CN100461019C - Conductive roller and image forming device using same - Google Patents
Conductive roller and image forming device using same Download PDFInfo
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- CN100461019C CN100461019C CNB2006100581734A CN200610058173A CN100461019C CN 100461019 C CN100461019 C CN 100461019C CN B2006100581734 A CNB2006100581734 A CN B2006100581734A CN 200610058173 A CN200610058173 A CN 200610058173A CN 100461019 C CN100461019 C CN 100461019C
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Abstract
The invention provides a conductive roller that can suppress equipment costs for production and an image forming apparatus using the conductive roller. In the conductive roller 1, one or more elastic layers 3 formed from a silicone rubber or urethan rubber containing a conductive agent is disposed on the radial outside of a shaft member 2 formed from a hollow cylindrical body or solid cylindrical body made of a resin containing a conductive agent. The elastic layer 3 is formed by transferring a coating material comprising a silicone rubber material or urethan rubber material containing the conductive agent onto the shaft member 2 from a roll coater 81.
Description
Technical field
The present invention relates to a kind of image processing system that is used for the conductive roll of image processing systems such as electro-photography apparatus such as duplicating machine, printer or electrostatic recording apparatus and uses this conductive roll, particularly reduced the cost techniques that is used to produce conductive roll.
Background technology
Use in the image processing system of electrofax mode at duplicating machine or printer etc., use various conductive rolls, exemplify and be useful on the charged roller that keeps body to give electric charge to sub-images such as photosensitive drums, for making the visual developer roll that non magnetic developer (toner) is supplied to sub-image maintenance body of sub-image on the sub-image maintenance body, with the toner supplying roller of this toner supply to developer roll, be used for keeping toner on the body to be transferred to transfer roll on the recording mediums such as paper sub-image, serve as the intermediate transfer rollers of toner intermediary, removal remains in the clearer that sub-image keeps the toner on the body, can drive in addition or electric conductivity band that driven supporting is used for image processing system makes its band driven roller that can walk etc.
In the past, use such conductive roll as these conductive rolls, on the periphery of conductive shaft member, form by by cooperating conductive agent to give the conducting rubber of electric conductivity or the conductive elastic layer that macromolecular elastomer, macromolecule foam etc. constitute, further on its periphery, form resin bed etc. as required and film.
As such shaft component, except using at for example sulphur automatic steel or aluminium, stainless steels etc. are gone up and are implemented nickel plating, outside the member that zinc-plated grade forms, in order to make roller in light weight, also use by resinous hollow cylinder that contains conductive agent or member that solid cylinder constitutes, in addition, as the mother metal that constitutes conductive elastic layer, except nitrile butadiene rubber (NBR), outside the ethylene propylene diene terpolymers (EPDM), also can use silicon rubber, urethane rubbers etc. are (for example, with reference to 2004-No. 150610 communiques of TOHKEMY, 2004-No. 151616 communiques of TOHKEMY).
And, in these well-known documents, under the situation of the elastic layer that constitutes by silicon rubber, the member that expression forms with the method for so-called LIM moulding [Liquid Injection Molding (liquid injection moulding), aqueous silicon rubber injection moulding], this method are to be expelled to aqueous silicon rubber complex in the metal die of the net shape that determines conductive roll and to vulcanize.In addition, under the situation of the elastic layer that constitutes by urethane rubber, represent with so-called polyurethane RIM moulding [Reaction Injection Molding (reaction injection molding, polyurethane reaction injection moulding)] member that method forms, this method is that hybrid injection polyol component and polyisocyanate composition also make its reaction, curing in the metal die of the net shape of decision conductive roll.
Summary of the invention
But, when the method with LIM moulding or RIM moulding forms the elastic layer that is made of silicon rubber or urethane rubber on elastic layer, need the metal die of the many high prices of quantity, the problem that the cost that existing needs on the equipment increases.
The present invention makes in view of the above problems, and its purpose is to provide conductive roll that can reduce the equipment cost that is used to produce and the image processing system that uses this conductive roll.
＜1〉is a kind of conductive roll, in the radial direction outside by resinous hollow cylinder that contains conductive agent or the shaft component that solid cylinder constitutes, disposed the one or more layers elastic layer that constitutes by silicon rubber that contains conductive agent or urethane rubber
To be transferred to above-mentioned shaft component from glue spreader by the coating that silastic material that contains conductive agent or urethane rubber material constitute and form above-mentioned elastic layer.
＜2〉be＜1〉in, the radial direction outside configuration resin bed at above-mentioned elastic layer is transferred to the shaft component that has formed elastic layer to coating from glue spreader and forms this resin bed.
＜3〉be＜1〉or＜2 in, on the one-sided end of the length direction of above-mentioned shaft component, be integrally formed into gear with it.
＜4〉be＜1 〉～＜3 in each in, the above-mentioned resin that forms above-mentioned shaft component is at least a synthetic resin selected from the group who is made of resins for universal use, general engineering plastic and super engineering plastics.
