JP6406271B2 - Sheet feeding apparatus and image forming apparatus having the same - Google Patents

Sheet feeding apparatus and image forming apparatus having the same Download PDF

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JP6406271B2
JP6406271B2 JP2016012323A JP2016012323A JP6406271B2 JP 6406271 B2 JP6406271 B2 JP 6406271B2 JP 2016012323 A JP2016012323 A JP 2016012323A JP 2016012323 A JP2016012323 A JP 2016012323A JP 6406271 B2 JP6406271 B2 JP 6406271B2
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main
gear
sheet
cassette
input gear
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JP2017132564A (en
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浩治 谷尾
浩治 谷尾
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京セラドキュメントソリューションズ株式会社
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Description

  The present invention relates to a sheet feeding apparatus and an image forming apparatus including the sheet feeding apparatus, and in particular, a sheet including a sheet storage cassette having a lift mechanism that lifts and lowers a sheet stacking plate, and a main body gear that transmits driving force to the lift mechanism. The present invention relates to a feeding device and an image forming apparatus including the same.
  A paper feed cassette (sheet storage cassette) is used for feeding cut paper or the like in an image forming apparatus represented by a copying machine or a printer. This paper cassette stocks a large number of sheets before printing in advance and starts from the top layer of the paper stack stacked in the paper cassette by a paper feed roller, a pickup roller, etc. provided in the vicinity of the paper feed cassette. Separate the sheets one by one and supply them.
  Some sheet feeding cassettes are provided with a sheet stacking plate on which sheets are placed. The sheet stacking plate is supported at the upstream end in the sheet feeding direction on the inner side of the bottom surface of the sheet feeding cassette, and is rotatable about the fulcrum as an end on the downstream side in the sheet feeding direction. The paper feed cassette is provided with a lift mechanism that raises and lowers the rotation end of the sheet stacking plate. A driving force is transmitted to the lift mechanism via a main body gear provided in the main body of the image forming apparatus and an input gear provided on a side surface portion of the paper feed cassette.
  An image forming apparatus that transmits a driving force from a main body gear provided in the main body of the image forming apparatus to a lift mechanism of a sheet feeding cassette and rotates the sheet stacking plate by driving the lift mechanism is disclosed in, for example, Patent Document 1. It is disclosed.
JP 2009-40517 A
  By the way, there may be some play (gap) between the main body rail portion of the image forming apparatus main body and the paper feeding cassette so that the paper feeding cassette can be smoothly inserted and removed from the image forming apparatus main body. In this case, when the driving force is transmitted from the main body gear of the image forming apparatus main body to the input gear of the paper feeding cassette, the paper feeding cassette is bent by the force applied to the input gear from the main body gear, and the input gear moves away from the main body gear. It becomes easy to displace in the direction. For this reason, there exists a problem that engagement with a main body gear and an input gear tends to remove | deviate (it is easy to skip a tooth).
  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a sheet feeding device capable of suppressing the occurrence of gear meshing failure and the same. An image forming apparatus is provided.
  In order to achieve the above object, a sheet feeding apparatus according to a first aspect of the present invention is detachable with respect to the apparatus main body, a sheet storage unit that stores a sheet, and a sheet feeding direction in the sheet storage unit A sheet storage cassette having a sheet stacking plate on which an upstream portion is rotatably supported and a sheet is placed on the upper surface, and a lift mechanism for raising and lowering the sheet stacking plate, and a lift mechanism provided in the apparatus main body. The main body gear that transmits the driving force to the main body, the input gear that is disposed on the side surface portion of the sheet storage cassette, engages with the main body gear, and transmits the driving force from the main body gear to the lift mechanism, and the driving force from the input gear. An idle gear that is transmitted to the lift mechanism, a cassette rail portion that is disposed on a side surface of the sheet storage cassette and extends in the attaching / detaching direction of the sheet storage cassette, and a sheet storage cassette provided in the apparatus main body. The cassette rail part is supported from below when attaching and detaching, and the cassette rail part is placed with a gap with respect to the main body rail part with the main body rail part guiding the sheet storage cassette and the sheet storage cassette attached to the main body. As described above, a positioning unit that positions the sheet storage cassette on the apparatus main body and a first abutting unit that projects downward from the cassette rail unit are provided. The first contact portion is disposed at a position on a line extending from the meshing position of the input gear and the idle gear in the direction of the force applied from the input gear to the idle gear, and with the sheet storage cassette mounted on the apparatus main body, It is provided in contact with the main body rail portion.
