US20060033259A1 - Paper storage device, paper feeding device, and printing device comprising paper feeding device - Google Patents

Paper storage device, paper feeding device, and printing device comprising paper feeding device Download PDF

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Publication number
US20060033259A1
US20060033259A1 US11/053,907 US5390705A US2006033259A1 US 20060033259 A1 US20060033259 A1 US 20060033259A1 US 5390705 A US5390705 A US 5390705A US 2006033259 A1 US2006033259 A1 US 2006033259A1
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US
United States
Prior art keywords
side face
paper feeding
paper
face plate
feeding table
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/053,907
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English (en)
Inventor
Akira Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Assigned to FUJITSU LIMITED reassignment FUJITSU LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YAMADA, AKIRA
Publication of US20060033259A1 publication Critical patent/US20060033259A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/14—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising positively-acting mechanical devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/422—Handling piles, sets or stacks of articles
    • B65H2301/4222—Squaring-up piles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the present invention relates to a paper storage device for stacking paper used in a printing device such as a copier, printer, or facsimile which prints alphanumeric characters, images, and so on onto paper, and a paper feeding device for feeding the stacked paper.
  • a printing device such as a copier, printer, or facsimile is provided with a large capacity paper feeding device for supplying the printing device with paper. Paper is stacked in the paper feeding device, and a feeding portion such as a guide roller provided in the printing device supplies one sheet of the paper set on the top of the stack at one time while aligning the position of the paper.
  • a feeding portion such as a guide roller provided in the printing device supplies one sheet of the paper set on the top of the stack at one time while aligning the position of the paper.
  • FIG. 1A is an external view of a copier.
  • a plurality of conventional paper feeding devices 1 is stored in the copier 20 in such a manner that when the paper feeding device 1 needs to be replenished with paper, a user draws the paper feeding device 1 out from the copier 20 .
  • a feeding portion (a guide roller or the like) remains in the interior of the copier 20 .
  • FIG. 1B is a pattern diagram of the paper feeding device 1 in a drawn out state.
  • the paper feeding device 1 has a lift plate 3 onto which paper is stacked, and inner walls 2 a to 2 d disposed so as not to contact the periphery of the lift plate 3 .
  • the lift plate 3 is raised and lowered in a vertical direction 12 by elevating unit not shown in the drawing.
  • the lift plate 3 When paper is placed on the lift plate 3 through an opening portion formed by the upper surface of the paper feeding device 1 and a part of the inner wall 2 d , the lift plate 3 is moved to a position close to a bottom surface 13 by the elevating unit, and when the paper is supplied to the copier 20 via the feeding portion, the lift pate 3 is raised by the elevating unit in accordance with the amount of stacked paper.
  • FIG. 1C is a sectional view of the paper feeding device 1 when stored in the copier, severed along a parallel plane to the xz plane.
  • the paper feeding device 1 When the paper feeding device 1 is drawn out, the user puts paper onto the lift plate 3 through the opening portion.
  • the lift plate 3 rises such that the top sheet of paper on the lift plate 3 contacts the guide roller, and then waits for printing to commence. During printing, the paper is supplied to the copier 20 by the rotation of the guide roller.
  • the inner walls 2 are fixed such that when paper is stacked onto the lift plate, a gap of several millimeters is secured between the inner walls 2 and the periphery of the paper.
  • Japanese Unexamined Patent Application Publication H3-200643 having a member which removes static electricity from a placing table
  • Japanese Unexamined Patent Application Publication S60-40332 including a shutter for protecting human hands during paper feeding, and so on are known in the prior art pertaining to a paper feeding device.
  • the lift plate 3 may stop at a point during the raising operation, and the frictional force may cause the component (wire, belt, etc.) which transmits the motor power to the lift plate to break. Note that during a lowering operation, unlike the raising operation, the load of the weight of the paper alone is sufficient.
  • this object is achieved by providing a paper feeding device which has: a paper feeding table on which a plurality of sheets of paper is stacked; elevating unit which raises and lowers the paper feeding table; a side face plate mechanism which aligns at least one edge of the paper placed on the paper feeding table, disposed so as to be able to move away from the paper feeding table; and side face plate displacing unit which displaces the side face plate mechanism.
  • a printing device including: a paper feeding table on which a plurality of sheets of paper is stacked; elevating unit which raises and lowers the paper feeding table; a side face plate mechanism which aligns at least one edge of the paper placed on the paper feeding table, disposed so as to be able to move away from the paper feeding table; and side face plate displacing unit which displaces the side face plate mechanism.
  • the paper feeding table can be drawn out, and detection unit are provided for detecting an open state of the paper feeding table, in which the paper feeding table is drawn out, and a closed state of the paper feeding table, in which the paper feeding table is stored.