＜5〉be＜4〉in, above-mentioned general engineering plastic or super engineering plastics are polyacetal, polyamide 6, polyamide 66, polyamide 12, polyamide 46, polyamide 6 10, polyamide 6 12, polyamide 11, polyamide MXD6, polybutylene terephthalate, polyoxygenated dimethylbenzene, polyphenylene sulfide, polyphenylene oxide, polyethersulfone, polycarbonate, polyimide, polyamide-imide, polyetherimide, polysulfones, polyetheretherketone, polyethylene terephthalate, polyarylate, teflon or liquid crystal polymer.
＜6〉be＜1 〉～＜5 in each in, the conductive agent that resin contained that forms shaft component is select from the group who is made of carbon black, graphite, tin oxide, titanium dioxide, zinc paste, nickel, aluminium and copper at least a.
＜7〉be＜1 〉～＜6 in each in, above-mentioned shaft component is made hollow cylinder, the enhancing rib that stretches out to the radial direction inboard from its outer peripheral face is set on hollow cylinder.
＜8〉be＜7〉in, the metal shaft radial direction center, that connect hollow cylinder that is configured in above-mentioned hollow cylinder is set on above-mentioned shaft component, metal shaft supports the radial direction medial extremity of above-mentioned enhancing with rib.
＜9〉be＜8〉in, above-mentioned hollow cylinder links a plurality of cylinder elements in the longitudinal direction and constitutes.
＜10〉be＜9〉in, even have the combining mechanism of the above-mentioned cylinder element that under the situation of having removed the length direction force of compression, also can keep adjacent mutually.
＜11〉be＜1 〉～＜10 in each, above-mentioned shaft component has from the length direction both ends towards the central portion diameter and becomes big convex shape.
＜12〉be have＜1～＜11 in each the image processing system of conductive roll.
According to＜1 〉, because will be transferred to above-mentioned shaft component from glue spreader by the coating that silastic material that contains conductive agent or urethane rubber material constitute forms above-mentioned elastic layer, therefore, do not need to use the metal die of a large amount of high prices, only with easy roller coating applying device and drying device, just these rollers can be produced, the needed cost of equipment can be reduced significantly.
According to＜2〉because resin bed also forms by roller coating coating, so can the employed equipment of shared formation elastic layer, can further reduce equipment cost.
According to＜3〉owing on the one-sided end of the length direction of shaft component, be integrally formed into gear, therefore, the gear that rotation drives conductive roll need be installed in addition on electro-photography apparatus with it, can reduce cost as electro-photography apparatus.
According to＜4 〉, owing to form the above-mentioned resin of above-mentioned shaft component is that at least a synthetic resin of selecting from the group of resins for universal use, general engineering plastic and super engineering plastics constitutes, therefore can carry out moulding by widely used resin molding machine makes at an easy rate, in addition, the degree of freedom of moulding product shape can be improved, usability again can also be improved.
According to＜5 〉, because general engineering plastic or super engineering plastics are from polyacetal, polyamide 6, polyamide 66, polyamide 12, polyamide 46, polyamide 6 10, polyamide 6 12, polyamide 11, polyamide MXD6, polybutylene terephthalate, polyoxygenated dimethylbenzene, polyphenylene sulfide, polyphenylene oxide, polyethersulfone, polycarbonate, polyimide, polyamide-imide, polyetherimide, polysulfones, polyetheretherketone, polyethylene terephthalate, polyarylate, select in teflon or the liquid crystal polymer, therefore, these materials can be cheap and obtain simply, and it is little preferably to have bending strength, suction changes little, the characteristic that conductive rolls such as thermotolerance are essential.
According to＜6 〉, owing to form the conductive agent that resin contained of shaft component is select from the group who is made of carbon black, graphite, tin oxide, titanium dioxide, zinc paste, nickel, aluminium and copper at least a, therefore, can give essential specific insulation to conductive roll, in addition, these material flowability and bending strength are good, help forming shaft component.
According to＜7 〉, because above-mentioned shaft component is made of hollow cylinder, the enhancing rib that stretches out to the radial direction inboard from its outer peripheral face is set on hollow cylinder, therefore improved the intensity of resisting the bending that causes by photosensitive drums etc., its result can improve the quality of printed images.
According to＜8 〉, because the metal shaft radial direction center, that connect hollow cylinder that is configured in above-mentioned hollow cylinder is set on above-mentioned shaft component, support the radial direction medial extremity of above-mentioned enhancing by metal shaft, therefore, can further improve shaft component resistant to bending intensity with rib.
According to＜9〉owing to connect a plurality of cylinder elements in the longitudinal direction and constitute above-mentioned hollow cylinder, therefore,, enable with high precision and make conductive roll at low cost because of the length of member the shorten machining precision that improves and the easiness of processing.
According to＜10 〉, even owing to have the combining mechanism that has still kept these cylinder elements to mutually combine under the length direction force of compression having removed, therefore when assembling and safeguard that they can not become scattered here and there when changing, the operation that makes assembling and safeguard becomes easily, can shorten and assemble and safeguard the needed time.
According to＜11〉because being had from the length direction both ends to the central portion diameter, shaft component becomes big convex shape, even therefore form elastic layer, also can easily form the conductive roll of the big convex shape of central portion diameter with certain thickness.When conductive roll is made this convex shape, it is being installed on the image processing system, when pushing its length direction both ends and making it for example contact on the photosensitive drums, can obtain contact uniformly in the longitudinal direction presses, can prevent that when conductive roll is made the member that is made of smooth barrel surface the length direction central portion floats and makes contact be pressed in length direction central authorities step-down.
