CN101414142B

CN101414142B - Developing device and image forming apparatus having the same

Info

Publication number: CN101414142B
Application number: CN2008100979488A
Authority: CN
Inventors: 船田敦; 千原朋义
Original assignee: Fuji Xerox Co Ltd
Current assignee: Fujifilm Business Innovation Corp
Priority date: 2007-10-17
Filing date: 2008-05-16
Publication date: 2012-02-08
Anticipated expiration: 2028-05-16
Also published as: KR101081922B1; JP4640401B2; JP2009098438A; CN101414142A; KR20090039586A

Abstract

The invention provides a developing device, comprising: a developer retaining body; a developer supplier; a supply feeding member; a developer agitator; a clapboard arranged between the developer supplier and the developer agitator and used for moving the developer through holes; an agitating feeding member used for feeding the developer received in the developer agitator along a rotation axial direction which is opposite to the feeding direction of the developer of the supply feeding member; a recovering roller used for recovering a toner and returning the toner into the developer agitator; a scraping member which is pressed against the rotary recovering roller and scrapes the toner recovered by the recovering roller; and a feeding member arranged, in a horizontal direction, between the recovering roller and the agitating feeding member, and in a vertical direction, between the agitating feeding member and the supply feeding member, and used for feeding the toner scraped by the scraping member and the toner fed by the agitating feeding member along a direction opposite to the feeding direction of the agitating feeding member.

Description

Developing apparatus and used the image processing system of this device

Technical field

The present invention relates to a kind of developing apparatus and used the image processing system of this device.

Background technology

As existing image processing system; In the developing apparatus of the electro-photography apparatus that has for example used electrofax to handle; Keep in the process on the body utilizing electric field to make developer keep toner that body kept to be attached to picture, currently have a following problem: charged inadequate toner can't be attached to picture and keep on the body, and produce the phenomenon of so-called toner flying dust; That is, it keeps body and developer to keep floating between the body at picture.

To this problem, known following method: the recovery roller that reclaims floating toner is set in developing apparatus, reclaims the floating toner that in developing apparatus, has reclaimed, make it reuse (for example, with reference to patent documentation 1) as developer.In this patent documentation 1, publicity following structure, its utilization is arranged on the recovery roller of developer roll below, and floating toner is recovered in the developer container, the floating toner that utilizes scraper plate to reclaim is swept, and returns the supply helical screw feeder.

Patent documentation 1: the spy open the 2006-91155 communique (embodiment, Fig. 1)

Summary of the invention

But, return the floating toner of supplying with helical screw feeder, before receiving fully stirring again, keep body to supply with to developer once more probably from supplying with helical screw feeder.Toner need apply required carried charge through the frictional electrification with carrier when stirring, do not receive the floating toner that stirs again fully, becomes the reason that when developer keeps body to develop to picture maintenance body, produces the toner flying dust once more.

The present invention proposes in view of above situation, and it solves problem and does, a kind of developing apparatus is provided and has used the image processing system of this device, its through the floating toner that reclaims is implemented stir again fully prevent once more floating, produce the toner flying dust.

[1] according to an aspect of the present invention, a kind of developing apparatus is characterized in that, has: developer keeps body, and it keeps developer, the toner that this developer comprises carrier and keeps body to supply with to picture; The developer replenishing chamber, it accommodates the developer that keeps body to supply with to aforementioned developer; Supply with transfer unit, it has turning axle, and will be housed in the indoor developer of aforementioned developer replenishing along this turning axle conveying; The developer teeter chamber, it is arranged on the downside of aforementioned developer replenishing chamber on vertical direction, and is housed in round-robin developer between this developer teeter chamber and the aforementioned developer replenishing chamber; Dividing plate, it is separated aforementioned developer replenishing chamber and aforementioned developer teeter chamber, simultaneously, between aforementioned developer replenishing chamber and aforementioned developer teeter chamber, utilizes through hole to make developer movement; Stir transfer unit, it has turning axle, and the developer that will be housed in the aforementioned developer teeter chamber is carried along the opposite direction of the developer throughput direction of this axial rotary and aforementioned supply transfer unit; Reclaim roller, it rotatably is arranged on the sense of rotation downstream that picture keeps body with respect to the relative portion that aforementioned developer keeps body and said image to keep body, and reclaims toner, makes it return aforementioned developer teeter chamber; Scrape and get parts, itself and the aforementioned recovery roller butt that rotates, and scrape and get the toner that reclaims by aforementioned recovery roller; And transfer unit; It in the horizontal direction; Be arranged between aforementioned recovery roller and the aforementioned stirring transfer unit; And on vertical direction, be arranged on aforementioned stirring transfer unit and supply with between the transfer unit, and will get parts and scrape the toner got and carry to the direction opposite by aforementioned scraping with the throughput direction of aforementioned stirring transfer unit by the toner that aforementioned stirring transfer unit is carried.

