CN101373365B - Cleaning device, image forming device and image holder unit - Google Patents

Cleaning device, image forming device and image holder unit Download PDF

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Publication number
CN101373365B
CN101373365B CN2008101376628A CN200810137662A CN101373365B CN 101373365 B CN101373365 B CN 101373365B CN 2008101376628 A CN2008101376628 A CN 2008101376628A CN 200810137662 A CN200810137662 A CN 200810137662A CN 101373365 B CN101373365 B CN 101373365B
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China
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mentioned
cleaning part
holder
face
elasticity
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CN2008101376628A
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Chinese (zh)
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CN101373365A (en
Inventor
小笠原正
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Fujifilm Business Innovation Corp
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Fuji Xerox Co Ltd
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Publication of CN101373365A publication Critical patent/CN101373365A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0011—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a blade; Details of cleaning blades, e.g. blade shape, layer forming
    • G03G21/0017—Details relating to the internal structure or chemical composition of the blades
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/007—Arrangement or disposition of parts of the cleaning unit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0167—Apparatus for electrophotographic processes for producing multicoloured copies single electrographic recording member
    • G03G2215/0174—Apparatus for electrophotographic processes for producing multicoloured copies single electrographic recording member plural rotations of recording member to produce multicoloured copy
    • G03G2215/0177—Rotating set of developing units
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/0005—Cleaning of residual toner
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
    • G03G2221/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements and complete machine concepts
    • G03G2221/18—Cartridge systems
    • G03G2221/183—Process cartridge

Abstract

The invention provides a cleaning device used for cleaning the flexible cleaning component on the surface of the maintaining body, an imaging device with the cleaning device and image maintaining body unit. The cleaning device comprises an image maintaining body (16) for maintaining the images and a flexible cleaning component (60) cleaning the surface; and the supporting components (70) for multiple surfaces for the supporting flexible cleaning component (60); the flexible cleaning component (60) has: a first surface (64A) more closer than the upper river side of the rotating direction than the edge portion (65) of the image maintaining body (16); a second surface (64B) more closer than the lower river side of the rotating direction than the edge portion (65) of the image maintaining body (16); a third surface (64C) adjacent to the first surface (64A) opposite to the second surface (64B); furthermore, the cleaning device (28) and the imaging device (10) and the image maintaining body unit (27) are formed.

Description

Cleaning device, imaging device and picture holder unit
Technical field
The present invention relates to cleaning device, imaging device and picture holder unit.
Background technology
Take duplicating machine and laser printer in the ordinary electronic photographic-type imaging device of representative, for example, will be formed on recording mediums such as being transferred in paper used for recording as the toner image on the photographic layer on holder surface via middle transfer body.Then, utilize cleaning device not to be transferred and remaining in removing as the lip-deep transfer printing residual toner of holder.
As cleaning device, known have following such mode: the surface that is crimped on the picture holder by the cleaning balde with rubber system, thereby remnants are removed (for example, with reference to TOHKEMY 2007-47400 communique) in this transfer printing residual toner as the holder surface.This cleaning mode based on cleaning balde, simple structure, small-sized and cost is low, clean-up performance and reliability etc. are superior, therefore are practical the most widely from the low speed processor to the high speed processor in recent years.
Summary of the invention
The object of the invention is to obtain be used for being difficult on the elasticity cleaning part of cleaning as the holder surface produce turnup and damaged cleaning device, the imaging device with this cleaning device and picture holder unit.
in order to reach above-mentioned purpose, the cleaning device of a first aspect of the present invention is characterised in that, this cleaning device comprises: the elasticity cleaning part, its be used for keep image as the Surface Contact of holder and clean this surface, the support component that a plurality of faces of above-mentioned elasticity cleaning part are supported, to the above-mentioned unit of exerting pressure of pressing above-mentioned support component as holder, and holding unit, above-mentioned support component and the above-mentioned unit of exerting pressure are maintained at the inside of above-mentioned holding unit, above-mentioned support component is retained as and can moves along rectilinear direction in the inside of above-mentioned holding unit, above-mentioned elasticity cleaning part has: be positioned at than more leaning on the first surface of the sense of rotation upstream side of above-mentioned picture holder with the opposed edge part of above-mentioned picture holder, be positioned at than with the opposed edge part of above-mentioned picture holder more by second of the sense of rotation downstream of above-mentioned picture holder, with the 3rd in abutting connection with above-mentioned first surface with above-mentioned second opposition side, above-mentioned first surface and above-mentioned the 3rd face are fixed on above-mentioned support component.
In addition, on the basis of the cleaning device of first aspect, the cleaning device of second aspect is characterised in that, above-mentioned elasticity cleaning part is tabular, above-mentioned cleaning device has fixing substrate, this fixing substrate along above-mentioned as holder axially one of above-mentioned elasticity cleaning part distolaterally is fixed support, another of above-mentioned elasticity cleaning part is distolateral to be supported on above-mentioned support component.
In addition, on the basis of the cleaning device of first aspect, the cleaning device of the third aspect is characterised in that, the direction of exerting pressure of the above-mentioned unit of exerting pressure is roughly parallel to above-mentioned central point as holder and above-mentioned elasticity cleaning part and the above-mentioned rectilinear direction that couples together as the contact point of the opposed edge part of holder.
In addition, to the third aspect on the basis of the cleaning device of any one, the cleaning device of fourth aspect is characterised in that first, and above-mentioned elasticity cleaning part is being crimped on the surface of above-mentioned picture holder under the state that is not attended by the flexible deformation.
In addition, in aspect first to fourth on the basis of the cleaning device of any one, the cleaning device of the 5th aspect is characterised in that, the cross section of above-mentioned elasticity cleaning part forms roughly quadrilateral, and above-mentioned cross section have with the above-mentioned first surface opposition side fourth face in abutting connection with above-mentioned second and above-mentioned the 3rd, above-mentioned fourth face also is fixed on above-mentioned support component.
In addition, in aspect first to the 5th on the basis of the cleaning device of any one, the cleaning device of the 6th aspect is characterised in that, to be made as fourth face with the face of above-mentioned rotating shaft direct cross as holder, the length of the part that above-mentioned first surface is exposed and intersects with above-mentioned fourth face from above-mentioned support component is made as β, the length of above-mentioned second part that intersects with above-mentioned fourth face is made as in the situation of α, satisfies α 〉=β.
In addition, on the basis of the cleaning device aspect the 6th, the cleaning device of the 7th aspect is characterised in that, the cross section of above-mentioned elasticity cleaning part forms roughly square.
In addition, the imaging device of a eighth aspect of the present invention is characterised in that, this imaging device comprises: as holder; Make the charging device of the surface charging of above-mentioned picture holder; Exposure device, it makes the face exposure of the above-mentioned picture holder of charging by above-mentioned charging device, and forms electrostatic latent image on this surface; Display, the electrostatic latent image video picture that it utilizes developer to make to form by above-mentioned exposure device; Middle transfer body, it is to video picture and the image that keeps on above-mentioned surface as holder carry out transfer printing by above-mentioned display; And first to the 7th described cleaning device of any one in the aspect, it is removed not by above-mentioned middle transfer body transfer printing and remaining in the lip-deep developer of above-mentioned picture holder.
In addition, the imaging device of a ninth aspect of the present invention is characterised in that, this imaging device comprises: as holder; Make the charging device of the surface charging of above-mentioned picture holder; Exposure device, it makes the face exposure of the above-mentioned picture holder of charging by above-mentioned charging device, and forms electrostatic latent image on this surface; Display, the electrostatic latent image video picture that it utilizes developer to make to form by above-mentioned exposure device; Middle transfer body, it is to video picture and the image that keeps on above-mentioned surface as holder carry out transfer printing by above-mentioned display; And first to the 7th described cleaning device of any one in the aspect, it is removed not from above-mentioned middle transfer body and is transferred on recording medium and remaining in the lip-deep developer of this middle transfer body.
In addition, being characterised in that as holding unit of a tenth aspect of the present invention, this comprises as the holder unit: as holder; With with above-mentioned picture holder integrated the first to the 7th aspect in the described cleaning device of any one, above-mentioned as installing and removing with respect to imaging device the holder unit.
According to the invention of first aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress to produce turnup.Compare with the situation that does not have the unit of exerting pressure, except the effect with first aspect, can also suppress to produce damaged.
According to the invention of second aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, except the effect with first aspect, can also suppress passivation (aging).
According to the invention of the third aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, except the effect with first aspect, can also suppress passivation (aging).
According to the invention of fourth aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, except the effect with first aspect, can also suppress passivation (aging).
According to the invention of the 5th aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress reliably the generation of turnup, damaged, passivation, extraordinary noise.
According to the invention of the 6th aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress reliably the generation of turnup, damaged, passivation, extraordinary noise.
According to the invention of the 7th aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress reliably the generation of turnup, damaged, passivation, extraordinary noise.
According to the invention of eight aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress the generation of turnup, damaged, passivation, extraordinary noise.Therefore can extend the life-span of imaging device and improve its reliability.
According to the invention of the 9th aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress the generation of turnup, damaged, passivation, extraordinary noise.Therefore can extend the life-span of imaging device and improve its reliability.
According to the invention of the tenth aspect, the elasticity cleaning part of cleaning device is compared with the situation that does not have this structure, can suppress the generation of turnup, damaged, passivation, extraordinary noise.Therefore can extend life-span and its reliability of raising as the holder unit.
Description of drawings
Fig. 1 means the Sketch figure of the imaging device that present embodiment relates to.
Fig. 2 is the summary side view that schematically represents the structure of cleaning device.
Fig. 3 amplifies the summary side view that the elasticity cleaning part periphery in the first embodiment of cleaning device represents.
Fig. 4 amplifies the summary side view that the elasticity cleaning part periphery in the second embodiment of cleaning device represents.
Fig. 5 means elasticity cleaning part in the second embodiment of cleaning device and the summary stereographic map of support component.
Fig. 6 amplifies the summary side view that the elasticity cleaning part periphery in the 3rd embodiment of cleaning device represents.
Fig. 7 amplifies the summary side view that the elasticity cleaning part in the 3rd embodiment of cleaning device represents.
Fig. 8 A means that elasticity cleaning part in the second embodiment and the 3rd embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Fig. 8 B means that elasticity cleaning part in the second embodiment and the 3rd embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Fig. 9 amplifies the summary side view that the elasticity cleaning part periphery in the 4th embodiment of cleaning device represents.
Figure 10 means the summary sectional side view of the condition the when cleaning device with the 4th embodiment is arranged on imaging device.
Figure 11 means elasticity cleaning part in the 4th embodiment of cleaning device and the summary front view of support component.
