CN105607447A - A transfer device and an image forming device - Google Patents
A transfer device and an image forming device Download PDFInfo
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- CN105607447A CN105607447A CN201510717460.0A CN201510717460A CN105607447A CN 105607447 A CN105607447 A CN 105607447A CN 201510717460 A CN201510717460 A CN 201510717460A CN 105607447 A CN105607447 A CN 105607447A
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- periphery
- contact
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- carrier
- cam
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
- G03G15/0131—Details of unit for transferring a pattern to a second base
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
- G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
- G03G15/1685—Structure, details of the transfer member, e.g. chemical composition
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Electrophotography Configuration And Component (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
The invention provides a transfer device and an image forming device which can restrain the occurrence impact shaking when the separation amount of an image carrier and a contact component is changed via a first separation and a second separation. The transfer device comprises the contact component (30) and a contact separation mechanism, wherein the contact component and the image carrier (21) form a transfer clamp part for clamping a recording medium P together, and the contact separation mechanism has a rotatable cam component (50) so as to make the image carrier and the contact component engage and disengage. The cam component comprises a first peripheral part (401) arranged on the image carrier side to touch an opposite component to make the separation amount of the image carrier and the contact component the first separation, a second peripheral part (40) not in contact with the opposite component and in contact with the image carrier and the contact component, and a third peripheral part (403) which is located between the first peripheral part and the second peripheral part in the rotating direction of the cam component, is in contact with the opposite component and makes the separation amount the second separation less than the first separation.
Description
Technical field
The present invention relates to transfer device and image processing system.
Background technology
In the past, as the transfer device of image processing system, be well known that being clamped into by image-carrier andOn recording medium in the transfer nip that clamping formation member forms, carry out transfer printing toner image from image-carrier.
In the image processing system of recording at patent documentation 1, be provided with from sensitization as described transfer deviceBody primary transfer is to intermediate transfer belt, and using toner image secondary transfer printing in the paper using of recording mediumSecondary transfer printing device. This secondary transfer printing device includes the secondary transfer roller of joining with intermediate transfer belt front,With with secondary transfer roller in opposite directions and to and the secondary transfer printing opposed roller that joins with the intermediate transfer belt back side. In addition,Described secondary transfer printing device is provided with to have and makes intermediate transfer belt and secondary transfer roller contact and returning of separatingThe contact separation mechanism of rotating cam. Described turning cam has two highly different protuberances on periphery, andConnect each protuberance between and there are two small-bore portions of less diameter, and establish with secondary transfer printing opposed rollerPut on identical axle.
In described secondary transfer printing device, be before paper using enters secondary transfer printing clamping part, first to drive revolution protrudingWheel, and in the time of ground paper by high protuberance, in the time of thin paper, low protuberance is touched on the axle of secondary transfer rollerIn idle roller, with the power that applies of force application spring mutually anti-secondary transfer roller is pushed away downwards. Thus, make twoInferior transfer roll leaves intermediate transfer and brings the separately gap of amount of regulation forming corresponding to paper sheet thickness, and canReduce when paper using enters secondary transfer printing clamping part and impact and rock (Shockjitter). In addition, making paper usingTip enter described gap after, drive at once turning cam to make small-bore portion and idle roller in opposite directionsAnd it is right. In small-bore portion and idle roller in opposite directions and under right state, because small-bore portion and idle roller areNon-contacting, by the power that applies of force application spring, secondary transfer roller is pushed by intermediate transfer belt, just can beEnough transfer pressure of bringing into play secondary transfer printing clamping part suppress the bad generation of transfer printing. In addition, paper using fromWhen secondary transfer printing clamping part is deviate from, be also to drive turning cam to make the protuberance and sky corresponding to paper sheet thicknessTumbler wheel touches, and intermediate transfer belt is separated with secondary transfer roller, leaves two thereby can reduce paper usingImpact when inferior transfer nip is rocked.
Usually, in the time that multipage paper using enterprise forms the continuous printing of image continuously, more is only to adoptThe paper using of same thickness is carried out continuous printing, adopts the paper using of different-thickness to connect but sometimes also haveThe situation of continuous printing. At this moment, if paper using is above different with the thickness of paper using below, when use abovePaper leaves after secondary transfer printing clamping part, and between the paper of the paper using above and paper using below and paper, region is passed throughWhen secondary transfer printing clamping part, will change the described separately amount corresponding to the thickness of paper using below.
But, in described secondary transfer printing device, change idle roller and high protruding at revolution turning camWhen posture that the posture that portion touches and idle roller and low protuberance touch, small-bore portion and idle roller are phasesTo and right posture. Therefore the state, separating from secondary transfer roller and intermediate transfer belt starts to secondary transfer printingOnce after roller contacts with intermediate transfer belt, can again become the shape that secondary transfer roller and intermediate transfer belt separateState. Then, in secondary transfer roller with intermediate transfer belt once contact, if from photoreceptor in intermediate transferBring the primary transfer of carrying out toner image, the intermediate transfer belt that will cause due to the impact in when contact prominentSend out property speed fluctuation and occur impact rock.
[patent documentation 1] (Japan) JP 2010-204259 communique
Summary of the invention
In order to solve above-mentioned problem, technical scheme of the present invention provides a kind of transfer device, and it comprises: contactMember, it forms the transfer nip that sandwiches recording medium together with image-carrier; Contact separation mechanism, itsHave make described image-carrier and the contact of described contact member with separate can rotating cam member, itsBe characterised in that, described cam member includes and is arranged on described image-carrier side and subtend member touches and makesThe separately amount of described image-carrier and described contact member is first periphery at the first interval, and not with instituteState that subtend member touches but the second periphery that described image-carrier contacts with described contact member, Yi JiOn the gyratory directions of described cam member between described the first periphery and described the second periphery and withDescribed subtend member touches and makes described separately amount is the 3rd of second interval less than described the first intervalPeriphery.
Above, according to the present invention, changing image-carrier and contacting structure with the second interval by the first intervalWhen separately the measuring of part, acquisition can suppress to impact the excellent results of rocking generation.