According to＜12〉owing to have＜1～＜11 in each conductive roll, as mentioned above, can reduce the cost in the production that spends in conductive roll, and then can reduce the cost of image processing system.
Description of drawings
Fig. 1 is the cut-open view of the conductive roll of expression embodiments of the invention.
Fig. 2 is the cut-open view of the conductive roll of another embodiment of expression.
Fig. 3 represents the cut-open view of the conductive roll of an embodiment again.
Fig. 4 represents the stereographic map of the conductive roll of an embodiment again.
Fig. 5 is the side view that expression has the shaft component of heteroid end.
Fig. 6 (a)～Fig. 6 (e) is the cut-open view that expression forms the metal die of hollow cylinder.
Fig. 7 (a)～Fig. 7 (r) is the stereographic map of the warpage example of expression axial region, axle hole, gear part.
Fig. 8 is the stereographic map of the conductive roll of the another embodiment of expression.
Fig. 9 is the stereographic map of the shaft component of expression conductive roll shown in Figure 8.
Figure 10 (a)～Figure 10 (c) is the stereographic map and the cut-open view of expression cylinder element.
Figure 11 (a), Figure 11 (b) are the cut-open views of first variation of the mutual connect mechanism of expression cylinder element.
Figure 12 is the cut-open view of second variation of the mutual connect mechanism of expression cylinder element.
Figure 13 is the cut-open view of the 3rd variation of the mutual connect mechanism of expression cylinder element.
Figure 14 is the stereographic map of the variation of expression shaft component shown in Figure 9.
Figure 15 is the stereographic map of another variation of expression shaft component shown in Figure 9.
Figure 16 (a)～Figure 16 (c) is the stereographic map of the linking method of illustration cylinder element.
Figure 17 is the process chart that the operation of conductive roll of the present invention is made in expression.
Figure 18 is the synoptic diagram of the roller coating formula applying device of expression roller coating method.
Embodiment
Embodiments of the invention are described in detail.Fig. 1 is the cut-open view of the conductive roll of expression present embodiment.Conductive roll 1 forms the elastic layer 3 of electric conductivity on the periphery of shaft component 2, form the resin bed 4 of electric conductivity again on elastic layer 3, but resin bed 4 optional structures.Shaft component 2 is made of resinous solid cylinder 5 and the axial region 6 that is respectively formed on its two ends, and these axial regions 6 are supported on the roller support of not shown electro-photography apparatus at the installment state lower shaft.
Because shaft component 2 is resinous, therefore with compare with its situation of formation such as metal, can strengthen the diameter of shaft component 2 and can not cause weight to increase significantly, in addition, because resin contains conductive agent, therefore shaft component 2 has good electrical conductivity, thus, can give desirable current potential on the surface of conductive roll 1.
As the resin material that is used for shaft component 2, also can get final product so long as have suitable intensity by the material of moulding such as injection moulding, can be suitably selected from resins for universal use and engineering plastics, have no particular limits.Specifically, as engineering plastics, for example can enumerate polyacetal, polyamide [polyamide 6 for example, polyamide 66, polyamide 12, polyamide 46, polyamide 6 10, polyamides 612, polyamide 11, polyamide MXD6 (polyamide that from m-xylene diamine and hexane diacid, obtains) etc.], polybutylene terephthalate, polyoxygenated dimethylbenzene, polyphenylene oxide, polyphenylene sulfide, polyethersulfone, polycarbonate, polyimide, polyamide-imide, polyetherimide, polysulfones, polyetheretherketone, polyethylene terephthalate, polyarylate, liquid crystal polymer, teflon etc.In addition, as resins for universal use, can enumerate polypropylene, acrylonitrile group butadiene styrene (ABS) resin, polystyrene, tygon etc.In addition, also can use melmac, phenolics, silicones etc.They can use a kind separately, also can make up more than 2 kinds or 2 kinds and use.
In above-mentioned material, particularly engineering plastics are best, in addition, acetal resin, polyamide, polybutylene terephthalate, polyphenylene oxide, polyphenylene sulfide, polycarbonate etc., good on mouldability because of thermoplasticity, and also good on physical strength, so also be desirable.Particularly polyamide 66, polyamide MXD6, polyamide 6 12 or their hybrid resin are comparatively ideal.In addition, use heat-curing resin also out of question, but, preferably use thermoplastic resin if consider usability again.
As conductive agent, as long as can be distributed to equably in the resin material, can use various conductive agents, but preferably use Powdered conductive agents such as metal oxide powders such as metal powders such as carbon black powders, powdered graphite, carbon fiber or aluminium, copper, nickel, tin oxide, titanium dioxide, zinc paste, conductive glass powder.Can use a kind of in them separately, also can be used in combination in them two or more.This conductive agent proportional quantity can be selected according to the purposes and the situation of required conductive rollers, makes it to obtain suitable resistance value, the restriction that has nothing special, usually, this conductive agent proportional quantity is 5～40 weight % with respect to the material monolithic of shaft component 2, is preferably 5～20 weight %.
