CN101041400A - Sheet-feed separation mechanism, sheet feeding device, image reading device, and scanner - Google Patents

Sheet-feed separation mechanism, sheet feeding device, image reading device, and scanner Download PDF

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Publication number
CN101041400A
CN101041400A CNA2007100891241A CN200710089124A CN101041400A CN 101041400 A CN101041400 A CN 101041400A CN A2007100891241 A CNA2007100891241 A CN A2007100891241A CN 200710089124 A CN200710089124 A CN 200710089124A CN 101041400 A CN101041400 A CN 101041400A
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CN
China
Prior art keywords
paper
paper feed
friction pad
feed roller
papers
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Pending
Application number
CNA2007100891241A
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Chinese (zh)
Inventor
穗谷智也
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.)
Kyocera Document Solutions Inc
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Kyocera Mita Corp
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Publication date
Application filed by Kyocera Mita Corp filed Critical Kyocera Mita Corp
Publication of CN101041400A publication Critical patent/CN101041400A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00Separating articles from piles
    • B65H3/46Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52Friction retainers acting on under or rear side of article being separated
    • B65H3/5207Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/5215Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
    • B65H3/5223Retainers of the pad-type, e.g. friction pads

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

The present invention provides a paper feed separator, paper supplying device, image forming device and scanner. A sheet feeding device that draws out a sheet from a pile of sheets, including: a sheet tray on which the pile of sheets is placed; a sheet feeding roller whose peripheral surface is pressed to abut on a top surface of an uppermost sheet in the pile of the sheets at a downstream end in a sheet feeding direction of the pile of sheets; a friction pad disposed oppositely to the sheet feeding roller to form a nip portion for the sheet with the sheet feeding roller; and a pushing member that pushes the friction pad in a direction opposite to the sheet feeding direction.

Description

Paper supply separation device, paper feed, image processing system and scanner
Technical field
The present invention relates to from bundle of papers, more than separate and paper supply separation device, the paper feed of output paper and image processing system and the scanner of using these.
Background technology
All the time, opening flat 4-354740 communique (document 1) or spy as the spy, to drive the disclosed paper supply separation device of 2005-67784 communique (document 2) known.
The paper supply separation device of document 1 is the paper feeding container (paper tray) of image processing systems such as reply duplicator or facsimile unit and the mechanism that is provided with, this mechanism from the bundle of papers of folding and unfolding on paper tray more than output paper and to the image processing system paper supply.This paper supply separation device constitutes by the paper feed roller that drive to rotate around the axle center of sheet transport direction downstream end one side that is disposed at paper tray with at the friction pad of the periphery butt of the bottom of this paper feed roller and this paper feed roller.This paper feed roller and friction pad are made of the bigger material of friction coefficient of rubber etc.Friction pad is pushed the periphery of paper feed roller by the throw-on pressure of spring.
Under the state of the lower circumference face butt of the upper surface of uppermost paper and paper feed roller, the afterburning unit that the bundle of papers of folding and unfolding on paper tray is in by regulation presses upward, and the state that stopped by the friction pad butt of the ora terminalis upper surface of downstream one side.By rotating drive paper feed roller under this state, uppermost paper is guided by the periphery of the bigger paper feed roller of friction coefficient and is extracted out from paper tray, and in image processing system paper supply.
In this paper supply separation device, rotate when paper tray has extracted that for example two pieces of paper are opened out in the driving by paper feed roller, these two pieces of paper are opened the state of the top clamping of the periphery that is in the paper feed roller that is being rotated by driving and friction pad.Under this state, the friction force between not only uppermost paper and second paper is littler than the friction force between the periphery of uppermost paper and paper feed roller, and also littler than the friction force between the upper surface of second paper and friction pad.Therefore, uppermost paper is extracted out by paper feed roller, and on the other hand, and second paper stoped by friction pad and can not be drawn out of.As a result, so-called two paper supplies that two pieces of paper Zhang Yiqi supplies with have been suppressed.
The paper supply separation device of document 2 is the mechanisms that are arranged on the original copy pallet of duplicator or facsimile unit etc., many ground output original copys and to the manuscript reading section paper supply the stacked original copy that many original copys of this mechanism on being positioned in the original copy pallet are laminated.
Also the separation device with document 1 is identical basically for this separation device, constitutes by the paper feed roller that drive to rotate around the axle center on manuscript reading section one side end that is disposed at the original copy pallet with at the friction pad of the periphery butt of the bottom of this paper feed roller and this paper feed roller.Though, be installed on the poppet that constitutes swingably up and down different on this point at friction pad with the technology of the non-oscillatory document 1 of friction pad by preventing two paper supplies of original copy with document 1 identical being used for.
According to the record of document 2, when supplying with original copy, can suppress the vibration of original copy by the friction pad swing, thus, when paper supply,, original copy can disappear because of fine vibrating the so-called trill that causes.
Yet, on the paper separation device of document 1, document 2, each paper occurs and be difficult for peeling off handling edge part at bundle of papers because of the kind of paper or because of cutting a sheet of paper, or under uppermost paper and second the not segregative situation of paper, the problem of two paper supplies takes place when having.
Summary of the invention
The object of the present invention is to provide and a kind ofly can prevent paper supply separation device, the paper feed of two paper supplies and the image processing system of using these effectively.