  • the detection unit detects transition from the open state to the closed state, the side face plate displacing unit are controlled to displace the side face plate mechanism, whereupon the elevating unit are controlled.
  • the side face plate mechanism includes a first side face plate and a second side face plate facing the first side face plate across the paper feeding table.
  • the side face plate displacing unit includes a pushing mechanism which pushes the first and second side face plates respectively toward the opposing side face plate when paper is placed on the paper feeding table, thereby causing the first and second side face plates to function as positioning side face plates, and a releasing mechanism which releases the first and second side face plates in the opposite direction to the pushing direction when the elevating unit raise the paper feeding table, thereby moving the first and second side face plates away from the paper feeding table.
  • a lower portion of the first and second side face plates is supported rotatably, the first and second side face plates lean in the opposite direction to the pushing direction, the pushing unit includes crank bars which contact the first and second side face plates respectively to cause the leaning first and second side face plates to stand upright, and the releasing unit includes a crank bar displacement portion which displaces the crank bars, contacting the first and second side face plates respectively, in the opposite direction to the pushing direction.
  • first and second bolt blocks are attached to the respective lower portions of the first and second side face plates.
  • the side face plate displacing unit includes first and second screw shafts engaging with the first and second bolt blocks, a motor to rotate the screw shafts, and transmitting unit which transmits the rotary force of the motor to the screw shafts.
  • the transmitting unit transmits the rotary force of the motor to the first and second screw shafts such that the first and second side face plates approach each other when paper is placed on the paper feeding table, and transmit the rotary force of the motor to the first and second screw shafts such that the first and second side face plates move away from each other when the elevating unit raises the paper feeding table.
  • the side face plates in the interior of the paper feeding device are fixed, and hence misalignment of the edges of the paper when the paper is supplied can be corrected.
  • the side face plates move away from the edges of the paper, thereby easing contact between the paper edges and the side face plates so that the paper feeding table can be raised.
  • FIG. 1A is an external view of a copier
  • FIG. 1B is a pattern diagram of a conventional paper feeding device when drawn out from the copier
  • FIG. 1C is a sectional view of the conventional paper feeding device
  • FIG. 2 is a pattern diagram of a paper feeding device according to an embodiment of the present invention.
  • FIG. 3 is a view illustrating an example of elevating unit in this embodiment
  • FIG. 4A is a sectional view of the paper feeding device when drawn out from a copier
  • FIG. 4B is a sectional view of the paper feeding device when stored in the copier
  • FIG. 5 is a plan view illustrating an operation of a side face plate 4 b in the paper feeding device of this embodiment, FIG. 5A showing a state in which the paper feeding device is drawn out from the copier, and FIG. 5B showing a state in which the paper feeding device is stored in the copier;
  • FIG. 6 is a view illustrating another embodiment of the present invention, FIG. 6A being a pattern diagram thereof, and FIG. 6B being an operational diagram thereof; and
  • FIG. 7 is a block diagram illustrating a printing device according to an embodiment of the present invention.
  • FIG. 2 is a pattern diagram of a paper feeding device 1 according to this embodiment.
  • the paper feeding device 1 of this embodiment may be used in a printing device such as a copier, printer, or facsimile, but is shown here as being drawn out from a copier 20 similar to that shown in FIG. 1 .
  • the paper feeding device of this embodiment includes a side face plate mechanism (having three side face plates in FIG. 2 ) disposed on the inside of the inner walls of the paper feeding device so as to be able to move away from a paper feeding table.
  • the side face plate mechanism When the paper feeding device 1 is drawn out from the printing device, the side face plate mechanism is fixed so as to serve as a positioning member for aligning at least one of the edges of the paper placed on a lift plate.
  • the side face plate mechanism is capable of moving away from the paper feeding table such that the play width between the paper edges and the side face plate mechanism increases, thereby realizing a function for reducing friction when the lift plate is raised.
  • paper is stacked onto a lift plate 3 .
  • the top sheet of paper in the paper feeding device is supplied to the printing device by unit of a feeding portion such as a guide roller (see FIG. 1C ).
  • a feeding portion such as a guide roller (see FIG. 1C ).
  • the paper feeding device 1 is drawn out from the copier, whereas the feeding portion remains in the interior of the copier 20 , and hence the feeding portion is not shown in the drawing.
  • the paper feeding device 1 in FIG. 2 is drawn out in a drawing direction along a retractable drawing rail 5 .
  • a user puts paper onto the lift plate 3 through an opening portion (defined by the upper face of the paper feeding device 1 and a part of an inner wall 2 d ) formed when the paper feeding device 1 is in a drawn out state.
