CN204832775U - Light -emitting -diode array heads positioning method and image forming apparatus - Google Patents
Light -emitting -diode array heads positioning method and image forming apparatus Download PDFInfo
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- CN204832775U CN204832775U CN201520569260.0U CN201520569260U CN204832775U CN 204832775 U CN204832775 U CN 204832775U CN 201520569260 U CN201520569260 U CN 201520569260U CN 204832775 U CN204832775 U CN 204832775U
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Abstract
The utility model provides an even when reversing the developer roll, also can suppress the light -emitting -diode array heads positioning method and image forming apparatus that the tinting color disperses to the outside from the developer roll. Embodiment's light -emitting -diode array heads positioning method and image forming apparatus has: photoreceptor, developer roll, restricting board, and thin slice part. After the photoreceptor is expose, form the electrostatic latent image on its surface. The developer roll can just set up with reversing, and during corotation, the developer that will contain the tinting color in the development position is supplied with to the surface of photoreceptor, with static image development. Restricting board limits the bed thickness of the developer attached to on the developer roll in the restriction position. The thin slice parts limit the surface configuration of the developer roll between position and the development position relatively. In addition, the thin slice part have with the butt portion of developer butt. In addition, the thin slice part has the flexion, and this flexion, separates from the developer towards the development position along with following butt portion gradually.
Description
Technical field
Embodiment of the present utility model relates to a kind of image processing system.
Background technology
There is a kind of image processing system, image-carrier is formed visual image (toner image).Image processing system has: photoreceptor, developer.Image processing system, based on image information, photoreceptor forms electrostatic latent image.Developer utilizes toner by latent electrostatic image developing.The developer of two-component visualization way has: be mixed with the developer of toner and carrier, developer roll and confinement plate.The developer of confinement plate to the surface of developer roll limits.On the surface of developer roller, by confinement plate, the thickness of restriction developer.
In order to suppress the toner from the developer on developer roll to disperse, the leading section of thin slice abuts between confinement plate and developing location.
Thin slice is plane film of synthetic resin.Thin slice is relative to the surperficial tilted configuration of developer roll.The base end part of thin slice is separated from the surface of developer roll.The base end part of thin slice and the leading section of the thin slice sense of rotation when the development of developer roll arranges according to this order.
In recent years, there is following situation, that is, in order to reduce fixing heat, especially in high speed machine etc., use low melt toner.Low melt toner is easily fixed, and therefore, sometimes with the suitable cycle, developer roll is rotated to the direction contrary with rotation during development.
But, become following shape body with the plane thin slice that developer roll tilts to abut, if i.e., developer roll reversion, so relatively sense of rotation, the state abutted inversely.Therefore, when the reversion of developer roll, the front end of thin slice easily invades developer layer.When the reversion of developer roll, sometimes scrape off developer from developer roll.At this moment, likely carrier and toner disperse from developer roll.Sometimes, developer cannot be scraped off.At this moment, the front end of thin slice and developer power friction.Therefore, toner disperses from sliding part sometimes.
Utility model content
Even if when problem to be solved in the utility model is to provide one to be reversed by developer roll, the image processing system that toner externally disperses from developer roll also can be suppressed.
The image processing system of embodiment has: photoreceptor, developer roll, confinement plate and sheet material.After photoreceptor is exposed, form electrostatic latent image on its surface.Developer roll, can positive and negatively rotatably be arranged, during rotating forward, on the surface of developing location by the developer replenishing to photoreceptor that comprise toner, by latent electrostatic image developing.Confinement plate limits in the thickness of restriction site to the developer be attached on developer roll.The surface configuration of the developer roll between the relative restriction site of sheet material and developing location.In addition, sheet material has the abutting part abutted with developer.In addition, sheet material has bend, and this bend, along with from abutting part towards developing location, is separated gradually from developer.
Described sheet material by making the both ends of the Width of thin slice relative, and is fixed separated from each other, is formed with becoming U-shaped by described wafer warpage.
Described thin slice is sheet of polyurethane.
Described bend, in the leading section of the described sheet material towards described developer roll, is formed as U-shaped, and described abutting part is formed at the side in the side of the described sheet material clipping described bend.
Described sheet material is configured to, and from the connection plane of the relatively described developer roll of the base end part in the direction that described developer roll is separated, acutangulates and tilts.
By the utility model, by having sheet material, even if can when making developer roll reverse, also the toner from developer roll can be suppressed to disperse, wherein this sheet material has: abutting part, and the surface configuration of the developer roll between relative restriction site and developing location, abuts with developer; And bend, along with from abutting part towards developing location, leave gradually from developer.
Embodiment
Hereinafter, with reference to the accompanying drawings of the image processing system of embodiment.In addition, in each figure, for same structure, mark identical label.
Fig. 1 is the profile schema diagram of the one-piece construction example of the image processing system representing embodiment.Fig. 2 is the profile schema diagram of the image forming part of the image processing system representing embodiment.Fig. 3 is the enlarged drawing in the A portion in Fig. 2.
As shown in Figure 1, the image processing system 100 of present embodiment has: control panel 1, scanner portion 2, printer portion 3, thin slice incorporating section 4 and delivery section 5.