For the specific insulation of shaft component 2, as mentioned above, can be generally 1 * 10 according to the suitably settings such as purposes of roller
0～1 * 10
12Ω cm is preferably 1 * 10
2～1 * 10
10Ω cm, more preferably 1 * 10
5～1 * 10
10Ω cm.
In the material of shaft component 2, in order purpose such as to gain in strength or gain in weight, can cooperate various electric conductivity or dielectric fibrous material or whisker, ferrite etc. as required.Can enumerate that for example fiber such as carbon fibre, glass fibre is as fibrous material, in addition, can enumerate inorganic metals such as potassium titanate must be as whisker.Can use a kind of in them separately, also can be used in combination in them two or more.Can according to the length and the diameter of employed fibrous material or whisker, become main body resin material kind and as suitably selected their proportional quantity such as the roller intensity of purpose.5～70 weight % of material monolithic normally, that special is 10～20 weight %.
In Fig. 1, as shaft component 2, represented the member that constitutes by solid cylinder 5, but also can use the shaft component 12 that constitutes by hollow cylinder 13 to replace shaft component 2 that Fig. 2 is the cut-open view that the conductive roll 11 of shaft component 12 has been used in expression.Conductive roll 11 forms elastic layer 3, resin bed 4 successively on the outside of shaft component 12, identical with conductive roll 1 in this respect.Shaft component 12 is by forming with joint hollow cylinder 13 such as bonding and lid member 14, and hollow cylinder 13 is made of cylindrical portion 13a, bottom 13b and axial region 6, and lid member 14 is made of cap 14a and axial region 6.Both sides' axial region 6 is under installment state, and axle is supported on the roller support of not shown electro-photography apparatus.
By using hollow shaft component 12 to replace shaft component 2, can further alleviate the weight of shaft component, when the external diameter of conductive roll surpasses 12mm, be preferably made hollow structure especially.
Fig. 3 is the cut-open view of expression with the conductive roll 21 of shaft component 22 replacement shaft components 12, and Fig. 4 is its stereographic map.Shaft component 22 is by forming with joint hollow cylinder 23 such as bonding and lid member 24, hollow cylinder 23 is made of cylindrical portion 23a, bottom 23b, gear part 7 and axle hole 8, on the other hand, lid member 24 is the same with conductive roll 11, is made of cap 24a and axial region 6.
8 of axial region 6 and axle holes are supported on the roller support of not shown electro-photography apparatus, and in addition, the rotary driving force of conductive roll is directly delivered on the shaft component through gear part 7.Even have the hollow cylinder 23 of such gear part 7, owing to make shaft component 22 resinous, so can form shaft component by injection moulding, when constituting shaft component 22 by metal, the situation that gear part must be made independent member compares, and can reduce the cost of shaft component.In addition, gear part 7 can be that horizontal gear also can be a spiral gear, can carry out one-body molded.
In addition, the thickness of 13a of hollow cylinder portion or 23a, preferably thinner as long as intensity is enough for lightweight, for example can make 0.3～3mm, be more preferably and make 1～2mm.
As using the compounding ingredient that constitutes by above-mentioned resin material and conductive agent etc. to form the method for shaft component 2,12,22, have no particular limits, can be according to kind of resin material etc., suitably selected from the well-known method of forming, can use the injection moulding that uses metal die usually.
Fig. 5 is the cut-open view that is expressed as the metal die 30 of type hollow cylinder 23 under closing state, metal die 30 is made of tube mould 31, core mold 32 and runner mould 33, by these moulds being separated from each other and approaching, thus open metal die and close metal die.Under the state of having closed metal die 30, in the die cavity 35 that forms by tube mould 31 and core mold 32, inject resin from first sprue 36 through runner 37 and the 2nd sprue 34, make its cooling curing in metal die 30 then, can form hollow cylinder 23.By using hot-runner method, also can not use the material in the runner 37 lavishly.
At this,, therefore hollow cylinder 23 can be made in a circumferential direction member uniformly owing to tube mould 31, core mold 32 have not divided in a circumferential direction structure.And, also can import inert gas, form hollow part by the pressure of this gas and replace using core mold 32.
Fig. 6 is the side view of the different shaft component of expression end construction, Fig. 6 (a), Fig. 6 (b) expression constitutes the example at both ends with axial region 6, Fig. 6 (c) expression constitutes the both sides' of end example with axle hole 8, the end that Fig. 6 (d), Fig. 6 (e) expression constitutes in the both ends with axial region 6 is with the example of 8 formation the other end, axle hole.In addition, the example of Fig. 6 (b)～Fig. 6 (e) is illustrated in gear part 7 is set on the end, with the exception of this, also can gear part 7 be set on the both sides of end, and under this situation, shaft component is undertaken the effect of intermediary's transmission of power.No matter under any situation, gear part 7 can form as one with cylindrical portion or columnar portion.
At this, the member shown in Fig. 6 (a) is corresponding with shaft component 2 or 12, and the member shown in Fig. 6 (d) is corresponding with shaft component 22.
