be improved.

In the above-described embodiment, the printer 100 has the center of gravity G of the door unit 2 located below the line C, which is the center of the door unit 2 in the vertical direction, and the recess D1 is located above the line C. Although configured to be formed on the side, it is not limited to this. The printer 100 is configured such that the center of gravity G of the door unit 2 is located on one side of the line C, which is the center of the door unit 2 in the vertical direction, and the recess D1 is formed on the other side of the line C. It is good if there is For example, the printer 100 is configured such that the center of gravity G of the door unit 2 is positioned above the line C, which is the center of the door unit 2 in the vertical direction, and the recess D1 is formed below the line C. may be configured.

In addition, in the above-described embodiment, the printer 100 is configured such that the top surface 23, the bottom surface 22, the first surface 27, and the second surface 28 are flat surfaces without unevenness, but the present invention is not limited to this. The printer 100 may be configured to be able to reduce twisting and vibration of the door unit 2 when the door unit 2 is opened. For example, in the printer 100, the upper surface 23, the lower surface 22, the first surface 27, and the second surface 28 have uneven surfaces that do not greatly affect the twisting and vibration of the door unit 2 when the door unit 2 is opened. It may be configured as a curved surface or the like. Further, in such a case, the line C may be the center of the upper end and the lower end of the door unit 2 in the vertical direction. Also, the shape of the recess D1 is not limited to the one described above. Any shape may be employed as long as the first surface 27 does not come into contact with the support arm 10 or the apparatus main body 90 when the first surface 27 comes into contact with the support arm 10 .

In the above-described embodiment, the printer 100 is configured such that the support arm 10 extends from the lower end of the door unit 2 to the upper end of the printer 100 in the vertical direction, but the present invention is not limited to this. The support arm 10 may extend at least from the lower end to the upper end of the door unit 2 in the vertical direction, more specifically, from the lower end to the upper end of the first surface 27 . Also, the upper end and the lower end in this case do not mean the upper end and the lower end in a strict sense.

Further, in the above-described embodiment, the support arm 10 supported by the device main body 90 constitutes a regulation portion that regulates the opening angle of the door unit 2, but the present invention is not limited to this. The restricting portion may be in contact with the apparatus main body 90 when the door unit 2 is open and can restrict the opening angle of the door unit 2. , or the side surface 91 of the device main body 90 may constitute the restricting portion. Further, the printer 100 may be configured so that the first surface 27 comes into contact before the second surface 28 when the door unit 2 is opened with respect to the apparatus main body 90 . For example, when the printer 100 is opened with respect to the apparatus main body 90 , after the first surface 27 contacts the support arm 10 , the door unit 2 is distorted so that the second surface 28 contacts the support arm 10 . It may be configured as

<Second Embodiment>
Next, the printer 101 according to the second embodiment will be explained. The second embodiment differs from the first embodiment only in the shape of the exterior portion and the support arm, and the rest of the configuration is the same, so the description of the same configuration will be omitted.

As shown in FIG. 8, the manual feed door 62 according to the second embodiment has an exterior portion 20 supported by the apparatus main body 90 . The exterior part 20 includes a bottom surface 21 (see FIG. 1) disposed outside the side surface 91 of the apparatus main body 90, a bottom surface 22, a top surface 64 facing the bottom surface 22, and a top surface 64 and a bottom surface 22 extending vertically. and a left side 26 facing the right side 65 . The support arm 40 extends in the vertical direction from the lower end of the manual feed door 62 to the upper end of the printer 101 , and faces the upper end 66 of the right side 65 when the manual feed door 62 is open with respect to the apparatus main body 90 . It has a recessed portion D2.

When the manual feed door 62 is opened with respect to the apparatus main body 90, the end 67 of the right side 65 of the exterior part 63 on the side of the bottom surface 21 abuts the support arm 40, and the opening angle of the manual feed door 62 is increased. Regulated. In addition, the support arm 40 constitutes the restricting portion in the present embodiment, and the region 68 of the end portion 67 on the bottom surface 21 side of the right side surface 65, excluding the upper end portion 66, abuts on the support arm 40. configures the contact area in

As described above, in the second embodiment, the printer 101 does not require a shape constraint such as forming the concave portion D1 in the door unit 2 as in the first embodiment. It is possible to reduce twisting of the door unit 2 when the is opened. Further, similarly to the first embodiment, when the door unit 2 comes into contact with the support arm 10, the vibration load on the door unit 2 can be reduced.