The paper supply separation device of realizing this purpose the present invention one scheme comprises: paper feed roller, output paper; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
Also have, the paper feed of another program of the present invention is the paper feed of output paper from bundle of papers, comprising: paper tray, mounting bundle of papers; Paper feed roller, in the downstream end of the paper outbound course of described bundle of papers, its periphery is pushed the upper surface of the uppermost paper that is connected to bundle of papers; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
Description of drawings
Figure 1A, 1B are the side sectional views of having used the chopping machine of the paper supply separation device that relates to an embodiment of the present invention, and Figure 1A represents the paper bin folding and unfolding at the locational state of folding and unfolding, and Figure 1B represents that paper bin is retracted to the locational state of extracting out.
Fig. 2 is the block diagram of an embodiment of expression paper feed.
Fig. 3 is the exploded perspective view of an embodiment of expression paper supply separation device.
Fig. 4 is the assembling stereogram of paper supply separation device shown in Figure 3.
Fig. 5 A, 5B are the V-V line cutaway views of Fig. 4, and Fig. 5 A represents that friction pad is positioned at the state on the reference position, and Fig. 5 B represents that friction pad is positioned at the locational state of throw-on pressure that applies.
Fig. 6 A~6E is the instruction diagram that is used to illustrate the effect of paper supply separation device.
The specific embodiment
Figure 1A, 1B are that instruction diagram is analysed and observe in the side of inner structure summary that a routine chopping machine 10 of an embodiment that relates to paper supply separation device of the present invention has been used in expression, Figure 1A represents the state of paper bin 31 folding and unfoldings on the T1 of folding and unfolding position, and Figure 1B represents that paper bin 31 is retracted to the state of extracting out on the T2 of position.In addition, in Figure 1A, 1B, definition Y-Y direction is a fore-and-aft direction, special definition-Y direction be the place ahead ,+the Y direction is the rear.
Chopping machine 10 comprises paper feed 30, and this paper feed 30 constitutes can export many pieces of paper P1 or with manually can paper supply from stored paper P1 folded (bundle of papers P) when storing the paper P1 that uses for printing treatment.Have again, with regard to chopping machine 10, on the position above in apparatus body 11, also leaning on than dividing plate 115 inner be equipped with to the paper P1 that supplies with from paper feed 30 implement image transfer process image forming part 20 and the paper P1 that has implemented transfer process on this image forming part 20 implemented the photographic fixing portion 27 that photographic fixing is handled.The paper P1 that has implemented the photographic fixing processing in photographic fixing portion 27 is to the discharge tray 117 row's paper that are formed at apparatus body 11 tops.
Paper feed 30 (paper feed/first paper feed) possesses relative apparatus body 11 and can insert the manual sheet feed section 38 on the leading section of installing that is used to store the paper bin 31 of bundle of papers P and be arranged at this paper bin 31 with extracting and constitute.On apparatus body 11, with the cooresponding position of upstream one side (the place ahead one side) of paper bin 31 on be provided with the major diameter paper feed roller 311 of more than uppermost paper P1 of ground output from bundle of papers P, and on position directly over this paper feed roller, be provided with minor diameter conveying roller 312.
By the driving of paper feed roller 311, from the paper P1 of paper bin 31 output by means of conveying roller 312 by paper supply transfer passage 313 and a pair of roller 314 that stops that is arranged at its downstream end to image forming part 20 paper supplies.In addition, as for paper bin 31, illustrate separately according to Fig. 2 below.
Image forming part 20 is the image forming parts that are used for according to the graphicinformation that transmits from computing machine etc. paper P1 being carried out transfer process.Image forming part 20 following formation: be provided with photosensitive drums 21 rotationally around the bulging heart that extends at left and right directions (with the direction of the paper quadrature of Fig. 1), along the periphery of this photosensitive drums 21 from this photosensitive drums 21 directly over the position dispose charged device 22, exposure device 23, developing apparatus 24, transfer roll 25 and clean-up device 26 to clockwise direction.
Photosensitive drums 21 is to be used for forming electrostatic latent image and form along the photosensitive drums of the toner image of this electrostatic latent image on periphery.On the periphery of photosensitive drums 21, be laminated with the amorphous silicon layer that is suitable for forming electrostatic latent image and toner image.
Charged device 22 is the charged devices that are used for forming the equivalent electric charge on the periphery of the photosensitive drums 21 of rotating along clockwise direction around the drum heart, in the present embodiment, adopt by the periphery of photosensitive drums 21 being applied the bunch discharge mode of electric charge from the bunch discharge of metal wool.Replace this bunch discharge mode, also can adopt the periphery one side of charged roller and the periphery butt driven rotation on one side of photosensitive drums 21, apply the charged roller mode of electric charge simultaneously to the periphery of this photosensitive drums 21.
Exposure device 23 will have been regulated the periphery irradiation of strong and weak laser to the photosensitive drums 21 of rotating according to the view data that transmits from external devices such as computing machines.Electric charge by the part that laser shone disappears, and electrostatic latent image is formed on the periphery of this photosensitive drums 21.
Developing apparatus 24 makes toner particle attached to the part that is formed with electrostatic development on the periphery by supply with the toner particle in the developer on the periphery of photosensitive drums 21, thus, forms toner image on the periphery of photosensitive drums 21.As developer, for example can adopt the developer of the what is called two composition series that form by toner and carrier.As toner particle, the particle diameter that can adopt the additive that makes colorant, charge control agent and wax etc. to be dispersed in the resin glue is the attritive powder of 6~12 μ m.As carrier, can adopt Armco magnetic iron ore (Fe 3O 4) to wait particle diameter be the magnetic particle of 60~200 μ m.
