KR101665974B1 - Apparatus for elevating bottom plate of paper feeding unit in image forming apparatus - Google Patents

Apparatus for elevating bottom plate of paper feeding unit in image forming apparatus Download PDF

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Publication number
KR101665974B1
KR101665974B1 KR1020150115829A KR20150115829A KR101665974B1 KR 101665974 B1 KR101665974 B1 KR 101665974B1 KR 1020150115829 A KR1020150115829 A KR 1020150115829A KR 20150115829 A KR20150115829 A KR 20150115829A KR 101665974 B1 KR101665974 B1 KR 101665974B1
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KR
South Korea
Prior art keywords
plate
curved
shaft
main
stopper
Prior art date
Application number
KR1020150115829A
Other languages
Korean (ko)
Inventor
정성철
Original Assignee
주식회사 신도리코
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Priority to KR1020150115829A priority Critical patent/KR101665974B1/en
Application granted granted Critical
Publication of KR101665974B1 publication Critical patent/KR101665974B1/en

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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6502Supplying of sheet copy material; Cassettes therefor
    • G03G15/6508Automatic supply devices interacting with the rest of the apparatus, e.g. selection of a specific cassette
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6552Means for discharging uncollated sheet copy material, e.g. discharging rollers, exit trays
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/65Apparatus which relate to the handling of copy material
    • G03G15/6555Handling of sheet copy material taking place in a specific part of the copy material feeding path