[2] in the developing apparatus that [1] relates to, this developing apparatus has in inside: the developer replenishing chamber, and it is provided with aforementioned supply transfer unit; And the developer teeter chamber, it is provided with aforementioned stirring transfer unit, aforementioned recovery roller, aforementioned scraping and gets parts and aforementioned transfer unit.

[3] in the developing apparatus that [1] relates to, aforementioned recovery roller, aforementioned scraping are got parts and aforementioned transfer unit and are arranged on the top with respect to aforementioned stirring transfer unit, and the toner that makes recovery falls and returns aforementioned stirring transfer unit.

[4] according to another aspect of the present invention, a kind of image processing system, it has: rotatable picture keeps body, and it forms electrostatic latent image; And above-mentioned [1] described developing apparatus, but it makes the electrostatic latent image that keeps forming on the body at this picture become video

[5] in the image processing system that [4] relate to, this image processing system has in inside: the developer replenishing chamber, and it is provided with aforementioned supply transfer unit; And the developer teeter chamber, it is provided with and stirs transfer unit, aforementioned recovery roller, aforementioned scraping and get parts and aforementioned transfer unit.

[6] in the image processing system that [4] relate to, aforementioned recovery roller, aforementioned scraping are got parts and aforementioned transfer unit and are arranged on the top with respect to aforementioned stirring transfer unit, and the toner that makes recovery falls and returns aforementioned stirring transfer unit.

The effect of invention

Scheme according to [1]; Even developer is deposited near the transfer unit the through hole between developer teeter chamber and the developer replenishing chamber; Also because developer can be transported to the upstream side of the developer throughput direction that stirs transfer unit along the developer throughput direction of transfer unit; Stir more fully thereby can be stirred transfer unit, and then can be with being offered the developer replenishing chamber by well-beaten developer.

According to the scheme of [4], can construct image processing system simply, it has the developing apparatus that in the developer teeter chamber, can fully stir developer.

Description of drawings

Fig. 1 is a key diagram of representing the summary of developing apparatus that application embodiment of the present invention relates to and the image processing system that has used this device.

Fig. 2 is the key diagram of schematic configuration example of the integrally-built electro-photography apparatus of the image processing system that relates to of expression embodiment 1.

Fig. 3 is the longitudinal profile key diagram of the developing apparatus that relates to of embodiment 1.

Fig. 4 is the axial section key diagram of the developing apparatus that relates to of embodiment 1.

Fig. 5 is the longitudinal profile key diagram of the developing apparatus that relates to of embodiment 2.

Fig. 6 is the axial section key diagram of the developing apparatus that relates to of embodiment 2.

Fig. 7 is the longitudinal profile key diagram of the developing apparatus that relates to of embodiment 3.

Fig. 8 is the axial section key diagram of the developing apparatus that relates to of embodiment 3.

Fig. 9 is the key diagram of wanting portion of the mode of texturing of the developing apparatus that relates to of expression embodiment 3.

Embodiment

At first, describe for the summary of having used embodiment of the present invention.

The summary of ◎ embodiment

Fig. 1 representes the image processing system of realizing that embodiment of the present invention relates to.

In the figure, image processing system has: rotatable picture keeps body 1, and it forms electrostatic latent image; And developing apparatus 2, but it makes the electrostatic latent image that keeps forming on the body at this picture become video.

, keep body 1 here, get final product, can suitably select photoreceptor, dielectric etc. so long as can form the device of electrostatic latent image as picture.In addition, for its form, can be drum type, band shape.