Transfer roll 25 is transferred on the paper P1 toner image of the positively charged on the periphery that is formed at this photosensitive drums 21 for the paper P1 that is sent to position under the photosensitive drums 21.25 couples of paper P1 of transfer roll apply the negative charge with the opposite polarity of toner image.
Locational paper P1 is implemented transfer process under arriving photosensitive drums 21 when pushing clamping by transfer roll 25 and photosensitive drums 21.This transfer process is with the processing of the toner image on the periphery of positively charged photosensitive drums 21 to the sur-face peeling of electronegative paper P1.
Clean-up device 26 are the devices that are used to remove and purify the toner on the periphery that remains in photosensitive drums 21 after paper P1 is carried out transfer process.The periphery of the photosensitive drums 21 that has been purified by this clean-up device 26 forms and handles and once more towards charged device 22 in order to carry out next time image.
27 pairs in photographic fixing portion has implemented the toner image of the paper P1 of transfer process and has implemented to handle by the photographic fixing of heating in image forming part 20.Photographic fixing portion 27 possesses warm-up mill 271 that inside is equipped with heating power bodies such as halide torch and backer roll 272 in the relative configuration of lower circumference face of this warm-up mill 271.Paper P1 after the transfer process is by the warm-up mill 271 that drive to rotate to clockwise direction around roll centre with around the holding part of roll centre between the backer roll 272 of the driven rotation of anticlockwise direction, thus, obtains implementing photographic fixing and handling from the heat of warm-up mill 271.The paper P1 that has implemented the photographic fixing processing discharges to discharge tray 117 by row's paper transfer passage 273.
Manually sheet feed section 38 possesses antetheca 381 and the manual pallet 382 that is supported on this antetheca 381.Antetheca 381 is made from the guide surface of paper feed roller 311 to image forming part 20 guiding paper P1.
Explain paper feed 30 according to Fig. 2 below.Fig. 2 is the block diagram of an embodiment of expression paper feed 30.In addition, in Fig. 2, definition X-X direction is that left and right directions, Y-Y direction are fore-and-aft direction, special definition-directions X be left ,+directions X be right-hand ,-the Y direction be the place ahead ,+the Y direction is the rear.
Paper feed 30 comprises paper bin 31 and is formed at manual sheet feed section 38 on the front position of this paper bin 31.Paper bin 31 possess circular-arc header board 32 that the front is provided with to foreign side (the place ahead) circular-arc ground bulging under the state of overlooking, from the lower edge portion of the back side (back) side of this circular-arc header board 32 rearward extend the base plate 33 of setting and from the left and right sides of this base plate 33 the outstanding upward pair of side plates 34 of extending at fore-and-aft direction that is provided with and constituting, and the box-shaped of the rectangular shape of opening above under the state of overlooking, being.
On the suitable location of each side plate 34, be provided with to oppositely outstanding each a pair of tab 341 that is directed that is provided with each other.On the other hand, recessedly respectively on the pair of side plates 111 (Figure 1B) of apparatus body 11 be provided with and be directed the tab 341 cooresponding guiding groove 111a that extend at fore-and-aft direction.Be directed tab 341 by these guiding grooves 111a guiding and forward and reverse moving by each, paper bin 31 can be carried out evolution between folding and unfolding position T1 (Figure 1A) folding and unfolding auto levelizer main body 11 in and the extraction position T2 (Figure 1B) that gives prominence to the outside from apparatus body 11.
On base plate 33, middle position on the left and right directions of a surperficial thereon side is provided with what fore-and-aft direction extended and moves forward and backward guiding with recess 331, and is provided with by this and moves forward and backward the front and back position limiting part 35 that guiding guides and can move forward and backward with recess 331.This limiting part 35 is the parts that are used to limit the back-end location of the bundle of papers P (Figure 1A, 1B) that is positioned on the base plate 33, has moving forward and backward the lead horizontal plate 351 of using slip in the recess 331 and the diaphragm plate 352 of erectting setting from the rearward end of this horizontal plate 351.After diaphragm plate 352 moved with being fit to antiquarian, butt stopped at the rear end of bundle of papers P.
Also have, on base plate 33, Biao Mian anterior position is provided with a pair of sway guiding on the left and right directions with recess 332 thereon, and is provided with by this sway guiding and leads with recess 332 and can be at a pair of left and right sides position limit parts 36 that left and right directions moves.These limiting parts 36 are the parts that are used to limit the position, the left and right sides of the bundle of papers P that is positioned on the base plate 33, have guiding with horizontal plate 361 that slides in the recess 332 and the left and right directions from each horizontal plate 361 on the edge part of an opposite each other side erect the diaphragm plate 362 of setting.By making these limiting parts 36 be fit to antiquarian ground mobile phase distance together round about, just can enough a pair of diaphragm plate 362 clamping bundle of papers P.
Therefore, be placed on bundle of papers P on the base plate 33 of paper bin 31 by sandwiching by front and back position limiting part 35 and a pair of left and right sides position limit parts 36, under the front end butt stops at state on the antetheca 381, location in paper bin 31.
Also have, be provided with on the position of the first half of base plate 33 with above-mentioned left and right sides position limit parts 36 hands-off states under the doubler 37 that presses upward of the first half of bundle of papers P of mounting.This doubler 37, is pressed by wind spring 372 rotationally in the axle bearing upward at fulcrum 371 (Figure 1A, 1B) that rear end one side is extended around left and right directions.