Control panel 1, according to the operation of operator, makes image processing system 100 work.
The image information of duplicating object is read as the light and shade of light by scanner portion 2.Scanner portion 2 exports read image information to printer portion 3.
Printer portion 3, based on the image information from scanner portion 2 or outside, by the developer containing toner etc., forms output image (hereinafter referred to as toner image).Toner image is transferred on the surface of thin slice S by printer portion 3.Toner image on the surface of the 3 couples of thin slice S in printer portion applies heat and pressure, is fixed on by toner image on thin slice S.
Thin slice incorporating section 4 coordinates printer portion 3 to form the time of toner image, and thin slice S is supplied to printer portion 3 one by one.Thin slice incorporating section 4 has multiple paper feeding cassette 20A, 20B, 20C.Each paper feeding cassette 20A, 20B, 20C receive the thin slice S of default size and kind respectively.Each paper feeding cassette 20A, 20B, 20C have pickup roller 21A, 21B, 21C respectively.Thin slice S takes out from each paper feeding cassette 20A, 20B, 20C by each pickup roller 21A, 21B, 21C one by one.The thin slice S of taking-up is supplied to delivery section 5 by pickup roller 21A, 21B, 21C.
Delivery section 5 has: conveying roller 23 and register roller 24.The thin slice S supplied from pickup roller 21A, 21B, 21C is delivered to register roller 24 by delivery section 5.Toner image is transferred to the time of thin slice S by register roller 24 according to printer portion 3, conveying thin slice S.
Conveying roller 23 makes the nip N of the front end crash register roller 24 of the throughput direction of thin slice S.Conveying roller 23 bends by making thin slice S, adjust on throughput direction the position of front end of thin slice S.
The front end of the thin slice S sent from conveying roller 23 is integrated by register roller 24 in nip N.In addition, thin slice S is delivered to transfer section 28 side described later by register roller 24.
Printer portion 3 has: image forming part 25Y, 25M, 25C, 25K; Exposure portion 26, intermediate transfer belt 27, transfer section 28, fuser 29 and transfer belt cleaning unit 61.
The toner image be transferred on thin slice S is formed on intermediate transfer belt 27 by image forming part 25Y, 25M, 25C, 25K respectively.
Intermediate transfer belt 27 is made up of endless belt.Intermediate transfer belt 27 is endowed tension force by the multiple rollers abutted with inner peripheral surface.Intermediate transfer belt 27 is supported for flat with being stretched.Stretching ground in the inner peripheral surface of intermediate transfer belt 27 support in direction farthest away from position while abut with backing roll 28a.Stretching ground in the inner peripheral surface of intermediate transfer belt 27 support in direction farthest away from the another side of position abut with transfer belt roller 60.
Backing roll 28a forms a part for transfer section 28 described later.Intermediate transfer belt 27 is guided to secondary transfer printing position by backing roll 28a.
Intermediate transfer belt 27 is guided to cleaning position by transfer belt roller 60.
In the diagram following side of intermediate transfer belt 27, from transfer belt roller 60 to the side of transfer section 28, set gradually image forming part 25Y, 25M, 25C, 25K.Image forming part 25Y, 25M, 25C, 25K region between transfer belt roller 60 and backing roll 28a, separated from each other configuration.
As shown in Figure 2, image forming part 25Y, 25M, 25C, 25K has cylindric photosensitive drums 30 (photoreceptor) respectively.Toner image that is yellow, pinkish red, bluish-green, black is formed in photosensitive drums 30 by image forming part 25Y, 25M, 25C, 25K respectively.
The structure of image forming part 25Y, 25M, 25C, 25K is respectively except developer 32Y, 32M, 32C, 32K described later, and other structures are common.In addition, the structure of developer 32Y, 32M, 32C, 32K is respectively except the color of the toner of storage, and other structures are common.
Below, the structure of the image forming part 25Y comprising developer 32Y is described as center.As required, points different from image forming part 25Y in the structure of image forming part 25M, 25C, 25K is described.
Photosensitive drums 30 has photoreceptor layers 30a on surface.Photosensitive drums 30, by omitting illustrated motor, rotates in diagram clockwise direction.
Around photosensitive drums 30, charged device 31, developer 32Y, transfer roll 33, cleaning unit 34 are set in diagram clockwise direction and remove electrical equipment 35.
In the below of charged device 31 and developer 32Y, be provided with exposure portion 26.
Charged device 31 makes photosensitive drums 30 charged.Charged device 31 has charged electrode.Such as, charged electrode is made up of discharge electric wire or needle electrode.
Exposure portion 26, based on image information, to the surface of charged photosensitive drums 30, is irradiated by the laser beam L of light emitting control.Laser beam L irradiate photosensitive drums 30 surface in, between charged device 31 and developer 32Y.Exposure portion 26 also can adopt: replace laser beam L, the structure of irradiation LED light.
The exposure portion 26 of image forming part 25Y (25M, 25C, 25K) is supplied to the image information of yellow (pinkish red, bluish-green, black).After charged, 26 pairs, exposure portion photosensitive drums 30 irradiates the laser beam L based on image information.Exposure portion 26 forms the electrostatic latent image of the image information based on yellow (pinkish red, bluish-green, black) on the surface of photosensitive drums 30.