In addition, developing apparatus 2 has: developer container 3, and it accommodates the developer G that contains toner and carrier at least; Developer keeps body 4, and it can be arranged on the aforementioned developer container 3 rotatably, and can keep aforementioned developer G, supplies with toner to keep body 1 to picture; Developer replenishing portion 5, it is arranged on aforementioned developer container 3 inside, keeps body 4 to supply with developer G to aforementioned developer; Developer mixing part 6, it is arranged on different with developer replenishing portion 5 indoorly in aforementioned developer container 3, and stirs the developer G that should supply with to aforementioned developer replenishing portion 5; Developer recoverer 7, it is arranged on the sense of rotation downstream that picture keeps body, and reclaims floating toner with respect to the relative portion that aforementioned developer keeps body 4 and said image to keep body 1, makes it return aforementioned developer mixing part 6.

In above technical method, as developer container 3,, developer replenishing portion 5 gets final product so long as being arranged on different indoor forms with developer mixing part 6, can suitably select.

In this case, as the representation mode of developer container 3, can enumerate two cell structures or three cell structures.Two cell structures have in inside: developer replenishing chamber 3a, and it is provided with aforementioned developer replenishing portion 5; And the 3b of developer teeter chamber, it is provided with aforementioned developer mixing part 6 and aforementioned developer recoverer 7.Three cell structures have in inside: developer replenishing chamber 3a, and it is provided with aforementioned developer replenishing portion 5; The 3b of developer teeter chamber, it is provided with aforementioned developer mixing part 6; And developer recovery chamber (not shown), it is provided with aforementioned developer recoverer 7.

In addition, as developer replenishing portion 5, so long as in developer container 3; Keeping body 4 to dispose relatively with developer gets final product; For example, stir the circulate form of a plurality of circulation transfer units of carrying of developer G for the rear side setting that keeps body 4 at developer on one side, be equivalent to be arranged on the circulation transfer unit in the same chamber with developer maintenance body 4; In addition; For keeping between the body 4 at aforementioned a plurality of circulation transfer units and developer, roller shape that developer replenishing uses or the mode of scraping tabular developer replenishing parts are set, be equivalent to keep body 4 to be arranged on same indoor circulation transfer unit with aforementioned developer replenishing parts and developer.

In addition; As developer mixing part 6; Keep different indoor of body 4 so long as be arranged on, and the structure that stirs the developer G that should supply with to developer replenishing portion 5 gets final product, for example with developer; Be provided with for the rear side that keeps body 4 at developer and stir the circulate mode of a plurality of circulation transfer units of carrying of developer on one side, be equivalent to be arranged on different indoor circulation transfer units with developer maintenance body 4.

In addition, as developer recoverer 7, the relative portion that it keeps body 4 and picture to keep body 1 with respect to developer; Be arranged on the downstream that picture keeps the sense of rotation of body 1; For example, the developing regional m with respect to picture maintenance body 4 is arranged on the downstream that picture keeps the sense of rotation of body 1; Reclaim floating toner thereby can play, and make the floating toner of recovery return the effect of developer mixing part 6.

,, can enumerate following mode here: be arranged on the top with respect to aforementioned developer mixing part 6, the mode that the floating toner of recovery is fallen to aforementioned developer mixing part 6 as the representation mode of developer recoverer 7; And have the recovery part that reclaims floating toner and the floating toner that reclaimed by this recovery part is returned and the mode of the transfer unit carried to developer mixing part 6.

Below, with reference to accompanying drawing,, at length describe having used embodiment of the present invention.

Embodiment 1

Fig. 2 representes to carry the one-piece construction of embodiment 1 of the electro-photography apparatus of the so-called tandem type that has used developing apparatus of the present invention.This electro-photography apparatus goes for duplicating machine or printer as an example.

As shown in Figure 2, electro-photography apparatus has the apparatus main body 11 of imaging usefulness, in the bottom of this apparatus main body 11, is provided with and can simultaneously, the manuscript reading section 19 that can read original copy be set on the top of apparatus main body 11 to this sheet feed section 12 that installs 11 supply paper.

Here; On apparatus main body 11, carry the image forming part 14 (specifically being 14Y, 14M, 14C, 14K) of a plurality of color components (for example yellow (Y), magenta (M), blue-green (C), black (K)) that adopted the electrofax mode; Intermediate transfer belt 15 is set simultaneously; Before its toner at each color component that will be formed by each image forming part 14 looks like to be transferred on the paper, temporarily keep carrying.