Abstract

The present invention relates to a cover which is openably and closably provided on one side of a main body. A bottom plate having one end rotatably connected to the cover at an inner side of the cover and the other end elevably connected to both sides of the main body; And a paper feeding roller which is provided on a rotating shaft provided between both side surfaces of the main body and which feeds the paper stacked on the bottom plate, the manual paper feeding unit comprising: A lower plate spring which is lifted from the cover; A bottom plate shaft provided on the other end of the bottom plate in a direction parallel to the rotation axis; A stopper gear provided at one end of the rotary shaft; And stopper means connected to the stopper gear and the bottom plate shaft at one side of the main body to maintain the bottom plate in a lowered state and to raise the bottom plate shaft when the rotation shaft rotates. And a bottom plate lifting device for a manual paper feed unit of the apparatus.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an image forming apparatus,
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a flat plate elevating apparatus for a manual feed unit of an image forming apparatus, and more particularly, to a flat plate elevating apparatus for a manual feed unit of an image forming apparatus in which a bottom plate is lowered when a cover is opened and a bottom plate is raised.
2. Description of the Related Art Conventionally, an image forming apparatus such as a printer, a copying machine, a multifunction apparatus or the like is provided with an automatic paper feed unit mounted inside a main body for feeding paper and a manual paper feed unit provided outside the main body. The automatic paper feed unit is a device that allows standardized paper to be automatically fed, and the manual paper feed unit is a device that allows a user to manually feed a non-standardized paper or special paper.
The automatic paper feed unit and the manual paper feed unit are provided with a drive mechanism for moving the bottom plate (knock-up plate) for supporting the paper. [0005] Japanese Patent Application No. 10-0343154 discloses a printing apparatus comprising a cassette for receiving paper and detachably coupled to a printing apparatus main body, a knock-up plate rotatably installed in the cassette and loaded with paper stacked thereon, A lifter for lifting the knock-up plate to rotate the knock-up plate so that the paper is lifted to the paper feeding position while being rotated by a predetermined driving source; A sensor lever for detecting that the paper is positioned at the paper feeding position by being in contact with the paper stacked on the upper surface of the paper, And a pickup roller that sequentially moves the paper into the main body by rotating the sensor lever Additional weight is installed to be able to flow at predetermined intervals in the vertical direction, discloses a feeder of the printing machine, it characterized in that the additional weight to be in contact with the paper. Here, since the above prior art uses electronic parts such as a sensor lever and a sensor for driving the feed roller by ascending the bottom plate, that is, the knock-up plate and confirming the knock-up plate lifting position, There are disadvantages.
On the other hand, in addition to the expensive apparatuses disclosed in the above-mentioned prior art documents, a low-cost manual paper feeding unit having a lever which can be manually operated by a user to lift and lower the bottom plate has been developed. However, in the case of the manual paper feed unit, since the user has to manually manipulate the lifting and lowering operation of the bottom plate, an inaccurate paper feeding operation can often be performed due to inadvertent lever operation.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an image forming apparatus capable of raising and lowering a bottom plate without using electronic components, And an object of the present invention is to provide a device.
According to an aspect of the present invention, there is provided an electronic device comprising: a cover; A bottom plate having one end rotatably connected to the cover at an inner side of the cover and the other end elevably connected to both sides of the main body; And a paper feeding roller which is provided on a rotating shaft provided between both side surfaces of the main body and which feeds the paper stacked on the bottom plate, the manual paper feeding unit comprising: A lower plate spring which is lifted from the cover; A bottom plate shaft provided on the other end of the bottom plate in a direction parallel to the rotation axis; A stopper gear provided at one end of the rotary shaft; And stopper means connected to the stopper gear and the bottom plate shaft at one side of the main body to maintain the bottom plate in a lowered state and to raise the bottom plate shaft when the rotation shaft rotates.
Here, the stopper means includes: a center shaft provided in a direction parallel to the rotation axis; A curved member formed to be rotatable about the central axis and having one end depressing the bottom plate shaft to lower the bottom plate; An elastic member connected between one side of the curved member and the side fixed portion of the main body; And a gear portion formed on an outer surface of the curved member and engaged with the stopper gear to rotate the curved member when the rotation shaft rotates to elevate the bottom plate shaft.
Preferably, the stopper means further includes a first latching protrusion formed on one side surface of the main body, the first latching protrusion being in contact with the other end of the curved member when the rotation shaft rotates, and regulating a rotation angle of the curved member .
In addition, the stopper means may be formed on one side of the main body, and may further include a second latching protrusion that contacts the one end of the curved member when the rotation shaft rotates, and regulates the rotation angle of the curved member. do.
Preferably, when the cover is closed, the bottom plate shaft pushes the curved member downward, and the elastic member is moved from the center axis to the side surface of the side plate so that the tensile force of the elastic member exceeds the tension of the bottom plate spring. And the bottom plate is kept in a lowered state even if the cover is opened.
Preferably, when the rotation shaft is rotated for operation of the paper feed roller in a state in which the bottom plate is lowered, the curved member is rotated by the stopper gear and the gear portion, And the bottom plate is held in a raised state by the bottom plate spring so that the tensile force of the member does not act on the bottom plate, and is offset from the center axis to the side opposite to the side fixing portion.
On the other hand, an arc-shaped slot for guiding the movement of the bottom plate shaft when the bottom plate is lifted and lowered is formed on a side surface of the main body.
According to the present invention, the bottom plate can be lifted and lowered without using electronic components such as sensors, so that the bottom plate is lifted up at the time of the feeding roller assembly in a cost-effective manner.
1 is a perspective view showing a bottom plate elevating apparatus for a manual paper feed unit of an image forming apparatus according to the present invention,
2 is an enlarged side view of FIG. 1,
3 is a perspective view showing a state in which the bottom plate elevating device for the manual paper feed unit of the image forming apparatus according to the present invention is actuated during feeding,
4 is an enlarged side view of Fig. 3, Fig.
5 is a perspective view showing a state in which a bottom plate is lowered by operating a bottom plate lifting device for a manual paper feed unit of an image forming apparatus according to the present invention when a cover is closed;