Developer 32Y (32M, 32C, the 32K) collecting bag of image forming part 25Y (25M, 25C, 25K) contains the developer DY (DM, DC, DK) of the toner of yellow (pinkish red, bluish-green, black).
Developer 32Y makes the charged toner of the developer DY of storage.The surface of developer 32Y to photosensitive drums 30 supplies charged toner.Toner, according to electrostatic latent image, is attached on the surface of photosensitive drums 30.The latent electrostatic image developing that developer 32Y will be formed by exposure portion 26.
Developer 32Y carries out the development based on two-component visualization way.The detailed construction of developer 32Y is aftermentioned.
It is relative with photosensitive drums 30 that transfer roll 33 clips intermediate transfer belt 27.Transfer roll 33 abuts with the surface of photosensitive drums 30.Transfer roll 33 by the toner image transfer printing (primary transfer) on the surface of photosensitive drums 30 on intermediate transfer belt 27.
Image forming part 32Y applies transfer bias in primary transfer position to transfer roll 33.
Cleaning unit 34 is undertaken scraping off etc. by the non-transfer toner on the surface to photosensitive drums 30 and removes non-transfer toner after primary transfer.
Except electrical equipment 35 is relative with the photosensitive drums 30 through cleaning unit 34.Except electrical equipment 35 makes illumination penetrate the surface of photosensitive drums 30.Except electrical equipment 35 pairs of photosensitive drums 30 are carried out except electricity.
As shown in Figure 1, in intermediate transfer belt 27, in the position adjacent with image forming part 25K, configuration transfer section 28.
Transfer section 28 has: backing roll 28a and secondary transfer roller 28b.Secondary transfer roller 28b, between backing roll 28a, clamps intermediate transfer belt 27.The position that secondary transfer roller 28b and middle hand transfer belt 17 abut mutually is secondary transfer printing position.
Charged toner image on intermediate transfer belt 27 is transferred on the surface of thin slice S of secondary transfer printing position by transfer section 28.Transfer bias is given in transfer section 28 pairs of secondary transfer printing positions.Toner image on intermediate transfer belt 27 is transferred on thin slice S by transfer bias by transfer section 28.
Fuser 29 couples of thin slice S give heat and pressure.Fuser 29 passes through this heat and pressure, by fixing for the toner image be transferred on thin slice S.
Transfer belt cleaning unit 61 is relative with transfer belt roller 60.Transfer belt cleaning unit 61 clips intermediate transfer belt 27.The toner on the surface of intermediate transfer belt 27 scrapes off by transfer belt cleaning unit 61.The toner scraped off is recycled in useless powder box by transfer belt cleaning unit 61.
Printer portion 3 has inverting units 36.The thin slice S discharged from fuser 29 is reversed by zigzaggery by inverting units 36.The thin slice S of reversion is delivered in the conveying guiding element in face of register roller 24 by inverting units 36 again.Thin slice S reverses, to form image overleaf by inverting units 36.
Below, the detailed construction of developer 32Y is described.
As shown in Figure 2, developer 32Y has: developer receptacle portion 42, developer roll 40, developer upper cover 43, the 1st stirrer 41A and the 2nd stirrer 41B.
Developer receptacle portion 42 is containers of storage developer DY.Developer DY is the potpourri of carrier and the yellow toner be made up of fine magnetic-substance particle.If developer DY is stirred, so toner frictional electrification.Toner is attached to the surface of carrier.
In the inside in developer receptacle portion 42, configuration the 1st stirrer 41A, the 2nd stirrer 41B.1st stirrer 41A and the 2nd stirrer 41B stirs developer DY.1st stirrer 41A and the 2nd stirrer 41B carries developer DY.
2nd stirrer 41B is configured in the below of developer roll 40.The developer DY being supplied to developer receptacle portion 42 is supplied to the surface of developer roll 40 by the 2nd stirrer 41B.
On the top in developer receptacle portion 42, be configured with developer roll 40 and developer upper cover 43.
As shown in Figure 3, the roller surface of developer roll 40 is relative with photosensitive drums 30.In the position q on the surface of photosensitive drums 30, in the roller surface of developer roll 40 and the spaced apart fixing development space of photosensitive drums 30.Developer roll 40 and photosensitive drums 30 configure abreast.But, in Fig. 3, for the ease of observing, eliminate the diagram of developer DY etc.
Position q is positioned at the central axis of relative photosensitive drums 30, fixing orientation.In present embodiment, as an example, be positioned at relative level face, the position tilted to the lower side.
Developer roll 40 at position q, by the latent electrostatic image developing on the surface of photosensitive drums 30.Below, on the roller surface of developer roll 40, the position relative with position q is called developing location Q.
Developer roll 40 has: development sleeve 40a and magnet 40b.Development sleeve 40a is the cylinder-like part on the roller surface forming developer roll 40.Magnet 40b is configured at the inside of development sleeve 40a.
Development sleeve 40a is connected with the illustrated development motor of omission.Development motor can make development sleeve 40a positive and negative rotation.