In addition; The paper sheet delivery portion 13 from the paper of sheet feed section 12 that transports is set in apparatus main body 11; On the part of the paper sheet delivery path that constitutes by this paper sheet delivery portion 13, be provided with the toner from each color component of intermediate transfer belt 15 is looked like to be transferred to the transfer printing portion 16 on the paper, simultaneously; Downstream in the transfer printing portion 16 of paper sheet delivery path; Be provided for toner with transfer printing as the photographic fixing portion 17 of photographic fixing on paper,, the paper discharge portion 18 of accommodating the paper of accomplishing photographic fixing that discharges be set in the exit portion of paper sheet delivery path.

In this electro-photography apparatus, be housed in the paper in the sheet feed section 12, utilize paper sheet delivery portion 13 to be transported to transfer printing portion 16.On the other hand; By each image forming part 14 (14Y (yellow), 14M (magenta), 14C (blue-green), 14K (black)); Use the toner picture of four colors of known Electronic Photographing Technology formation, to intermediate transfer belt 15, carried to transfer printing portion 16 by transfer printing overlappingly (primary transfer).In transfer printing portion 16, the toner picture on the intermediate transfer belt 15 is transferred (secondary transfer printing) uniformly to the paper that transports, with photographic fixing portion 17 with toner as after photographic fixing is to paper, discharge to paper discharge portion 18.

In addition, in this embodiment, each image forming part 14 for example has the photoreceptor 140 of drum type like Fig. 2 and shown in Figure 3, around this photoreceptor 140, has: not shown electro-mechanical part, and it makes this photoreceptor 140 charged; Exposure portions 141 such as laser scanning device, it writes electrostatic latent image on the photoreceptor 140 after charged; As the developing apparatus 20 of development section, it utilizes the toner of each color component, but makes the electrostatic latent image on the photoreceptor 140 become video; Not shown primary transfer portion, its with the toner on the photoreceptor 140 as primary transfer to intermediate transfer belt 15; And not shown cleaning portion, its cleaning remains in the residual toner after the transfer printing on the photoreceptor 140.

Here, Fig. 3 and Fig. 4 are illustrated respectively in above-mentioned each image forming part 14 of being made up of identical structure (developing apparatus 20 as development section that uses among the 14Y～14K).

In addition, Fig. 3 is the longitudinal profile key diagram of the developing apparatus 20 that sets relatively with photoreceptor 140, and Fig. 4 is the axial section key diagram of developing apparatus 20.

In Fig. 3, developing apparatus 20 is accommodated in developer container 21 and is contained toner and carrier at two kinds of interior component developers.

And; Developing apparatus 20 has developer teeter chamber 36 and developer replenishing chamber 37 in the inside of developer container 21; This developer replenishing chamber 37 is adjacent with this developer teeter chamber 36, simultaneously with respect to developer teeter chamber 36, is positioned at the position farther apart from photoreceptor 140.In addition, the developer roll 22 that keeps body as developer is set above developer teeter chamber 36, developer replenishing chamber 37, itself and photoreceptor 140 dispose relatively, can rotate.In addition, above developer roll 22, fixing layer-thickness restriction member 29 on developer container 21, the bed thickness of the developer that its surface that is used to be limited in developer roll 22 keeps.

In addition, the dividing plate 28 of separating developer teeter chamber 36 and developer replenishing chamber 37 in developer container 21 set inside.This dividing plate 28 is as shown in Figure 4, along the whole length direction setting of developer container 21, but through

hole

33,34 is set at its both ends, thereby can in developer teeter chamber 36 and developer replenishing chamber 37, carry out moving of developer.

In Fig. 3, have in the inside of developer teeter chamber 36: sealed roller 23, it can be arranged on following position rotatably, that is, be the sense of rotation downstream of photoreceptor 140 with respect to developer roll 22, and the position relative with photoreceptor 140; Scraper plate 24, the below butt of itself and sealed roller 23; Partition wall 25, it is between developer roll 22 and the sealed roller 23, and both are separated; And,, it carries while stirring developer as the stirring transfer unit 26 of developer mixing part.This stirring transfer unit 26 is arranged on the below of the abutting part of sealed roller 23 and scraper plate 24, sealed roller 23 rotations relatively.In addition, the inside in developer replenishing chamber 37 relatively is provided with the supply transfer unit 27 as the developer replenishing parts with developer roll 22, and it supplies with developer to developer roll 22.