  • movable side face plates 4 a to 4 c are provided on the inside of the inner walls 2 a to 2 c.
  • the side face plate 4 a has a rotatable fulcrum 8 at the lower portion thereof, and if a crank bar 6 is absent, the side face plate 4 a moves toward the inner wall 2 a about the fulcrum 8 .
  • the crank bar 6 is an angled or rod-form member or the like having a C shape (in other words, a transformed E shape made by deleting center one of three horizontal lines of character “E”), which serves to push the side face plate 4 a in the direction of the opposing side face plate 4 c when the side face plate 4 a attempts to move toward the inner wall 2 a while the paper feeding device 1 is drawn out from the printing device (in this case, the copier 20 ).
  • the side face plate 4 a is made to stand upright when the paper feeding device 1 is drawn out, by adjusting the dimension of the crank bar 6 .
  • the side face plate 4 c is pushed in the direction of the opposing side face plate 4 a by a crank bar (on the side face plate 4 c side) not shown in FIG. 2 , and thus made to stand upright.
  • a side face plate 4 b is connected by its lower portion to a bottom face 13 , and is therefore capable of leaning in the direction of the inner wall 2 b .
  • the side face plate 4 b is fixed between the side face plate 4 a and the side face plate 4 c which are pushed in the direction of their respective opposing side face plates.
  • the ends of the side face plate 4 a and side face plate 4 c on the inner wall 2 b side are bent.
  • the side face plate 4 a and side face plate 4 c move toward the inner wall 2 a and the inner wall 2 c respectively, and hence if the ends were not bent, the side face plate 4 b would touch the inner wall 2 b .
  • the side face plate 4 b which is capable of leaning toward the inner wall 2 b side, is supported by the bent part, and therefore does not contact the inner wall 2 b.
  • the position at which the side face plate 4 b stands upright corresponds to the position at which the side face plate 4 a and side face plate 4 c start to bend.
  • the side face plates 4 a to 4 c can be fixed, and used thus as a positioning member for aligning the edges of the paper that is placed on the lift plate 3 .
  • the lift plate (paper feeding table) 3 which is raised and lowered in a vertical direction from the bottom face 13 , is connected to a motor-driven cylinder, gear, belt, wire, or the like, not shown in the drawing, serving as elevating unit for raising and lowering the lift plate 3 .
  • the elevating unit for raising and lowering the lift plate 3 may be of a lifting type that supports and raises the lift plate 3 from below, a hanging type that supports the lift plate 3 from above, or an holding type that supports the lift plate 3 from the side.
  • FIG. 3 is a view illustrating an example of the elevating unit of the lift plate 3 .
  • the lift plate 3 is supported by four wires 36 , one end of each wire being wrapped around a pulley shaft 33 via rollers 35 .
  • the rotary force of a motor 31 is transmitted to a bevel gear 34 via a gear shaft, whereby the bevel gear 34 is driven such that the pulley shaft 33 rotates. This causes the wires 36 to be wound around the pulley shaft 33 .
  • the lift plate 3 is provided with protrusions corresponding to the number of wires for connecting the wires 36 to the lift plate 3 .
  • the wires 36 are stretched in positions between the side face plate 4 a and the inner wall 2 a .
  • grooves designed to prevent interference with the motion of the protrusions are cut into the side face plate 4 a on the left and right sides of the crank bar 6 so that the wires do not catch on the side face plate 4 a when the lift plate 3 moves up and down. Similar grooves are cut into the side face plate 4 c on the left and right sides of the crank bar 7 .
  • FIG. 4A is a sectional view of the paper feeding device 1 when drawn out from the copier 20
  • FIG. 4B is a sectional view of the paper feeding device 1 when stored in the copier 20
  • Both FIG. 4A and FIG. 4B are sectional views showing the paper feeding device severed along a parallel plane to the xz plane (see FIG. 2 ).
  • crank bar 6 (on the opposite side to the side which pushes the side face plate) is connected to a wall face in the interior of the copier 20 , and work as a retractable crank bar displacement portion.
  • the crank bar 7 is an angled or rod-form member or the like which is rotatable about a fulcrum 10 .
  • crank bar displacement portion causes the crank bars 6 , 7 to release the respective inner walls 4 a , 4 c.
  • the wires 36 are stretched in positions between the side face plate 4 a and inner wall 2 a , and the side face plate 4 c and inner wall 2 c *.
  • the wires 36 stretching from the lift plate 3 are led to the roller 35 (see FIG. 3 ) which is not shown in these drawings.
  • the side face plate 4 b will be described.
  • FIG. 5 is a plan view illustrating an operation of the side face plate 4 b in the paper feeding device 1 of this embodiment.
  • FIG. 5A shows a state in which the paper feeding device 1 is drawn out from the copier 20
  • FIG. 5B shows a state in which the paper feeding device 1 is stored in the copier 20 .
  • the side face plate 4 a and side face plate 4 c are standing upright, and hence the side face plate 4 b is fixed between the side face plate 4 a and side face plate 4 c at the bending positions thereof.
  • the side face plate 4 b is also illustrated in an upright state.
  • the area inside the broken line within the region surrounded by the upright side face plates 4 a to 4 c and the inner wall 2 d is a paper placing area 44 in which paper is stacked. In reality, the position of each sheet of paper differs so as to protrude from the broken line.