Figure 12 A means that elasticity cleaning part in the first embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Figure 12 B means that elasticity cleaning part in the first embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Figure 13 A means that elasticity cleaning part in the 4th embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Figure 13 B means that elasticity cleaning part in the 4th embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Figure 14 means the summary side view of the elasticity cleaning part periphery in the 5th embodiment of cleaning device.
Figure 15 means elasticity cleaning part in the 5th embodiment of cleaning device and the summary front view of support component.
Figure 16 means the summary side view of the elasticity cleaning part periphery in the 6th embodiment of cleaning device.
Figure 17 amplifies the summary side view that the elasticity cleaning part in the 6th embodiment of cleaning device represents.
Figure 18 means that elasticity cleaning part in the 6th embodiment is with respect to the key diagram of the contact condition of photosensitive drums.
Figure 19 means that elasticity cleaning part in comparative example is with respect to the key diagram of the contact condition of photosensitive drums.
Embodiment
Below, based on embodiment shown in the drawings, illustrate preferred forms of the present invention.Fig. 1 means the Sketch figure of the imaging device 10 that present embodiment relates to, and Fig. 2 is the summary side view that schematically represents the structure of cleaning device 28.And Fig. 3 amplifies the summary side view that elasticity cleaning part 60 peripheries in the first embodiment of cleaning device 28 represent.In addition, in each figure, arrow UP represent the top, arrow IN represents the inboard, as benchmark represent the up and down, inside and outside.
At first, the simple declaration present embodiment relate to the structure of imaging device 10, the versicolor English alphabet of expression is not added in the label back in the position that shares for every kind of color.As shown in Figure 1, this imaging device 10 has the imaging section 12 of four look straight column modes, and this imaging section 12 will be transferred on ring-band shape intermediate transfer belt 24 described later based on the toner image of each color of the view data of inputting, thereby forms full-color image.
Imaging section 12 has electro photography image-generating unit 14Y, 14M, 14C, 14K successively from the direction of transfer upstream side as the paper used for recording P of an example of recording medium, above-mentioned image-generating unit 14Y, 14M, 14C, 14K export respectively yellow (Y), magenta (M), blue-green (C), the versicolor image of black (K), and each image-generating unit 14Y～14K is along preset distance ground, moving direction (shown in arrow B) the space configuration side by side of intermediate transfer belt 24.
Each image-generating unit 14Y～14K has as the photosensitive drums 16Y of holder～16K, above-mentioned photosensitive drums 16Y～16K is the stacked photographic layer that is made of organic light-guide electricity body etc. and consisting of on the metal-made cylinder of its electric conductivity surface (side face), and is rotated driving with predetermined processing speed to illustrated arrow A direction (clockwise direction).
In addition, this photographic layer is the function divergence type photographic layer that stacks gradually charge generation layer and electric charge transport layer, is generally high resistance, but has the character that the ratio resistance of the part that laser beam is shone when by laser light irradiation changes.In addition, the diameter of each photosensitive drums 16Y～16K is preferably in the scope of 20mm～100mm.
Around each photosensitive drums 16Y～16K, dispose successively as lower component from its sense of rotation upstream side: as the charger 18Y～18K of charging device, these chargers 18Y～18K makes photosensitive drums 16 surfaces (side face) in predetermined electric potential uniform charging; Exposure device 20Y～20K, these exposure devices 20Y～20K be to surface (side face) irradiation of the photosensitive drums 16Y of the uniform charging～16K laser beam (as light) based on the view data (picture signal) of color separation, thereby form electrostatic latent image by exposure; Display 22Y～22K, the toner (developer) that these displaies 22Y～22K will charge transfer to and (carry out video picture) on electrostatic latent image and form toner image; The intermediate transfer belt 24 of ring-band shape, but this intermediate transfer belt 24 pitch of the laps ground tensioning frames are located on the path that contacts with photosensitive drums 16Y～16K; Primary transfer roller 26Y～26K, the toner image that these primary transfer rollers 26Y～26K is used for forming on photosensitive drums 16Y～16K is transferred to intermediate transfer belt 24; And cleaning device 28Y～28K, these cleaning devices 28Y～28K removes the transfer printing residual toner Nt(that remains in after primary transfer on photosensitive drums 16Y～16K surface (side face) with reference to Fig. 2).
Be provided with elasticity cleaning part 60Y～60K on each cleaning device 28Y～28K, these elasticity cleaning parts 60Y～60K is crimped on photosensitive drums 16Y～16K surface (side face), from photosensitive drums 16Y～16K, transfer printing residual toner Nt is wiped (scraping).In addition, illustrate in the back this cleaning device 28(elasticity cleaning part 60).
In addition, each primary transfer roller 26Y～26K is configured in intermediate transfer belt 24 inboards, and is arranged on each photosensitive drums 16Y～16K respectively on opposed position.And the contact site that primary transfer roller 26Y～26K makes photosensitive drums 16Y～16K contact with intermediate transfer belt 24 becomes the T1 of primary transfer section (primary transfer position).
In addition, be connected with respectively on each primary transfer roller 26Y～26K be used to the grid bias power supply that applies the primary transfer bias voltage (diagram is omitted).Have, each grid bias power supply is used as the control part (diagram is omitted) of control module and controls, thereby can change the primary transfer bias voltage that each primary transfer roller 26Y～26K is applied again.In addition, the contact charging device that illustrated charger 18Y～18K is roll profile, however also can use the non-contact chargers such as Gate lattice corona tube or solid discharge device.
On the other hand, as the intermediate transfer belt 24 of middle transfer body on hanging over lower component: primary transfer roller 26Y～26K; Be rotated the driven roller 32 of driving by not shown drive source; Driven voller 33; And the backing roll 34 that is configured in the T2 of secondary transfer printing section described later (secondary transfer printing position), thereby make intermediate transfer belt 24 move (slip) in the mode with photosensitive drums 16 synchronous rotaries along the arrow B direction rotation.
In addition, this intermediate transfer belt 24 is to form like this: for example, give with graphite or ionic conduction material etc. the material that electric conductivity uses and be dispersed in the resin materials such as polyimide, polyamide-imide, polycarbonate, fluororesin, and surface resistivity is adjusted to 10 10Ω/～10 12(mensuration voltage: 100V) about Ω/.
In addition, across intermediate transfer belt 24 and with backing roll 34 opposed position on be provided with secondary transfer roller 36 as transfer section, this secondary transfer roller 36 is used for the toner image on intermediate transfer belt 24 is transferred to the paper used for recording P that transmits as the connecting gear 42 of conveyer by described later.The contact site that this secondary transfer roller 36 is contacted with intermediate transfer belt 24 is as the T2 of secondary transfer printing section (secondary transfer printing position).
In addition, this imaging device 10 has: toner is removed device (cleaning device) 38, this toner is removed device 38 and is used for after by secondary transfer roller 36, toner image being transferred on paper used for recording P, the transfer printing residual toner that remains on intermediate transfer belt 24 being removed; With the fixing device 40 as photographic fixing section, this fixing device 40 is used for the toner image that is transferred on paper used for recording P by secondary transfer roller 36 is carried out photographic fixing.
Connecting gear 42 is by consisting of with lower component: the pick-up roller 46 that transmits one by one the paper used for recording P that is incorporated in sheet feed section 44; Be arranged on guiding parts 50 and a pair of transfer roller 48 on the transfer path of paper used for recording P; Travelling belt 56, this travelling belt 56 be configured in than secondary transfer roller 36 more by the downstream of the transfer path of paper used for recording P and than fixing device 40 more by the upstream side of the transfer path of paper used for recording P, and around hanging on guide roller 52,54; Be arranged on a pair of exit roller 58 in the downstream of fixing device 40; And ADF section (diagram is omitted) etc.
Thereby constitute following structure: utilize this connecting gear 42, the paper used for recording P of sheet feed section 44 will be accommodated in, be sent to secondary transfer roller 36 and backing roll 34 across intermediate transfer belt 24 and the T2 of opposed secondary transfer printing section (secondary transfer printing position), and be sent to fixing device 40 from the T2 of secondary transfer printing section (secondary transfer printing position), and then be sent to ADF section from fixing device 40.
The imaging device 10 of above this structure forms full-color image by following action.In addition, because versicolor image-generating unit 14Y～14K has roughly the same structure, therefore the action that utilizes image-generating unit 14Y to form the Yellow toner picture only is described here.
At first, utilize charger 18Y make photosensitive drums 16Y surface-600V～-current potential of 800V left and right under uniform charging.According to the yellow view data of sending here from control part, utilize exposure device 20Y to the surface irradiation laser beam of the photosensitive drums 16Y of uniform charging.That is, formed the electrostatic latent image of yellow lettering pattern on the photographic layer of photosensitive drums 16Y.
In addition, so-called electrostatic latent image, it is the picture that forms on photosensitive drums 16Y surface (photographic layer) by charging, at photographic layer, the ratio resistance of the part that laser light irradiation arrives descends, the flow of charge that photosensitive drums 16Y charges on the surface, and laser light irradiation less than the electric charge of part left behind and form so-called " negative sub-image ".
Like this, the electrostatic latent image that forms on photosensitive drums 16Y, the rotation by photosensitive drums 16Y is sent to predetermined video picture position.And on this video picture position, the electrostatic latent image on photosensitive drums 16Y becomes visible image (toner image) by display 22Y.In display 22Y, take in the Yellow toner of volume averaging particle diameter in 3 μ m～6 μ m scopes that for example comprises at least yellow colorants and adhering resin.
Yellow toner is by being stirred and triboelectric charging in display 22Y inside, and this Yellow toner has the electric charge with the charging charge identical polar (-) on photosensitive drums 16Y surface.Therefore, make photosensitive drums 16Y surface by display 22Y, thus make a Yellow toner electrostatic adhesion photosensitive drums 16Y surface by the sub-image section except electricity on, thereby sub-image is because of the Yellow toner video picture.After this, photosensitive drums 16Y continues rotation, is sent to the T1 of primary transfer section (primary transfer position) at the toner image of its surperficial video picture.
When the Yellow toner on photosensitive drums 16Y surface looks like to be sent to the T1 of primary transfer section (primary transfer position), primary transfer roller 26Y is applied in predetermined primary transfer bias voltage, from photosensitive drums 16Y towards the electrostatic forcing of primary transfer roller 26Y on toner image, thereby the toner image on photosensitive drums 16Y surface is transferred on intermediate transfer belt 24 surfaces.This moment, the primary transfer bias voltage that applies was in the polarity (+) opposite with the polarity (-) of toner, and for example image-generating unit 14Y is controlled at by the control part constant current+20 μ A～+ 30 μ A left and right.