As shown in Figure 4, stirring transfer unit 26 and supplying with on the transfer unit 27, turning

axle

26a, 27a are set respectively and are arranged on turning axle 26a, the helical blade 26b of 27a periphery, 27b.Because two circulation transfer units (stir transfer unit 26, supply with transfer unit 27) constitute along the agent of opposite directions supplying developing; So developer in developer in the developer teeter chamber 36 and the developer replenishing chamber 37; Shown in arrow A, B, carry in the opposite direction respectively.In addition; As previously mentioned, because utilize the through

hole

33,34 that is arranged on

developer teeter chamber

36 and 37 ends, developer replenishing chamber, can carry out moving of developer; So be delivered to the developer of end, be recycled conveying in above-mentioned two indoor (developer teeter chamber 36, developer replenishing chambers 37).

In addition, as shown in Figure 4, form developer replenishing mouth 31 at the upper surface of the upstream-side-end of the developer throughput direction A of developer teeter chamber 36, from the developer of not shown developer collecting receiving part, supply in the developer teeter chamber 36 of developing apparatus 20.In addition, developer outlet opening 32 is set, the part of the developer of deterioration is discharged outside developing apparatus in predetermined timing in the downstream of the developer throughput direction A of developer teeter chamber 36.

In addition, as shown in Figure 3, roughly columned magnetic part 22a that developer roll 22 supports by being fixed and the rotary cylindric sleeve 22b that is provided with around magnetic part 22a constitute.Because on magnetic part 22a, at Zhou Fangxiang a plurality of magnetic pole N1～N3, S1, S2 are set, so around developer roll 22, produce the magnetic field that utilizes this magnetic pole N1～N3, S1, S2 to attract or repel developer.Wherein, utilize the magnetic field that produces from magnetic pole N2 to S2, attract the supplying developing agent to developer roll 22.On the other hand, repel magnetic field,, prevent developer moving simultaneously from developer teeter chamber 36 so supply with and, leave from developer roll 22 in this position by the developer that developer roll 22 keeps to photoreceptor 140 sides because between the N2 of homopolarity and N3, can produce.

In addition, in this embodiment, the surface of sealed roller 23 is that the material of non-magnetic stainless steel (SUS) forms, along the direction of principal axis configuration of photoreceptor 140.In this embodiment, developer roll 22 is driven by not shown same drive source with sealed roller 23, and the startup of action/stop regularly and the voltage that applies are also identical.In addition, the sense of rotation of sealed roller 23 is set in the other direction at the relative portion place with photoreceptor 140.According to this structure, sealed roller 23 attracts and is recovered in the toner flying dust of the downstream generation of developer roll 22.

In addition, an end of scraper plate 24 is by the lateral support of developer container 21.This scraper plate 24 extends to oblique upper from a supported end, and the other end is a free end, whole axially on sealed roller 23 relatively and butt.Be applied to the voltage on the scraper plate 24 and apply regularly identical with sealed roller 23.Scraper plate 24 sweeps the toner by sealed roller 23 absorption, makes floating toner return the stirring transfer unit 26 in the developer teeter chamber 36.Thus, in this embodiment, make its recoverer that returns developer teeter chamber 36, enumerated the device that constitutes by sealed roller 23 and scraper plate 24 as reclaiming floating toner.

In the developing apparatus 20 of the embodiment with said structure 1, from the developer of developer replenishing mouth 31, mix by stirring transfer unit 26 to 36 supplies of developer teeter chamber, carry to an end of developer teeter chamber 36.Developer to carry an end utilizes through hole to move to developer replenishing chamber 37, and utilizes supply transfer unit 27 to carry to the other end.Thus, the developer that circulation is carried, is supplied with to developer roll 22 from supplying with transfer unit 27 with the carried charge frictional electrification of specified polarity through mixing.

And the developer of supplying with to developer roll 22 in the relative developing regional of developer roll 22 and photoreceptor 140, is supplied with to photoreceptor 140 from developing apparatus 20, in the lip-deep electrostatic latent image image portion attached to photoreceptor 140.