  • FIG. 5B shows a state in which the side face plate 4 a and side face plate 4 c are leaning, as shown in FIG. 4B , the side face plate 4 a moving in the direction of an arrow 41 and the side face plate 4 c moving in the direction of an arrow 43 .
  • the holding force with which the side face plate 4 b is supported weakens, and hence the side face plate 4 b leans in the direction of the inner wall 2 b , thus moving in the direction of an arrow 42 along the bent parts of the side face plate 4 a and side face plate 4 c .
  • the crank bars 6 , 7 displace the side face plates 4 a , 4 c such that the edges of the paper are moved away from the side face plates 4 a to 4 c in the interior of the paper feeding device.
  • friction between the edges of the paper and the side face plates 4 a to 4 c in the interior of the paper feeding device is greatly reduced, even when the lift plate 3 is raised or lowered, and hence the lift plate can be raised and lowered by a constant force.
  • the friction that is generated between the inner wall 2 d and the paper edge is not sufficient to affect the raising of the lift plate 3 .
  • FIG. 6 is a view illustrating another embodiment of the present invention, wherein the side face plate mechanism is composed of two side face plates.
  • the two side face plates 4 a , 4 c are displaced from the paper feeding table by a motor.
  • FIG. 6A is a pattern diagram thereof
  • FIG. 6B is an operational diagram thereof.
  • the driving force that is generated by the rotation of a motor 51 is transmitted to screw shafts 53 extending to the left and right via a bevel gear 52 , causing the screw shafts 53 to rotate.
  • the bent parts of the side face plates 4 a , 4 c are not shown.
  • Bolt blocks 54 to which either the side face plate 4 a or the side face plate 4 c is fixed are fitted over the screw shafts 53 .
  • the bolt blocks 54 are members which serve as nuts. If a screw can rotate in fixed position, when the screw rotate, a nut fitted over the screw are moved by the rotation of the screw. The same is true for bolt blocks 54 and screw shafts 53 . When the screw shafts 53 rotate, the bolt blocks 54 move, causing the side face plates 4 a , 4 c that are fixed to the bolt blocks 54 to move in parallel.
  • the side face plates 4 a to 4 c can be moved after a predetermined time period following storage of the paper feeding device 1 in the printing device, instead of being moved at the same time as the paper feeding device 1 is stored in the printing device.
  • the motor 51 may also be used in an operation to raise or lower the lift plate.
  • a bevel gear is used as transmitting unit for transmitting the rotary force of the motor to the screw shafts 53 , but this operation may be realized using a wire, a block, a belt, a pulley, or similar.
  • the side face plates 4 a , 4 c are displaced by a side face plate displacement portion, such as the crank bars 6 , 7 or the bolt blocks 54 , for displacing the side face plates, and hence there is no need to take into account the amount of friction between the paper placed on the lift plate 3 and the side face plates.
  • a side face plate displacement portion such as the crank bars 6 , 7 or the bolt blocks 54
  • the force required to raise and lower the lift plate 3 is determined by the weight of the paper, and is therefore substantially constant, enabling raising and lowering operations to be performed with stability.
  • the motor output is modified to an appropriate level, thereby contributing to an improvement in the quality of the paper feeding device and printing device. Since margins such as support shafts for the wires or pulley used as a part of the elevating unit, frame reinforcement, and soon can be held to a minimum, an appropriate cost can be realized.
  • the side face plate mechanism has a plurality of side face plates, and all of the side face plates are moved away from the paper edges.
  • friction can be reduced sufficiently even when at least one of the plurality of side face plates including the side face plate mechanism is moved away from the paper feeding table as the lift plate 3 is raised or lowered, and thus the effect of making the force required to raise the lift plate substantially constant can be realized.
  • the shape of the paper is not limited to a rectangular shape, and the side face plate mechanism may be disposed in alignment with the shape of the paper. Note that similar effects to those of the embodiment described above are achieved when the operating procedure of the side face plates and the lift plate 3 , described in this embodiment, is realized as a method.
  • FIG. 7 is a block diagram of the printing device of this embodiment.
  • the printing device in FIG. 7 includes a control unit 71 for controlling elevating unit 74 and side face plate displacing unit 73 provided in the paper feeding device, and detection unit 72 for detecting whether the paper feeding device is drawn out from or stored in the printing device.
  • the detection unit 72 are realized using an optical sensor or the like, for example, provided in a location that cannot be seen when the paper feeding device is stored but can be seen when the paper feeding device is drawn out.
  • the optical sensor may be disposed at the location of an X mark 75 in FIG. 2 .
  • the detection unit 72 may be realized by other unit.
  • a drawing out state and a stored state can be detected by a switch which switches on and off according to the latch position.
  • control unit 71 displaces the side face plate displacing unit 73 before raising the elevating unit 74 such that the side face plate mechanism is moved away from the paper feeding table, and thus friction generated when the lift plate 3 is raised can be reduced.
  • An identical effect is achieved when the operating procedure executed in the control unit is realized as a program executed in a CPU.