Thus, under the state (Figure 1A) of paper bin 31 folding and unfoldings in apparatus body 11, be seated in uppermost paper P1 and paper feed roller 311 butts of the bundle of papers P in the paper bin 31.Therefore, drive rotation by paper feed roller 311, the uppermost paper P1 of bundle of papers P sends to image forming part 20 successively by means of paper feed roller 311, conveying roller 312, paper supply transfer passage 313 and a pair of roller 314 that stops.
In the paper feed 30 that constitutes like this, paper supply separation device 40 of the present invention is arranged on the antetheca 381.According to Fig. 3~Fig. 5 paper supply separation device 40 is described below.Fig. 3 is the exploded perspective view of an embodiment of expression paper supply separation device 40, Fig. 4 is its assembling stereogram, also have, Fig. 5 A, 5B are the V-V line cutaway views of paper supply separation device 40 shown in Figure 4, Fig. 5 A represents that friction pad 70 is positioned at the state on the reference position S1, and Fig. 5 B represents that friction pad 70 is positioned at the state that applies on the S2 of throw-on pressure position.In addition, among Fig. 3~Fig. 5 the situation of the direction indication of X and Y and Fig. 2 identical (X represent left and right directions (X: left ,+X: right-hand), Y represent fore-and-aft direction (Y: the place ahead ,+Y: the rear).
As shown in Figure 3, paper supply separation device 40 possesses: the gantry components (pedestal) 50 that embeds the central position on the left and right directions on the antetheca 381 (Fig. 2) of manual sheet feed section 38; Sheet transport direction can forward and reversely be installed to the advance expenditure support movable member (poppet) 60 on this gantry components 50 movably relatively; Be installed to the friction pad 70 on this advance expenditure support movable member 60; And push and the coil spring 80 that presses to the downstream of sheet transport direction one side for advance expenditure being supportted movable member 60.
Gantry components 50 is set under the state of side-looking and the back of antetheca 381 shape that forwards bends of the first half accordingly.This gantry components 50 possesses: the pair of leg post 51 on the left and right directions; And be erected between the upper edge of this pair of leg post 51 and relatively leg post 51 direction of extending tilt towards the place ahead 30 ° pad maintaining part 52 and constitute.
Pad maintaining part 52 is under paper bin 31 is positioned state on the folding and unfolding position T1 (Figure 1A), and it is relative with the periphery of above-mentioned paper feed roller 311 to be positioned to its surface.Pad maintaining part 52 possesses: front portion, surperficial side direction the place ahead is bevelled surface plate 53 up; Forwardly with the backplate 54 of the approximate vertical of these surface plate 53 relative configurations; Be set up in the pair of side plates 55 on the left and right directions between each ora terminalis of this backplate 54 and surface plate 53 respectively; And be set up in top board 56 between each upper edge of this backplate 54 and surface plate 53, and below be in opening-wide state.Each leg post 51 is provided with downwards from the rear end lower of each side plate 55 with extending.
Be provided with on the surface plate 53 by recess 531 being installed roughly being absorbed in the rectangle that being used to of forming install above-mentioned advance expenditure support movable member 60 on whole.The amount of being absorbed in of recess 531 is installed to be set for slightly darker than the size up and down of advance expenditure support movable member 60 on the whole.Thus, it is outstanding to the outside can recess 531 not to be installed from this under the state of advance expenditure support movable member 60 in being installed on installation recess 531.The bottom panel 532 of this installation recess 531 is parallel with surface plate 53.
On bottom panel 532, on the middle position of left and right directions, be provided with broad ways across the contact opening 533 of this bottom panel 532.This contact opening 533 is to transmit and the opening that is provided with to advance expenditure support movable member 60 for the throw-on pressure of the coil spring 80 of the back side one side that will be installed to bottom panel 532.Also have, be provided with to the ventricose pair of guide rails 534 on the left and right directions that extends on these bottom panel 532 Widths in surface in bulging on the bottom panel 532.These guide rails 534 are to be used to lead the guide rail that moves of the advance expenditures support movable member 60 in the recess 531 is installed.
The width dimensions up and down that recess 531 is installed is set at the roughly twice of the width dimensions of advance expenditure support movable member 60, and side-to-side dimensions is set at longer slightly than the side-to-side dimensions of advance expenditure support movable member 60.Thus, advance expenditure support movable member 60 can be equivalent to distance about self width dimensions sliding on the bottom panel 532 in recess 531 is installed, and adipping is forward and reverse mobile simultaneously.
Near the gantry components 50 of the Gou Chenging position leg post 51 of side plate 55 bottoms has the fulcrum shaft 57 to a reverse side-prominent setting each other like this, and be supported in rotationally on the antetheca 381 (Fig. 2) around this fulcrum shaft 57, and the top of backplate 54 is rearward pushed by the throw-on pressure by pressing spring 58.Thus, gantry components 50 is because of bearing by pressing spring 58 around fulcrum shaft 57 to the anti-clockwise pressing force, and friction pad 70 is pressed and butt stops on the periphery of paper feed roller 311.
Advance expenditure support movable member 60 is the parts that are used to support friction pad 70, carries out the punching press processing bendingly to same direction respectively by a pair of lateral edge portion that makes microscler rectangular metal plate in the present embodiment and forms.This advance expenditure support movable member 60 possess length dimension on the left and right directions be set at than the short slightly base plate 61 of the dead size on the left and right directions of above-mentioned installation recess 531 and from the both sides of the edge portion of this base plate 61 outstanding upward be provided with in the upwardly extending pair of side plates 62 of right and left.The height dimension of above-mentioned each side plate 62 is set for more lower slightly than the amount of being absorbed in of above-mentioned installation recess 531.