Development sleeve 40a rotates forward and refers to, the direction that the sense of rotation when image of the photosensitive drums 30 relative with development sleeve 40a is formed is contrary rotates.Development sleeve 40a reversion refers to, the sense of rotation equidirectional when image of the photosensitive drums 30 relative with development sleeve 40a is formed rotates.
Photosensitive drums 30 illustrates clockwise direction in figure 3 and rotates when image is formed.Therefore, development sleeve 40a, when just (instead) turns, rotates in illustrated (clockwise) direction counterclockwise.
Below, sometimes according to the sense of rotation of development sleeve 40a, the relative position relation of two positions in the circumferencial direction of development sleeve 40a is described.At this moment, be sometimes illustrated as: when selecting in two positions one as reference position, another in two positions is arranged in " upstream side " (" downstream ") of sense of rotation.Or, be sometimes illustrated as: position X is arranged in " upstream side " (" downstream ") of the sense of rotation of position Y.Position Y is the reference position as reference.
About " downstream " and " upstream side ", as to give a definition.
The position being arranged in " downstream " of the reference position of sense of rotation refers to, from the reference position on the surface of development sleeve 40a, when sense of rotation is advanced, arrives the position of not enough circumference half.
The position being arranged in " upstream side " of the reference position of sense of rotation refers to, from the reference position on the surface of development sleeve 40a, when advancing in direction opposite to the direction of rotation, arrives the position of not enough circumference half.
The Distribution of Magnetic Field of magnet 40b can switch.Magnet 40b is distributed by switching field, at developing location Q, carries out erecting and cutting fringe of developer DY.
Developer upper cover 43 covers developer receptacle portion 42 and developer roll 40 from top.
Developer roll 40 exposes near developing location Q.Developer roll 40 exposes from the opening between developer upper cover 43 and developer receptacle portion 42.
Developer 32Y also has: confinement plate 44, the 1st sheet material 46 (sheet material), thin slice holding member 45, the 2nd sheet material 48 and fixed part 47.
When confinement plate 44 is when the rotating forward of development sleeve 40a and towards developing location Q, the thickness of the upper developer DY adhered to of restriction development sleeve 40a.
Confinement plate 44 has the section of L-shaped.Confinement plate 44 is formed after the bending of the end of the Width of rectangular-shaped flat board.Extend the section of the L-shaped of confinement plate 44, make it be longer than the width that can develop of development sleeve 40a.
In the end of the Width of confinement plate 44, do not have bending end relative with development sleeve 40a at restriction site P.Have between fixing gap between the end not having to bend of confinement plate 44 and development sleeve 40a.The upstream side of the developing location Q in sense of rotation when restriction site P is the rotating forward of development sleeve 40a.
In order to carry out suitable development, the end of confinement plate 44 coordinates the thickness corresponding with the amount of the developer DY needed for developing location Q with between the gap between development sleeve 40a.
Confinement plate 44 is towards diametric(al) configuration, and this diametric(al) is towards the center of development sleeve 40a.
Confinement plate 44 is fixed on stationary plane 42a.Stationary plane 42a is formed on the upper end in developer receptacle portion 42.The fixing means of confinement plate 44 is not particularly limited.Such as, confinement plate 44 is fixed on stationary plane 42a by screw locking, bonding, caulking etc.
On confinement plate 44, at the through multiple pilot hole 44a of thickness direction.Multiple pilot hole 44a carries out the location of thin slice holding member 45 described later.Such as, pilot hole 44a is made up of with the elongated hole becoming secondary standard the circular hole becoming primary standard.
In present embodiment, rectangular-shaped synthetic resin thin slice is formed by the 1st sheet material 46 after the pars intermedia of Width bends to U-shaped.The synthetic resin thin slice forming the 1st sheet material 46 is soft, has flexibility.As the 1st sheet material 46, especially preferably material is sheet of polyurethane.
The width of the length direction of the 1st sheet material 46 is longer than the width that can develop of developer roll 40.1st sheet material 46 bends to U-shaped between the 1st end 46A and the 2nd end 46B of Width.1st end 46A is mutually relative with the 2nd end 46B.
Between the 1st end 46A and the 2nd end 46B, form the 1st side surface part 46a (in the side of sheet material), front end return portion 46c and the 2nd side surface part 46b.
1st side surface part 46a and the 2nd side surface part 46b, under the state of nature not having External Force Acting, becomes plane, or the flexure plane of almost plane.
Front end return portion 46c is the flexure plane of roughly semicircle shape (comprising the situation of semicircle).
1st sheet material 46 is relative with the surface of the development sleeve 40a between restriction site P and developing location Q.The front end of the 1st sheet material 46 in relative direction is front end return portion 46c.Any part of 1st sheet material 46 in front abuts with the developer DY on development sleeve 40a.
In present embodiment, the 1st sheet material 46 makes the 1st side surface part 46a towards development sleeve 40a.The relative development sleeve 40a of 1st side surface part 46a of the base end side of the 1st sheet material 46, tilted direction tilt and close.The advance of the sense of rotation when inclination of the 1st side surface part 46a is the rotating forward along with development sleeve 40a, close to the direction of development sleeve 40a.Front end return portion 46c is positioned at: compare the 1st end 46A, the downstream in the sense of rotation during rotating forward of development sleeve 40a.