Utilize cleaning device 28Y that the transfer printing residual toner Nt on photosensitive drums 16Y surface is cleaned.In addition, similarly the primary transfer bias voltage of primary transfer roller 26M～26K of imposing on image-generating unit 14M～14K is controlled with above-mentioned.Like this, the intermediate transfer belt 24 that is transferred the Yellow toner picture by image-generating unit 14Y is sequentially transferred to the image-generating unit 14M～14K of other colors, thereby carries out transfer printing (multiple transfer printing) in the equitant mode of versicolor toner image.
By each image-generating unit 14Y～14K and multiple transfer printing the intermediate transfer belt 24 of all colours toner image, along the transmission of being slided of illustrated arrow B direction, and arrive the T2 of secondary transfer printing section (secondary transfer printing position) that the backing roll 34 that is joined by the inside surface (back side) with intermediate transfer belt 24 and the secondary transfer roller 36 as maintenance face side that is configured in intermediate transfer belt 24 consist of.
On the other hand, regularly paper used for recording P is supplied between secondary transfer roller 36 and intermediate transfer belt 24 predetermined by connecting gear 42, predetermined secondary transfer printing bias voltage is applied to secondary transfer roller 36.The secondary transfer printing bias voltage that apply this moment is in the polarity (+) opposite with the polarity (-) of toner, from middle transfer belt 24 towards the electrostatic forcing of paper used for recording P on toner image, thereby the toner image on intermediate transfer belt 24 surfaces is transferred on the surface of paper used for recording P.
And the secondary transfer printing bias voltage of this moment is according to the resistance that utilizes resistance detection section (diagram is omitted) to detect and definite and be controlled under constant voltage, and this resistance detection section is for detection of the resistance of the T2 of secondary transfer printing section (secondary transfer printing position).After this, paper used for recording P is sent into fixing device 40, to toner image heating, pressurization, make the toner image melting of colour superimposition (multiple transfer printing), and forever be fixed on the surface of paper used for recording P.Then, the paper used for recording P that the photographic fixing of full-color image is through with is transmitted to ADF section, and a series of like this full color imagings actions have just been completed.
Next illustrate the cleaning device 28 in above-mentioned this imaging device 10.At first, the first embodiment is described.As shown in Figure 2 and Figure 3, cleaning device 28 closely configure with photosensitive drums 16 surfaces (side face), and this cleaning device 28 have towards with the clearer shell 30 of photosensitive drums 16 surperficial opposed side openings.
In addition, this cleaning device 28 constitutes and the integrated photo-conductor unit of photosensitive drums 16 (as the holder unit) 27 at least, and this cleaning device 28 can be installed and removed with respect to imaging device 10 under the state of this photo-conductor unit 27.Cleaning device 28 can constitute with monomer and also can be installed and removed with respect to imaging device 10 by blocking in addition, and then also can constitute: cleaning device 28 is mounted to and can not installs and removes with respect to imaging device 10, and photosensitive drums 16 can be installed and removed with respect to imaging device 10.
The inside surface of the open end 30B of the lower side of clearer shell 30 is equipped with seal member 72, and sealing parts 72 are used for preventing from being accommodated in the used toner in cleaning device 28 etc. and leak to the outside.That is, sealing parts 72 constitute: in the mode that the gap between photosensitive drums 16 and cleaning shell 30 is stopped up substantially, extend to photosensitive drums 16, and do not contact with this photosensitive drums 16.In addition, seal member 72 for example uses that thickness is the thermoplastic polyurethane thin slice of 0.2mm.
In addition, the downside in clearer shell 30 is equipped with the auger 74 as conveyer, and this auger 74 is used for the used toner that will be recovered to etc. and is sent to the used toner discharge portion (diagram is omitted) that is arranged at clearer shell 30 outsides.And, more be equipped with elasticity cleaning part 60 by the downstream of the sense of rotation (arrow A direction) of photosensitive drums 16 at the ratio seal member 72 of clearer shell 30.
Namely, on the lower external face as the sheet metal 76 of fixing substrate that along the axial setting of photosensitive drums 16 and cross section view is " L " font, the base portion (end) 62 of elasticity cleaning part 60 by the mode fixed support such as bonding, this sheet metal 76 is fixed on the outer surface of upper of clearer shell 30 by stop screw 78.
In addition, this elasticity cleaning part 60 is formed tabular (the scraping tabular) of predetermined thickness by resilient material, for example forming its thickness is 2.0mm, and drift (not being fixed on the width (length of above-below direction) on sheet metal 76) is 10.0mm, is 330mm along the axial length of photosensitive drums 16.
In addition, as this resilient material, the engineering properties such as its abrasion performance, anti-damaged property, creep resistant are superior, for example can use the heat curing-type urethane rubber.In addition, as the resilient material of elasticity cleaning part 60, for example, also can use the functional rubber materials such as silica gel, fluorine glue, EPDR (EPDR) etc.
In addition, elasticity cleaning part 60 has: lower surface (first surface) 64A, this lower surface 64A be positioned at than the leading section (bottom) 64 of this elasticity cleaning part 60 with the opposed edge part 65 of photosensitive drums 16 more by the sense of rotation upstream side of photosensitive drums 16; Lateral surface 64B, this lateral surface 62B be positioned at than the leading section (bottom) 64 of this elasticity cleaning part 60 with the opposed edge part 65 of photosensitive drums 16 more by the sense of rotation downstream of photosensitive drums 16; And medial surface 64C, this medial surface 64C with lateral surface 64B opposition side in abutting connection with lower surface 64A.
And medial surface (another the is distolateral) 64C bonding (fixing) of the part that is arranged in clearer shell 30 sides (another is distolateral) of the lower surface 64A in the leading section 64 of elasticity cleaning part 60 and the leading section 64 of elasticity cleaning part 60 is on support component 70.The cross section view of this support component 70 forms " L " font, be crimped on the surface of photosensitive drums 16 and when producing deflection deformation at elasticity cleaning part 60, this support component 70 and leading section 64 elasticity cleaning part 60 bonding the medial surface 70C butt (contact) of lateral surface opposition side on the outside surface of the open end 30A of clearer shell 30 upper sides.
That is, this elasticity cleaning part 60 constitutes: the open end 30A restriction of the action of its leading section 64 (to the action of the direction of leaving photosensitive drums 16 surfaces) cleaned device shell 30 upper sides via support component 70.In addition, support component 70 also not butt (contact) on the outside surface of the open end 30A of clearer shell 30, and be bonded on the outside surface of this open end 30A.
Consist of in any case, elasticity cleaning part 60 all with simple in structure and cheaply the location mode of moving photosensitive drums 16 is pressurizeed, this plus-pressure can be set as for example 39.2N/m(4gf/mm).In addition, this pressuring method is not limited to the location and moves mode, also can use and have hardly the time dependent constant load mode of plus-pressure.And then this cleaning device 28 also can use conducting fibre system brush or magnetic brush (diagram is all omitted) etc. with elasticity cleaning part 60 in the lump.
Next, the effect of the cleaning device 28 of the first embodiment of this structure described.At first comparative example is described.As shown in Figure 19, in the situation that tabular elasticity cleaning part 160 is scraped in use, usually, as the set angle θ of elasticity cleaning part 160, be that elasticity cleaning part 160 is when becoming large with the formed angle θ of the lip-deep tangent line of photosensitive drums 116, interception power to the transfer printing residual toner that remains in photosensitive drums 116 surfaces increases, and has the tendency of the clean-up performance that improves elasticity cleaning part 160.
But, when the set angle θ because of elasticity cleaning part 160 becomes the friction force on 165 pairs of excessive edge parts that makes elasticity cleaning part 160 photosensitive drums 116 surfaces when excessive, easily produce following situation: cause the leading section 164 of elasticity cleaning part 160 leave photosensitive drums 116 and roll, namely easily occur " turnup ".If the generation turnup, the power of tackling does not act on, and therefore can't bring into play cleaning function.
To this, the elasticity cleaning part 60 of this first embodiment constitutes: by leading section 64(being comprised the lateral surface 64B of edge part 65) be crimped on photosensitive drums 16 surfaces, thereby this leading section 64 produces deflection deformation to the direction of leaving photosensitive drums 16, the open end 30A restriction of this deflection deformation upper side of cleaned device shell 30 via support component 70.
Therefore, as shown in Figure 2, the transfer printing residual toner Nt that remains in photosensitive drums 16 surfaces is comprised the lower surface 64A of edge part 65 like this by the leading section 64(of flexible cleaning parts 60 by the leading section of seal member 72) scrape.Scraped fallen transfer printing residual toner Nt and temporarily be received into clearer shell 30 inside, then transmitted and be discharged to cleaning device 28 outsides (used toner discharge portion) by auger 74.
In addition, elasticity cleaning part 60, due to the action of its leading section 64 (to the action of the direction of leaving from photosensitive drums 16 surfaces) open end 30A restriction of the upper side of cleaned device shell 30 via support component 70, therefore guaranteed the plus-pressure of 60 pairs of photoreceptors 16 of elasticity cleaning part.Thereby, can suppress turnup and the passivation (aging) of elasticity cleaning part 60.That is, elasticity cleaning part 60 that should the first embodiment owing to being difficult for producing the situation that plus-pressure reduces in time, therefore can suppress the clean-up performance reduction.
In addition, thus, can also suppress by elasticity cleaning part 60 extraordinary noise so-called " ring sound " that the microvibration when photoreceptor 16 surface sliding (card, sliding) causes.That is, scraping on tabular elasticity cleaning part 60 of rubber system can produce the different multiple vibration mode of frequency, and multiple vibration mode is especially under high frequency situations, with regard to as feeling harsh noise and perceived.This spirant is by by the structure of elasticity cleaning part 60 with impose a condition, carry out self-sustained oscillation under vibration mode (single or compound) that the various factorss such as the circumferential speed of the friction factor on keeping method, peripheral bracket structure, photosensitive drums 16 and elasticity cleaning part 60 surfaces, photosensitive drums 16, humiture environment determine and produce.
In this first embodiment, utilize flexible cleaning parts 60 to clean under the hot and humid environment that easily produces the ring sound, and then as stress condition in order to increase the friction factor on photosensitive drums 16 surfaces, make the electric current of supplying with charger 18 become the generation that common twice increases discharge product.And then concerning elasticity cleaning part 60, the toner coverage amount that will become on every die of stress condition is carried out lettering with shades of colour 1%, thereby has reduced the amount that arrives elasticity cleaning part 60 as the toner of lubricant.