At this moment, between developer roll 22 and photoreceptor 140, can produce not floating floating toner, but this floating toner can be in the downstream of the sense of rotation of photoreceptor 140, by sealed roller 23 recovery attached to photoreceptor 140 surfaces.The floating toner that reclaims is followed the rotation of sealed roller 23, utilizes scraper plate 24 that it is swept.Sweep the floating toner that falls, utilize the gravity free-falling, or, be back to the stirring transfer unit 26 that is positioned at sealed roller 23 belows via developer container 21.As stated, be back to the floating toner that stirs transfer unit 26, in developer teeter chamber 36; Developer with being supplied with by developer replenishing mouth 31 is stirred mixing; With on behind the electric weight of regulation, via supplying with transfer unit 27, supply with to developer roll 22 once more.

Embodiment 2

Below, for the developing apparatus that has used embodiment 2 of the present invention 20, use Fig. 5,6 to describe.

Fig. 5 is the longitudinal profile key diagram suitable with Fig. 3 of embodiment 1, and Fig. 6 is the axial section key diagram suitable with Fig. 4 of embodiment 1.And the identical label of parts and structure mark for have identical function in the embodiment 2 with aforementioned embodiments 1 omits detailed explanation.

As shown in Figure 5, as developing apparatus 20,, have and utilize developer teeter chamber 56 that is positioned at downside that dividing plate 48 separates up and down and the developer replenishing chamber 57 that is positioned at upside at developer container 21 set inside dividing plates 48.One end of dividing plate 48 is fixed on the side of developer container 21, and simultaneously, the other end extends to developer roll 22 directions.In addition, dividing plate 48 is provided with through

hole

53,54 at its both ends, with embodiment 1 likewise, can carry out moving of developer.

Near the photoreceptor 140 of developer teeter chamber 56, be provided with: sealed roller 23, it is used to reclaim floating toner; And floating toner scrapes the scraper plate 24 of taking, and itself and sealing roller 23 butts below the vertical direction with respect to sealing roller 23, are provided with and stir transfer unit 26 and carry accessory 41.In addition, in developer replenishing chamber 57, supply transfer unit 27 relatively is set with developer roll 22.

, carry accessory 41 to be arranged on here, that is, in the horizontal direction, be arranged between sealed roller 23 and the stirring transfer unit 26, and on vertical direction, be arranged on and stir between transfer unit 26 and the supply transfer unit 27 with upper/lower positions.Because should carry accessory 41 with respect to stirring transfer unit 26; Its rotational speed is fast; So the transport capacity of developer is high; Follow developer via after the through hole 54 stated from developer teeter chamber 56 to the moving of developer replenishing chamber 57, with near the developer that is trapped in the through hole 54, carry to the direction identical with the arrow D of Fig. 6.In addition, this conveying accessory 41 makes by sealed roller 23 and reclaims and sweep the floating toner that falls by scraper plate 24 and return stirring transfer unit 26.In this embodiment; Carry accessory 41 and for example stir transfer unit 26 and supply with transfer unit 27 likewise, constitute the spiral-shaped of helical blade is set on turning axle, but be not limited thereto; So long as structure that can the supplying developing agent gets final product, can suitably select.Thus, in this embodiment, as reclaiming floating toner and make its recoverer that returns developer teeter chamber 56, illustration by sealed roller 23, scraper plate 24 and the structure of carrying accessory 41 to constitute.

In Fig. 6, helical blade 27c is set in the end of downstream side of the developer throughput direction D that supplies with transfer unit 27.This helical blade 27c, its pitch is shorter than and is arranged on other helical blade 27b that supplies with on the transfer unit 27, and is reciprocal spiral-shaped.In addition, in developer container 21, in the end of downstream side position of the developer throughput direction that stirs transfer unit 26; And upper surface for the upstream-side-end position of the developer throughput direction of supplying with transfer unit 27; Developer replenishing mouth 51 is set, is supplying with on the developer throughput direction of transfer unit 27, in downstream with respect to the position relative with developer roll 22; And the side in developer replenishing chamber 57 is provided with developer outlet opening 52.

In the developing apparatus 20 of the embodiment with said structure 2,,, in developer teeter chamber 56, supply with via developer replenishing chamber 57 and through hole 53 from the developer of developer replenishing mouth 51 supplies.The developer of developer teeter chamber 56 utilizes stirring transfer unit 26 to mix, and carries to an end of developer teeter chamber 56.The developer of carrying to an end; Its part utilization carries accessory 41 to carry to the direction of arrow D; To prevent that near the developers the through hole 54 from piling up, simultaneously, residual developer is supplied with to the developer replenishing chamber 57 on its top from developer teeter chamber 56 via through hole 54.The developer of supplying with to developer replenishing chamber 57 is supplied with to developer roll 22 from supplying with transfer unit 27, and developer is supplied with to photoreceptor 140.