The front of the 1st sheet material 46, along the inclination of the 1st side surface part 46a, extends to the position of development sleeve 40a wedging.
Therefore, on the 1st sheet material 46 of present embodiment, form the abutting part 46C abutted with developer DY.Abutting part 46C is formed near the front end return portion 46c in the 1st side surface part 46a.
In present embodiment, the relative development sleeve 40a of the 1st side surface part 46a extended from abutting part 46C to the 1st end 46A tilts.The pitch angle of the 1st side surface part 46a extended from abutting part 46C to the 1st end 46A is acute angle.The contact plane of the development sleeve 40a in the position that the 1st side surface part 46a contacts with development sleeve 40a by the measuring method at pitch angle is measured as benchmark.
In 1st sheet material 46, form bend 46D in the front of abutting part 46C.Bend 46D, along with the end from abutting part 46C is towards developing location Q, is separated gradually from developer DY.Bend 46D at least comprises front end return portion 46c.Bend 46D, except comprising front end return portion 46c, also comprises the 1st side surface part 46a of the front of removing abutting part 46C sometimes.
Thin slice holding member 45 keeps the 1st end 46A and the 2nd end 46B of the 1st sheet material 46.If the posture that thin slice holding member 45 can make the 1st sheet material 46 keep for developer roll 40, the optional position of developer 32Y so can be arranged at.In present embodiment, as an example, thin slice holding member is fixed on confinement plate 44.About the fixing means of the thin slice holding member 45 relative to confinement plate 44, be not particularly limited.In present embodiment, as an example, thin slice holding member 45 uses double sticky tape or cementing agent, and bonding is fixed on confinement plate 44.
Thin slice holding member 45 has: fixed part 45d, pilot pin 45a, maintaining part 45c and fixing bolt 45b.
Fixed part 45d is made up of the flat board overlapped on confinement plate 44.Fixed part 45d is overlapping on the plate face on confinement plate 44, has the pilot pin 45a outstanding from plate face.
The magnitude setting of pilot pin 45a is identical with the pilot hole 44a of confinement plate 44.Each pilot pin 45a is chimeric with each pilot hole 44a.Fixed part 45d relative to confinement plate 44 positions by pilot pin 45a.
Maintaining part 45c is made up of flat board.Maintaining part 45c is arranged at the position towards developer roll 40 in fixed part 45d.Maintaining part 45c is towards outstanding between restriction site P and developing location Q.Maintaining part 45c extends to the direction inwardly of Fig. 3.The length in the direction inwardly of Fig. 3 of maintaining part 45c is more than the length of the 1st sheet material 46.
On the surface in the thickness of slab direction of maintaining part 45c, on the surface towards developer roll 40, fix the 1st end 46A of the 1st sheet material 46.The fixing means of the 1st end 46A is not particularly limited.In present embodiment, the 1st end 46A is fixed on maintaining part 45c by double sticky tape 49 bonding.
On the surface in the thickness of slab direction of maintaining part 45c, towards on the surface contrary with developer roll 40, fix the 2nd end 46B of the 1st sheet material 46.The fixing means of the 2nd end 46B is not particularly limited.In present embodiment, the 2nd end 46B, by fixed part 47, clamps and is fixed between maintaining part 45c.
1st end 46A and the 2nd end 46B clamps maintaining part 45c, is separated the plate thickness of maintaining part 45c and keeps.
In maintaining part 45c, on the surface securing the 2nd end 46B, the fixing bolt 45b fixing the 2nd end 46B gives prominence to.Fix bolt 45b in the length direction of maintaining part 45c, multiplely to be formed discretely.
Fixed part 47 be fixed in thin slice holding member 45 towards the plate-shaped member on the surface contrary with confinement plate 44.Fixed part 47 has clamping hole 47a.Clamping hole 47a is chimeric with the fixing bolt 45b of thin slice holding member 45.Fixed part 47, by by chimeric with clamping hole 47a for fixing bolt 45b, overlaps on the surface of thin slice holding member 45.Fixed part 47 is held on being fastened in the 2nd end 46B fixing bolt 45b between maintaining part 45c.
Fixed part 47 is fixed with thin slice holding member 45.Fixed part 47 is not particularly limited with the fixing means of thin slice holding member 45.Such as, fixed part 47 can adopt with the fixing means of thin slice holding member 45 bond, caulking, screw locking etc.
On the surface of fixed part 47, form stationary plane 47b.
Stationary plane 47b is being fixed in the state on confinement plate 44 by thin slice holding member 45, and that on surface with photosensitive drums 30 report to the leadship after accomplishing a task direction parallel with the central shaft of photosensitive drums 30 tilts.Stationary plane 47b, along with the upstream side in the sense of rotation from photosensitive drums 30 is towards position q, tilts at the tilted direction moving closer to photosensitive drums 30.
2nd sheet material 48 is fixed by stationary plane 47b.In present embodiment, the 2nd sheet material 48 is fixed on stationary plane 47b by double sticky tape 50.