In the second embodiment, the support arm 40 has the concave portion D2 and constitutes a regulating portion that regulates the opening angle of the manual feed door 62, but the present invention is not limited to this. It is sufficient that the restricting portion contacts the apparatus main body 90 while the door unit 2 is open, and can restrict the opening angle of the door unit 2 . For example, another component provided in the device main body 90 may constitute the restricting portion having the recess D2, or the side surface 91 of the device main body 90 may configure the restricting portion having the recess D2.

Further, in any of the above-described embodiments, the printer is not limited to an electrophotographic laser beam printer. For example, the present invention can be applied to an inkjet printer that forms an image on a sheet by ejecting ink liquid from nozzles.

2: Door Unit/3: Sheet Feeding Section/9: Display Device/10: Support Arm (Regulating Section, Supporting Member)/18: Manual Feed Tray (Sheet Stacking Section)/22: Bottom Surface/23: Top Surface/25: Side Surface /27: first surface/28: second surface/29: end (contact area)/30: drive motor (driving source)/62: manual feeding door (door)/65: side surface/68: area ( contact area)/70: pickup roller (feeding means)/76: retard roller (separating means)/77: feed roller (separating means)/90: apparatus body/100: printer (image forming apparatus)/101: printer (Image forming apparatus)/C: Line (center)/D2: Concave portion/G: Center of gravity/L: Axis/S: Sheet

Claims (8)

an apparatus main body having an image forming section for forming an image on a sheet;
A door unit supported to be openable and closable with respect to the main body of the apparatus about a vertically extending shaft, comprising: a sheet stacking section on which sheets are stacked; a door unit having a sheet feeding unit that feeds to
a regulating portion that abuts on a contact region of the door unit in a state where the door unit is open with respect to the device main body, and regulates an opening angle of the door unit;
The center of gravity of the door unit is located at a position overlapping the contact area in the vertical direction,
the center of the contact area in the vertical direction and the center of gravity are located on one side of the center of the door unit in the vertical direction;
the contact area is positioned closer to the shaft than the center of gravity in the radial direction of the shaft;
An image forming apparatus characterized by: The sheet feeding section includes feeding means for feeding the sheets stacked on the sheet stacking section, separation means for separating the sheets fed by the feeding means one by one, the feeding means, and a driving source that generates a driving force for driving the separating means;
2. The image forming apparatus according to claim 1, wherein: The center and the center of gravity of the contact area in the vertical direction are positioned below the center of the door unit in the vertical direction,
3. The image forming apparatus according to claim 1, wherein: the restricting portion extends at least from a lower end portion to an upper end portion of the door unit in the vertical direction;
the center in the vertical direction between the top surface of the door unit and the bottom surface of the door unit is the center in the vertical direction of the door unit;
the upper end of the contact area is located below the upper surface of the door unit;
4. The image forming apparatus according to claim 3 , wherein: A side surface of the door unit connects an upper end of the first surface and the upper surface of the door unit to a first surface on which the contact area is formed and extends in the vertical direction, and is inclined with respect to the vertical direction. a second surface extending to
5. The image forming apparatus according to claim 4 , wherein: the center in the vertical direction between the top surface of the door unit and the bottom surface of the door unit is the center in the vertical direction of the door unit;
the side surface of the door unit on which the contact area is formed connects the bottom surface and the top surface of the door unit;
The restricting portion has a concave portion facing the upper end portion of the side surface in a state in which the door unit is opened with respect to the apparatus main body, and extends from at least the lower end portion of the door unit to the upper end portion of the door unit in the vertical direction. extends up to
4. The image forming apparatus according to claim 3 , wherein: a display device capable of displaying information about settings of the image forming apparatus;
The restricting portion is a support member that is supported by the device body and supports the display device,
7. The image forming apparatus according to claim 1 , wherein: an apparatus main body having an image forming section for forming an image on a sheet;
A door unit supported to be openable and closable with respect to the apparatus main body about a vertically extending shaft includes a sheet stacking section on which sheets are stacked, and a sheet stacked on the sheet stacking section to be transferred to the image forming section. a door unit having a feed roller for feeding to
a regulating portion that abuts on a contact region of the door unit when the door unit is open with respect to the device main body, and regulates an opening angle of the door unit;
The feeding roller is positioned at a position overlapping the contact area in the vertical direction,
The center of the contact area in the vertical direction and the feeding roller are positioned on one side of the center of the door unit in the vertical direction,
An image forming apparatus characterized by:

Images