6 is an enlarged side view of Fig. 5; Fig.
Hereinafter, a preferred embodiment of a bottom plate lifting device for a manual paper feed unit of an image forming apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the technical scope of the present invention. Will be.
Referring to FIGS. 1 and 2, a bottom plate lifting device for a manual paper feed unit of an image forming apparatus according to the present invention is a device having a structure capable of lifting and lowering a bottom plate without using an electronic component.
First, the manual paper feed unit 10 is a device that allows the user to manually feed paper, and includes a cover 11 that can be opened and closed, a bottom plate 12 that can be raised and lowered, (13). The cover 11 is openably and closably provided on one side (front side or rear side) of the main body of the image forming apparatus. The bottom plate (12) is provided inside the cover (11). One end of the bottom plate 12 is rotatably hinged to one end of the cover 11 and the other end of the bottom plate 12 is vertically connected to both side surfaces 14 and 15 of the main body. The paper feed roller 13 is provided on a rotary shaft 16 disposed between the opposite side surfaces 14 and 15 of the main body and arranged parallel to the cover 11. The paper feed roller 13 rotates and feeds the paper stacked on the bottom plate 12 to the inside of the main body.
The lower plate elevating apparatus for elevating and lowering the bottom plate 12 of the manual paper feeding unit 10 includes a bottom plate spring 110, a bottom plate shaft 120, a stopper gear 130, and stopper means 140.
The bottom spring 110 (see FIG. 4) is provided between the bottom plate 12 and the cover 11 and has a predetermined tensile force to allow the bottom plate 12 to rise from the cover 11.
The bottom plate shaft 120 is provided at the other end of the bottom plate 12 in a direction parallel to the rotation axis 16. The bottom plate shaft 120 is surrounded by a bent portion 12a formed at the other end of the bottom plate 12.
The stopper gear 130 is a gear part provided at one end of the rotary shaft 16 on which the paper feed roller 13 is installed. The stopper gear 130 rotates integrally with the rotary shaft 16 and functions to raise the bottom plate 120 by operating the stopper means described later.
The stopper means 140 is connected to the stopper gear 130 and the bottom plate shaft 120 at one side 14 of the main body and regulates the bottom plate 12 to be kept in a lowered state. The stopper means 140 is operated by the stopper gear 130 to release the pressing force of the bottom plate 12 when the rotary shaft 16 rotates so that the paper feed roller 13 is operated, ).
More specifically, the stopper means 140 includes a central shaft 141 disposed on the side surface 14 of the main body in a direction parallel to the rotating shaft 16, a curved member 142 formed rotatably about the central shaft 141 An elastic member 143 connected between the curved member 142 and one side 14 of the main body and a gear portion 144 engaged with the stopper gear 130 to rotate the curved member 142.
Here, the curved member 142 is a 'C' shaped member as a whole, and one end pushes the bottom plate shaft 120, more precisely the bent portion 12a of the bottom plate 12, so that the bottom plate 12 is lowered. The elastic member 143 is connected between one side of the curved member 142 and the side fixing portion 14a of the main body so that the bottom plate 12 lowered by the curved member 142 can be prevented from being displaced . The gear portion 144 is formed on the outer surface of one end of the curved member 142 and engages with the stopper gear 130 to rotate the curved member 142 when the rotation shaft 16 rotates. When the curved member 142 rotates, the bottom plate 12 is raised by the bottom plate spring 110 while the other end of the curved member 142 adjacent to the side fixing portion 14a moves upward.
The stopper means 140 further includes a first latching protrusion 145 for regulating the rotation angle of the curved member 142. [ The first latching protrusion 145 is formed on the upper side of the side fixing portion 14a on one side 14 of the main body, that is, on the right side of the stopper gear 130 in the figure, And contacts the other end of the curved member 142 which moves upward when the rotary shaft 16 rotates so that the curved member 142 can not be rotated over a certain angle.
In addition, the stopper means 140 further includes a second latching protrusion 146 for regulating the angle of rotation of the curved member 142. The second latching projection 146 is formed on the left side of the stopper gear 130 on one side 14 of the main body and moves downward when the rotation shaft 16 rotates in the reverse direction in accordance with the closing of the cover 11 Shaped member 142 to prevent the curved member 142 from rotating beyond a certain angle.
An arc-shaped slot 17 for guiding the movement of the bottom plate shaft 120 when the bottom plate 12 ascends and descends is formed in the side face 14 of the main body.
5 and 6, when the cover 11 of the manual paper feeding unit 10 is closed, the bottom plate shaft 120 moves downward and contacts the curved member 142, The member 142 is pushed downward. At this time, the elastic member 143 is designed so that the tensile force of the elastic member 143 pulling the curved member 142 toward the side fixing portion 14a exceeds the tension of the bottom plate spring 110 which raises the bottom plate 12 do. 1 and 2, even if the user opens the cover 11, the bottom plate 12 remains lowered by the tensile force of the elastic member 143. Here, when the bottom plate 12 is in the lowered state, the elastic member 143 is in a position shifted from the central axis 141 toward the side surface fixing portion 14a, and can be kept fixed.
1 and 2, when the rotation shaft 16 rotates for the operation of the sheet feeding roller 13, the stopper gear 130 and the gear portion 144 meshed with the stopper gear 130 rotate While rotating the curved member 142 in the counterclockwise direction as shown in Figs. Then, one end of the curved member 142 moves upward, so that the bottom plate 12 is raised by the tensile force of the bottom plate spring 110. At this time, the elastic member 143 is positioned at a position offset from the central axis 141 to the side opposite to the side fixing portion 14a. Therefore, the curved member 142 can be maintained in a fixed state, and the tensile force of the elastic member 143 does not act on the bottom plate 12, so that the bottom plate 12 is kept raised by the bottom plate spring 110 do.
As described above, the bottom plate elevating device for the manual paper feed unit of the image forming apparatus according to the present invention is such that the bottom plate 12 is lowered by the stopper means 140 when the cover 11 is closed, The bottom plate 12 is lowered by the stopper means 140 and the stopper means 140 is released when the feeding roller 13 is driven so that the bottom plate 12 rises.
Therefore, according to the present invention, the bottom plate can be raised and lowered without using an electronic component such as a sensor, so that the bottom plate can be raised at the same time as the feeding roller is cost-effective.
The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It should be interpreted that it is included in the scope of right.
10: Manual feed unit 11: Cover
12: bottom plate 13: feeding roller
14, 15: side surface of the main body 16:
17: Slot 110: Lower plate spring
120: bottom plate shaft 130: stopper gear
140: stopper means 141: center axis
142: Curved member 143: Elastic member
144: gear portion 145: first engaging projection
146: second latching projection