  According to the sheet feeding device of the first aspect of the present invention, the first contact portion is on a line extending from the meshing position of the input gear and the idle gear in the direction of the force applied from the input gear to the idle gear. The sheet storage cassette is disposed at the position, and is provided so as to contact the main body rail portion in a state where the sheet storage cassette is mounted on the apparatus main body. Accordingly, when the driving force is transmitted from the input gear to the idle gear, the sheet storage cassette can be prevented from being displaced in a direction in which the idle gear moves away from the input gear due to the force applied from the input gear to the idle gear. Therefore, it is possible to suppress the disengagement (tooth skipping) between the input gear and the idle gear.
1 is a cross-sectional view illustrating a structure of an image forming apparatus including a paper feeding device according to an embodiment of the present invention. FIG. 3 is a perspective view illustrating a structure of a portion on the downstream side in the sheet feeding direction of the sheet feeding cassette of the sheet feeding device according to the embodiment of the present invention. FIG. 3 is a perspective view illustrating a sheet feeding cassette of the sheet feeding device according to the embodiment of the present invention from the downstream side in the sheet feeding direction. FIG. 3 is a perspective view illustrating a structure of a portion of a sheet feeding cassette on the downstream side in a sheet feeding direction and a positioning unit periphery of an image forming apparatus main body according to an embodiment of the present invention. FIG. 4 is a side view showing a structure around an input gear of a paper feed cassette of the paper feed device according to the embodiment of the present invention. FIG. 3 is a perspective view illustrating the structure of the sheet stacking plate and the lift mechanism of the sheet feeding cassette of the sheet feeding device according to the embodiment of the present invention, and showing the state where the free end of the sheet stacking plate is positioned at the lowest position. is there. FIG. 3 is a perspective view illustrating the structure of a sheet stacking plate and a lift mechanism of a sheet feeding cassette of the sheet feeding device according to the embodiment of the present invention, and is a diagram illustrating a state where a free end of the sheet stacking plate is lifted by a push-up plate. . It is the side view which showed the structure of the input gear periphery of the paper feeding cassette of the paper feeding apparatus of one Embodiment of this invention, and the figure which showed the state which attached the cover member to the wall part. It is the perspective view which showed the structure around the input gear of the paper feeding cassette of the paper feeding apparatus of one Embodiment of this invention from the downward direction.
  Embodiments of the present invention will be described below with reference to the drawings.
  With reference to FIGS. 1 to 9, an image forming apparatus 100 including a sheet feeding device according to an embodiment of the present invention will be described. Here, a monochrome printer is shown as the image forming apparatus 100. In the main body of the image forming apparatus 100, as shown in FIG. 1, an image forming portion P for forming a monochrome image by each process of charging, exposure, development and transfer is disposed.
  In the image forming unit P, along the rotation direction of the photosensitive drum 1 (counterclockwise direction in FIG. 1), the charging unit 2, the exposure unit 3, the developing device 4, the transfer roller 7, the cleaning device 8, and the static eliminating device. (Not shown) is provided. In the image forming unit P, the image forming process for the photosensitive drum 1 is executed while rotating the photosensitive drum 1 in the counterclockwise direction in FIG.
  A sheet (sheet) 18 is conveyed from the sheet feed cassette (sheet storage cassette) 30 to the image forming unit P on which the toner image is formed via the sheet conveyance path 11 and the registration roller pair 13 at a predetermined timing. In the image forming portion P, the transfer roller 7 transfers the toner image on the surface of the photosensitive drum 1 onto the paper 18. Then, the sheet 18 on which the toner image is transferred is separated from the photosensitive drum 1, conveyed to the fixing unit 9, and heated and pressed to fix the toner image on the sheet 18.
  The paper 18 that has passed through the fixing unit 9 is distributed in the conveyance direction by the branching member 16 of the branching part that branches in a plurality of directions. When an image is formed on only one side of the paper 18, the image is directly discharged to the discharge tray 15 by the discharge roller pair 14.
  On the other hand, when images are formed on both sides of the paper 18, the paper 18 that has passed through the fixing unit 9 is once transported in the direction of the discharge roller pair 14, and after the rear end of the paper 18 passes through the branching member 16, the discharge roller pair 14 is rotated in the reverse direction and the conveyance direction of the branching member 16 is switched, so that the paper 18 is distributed from the rear end of the paper 18 to the reverse conveyance path 17 and re-conveyed to the registration roller pair 13 with the image surface reversed. Then, the next image formed on the photosensitive drum 1 is transferred to the surface of the paper 18 where the image is not formed by the transfer roller 7, transported to the fixing unit 9, and the toner image is fixed. 15 is discharged.