In addition, shaft component 2 shown in Figure 6,12 axial region 6, as representing with stereographic map among Fig. 7 (a), make the cylindrical of simple shape, can use following these to replace it, for example can use the axial region of the shape shown in Fig. 7 (b) with tapering, enforcement shown in Fig. 7 (c) axial region of shape of D tee section cut, the axial region of the shape shown in Fig. 7 (d) with prism-shaped, the axial region of the shape shown in Fig. 7 (e) with pointed nose, the axial region of the shape shown in Fig. 7 (f) with endless groove, the axial region of the shape shown in Fig. 7 (g) with stage portion, the axial region of the shape that on outer peripheral face, is formed with spline or gear usefulness outer toothed portion shown in Fig. 7 (h) etc., similarly, as axle hole 8, except axle hole in Fig. 7 (i) with the simple circular hole shape shown in the stereographic map, can use the axle hole of the D tee section shape shown in Fig. 7 (j), the axle hole of the plurality of stepped serrations shape shown in Fig. 7 (k), the axle hole of the square hole shape shown in Fig. 7 (l), the axle hole that on inner peripheral surface, is formed with the internal tooth portion that spline or gear use shown in Fig. 7 (m), axle hole shown in Fig. 7 (n) with cone hole part, the axle hole of the circular hole of the band keyway shown in Fig. 7 (o) etc.
In addition, the gear part 7 that also can use the replacement Fig. 7 (r) such as flange part shown in the stage portion shown in Fig. 7 (p) or Fig. 7 (q) to represent with stereographic map.
Fig. 8 represents to replace with shaft component 52 stereographic map of the conductive roll 51 of shaft component 12 shown in Figure 2, and Fig. 9 represents the stereographic map of shaft component 52.Shaft component 52 is made of hollow cylinder 53 and metal shaft 56, the enhancing rib 55 that stretches out to the radial direction inboard from its outer peripheral face is set on hollow cylinder 53, and hollow cylinder 53 links a plurality of cylinder elements 54 and constitutes on its length direction.Like this, because hollow cylinder 53 is made the member that is made of a plurality of cylinder elements 54, also we can say in the longitudinal direction and cut apart, compare with the situation of integrally formed of in the past metal tube or resin, the length of member shortens, and therefore can improve machining precision, and the processing of each member becomes easy, therefore, can boost productivity.
Penetrate the metal shaft 56 of hollow cylinder in the radial direction center configuration of hollow cylinder 53, metal shaft 56 becomes supporting, and these strengthen the radial direction medial extremity of ribs 55, by this structure, can improve the rigidity of roller, can improve resistant to bending intensity.
Bindiny mechanism as interconnecting cylinder element 54 has no particular limits, and for example, can make structure shown in Figure 10, can cooperatively interact by its end to carry out combination.Illustrated cylinder element 54, at one end the 61A of portion side has protuberance 62 and spline pin 63 ((a) among the figure), has recess 65 and spline hole 66 ((b) among the figure) in the other end 61B side.(c) among the figure is the sectional view of cylinder element 54.By making cylinder element 54, can make protuberance 62 cooperate combination securely mutually with spline hole 66 respectively with recess 65, spline pin 63 making under the end 61A state relative while making its rotation chimeric with end 61B with this spline structure.Because roller rotates it to use, therefore, the bindiny mechanism between the member preferably has the anti-locking mechanism of rotation, in addition, in illustrated cylinder element 54, and on protuberance 62 and recess 65, the bevel of the usefulness of implementing to center
Below, illustration changes the variation of the mutual bindiny mechanism of the cylinder element of above-mentioned example.First variation is by being pressed into the next combining mechanism in conjunction with cylinder element of adjacent cylinder element 54D mutually, shown in Figure 11 (a), on the end of the urceolus 75 of member 54D, step side face 75c, 75d are set, portion at one end, radial direction is inboard to become protruding, in the other end, it is protruding that the radial direction outside becomes, the diameter d of the step side face 75c by making the side's side that becomes outer peripheral face
1Diameter d greater than the step side face 75d of the opposing party's side that becomes inner peripheral surface
2, shown in Figure 11 (b), can make their cylinder element 54D be pressed into mutually and fix.
As shown in figure 12, second variation is to make the mutual butt of end face of cylinder element 54E and twine jointing tape 78 on the outer peripheral face of the joint portion that comprises them, by jointing tape 78 cylinder element 54E is mutually combined.
Figure 13 is the cut-open view of the roller main body of expression the 3rd variation, by being threadedly engaged with adjacent cylinder element 54 mutually in conjunction with these cylinder elements.On an end of the urceolus 76 of member 54F, outer screw section 76f is set, female screw portion is set on the other end.And as long as they are made and can be threadedly engaged with.
In the present invention, the shape of shaft component 52 self is had no particular limits, can make suitable desirable shape.For example, with member that the length direction end contacts on the suitable axial region etc. of shapes such as formative gear portion 57 (with reference to Figure 14) or D tee section cutting shape, perhaps only make on the end of member engages after the roller main body forms of gear part, thereby can make the shape that has desirable these function parts on the length direction end of shaft component 52.Thus, can use axle more in addition or needn't carry out complicated processing axle, and, also have to make that carrying out centering of function part becomes easy advantage.