2nd sheet material 48 extends from stationary plane 47b towards the surface of photosensitive drums 30.The surface of the leading section of the 2nd sheet material 48 and the photosensitive drums 30 when not forming toner image, or the toner image be formed in photosensitive drums 30 abuts.
2nd sheet material 48 is made up of the film of synthetic resin of Soft Quality.Even if the 2nd sheet material 48 abuts with toner image, be also that the loading not destroying toner image abuts.
At this, the assemble method of the 1st sheet material 46 is described.
Fig. 4 (a), (b), (c) are the mode charts of the assemble method of the sheet material of the image processing system representing embodiment.
As shown in Fig. 4 (a), assembler (omits diagram.Below also identical) use double sticky tape 49 to be pasted onto on maintaining part 45c by the 1st end 46A of the 1st sheet material 46.The paste position of the 1st end 46A is the surface relative with the setting position fixing bolt 45b in maintaining part 45c.Then, turn back in the surface that the 2nd end 46B is defining the maintaining part 45c fixing bolt 45b by assembler.
Then, as shown in Fig. 4 (b), assembler inserts the clamping hole 46d of the 1st sheet material 46 by fixing bolt 45b.2nd end 46B is fastened in and fixes bolt 45b.
Each clamping hole 47a of fixed part 47 coordinates with the fixing bolt 45b of corresponding position by assembler respectively.Fixed part 47 presses to the direction of arrow by assembler.Fixed part 47, by suitable fixing means, is fixed on thin slice holding member 45 (with reference to Fig. 4 (c)) by assembler.
Then, the 2nd sheet material 48 is fixed on stationary plane 47b by double sticky tape 50 by assembler.
So, thin slice holding member 45 secures the 1st sheet material 46, fixed part 47 and the 2nd sheet material 48.
Then, the pilot pin 45a of thin slice holding member 45 is inserted the pilot hole 44a of confinement plate 44 by assembler.In present embodiment, confinement plate 44 is pasted the illustrated double sticky tape of omission.Therefore, thin slice holding member 45 is fixed on confinement plate 44 by omitting illustrated double sticky tape.
Above, the assembling of the 1st sheet material 46 terminates.
Then, act as center with the 1st sheet material 46, the action of image processing system 100 is described.
Fig. 5 (a), (b) are the action specification figure of the image processing system of embodiment.
In image processing system 100, by operation or the external signal of control panel 1, start image and formed.Image information is sent to printer portion 3 after reading duplicating object by scanner portion 2, or be sent to printer portion 3 from outside.
The thin slice S of suitable size is supplied to register roller 24 from thin slice incorporating section 4 by printer portion 3.
Image forming part 25Y, 25M, 25C, 25K, based on the image information of answering with each Color pair, form electrostatic latent image at the photoreceptor layers 30a of each photosensitive drums 30.Each electrostatic latent image develops respectively by developer 32Y, 32M, 32C, 32K.The toner image corresponding with electrostatic latent image is formed on the surface of photosensitive drums 30.
Each toner image is by each transfer roll 33, and primary transfer is to intermediate transfer belt 27.At this moment, transfer time suitably staggers according to the allocation position of image forming part 25Y, 25M, 25C, 25K.Therefore, each toner image, along with the movement of intermediate transfer belt 27, does not produce gamut ground overlapping successively, is delivered to transfer section 28.
The toner image arriving transfer section 28 is secondary transferred and is supplied on the thin slice S of transfer section 28 to from register roller 24.The toner image of secondary transfer printing is fixed on thin slice S by fuser 29.
By transfer section 28, the transfer residual toner be not transferred on thin slice S is transferred band cleaning unit 61 and scrapes off.Intermediate transfer belt 27 can be cleaned with reusing.
In present embodiment, the latent electrostatic image developing that developer 32Y, 32M, 32C, 32K will each photosensitive drums 30 be formed by two-component visualization way.The developing operation of developer 32Y, 32M, 32C, 32K is except using except developer DY, DM, DC, DK develop respectively, and other are all identical.At this, below, about developing operation, be described for developer 32Y.
Rotational speed when developer 32Y is to develop makes the development sleeve 40a of developer roll 40 rotate forward.Developer 32Y carries out developing operation.
In developer receptacle portion 42, the 1st stirrer 41A and the 2nd stirrer 41B rotates.1st stirrer 41A and the 2nd stirrer 41B stirs developer DY.1st stirrer 41A and the 2nd stirrer 41B makes developer DY move.If developer DY is stirred, so, toner frictional electrification.Charged toner electrostatic is adsorbed on carrier.
As shown in Fig. 5 (a), developer DY is supplied to the downside of developer roll 40.
The developer DY of supply is by being formed in the magnetic field on the surface of development sleeve 40a, and carrier is attracted, and thus, is attached on development sleeve 40a.Developer DY, along with the rotating forward of development sleeve 40a, moves towards confinement plate 44.
In scope between the gap of developer DY between the leading section of confinement plate 44 and development sleeve 40a, the downstream of sense of rotation during by rotating forward.Therefore, the downstream of the sense of rotation of developer DY when the rotating forward of confinement plate 44, stratiform turns to fixing thickness.
In present embodiment, on the developer DY between restriction site P and developing location Q, form the abutting part 46C based on the 1st sheet material 46.In abutting part 46C, the part distortion of the 1st side surface part 46a of the 1st sheet material 46.Abutting part 46C followed by the layer surface of the developer DY on a part of development sleeve 40a of the 1st side surface part 46a of the 1st sheet material 46.Abutting part 46C is formed in the length direction of the 1st sheet material 46 on the whole.Therefore, between restriction site P and abutting part 46C, confinement plate 44 and the 1st sheet material 46 cover the layer of developer DY.
When developer DY passes through between the gap of restriction site P, developer DY and confinement plate 44 power friction.Therefore, a part of toner T is separated from carrier and disperses.In addition, the downstream of the confinement plate 44 of the sense of rotation when magnetic pole of development sleeve 40a is arranged in rotating forward, and be the upstream side of developing location Q, at the relative position of magnetic pole, developer DY erects.Therefore, a part of toner T of developer DY is separated from carrier and disperses.
If the toner T dispersed arrives the outside of developer 32Y, so toner T is attached to other device sections, may be formed bring impact to image.
But in present embodiment, even if toner T disperses, toner T is also closed in the space between confinement plate 44 and the 1st sheet material 46.Therefore, it is possible to prevent toner T from dispersing to the outside of developer 32Y.
Along with the rotating forward of development sleeve 40a, the developer DY of stratiform passes through abutting part 46C towards developing location Q.1st sheet material 46 makes sheet of polyurethane bend to U-shaped to be formed.Therefore, the pressing force for developer DY of abutting part 46C is very little.In addition, the upstream side in the sense of rotation when the rotating forward of abutting part 46C, has along with towards upstream side, the inclination that the 1st side surface part 46a is separated gradually.
Even if the 1st sheet material 46 abuts in this wise, the layer of developer DY along abutting part 46C, the downstream in sense of rotation when being smoothly through rotating forward.Therefore, the thickness of developer DY is constant.In addition, toner does not also disperse.
Even if just in case when passing through abutting part 46C, toner disperses, and the 2nd sheet material 48 abuts photosensitive drums 30.Therefore, toner is closed in the space of development sleeve 40a, photosensitive drums 30, the 2nd sheet material 48 and the 1st sheet material 46 encirclement.But, if retain toner in this space, so when upkeep operation, developer 32Y is moved, or the toner container retained easily disperses.
In present embodiment, by the 1st sheet material 46, inhibit toner to disperse, therefore, said circumstances can not occur.
The developer DY moving to developing location Q erects due to the magnetic field of magnet 40b, contacts with photosensitive drums 30.Developing bias is applied to development sleeve 40a.Toner in developer DY is by electrostatic adsorption on the surface of photosensitive drums 30 according to the Potential distribution of the electrostatic latent image in photosensitive drums 30.
So, the electrostatic latent image in photosensitive drums 30 is developed successively.On the surface of photosensitive drums 30, form the toner image based on electrostatic latent image.
In image processing system 100, in order to reduce fixing institute heat requirement, use low melt toner.If continue to carry out image formation, so the temperature of developer 32Y rises, and becomes cooling structure, with the temperature making developer 32Y keep fixing.This is cooled through not shown fan and air channel is carried out.But under the state that temperature rises, if image processing system 100 stops, so, fan stops simultaneously.Due to the stopping of fan, cause not cooling, therefore, the surface of the toner in the developer DY that the confinement plate 44 uprised with temperature contacts easily occurs to soften rear adhesion.If there is the adhesion of toner, sometimes impact is brought on the laminarization of developer DY.
Therefore, in image processing system 100, when having carried out after image formed, making development sleeve 40a reverse rotation on the thin slice S of suitable number.
About the amount of reverse rotation, if can toner adhesion be avoided, be so not particularly limited.In present embodiment, as an example, the anglec of rotation is 90 ° (1/4 circles).
As shown in Fig. 5 (b), if development sleeve 40a reverses, the layer of the developer DY of the upstream side (downstream in sense of rotation during rotating forward) in sense of rotation when so reversing makes abutting part 46C by the downstream in sense of rotation during reversion.
In present embodiment, the 1st sheet material 46 defines the direction from abutting part 46C towards developing location Q, from the bend 46D that developer DY is separated.
Bend 46D, near developer DY, along with from the upstream side in sense of rotation during reversion towards downstream, moves closer to the flexure plane smoothly of development sleeve 40a.
Developer DY arrives abutting part 46C, that is, until the space of abutting part 46C owing to narrowing gradually between bend 46D gap by following space.In addition, in present embodiment, because make thin polyurethane bending tablet, so bend 46D is less for the pressing force of developer DY.
Therefore, even and if diminish between gap between bend 46D, abutting part 46C is also easily out of shape.The downstream of the sense of rotation when layer of developer DY is smoothly through reversion along abutting part 46C.
This result is, when developer DY and bend 46D rubs, toner can not disperse.Even if disperse, because bend 46D extends in the downstream in reverse directions, so toner can be suppressed to disperse just in case locally there is toner during friction.In addition, same with during rotating forward, even if by the 2nd sheet material 48, also can prevent from dispersing to the toner outside developer 32Y.