Brief description of the drawings
It shown in Fig. 1, is the cam diragram of the related secondary transfer printing spacing correction of embodiment cam.
It shown in Fig. 2, is the positive summary pie graph of the related image processing system of embodiment.
It shown in Fig. 3, is the positive summary pie graph of the transfer section of the related embodiment of embodiment.
It shown in Fig. 4, is the positive summary pie graph of the transfer section of the related embodiment of embodiment.
It shown in Fig. 5, is the amplification sectional view of surrounding's formation of secondary transfer printing clamping part.
It shown in Fig. 6, is the oblique view of surrounding's formation of secondary transfer printing clamping part.
It shown in Fig. 7, is the cam diragram of the related secondary transfer printing spacing correction of embodiment cam.
It shown in Fig. 8, is make peace the greatly flow process on opportunity of separating action and warming-up exercise of the related contact of embodimentFigure.
Detailed description of the invention
In Fig. 2, the image processing system of laser printer etc. is to pass through optical writing device according to image information1 light beam penetrating forms sub-image on the photoreceptor 2 of revolution driving. The sub-image forming fills by developmentPutting 3 is rasterized as toner image. In the image processing system of polychrome, be mainly by black, magentaThe photoreceptor 2 of look, cyan, yellow use forms toner image of all kinds. Described toner image of all kinds is logicalCross primary transfer device 4 and be transferred to successively with photoreceptor 2 similarly on driven intermediate transfer belt 21,And multi-color toner is looked like to be formed on intermediate transfer belt 21. Multi-color toner picture on intermediate transfer belt 21Be transferred to the use as recording medium of coming by supplying with carrying device 7 conveyances at secondary transfer printing device 106 placesOn paper P. The paper using P that transfer printing has an image is discharged from after by the hot photographic fixing of fixing device 9.
Here, in the time that paper using P protrudes in the secondary transfer printing portion of secondary transfer printing device 106, due to conveyance sideTo conflict power or the impact of reaction force while crossing over the thickness of paper using P, will be at intermediate transfer belt 21Actuating speed in change. In the time having variation in the actuating speed of intermediate transfer belt 21, because oneIn inferior transfer device 4, the relative velocity of photoreceptor 2 and intermediate transfer belt 21 also can change, so will produceRaw transfer printing is rocked, thereby causes the horizontal bar image perpendicular to conveyance direction. Be not only the variation of actuating speed,Even if impact shock is delivered in the primary transfer portion of primary transfer device 4, also can there is transfer printing and rock or turnThe variation of seal rate, thus the horizontal bar image perpendicular to conveyance direction caused. Even paper using P fills from secondary transfer printingWhen 106 the secondary transfer printing portion of putting is left, due to the disappear impact of moment of the thickness of paper using P, also can be onceIn the primary transfer portion of transfer device 4, occur that transfer printing is rocked or transferring rate variation, thereby cause perpendicular to conveyanceThe horizontal bar image of direction.
In Fig. 3, Fig. 4, intermediate transfer belt 21 is shapes of band, and passes through elasticity in secondary transfer printing portionThe secondary transfer printing opposed roller 24 of body carrys out tensioning. Roller unit holder 40 is set to centered by gyroaxis canWith revolution, and be pushed on intermediate transfer belt 21 by transfer pressure spring 45. By protecting with roller unitHold the secondary transfer roller 30 that body 40 is urged together, secondary transfer printing opposed roller 24 is just by transfer pressure spring45 pressing force is extruded distortion, and forms secondary transfer printing clamping part N. Coaxial in secondary transfer roller 30On direction of principal axis two ends be respectively equipped with ball bearing 34 and ball bearing 35 (with reference to Fig. 4), at secondary transfer printingIn opposed roller 24, being provided with in opposite directions secondary transfer printing spacing with ball bearing 34,35 in right position makes corrections protrudingWheel 50,51.
The radius of secondary transfer printing spacing correction cam 50 till from the centre of gyration to profile is along with angle of revolution isThe shape changing. As illustrated in fig. 3, when the radius minimum position court of secondary transfer printing spacing correction cam 50During to ball bearing, secondary transfer printing spacing correction cam 50 and ball bearing 34 separate, and, twoInferior transfer roll 30 and the state of intermediate transfer belt 21 in contacting with the pressing force of regulation. As shown in Figure 4Ground, when the maximum radius location of secondary transfer printing spacing correction cam 50 is during towards ball bearing 34, secondary turnsPrint spacing correction cam 50 and contact with ball bearing 34, and, secondary transfer roller 30 and intermediate transfer belt21 in separate state.
It shown in Fig. 5, is the amplification sectional view of surrounding's formation of secondary transfer printing clamping part. In addition, shown in Fig. 6, beThe stereogram that the surrounding of secondary transfer printing clamping part forms. In these figure, secondary transfer roller 30 includes rollerPortion 31, from the both ends of the surface of the axis direction of roller portion 31 respectively outstanding and in axis of rotation side upwardly extending axleMember 32,33, and ball bearing described later 34,35. In addition, roller portion 31 has hollow cylindraceousPlug 31a, and the elastic layer 31b being formed by the elastomeric material being fixed on its outer peripheral face, and be fixed onSuperficial layer 31c on its outer peripheral face.
Although can illustrate stainless steel, aluminium etc. as the metal that forms hollow plug 31a, not limit toIn this. For elastic layer 31b, taking in JIS-A hardness as 70 ° below for well. But, in roller portionIn 31, because butt has cleaning balde 39, so will cause variety of issue if elastic layer 31b is too soft.Thus, for elastic layer 31b, taking in JIS-A hardness as 40 ° above for well. Certain by bringing into playThe epichlorohydrin rubber of the electric conductivity of degree, forming JIS-A hardness is the elastic layer 31b of 50 ° of left and right.