In addition, the profile of shaft component 52 is not limited to the drum of Fig. 9 shown in waiting, and also can make the profile that becomes big convex shape to the central portion diameter that has from the length direction both ends as shown in Figure 15.Under the situation of integrally formed of in the past metal tube or resin, the profile of roller main body is made straight cylindrical shape usually, be difficult to make the profile of the central portion convex shape bigger etc., need to make the moulding of metal die of great number and the film thickness monitoring when grinding elastic layer 3, coating (impregnating) resin bed 4 etc. than both ends diameter.In the present embodiment,, reduced the difficulty of processing of each member, therefore, can tackle convex shape etc. easily, also can guarantee machining precision well by cutting apart hollow cylinder 53 in the longitudinal direction.In addition, in the present embodiment, the number of the member that forms the roller main body is had no particular limits, as long as consider to carry out suitably determining from intensity and cost-effectivenes aspect.
As the material that forms hollow cylinder 53, can use and the material identical materials that before shaft component 2 is illustrated, in addition, for example can use and on sulphur automatic steel, aluminium, stainless steel etc., implemented metal shaft that nickel plating, zinc-plated etc. material forms as metal shaft 56.
Combination between hollow cylinder 53 and the metal shaft 56, usually can be undertaken by habitual bonding agent etc., have no particular limits, but for example also can use following method, under the state that has heated cylinder element 54 with stove etc., penetrate metal shaft 56, cool off then, metal shaft 56 is fixed thereby make the resin material of cylinder element 54 shrink.In addition, as this combining mechanism, be preferably in (not shown) such as groove or the cuttings of D tee section are set on the metal shaft 56.The combining mechanism of this situation is preferably the same with the situation of above-mentioned member to have the anti-locking mechanism of rotation, and thus, the metal shaft 56 in the time of can preventing to use dallies.
The conductive roll 51 of present embodiment can be made like this, by after forming shaft component 52 in conjunction with a plurality of cylinder elements 54 in the longitudinal direction, elastic layer 3 is set on its periphery.At this, as the order that forms hollow cylinder 53 by the cylinder element 54 of present embodiment, have no particular limits, for example, under the situation of the cylinder element with engagement formation 54 shown in Figure 10, the member that can directly mutually combine is made hollow cylinder 53, in addition, do not having under the situation of engagement formation, shown in Figure 16 (a)～(c), can use after metal shaft 56 is run through each cylinder element 54 successively, interfix by bonding agent etc. and make the method for roll shape.
Conductive agent is that purpose is engaged with the electric conductivity of control elastic layer 3.Can use any of electronic conduction agent and ionic conductive agent as conductive agent, when using the electronic conduction agent, the carbon series conductive agent is desirable just obtaining higher electric conductivity this respect with a spot of carbon series conductive agent of interpolation.Preferably use Ketjen black and acetylene black as the carbon series conductive agent, also can use China ink carbon black, thermal decomposition carbon black, graphite etc. such as rubber such as SAF, ISAF, HAF, FEF, GPF, SRF, FT, MT carbon black, oxidized black as the carbon series conductive agent.
As the electronic conduction agent beyond the de-carbon system, can use the particulate of metal oxides such as ITO, tin oxide, titanium dioxide, zinc paste; The oxide of metals such as nickel, copper, silver, germanium; Electric conductivity titanium dioxide whisker, the such transparent whisker of electric conductivity barium titanate whisker etc.
As ionic conductive agent, can use the organic ion conductive agent such as perchlorate, chlorate, hydrochloride, bromate, iodate, borofluoride, sulfate, alkyl sulfate, carboxylate, sulfonate of ammoniums such as octadecyl Trimethylamines such as the basic trimethyl ammonium of tetraethyl ammonium, TBuA, lauryl trimethyl ammonium etc. 12 (alkane), the basic trimethyl ammonium of 16 (alkane), stearic trimethyl ammonium, benzyl trimethyl amine, sex change aliphatics dimethyl ethyl ammonium; Inorganic ions conductive agents such as the perchlorate of alkaline metal such as lithium, sodium, calcium, magnesium or alkaline-earth metal, chlorate, hydrochloride, bromate, iodate, borofluoride, trifluoromethyl sulfate, sulfonate.
Also can mix the conductive agent of use more than 2 kinds or 2 kinds as conductive agent, in this case, even variation in voltage that adds and environmental change also can stably present electric conductivity.Can exemplify in the carbon series conductive agent conductive agent that the electronic conduction agent that mixes beyond the de-carbon system or ionic conductive agent form as mixing example.
The hardness of elastic layer 3 has no particular limits, but when conductive roll 1 was used as developer roll, its ASKER-C (ア ス カ) hardness was below 80 degree or 80 are spent, preferably 30～70 degree.In this case, when hardness is spent above 80, can not show and relax the original function of elastic layer that is applied to the stress on conductive roll and the toner, for example, conductive roll and sub-image keep the contact area of body to diminish, and might can not carry out good development.And, damage toner easily, be created in bonding toner etc. on photoreceptor or the stratification scraper plate and to form image easily bad.On the contrary, when making lower hardness, it is big that the friction force of toner and photoreceptor or stratification scraper plate becomes, and it is bad to produce image such as beat.