At this moment, floating floating toner between developer roll 22 and photoreceptor 140, with embodiment 1 likewise; Reclaimed by sealed roller 23, simultaneously, the floating toner of recovery is swept by scraper plate 24; Then, via carrying accessory 41, return the stirring transfer unit 26 in the developer teeter chamber 56.Thus, return the floating toner that stirs transfer unit 26, in developer teeter chamber 56, mix with the developer of supplying with from developer replenishing mouth 51, with on after the electric weight of regulation, supply with to developer roll 22 once more.

Embodiment 3

Below, for the developing apparatus that has used embodiment 3 of the present invention to relate to, use Fig. 7,8 to describe.

Fig. 7 is the longitudinal profile key diagram suitable with Fig. 3 of embodiment 1, and Fig. 8 is the axial section key diagram suitable with Fig. 4 of embodiment 1.In addition, parts and structure for have identical functions in the embodiment 3 with aforesaid embodiment 1 and embodiment 2 mark identical label, and its detailed explanation is omitted.

As shown in Figure 7, developing apparatus 20 has in developer container 21 inside: developer teeter chamber 76; The developer replenishing chamber 77 adjacent with developer teeter chamber 76; And the recovery chamber 78 adjacent with developer replenishing chamber 77.As shown in Figure 8, developer teeter chamber 76 is separated by first dividing plate 61 with developer replenishing chamber 77, and in addition, developer replenishing chamber 77 is separated by second partition 62 with recovery chamber 78.On this first dividing plate 61, with the dividing plate 28 of embodiment 1 likewise, through

hole

73,74 is set, but on second partition 62 at both ends, only the through hole 75 that moves that carries out developer is set in an end of the downstream direction of arrow A.

As shown in Figure 7, reclaim chamber 78 in set inside: sealed roller 23; Scraper plate 24 with sealing roller 23 butts; Partition wall 25; And reclaiming transfer unit 68, it is arranged on the below with respect to the abutting part of sealed roller 23 and scraper plate 24, can rotate.Because the diameter that should reclaim transfer unit 68 is less than stirring transfer unit 26, supplying with transfer unit 27; And rotational speed is fast; So it has higher transport capacity, the developer that reclaims in the chamber 78 is carried to the arrow A direction, so that it returns developer teeter chamber 76 (with reference to Fig. 8).Thus; In this embodiment; As reclaiming floating toner and with its recoverer of supplying with to developer teeter chamber 76, illustration is by as the sealed roller 23 that reclaims the unit, scraper plate 24, as the recovery transfer unit 68 of supply unit with reclaim the structure that chamber 78 constitutes.

In addition, developer container 21 is provided with developer replenishing mouth 71 at the upper surface of the upstream-side-end of the developer throughput direction B of developer teeter chamber 76, in the downstream of the developer throughput direction A that reclaims chamber 78 developer outlet opening 72 is set.

In the developing apparatus 20 of the embodiment with said structure 3; Floating toner floating between developer roll 22 and photoreceptor 140 is reclaimed by sealed roller 23; The floating toner that reclaims; Utilizing scraper plate 24 to sweep backwardness, utilizing the recovery transfer unit 68 of the below that is positioned at sealed roller 23 and scraper plate 24, carrying to the arrow A direction.Be delivered to the floating toner of the end of downstream side of arrow A direction,, return the stirring transfer unit 26 in the developer teeter chamber 76 via through hole 75 and through hole 73.As stated, return the floating toner that stirs transfer unit 26, in developer teeter chamber 76, mix with the developer of supplying with by developer replenishing mouth 71, with on behind the electric weight of regulation, supply with to developer roll 22 once more.

The ◎ mode of texturing

Below, use Fig. 9, the mode of texturing of the developing apparatus 20 of embodiment 3 is described.

This mode of texturing because except the configuration of through hole 73 and supply with the structure of transfer unit 27, is the structure identical with embodiment 3, so only variation point is described.

Fig. 9 is the synoptic diagram of wanting portion that shows the axial section of the developing apparatus 20 of representing that mode of texturing relates to.