As the elastomeric material of performance electric conductivity, except the epichlorohydrin rubber of aforesaid electric conductivity, also canUse EPDM or Si rubber after carbon is disperseed, there is NBR, the polyurethane rubber etc. of ionic conduction function.Because a lot of elastomeric materials can be brought into play good chemical affinity for toner, or performance is largerCoefficient of friction, so, be coated with superficial layer 31c on the surface of the elastic layer 31b being formed by rubber. ThusSuppress to adhere to for the toner on roller portion 31 surfaces, or reduce the sliding friction load of scraper plate. AsThe material of superficial layer 31c, preferably at low-friction coefficient and bring into play the fluorine element of good toner release propertyThe resistance that contains carbon or ionic conductive agent etc. in resin is adjusted the material of material.
Secondary transfer roller 30 contacts with intermediate transfer belt 21 while revolution on one side on one side, and between band, has very littleLinear differential. In order not skid because this linear differential makes band, be by the friction system of superficial layer 31cNumber is adjusted at below 0.3. For intermediate transfer belt 21, for image of all kinds is not had to color deviationThe overlapping transfer printing in ground, need to drive with certain speed, therefore, reduces the superficial layer 31c of secondary transfer roller 30Mantle friction impedance very important.
Secondary transfer roller 30 is towards intermediate transfer belt 21 quilts that are hung around on secondary transfer printing opposed roller 24The application of force. The secondary transfer printing opposed roller 24 that extension is wound with intermediate transfer belt 21 has as columned bodyThe 24b of roller portion, and connect in axis of rotation direction with respect to the centre of gyration position of the 24b of roller portion, and makeThe through shaft member 24a that the 24b of roller portion dallies on the surface of self. Through shaft member 24 is made up of metal,And make in its surface the 24b of roller portion freely dally. As the 24b of roller portion of body have drum type inHollow rod 24c, and the elastic layer 24d being formed by the elastomeric material being fixed on its outer peripheral face, and dividedBe not pressed into the ball bearing 24e in the axis direction two ends of hollow plug 24c. Ball bearing 24e is propping upWhen support hollow plug 24c, go back together with hollow plug 24c at through shaft member 24a upper rotary. BulletProperty layer 24d is pressed on the outer peripheral face of hollow plug 24c.
Through shaft member 24a sets up the transfer printing unit side plate 28 of intermediate transfer belt 21 by being fixed on tensioningIn bearing 52 and the bearing 53 that is fixed on 29 li of side plates be supported for free revolution. But,In most of time when print out task, do not turn round driving and stop. Then, on the outer peripheral face of selfMake along with intermediate transfer belt 21 around mobile and will be driven the rotating roller 24b of portion and dally freely.
The elastic layer 24d being fixed on the outer peripheral face of hollow plug 24c is by adding by ionic conductive agentConducting rubber material after Calais's adjusting resistance value forms to bring into play more than 7.5Log Ω resistance.The resistance of elastic layer 24d is adjusted to the reasons are as follows in the scope of regulation. That is to say, using A5When the less recording sheet of the size of the roll axis direction of size etc., wish does not have in secondary transfer printing clamping partRecording sheet across but in the position that directly contacts with roller of band, prevent the concentrated of transfer printing electric current. By making bulletProperty layer 24d resistance be greater than the resistance of recording sheet, just can suppress concentrating of such transfer printing electric current.
In addition, as the conducting rubber material that forms elastic layer 24d, be to adopt bipeltate with performanceAsker-C hardness is the elasticity of 40 ° of left and right. Form elastic layer 24d by this bipeltate, with regard to energyEnough in secondary transfer printing clamping part, make elastic layer 24d flexibly be out of shape at thickness direction, and in sheet material conveyanceIn direction, form the secondary transfer printing clamping part with width to a certain degree.
Further, in this duplicator, as described above, butt cleaning balde 39 in secondary transfer roller 30Time, as the material of the roller portion of secondary transfer roller 30, be just difficult to the material that uses elasticity good. So,What replace secondary transfer roller 30 is to make the 24b of roller portion of secondary transfer printing opposed roller 24 carry out strain.
In the through shaft member 24a of secondary transfer printing opposed roller 24, in long side direction region-wide, beIn the region, both ends not being positioned among the 24b of roller portion, be fixedly installed secondary transfer printing spacing correction cam 50,51. Be exactly to be fixed with secondary in an end regions of the long side direction of through shaft member 24a specificallyTransfer printing spacing correction cam 50. Secondary transfer printing spacing correction cam 50 is by the 50a of turning cam portion and proper circleAfter arranging on axis direction, the 50b of roller portion of shape forms. By connecting the 50b's of roller portionScrew 80 screws togather with through shaft member 24a, and secondary transfer printing spacing correction cam 50 is fixed to through shaftOn member 24a. In addition, in the region, the other end of the long side direction of through shaft member 24a, be fixed withBe the secondary transfer printing spacing correction cam 51 of same formation with secondary transfer printing spacing correction cam 50.
In the axis direction of through shaft member 24a than secondary transfer printing spacing correction cam 51 more in the outer partIn region, be fixed with to drive and accept gear 54. In addition, accept in the more outside of gear 54 solid in this drivingSurely there is detected disk 59.
On the other hand, be fixed with cam drive motor 58 in the side plate 29 of transfer printing unit in, also willInput and output gear unit is fixed as free revolution. Input and output gear unit will with cam drive motor 58Motor gear 57 engagement accept the input gear portion 55 of driving force and be fixed on through shaft memberDriving on 24a is accepted the output gear portion 56 that gear 54 engagement carrys out transmission of drive force and is arranged on axis directionAfter row, form as one. By driving cam CD-ROM drive motor 58, just can make through shaft member 24a revolution. At this moment, though revolution through shaft member 24a, for the 24b of roller portion because can be at through shaft structureIdle running freely on part 24a, so just can not hinder because of band the drive revolution of the 24b of roller portion.
In the time that through shaft member 24a stops turning round in the position, angle of revolution of regulation, secondary transfer printing spacing is mendedProtuberance and the secondary transfer roller 30 of positive cam 50 and secondary transfer printing spacing correction cam 51 are touched, and by twoThe power that applies of inferior transfer roll 30 and transfer pressure spring 45 pushes back mutually anti-ly. Thus, by secondary is turnedPrint roller 30 away from secondary transfer printing opposed roller 24 and then be that the side of intermediate transfer belt 21 moves up, adjustThe axle base of whole secondary transfer printing opposed roller 24 and secondary transfer roller 30.
In such formation, by secondary transfer printing spacing correction cam 50, secondary transfer printing spacing correction cam51, cam drive motor 58, various gear, above-mentioned roller unit holder etc., just formed adjustment secondary and turnedThe distance adjusting mechanism of the axle base of print pair roller 24 and secondary transfer roller 30. Then, as returningThe secondary transfer printing opposed roller 24 of the support revolving body turning, is connecting with respect to the columned roller 24b of portionThrough shaft member 24a on the 24b of roller portion is dallied freely. In the time that through shaft member 24a turns round,Be separately fixed at secondary transfer printing spacing correction cam 50 in the axis direction both ends of through shaft member 24a,51 revolutions integratedly. Therefore, by the drive transmission mechanism for transmit driving on through shaft member 24a onlyBe arranged on the distolateral of axis direction, just can make the turning cam of both end sides turn round respectively. Thus, withIn both end sides, in the past comparing of drive transmission mechanism is set respectively, just can improves the layout of distance adjusting mechanismThe free degree.
In this duplicator, the hollow plug 31a of secondary transfer roller 30 is ground connection, and turns for secondaryThe hollow plug 24c of print pair roller 24 is secondary transfer printing bias voltages that to be applied with toner be identical polar.Thus, in secondary transfer printing clamping part, just between two rollers, formed and made toner relative from secondary transfer printingThe secondary transfer printing electric field of roller 24 side direction secondary transfer roller 30 side electrostatic displacement.
Accept freely to rotate the bearing 52 of the metal through shaft member 24a of secondary transfer printing opposed roller 24To be formed by the sliding bearing of electric conductivity. In the bearing 52 of this electric conductivity, be connected with output secondary transfer printingThe high voltage source 61 of bias voltage. The secondary transfer printing bias voltage of exporting from high voltage source 61 is by means of the bearing of electric conductivityThe 52 directed secondary transfer printing opposed rollers 24 that go. Then, in secondary transfer printing opposed roller 24 successively along goldBelong to through shaft member 24a, metal ball bearing 24e, the metal hollow plug 24c of system and leadElectrical elastic layer 24d transmits.
Be fixed on detected disk 59 the returning at through shaft member 24a of one end of through shaft member 24aAssigned position place in veer has the detected portion 59a holding up on axis direction. On the other hand, existOn the motor support of supporting cam wheel CD-ROM drive motor 58, be fixed with optical pickocff 60. At through shaft member 24aTurning course in, in the time that through shaft member 24a is positioned at the position, angle of revolution of regulation, detected disk 59Detected portion 59a can enter the light-emitting component of optical pickocff 60 and be subject to and interdict both between light original paperBetween light path. The light original paper that is subject to of optical pickocff 60 is subject to coming from the light time of light-emitting component, will be subject to lightSignal is sent to above-mentioned control part. Control part according to come from be subject to light original paper the disappearance that is subject to optical signal timeThe drive volume of machine or the cam drive motor 58 that starts from this opportunity is held and is fixed on through shaft memberThe position, angle of revolution of the protuberance of the secondary transfer printing spacing correction cam 50,51 in 24a.
As described above, secondary transfer printing spacing correction cam 50,51 the position, angle of revolution of regulation withSecondary transfer roller 30 is touched, and with the power that applies of transfer pressure spring 45 mutually anti-by secondary transfer roller 30In the direction of leaving secondary transfer printing opposed roller 24, push back. Below, this is pushed back be called " under push away ". ThisTime the amount of pushing back (hereinafter referred to as " lower pushing volume ") be the protuberance by secondary transfer printing spacing correction cam 50,51Overhang determine. Further, the lower pushing volume of secondary transfer roller 30 is larger, secondary transfer printing opposed roller 24 HesThe axle base of secondary transfer roller 30 is just larger.
In secondary transfer roller 30, with roller portion 31 integratedly 32 li of rotating shaft components be provided with can be emptyThe ball bearing 34 turning. This ball bearing 34 is discoid shapes of cast that external diameter is slightly larger than roller portion 31.Then, itself there is the function of ball bearing, and can on the outer peripheral face of shaft component 32, dally. ?In the shaft component 33 of secondary transfer roller 30, be provided with can dallying of forming same with ball bearing 34Ball bearing 35.
A distolateral secondary transfer printing spacing correction cam 50 that is fixed on through shaft member 24a is in regulationIn position, angle of revolution, with in spring energized direction as with the interlock body of secondary transfer roller 30 interlocksThe face that touched in ball bearing 34 touches mutually. Meanwhile, be fixed on the another of through shaft member 24aOne distolateral secondary transfer printing spacing correction cam 51 with as being touched face in the ball bearing 35 of interlock bodyTouch mutually. The ball axle touching with the secondary transfer printing spacing correction cam 50,51 of secondary transfer printing opposed roller 24Hold 34,35 along with this touches and has hindered its revolution, when the revolution of secondary transfer roller 30 can't be therefore andHindered.
This be because, even if ball bearing 34,35 stops revolution, the shaft component 32 of secondary transfer roller 30,33 also can be independent of ball bearing 34,35 ground turns round freely. Along with protruding with the correction of secondary transfer printing spacingWhile taking turns 50,51 the revolution of touching to stop ball bearing 34,35, avoiding both sliding frictionsGeneration time, can also avoid the band CD-ROM drive motor or the secondary transfer roller 30 that cause because of sliding frictionCD-ROM drive motor moment of torsion rise generation.
What control part was carried out is that processing is moved in pressure below. That is to say, enter at the tip that makes paper using PEnter entering in front opportunity of opportunity before secondary transfer printing clamping part, come by the driving of cam drive motor 58Secondary transfer printing spacing correction cam 50,51 is turned back to the position, angle of revolution of regulation. Then, make twoInferior transfer roll 30 is forced mobile in the direction of leaving intermediate transfer belt 21. Move processing by this pressure,Just can suppress to occur while making recording sheet enter secondary transfer printing clamping part with respect to intermediate transfer belt 21Load sharply rise, and can suppress to impact the generation of rocking. Further, adopt as entering front opportunityBe to 95 opportunitys that recording sheet is started to send towards secondary transfer printing clamping part by contraposition roller.
In addition, control part also carries out pressurized treatment below. That is to say, making the tip of recording sheetAfter just having entered between intermediate transfer belt 21 and secondary transfer roller 30 opportunity just enter rear opportunityIn, make secondary transfer printing spacing correction cam 50,51 be turned back to the position, angle of revolution that is different from afore mentioned rulesIn the position, angle of revolution of putting. Thus, recording sheet is increased the processing of transfer pressure. By thisKind of pressurized treatment, after sheet material just enters, by with enter front opportunity and be in a ratio of increase transfer pressure, justEnough transfer pressure can be in transfer process, obtained, and the bad generation of transfer printing can be suppressed.
For forcing mobile processing, before above-mentioned entering beyond opportunity, can also be in the rear end of recording sheetThe discharge that is about on the opportunity before leaving between intermediate transfer belt 21 and secondary transfer roller 30 is held in opportunity beforeOK. When before being about to discharge, force mobile processing opportunity, because can suppress sheet material rear end and leave timeLoad sharply with respect to intermediate transfer belt 21 declines, and declines so just can suppress this load sharplyThe generation of the image color inequality causing. Further, below, will be about to discharge the pressure of implementing opportunity beforeMobile processing is referred to as reduced pressure treatment especially.
Being the protruding of secondary transfer printing spacing in present embodiment correction cam 50 shown in Fig. 1 and Fig. 7Wheel line chart. Here, by the radius of secondary transfer printing spacing correction cam 50 when maximum and ball bearing 34 connectTouch and the amount of secondary transfer printing spacing G is that maximum position is as the first stop place 401. In addition, by twoThe radius of inferior transfer printing spacing correction cam 50 is that the pressure of hour secondary transfer printing clamping part N is maximum positionPut as the second stop place 402. In addition, the first stop place 401 and the second stop place 402 are logicalCross the shape that the first rake 411 connects smoothly. Since the first stop place 401 towards with firstThe second rake 412 that rake 411 is opposition side has than the little gradient of the first rake 411(slowing down). In addition, in the way of the second rake 412, set the 3rd stop place 403.
The transfer printing amount of separation of the first 401 places, stop place is set to be greater than the maximum of the next paper using P of conveyanceThickness. Then, protrude into the moment in secondary transfer printing portion at paper using P, adjust from the first stop place 401The revolution starting starts opportunity, becomes than the transfer printing amount of separation of the wide 0.1mm of the thickness of paper using P left and right.Charge into that secondary transfer printing portion starts till during image enters into several milliseconds of secondary transfer printing portion from paper using P,Secondary transfer printing spacing correction cam 50 is turned back and forth and is moved to the second stop place 402 by the first rake 411,And prepare first contact action of the clamp position that obtains the required transfer pressure of transfer printing that becomes image.
If paper using P is thicker, transfer printing amount of separation is that the impulsive force of 1 o'clock can be absorbed by paper using P, still,When paper using P is thinner, paper using P is just difficult to absorb described impulsive force. Therefore, occur in secondary transfer printing portionTill impact propagates into the position of primary transfer device 4 through intermediate transfer belt 21, and make from photoreceptor2 images that are transferred on intermediate transfer belt 21 occur flexible. Consequently, turning from intermediate transfer belt 21Print to the horizontal bar image perpendicular to paper using conveyance direction has occurred in the image on paper using P.
On the other hand, in the time that paper using P is thinner, even sentence than transfer printing amount of separation in the first stop place 401Narrow spacing protrudes into paper using P and in secondary transfer printing portion, does not also have problem. In addition, if paper usingTransfer printing amount of separation when P charges into secondary transfer printing portion is narrower, even if slowing down the hodograph that amount of separation is narrowedDuring picture still enters into till secondary transfer printing portion, can move to the required clamp position of transfer printing. Therefore, existIn present embodiment, in the time that paper using P is thinner, be to make secondary transfer printing spacing correction cam 50 with by theThe gyratory directions of two rakes 412 moves.
But, at this moment, carry out returning of secondary transfer printing spacing correction cam 50 since the first stop place 401While turning, just need the time till paper using P protrudes in secondary transfer printing clamping part, thereby before just needing to expandGap between the paper using P of face and paper using P subsequently. So, be at secondary transfer printing spacing correction cam 50The way of the second rake 412 in the 3rd stop place 403 is set and returning by the second rake 412When rotation is done, since the revolution of the 3rd stop place 403 secondary transfer printing spacing correction cams 50. SoAfter, prepare secondary transfer printing spacing correction cam 50 and passed through the second rake 412 from the 3rd stop place 403Being turned back to the second stop place 402 acquisition becomes the clamping shape of the required transfer pressure of transfer printing of imageThe second contact action of state.
In the image processing system of present embodiment, can select the first contact moving according to the kind of paper using PDo and the second contact action, and be set as carrying out the first contact action in the time that thickness is thick paper using P, thickDegree carries out the second contact action during for thin paper using P. Further, this setting can easily be changed by user,And select according to user's hobby. For example, adopt when coated paper tough due to paper as paper using PProperty is rocked compared with by force and easily occurring to impact, so be in the 3rd stop place in the time that paper using P charges into secondary transfer printing portionPut 403 and carry out the second contact action.
In addition, secondary transfer printing spacing correction cam 50 is since the first stop place or the 3rd stop placeRevolution beginning also can be adjusted opportunity, even in the first contact action or the second contact action, also canEnough set suitable amount of separation corresponding to the thickness of various paper using P. If when the thinner revolution of paper using P startsMachine is faster, and the position of charging into due to the paper using in Fig. 1 so can be stopped away from the first stop place 401 or the 3rdStay position 403, paper using P just can be with the amount of paper using P attenuation by amount of separation in the time charging into secondary transfer printing portionBe set as narrower. This setting can easily be changed by user, and according to keeping environment or the system of paper using PMake error etc., even the paper using P of identical type, in the time that thickness changes, also can be according to user's happinessGood adjustment. Further, this setting can be set according to each kind of paper using P, and in phaseIn congener paper using P, be set as identical action.
In the time that paper using P leaves from secondary transfer printing portion, just make secondary transfer printing spacing correction cam 50 fromThe second stop place 402 starts to turn back and forth and move to first stop place 401 through the first rake 411The first separating action. In the time that paper using P is thinner, just make secondary transfer printing spacing correction cam 50 from theTwo stop places 402 start to turn back and forth and move to of the 3rd stop place 403 through the second rake 412Two separating actions.
With contact action similarly, can select the first separating action to separate with second according to the kind of paper using PAction, and be set as carrying out the first separating action in the time that thickness is thick paper using P, be thin paper using at thicknessWhen P, carry out the second separating action. Further, this setting can easily be changed by user, and according to usePerson's hobby is selected. In addition, secondary transfer printing spacing correction cam 50 returning since the second stop placeTurn-off begins also can adjust opportunity, even in the first separating action or the second separating action, also canSet suitable amount of separation corresponding to the thickness of various paper using P. If the thinner revolution of paper using P starts opportunitySlower, the position of leaving due to the paper using in Fig. 7 so can approach the second stop place 402, and paper using P existsWhile leaving secondary transfer printing portion, just can amount of separation be set as narrower with the amount of paper using P attenuation. This setting canEasily to be changed by user, and according to keeping environment or the foozle etc. of paper using P, even identicalThe paper using P of kind, in the time that thickness changes, also can adjust according to user's hobby. Further,This setting can be set according to each kind of paper using P, and is set as in the paper using P of identical typeIdentical action.
In addition, in the present embodiment, opportunity, flow chart was such as shown in Figure 8, and from paper using, P leaves secondaryTransfer section starts to be supplied to next Zhang Lianxu the paper using P that conveyance comes and protrudes in secondary transfer printing clamping part and beOnly, can carry out the first warming-up exercise or the second warming-up exercise. The first warming-up exercise is to make between secondary transfer printingMove to the 3rd stop apart from correction cam 50 from the first stop place 401 through the second rake 412 revolutionsThe action of position 403. The second warming-up exercise is to make secondary transfer printing spacing correction cam 50 from the 3rd stopPosition 403 moves to the action of the first stop place 401 through the second rake 412 revolutions. Thus,Make alternately to be supplied with in the next action of conveyance in the kind of paper using P, also can be to each paper using P'sKind is set best contact action and separating action. In addition, be to and from the first stop place 401 HesWhen two stop places of the 3rd stop place 403, amount of separation at least can be than the 3rd stop place 403Amount of separation is narrow. Therefore, just can not cause because the action between paper using P and the paper using P that conveyance comes continuously existsIntermediate transfer belt 21 applies the horizontal bar image that extra external force occurs, and it is moving to carry out aforesaid preparationDo.
Above explanation is an example, in the present invention's variety of way below, all has distinctive effect.
(mode A)
A transfer device for secondary transfer printing device 106 grades, it comprises the image with intermediate transfer belt 21 gradesCarrier forms the connecing of secondary transfer roller 30 grades of the transfer nip of the recording medium that sandwiches paper using P etc. togetherTouch member, with have make the contact of image-carrier and contact member with separate can rotating secondary transfer printing betweenApart from the cam member of correction cam 50 grades and have with this cam member in opposite directions and right ball bearing 34 etc.The contact separation mechanism of subtend member, cam member includes and is arranged on image-carrier side and subtend memberThe separately amount of touching and make image-carrier and contact member is first stop place 401 at the first interval etc.The first periphery, and does not touch with subtend member but the second stop place that image-carrier contacts with contact memberPut the second periphery of 402 grades, and on the gyratory directions of cam member, be positioned at the first periphery and secondBetween periphery and with subtend member, touching and making the amount of separating is of second interval less than the first intervalThe 3rd periphery of three stop place 403 grades.
In (mode A), subtend member and the second periphery be not in opposite directions and right posture, and can beSubtend member and the first periphery in opposite directions and right posture and subtend member and the 3rd periphery in opposite directions and rightBetween posture, change the posture of cam member. Thus, just can not make separate the image-carrier of rear state and connectOnce touch member contact, and can be by the separately amount of image-carrier and contact member from the first interval between secondEvery switching, or switch to the first interval from the second interval. Thus, cutting with the first interval and the second intervalWhile changing separately the measuring of image-carrier and contact member, can suppress because the contacting of image-carrier and contact memberAnd the generation that the impact that the sudden speed fluctuation of the image-carrier that the impact producing causes causes is rocked.
(mode B)
According to (mode A), described cam member can positive and negatively rotate, and on the periphery of described cam memberBe provided with first the tilting of the first rake 411 etc. that connects described the first periphery and described the second peripheryPortion, and on the gyratory directions of described cam member, be positioned at the first rake side with respect to described the first peripheryOpposition side and connect the first periphery and the second periphery, and there is the gradient less than the first rakeThe second rake of the second rake 412 grades, and, in the way of the second rake, be provided with the described the 3rdPeriphery.
Thus, as the explanation that above-mentioned embodiment is done, because control and one by simpleProtuberance just can be set the stop state of multiple amount of separation and multiple spacing speed, so just can be with lowValency and short time obtain the transfer device after the spacing control optimization of transfer section.
(mode C)
According to (mode B), corresponding to protruding into the opportunity in described transfer nip, recording medium is provided with,Make described cam member be turned back to described second from described the first periphery through described the first rakePeriphery is also sandwiched the first contact action of recording medium by described image-carrier and described contact member; With fromDescribed the 3rd periphery makes described cam member be turned back to described second week through described the second rakeLimit portion is also sandwiched the second contact action of recording medium by described image-carrier and described contact member.
Thus, as the explanation that above-mentioned embodiment is done, protrude into transfer printing clamping at recording mediumIn portion time, just can select best action from two kinds of contact actions.
(mode D)
According to (mode C), described the first contact action and described the second contact action can be according to recording mediumsKind select.
Thus, as the explanation that above-mentioned embodiment is done, according to the kind of recording medium, with regard to energyEnough select best action from two kinds of contact actions.
(mode E)
According to (mode B), (mode C) or (mode D), leave described transfer nip corresponding to recording mediumOpportunity and be provided with, described cam member is returned from described the second periphery through described the first rakeForward described the first periphery to and make that described image-carrier separates with described contact member first separate movingDo; With make described in described cam member is turned back to through described the second rake from described the second peripheryThe 3rd periphery also makes described image-carrier and the second separating action that described contact member separates.
Thus, as the explanation that above-mentioned embodiment is done, when recording medium leaves transfer nipTime, just can select best action from two kinds of contact actions.
(mode F)
According to (mode E), described the first separating action and described the second separating action can be according to recording mediumsKind select.
Thus, as the explanation that above-mentioned embodiment is done, according to the kind of recording medium, with regard to energyEnough select best action from two kinds of separating actions.
(mode G)
According to any one in (mode B) to (mode F), leave described transfer nip from recording mediumStarting to be supplied to the next recording medium of conveyance to next Zhang Lianxu protrudes in described secondary transfer printing clamping partTill opportunity, be provided with from described the first periphery and through described the second rake, described cam member returnedForward the first warming-up exercise of described the 3rd periphery to; With from described the 3rd periphery through described second tiltPortion makes described cam member be turned back to the second warming-up exercise of described the first periphery.
Thus, as the explanation that above-mentioned embodiment is done, it is unnecessary to carry out amount of separationNarrow, periphery when recording medium can be left from transfer nip and the periphery while charging into are set asDifferent peripheries.
(mode H)
According to any one in (mode B) to (mode G), from described the first periphery or described the 3rd weekThe first cam revolution beginning that limit portion starts protrudes in described transfer nip with respect to recording medium opportunityOpportunity can select.
Thus, as the explanation that above-mentioned embodiment is done, just can be corresponding to various recording mediumsThe amount of separation during by the charging into of recording medium in contact action such as thickness or toughness be adjusted into most suitableAmount of separation.
(mode I)
According to (mode H), be can corresponding to the kind of recording medium described first cam revolution beginning opportunitySelect.
Thus, as the explanation that above-mentioned embodiment is done, just can be according to each recording mediumKind, the amount of separation during by the charging into of recording medium in contact action is adjusted into most suitable amount of separation.
(mode J)
According to any one in (mode B) to (mode I), what start from described the second periphery is second protrudingCan select the opportunity that samsara turn-off begins to leave described transfer nip with respect to recording medium opportunity.
Thus, as the explanation that above-mentioned embodiment is done, just can be corresponding to various recording mediumsThe amount of separation when recording medium leaves in separating action such as thickness or toughness be adjusted into most suitableApart from amount.
(mode K)
According to (mode J), be can corresponding to the kind of recording medium described second cam revolution beginning opportunitySelect.
Thus, as the explanation that above-mentioned embodiment is done, just can be according to each recording mediumKind, the amount of separation when recording medium leaves in separating action is adjusted into most suitable amount of separation.
(mode L)
A kind of transfer device, it comprises form the transfer nip that sandwiches recording medium together with image-carrierContact member, and have and can described image-carrier and described contact member be connect rotating cam memberTouch and the contact separation mechanism separating, described cam member can positive and negatively rotate, and includes and be arranged on figureImage carrier side is touched with subtend member and made the amount of separating of described image-carrier and described contact member isFirst periphery at one interval, with do not touch with subtend member but image-carrier contact with contact memberTwo peripheries, and on the gyratory directions of cam member between the first periphery and the second periphery and withSubtend member touches and makes amount is separately the 3rd periphery at second interval less than the first interval, Yi JiyuSubtend member touch and on the gyratory directions of cam member not make image-carrier contact with contact memberOuter peripheral face connect the 4th week limit portion of the first periphery and the 3rd periphery.
Thus, as the explanation that above-mentioned embodiment is done, passing through the first interval and the second intervalWhile changing separately the measuring of image-carrier and contact member, can suppress to impact the generation of rocking.
(mode M)
The image that is formed on image carrier surface is passed through the transfer printing to recording medium by a kind of transfer means that adoptsImage is formed into the image processing system on recording medium, and what adopt as described transfer means is (sideFormula A) to the transfer device described in any one in (mode L).
Thus, as the explanation that above-mentioned embodiment is done, just can not obtain and can occur because of recordImpact when medium is charged into or leaves transfer section and the image processing system of the image disorder that causes.
Claims (13)
1. a transfer device, it comprises:
Contact member, it forms the transfer nip that sandwiches recording medium together with image-carrier;
Contact separation mechanism, it has and makes described image-carrier and the contact of described contact member and the energy separatingEnough rotating cam members,
It is characterized in that, described cam member includes and is arranged on described image-carrier side and subtend member touchesTouching and making the separately amount of described image-carrier and described contact member is first periphery at the first interval, and
Do not touch with described subtend member but second week that described image-carrier contacts with described contact memberLimit portion, and
On the gyratory directions of described cam member, be positioned at described the first periphery and described the second periphery itBetween and to touch with described subtend member and make the described amount of separating be second interval less than described the first intervalThe 3rd periphery.
2. transfer device according to claim 1, is characterized in that described cam member can rotatingMoving, and be provided with on the periphery of described cam member:
The first rake, it connects described the first periphery and described the second periphery;
The second rake, it is positioned on the gyratory directions of described cam member with respect to described the first peripheryThe opposition side of described the first rake side also connects described the first periphery and described the second periphery, and haveThan the little gradient of described the first rake, and,
In the way of described the second rake, be provided with described the 3rd periphery.
3. transfer device according to claim 2, is characterized in that:
Corresponding to protruding into the opportunity in described transfer nip, recording medium is provided with,
Make described in described cam member is turned back to through described the first rake from described the first peripheryThe second periphery is also sandwiched the first contact action of recording medium by described image-carrier and described contact member;With
Make described in described cam member is turned back to through described the second rake from described the 3rd peripheryThe second periphery is also sandwiched the second contact action of recording medium by described image-carrier and described contact member.
4. transfer device according to claim 3, is characterized in that:
Described the first contact action and described the second contact action can be selected according to the kind of recording medium.
5. according to the transfer device described in claim 2,3 or 4, it is characterized in that:
Corresponding to leaving the opportunity of described transfer nip, recording medium is provided with,
Make described in described cam member is turned back to through described the first rake from described the second peripheryThe first periphery also makes described image-carrier and the first separating action that described contact member separates; With
Make described in described cam member is turned back to through described the second rake from described the second peripheryThe 3rd periphery also makes described image-carrier and the second separating action that described contact member separates.
6. transfer device according to claim 5, is characterized in that:
Described the first separating action and described the second separating action can be selected according to the kind of recording medium.
7. according to the transfer device described in any one in claim 2 to 6, it is characterized in that:
Leaving described transfer nip from recording medium starts to be supplied to next Zhang Lianxu the record that conveyance comesMedium is provided with till protruding into the opportunity in described secondary transfer printing clamping part,
Make described in described cam member is turned back to through described the second rake from described the first peripheryThe first warming-up exercise of the 3rd periphery; With
Make described in described cam member is turned back to through described the second rake from described the 3rd peripheryThe second warming-up exercise of the first periphery.
8. according to the transfer device described in any one in claim 2 to 7, it is characterized in that:
The the first cam revolution beginning starting from described the first periphery or described the 3rd periphery is relative opportunityCan select the opportunity protruding in described transfer nip in recording medium.
9. transfer device according to claim 8, is characterized in that:
Described the first cam revolution beginning can be selected corresponding to the kind of recording medium opportunity.
10. according to the transfer device described in any one in claim 2 to 9, it is characterized in that:
Opportunity is left institute with respect to recording medium in the second cam revolution beginning starting from described the second peripheryStating the opportunity of transfer nip can select.
11. transfer devices according to claim 10, is characterized in that:
Described the second cam revolution beginning can be selected corresponding to the kind of recording medium opportunity.
12. 1 kinds of transfer devices, it comprises:
Contact member, it forms the transfer nip that sandwiches recording medium together with image-carrier;
Contact separation mechanism, its have can rotating cam member make described image-carrier with described in connectTouch member contact and separate,
It is characterized in that, described cam member can positive and negatively rotate, and includes and be arranged on described image and carrySide is touched and made the amount of separating of described image-carrier and described contact member with subtend member is between firstEvery the first periphery,
Do not touch with described subtend member but described image-carrier contact with described contact member secondPeriphery,
With on the gyratory directions of described cam member, be positioned at described the first periphery and described the second peripheryBetween and touch with described subtend member and make the described amount of separating be than described the first interval little second betweenEvery the 3rd periphery,
And touch with described subtend member and on the gyratory directions of described cam member with described in not makingImage-carrier is connected described the first periphery and described the 3rd week with the outer peripheral face of described contact member contactThe 4th week limit portion of limit portion.
13. 1 kinds adopt transfer means by the image that is formed on image carrier surface by recording mediumImage is formed into the image processing system on recording medium by transfer printing, it is characterized in that:
What adopt as described transfer means is the transfer device described in any one in claim 1 to 12.
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| JP2014-230908 | 2014-11-13 | ||
| JP2014230908A JP6436383B2 (en) | 2014-11-13 | 2014-11-13 | Transfer device and image forming apparatus |
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| CN105607447B CN105607447B (en) | 2020-04-14 |
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| JP6872160B2 (en) * | 2016-12-09 | 2021-05-19 | 株式会社リコー | Cam drive device and image forming device |
| JP2021140054A (en) | 2020-03-06 | 2021-09-16 | 株式会社リコー | Image forming apparatus |
| JP7269976B2 (en) * | 2021-03-15 | 2023-05-09 | プライムプラネットエナジー＆ソリューションズ株式会社 | Electrode manufacturing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621952A (en) * | 2003-11-26 | 2005-06-01 | 富士施乐株式会社 | Sheet supply/delivery device |
| CN102968033A (en) * | 2011-08-29 | 2013-03-13 | 株式会社理光 | Image forming apparatus |
| JP2013195875A (en) * | 2012-03-22 | 2013-09-30 | Ricoh Co Ltd | Image forming device |
| JP2014026029A (en) * | 2012-07-25 | 2014-02-06 | Ricoh Co Ltd | Image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5966559A (en) * | 1997-09-23 | 1999-10-12 | Eastman Kodak Company | Method and apparatus for sensing and accomodating different thickness paper stocks in an electrostatographic machine |
| JP2007139915A (en) * | 2005-11-15 | 2007-06-07 | Ricoh Co Ltd | Image forming device |
| JP6019965B2 (en) * | 2012-09-10 | 2016-11-02 | 株式会社リコー | Image forming apparatus |
| JP2014071330A (en) * | 2012-09-28 | 2014-04-21 | Ricoh Co Ltd | Transfer device and image forming apparatus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621952A (en) * | 2003-11-26 | 2005-06-01 | 富士施乐株式会社 | Sheet supply/delivery device |
| CN102968033A (en) * | 2011-08-29 | 2013-03-13 | 株式会社理光 | Image forming apparatus |
| JP2013195875A (en) * | 2012-03-22 | 2013-09-30 | Ricoh Co Ltd | Image forming device |
| JP2014026029A (en) * | 2012-07-25 | 2014-02-06 | Ricoh Co Ltd | Image forming apparatus |
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| JP6436383B2 (en) | 2018-12-12 |
| JP2016095376A (en) | 2016-05-26 |
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