Consequently, even under above-mentioned this condition, because the leading section 64 of elasticity cleaning part 60 is bonded on the support component 70 that contacts (perhaps bonding) with the open end 30A of clearer shell 30 (because action is limited), so above-mentioned microvibration also can be suppressed, produce thereby suppress vibration mode.That is, so far since original state when stable operation (during photosensitive drums 16 starting and when stopping and etc.), above-mentioned spirant has occured all, the elasticity cleaning part 60 of this first embodiment has suppressed the generation of ring sound.
In addition, medial surface (another the is distolateral) 64C bonding (fixing) of the part in clearer shell 30 sides (another is distolateral) of the lower surface 64A of the leading section 64 by making elasticity cleaning part 60 and the leading section 64 of elasticity cleaning part 60 on support component 70, thereby can obtain above-mentioned effect.If these faces not by bonding (fixing) but only join with support component 70, can produce skew on surface of contact, can't fully obtain above-mentioned effect.
In addition, in this first embodiment, to lower surface (first surface) 64A of elasticity cleaning part 60 and medial surface (the 3rd face) 64C roughly the form of quadrature be illustrated, even and connect with the form of curved surface between the two, also can reach effect same.
Next, the second embodiment is described.Fig. 4 amplifies the summary side view that the periphery of the elasticity cleaning part 66 in the second embodiment of cleaning device 28 represents, Fig. 5 means elasticity cleaning part 66 in the second embodiment of cleaning device 28 and the summary stereographic map of support component 70.In addition, the position that is equal to above-mentioned the first embodiment is marked with same numeral and omits illustrate.
The elasticity cleaning part 66 of this second embodiment is the short billet shape of elasticity cleaning part 60 of above-mentioned first embodiment of Length Ratio of above-below direction.That is, this elasticity cleaning part 66 can be made by the elasticity cleaning part 60 that suitably cuts the elongate in shape shown in above-mentioned the first embodiment (scraper plate shape), and its material is basically the same as those in the first embodiment.In addition, as the size of the elasticity cleaning part 66 of rectangular shaped (billet shape), for example can used thickness be that 2.0mm(is identical with the first embodiment), width (length of above-below direction) is the elasticity cleaning part 66 of the rectangle section of 4.0mm.
In addition, the elasticity cleaning part 66 of this second embodiment has: be positioned at than more depending on lower surface (first surface) 66A of the sense of rotation upstream side of photosensitive drums 16 with the opposed edge part 67 of photosensitive drums 16; Be positioned at than with the opposed edge part 67 of photosensitive drums 16 more by lateral surface (the second face) 66B in the sense of rotation downstream of photosensitive drums 16; And with medial surface (three face) 66C of this lateral surface 66B opposition side in abutting connection with lower surface 66A.And this edge part 67 is cut to 90 °.
It is in order to obtain the edge definition as elasticity cleaning part 66 that edge part 67 is cut to the reason of 90 °.That is, for to effect interception power such as transfer printing residual toner Nt, need processing accurately to be used for being crimped on the edge part 67 on photosensitive drums 16 surfaces (side face), from the processibility viewpoint, cut into 90 ° and the most easily reach edge definition.In addition, need not except edge part 67 must be 90 °.
In addition, the part that is positioned at clearer shell 30 sides of the lower surface 66A of this elasticity cleaning part 66 and medial surface 66C bonding (fixing) are on the lateral surface of support component 70, and the medial surface 70C of this support component 70 bonding (fixing) is on the outside surface of the open end 30A of clearer shell 30 upper sides.That is, flexible cleaning parts 66 are maintained on clearer shell 30 by support component 70.
In addition, as shown in Figure 5, in this second embodiment, use the elasticity cleaning part 66 identical with the first embodiment as 330mm(along the axial length L of photosensitive drums 16), support component 70 is along the parts of the axial length J of photosensitive drums 16 as 334mm.In addition, the length J of support component 70 also can be identical with the length of elasticity cleaning part 66, but from the easy fixedly aspect of elasticity cleaning part 66, the length J of preferred support component 70 is than elasticity cleaning part 66 long number mm left and right (being 4mm in this situation).
Therefore in addition, this elasticity cleaning part 66 is billet shapes as described above, as the edge part 67 of the boundary member between lower surface 66A and outside surface 66B, is assembled into and is being crimped under the state that is not attended by deflection deformation on photosensitive drums 16 surfaces.Namely, this elasticity cleaning part 66 forms: in order to ensure its desired plus-pressure to photosensitive drums 16 surfaces, making edge part 67 along radially the nipping of photosensitive drums 16, by making not deflection deformation of edge part 67() elastic deformation (compression deformation) obtains required plus-pressure.
Next, the effect of cleaning device 28 of the second embodiment of this structure is described.In addition, omit illustrating the effect that is equal to above-mentioned the first embodiment.As mentioned above, the elasticity cleaning part 66 of this second embodiment is bonding and be supported on lateral surface with the bonding support component 70 of the outside surface of clearer shell 30, thereby makes this edge part 67 nip surface (with reference to Fig. 8 A) of photosensitive drums 16.
Therefore, this elasticity cleaning part 66 produces elastic deformation by means of the rotary actuation of photosensitive drums 16 as shown in Fig. 8 B, thereby the transfer printing residual toner Nt that remains in photosensitive drums 16 surfaces is scraped.At this, because this elasticity cleaning part 66 is billet shape as described above, the turnup and the passivation that cause when therefore being difficult for being created in elongate in shape (scraper plate shape).In addition, owing to being difficult for producing deflection deformation, so be difficult for producing the vibration mode that becomes the factor that produces the ring sound.
In fact, in order to confirm to suppress the effect of this ring sound, implement cleaning under the appreciation condition identical with above-mentioned the first embodiment, yet in the situation that use has the cleaning device 28 of the elasticity cleaning part 66 of the second embodiment, almost do not produce the ring sound.In addition, in order to confirm basic clean-up performance, continuous supplying is given the A3 paper using of three solid coatings (image that the image density with 100% forms) on whole of image-region, and the wiping whether evaluation produces toner falls, yet toner is not wiped, and initial clean-up performance is no problem.
Next, the 3rd embodiment is described.Fig. 6 amplifies the summary side view that the periphery of the elasticity cleaning part 68 in the 3rd embodiment of cleaning device 28 represents.In addition, the position that is equal to above-mentioned the first embodiment is marked with same numeral and omits it illustrate.Same with the elasticity cleaning part 66 of above-mentioned the second embodiment, the elasticity cleaning part 68 of the 3rd embodiment also is the billet shape, and its cross sectional shape is roughly equilateral quadrilateral (roughly square).
By making cross sectional shape be roughly equilateral quadrilateral (roughly square), compare thereby formed with there is the situation as a side of growing the limit as the elasticity cleaning part 66 as shown in the second embodiment, can suppress the structure of this long side deflection deformation.In addition, from preventing the purpose of deflection deformation, elasticity cleaning part 68 is preferably its cross sectional shape and forms roughly equilateral quadrilateral (roughly square), if but do not produce deflection deformation, need not necessarily equilateral.In addition, under elasticity cleaning part 68 formed roughly foursquare situation, from preventing the viewpoint of deflection deformation, preferably each limit was than for about for example 1:1～1:1.2.
In addition, this elasticity cleaning part 68 constitutes: its edge part 69 that contacts with photosensitive drums 16 is cut to 90 ° at least.It is in order to obtain the edge definition as elasticity cleaning part 68 that edge part 69 is cut to the reason of 90 °.That is, for to effect interception power such as transfer printing residual toner Nt, need processing accurately to be used for being crimped on the edge part 69 on photosensitive drums 16 surfaces (side face), from the processibility viewpoint, cut into 90 ° and the most easily reach edge definition.In addition, need not except edge part 69 must be 90 °.
The elasticity cleaning part 68 of the 3rd embodiment has: be positioned at than more depending on lower surface (first surface) 68A of the sense of rotation upstream side of photosensitive drums 16 with the opposed edge part 69 of photosensitive drums 16; Be positioned at than with the opposed edge part 69 of photosensitive drums 16 more by lateral surface (the second face) 68B in the sense of rotation downstream of photosensitive drums 16; At medial surface (three face) 68C of this lateral surface 68B opposition side in abutting connection with lower surface 68A; And with upper surface (fourth face) 68D of lower surface 68A opposition side in abutting connection with lateral surface 68B and medial surface 68C.
And the support component 80 in this situation forms the bearing shape of joining with elasticity cleaning part 68 3 faces.That is, the part that is positioned at clearer shell 30 sides of the part that is positioned at clearer shell 30 sides of the lower surface 68A of elasticity cleaning part 68, upper surface 68D and medial surface 68C bonding (fixing) are on the lateral surface that is spill of support component 80.And the medial surface 80C of this support component 80 bonding (fixing) is on the outside surface of the open end 30A of clearer shell 30 side's sides, thereby elasticity cleaning part 68 is maintained on clearer shell 30 via support component 80.
Therefore in addition, because this elasticity cleaning part 68 is billet shape as described above, as the edge part 69 of the boundary member between lower surface 68A and outside surface 68B, is assembled into and is being crimped under the state that is not attended by deflection deformation on photosensitive drums 16 surfaces.Namely, same with above-mentioned the second embodiment, this elasticity cleaning part 68 forms: in order to ensure its desired plus-pressure to photosensitive drums 16 surfaces, making edge part 69 along radially the nipping of photosensitive drums 16, by making not deflection deformation of edge part 69() elastic deformation (compression deformation) obtains required plus-pressure.
Next, the effect of cleaning device 28 of the 3rd embodiment of this structure is described.In addition, omit illustrating the effect that is equal to above-mentioned the first embodiment.As mentioned above, the elasticity cleaning part 68 of the 3rd embodiment is bonding and be supported on the lateral surface that is spill with the bonding support component 80 of the outside surface of clearer shell 30, thereby makes this edge part 69 bite into the surface (with reference to Fig. 8 A) of photosensitive drums 16.
Therefore, elastic deformation occurs by means of the rotary actuation of photosensitive drums 16 in this elasticity cleaning part 68 as shown in Fig. 8 B, thereby the transfer printing residual toner Nt that remains in photosensitive drums 16 surfaces is scraped.At this, because this elasticity cleaning part 68 is billet shape as described above, the turnup and the passivation that cause when therefore being difficult for being created in elongate in shape (scraper plate shape).
Particularly, this elasticity cleaning part 68 constitutes: lower surface 68A, medial surface 68C, these three faces of upper surface 68D are maintained on support component 80, so its action is further limited than the action that two faces are maintained at the elasticity cleaning part 66 of the elasticity cleaning part 60 of the first embodiment on support component 70 and the second embodiment.Thereby, compare with the elasticity cleaning part 60 of the first embodiment and the elasticity cleaning part 66 of the second embodiment, can further suppress this elasticity cleaning part 68 turnups and passivation.