Through hole 73 is arranged on the developer conveyance direction downstream side in the developer replenishing chamber 77 with respect to through hole 75.In addition, the upstream side with respect to through hole 73 in supplying with transfer unit 27 is provided with the helical blade 27d to through hole 73 direction supplying developing agent.

In the developing apparatus 20 of mode of texturing with said structure, fall to the floating toner that reclaims in the chamber 78, after utilization recovery transfer unit 68 is delivered to the end,, move in the developer replenishing chamber 77 via through hole 75.In developer replenishing chamber 77, utilize supply transfer unit 27 to be delivered to through hole 73, move to developer teeter chamber 76 from this through hole 73.Thus, the floating toner that can prevent to reclaim is carried the generation adverse current with respect to the circulation of developer in developer teeter chamber 77.

In addition, the content of more than explaining, i.e. explanation in this embodiment enumerated being applicable to embodiment of the present invention, but the present invention is not limited to above content.For example, in this embodiment, use not magnetic sealed roller 23, also can make recoverer have magnetic, thereby can reclaim carrier with toner as recoverer.In addition, in this embodiment, it constitutes, and the sense of rotation of recoverer is the sense of rotation opposite with photoreceptor 140, but also can be identical sense of rotation.In addition, the timing of voltage application or action also can be adopted the appropriate timing corresponding to the situation of device respectively for developer roll, scraper plate, sealed roller.

Claims

1. developing apparatus is characterized in that having:

Developer keeps body, and it keeps developer, the toner that this developer comprises carrier and keeps body to supply with to picture;

The developer replenishing chamber, it accommodates the developer that keeps body to supply with to aforementioned developer;

Supply with transfer unit, it has turning axle, and will be housed in the indoor developer of aforementioned developer replenishing along this turning axle conveying;

The developer teeter chamber, it is arranged on the downside of aforementioned developer replenishing chamber on vertical direction, and is housed in round-robin developer between this developer teeter chamber and the aforementioned developer replenishing chamber;

Dividing plate, it is separated aforementioned developer replenishing chamber and aforementioned developer teeter chamber, simultaneously, between aforementioned developer replenishing chamber and aforementioned developer teeter chamber, utilizes through hole to make developer movement;

Stir transfer unit, it has turning axle, and the developer that will be housed in the aforementioned developer teeter chamber is carried along the opposite direction of the developer throughput direction of this axial rotary and aforementioned supply transfer unit;

Reclaim roller, it rotatably is arranged on the sense of rotation downstream that picture keeps body with respect to the relative portion that aforementioned developer keeps body and said image to keep body, and reclaims toner, makes it return aforementioned developer teeter chamber;

Scrape and get parts, itself and the aforementioned recovery roller butt that rotates, and scrape and get the toner that reclaims by aforementioned recovery roller; And

Transfer unit; It in the horizontal direction; Be arranged between aforementioned recovery roller and the aforementioned stirring transfer unit; And on vertical direction, be arranged between aforementioned stirring transfer unit and the aforementioned supply transfer unit, and will get parts and scrape the toner got and carry to the direction opposite by aforementioned scraping with the throughput direction of aforementioned stirring transfer unit by the toner that aforementioned stirring transfer unit is carried.

2. developing apparatus as claimed in claim 1 is characterized in that,

This developing apparatus has in inside: the developer replenishing chamber, and it is provided with aforementioned supply transfer unit; And the developer teeter chamber, it is provided with aforementioned stirring transfer unit, aforementioned recovery roller, aforementioned scraping and gets parts and aforementioned transfer unit.

3. developing apparatus as claimed in claim 1 is characterized in that,

Aforementioned recovery roller, aforementioned scraping are got parts and aforementioned transfer unit and are arranged on the top with respect to aforementioned stirring transfer unit, and the toner that makes recovery falls and returns aforementioned stirring transfer unit.

4. image processing system is characterized in that having:

Rotatable picture keeps body, and it forms electrostatic latent image; And

The described developing apparatus of claim 1, but it makes the electrostatic latent image that keeps forming on the body at this picture become video.

5. image processing system as claimed in claim 4 is characterized in that,

This image processing system has in inside: the developer replenishing chamber, and it is provided with aforementioned supply transfer unit; And the developer teeter chamber, it is provided with and stirs transfer unit, aforementioned recovery roller, aforementioned scraping and get parts and aforementioned transfer unit.

6. image processing system as claimed in claim 4 is characterized in that,