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  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US11/053,907 2004-08-05 2005-02-10 Paper storage device, paper feeding device, and printing device comprising paper feeding device Abandoned US20060033259A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004229437A JP2006044891A (ja) 2004-08-05 2004-08-05 用紙格納装置、給紙装置および給紙装置を備えた印刷装置
JP2004-229437 2004-08-05

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US20060033259A1 true US20060033259A1 (en) 2006-02-16

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US11/053,907 Abandoned US20060033259A1 (en) 2004-08-05 2005-02-10 Paper storage device, paper feeding device, and printing device comprising paper feeding device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070228635A1 (en) * 2006-03-31 2007-10-04 Canon Kabushiki Kaisha Sheet feeding device and image forming apparatus
CN112403956A (zh) * 2020-10-30 2021-02-26 常州嘉业智能装备科技有限公司 一种极板铅膏清理装置
CN114955619A (zh) * 2021-02-18 2022-08-30 宁波盛世阳光自动化科技有限公司 一种进纸台的调节结构及调节方法、进纸装置、压痕机

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070228635A1 (en) * 2006-03-31 2007-10-04 Canon Kabushiki Kaisha Sheet feeding device and image forming apparatus
US7448614B2 (en) * 2006-03-31 2008-11-11 Canon Kabushiki Kaisha Sheet feeding device and image forming apparatus
CN112403956A (zh) * 2020-10-30 2021-02-26 常州嘉业智能装备科技有限公司 一种极板铅膏清理装置
CN114955619A (zh) * 2021-02-18 2022-08-30 宁波盛世阳光自动化科技有限公司 一种进纸台的调节结构及调节方法、进纸装置、压痕机

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Owner name: FUJITSU LIMITED, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YAMADA, AKIRA;REEL/FRAME:016268/0893

Effective date: 20041130

STCB Information on status: application discontinuation

Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION