CN101221393A - Developing device and image forming apparatus using the same - Google Patents
Developing device and image forming apparatus using the same Download PDFInfo
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- CN101221393A CN101221393A CNA2007101865174A CN200710186517A CN101221393A CN 101221393 A CN101221393 A CN 101221393A CN A2007101865174 A CNA2007101865174 A CN A2007101865174A CN 200710186517 A CN200710186517 A CN 200710186517A CN 101221393 A CN101221393 A CN 101221393A
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Abstract
The invention provides a developing device capable of preventing excess charge of the toner so as to prevent occurrence of failure caused by a decrease in toner flying property between a developing roller and a photoconductor or a change in development characteristics. The developing device of the invention has: a front end side cut portion formed on the front end side of the developing roller in the rotational direction thereof and having a leading end side cut angle theta 1, and a back end side cut portion formed on the back end side of the developing roller in the rotational direction thereof and having a back end side cut angle theta 2. According to that relationship theta 1 < theta 2 is satisfied in a plurality of groove portions of the developing device, a non-magnetic mono component toner can be developed.
Description
Technical field
The present invention relates to developing apparatus and adopted the image processing system of this developing apparatus, it adopts non-magnetic monocomponent toner, and the jumping phenomenon by toner develops.
Background technology
The spy of Japan opens in the image processing system of the described employing non-magnetic monocomponent toner of 2001-66876 communique, and toner is gone up at developer roll (sleeve) and is endowed electric charge by frictional electrification.In order to produce frictional electrification effectively, that is,, developer roll is implemented shot blast for toner forms good Frotteurism on developer roll, give the roughness Rz of its certain regulation of surface thus.
But surfaceness Rz can be cut down in the use of developer roll, compares with the state of the Frotteurism of toner and new developer roll not to be good, determined the life-span of developer roll thus.The reason that developing roller surface is subdued is, the hardness of silicon dioxide that adds processing in toner is very high.In order to prolong its life-span, in this invention, make it be difficult for being cut down by implementing electroplating processes, but still be not enough aspect the life-span.
So, in order to prolong the life-span of developing apparatus, open the 2000-56558 communique as the spy of Japan, propose a kind of on developer roll the method for the groove of formation rule.The developer roll that is formed with this groove is confirmed, compares with this developer roll of having implemented irregular surface state of shot blast, and its endurance quality is superior, and the life-span of developing apparatus prolongs.It is in order to prevent that toner from collecting in the axially one-sided of box along groove action and toner that prior art described in patent documentation 2, two directions are provided with groove.
Yet, in developer roll, find following new problem with groove shape that the spy opens the described rule of 2000-56558 communique, that is, cause obstruction at slot part to the toner of developer roll surface transport, the toner that can not enter in the groove is resetted.Here, the so-called readjustment is meant and will do not develop and the toner (old toner) that returns is wiped off with donor rollers through photoreceptor in the toner on the developer roll.After donor rollers is carried out this readjustment, with new toner supply to developer roll.If this readjustment is not carried out well, then same toner is continuously the state that remains on the developer roll.And there are the following problems, because remaining like this toner is repeatedly by the margining tablet friction, thereby causes the charged too high of toner, and be created in the unfavorable condition that circling in the air property reduction between developer roll and the photoreceptor and developing property variation etc. cause.
In addition, the spy opens the roller of the surface configuration of the rule of putting down in writing in the 2000-56558 communique, compares with irregular surface configuration, also has the problem of the charging property difference of toner.Its reason is speculated as, with regard to irregular surface configuration, because toner (randomly) action brokenly on the developer roll surface is carried out well mutual friction mutually and rolling with developer roll thus.Fig. 8 is the figure that expression has the image of the toner action on the roller of irregular surface configuration.Fig. 9 is the figure that expression has the image of the toner action on the roller of surface configuration of rule.
Though make whole toners equably frictional electrification be desirable, the roller of surface configuration of rule is compared with the roller of irregular surface configuration, makes the charged ability of toner, fecund is given birth to charged bad toner.If this charged bad toner (this situation is meant not electronegative and the toner of positively charged) exists, then exist overexposure to become the problem that toner many and that consume lavishly increases.
Summary of the invention
The present invention develops for addressing the above problem, developing apparatus of the present invention, it is characterized in that, have from the sense of rotation of developer roll and see the front switch-in part of the front incision angle θ 1 that forms in front and see the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, the developer roll of the slot part of setting up by the relation that is formed with a plurality of θ 1＜θ 2 develops non-magnetic monocomponent toner.
In addition, developing apparatus of the present invention is characterized in that, by the donor rollers of carrying out retrograde rotation in the sense of rotation of the relative developer roll of clamping part, supplies with toner to developer roll.
In addition, developing apparatus of the present invention, it is characterized in that, have from the sense of rotation of developer roll and see the front switch-in part of the front incision angle θ 1 that forms in front and see the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, by developer roll and donor rollers non-magnetic monocomponent toner is developed, described developer roll is formed with the slot part of the relation establishment of a plurality of θ 1＞θ 2, described donor rollers is rotated (ウ イ ズ returns translocation) in the same way in the sense of rotation of relative this developer roll of clamping part, supplies with toner to this developer roll simultaneously.
In addition, image processing system of the present invention, it is characterized in that, adopt developing apparatus, described developing apparatus has from the sense of rotation of developer roll to be seen the front switch-in part of the front incision angle θ 1 that forms in front and sees the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, the developer roll of the slot part of setting up by the relation that is formed with a plurality of θ 1＜θ 2 develops non-magnetic monocomponent toner.
Image processing system of the present invention, it is characterized in that, adopt developing apparatus, described developing apparatus has from the sense of rotation of developer roll to be seen the front switch-in part of the front incision angle θ 1 that forms in front and sees the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, by developer roll and donor rollers non-magnetic monocomponent toner is developed, described developer roll is formed with the slot part of the relation establishment of a plurality of θ 1＞θ 2, described donor rollers is rotated in the same way in the sense of rotation of relative this developer roll of clamping part, supplies with toner to this developer roll simultaneously.
According to the present invention, can realize developing apparatus and adopt the image processing system of this developing apparatus, it can prevent to make the charged too high of toner owing to the readjustment performance reduces, and can prevent the generation of the unfavorable condition that the circling in the air property decline between developer roll and photoreceptor and the variation of developing property etc. cause.
In addition,, can realize developing apparatus and adopt the image processing system of this developing apparatus that it can prevent to increase owing to toner charged bad causes overexposure to become toner many and that consume lavishly according to the present invention.
Description of drawings
Fig. 1 is the figure in cross section of the developing apparatus 100 of expression embodiment of the present invention;
Fig. 2 is expression with the tandem type of the developing apparatus that adopted embodiment of the present invention is the integrally-built sectional view of the image processing system of example;
Fig. 3 is near the figure that extracts expression the developer roll 107 with the developing apparatus 100 of embodiment of the present invention;
Fig. 4 is the figure that schematically shows in the developing apparatus 100 of embodiment of the present invention the groove that the surface of the developer roll 107 that adopts forms;
Fig. 5 is that amplify and the figure that schematically shows in the cross section on developer roll 107 surfaces of will be in the developing apparatus 100 of embodiment of the present invention adopting;
Fig. 6 is the figure that schematically shows contact site (the B part of Fig. 3) cross section of the developer roll 107 that adopts in the developing apparatus 100 of embodiment of the present invention and margining tablet 109;
Fig. 7 is the figure that schematically shows contact site (the C part of Fig. 3) cross section of the developer roll 107 that adopts in the developing apparatus 100 of embodiment of the present invention and donor rollers 105;
Fig. 8 is the figure that expression has the image of the toner action on the roller of irregular surface configuration;
Fig. 9 is the figure that expression has the image of the toner action on the roller of surface configuration of rule;
Figure 10 is near the figure that extracts expression the developer roll 107 with the developing apparatus 100 of other embodiments of the present invention;
Figure 11 is that the sectional view on developer roll 107 surfaces of will be in the developing apparatus 100 of other embodiments of the present invention adopting amplifies and the figure that schematically shows;
Figure 12 is the figure in cross section that schematically shows the contact site (the C part of Figure 10) of the developer roll 107 that adopts in the developing apparatus 100 of other embodiments of the present invention and donor rollers 105.
Embodiment
Below, with reference to the description of drawings embodiments of the present invention.Fig. 1 is the figure in cross section of the developing apparatus 100 of expression embodiment of the present invention.Developing apparatus 100 of the present invention is to utilize non-magnetic monocomponent toner, the developing apparatus that develops by jumping phenomenon.
Developing apparatus 100 possesses the housing 103 that is formed with toner roughly cylindraceous resettlement section 101 in inside, and housing 103 is provided with donor rollers 105 and developer roll 107 relatively.Developing apparatus 100 is being placed image form under the state (with reference to Fig. 2) of position, devices spaced apart is (for example a little with respect to photoreceptor 23 for developer roll 107,100～300 μ m) and adjacent, have the limit to the opposite direction driven in rotation of sense of rotation (direction of arrow among the figure) of photoreceptor 23, the limit makes the function of the developable latent image that forms on the photoreceptor 23 with the toner on the side face that supplies to developer roll 107.This development effect is following to be carried out, on developer roll 107, be applied to the overlapping development bias voltage of alternating voltage on the DC voltage from developing bias supply (not shown), between developer roll and photoreceptor, act on vibration voltage, from developer roll 107 with toner supply to the electrostatic latent image part that forms at photoreceptor 23.
The surface of donor rollers 105 is formed by the urethanes sponge, and the side face of donor rollers 105 can be with the state of contact developer roll 107 along rotating with developer roll 107 equidirectional (among Fig. 1 for being rotated counterclockwise direction).also apply on the donor rollers 105 with developer roll 107 on the voltage that equates of the development bias voltage that applies.
Crimping margining tablet 109 on developer roll 107, it is kept evenly at the length direction of the side face of developer roll 107 all the time by plate spring component 111 and the effect that is located at the elastomeric element 112 of its downside, to wipe off attached to the unnecessary part in the toner on the side face of developer roll 107, on the side face of developer roll 107, support a certain amount of toner.In addition, margining tablet 109 also has and makes the suitable charged functions of toner 113.
The toner of being wiped off falls naturally, sneaks in the toner 113 in the toner resettlement section 101, for this point, is described in detail in the back.In addition, the other end that an end is fixed on the seal member 115 on the housing 103, thus, prevent that the toner 113 in the housing 101 from dispersing to the outside in the upside crimping of developer roll 107 side faces.
Being provided with turning axle 117 in toner resettlement section 101 is center right handed stirrer 119 in Fig. 1.It is two arm members 121 that extend mutually round about at the center that stirrer 119 possesses with turning axle 117, and each arm member 121 is set at than the short some sizes of the cross section diameter of a circle of toner resettlement section 101.The front end of stirring wing plate 123 from each arm member 121 extended to the reverse direction of the sense of rotation of stirrer 119.Stirring wing plate 123 constitutes by having flexible chip part, and its front is crimped on the inner peripheral surface of toner cylindraceous resettlement section 101 by the flexible elastic force that causes.By this structure, when stirrer 119 rotation, the toner 113 of existence in the inner peripheral surface of toner resettlement section 101 and the zone 125 between the stirring wing plate 123 can be swept and is transported on the toner guide member described later by stirring wing plate 123.
Top 114 of the toner 113 of accommodating in the toner resettlement section 101 is set at, and is connected to the lower position, position 127 on the side face of developer roll 107 than margining tablet 109.If it is set at the degree that the dosage of nearly mixing colours buries margining tablet 109, then being limited the toner that sheet 109 wipes off can be present near this margining tablet, consequently, can hinder the return path of getting back in the toner resettlement section 101, in addition, margining tablet 109 from developer roll 107 wipe unnecessary toner off and limit transport to the function of the toning dosage of developing regional and make the suitable charged function of toner also be subjected to obstruction.
Top 114 position of the toner 113 of accommodating in the toner resettlement section 101 more particularly, is that the position of the intersection point 128 of plate spring component 111 and elastomeric element 112 is set as the upper limit with the below of the lower end of margining tablet 109.If top 114 position of the toner 113 in the toner resettlement section 101 arrives on the above-mentioned intersection point 128, just may limit the action of plate spring component 111, thus, may not obtain suitable restriction pressure, consequently, may hinder " with the function of toner carrier on the side face of developer roll 107 of ormal weight " and reach " make toner suit charged function ".But, as mentioned above,, can above-mentioned each function not caused obstruction thus because the upper limit of top 114 position of toner 113 is set as the position of above-mentioned intersection point 128.
Be formed with between 114 above the toner 113 of in the position 127 of margining tablet 109 butt developer rolls 107 side faces and toner resettlement section 101, accommodating with the 114 toner guide surfaces 129 that tilt and as the part of housing 103 above toner of the angle of inclination more than the angle of repose of toner 113.Toner guide surface 129 has and will be limited the function that toner 113 that sheet 109 wipes off from the side face of developer roll 107 imports to toner resettlement section 101 sides.
The toner of being wiped off from the side face of developer roll 107 by margining tablet 109 113 not necessarily need also can make the toner of wiping off 113 directly fall in the toner resettlement section 101 by toner guide surface 129 to 101 guiding of toner resettlement section.Like this, below the position 127 of margining tablet 109 butt developer rolls 107 side faces, be formed with and be used for to be limited the toner guide space portion 131 of sheet 109 from the toner 113 guiding toner resettlement sections 101 that the side face of developer roll 107 is wiped off.
Above toner resettlement section 101, be provided with toner guide member 133.This toner guide member 133 possesses: scraper plate 135, and the end 134 that it is arranged on a side of leaving donor rollers 105 forms the acute angle that is used to wipe off the toner 113 that is transported by stirring wing plate 123; Smooth delivery section 137, more by donor rollers 105 sides, upper face side is with the angle tilt more than the angle of repose of toner 113 and form the plane than this scraper plate 135 for it; Bend 141, its downstream in this smooth delivery section 137 forms, and upper face side is bent to form concave curved surface; Abutting part 143, it is in the suitable line pressure contact of the downstream of this bend 141 to set on the side face of donor rollers 105.Comprise the surfaceness of the toner guide member 133 of above-mentioned smooth delivery section 137, above-mentioned bend 141 and above-mentioned abutting part 143, form less than the toner mean grain size.