On this advance expenditure support movable member 60, on base plate 61, pass and be provided with a pair of groove 611 that is directed, this a pair of groove 611 that is directed is positioned and set size, it is embedded in outward with the moving contact state on the guide rail 534 on the bottom panel 532 that is arranged at gantry components 50.So, be installed in the installation recess 531 by advance expenditure being supportted movable member 60, the a pair of groove 611 that is directed embeds on the pairing separately guide rail 534, thus, with regard to advance expenditure support movable member 60, each is directed groove 611 and can and can moves in that the Width that recess 531 is installed is forward and reverse with stable status by guide rail 534 guiding.
Also have, on this advance expenditure support movable member 60, side plate 62 in the wings is provided with the outstanding prominent sheet 621 of establishing that is provided with of middle position from the left and right directions downwards.In the present embodiment, this prominent established sheet 621 and forms by cutting and erect base plate 61 downwards.
Dashing forward and establishing sheet 621 is the parts that are used for cardinal extremity one side (bottom) of support helix spring 80.In order to make this firm supporting, in the prominent outstanding diameter dimension slice of cylinder 622 slightly littler that be provided with in one side direction the place ahead, front of establishing sheet 621 than the internal diameter of coil spring 80.Be embedded in outward on this slice of cylinder 622 by cardinal extremity one side, prevent that coil spring 80 breaks away from from the prominent sheet 621 of establishing coil spring 80.
Friction pad 70 is in order together to form holding part with clamping paper P1 and prevent two paper supplies of paper P1 thus and the parts that are provided with paper feed roller 311.Friction pad 70 its length dimensions are set for the length dimension of advance expenditure support movable member 60 roughly the same, and width dimensions sets for slightly widelyer than the dead size between the pair of side plates 62 of advance expenditure support movable member 60, and then gauge is set for slightly thicker than the size up and down of the side plate 62 of advance expenditure support movable member 60.
Make friction pad 70 between elasticity of compression distortion on the Width and embedding pair of side plates 62.Friction pad 70 prevents to break away from from advance expenditure support movable member 60 by self elastic force, and is in a surperficial side from the outstanding upward state of the upper edge of each side plate 62 under the state that is installed on the advance expenditure support movable member 60.By being installed in and installing on the recess 531 under this state advance expenditure being supportted movable member 60, the upper surface of friction pad 70 is outstanding a little to the outside from recess 531 is installed.
Friction pad 70 is formed by the elastic body of rubber or soft synthetic resin material etc., and under the state of paper P1 by paper feed roller 311 and friction pad 70 clampings, P1 applies suitable friction force to this paper.Select the material of friction pad 70, make the friction force that is produced between this friction pad 70 and the paper P1 less than the friction force that is produced between paper feed roller 311 and the paper P1.Thus, the paper P1 that is clamped between paper feed roller 311 and the friction pad 70 rotates around the axle center by paper feed roller 311, exports from bundle of papers P with the rotation of this paper feed roller 311.
As the material of friction pad 70, can use for example polyurethane cork, rubber.Also have, can use EPDM (Ethylene propylene dien monomer) as paper feed roller 311.In addition, compare,, just can adopt various elastic bodys as long as friction pad 70 satisfies the little condition of friction force between itself and the paper P1 with paper feed roller 311.
Coil spring 80 is upward and to advance expenditure to support the spring that movable member 60 applies throw-on pressure in order to make friction pad 70 be positioned at reference position S1 by means of advance expenditure support movable member 60.Shown in Fig. 5 A, 5B, this coil spring 80 is under compressive state, be embedded in outside one side's the end on the prominent slice of cylinder 622 of establishing on the sheet 621 that is arranged at advance expenditure support movable member 60, and the opposing party's end butt stops at by on the backplate 54 and top board 56 formed bights in the pad maintaining part 52 of gantry components 50.
Shown in Fig. 5 A, under friction pad 70 was positioned at state on the reference position S1, the throw-on pressure of coil spring 80 was littler than the friction force between paper P1 and the friction pad 70.On the other hand, shown in Fig. 5 B, transfer under the state that applies on the S2 of throw-on pressure position at friction pad 70, the throw-on pressure of coil spring 80 is bigger than the friction force between paper P1 and the friction pad 70.
Under the state that paper feed roller 311 stops, rearward pushing friction pad 70 by advance expenditure support movable member 60 by the throw-on pressure of coil spring 80.Thus, shown in Fig. 5 A, friction pad 70 is positioned on the reference position S1.
To this, be connected at the uppermost paper P1 of bundle of papers P under the state on the periphery of paper feed roller 311,, paper feed roller 311 drives rotation in the counterclockwise direction if being driven around the axle center, then shown in Fig. 5 B, uppermost paper P1 is guided by the rotation of this paper feed roller 311 and is extracted out from bundle of papers P.Then, paper P1 by paper feed roller 311 periphery and the holding part N between the upper surface of friction pad 70.
At this moment, the throw-on pressure of the coil springs 80 of friction pad 70 opposing on one side and on one side compression coil spring 80 forwards tilts up mobilely, become the state that friction force and throw-on pressure resist.Thereby friction pad 70 is no longer mobile, is positioned at the applying on the throw-on pressure position S2 (Fig. 5 B) of throw-on pressure that paper P1 has been applied coil spring 80.
So under this state, paper P1 exports from bundle of papers P.If uppermost paper P1 end of output among the bundle of papers P, then friction pad 70 returns shown in Fig. 5 A on the reference position S1, for the output of ensuing paper P1.