Claims (7)

  1. A cover provided on one side of the main body so as to be openable and closable; A bottom plate having one end rotatably connected to the cover at an inner side of the cover and the other end elevably connected to both sides of the main body; And a paper feed roller which is provided on a rotating shaft provided across both side surfaces of the main body and feeds the paper stacked on the bottom plate, the manual paper feed unit comprising:
    A bottom plate spring installed between the bottom plate and the cover to raise the bottom plate from the cover;
    A bottom plate shaft provided on the other end of the bottom plate in a direction parallel to the rotation axis;
    A stopper gear provided at one end of the rotary shaft; And
    And stopper means connected to the stopper gear and the bottom plate shaft at one side of the main body to maintain the bottom plate in a lowered state and to raise the bottom plate shaft when the rotation shaft rotates. The lower plate lifting and lowering apparatus for the manual paper feed unit.
  2. The method according to claim 1,
    The stopper means,
    A center axis disposed in a direction parallel to the rotation axis;
    A curved member formed to be rotatable about the central axis and having one end depressing the bottom plate shaft to lower the bottom plate;
    An elastic member connected between one side of the curved member and the side fixed portion of the main body; And
    And a gear portion formed on an outer surface of the curved member and engaged with the stopper gear to rotate the curved member when the rotation shaft rotates to thereby raise the bottom plate shaft. Bottom plate lifting device.
  3. 3. The method of claim 2,
    Wherein the stopper means further comprises a first latching protrusion formed on a side surface of the main body and configured to contact the other end of the curved member when the rotation shaft rotates to regulate a rotation angle of the curved member. A lower plate lifting and lowering device for a manual paper feed unit of a forming device.
  4. The method of claim 3,
    Wherein the stopper means further comprises a second latching protrusion formed on one side surface of the main body and adapted to contact the one end of the curved member when the rotation shaft rotates to regulate a rotation angle of the curved member. A lower plate lifting and lowering device for a manual paper feed unit of a forming device.
  5. 3. The method of claim 2,
    When the cover is closed, the bottom plate shaft pushes the curved member downward, and the elastic member is biased toward the side of the side surface fixing portion from the center axis so that the tensile force of the elastic member exceeds the tension of the bottom plate spring. And the bottom plate is kept in a lowered state even if the cover is opened.
  6. 3. The method of claim 2,
    When the rotation shaft is rotated for the operation of the paper feed roller in the state that the bottom plate is lowered, the curved member is rotated by the stopper gear and the gear portion, and the elastic force of the elastic member, Wherein the bottom plate is in a position offset from the central axis to the side opposite to the side fixing portion so as not to act on the bottom plate so that the bottom plate maintains the raised state by the bottom plate spring Lifting device.
  7. 3. The method of claim 2,
    Wherein an arc-shaped slot for guiding the movement of the bottom plate shaft when the bottom plate is lifted and lowered is formed on a side surface of the main body.
KR1020150115829A 2015-08-18 2015-08-18 Apparatus for elevating bottom plate of paper feeding unit in image forming apparatus KR101665974B1 (en)

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KR1020150115829A KR101665974B1 (en) 2015-08-18 2015-08-18 Apparatus for elevating bottom plate of paper feeding unit in image forming apparatus

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08225167A (en) * 1995-02-20 1996-09-03 Canon Inc Sheet feeder and image forming device
JP3728081B2 (en) * 1997-12-26 2005-12-21 キヤノン株式会社 Paper feeding device and image forming apparatus
JP2010008927A (en) * 2008-06-30 2010-01-14 Canon Inc Image forming apparatus
JP2010202379A (en) * 2009-03-05 2010-09-16 Ricoh Co Ltd Paper feeder, image forming device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08225167A (en) * 1995-02-20 1996-09-03 Canon Inc Sheet feeder and image forming device
JP3728081B2 (en) * 1997-12-26 2005-12-21 キヤノン株式会社 Paper feeding device and image forming apparatus
JP2010008927A (en) * 2008-06-30 2010-01-14 Canon Inc Image forming apparatus
JP2010202379A (en) * 2009-03-05 2010-09-16 Ricoh Co Ltd Paper feeder, image forming device

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