In addition, because the existence of above-mentioned abutting part 143, thereby can prevent following situation: the toner 113 that the following side of donor rollers 105 is adhered to is because of gravity falls, and causes the amount of the toner that can supply with to developer roll to reduce, and image color is reduced.In addition, the portion that temporarily retains 139 of the toner that narrows down with being formed with the cross section wedge shape between the side face of bend 141 and donor rollers 105.At this, the cross section is that wedge shape means, entrance side is big relatively, along with narrowing down to the working direction of toner, and is too narrow to the degree that toner can not natural landing fully in the front of wedge portion.
In having the toner guide member 133 of this shape, after the toner of being carried by stirring wing plate 123 113 is wiped off by scraper plate 135, toner 113 falls with even velocity gravity at the anywhere that its whole Width reaches at its vergence direction along smooth delivery section 137, temporarily is stored in the interim storage part 139 of toner.In the interim storage part 139 of toner that wedge shape ground narrows down, along with toner 113 is advanced in narrow region, the crimp force of the side face of donor rollers 105 increases gradually relatively, therefore, the side face of donor rollers 105 is extruded toner 113, thereby supports toner 113 easily on this side face.And, when toner 113 is extruded to such an extent that surpass abutting part 143, fall in the toner guide space portion 131, directly or by 129 guiding of toner guide surface turn back in the toner resettlement section 101.
Below, the toner color image of the developing apparatus of the present invention of having packed into is formed device describe.Fig. 2 is expression with the tandem type of the developing apparatus that adopted embodiment of the present invention is the integrally-built sectional view of the image processing system of example, image processing system 1 possesses housing 3, the row's paper carrier 5 that forms on the top of housing 3, a body 7 that can be provided with in the housing front with opening and closing, in housing 3, be provided with exposure assembly 9, image formation assembly 11, Air Blast fan 13, transfer belt assembly 15 and paper feeding assembly 17, in door body 7, be provided with paper conveying assembly 19.
Image forms four images formation positions 21 that assembly 11 possesses four developing apparatuss can settling the toner of taking in different colours.Four images form each developing apparatus that position 21 is used for yellow, magenta, dark green and black, represent with symbol 21Y, 21M, 21C and 21K in the drawings.Form corona charging device 25, the developing apparatus of the present invention 100 that position 21Y, 21M, 21C and 21K are provided with photoreceptor 23, are provided with at each image around photoreceptor 23.
Exposure assembly 9 is located at the space that image forms the oblique below of assembly 11, is provided with Air Blast fan 13 at its oblique upper.Below exposure assembly 9, be provided with paper supply assembly 17.Exposure assembly 9 bottom vertical dispose the scanister of forming by polygonal mirror motor 45 and polygonal mirror 47 49.In light path B, be provided with single f-θ lens 51 and catoptron 53 in addition, above catoptron 53, on photoreceptor 23, be respectively the mode of turning back according to scanning light path of all kinds non-parallelly and be provided with a plurality of mirrors 55 that turn back.
In the exposure assembly 9, penetrate with the laser beam that forms based on common data clock frequency modulation (PFM) from polygonal mirror 47 corresponding to picture signal of all kinds, through f-θ lens 51, catoptron 53, mirror 55 turns back, the photoreceptor 23 that forms position 21Y, 21M, 21C and 21K to each image shines, and forms latent image.The polygonal mirror 47 that forms the exposure assembly 9 of assembly 11 from relative each image constitutes with roughly the same length to the light path of photoreceptor 23, therefore, sweep length at the light beam of each light path scanning is also much the same, and the formation aspect of picture signal does not need special formation yet.Therefore, though LASER Light Source is modulated corresponding to the image of different separately colors by different separately picture signals, but can form according to common data clock frequency modulation (PFM), the color fringe that produces by the relative mistake of sub scanning direction because use common reflecting surface can be prevented, thereby simple structure can be constituted and cheap coloured image forms device.
Air Blast fan 13 has the function as cooling device, with air to the guiding of the direction of arrow, the function that the heat of realize exposing oneself in the future optical assembly 9 and other heat generating part is discharged.Thus, the temperature that can suppress polygonal mirror motor 45 rises, thereby can prevent the life-span of image quality deterioration and prolongation polygonal mirror 45.
The developing apparatus 100 that uses among the present invention is the developing apparatuss with the type of toner circulation use, is located at each image and forms upward use of position 21Y, 21M, 21C and 21K.The formation of these developing apparatuss is identical basically.
Below, the groove shape that forms on the surface to the developer roll 107 of the developing apparatus 100 of embodiment of the present invention describes.Fig. 3 is near the figure that extracts expression the developer roll 107 with the developing apparatus 100 of embodiment of the present invention.
Used in the developing apparatus of non-magnetic monocomponent toner,, had to make toner 113 suitably charged in order to produce this jumping phenomenon.Therefore, the effect by plate spring component 111 flexibly is crimped on margining tablet 109 on the developer roll 107, thereby makes the toner 113 that adheres on the side face of developer roll 107 charged.