The effect of paper supply separation device 40 is described in further detail according to Fig. 6 A~6E below.Fig. 6 A and Fig. 6 B represent the course of action of the paper supply separation device 40 when bundle of papers P has only exported a uppermost paper P1, and Fig. 6 C~Fig. 6 E represents the course of action of the paper supply separation device 40 when exporting two simultaneously when bundle of papers P has exported two of uppermost paper P1 and the paper P1 of next simultaneously, so-called.In addition, among Fig. 6 A~6E the situation of the direction indication of Y and Fig. 2 identical (Y: the place ahead ,+Y: the rear).
At first, by the throw-on pressure of pressing spring 58 to gantry components 50 to make its around fulcrum shaft 57 to anticlockwise motion press, thereby friction pad 70 thus, forms the holding part N that clamps paper P1 by on the periphery that is pressed in paper feed roller 311 between friction pad 70 and paper feed roller 311.
Drive rotation around the axle center to anticlockwise direction by paper feed roller 311 under this state (friction pad 70 is positioned the state on the reference position S1), the uppermost paper P1 of the bundle of papers P that is pressed upward by doubler 37 is output like that forwards as shown in Figure 6A, and the front end of this paper P1 arrives holding part N.In paper P1 arrival holding part N, friction pad 70 also rests on the reference position S1.
This moment is because paper feed roller 311 continues to drive rotates, and paper P1 is guided by the driving of paper feed roller 311 and continues forwards mobile.At this moment friction pad 70 is guided by the mobile of paper P1, and the throw-on pressure of opposing coil spring 80 and forwards moving obliquely upward in recess 531 is installed is positioned at like that shown in Fig. 6 B and applies on the S2 of throw-on pressure position.
Friction pad 70 under the state that is positioned to apply on the S2 of throw-on pressure position, make be positioned at holding part N paper P1 because of compressive deformation the throw-on pressure of coil spring 80 to rearward return.But because the friction force between friction pad 70 and the paper P1 is littler than the friction force between paper feed roller 311 and the paper P1, therefore, paper P1 is not pushed by friction pad 70 and returns, but forwards extracts out corresponding to the rotation of paper feed roller 311.
Uppermost paper P1 is behind bundle of papers P end of output, stop the rotating drive of paper feed roller 311 for the time being for the output of preparing ensuing paper P1, at this moment friction pad 70 returns to reference position S1 because of the throw-on pressure of coil spring 80 from applying throw-on pressure position S2.Driving by repeating this paper feed roller 311, stop, paper P1 from more than ground of bundle of papers P to image forming part 20 paper supplies.
Rotate the effect that two pieces of paper are opened the friction pad 70 under the situation that P1 exports simultaneously from bundle of papers P according to Fig. 6 C~Fig. 6 E explanation by the driving of paper feed roller 311 below.Shown in Fig. 6 C, rotating two pieces of paper in the driving by paper feed roller 311 opens under the situation that P1 exports simultaneously from bundle of papers P, two pieces of paper are opened P1 (following uppermost paper P1 is called for short paper P11 topmost, and uppermost next paper P1 is called for short next paper P12) and are arrived holding part N simultaneously.
Under this state, continue to drive rotation by paper feed roller 311, friction pad 70 is guided by opening P1 with the two pieces of paper of paper feed roller 311 interlocks rotation, applies on the S2 of throw-on pressure position and move to like that for the time being shown in Fig. 6 D.At this moment, between the top paper P11 and next paper P12, produce static friction.
Yet, because topmost the friction force between paper P11 and the paper feed roller 311 is than topmost the friction force between paper P11 and next the paper P12 is big, and on next paper P12, act on the throw-on pressure at the rear of oriented coil spring 80 with friction force between the two by means of friction pad 70, therefore, open generation slip between the paper P12 at the top paper P11 and next.Thus, between the top paper P11 and next paper P12, produce dynamic friction.
So because dynamic friction coefficient is littler than coefficient of static friction, the throw-on pressure that friction pad 70 can not be resisted coil spring 80 maintains and applies on the S2 of throw-on pressure position.Thus, guided by paper feed roller 311 and forwards continued under the situation of output at the top paper P11, shown in Fig. 6 E, friction pad 70 by the throw-on pressure of coil spring 80 and next paper P12 one in the same way reference position S1 move.
Like this, open P1 and export simultaneously from bundle of papers P even two pieces of paper are rotated in the driving by paper feed roller 311, the friction pad 70 that butt has next paper P12 also shown in Fig. 6 E like that the throw-on pressure by coil spring 80 next is opened paper P12 and rearward pushes open with this.Therefore, can prevent effectively two pieces of paper open P1 by paper feed roller 311 simultaneously to image forming part 20 paper supplies.
In addition, be not limited to export simultaneously the situation that two pieces of paper are opened P1, even under the situation of having exported three above paper P1, same as described above by the effect of the friction pad 70 of throw-on pressure is arranged by coil spring 80 effect, can prevent effectively that plurality of sheets of paper from opening P1 to image forming part 20 paper supplies.
As mentioned above, the paper supply separation device 40 of present embodiment possesses: in the downstream end of the bundle of papers P of mounting on the doubler 37 of paper bin 31, the upper surface of periphery and uppermost paper P1 is pushed the paper feed roller 311 of butt; And with the friction pad 70 of this paper feed roller 311 by this uppermost paper P1 relative configuration in the bottom.Press to the direction opposite by 80 pairs of friction pads 70 of coil spring with sheet transport direction.