  The paper feed cassette 30 is detachably formed on the image forming apparatus 100 main body. In this image forming apparatus 100, a sheet conveyance path 11 when a sheet is fed from below the main body of the image forming apparatus 100 is located downstream (in the direction of arrow A) in the sheet feeding direction (sheet feeding direction) of the sheet feeding cassette 30. Therefore, the paper feed cassette 30 is pulled out in the left direction (arrow A ′ direction) in FIG. That is, the left direction in FIG. 1 is the drawing direction of the paper feed cassette 30, and the right direction is the mounting direction of the paper feed cassette 30.
  A feeding unit 20 that feeds the paper 18 is provided on the far side (right side in FIG. 1) in the mounting direction of the paper feeding cassette 30. The feeding unit 20 is pressed against the uppermost surface of the paper 18 stacked in the paper feeding cassette 30 and rotates to pick up the paper 18 and to feed the paper 18 sent from the pickup roller 21. 22a. A retard roller 22b is brought into pressure contact with the feed roller 22a, and a transport roller pair 22 is constituted by these two rollers. When a plurality of sheets 18 are simultaneously fed by the pickup roller 21, the sheet 18 is rolled by the conveyance roller pair 22, and only the topmost sheet is fed toward the sheet conveyance path 11.
  FIG. 2 is a perspective view illustrating the structure of the downstream portion of the sheet feeding direction of the sheet feeding cassette 30 of the image forming apparatus 100 according to the embodiment of the present invention. 2 shows a state viewed from the back side of the sheet of FIG. 1, and the drawing direction and mounting direction of the sheet feeding cassette 30 are opposite to those in FIG. In FIG. 2, the paper feed cassette 30 is configured in a flat box shape in which walls 32 a to 32 d (see FIGS. 1 and 2) are erected on the four peripheral edges of the bottom surface 31 and the top surface is open. The sheets 18 are stacked and stored from the direction. The bottom surface 31 and the wall portions 32a to 32d form a paper storage portion (sheet storage portion) S that stores paper.
  As shown in FIG. 3, on the outer side of the wall portion 32a arranged on the downstream side in the mounting direction of the paper feed cassette 30, positioning bosses projecting downstream in the mounting direction on both sides in the paper width direction perpendicular to the paper feeding direction. 32e is provided. Further, as shown in FIG. 4, the image forming apparatus 100 main body is provided with a positioning portion 101 having a positioning hole into which the positioning boss 32e is inserted. Accordingly, when the paper feed cassette 30 is mounted on the main body of the image forming apparatus 100, the positioning boss 32e is inserted into the positioning hole of the positioning unit 101, and the paper feed cassette 30 is positioned. At this time, as shown in FIG. 5, the cassette rail portion 33 described later is arranged with a gap (play) with respect to the main body rail portion 100a, while the second contact portion 38 and the first contact described later. The portion 39 contacts the main body rail portion 100a.
  As shown in FIG. 2, a pair of cassette rail portions 33 are attached to the outside of the wall portions 32b and 32c (side portions) parallel to the mounting direction or the drawing direction (arrow AA ′ direction) of the paper feed cassette 30. Yes. A pair of main body rail portions 100a (see FIG. 5) for slidably guiding the cassette rail portion 33 is provided on the main body side of the image forming apparatus 100, and the cassette rail portion 33 slides along the main body rail portion 100a. By doing so, the paper feed cassette 30 can be inserted into and pulled out from the image forming apparatus 100 main body.
  A sheet stacking plate (sheet stacking plate) 34 is rotatably provided on the bottom surface 31 of the sheet storage unit S. The sheet bundle is stacked on the sheet stacking plate 34. The paper stacking plate 34 and the lift mechanism 40 that raises and lowers the paper stacking plate 34 will be described later.
  Inside the paper feed cassette 30, a pair of width regulation cursors 35 are provided standing along the paper feed direction (arrow A direction). The pair of width regulating cursors 35 can contact and separate from each other in the paper width direction orthogonal to the paper feeding direction, abuts against the side surface of the paper bundle from both sides in the paper width direction, and positions the paper bundle in the width direction.
  A rear end regulating cursor (not shown) is provided on the upstream side in the paper feeding direction inside the paper feeding cassette 30 so as to be movable in the paper feeding direction. A rear end regulating cursor (not shown) abuts on the rear end surface of the sheet bundle from the upstream side in the sheet feeding direction, and positions the sheet bundle in the sheet feeding direction.
  As shown in FIG. 6, the paper stacking plate 34 is supported by a support portion (not shown) provided on the upstream side in the paper feed direction of the side surfaces 32b and 32c with the end on the upstream side in the paper feed direction as a rotation fulcrum 34a. It can be turned up and down with the end on the downstream side in the paper feeding direction as a free end 34b. The paper stacking plate 34 is a plate-like member, and a cutout is provided in the movement area of the width regulating cursor 35 and the trailing edge regulating cursor (not shown).
  In the vicinity of the free end 34 b of the paper stacking plate 34, a rotation shaft portion 41 is disposed. The rotation shaft portion 41 is rotatably held by a bearing portion (not shown) formed on the bottom surface 31 of the paper feed cassette 30. A fixing hole 42a of the push-up plate 42 passes through one end of the rotary shaft portion 41, and the rotary shaft portion 41 and the push-up plate 42 are fixed. The push-up plate 42 is disposed at a position facing the substantially central portion of the back surface of the paper stacking plate 34 in the paper width direction, and lifts and rotates the paper stacking plate 34 from the lower side. Further, a fan-shaped gear (push-up gear) 43 is connected to the other end of the rotation shaft portion 41, and the fan-shaped gear 43 rotates together with the push-up plate 42. The rotating shaft portion 41, the push-up plate 42, and the sector gear 43 constitute a lift mechanism 40.
  The sector gear 43 is connected to the input gear 51 via the idle gear 50. As shown in FIGS. 2 and 5, the input gear 51 is exposed from the paper feed cassette 30, and when the paper feed cassette 30 is inserted into the image forming apparatus 100 main body, the input gear 51 is moved to the image forming apparatus 100 main body side. The main body gear 25 (see FIG. 5) connected to the provided lift motor (drive unit) is engaged. The main body gear 25 and the lift mechanism 40 constitute a sheet feeding device (sheet feeding device).
  When the main body gear 25 rotates with the paper feed cassette 30 inserted into the main body of the image forming apparatus 100, the driving force is transmitted to the rotary shaft portion 41 via the input gear 51, the idle gear 50, and the fan-shaped gear 43. As the push-up plate 42 rotates as shown in FIG. 7, the rotation-side edge 42b of the push-up plate 42 slides along the back surface of the paper stacking plate 34, and the free end 34b of the paper stacking plate 34 lifts. To rise.
  The input gear 51 is supported by the wall portion 32b so as to be displaceable in a direction in which the input gear 51 is in contact with or separated from the main body gear 25. Specifically, as shown in FIG. 8, the input gear 51 is supported by a wall portion 32b and a cover member 36 fixed to the outer surface of the wall portion 32b. Each of the wall portion 32b and the cover member 36 has a long hole 37 in which the shaft portion 51a of the input gear 51 is pivotally supported. The input gear 51 is in contact with and separated from the main body gear 25 and the idle gear 50. It can be displaced in the direction of The elongated hole 37 extends in a direction away from the main body gear 25 while the input gear 51 rotates when the input gear 51 and the main body gear 25 come into contact with each other. Thus, when the paper feed cassette 30 is mounted on the main body of the image forming apparatus 100, if the tooth tip of the input gear 51 comes into contact with the tooth tip of the main body gear 25, the input gear 51 moves along the elongated hole 37 as shown in FIG. , The teeth of the input gear 51 and the main body gear 25 can be prevented from being damaged. Further, when the input gear 51 rotates by obtaining power from the main body gear 25, the input gear 51 is displaced in a direction approaching the main body gear 25 by the rotating force. Unlike the input gear 51, the shaft portion of the idle gear 50 and the shaft portion (rotating shaft portion 41) of the sector gear 43 are supported by a perfectly circular hole and are not displaced vertically and horizontally in FIG.
  The main body gear 25 is rotated in the clockwise direction of FIG. 5 in a state where the paper feed cassette 30 is mounted at a predetermined position of the main body of the image forming apparatus 100, the main body gear 25 is in contact with the input gear 51, and the input gear 51 is moved away. When rotating in the direction, the main body gear 25 and the input gear 51 are engaged with each other, and the input gear 51 moves in the elongated hole 37 in the lower left direction of FIG. 5 to be in the state of FIG. At this time, the main body gear 25 and the input gear 51 mesh at the position P1. At the meshing position P1, the input gear only has a pressure angle (20 degrees here) with respect to a tangent L1 between the pitch circle (not shown) of the main body gear 25 and the pitch circle (not shown) of the input gear 51. Force is transmitted from the main body gear 25 to the input gear 51 in a direction inclined toward the 51 side (a direction in which a line L1a described later extends). Further, the input gear 51 and the idle gear 50 mesh at the position P2. At the meshing position P2, the idle gear is only the pressure angle (here, 20 degrees) of the idle gear 50 with respect to the tangent L2 between the pitch circle (not shown) of the input gear 51 and the pitch circle (not shown) of the idle gear 50. A force is transmitted from the input gear 51 to the idle gear 50 in a direction inclined to the 50 side (a direction in which a line L2a described later extends).
  Here, in the present embodiment, the position on the line L1a extending from the meshing position P1 of the main body gear 25 and the input gear 51 to the direction of the force applied from the main body gear 25 to the input gear 51 at the lower part of the paper feed cassette 30. Is provided with a second abutting portion 38 (see also FIG. 9) protruding downward. The second abutting portion 38 abuts on the main body rail portion 100 a in a state where the paper feed cassette 30 is mounted on the main body of the image forming apparatus 100. In addition, the lower portion of the sheet feeding cassette 30 protrudes downward from a position P2 between the input gear 51 and the idle gear 50 on the line L2a extending in the direction of the force applied from the input gear 51 to the idle gear 50. A first abutting portion 39 (see also FIG. 9) is provided. The first abutting portion 39 abuts on the main body rail portion 100 a in a state where the paper feed cassette 30 is mounted on the main body of the image forming apparatus 100. In FIG. 5, the second contact portion 38 and the first contact portion 39 are hatched for easy understanding.
  In the present embodiment, as described above, the first contact portion 39 is on the line L2a extending from the meshing position P2 between the input gear 51 and the idle gear 50 in the direction of the force applied from the input gear 51 to the idle gear 50. In the state where the paper feed cassette 30 is mounted on the main body of the image forming apparatus 100, it is provided so as to contact the main body rail portion 100a. Thus, when the driving force is transmitted from the input gear 51 to the idle gear 50, the direction in which the paper feed cassette 30 moves away from the input gear 51 by the force applied from the input gear 51 to the idle gear 50 (downward direction). ) Can be suppressed, so that the input gear 51 and the idle gear 50 can be prevented from being disengaged (tooth skipping).
  That is, a gap (play) is provided between the cassette rail portion 33 and the main body rail portion 100a in order to smoothly attach and detach the paper feed cassette 30 to and from the main body of the image forming apparatus 100. However, due to this gap, the sheet feeding cassette 30 may bend due to the force applied from the input gear 51 to the idle gear 50, and tooth skipping may occur. Therefore, in the present embodiment, by providing a contact portion only at a location that greatly affects the deflection of the paper feed cassette 30 due to the meshing of the gears, the paper feed cassette 30 can be secured while ensuring smooth detachability. The occurrence of tooth skipping is suppressed by suppressing the downward bending of.
  Further, as described above, the sheet feeding cassette 30 is placed at the position on the line L1a extending from the meshing position P1 between the main body gear 25 and the input gear 51 in the direction of the force applied from the main body gear 25 to the input gear 51. A second abutting portion 38 that abuts the main body rail portion 100a in a state of being attached to the main body of the forming apparatus 100 is provided. Thereby, when the driving force is transmitted from the main body gear 25 to the input gear 51, the direction in which the input cassette 51 moves away from the main body gear 25 by the force applied from the main body gear 25 to the input gear 51 (downward direction). ) Can be suppressed, so that the engagement between the main body gear 25 and the input gear 51 can be prevented from being disengaged (tooth skipping).
  As described above, the lift mechanism 40 includes the push-up plate 42, the fan-shaped gear 43 that rotates together with the push-up plate 42, and the rotating shaft portion 41 to which the push-up plate 42 and the fan-shaped gear 43 are attached. Accordingly, the sheet stacking plate 34 can be easily raised and lowered by transmitting the driving force from the input gear 51 to the sector gear 43 and rotating the sector gear 43.