In addition, same with above-mentioned the second embodiment, this elasticity cleaning part 68 is difficult for producing deflection deformation, so also be difficult for producing the vibration mode of the factor that becomes the ring sound.Particularly, this elasticity cleaning part 68 constitutes its lower surface 68A, medial surface 68C, three faces of upper surface 68D are maintained on support component 80, thereby its action is further limited, and the sound that therefore rings is also further suppressed.
In fact, in order to confirm the inhibition of this ring sound, implement cleaning under the appreciation condition identical with above-mentioned the first embodiment, yet in the situation that use has the cleaning device 28 of the elasticity cleaning part 68 of the 3rd embodiment, almost do not produce the ring sound.In addition, in order to confirm basic clean-up performance, same with the evaluation method of above-mentioned the second embodiment, continuous supplying is given the A3 paper using of three solid coatings (image that the image density with 100% forms) on whole of image-region, and estimate the wiping whether produce toner and fall, yet toner is not wiped, and initial clean-up performance is no problem.
And then, for the permanance of the elasticity cleaning part 68 of estimating the 3rd embodiment, implement the running test.Be photosensitive drums 16 operation circle (turn) number of cleaning before bad occuring opinion scale, with its with existing cleaning device, for example as shown in figure 19 have scrape tabular elasticity cleaning part 160 cleaning device relatively and utilize running test and try to achieve.In addition, in order to get rid of elasticity cleaning part 68,160 factor in addition, suitably change elasticity cleaning part 68,160 consumables in addition in this running test.
Consequently, for having the existing cleaning device of scraping tabular elasticity cleaning part 160, at 355k circle (355,000 turns) lower can clean bad, and for the cleaning device 28 of the elasticity cleaning part 68 with the 3rd embodiment, can clean bad under 1120k circle (1120,000 turn).That is, can confirm, the permanance of cleaning device 28 with elasticity cleaning part 68 of the 3rd embodiment is brought up to about three times.
In addition, after completing the running test, elasticity cleaning part 68 is taken out from photo-conductor unit 27, the factor of the bad generation of investigation cleaning, can judge: scrape tabular elasticity cleaning part 160 and cause plus-pressure to descend because of passivation (aging) and wearing and tearing, and the elasticity cleaning part 68 of the 3rd embodiment is caused by the wearing and tearing of edge part 69.Thus, can reaffirm, the permanance that is not attended by the elasticity cleaning part 68 of deflection deformation improves.
In addition, the significant dimensions in the elasticity cleaning part 68 of the 3rd embodiment is the height α shown in Fig. 7 and overhang β.The concrete Deformation analyses of implementing edge part 69, consequently can judge: the zone relevant with distortion is that the front end from edge part 69 plays the zone that lower surface 68A side and lateral surface 68B side are all 500 μ m left and right at least.Thereby, in order to act on the required plus-pressure of cleaning, preferred heights α more than 500 μ m, overhang β is also more than 500 μ m.
In addition, from preventing the viewpoint of deflection deformation, be preferably overhang β≤height α.If this is because height α is less than overhang β, can become the such structure of semi-girder, becoming easily produces deflection deformation (turnup).Aspect cleaning function, the upper limit of height α and overhang β without particular limitation of, but from the space of configuration elasticity cleaning part 68 and the viewpoint of cost degradation, be preferably below the 20mm left and right.
In addition, in the second embodiment and the such mode of the 3rd embodiment, from the viewpoint of clean-up performance, the state of each edge part 67,69 when cleaning particularly importantly.Fig. 8 A represents each edge part 67 in the elasticity cleaning part 68 of the elasticity cleaning part 66 of the second embodiment and the 3rd embodiment, 69 static state, each edge part 67 when Fig. 8 B represents that photosensitive drums 16 moves along the arrow A direction in each elasticity cleaning part 66,68,69 dynamic deformation state.
As shown in Fig. 8 B, each elasticity cleaning part 66, each edge part 67 of 68,69 larger in the regional internal strain of tens of microns (μ m) from front end by this distortion, can obtain required plus-pressure.Each elasticity cleaning part 66,68 as long as the desired distortion of generation in the zone of tens of microns from its front end can obtain required plus-pressure, is brought into play good cleaning function conversely speaking.As mentioned above, in order to apply this plus-pressure, need to radially press the surface of photosensitive drums 16, make each edge part 67,69 nip and produce elastic deformation (compression deformation).
In addition, elasticity cleaning part 60 deflection deformations that make tabular (scraping tabular) of this elastic deformation (compression deformation) state and the first embodiment and the front end deformation state of the edge part 65 that obtains is basic identical.Yet the turnup phenomenon can not occur in elasticity cleaning part 66,68 rectangular shapeds due to this second embodiment and the 3rd embodiment, even therefore can use under the larger condition of set angle θ (with reference to Figure 19), can further improve clean-up performance yet.
But, pressuring method to above-mentioned the first embodiment～ elasticity cleaning part 60,66 that the 3rd embodiment relates to, 68 photosensitive drums 16 is: make support component 70,80 the back side ( medial surface 70C, 80C) side become stiff end, only make edge part 65,67,69 produce elastic deformation, therefore have following shortcoming: at the larger foreign matter G(that is attached to photosensitive drums 16 surfaces (side face) with reference to Figure 12 A and Figure 12 B) when entering into elasticity cleaning part 60,66,68 with contact site that photosensitive drums 16 contacts, this edge part 65,67,69 is difficult to evade this foreign matter G.
Namely, elasticity cleaning part 60,66,68 results that can't evade foreign matter G are that this elasticity cleaning part 60,66,68 is easily damaged, when generation is damaged, can be bad with strip or banded generation cleaning, produce sometimes the bad situations of picture quality such as colo(u)r streak/colour band (black line/black-tape).Therefore, in ensuing the 4th embodiment～the 6th embodiment, the structure of the cleaning device 28 that also can suppress these edge parts 65,67,69 " damaged " is described.
At first, the 4th embodiment is described.Fig. 9 amplifies the summary side view that the periphery of the elasticity cleaning part 84 in the 4th embodiment of cleaning device 28 represents, Figure 10 means the summary sectional side view of the condition when being arranged on cleaning device 28 on imaging device 10, and Figure 11 means elasticity cleaning part 84 in the 4th embodiment of cleaning device 28 and the summary front view of support component 70.In addition, the position that is equal to above-mentioned the first embodiment is marked with same numeral and omits illustrate.
The elasticity cleaning part 84 of the 4th embodiment is the billet shape same with the elasticity cleaning part 66 of above-mentioned the second embodiment, be for example that 2.0mm(is identical with the first embodiment for thickness), width (length along the vertical direction) is the rectangle cross sectional shape of 4.0mm.And the elasticity cleaning part 84 of the 4th embodiment is made of the resilient material identical with the elasticity cleaning part 66 of above-mentioned the second embodiment.
In addition, this elasticity cleaning part 84 has: be positioned at than more depending on lower surface (first surface) 84A of the sense of rotation upstream side of photosensitive drums 16 with the opposed edge part 85 of photosensitive drums 16; Be positioned at than with the opposed edge part 85 of photosensitive drums 16 more by lateral surface (the second face) 84B in the sense of rotation downstream of photosensitive drums 16; And with medial surface (three face) 84C of this lateral surface 84B opposition side in abutting connection with lower surface 84A.And this edge part 85 is cut to 90 °.
It is in order to obtain the edge definition as elasticity cleaning part 84 that edge part 85 is cut to the reason of 90 °.That is, for to effect interception power such as transfer printing residual toner Nt, need processing accurately to be used for being crimped on the edge part 85 on photosensitive drums 16 surfaces (side face), from the processibility viewpoint, cut into 90 ° and the most easily reach edge definition.In addition, need not except edge part 85 must be 90 °.
In addition, the part that is positioned at clearer shell 30 sides of the lower surface 84A of this elasticity cleaning part 84 and medial surface 84C bonding (fixing) on the lateral surface of support component 70, the medial surface 70C(back side of this support component 70) end of volute spring 90 as the unit of exerting pressure is installed.For example as shown in figure 11, this volute spring 90 is at the medial surface 70C(back side of support component 70), separate predetermined space and be arranged on many places (being two places in diagram), pressure can be applied on the turning axle direction of photosensitive drums 16 equably thereby be adjusted to.
In addition, like this, when the medial surface 70C(back side at support component 70) when the unit of exerting pressure (volute spring 90) is installed, for example making axle (diagram omit) is that the longitudinally both ends of support component 70 are outstanding from the sense of rotation of photosensitive drums 16, this compares with the structure that the unit of exerting pressure is set on this axle, need not additional space near the longitudinally both ends of support component 70.That is, when constituting the structure shown in Figure 11, can realize the miniaturization of imaging device 10.
In addition, by the volute spring 90(unit of exerting pressure) institute's applied pressure is by under various conditions spatter property and decisions such as discharge product removability and maintenance thereof, the plus-pressure of the 84 pairs of photosensitive drums 16 of elasticity cleaning part in the 4th embodiment is set as for example 19.6N/m(2gf/mm).This plus-pressure can suppress be in the first embodiment 60 pairs of photosensitive drums 16 of elasticity cleaning part stressed 1/2.
At this, the plus-pressure of this elasticity cleaning part 84 can the reasons are as follows than plus-pressure little (can be for example 1/2) of the elasticity cleaning part 60 of the first embodiment: due to the passivation that does not have the elasticity cleaning part 84 that is caused by deflection deformation, do not improve in advance initial value so do not need to estimate passivation as the elasticity cleaning part 60 of the first embodiment; Even 84 wearing and tearing of elasticity cleaning part, volute spring 90 also applies constant load (pressure) all the time.
On the other hand, the other end of volute spring 90 is arranged on the inner bottom surface 82C of holding member 82, this holding member 82 is taken in slidably support component 70 and is the elongated rectangular case shape that a face opens wide, and support component 70 is retained as under the state that is loaded to photosensitive drums 16 sides by this volute spring 90 can be in holding member 82 slides within.And the outer bottom 82D of this holding member 82 installs (bonding) on the outside surface of the open end 30A of the upper side of clearer shell 30.
At this, the compression aspect on the surface (side face) of the 84 pairs of photosensitive drums 16 of elasticity cleaning part in the 4th embodiment is set like this by following.Namely, as shown in figure 10, compression aspect is set as: the bearing of trend that is roughly parallel to the virtual line L1 that edge part 85 with the rotary middle point Q1 of photosensitive drums 16 and elasticity cleaning part 84 contacts (opposed) with photosensitive drums 16 surfaces (side face) contact point Q2 couples together.