Fig. 4 is the figure that schematically shows the groove that forms on the surface of the developer roll 107 that adopts in the developing apparatus 100 of embodiment of the present invention.The surface of developer roll 107 shown in Figure 4 is surfaces of depicting the image of the easiest grasp groove as, and is different with spacing between the groove of reality.The groove on the surface of such developer roll 107 can use formation such as patent documentation 2 described manufacture methods.
Fig. 5 is the figure that the sectional view amplification on 107 surfaces of the developer roll among Fig. 3 A is schematically shown.As shown in Figure 5, on the surface of developer roll 107, form the different groove of incision angle of a plurality of grooves with suitable spacing.Among Fig. 5, the surface element of 1070 expression developer rolls 107, the slot part of 1071 expression developer rolls 107,1074 expression bottom land faces.In addition, the sense of rotation of developer roll 107 is shown in the arrow among Fig. 5, and the sense of rotation of this developer roll 107 has defined " front end " shown below, " rear end " relatively.That is, in Fig. 5, the front switch-in part of 1072 expression slot parts 1071, in addition, 1073 expression rear end side switch-in parts.
The front incision angle θ 1 of the front switch-in part 1072 of slot part 1071 defines as shown in the figure like that by the surface element 1070 of developer roll 107 with through the line shown in the a-a ' of front switch-in part 1072.In addition, the rear end side of the rear end side switch-in part 1073 of slot part 1071 incision angle θ 2 defines as shown in the figure like that by the surface element 1070 of developer roll 107 with through the line shown in the b-b ' of rear end side switch-in part 1073.
In the developer roll 107 that adopts in the developing apparatus 100 of present embodiment, the mode so that (front incision angle θ 1)＜(rear end side incision angle θ 2) sets up forms slot part 1071.Also have, in the present invention, bottom land face 1074 must not have, and can not have this formation yet.In a word, as long as the groove that the relation of (front incision angle θ 1) before forming＜(rear end side incision angle θ 2) is set up.
Below, describe on the surface of developer roll 107, forming the effect that obtains with the groove of co-relation.
Fig. 6 is the figure that schematically shows contact site (the B part of Fig. 3) cross section of the developer roll 107 that adopts in the developing apparatus 100 of embodiment of the present invention and margining tablet 109.Among the figure, T is the toner particle that schematically shows.With Fig. 6 the mechanism of the charging property raising of the toner particle T in the developing apparatus 100 of embodiment of the present invention is described.
At the contact site of developer roll 107 and margining tablet 109,, make the toner particle T frictional electrification of carrying simultaneously by the slot part 1071 of developer roll 107 with the amount of margining tablet 109 restriction toner particle T.In the developer roll 107 in the present embodiment, by the front switch-in part 1072 and the rear end side switch-in part 1073 of the relation establishment of (front is cut angle θ 1)＜(rear end side is cut angle θ 2) are set at slot part 1070, thereby toner particle T enters in the slot part 1071 of developer roll 107 easily, and is not easy out (with reference to D and the E of Fig. 6).
Shown in the E of Fig. 6, the toner particle T that comes out from slot part 1071 produces strong resistance at rear end side switch-in part 1073 relatively, and the result is that by margining tablet 109 powerful friction toner particle T, the charging property of toner particle T is good thus.
Fig. 7 is the figure that schematically shows contact site (the C part of Fig. 3) cross section of the developer roll 107 that adopts in the developing apparatus 100 of embodiment of the present invention and donor rollers 105.Among the figure, T is the toner particle that schematically shows.The mechanism of arrangement raising of toner particle T of the developing apparatus 100 of embodiment of the present invention is described with Fig. 7.
In the developer roll 107 of present embodiment, be provided with the front switch-in part 1072 and the rear end side switch-in part 1073 of the relation establishment of (front incision angle θ 1)＜(rear end side is cut angle θ 2) at slot part 1071.In the present embodiment, the supply mode of the relation of the angle by this front and rear end side, the toner particle T in the donor rollers 105 is realized the raising of the resettability of toner particle T.
In the present embodiment, toner particle T depends on the retrograde rotation of donor rollers 105 to the supply mode of developer roll 107.That is, form following mode: at the clamping part of developer roll 107 and donor rollers 105, make developer roll 107 and donor rollers 105 retrograde rotations, toner particle T is supplied to developer roll 107.
The slot part 1071 of developer roll 107 is following shape, that is, and and shown in Fig. 7 F, by front switch-in part 1072 and rear end side switch-in part 1073 easy shapes from new toner particle T to slot part 1071 that supply with θ 1＜θ 2 relations.Shown in the F of Fig. 7,, then shown in the G of Fig. 7, can expect the effect that old toner particle T is extruded from slot part 1071 if new toner particle enters slot part 1071.Here, so-called old toner particle T is meant the particle that returns through not being developed behind the photoreceptor 23 in the toner particle on the developer roll 107.
More than, according to present embodiment, can be achieved as follows developing apparatus and adopt the image processing system of this developing apparatus, it can prevent owing to readjustment performance the charged too high of the toner cause that descend, and can prevent the generation of the unfavorable condition that circling in the air property decline between developer roll and photoreceptor and developing property variation etc. cause.