Therefore, even exporting plurality of sheets of paper simultaneously from bundle of papers P opens, uppermost paper P1 is also guided and paper supply by the driving rotation of paper feed roller 311, but be accompanied by for the time being from reference position S1 be altered to the friction pad 70 that applies on the S2 of throw-on pressure position by the throw-on pressure of coil spring 80 correcting action S1, second paper P1 rearward pushed and return.Thus, can prevent plurality of sheets of paper effectively and open P1 simultaneously to the such condition of poor of image forming part 20 paper supplies.
Because of the difference of paper P1 kind, the friction force between the paper etc. has nothing in common with each other, thereby suitably the required power of output paper P1 is also different.But in the present embodiment, friction pad 70 move to and paper between the corresponding position of friction force.Therefore, no matter supplied with two which kind of paper, friction pad 70 also move to and paper between on the appropriate location of friction force antagonism, then, together push with next paper because of 70 of coil spring 80 friction pads and to return.That is to say, also can tackle the mutually different various bundle of papers of peeling force between paper.Therefore, can prevent effectively such as generation because of different (i.e. two paper supplies) the such unfavorable conditions that in paper P1 output, go wrong of paper P1 kind.
Also have, drive by paper feed roller 311 under at the paper P1 that from bundle of papers P, exports and to rotate and when mobile, because of paper P1 is absorbed by stretching of coil spring 80 with the vibration that friction pad 70 cliding frictions produce by the state of paper feed roller 311 and friction pad 70 clampings.Therefore, can prevent to sting the generation of the so-called trill of ground vibration effectively because of the thorn that vibrates paper P1 generation.
Also have, in the above-described embodiment, be provided with the advance expenditure support movable member 60 of the state lower support friction pad 70 that exposes on the top that makes friction pad 70, and be provided with the gantry components 50 that keeps this advance expenditure support movable member 60 to sheet transport direction movably.Therefore, friction pad 70 is installed on the gantry components 50 with stable status movably by means of advance expenditure support movable member 60.
In addition, the upper surface in gantry components 50 is recessed on the folding and unfolding recess that is provided with the support of folding and unfolding advance expenditure movably movable member 60.Therefore, make friction pad 70 stable to the installing condition of gantry components 50.
The invention is not restricted to above-mentioned embodiment, also comprise following content.
(1) in the above-described embodiment, be that example is illustrated as the image processing system of using paper supply separation device 40 with chopping machine 10.The present invention can also be applied to duplicator or facsimile unit and read on the scanner etc. of other device transmission of original image backcasting machine etc.Also have, when image processing system is duplicator, except that paper bin 31 (first paper feed), the original copy paper feed (second paper feed) of the original copy paper that the supply graphicinformation is read is set also as paper feed of the present invention.Also have, when image processing system is scanner, paper bin 31 is not set and the original copy paper feed only is set.Additional disclosure once, when image processing system was scanner, the graphicinformation that modulation is read from original copy made it can be transferred to external device such as computing machine and is also included within the notion that image of the present invention forms.
(2) in the above-described embodiment, be that example is illustrated as the paper feed of using paper supply separation device 40 with the paper bin 31 of the transfer paper sheet that is used to store the transfer process image.When image processing system is duplicator or facsimile unit, also can be so-called original copy paper supply tray from original copy to image reading unit that supply with.
(3) in the above-described embodiment, as the afterburning parts illustration that applies throw-on pressure by means of advance expenditure support movable member 60 to friction pad 70 coil spring 80.According to concrete situation, can replace this coil spring to adopt the elastic body of spring plate or rubber etc.When constituting afterburning parts with rubber etc., prepare for example Rubber Parts of oblong, round bar shape, tubulose etc., one of this Rubber Parts distolaterally is installed in prominent establishing on the sheet 621 and with another distolateral being fixed on backplate 54 or the top board 56 and gets final product.Even this afterburning parts also can support movable member 60 to advance expenditure by the elasticity of Rubber Parts and apply suitable throw-on pressure.
(4) in the above-described embodiment, enumerated under friction pad 70 is positioned at state on the reference position S1, the throw-on pressure of coil spring 80 is than the little example of friction force between paper P1 and the friction pad 70.Replace above-mentioned example, the throw-on pressure that also can make coil spring 80 is than also big slightly at the friction force of friction pad 70 between paper P1 under the state of reference position S1 and friction pad 70, and keeping the state that is positioned at reference position S1 in the paper supply process usually, and only when supplying with special paper (paper that friction coefficient is bigger), move to applying throw-on pressure position S2.
(5) in the above-described embodiment, enumerated the example that advance expenditure support movable member 60 forms by the bending metal sheet.Also can replace this metal sheet to use resin formed article.
In addition, in the above-mentioned specific embodiment, mainly comprise invention with following formation.
The paper supply separation device of a scheme of the present invention comprises:
Paper feed roller, output paper; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
The paper feed of another program of the present invention is the paper feed of output paper from bundle of papers, comprising:
Paper tray, the mounting bundle of papers; Paper feed roller, in the downstream end of the paper outbound course of described bundle of papers, its periphery is pushed the upper surface of the uppermost paper that is connected to bundle of papers; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
The image processing system of the another another program of the present invention is based on the image processing system that graphicinformation forms image, comprising: first paper feed, supply with transfer paper sheet; With and/or second paper feed, supply with the original copy paper that graphicinformation is read, wherein,
Any one party or the both sides of described first paper feed and second paper feed comprise: paper tray, the bundle of papers of described transfer paper sheet of mounting or original copy paper; Paper feed roller, in the downstream end of the paper outbound course of described bundle of papers, its periphery is pushed the upper surface of the uppermost paper that is connected to bundle of papers; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
According to this structure, to open even from bundle of papers, export plurality of sheets of paper simultaneously, the uppermost paper in bundle of papers is by the paper feed roller paper supply, and second paper rearward pushed by the friction pad that is applied with throw-on pressure and return simultaneously.And,, therefore, also can tackle the different various bundle of papers of peeling force between paper owing to friction pad moves corresponding to the friction force between the paper.Thus, can prevent plurality of sheets of paper irrespectively, conscientiously with paper type and open the unfavorable condition of while to paper supply place paper supply.