This be because: the scraping property when mainly useful for utilizes elasticity cleaning part 84 to clean and maintenance be, towards the stress (pressure) of the rotary middle point Q1 of photosensitive drums 16 direction, the direction of giving efficiently this stress (pressure) is above-mentioned compression aspect.In addition, as shown in figure 10, the imaginary center line L2 of the horizontal direction of photosensitive drums 16 and virtual line L1 angulation γ, constant all the time on the turning axle direction of photosensitive drums 16.
In addition, as the material of support component 70 and holding member 82, the high resin materials of sliding such as preferred polyacetal (POM) are so that support component 70 can slide swimmingly in holding member 82 inside.In addition, as shown in Figure 9, the sliding friction surface 70A, the 82A that are set as support component 70 and the upper side of holding member 82 are parallel with sliding friction surface 70B, the 82B of lower side, and both sides' sliding friction surface 70A, 82A, 70B, 82B are parallel with virtual line L1.The compression aspect that constitutes thus 84 pairs of photosensitive drums 16 of elasticity cleaning part is constant all the time.Namely, this elasticity cleaning part 84 constitutes: as the edge part 85 of the boundary member of lower surface 84A and lateral surface 84B, be assembled into and be crimped under the state that is not attended by deflection deformation on photosensitive drums 16 surfaces (side face), and make edge part 85 to radially the nipping of photosensitive drums 16 by means of the plus-pressure (acting force) of this volute spring 90, thereby by making not deflection deformation of edge part 85() elastic deformation (compression deformation) obtains required plus-pressure.
In addition, when photosensitive drums 16 rotation, 84 effects have friction force to the elasticity cleaning part, but because this friction force acts on direction with above-mentioned compression aspect quadrature, therefore elasticity cleaning part 84 is not vulnerable to the impact of friction force, thereby can apply required plus-pressure to photosensitive drums 16 consistently all the time.
Yet, strictly, due to the elastic deformation that impact and the elasticity cleaning part 84 in the support component 70 that slides and the gap between holding member 82 are followed photosensitive drums 16 rotations, stopped, making position upper generation displacement on photosensitive drums 16 surfaces (side face) of contact point Q2.But, more small because this displacement is between tens of microns～hundreds of microns, therefore can ignore.
Next, the effect of cleaning device 28 of the 4th embodiment of this structure is described.In addition, omit illustrating the effect that is equal to above-mentioned the first embodiment.The elasticity cleaning part 84 of the 4th embodiment is bonding and be supported on the lateral surface of support component 70, this support component 70 be located at slidably with the bonding holding member 82 of the outside surface of clearer shell 30 in, load to the surface (side face) of photosensitive drums 16 by volute spring 90, thereby make this edge part 85 photosensitive drums 16 surfaces (side face) of nipping with predetermined pressure.
Therefore, this elasticity cleaning part 84 produces elastic deformation by means of the rotary actuation of photosensitive drums 16, thereby the transfer printing residual toner Nt that remains in photosensitive drums 16 surfaces is scraped.At this, because this elasticity cleaning part 84 is billet shape as described above, caused turnup and passivation when therefore being difficult for being created in elongate in shape (scraper plate shape).In addition, owing to being difficult for producing deflection deformation, so also be difficult for producing the vibration mode that becomes the factor that produces the ring sound.
In fact, in order to confirm to suppress the effect of this turnup, in order to increase the friction factor on photosensitive drums 16 surfaces, make the electric current of supplying with charger 18 become the generation that common twice increases discharge product as stress condition.And then, will be concerning elasticity cleaning part 84, the toner effective range amount that will become on every die of stress condition is carried out lettering with shades of colour 0.5%, thereby has reduced the amount that arrives elasticity cleaning part 84 as the toner of lubricant.
Consequently, in the situation that use has the elasticity cleaning part 160(of comparative example with reference to Figure 19) existing cleaning device, can confirm, three photoconductive drum units 27 in four photo-conductor units 27 are in operation and have produced turnup.On the other hand, when using the cleaning device 28 of the 4th embodiment, because elasticity cleaning part 84 is not attended by deflection deformation, therefore turnup does not all occur in four photo-conductor units 27.
Below, in order to confirm damaged inhibition, as stress condition will height the foreign matter G of 50 μ m left and right be attached on the surface of photosensitive drums 16, check when photosensitive drums 16 is often carried out 500 circle (turning) whether have damaged.In addition, in order to confirm basic clean-up performance, continuous supplying is given the A3 paper using of three solid coatings (image that the image density with 100% forms) on whole of image-region, and the wiping whether evaluation produces toner falls.
Consequently, in the situation that having 28, four photo-conductor units 27 of cleaning device of the elasticity cleaning part 60 of the first embodiment, use can find that all toner wipes after 500 weeks.In addition, the result of observing elasticity cleaning part 60 is, with wipe corresponding position on found damaged.
On the other hand, in the situation that having 28, four photo-conductor units 27 of cleaning device of the elasticity cleaning part 84 of the 4th embodiment, use do not find that all toner wipes after 500 circles.In addition, the result of observation elasticity cleaning part 84 is to have found slight edge damage, but do not produced damaged.
Therefore, next, whether in the cleaning device 28 of the elasticity cleaning part 84 with the 4th embodiment, checking when often carrying out 500 circle has toner to wipe.Consequently, four photo-conductor units 27 are wiped and are found to have the zero hour that falls inhomogeneous toner occurs, and have occured to wipe between general 1500 circle～2500 circles.In addition, the result of observing elasticity cleaning part 84 is, with wipe corresponding position on found damaged.That is, can confirm: compare with the elasticity cleaning part 60 of the first embodiment, the elasticity cleaning part 84 of the 4th embodiment has the damaged preventing effectiveness of three times～five times.
It is the reasons are as follows: as shown in the analog result of Figure 12 A and Figure 12 B, for the elasticity cleaning part 60 of the first embodiment, its edge part 65 is evaded foreign matter G by means of the elasticity of rubber, therefore has due to fatigue break easily to cause damaged tendency.Namely, elasticity cleaning part 84 for the 4th embodiment, owing to being the mode of exerting pressure with by 90 pairs of photosensitive drums 16 of volute spring, therefore as shown in the analog result of Figure 13 A and Figure 13 B, with respect to foreign matter G, edge part 85 is easily kept out of the way (evading) to holding member 82 sides, and the plus-pressure of edge part 85 (load) is for example 1/2 can proving effective of the first embodiment.
In addition, for the inhibition of the sound of confirming to ring, under the appreciation condition identical with above-mentioned the first embodiment, the cleaning device 28 of elasticity cleaning part 84 with the 4th embodiment is implemented cleaning.Consequently, in the situation that use has the cleaning device 28 of the elasticity cleaning part 84 of the 4th embodiment, almost do not produce the ring sound.Thus, can confirm that initial clean-up performance is no problem.
Next, the 5th embodiment is described.Figure 14 means the summary side view of the periphery of the elasticity cleaning part 86 in the 5th embodiment of cleaning device 28, and Figure 15 means elasticity cleaning part 86 in the 5th embodiment of cleaning device 28 and the summary front view of support component 70.In the 5th embodiment, form with above-mentioned the 4th embodiment difference unit that only is to exert pressure the leaf spring 92 that lateral plan is roughly " U " font.Therefore, be marked with same label at the position that is equal to above-mentioned the 4th embodiment, and omit and illustrate (also comprising effect).In addition, the elasticity cleaning part 84 of the elasticity cleaning part 86 of the 5th embodiment and the 4th embodiment is equal to.
As shown in figure 15, this leaf spring 92 is along the elongated shape of turning axle direction of photosensitive drums 16.Therefore, as shown in figure 14, the elasticity cleaning part 86 that is supported on support component 70 is loaded (pressurization) by means of the acting force of leaf spring 92, the edge part 87 of elasticity cleaning part 86 is with predetermined pressure photosensitive drums 16 surfaces (side face) of nipping, and this moment, this pressure is applied equably along the turning axle direction of photosensitive drums 16.Thereby, in the situation of the cleaning device 28 of the 5th embodiment, be difficult for that more toner occurs and wipe.
In addition, in this case, be arranged on the medial surface 70C(back side of support component 70 due to the unit of exerting pressure (leaf spring 92)), therefore for example making axle (diagram is omitted) is that the longitudinally both ends of support component 70 are outstanding from the sense of rotation of photosensitive drums 16, this compares with the structure that the unit of exerting pressure is set on this axle, need not additional space near the longitudinally both ends of support component 70.That is, same with above-mentioned the 4th embodiment when constituting the structure shown in Figure 15, can realize the miniaturization of imaging device 10.
Next, the 6th embodiment is described.Figure 16 means the summary side view of the periphery of the elasticity cleaning part 88 in the 6th embodiment of cleaning device 28, Figure 17 amplifies the summary side view that the elasticity cleaning part 88 in the 6th embodiment of cleaning device 28 represents, Figure 18 means that elasticity cleaning part 88 in the 6th embodiment is with respect to the key diagram of the contact condition of photosensitive drums.In addition, be marked with same numeral on the position that is equal to above-mentioned the 3rd embodiment, and omit and illustrate.
The elasticity cleaning part 88 of the 6th embodiment is made of the resilient material identical with the elasticity cleaning part 68 of above-mentioned the 3rd embodiment, and same with the elasticity cleaning part 68 of the 3rd embodiment, cross sectional shape forms roughly equilateral quadrilateral (roughly square).By making cross sectional shape form roughly equilateral quadrilateral (roughly square), it constitutes: with exist like that the situation of a side that becomes long limit to compare as the 4th embodiment with the elasticity cleaning part 84,86 as shown in the 5th embodiment, can suppress the structure of this long side deflection deformation.
In addition, from preventing the purpose of deflection deformation, elasticity cleaning part 88 is preferably its cross sectional shape and forms roughly equilateral quadrilateral (roughly square), if but do not produce deflection deformation, need not one be decided to be equilateral.In addition, in foursquare situation roughly, from preventing the viewpoint of deflection deformation, preferably each limit is than for about for example 1:1～1:1.2 at elasticity cleaning part 88.In addition, this elasticity cleaning part 88 constitutes: its edge part 89 that contacts with photosensitive drums 16 is cut to 90 ° at least.
It is in order to obtain the edge definition as elasticity cleaning part 88 that edge part 89 is cut to the reason of 90 °.That is, for to effect interception power such as transfer printing residual toner Nt, need processing accurately to be used for being crimped on the edge part 89 on photosensitive drums 16 surfaces (side face), from the processibility viewpoint, cut into 90 ° and the most easily reach edge definition.In addition, need not except edge part 89 must be 90 °.