  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.
  For example, although an example in which the present invention is applied to a monochrome printer has been shown, the present invention is not limited to this. Needless to say, various image formations including a sheet storage cassette and a main body gear for transmitting a driving force to a lift mechanism of the sheet storage cassette, such as a color printer, a monochrome copying machine, a color copying machine, a digital multifunction peripheral, and a facsimile machine. The present invention can be applied to an apparatus.
18 paper
25 Main body gear 30 Paper feed cassette (sheet storage cassette)
31 Bottom 32b, 32c Wall (side surface)
33 Cassette rail section 34 Paper stacking plate (sheet stacking plate)
38 Second contact portion 39 First contact portion 40 Lift mechanism 41 Rotating shaft portion 42 Push-up plate 43 Fan-shaped gear (push-up gear)
DESCRIPTION OF SYMBOLS 50 Idle gear 51 Input gear 100 Image forming apparatus 100a Main body rail part 101 Positioning part L1a, L2a Line P1, P2 Engagement position S Paper storage part (sheet storage part)

Claims (4)

  1. A sheet storage unit that is detachable from the apparatus main body, stores a sheet, and a sheet stacking unit in which a portion upstream of the sheet feeding direction is rotatably supported by the sheet storage unit, and a sheet is placed on the upper surface A sheet storage cassette having a plate, and a lift mechanism for raising and lowering the sheet stacking plate,
    A body gear that is provided in the apparatus body and transmits a driving force to the lift mechanism;
    An input gear that is disposed on a side surface of the sheet storage cassette, engages with the main body gear, and transmits a driving force from the main body gear to the lift mechanism;
    An idle gear that transmits driving force from the input gear to the lift mechanism;
    A cassette rail portion disposed on a side surface of the sheet storage cassette and extending along an attaching / detaching direction of the sheet storage cassette;
    A main body rail portion that is provided in the apparatus main body, supports the cassette rail portion from below when the sheet storage cassette is attached and detached, and guides the sheet storage cassette;
    A positioning unit that positions the sheet storage cassette on the apparatus main body so that the cassette rail part is disposed with a gap with respect to the main body rail part in a state where the sheet storage cassette is mounted on the apparatus main body. ,
    A first abutting portion protruding downward from the cassette rail portion;
    With
    The first contact portion is disposed at a position on a line extending from a meshing position of the input gear and the idle gear in a direction of a force applied from the input gear to the idle gear, and the sheet storage cassette is disposed in the device. A sheet feeding device, wherein the sheet feeding device is provided so as to contact the main body rail portion in a state of being mounted on the main body.
  2.   In a state where the sheet storage cassette is mounted on the apparatus main body, the main body rail is located on a line extending from the meshing position of the main body gear and the input gear in the direction of the force applied from the main body gear to the input gear. The sheet feeding apparatus according to claim 1, further comprising a second contact portion that contacts the portion.
  3.   The lift mechanism includes a push-up plate that lifts and rotates the sheet stacking plate from the lower side, a push-up gear that is rotated by the driving force transmitted from the input gear, the push-up plate, and the push-up plate The sheet feeding device according to claim 1, further comprising a rotation shaft portion to which a gear is attached.
  4.   An image forming apparatus comprising the sheet feeding device according to claim 1.
JP2016012323A 2016-01-26 2016-01-26 Sheet feeding apparatus and image forming apparatus having the same Active JP6406271B2 (en)

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4078800B2 (en) * 2000-11-20 2008-04-23 村田機械株式会社 Paper feeder
JP4599316B2 (en) * 2006-02-24 2010-12-15 京セラミタ株式会社 Image forming apparatus
US20080012199A1 (en) * 2006-07-14 2008-01-17 Young-Min Kim Paper cassette having manual paper feeder and image forming apparatus including the same
JP5769747B2 (en) * 2013-03-22 2015-08-26 キヤノン株式会社 Sheet feeding apparatus and image forming apparatus
JP5865863B2 (en) * 2013-04-24 2016-02-17 京セラドキュメントソリューションズ株式会社 Sheet feeding apparatus and image forming apparatus provided with the same
JP5978192B2 (en) * 2013-11-13 2016-08-24 京セラドキュメントソリューションズ株式会社 Paper feeding device and image forming apparatus having the same
JP2015101431A (en) * 2013-11-25 2015-06-04 京セラドキュメントソリューションズ株式会社 Sheet storage device and image formation device

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