Also have, rotate and when mobile when the paper of exporting from bundle of papers drives by paper feed roller under by the state of paper feed roller and friction pad clamping, the vibration that produces because of this paper and friction pad cliding friction is absorbed by afterburning parts.Therefore, can prevent to sting the generation of the so-called trill of ground vibration conscientiously because of the thorn that the vibration paper produces.
In said structure, preferably possess: poppet, the described friction pad of state lower support that exposes on the top that makes described friction pad; And pedestal, described relatively paper outbound course can forward and reversely keep described poppet movably.According to this structure, friction pad can be installed on the gantry components with stable status movably by means of advance expenditure support movable member.
In this case, the upper surface that is preferably in described pedestal is recessed on the folding and unfolding recess of the described poppet of folding and unfolding movably is set.According to this structure, make friction pad stable to the installing condition of pedestal.
In said structure, described afterburning parts can be any one in coil spring, spring plate and the elastic body.By this structure, can select optimal afterburning parts according to concrete situation.

Claims (16)

1. a paper supply separation device is characterized in that,
Comprise: paper feed roller, output paper; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
2. paper supply separation device according to claim 1 is characterized in that,
Further comprise: poppet, the described friction pad of state lower support that exposes on the top that makes described friction pad; And pedestal, described relatively paper outbound course can forward and reversely keep described poppet movably.
3. paper supply separation device according to claim 2 is characterized in that,
Be recessed at the upper surface of described pedestal and be provided with the folding and unfolding recess of the described poppet of folding and unfolding movably.
4. paper supply separation device according to claim 1 is characterized in that,
Described afterburning parts are any one in coil spring, spring plate and the elastic body.
5. paper feed, output paper from bundle of papers is characterized in that,
Comprise: paper tray, mounting bundle of papers; Paper feed roller, in the downstream end of the paper outbound course of described bundle of papers, its periphery is pushed the upper surface of the uppermost paper that is connected to bundle of papers; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
6. paper feed according to claim 5 is characterized in that,
Further comprise: poppet, the described friction pad of state lower support that exposes on the top that makes described friction pad; And pedestal, described relatively paper outbound course can forward and reversely keep described poppet movably.
7. paper feed according to claim 6 is characterized in that,
Be recessed at the upper surface of described pedestal and be provided with the folding and unfolding recess of the described poppet of folding and unfolding movably.
8. paper feed according to claim 5 is characterized in that,
Described afterburning parts are any one in coil spring, spring plate and the elastic body.
9. an image processing system forms image based on graphicinformation, comprising: first paper feed, supply with transfer paper sheet; With and/or second paper feed, supply with the original copy paper that graphicinformation is read, it is characterized in that,
Any one party or the both sides of described first paper feed and second paper feed comprise: paper tray, the bundle of papers of described transfer paper sheet of mounting or original copy paper; Paper feed roller, in the downstream end of the paper outbound course of described bundle of papers, its periphery is pushed the upper surface of the uppermost paper that is connected to bundle of papers; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
10. image processing system according to claim 9 is characterized in that,
Further comprise: poppet, the described friction pad of state lower support that exposes on the top that makes described friction pad; And pedestal, described relatively paper outbound course can forward and reversely keep described poppet movably.
11. image processing system according to claim 10 is characterized in that,
Be recessed at the upper surface of described pedestal and be provided with the folding and unfolding recess of the described poppet of folding and unfolding movably.
12. image processing system according to claim 9 is characterized in that,
Described afterburning parts are any one in coil spring, spring plate and the elastic body.
13. a scanner comprises: paper feed, supply with the original copy paper that graphicinformation is read, it is characterized in that,
Described paper feed comprises: paper tray, the bundle of papers of mounting original copy paper; Paper feed roller, in the downstream end of the paper outbound course of described bundle of papers, its periphery is pushed the upper surface of the uppermost paper that is connected to bundle of papers; Friction pad, configuration relative with described paper feed roller also together forms the holding part of described paper with described paper feed roller; And afterburning parts, described friction pad is pressed to the direction opposite with described paper outbound course.
14. scanner according to claim 13 is characterized in that,
Further comprise: poppet, the described friction pad of state lower support that exposes on the top that makes described friction pad; And pedestal, described relatively paper outbound course can forward and reversely keep described poppet movably.
15. scanner according to claim 14 is characterized in that,
Be recessed at the upper surface of described pedestal and be provided with the folding and unfolding recess of the described poppet of folding and unfolding movably.
16. scanner according to claim 13 is characterized in that,
Described afterburning parts are any one in coil spring, spring plate and the elastic body.
CNA2007100891241A 2006-03-23 2007-03-19 Sheet-feed separation mechanism, sheet feeding device, image reading device, and scanner Pending CN101041400A (en)

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JP2006080495A JP2007254092A (en) 2006-03-23 2006-03-23 Paper feeding/separating mechanism and image forming device applied with the paper feeding/separating mechanism
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