And the elasticity cleaning part 88 of the 6th embodiment has: be positioned at than more depending on lower surface (first surface) 88A of the sense of rotation upstream side of photosensitive drums 16 with the opposed edge part 89 of photosensitive drums 16; Be positioned at than with the opposed edge part 89 of photosensitive drums 16 more by lateral surface (the second face) 88B in the sense of rotation downstream of photosensitive drums 16; With medial surface (three face) 88C of this lateral surface 88B opposition side in abutting connection with lower surface 88A; And with upper surface (fourth face) 88D of lower surface 68A opposition side in abutting connection with lateral surface 88B and medial surface 88C.
And the support component 80 in this situation forms the bearing shape of joining with elasticity cleaning part 88 3 faces.That is, the part that is positioned at clearer shell 30 sides of the part that is positioned at clearer shell 30 sides of the lower surface 88A of elasticity cleaning part 88, upper surface 88D and medial surface 88C bonding (fixing) are on the lateral surface that is spill of support component 80.Thus, constitute the structure that can suppress more reliably the microvibration of elasticity cleaning part 88.
In addition, the medial surface 80C(back side of this support component 80) end of volute spring 90 as the unit of exerting pressure is installed.Same with above-mentioned the 4th embodiment, this volute spring 90 is at the medial surface 80C(back side of support component 80) separate predetermined space and be arranged on many places (for example two places), pressure can be applied on the sense of rotation of photosensitive drums 16 equably thereby be adjusted to.
By the volute spring 90(unit of exerting pressure) institute's applied pressure is by under various conditions spatter property and decisions such as discharge product removability and maintenance thereof, and the plus-pressure of the 88 pairs of photosensitive drums 16 of elasticity cleaning part in the 6th embodiment also is set as for example 19.6N/m(2gf/mm).That is, the plus-pressure of the elasticity cleaning part 88 of the 6th embodiment also can suppress be the first embodiment elasticity cleaning part 60 stressed 1/2.
At this, the plus-pressure of this elasticity cleaning part 88 can the reasons are as follows than plus-pressure little (can be for example 1/2) of the elasticity cleaning part 60 of the first embodiment: same with above-mentioned the 4th embodiment, due to the passivation that does not have the elasticity cleaning part 88 that is caused by deflection deformation, do not improve in advance initial value so do not need to estimate passivation as the elasticity cleaning part 60 of the first embodiment; Even 88 wearing and tearing of elasticity cleaning part, volute spring 90 also applies constant load (pressure) all the time.
On the other hand, the other end of volute spring 90 is arranged on the inner bottom surface 82C of holding member 82, this holding member 82 is taken in slidably support component 80 and is the elongated rectangular case shape that a face opens wide, and support component 80 is retained as under the state that is loaded to photosensitive drums 16 sides by this volute spring 90 can be in holding member 82 slides within.And the outer bottom 82D of this holding member 82 installs (bonding) on the outside surface of the open end 30A of the upper side of clearer shell 30.
At this, the compression aspect on the surface (side face) of the 88 pairs of photosensitive drums 16 of elasticity cleaning part in the 6th embodiment is also identical with above-mentioned the 4th embodiment.Namely, as shown in figure 16, compression aspect is set as: the bearing of trend that is roughly parallel to the virtual line L1 that edge part 89 with the rotary middle point Q1 of photosensitive drums 16 and elasticity cleaning part 88 contacts (opposed) with photosensitive drums 16 surfaces (side face) contact point Q2 couples together.
This be because, the scraping property when mainly useful for utilizes elasticity cleaning part 88 to clean and maintenance be that towards the stress (pressure) of the rotary middle point Q1 of photosensitive drums 16 direction, the direction of giving efficiently this stress (pressure) is above-mentioned compression aspect.In addition, as shown in figure 16, the imaginary center line L2 of the horizontal direction of photosensitive drums 16 and virtual line L1 angulation γ, constant all the time on the turning axle direction of photosensitive drums 16.
In addition, as the material of support component 80 and holding member 82, the high resin materials of sliding such as preferred polyacetal (POM) are so that support component 80 can slide swimmingly in holding member 82 inside.In addition, as shown in figure 17, the sliding friction surface 80A, the 82A that are set as support component 80 and the upper side of holding member 82 are parallel with sliding friction surface 80B, the 82B of lower side, and both sides' sliding friction surface 80A, 82A, 80B, 82B are parallel with virtual line L1.The compression aspect that constitutes thus 88 pairs of photosensitive drums 16 of elasticity cleaning part is constant all the time.
Namely, this elasticity cleaning part 88 constitutes: owing to being the billet shape same with the 3rd embodiment, therefore as the edge part 89 of the boundary member between lower surface 88A and lateral surface 88B, be assembled into and be crimped under the state that is not attended by deflection deformation on photosensitive drums 16 surfaces (side face), and by means of the plus-pressure (acting force) of this volute spring 90, edge part 89 is radially nipped in photosensitive drums 16, thereby by making not deflection deformation of edge part 89() elastic deformation (compression deformation) obtains required plus-pressure.
In addition, when photosensitive drums 16 rotation, 88 effects have friction force to the elasticity cleaning part, but because this friction force acts on direction with above-mentioned compression aspect quadrature, therefore elasticity cleaning part 88 is not vulnerable to the impact of friction force, thereby can apply required plus-pressure to photosensitive drums 16 consistently all the time.
Yet, strictly, follow the rotation of photosensitive drums 16, the elastic deformation that stops due to the support component 80 that slides and impact and the elasticity cleaning part 88 in the gap between holding member 82, the position that makes contact point Q2 is upper on photosensitive drums 16 surfaces (side face) produces displacement.But, more small because this displacement is between tens of microns～hundreds of microns, therefore can ignore.
Next, the effect of cleaning device 28 of the 6th embodiment of this structure is described.In addition, omit illustrating the effect that is equal to above-mentioned the 3rd embodiment.The elasticity cleaning part 88 of the 6th embodiment is bonding and be supported on the lateral surface of support component 80, this support component 80 be located at slidably with the bonding holding member 82 of the outside surface of clearer shell 30 in, load to the surface (side face) of photosensitive drums 16 by volute spring 90, thereby make this edge part 89 photosensitive drums 16 surfaces (side face) of nipping with predetermined pressure.
Therefore, this elasticity cleaning part 88 produces elastic deformation by means of the rotary actuation of photosensitive drums 16, thereby the transfer printing residual toner Nt that remains in photosensitive drums 16 surfaces is scraped.At this, because this elasticity cleaning part 88 is billet shape as described above, caused turnup and passivation when therefore being difficult for being created in elongate in shape (scraper plate shape).
Particularly, this elasticity cleaning part 88 constitutes: lower surface 88A, medial surface 88C, these three faces of upper surface 88D are maintained on support component 80, so its action is further suppressed than the action that two faces are maintained at the elasticity cleaning part 86 of the elasticity cleaning part 84 of the 4th embodiment on support component 70 and the 5th embodiment.Thereby, compare with the elasticity cleaning part 84 of the 4th embodiment and the elasticity cleaning part 86 of the 5th embodiment, can further suppress this elasticity cleaning part 88 turnups and passivation.
In addition, same with above-mentioned the 3rd embodiment, this elasticity cleaning part 88 is difficult for deflection deformation occurs, so also be difficult for producing the vibration mode of the factor that becomes the ring sound.Particularly, this elasticity cleaning part 88 constitutes its lower surface 88A, medial surface 88C, three faces of upper surface 88D are maintained on support component 80, thereby its action further is limited, and the sound that therefore rings is also further suppressed.
In fact, in order to confirm the inhibition of this ring sound, implement cleaning under the appreciation condition identical with above-mentioned the first embodiment, yet in the situation that use has the cleaning device 28 of the elasticity cleaning part 88 of the 6th embodiment, almost do not produce the ring sound.In addition, in order to confirm basic clean-up performance, same with the evaluation method of above-mentioned the 3rd embodiment, continuous supplying is given the A3 paper using of three solid coatings (image that the image density with 100% forms) on whole of image-region, and estimate the wiping whether produce toner and fall, yet toner is not wiped, and initial clean-up performance is no problem.
In addition, for the damaged preventing effectiveness of the elasticity cleaning part 88 of confirming the 6th embodiment, implement validation test under the appreciation condition identical with above-mentioned the 4th embodiment.Consequently, in the situation that use has the cleaning device 28 of the elasticity cleaning part 88 of the 6th embodiment, four photo-conductor units 27 are not until 1500 circles all find to wipe phenomenon, thereby can confirm: compare with the cleaning device 28 of the elasticity cleaning part 60 with first embodiment, elasticity cleaning part 88 has the damaged preventing effectiveness more than three times.
And then, for the permanance of the elasticity cleaning part 88 of estimating the 6th embodiment, implement the running test.Opinion scale is operation circle (turn) number of photosensitive drums 16 before the generation cleaning is bad, and itself and existing (the elasticity cleaning part 160 with comparative example) cleaning device are relatively also utilized the running test and try to achieve.In addition, in order to get rid of elasticity cleaning part 88,160 factor in addition, suitably change elasticity cleaning part 88,160 consumables in addition in this running test.
Consequently, existing cleaning device for the elasticity cleaning part 160 with comparative example, at 355k circle (355,000 turns) lower can clean bad, and for the cleaning device 28 of the elasticity cleaning part 88 with the 6th embodiment, can clean bad under 1820k circle (1820,000 turn).That is, can confirm, the permanance of cleaning device 28 with elasticity cleaning part 88 of the 6th embodiment is brought up to about five times.
In addition, after completing the running test, elasticity cleaning part 88 is taken out from photo-conductor unit 27, the factor of the bad generation of investigation cleaning, can judge: the elasticity cleaning part 160 of existing (comparative example) causes plus-pressure decline because of passivation (aging) and wearing and tearing, and the elasticity cleaning part 88 of the 6th embodiment is caused by the wearing and tearing of edge part 89.Thus, can reaffirm, use the elasticity cleaning part 88 that is not attended by deflection deformation and the permanance that the mode of exerting pressure the unit (volute spring 90 and leaf spring 92 etc.) of exerting pressure is set to improve.
In addition, the significant dimensions in the elasticity cleaning part 88 of the 6th embodiment is the height α shown in Figure 17 and overhang β.The concrete Deformation analyses of implementing edge part 89, consequently can judge: the zone relevant with distortion is that the front end from edge part 89 plays the zone that lower surface 88A side and lateral surface 88B side are all 500 μ m left and right at least.Thereby, in order to act on the required plus-pressure of cleaning, preferred heights α more than 500 μ m, overhang β is also more than 500 μ m.