Owing to when this elastic layer 3 uses and butts such as photoreceptor or stratification scraper plate, therefore, when hardness is set at soft, preferably reduce compression set, specifically, preferably distortion made below 20% or 20% as far as possible.
The surfaceness of elastic layer 3 has no particular limits, but with conductive roll 1 when not having the developer roll of resin bed 4, make JIS10 point mean roughness Rz and be 15 μ m or below the 15 μ m, being preferably made Rz is 1～10 μ m.When surfaceness Rz surpasses 15 μ m, there are the bed thickness of toner layer of a part of developer (toner) and the charged impaired situation of homogeneity, by making surfaceness Rz is 15 μ m or below the 15 μ m, can improve the tack of toner, and the image variation that the wearing and tearing of roller cause can prevent from more reliably to use for a long time the time.
For surface texture and the raising permanance of improving conductive roll, can be at the radial direction arranged outside resin bed 4 of elastic layer 3, in order to increase the compatibility of elastic layer 3 and resin bed 4, when using silicon rubber to constitute elastic layer 3, the most handy polyurethane denaturing acrylamide acid resin, urethane resin, acryl resin, polyamide, fluororesin, the alkyd melmac constitutes the host of resin bed 4, when using urethane rubber as elastic layer 3, preferably the host of resin bed 4 is decided to be polyurethane, thus, cause the reaction of unreacting substance and resin bed 4 in the elastic layer 3 easily, for example, cause reaction with unreacted carbimide etc. etc. easily, therefore, can promote the growth of resin bed 4.
The conductive agent that can use the identical conductive agent of conductive agent that mixed with elastic layer 3 to be mixed as resin bed 4.
Manufacture method to conductive roll 1 describes below, Figure 17 is the process chart that expression is used to make the operation of conductive roll 1, at first, in shaft component preparatory process 91, inspection is from the shaft component of acquisitions such as outside order and prepare shaft component, then in elastic layer working procedure of coating 92, on the radial direction outside of shaft component 2,, make its drying (elastic layer drying process 93) then with the coating of glue spreader coating will becoming elastic layer 3.
In the time of will on conductive roll 1, resin bed 4 being set, in the resin working procedure of coating 94 after following elastic layer drying process 93, after the glue spreader coating and forming resin bed 4, in resin bed drying process 95, make its drying, the manufacturing process that finishes conductive roll 1.
Summary with reference to the coating in the schematic view illustrating elastic layer working procedure of coating 92 of glue spreader shown in Figure 180.The glue spreader 81 that forms elastic layer 3 has application roll 82, coating pan 83 and pick-up roller 84, shaft component 2 configured in parallel of this application roll 82 and conductive roll 1 and with the side face butt of shaft component 2 be rotated and with the applying coating on the circumference on the side face of shaft component 2, this coating pan 83 is accommodated this coating, this pick-up roller 84 contacts the coating P0 in side face and the coating pan 83, and side face and application roll 82 mutual butts be rotated, above-mentioned coating P0 is sucted and supply with application roll 82 from coating pan 83.
In this glue spreader 81, be housed in the coating P0 in the coating pan 83, attached on the surface of the pick-up roller 84 of rotation and sucted.Suct the coating P1 on the pick-up roller 84, its part is fed into pick-up roller 84 butts and on the application roll 82 that is rotated, and supplies to the coating P2 on the application roll 82, similarly is applied on the side face of shaft component 2, forms and will become filming of elastic layer 3.
As the coating that uses in elastic layer working procedure of coating 92, use will contain the silastic material of conductive agent or the coating that the urethane rubber material dissolves forms in solvent, as the solvent that is used for this, can use toluene, MEK (methyl ethyl ketone).
At this, in order to improve the cementability of shaft component 2 and elastic layer 3, be preferably on the surface of shaft component 2 and apply priming paint, for example can use a kind of various priming paint such as synthetic rubber class, acrylic compounds, polyurethanes, epoxies, silicone resin class or will wherein mix more than 2 kinds or 2 kinds to be used as priming paint.
When resin bed 4 is formed on the outside of elastic layer 3, also can form by method without the glue spreader coating, but the equipment that forms elastic layer 3 being directly used on formation resin bed 4 these aspects, preferably by glue spreader coating formation resin bed 4.In this case, the shaft component 2 that has formed elastic layer 3 can be immersed in the coating, replace locational shaft component 2 shown in Figure 180, the coating that can use the polyurethane that will contain conductive agent or polyurethane denaturing acrylamide acid resin to be dissolved in to form in MEK, MIBK (methyl isobutyl ketone) equal solvent is as the coating of this situation.
On the industry utilizability
Conductive roll of the present invention be suitable for as charged roller, developer roll, transfer roll, Developer roll, intermediate transfer rollers, toner supplying roller, clearer, band driven roller, paper supply Roller etc. and be installed in common duplicator, Common Facsimile Machine, laser printer, color laser In the image processing system such as printer, ink-jet printer.