In addition, according to present embodiment, can be achieved as follows developing apparatus and adopt the image processing system of this developing apparatus, it can prevent to increase owing to toner charged bad causes overexposure to become toner many and that consume lavishly.
(embodiment 1)
As the developer roll 107 of the developing apparatus 100 of present embodiment, made the structure of 1=30 ° of front incision angle θ, 2=60 ° of rear end side incision angle θ.In addition, the developer roll of developing apparatus 100 as a comparative example, the structure of having made 1=45 ° of front incision angle θ, 2=45 ° of rear end side incision angle θ.Developer roll whichsoever, the interval between groove all is 80 μ m.
Adopt above developer roll, the developing apparatus 100 of present embodiment and the developing apparatus 100 of comparative example are installed on the image processing system shown in Figure 21, carried out the printing test under the following conditions.
(actuating speed condition)
Photoreceptor: 200mm/sec
Developer roll: 300mm/sec (photoreceptor rotates in the same way at clamping part relatively)
Donor rollers: 225mm/sec (developer roll is in the clamping part retrograde rotation relatively)
(condition such as development bias voltage)
Vdc (flip-flop) :-300V
Vpp (interchange, peak-to-peak voltage): 1400V
Frequency: 3KHz
Duty (ratio of positive lateral element): 60%
Waveform: square wave
Develop at interval: 140 μ m
According to above condition,
In the developing apparatus 100 of present embodiment, obtain following printing test findings, that is,
Full version concentration: OD value 1.5 does not have the style of calligraphy characterized by hollow strokes
Overexposure amount (per 1000 weight): 3g
In addition,
In the developing apparatus 100 of comparative example, obtain following printing test findings, that is,
Full version concentration: OD value 1.1 produces the style of calligraphy characterized by hollow strokes
Overexposure amount (per 1000 weight): 3g.
Above result is studied.In the developing apparatus of present embodiment, full version concentration can fully obtain.This can be speculated as, because the stirring of new toner and old toner is good, resettability is good, so the charged of toner can be not too high, and circling in the air property is good.On the other hand, in the developing apparatus of comparative example,, thereby think and in full version lettering, producing the style of calligraphy characterized by hollow strokes, the concentration that becomes deficiency because the supply of toner is abundant inadequately.
In addition, by 1000 white full versions are carried out lettering, with the developer gravimetry overexposure amount before and after the lettering.If charged bad toner (opposite polarity, this situation positively charged) increases, then overexposure increases, and toner consumes with being wasted.In the developing apparatus of present embodiment, the toner consumption of per 1000 wastes is low to moderate 3g.This is that charged bad toner is few because the charged of toner carries out well.Otherwise in the developing apparatus of comparative example, the toner consumption of waste reaches 15g.
Secondly, other embodiments of the present invention are described.Compare with previous embodiment in the present embodiment, different on the groove shape that forms on the surface of the sense of rotation of donor rollers 105 and developer roll 107, other part is identical, therefore, same part is quoted the narration of previous embodiment.
At first, the groove shape that forms on the surface to the developer roll 107 of the developing apparatus 100 of other embodiments of the present invention describes.Figure 10 extracts the figure of expression with near the parts developer roll in the developing apparatus 100 of other embodiments of the present invention 107.
So-called developer roll 107 and photoreceptor 23 constitute, the gap is set a little by roller, as shown shown in the arrow, driven in rotation round about each other, developing regional in developer roll 107 and photoreceptor 23 subtends, side face separately moves along equidirectional upward from the below, on developer roll 107, be applied to the overlapping development bias voltage of alternating voltage on the DC voltage from developing bias supply, between developer roll 107 and photoreceptor 23, act on vibration voltage, and partly supply with toner 113 from developer roll 107 to the electrostatic latent image that is formed on the photoreceptor, (jumping phenomenon) develops.
Used in the developing apparatus of non-magnetic monocomponent toner,, had to make toner 113 suitably charged in order to produce this jumping phenomenon.Therefore, the effect by plate spring component 111 flexibly is crimped on margining tablet 109 on the developer roll 107, thereby makes the toner 113 that adheres on the side face of developer roll 107 charged.
Figure 11 is the figure that the sectional view amplification on 107 surfaces of the developer roll among Figure 10 A is schematically shown.As shown in figure 11, on the surface of developer roll 107, form the different groove of a plurality of incision angles with suitable slot pitch.Among Figure 11, the surface element of 1070 expression developer rolls 107, the slot part of 1071 expression developer rolls 107,1074 expression bottom land faces.In addition, the sense of rotation of developer roll 107 is shown in the arrow among Figure 11, and the sense of rotation of this developer roll 107 has defined " front end " shown below, " rear end " relatively.That is, in Figure 11, the front switch-in part of 1072 expression slot parts 1071, in addition, 1073 expression rear end side switch-in parts.
The front incision angle θ 1 of the front switch-in part 1072 of slot part 1071 defines as shown in the figure like that by the surface element 1070 of developer roll 107 with through the line shown in the a-a ' of front switch-in part 1072.In addition, the rear end side of the rear end side switch-in part 1073 of slot part 1071 incision angle θ 2 defines as shown in the figure like that by the surface element 1070 of developer roll 107 with through the line shown in the b-b ' of rear end side switch-in part 1073.
In the developer roll 107 that adopts in the developing apparatus 100 of present embodiment, the mode so that (front incision angle θ 1)＞(rear end side incision angle θ 2) sets up forms slot part 1071.Also have, in the present invention, bottom land face 1074 must not have, and can not have this formation yet.In a word, as long as the groove that the relation of (front incision angle θ 1) before forming＞(rear end side incision angle θ 2) is set up.
Below, describe on the surface of developer roll 107, forming the effect that obtains with the groove of co-relation.Figure 12 is the figure that schematically shows contact site (the C part of Figure 10) cross section of the developer roll 107 that adopts in the developing apparatus 100 of other embodiment of the present invention and donor rollers 105.Among the figure, T is the toner particle that schematically shows.With Figure 12 the mechanism of the arrangement raising of the toner particle T in the developing apparatus 100 of embodiment of the present invention is described.
In the developer roll 107 of present embodiment, be provided with the front switch-in part 1072 and the rear end side switch-in part 1073 of the relation establishment of (front incision angle θ 1)＞(rear end side is cut angle θ 2) at slot part 1071.In the present embodiment, the supply mode of the relation of the angle by this front and rear end side, the toner particle T in the donor rollers 105 is realized the raising of the resettability of toner particle T.
In the present embodiment, toner particle T depends on the rotation in the same way of donor rollers 105 to the supply mode of developer roll 107.That is, form following mode: at the clamping part of developer roll 107 and donor rollers 105, developer roll 107 and donor rollers 105 are rotated in the same way, toner particle T is supplied to developer roll 107.And the rotation actuating speed of donor rollers 105 is set at the speed height than developer roll 107.
The slot part 1071 of developer roll 107 is following shape, that is, and and shown in Figure 12 F, by front switch-in part 1072 and rear end side switch-in part 1073 easy shapes from new toner particle T to slot part 1071 that supply with θ 1＞θ 2 relations.In addition, because the rotation actuating speed of donor rollers 105 is than the rotation actuating speed height of developer roll 107, so new toner particle T enters in the slot part 1071 easily.
Shown in F among Figure 12,, then shown in G among Figure 12, can expect the effect that old toner particle T is extruded from slot part 1071 if new toner particle T enters in the slot part 1071.At this, so-called old toner particle T is meant in the toner particle on the developer roll 107 particles that not have development through photoreceptor 23 backs and return.
More than, according to present embodiment, can be achieved as follows developing apparatus and adopt the image processing system of this developing apparatus, it can prevent owing to readjustment performance the charged too high of the toner cause that descend, and can prevent the generation of the unfavorable condition that circling in the air property decline between developer roll and photoreceptor and developing property variation etc. cause.
(embodiment 2)
As the developer roll 107 of the developing apparatus 100 of present embodiment, made the structure of 1=60 ° of front incision angle θ, 2=30 ° of rear end side incision angle θ.In addition, the developer roll of developing apparatus 100 as a comparative example, the structure of having made 1=45 ° of front incision angle θ, 2=45 ° of rear end side incision angle θ.Developer roll whichsoever, the interval between groove all is 80 μ m.
Adopt above developer roll, the developing apparatus 100 of present embodiment and the developing apparatus 100 of comparative example are installed on the image processing system shown in Figure 21, carried out the printing test under the following conditions.
(actuating speed condition)
Photoreceptor: 200mm/sec
Developer roll: 300mm/sec (photoreceptor rotates in the same way at clamping part relatively)
Donor rollers: 225mm/sec (developer roll rotates in the same way at clamping part relatively)
(condition such as development bias voltage)
Vdc (flip-flop) :-300V
Vpp (interchange, peak-to-peak voltage): 1400V
Frequency: 3KHz
Duty (ratio of positive lateral element): 60%
Waveform: square wave
Develop at interval: 140 μ m
According to above condition,
In the developing apparatus 100 of present embodiment, obtain following printing test findings, that is,
Full version concentration: OD value 1.5 does not have the style of calligraphy characterized by hollow strokes
In addition,
In the developing apparatus 100 of comparative example, obtain following printing test findings, that is,
Full version concentration: OD value 1.1 produces the style of calligraphy characterized by hollow strokes.
Above result is studied.In the developing apparatus of present embodiment, full version concentration can fully obtain.This can be speculated as, because the stirring of new toner and old toner is good, resettability is good, so the charged of toner can be not too high, and circling in the air property is good.On the other hand, in the developing apparatus of comparative example,, thereby think and in full version lettering, producing the style of calligraphy characterized by hollow strokes, the concentration that becomes deficiency because the supply of toner is abundant inadequately.
More than, according to the present invention, can be achieved as follows developing apparatus and adopt the image processing system of this developing apparatus, it can prevent owing to readjustment performance the charged too high of the toner cause that descend, and can prevent the generation of the unfavorable condition that circling in the air property decline between developer roll and photoreceptor and developing property variation etc. cause.
In addition, according to the present invention, can be achieved as follows developing apparatus and adopt the image processing system of this developing apparatus, it can prevent to increase owing to toner charged bad causes overexposure to become toner many and that consume lavishly.
Claims (5)
1. developing apparatus, it is characterized in that, have from the sense of rotation of developer roll and see the front switch-in part of the front incision angle θ 1 that forms in front and see the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, the developer roll of the slot part of setting up by the relation that is formed with a plurality of θ 1＜θ 2 develops non-magnetic monocomponent toner.
2. developing apparatus as claimed in claim 1 is characterized in that, by the donor rollers of carrying out retrograde rotation in the sense of rotation of the relative developer roll of clamping part, supplies with toner to developer roll.
3. developing apparatus, it is characterized in that, have from the sense of rotation of developer roll and see the front switch-in part of the front incision angle θ 1 that forms in front and see the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, by developer roll and donor rollers non-magnetic monocomponent toner is developed, described developer roll is formed with the slot part of the relation establishment of a plurality of θ 1＞θ 2, described donor rollers is rotated in the same way in the sense of rotation of relative this developer roll of clamping part, supplies with toner to this developer roll simultaneously.
4. image processing system, it is characterized in that, adopt developing apparatus, described developing apparatus has from the sense of rotation of developer roll to be seen the front switch-in part of the front incision angle θ 1 that forms in front and sees the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, the developer roll of the slot part of setting up by the relation that is formed with a plurality of θ 1＜θ 2 develops non-magnetic monocomponent toner.
5. image processing system, it is characterized in that, adopt developing apparatus, described developing apparatus has from the sense of rotation of developer roll to be seen the front switch-in part of the front incision angle θ 1 that forms in front and sees the rear end side switch-in part of the rear end side incision angle θ 2 that forms in rear end side from the sense of rotation of developer roll, by developer roll and donor rollers non-magnetic monocomponent toner is developed, described developer roll is formed with the slot part of the relation establishment of a plurality of θ 1＞θ 2, described donor rollers is rotated in the same way in the sense of rotation of relative this developer roll of clamping part, supplies with toner to this developer roll simultaneously.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006330237 | 2006-12-07 | ||
| JP2006-330236 | 2006-12-07 | ||
| JP2006330237A JP2008145563A (en) | 2006-12-07 | 2006-12-07 | Developing device and image forming apparatus using same |
| JP2006330236 | 2006-12-07 | ||
| JP2006-330237 | 2006-12-07 | ||
| JP2006330236A JP2008145562A (en) | 2006-12-07 | 2006-12-07 | Developing device and image forming apparatus using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101221393A true CN101221393A (en) | 2008-07-16 |
| CN101221393B CN101221393B (en) | 2011-08-31 |
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|---|---|---|---|
| CN2007101865174A Expired - Fee Related CN101221393B (en) | 2006-12-07 | 2007-12-04 | Developing device and image forming apparatus using the same |
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| Country | Link |
|---|---|
| JP (1) | JP2008145562A (en) |
| CN (1) | CN101221393B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566368A (en) * | 2010-12-17 | 2012-07-11 | 佳能株式会社 | Image forming apparatus |
| CN101807030B (en) * | 2009-02-18 | 2012-08-22 | 精工爱普生株式会社 | Developing device and image forming apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6134887B2 (en) * | 2012-12-28 | 2017-05-31 | エスプリンティンソリューション株式会社 | Developing device, process cartridge, and image forming apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08227219A (en) * | 1994-12-20 | 1996-09-03 | Ricoh Co Ltd | One-component developing device |
| JP2003057940A (en) * | 2001-08-09 | 2003-02-28 | Ricoh Co Ltd | Developing device, developing method, image forming device, and developer |
-
2006
- 2006-12-07 JP JP2006330236A patent/JP2008145562A/en not_active Withdrawn
-
2007
- 2007-12-04 CN CN2007101865174A patent/CN101221393B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807030B (en) * | 2009-02-18 | 2012-08-22 | 精工爱普生株式会社 | Developing device and image forming apparatus |
| CN102566368A (en) * | 2010-12-17 | 2012-07-11 | 佳能株式会社 | Image forming apparatus |
| US8750729B2 (en) | 2010-12-17 | 2014-06-10 | Canon Kabushiki Kaisha | Image forming apparatus |
| CN102566368B (en) * | 2010-12-17 | 2015-06-03 | 佳能株式会社 | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008145562A (en) | 2008-06-26 |
| CN101221393B (en) | 2011-08-31 |
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