In addition, from preventing the viewpoint of deflection deformation, be preferably overhang β≤height α.If this is because height α is less than overhang β, can become the such structure of semi-girder, becoming, deflection deformation (turnup) easily occurs.Aspect cleaning function, the upper limit of height α and overhang β without particular limitation of, but from the space of configuration elasticity cleaning part 88 and the viewpoint of cost degradation, be preferably below the 20mm left and right.
In addition, in the such mode of the 4th embodiment～the 6th embodiment, from the viewpoint of clean-up performance, particularly importantly each edge part 85,87,89 states in when cleaning.Figure 18 represents the static state of the edge part 89 in the elasticity cleaning part 88 of the 6th embodiment as an example, each edge part 85,87 when photosensitive drums 16 moves along the arrow A direction in each elasticity cleaning part 84,86,88,89 dynamic deformation state are identical with above-mentioned Fig. 8 B.
That is, as shown in Fig. 8 B, each elasticity cleaning part 84,86, each edge part 85,87,89 of 88 are also larger in the regional internal strain of tens of microns from front end, by this distortion, can obtain required plus-pressure.Each elasticity cleaning part 84,86,88 conversely speaking, as long as the desired distortion of generation in the zone of tens of microns from its front end can obtain required plus-pressure, is brought into play good cleaning function.
Apply this plus-pressure, as long as radially press photosensitive drums 16 surfaces, each edge part 85,87,89 is nipped and produce elastic deformation (compression deformation) and get final product.In the 4th embodiment～the 6th embodiment, regulate its plus-pressure by means of the unit of exerting pressure (volute spring 90 or leaf spring 92).In addition, elasticity cleaning part 84,86,88 in the 4th embodiment～the 6th embodiment forms rectangular shape, the turnup phenomenon can not occur, even therefore can use under the larger condition of set angle θ (with reference to Figure 19), can further improve clean-up performance yet.
In addition, each elasticity cleaning part 60,66,68,84,86,88 of above-mentioned the first embodiment～the 6th embodiment also can be applicable to the toner that the transfer printing residual toner that remains on intermediate transfer belt 24 is removed is removed device (cleaning device) 38.In addition, each face (first surface～fourth face) in each elasticity cleaning part 60,66,68,84,86,88 of above-mentioned the first embodiment～the 6th embodiment is not limited to illustrated plane, also comprises the form that is made of curved surface or a plurality of plane.
In addition, the shape of the open end 30A of the upper side of clearer shell 30 is not limited to illustrated shape, have again, support component 70 and 80, holding member 82 contacts or bonding part can be made of the part that is independent of clearer shell 30, also can constitute the structure that anchors at integratedly on clearer shell 30.
In addition, in the situation that the elasticity cleaning part 60 of the first embodiment, just can make by improveing existing cleaning device (for example having the cleaning device of scraping tabular elasticity cleaning part 160), so have advantages of and to make with low cost.Have again, owing to being all the billet shape in the elasticity cleaning part 66,68,84,86 of the second embodiment～the 6th embodiment, 88 situation, therefore having advantages of and to reduce and elasticity cleaning part 66,68,84,86,88 relevant manufacturing costs.
In addition, in the situation that the second embodiment～the 6th embodiment, compare with the situation of the first embodiment, can utilize be equipped with the space of scraping tabular elasticity cleaning part 60 configure not shown except electrical equipment etc., but therefore have advantages of effective utilization of implementation space.Have again, in the situation that the second embodiment～the 6th embodiment, can only be equipped with rectangular shape elasticity cleaning part 66,68,84,86,88 with respect to support component 70,80 fixing, therefore compare with the situation of the first embodiment, have advantages of sheet metal 76 fixing substrates such as grade that do not need to scrape for fixed support tabular elasticity cleaning part 60.
Above-mentioned embodiment provides as purpose so that example of the present invention to be described.The invention is not restricted to above-mentioned embodiment.For a person skilled in the art, certainly can obtain other distortion in the scope that does not deviate from purport of the present invention.Above-mentioned embodiment is selected for principle of the present invention and practicality are described, it will be understood by those skilled in the art that the specific use that the diversity that can utilize embodiments of the present invention and various variation are applied to expect.Scope of the present invention is defined by described claim and equivalent thereof.

Claims (15)

1. a cleaning device, is characterized in that,
This cleaning device comprises:
The elasticity cleaning part, its be used for keep image as the Surface Contact of holder and clean this surface,
The support component that a plurality of faces of above-mentioned elasticity cleaning part are supported,
To the above-mentioned unit of exerting pressure of pressing above-mentioned support component as holder, and
Holding unit, above-mentioned support component and the above-mentioned unit of exerting pressure are maintained at the inside of above-mentioned holding unit, and above-mentioned support component is retained as and can moves along rectilinear direction in the inside of above-mentioned holding unit,
Above-mentioned elasticity cleaning part has:
Be positioned at than more leaning on the first surface of the sense of rotation upstream side of above-mentioned picture holder with the opposed edge part of above-mentioned picture holder;
Be positioned at than with the opposed edge part of above-mentioned picture holder more by second of the sense of rotation downstream of above-mentioned picture holder; And
The 3rd in abutting connection with above-mentioned first surface with above-mentioned second opposition side,
Above-mentioned first surface and above-mentioned the 3rd face are fixed on above-mentioned support component.
2. cleaning device according to claim 1, is characterized in that,
Above-mentioned elasticity cleaning part is tabular, above-mentioned cleaning device has fixing substrate, this fixing substrate along above-mentioned as holder axially one of above-mentioned elasticity cleaning part distolaterally is fixed support, another of above-mentioned elasticity cleaning part is distolateral to be supported on above-mentioned support component.
3. cleaning device according to claim 1, is characterized in that,
The direction of exerting pressure of the above-mentioned unit of exerting pressure is roughly parallel to above-mentioned central point as holder and above-mentioned elasticity cleaning part and the above-mentioned rectilinear direction that couples together as the contact point of the opposed edge part of holder.
4. the described cleaning device of any one according to claim 1～3, is characterized in that,
Above-mentioned elasticity cleaning part is being crimped on the surface of above-mentioned picture holder under the state that is not attended by the flexible deformation.
5. the described cleaning device of any one according to claim 1～3, is characterized in that,
The cross section of above-mentioned elasticity cleaning part forms roughly quadrilateral, and above-mentioned elasticity cleaning part have with the above-mentioned first surface opposition side fourth face in abutting connection with above-mentioned second and above-mentioned the 3rd, above-mentioned fourth face also is fixed on above-mentioned support component.
6. the described cleaning device of any one according to claim 1～3, is characterized in that,
To be made as fourth face with the face of above-mentioned rotating shaft direct cross as holder,
The length of the part that above-mentioned first surface is exposed and intersects with above-mentioned fourth face from above-mentioned support component is made as β, and above-mentioned second length with the crossing part of above-mentioned fourth face is made as in the situation of α, satisfies α 〉=β.
7. cleaning device according to claim 4, is characterized in that,
To be made as fourth face with the face of above-mentioned rotating shaft direct cross as holder,
The length of the part that above-mentioned first surface is exposed and intersects with above-mentioned fourth face from above-mentioned support component is made as β, and above-mentioned second length with the crossing part of above-mentioned fourth face is made as in the situation of α, satisfies α 〉=β.
8. cleaning device according to claim 6, is characterized in that,
The cross section of above-mentioned elasticity cleaning part forms roughly square.
9. the described cleaning device of any one according to claim 1～3, is characterized in that,
Above-mentioned cleaning device also comprise to the clearer shell of the surperficial opposed side opening of above-mentioned picture holder, above-mentioned elasticity cleaning part is maintained on above-mentioned clearer shell via above-mentioned support component.
10. an imaging device, is characterized in that,
This imaging device comprises:
The picture holder;
Make the charging device of the surface charging of above-mentioned picture holder;
Exposure device, it makes the face exposure of the above-mentioned picture holder of charging by above-mentioned charging device, and forms electrostatic latent image on this surface;
Display, the electrostatic latent image video picture that it utilizes developer to make to form by above-mentioned exposure device;
Middle transfer body, it is to video picture and the image that keeps on above-mentioned surface as holder carry out transfer printing by above-mentioned display; And
The described cleaning device of any one in claim 1～3, it is removed not by above-mentioned middle transfer body transfer printing and remaining in the lip-deep developer of above-mentioned picture holder.
11. imaging device according to claim 10 is characterized in that,
To be made as fourth face with the face of above-mentioned rotating shaft direct cross as holder,
The length of the part that above-mentioned first surface is exposed and intersects with above-mentioned fourth face from above-mentioned support component is made as β, and above-mentioned second length with the crossing part of above-mentioned fourth face is made as in the situation of α, satisfies α 〉=β.
12. an imaging device is characterized in that,
This imaging device comprises:
The picture holder;
Make the charging device of the surface charging of above-mentioned picture holder;
Exposure device, it makes the face exposure of the above-mentioned picture holder of charging by above-mentioned charging device, and forms electrostatic latent image on this surface;
Display, the electrostatic latent image video picture that it utilizes developer to make to form by above-mentioned exposure device;
Middle transfer body, it is to video picture and the image that keeps on above-mentioned surface as holder carry out transfer printing by above-mentioned display; And
The described cleaning device of any one in claim 1～3, it is removed not from above-mentioned middle transfer body and is transferred on recording medium and remaining in the lip-deep developer of this middle transfer body.
13. imaging device according to claim 12 is characterized in that,
To be made as fourth face with the face of above-mentioned rotating shaft direct cross as holder,
The length of the part of above-mentioned first surface being exposed from above-mentioned support component and intersecting with above-mentioned fourth face is made as β, and above-mentioned second length with the crossing part of above-mentioned fourth face is made as in the situation of α, satisfies α 〉=β.
14. a picture holder unit is characterized in that,
This comprises as the holder unit:
The picture holder; With
With the described cleaning device of any one in the integrated claim 1～3 of above-mentioned picture holder,
Above-mentioned as installing and removing with respect to imaging device the holder unit.
15. picture holder according to claim 14 unit is characterized in that,
To be made as fourth face with the face of above-mentioned rotating shaft direct cross as holder,
The length of the part that above-mentioned first surface is exposed and intersects with above-mentioned fourth face from above-mentioned support component is made as β, and above-mentioned second length with the crossing part of above-mentioned fourth face is made as in the situation of α, satisfies α 〉=β.
CN2008101376628A 2007-08-21 2008-07-08 Cleaning device, image forming device and image holder unit Active CN101373365B (en)

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