Claims (11)
1. a conductive roll outside the radial direction by resinous hollow cylinder that contains conductive agent or the shaft component that solid cylinder constitutes, has disposed the one or more layers of elastic layer that is made of silicon rubber that contains conductive agent or urethane rubber,
To be transferred to above-mentioned shaft component from glue spreader by the coating that silastic material that contains conductive agent or urethane rubber material constitute and form above-mentioned elastic layer;
Constitute above-mentioned shaft component by hollow cylinder, the enhancing rib that stretches out to the radial direction inboard from its outer peripheral face is set in hollow cylinder.
2. conductive roll according to claim 1, the radial direction outside configuration resin bed at above-mentioned elastic layer is transferred to the shaft component that has formed elastic layer with coating from glue spreader and forms this resin bed.
3. conductive roll according to claim 1 and 2 is integrally formed into gear with it on the one-sided end of the length direction of above-mentioned shaft component.
4. conductive roll according to claim 1 and 2 forms the above-mentioned resin of above-mentioned shaft component, is at least a synthetic resin of selecting from the group who is made of resins for universal use, general engineering plastic and super engineering plastics.
5. conductive roll according to claim 4, it is characterized in that above-mentioned general engineering plastic or super engineering plastics are polyacetal, polyamide 6, polyamide 66, polyamide 12, polyamide 46, polyamide 6 10, polyamide 6 12, polyamide 11, polyamide MXD6, polybutylene terephthalate, polyoxygenated dimethylbenzene, polyphenylene sulfide, polyphenylene oxide, polyethersulfone, polycarbonate, polyimide, polyamide-imide, polyetherimide, polysulfones, polyetheretherketone, polyethylene terephthalate, polyarylate, teflon or liquid crystal polymer.
6. conductive roll according to claim 1 and 2, the conductive agent that resin contained that forms shaft component are select from the group who is made of carbon black, graphite, tin oxide, titanium dioxide, zinc paste, nickel, aluminium and copper at least a.
7. conductive roll according to claim 1 and 2 on above-mentioned shaft component, is provided with the metal shaft radial direction center, that run through hollow cylinder that is configured in above-mentioned hollow cylinder, and metal shaft supports the radial direction medial extremity of above-mentioned enhancing with rib.
8. conductive roll according to claim 7 links a plurality of cylinder elements in the longitudinal direction and constitutes above-mentioned hollow cylinder.
9. conductive roll according to claim 8 is even have the combining mechanism of the combination of the above-mentioned cylinder element that also can keep adjacent mutually under the situation of having removed the length direction force of compression.
10. conductive roll according to claim 1 and 2, above-mentioned shaft component have from the length direction both ends to the big convex shape of central portion diameter change.
11. an image processing system has each described conductive roll in the claim 1～10.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005063801 | 2005-03-08 | ||
| JP2005063801 | 2005-03-08 | ||
| JP2006027426 | 2006-02-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101414140B (en) * | 2007-10-15 | 2010-11-24 | 林庚贤 | Method for manufacturing rolling wheel for carbon powder box and rolling wheel made by the same |
| CN101887224A (en) * | 2010-06-22 | 2010-11-17 | 富美科技有限公司 | Positioning structure for photosensitive drum of selenium drum |
| CN102411278A (en) * | 2010-09-22 | 2012-04-11 | 东海橡胶工业株式会社 | Electrified Roller Used For Electric Camera Device |
| JP5638626B2 (en) * | 2010-12-16 | 2014-12-10 | 株式会社ブリヂストン | OA roller manufacturing method and OA roller |
| CN102073249A (en) * | 2011-01-21 | 2011-05-25 | 珠海天威飞马打印耗材有限公司 | Magnetic roller and processing box |
| CN102375378B (en) * | 2011-11-11 | 2013-05-15 | 珠海天威飞马打印耗材有限公司 | Developing roller |
| CN108828920A (en) * | 2018-06-08 | 2018-11-16 | 淮安展德光电科技有限公司 | A kind of high rigidity organic light guide drum coating process |
| JP7113881B2 (en) * | 2019-12-11 | 2022-08-05 | エスケー ネクシリス カンパニー リミテッド | Cathode assembly for plating equipment |
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| CN1112606C (en) * | 1997-07-01 | 2003-06-25 | 钟渊化学工业株式会社 | Developing roller and developing device using the roller |
| CN1459675A (en) * | 2002-05-20 | 2003-12-03 | 广州市刘氏橡塑制品有限公司 | Charging roll used for laser printing machine and its manufacturing method |
| JP2004151616A (en) * | 2002-11-01 | 2004-05-27 | Bridgestone Corp | Conductive roller and image forming apparatus using the same |
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- 2006-03-08 CN CNB2006100581734A patent/CN100461019C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112606C (en) * | 1997-07-01 | 2003-06-25 | 钟渊化学工业株式会社 | Developing roller and developing device using the roller |
| CN1459675A (en) * | 2002-05-20 | 2003-12-03 | 广州市刘氏橡塑制品有限公司 | Charging roll used for laser printing machine and its manufacturing method |
| JP2004151616A (en) * | 2002-11-01 | 2004-05-27 | Bridgestone Corp | Conductive roller and image forming apparatus using the same |
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