In present embodiment, because the 1st sheet material 46 has bend 46D, so when reversing, also abut with the surface of developer DY always.Therefore, even if just in case the toner of a part disperses, scrape off magnetic absorption and also can not have an effect in the power of the carrier of development sleeve 40a.Therefore, the carrier of developer DY can not be stripped and disperse.
In addition, the 1st sheet material 46 is when development sleeve 40a reverses, and the sense of rotation of relative development sleeve 40a, abuts inversely.But, in present embodiment, because form bend 46D in leading section, so the 1st sheet material 46 can not bend and be involved in the rotation of development sleeve 40a.
1st sheet material 46 bends to U-shaped.In addition, the 1st end 46A of the 1st sheet material 46 and the 2nd end 46B is fixed on maintaining part 45c.Therefore, even the sheet of polyurethane that the 1st sheet material 46 is thin, the rigidity of opposing from the appropriateness of the pressing force of developer DY also can be had.
Such as, the 1st sheet material 46 is compared when the 2nd end 46B of the 1st sheet material 46 is not fixed, and has higher rigidity.1st sheet material 46 compares the 2nd side surface part 46b and the 2nd end 46B of removal the 1st sheet material 46, when bending to J shape, has higher rigidity.
About the effect of the 1st sheet material 46, compare explanation with comparative example.
Fig. 6 (a), (b) are the action specification figure of the image processing system of comparative example.
As shown in Fig. 6 (a), (b), the developer 132 of comparative example replaces the 1st sheet material 46, the thin slice holding member 45 of developer 32Y, has thin slice 146, thin slice holding member 145.The following description because relevant to the effect of the 1st sheet material 46, so, in the developer 132 of comparative example, fixed part 47, the 2nd sheet material 48 of deletion developer 32Y.In comparative example, other structures are identical with the structure of developer 32Y, image processing system 100.
Thin slice 146 is made up of the film of synthetic resin of flat rectangle.The length on the long limit of thin slice 146 equals the length of the length direction of the 1st sheet material 46.The length of the minor face of thin slice 146 be with from the 1st end 46A in the 1st sheet material 46 to the identical length of the length of abutting part 46C.
Base end part 146b as an end of the Width of thin slice 146 is fixed on thin slice holding member 145.
The base end part 146b of the thin slice 146 on confinement plate 44 fixes by thin slice holding member 145.The pilot pin 147a of thin slice holding member 145 by being formed in the same manner as the pilot pin 45a of thin slice holding member 45, confinement plate 44 is located.Thin slice holding member 145 is fixed on confinement plate 44 in the same manner as thin slice holding member 45.
Identical with the posture of the 1st side surface part 46a of the 1st sheet material 46 based on the maintenance posture of the thin slice 146 of thin slice holding member 145.
Thin slice 146 is outstanding from thin slice holding member 145 towards the development sleeve 40a between restriction site P and developing location Q.Thin slice 146 extends to the position being developed sleeve 40a wedging.In thin slice 146, for base end part 146b, the leading section 146a as the end of the side relative with base end part 146b is arranged in the downstream of forward direction.Thin slice 146, along with from the upstream side in sense of rotation when rotating forward towards downstream, moves closer to development sleeve 40a.
Leading section 146a, with the state bent along the developer DY on development sleeve 40a, abuts with developer DY.
As shown in Fig. 6 (a), when development sleeve 40a rotates forward, the leading section 146a of thin slice 146 abuts with the developer DY by confinement plate 44 laminarization.Thin slice 146 prevents toner from dispersing to the outside of developer 132.
By the toner T that disperses during confinement plate 44 in the same manner as developer 32Y, be closed in space that confinement plate 44, thin slice 146 and development sleeve 40a surround.
On the other hand, as shown in Fig. 6 (b), when development sleeve 40a reverses, the sense of rotation during reversion of the relative development sleeve 40a of leading section 146a of thin slice 146, abuts inversely.
Therefore, in the layer of leading section 146a wedging developer DY.Leading section 146a, along with the reversion of development sleeve 40a, invades the lower floor of developer DY.Developer DY wipes off from the surface of development sleeve 40a by leading section 146a.Therefore, together fall downwards with the toner of the carrier that attached to the developer DY moved to outside the circle of magnetic force.
So, during reversion, the sense of rotation when leading section 146a not forming the thin slice 146 of bend in the front of abutting part reverses relatively, abuts inversely.Therefore, leading section 146a during rotating forward, slides more consumingly compared with developer DY and development sleeve 40a.
This result is, even if there is remaining carrier on the surface of development sleeve 40a, the toner T also easy surface from carrier is separated, and disperses to space.Therefore, even if just in case there is not dispersing of carrier, compare present embodiment, more easily there is dispersing of toner T.
So, in the developer 132 of comparative example, when the reversion of development sleeve 40a, there is dispersing of toner and carrier.
On the other hand, the developer 32Y with the present embodiment of the 1st sheet material 46 is described above, even if when development sleeve 40a reverses, also can suppress to disperse from development sleeve 40a toner externally.
Below, the various variation of present embodiment are described.
In above-mentioned embodiment, describe abutting part 46C and be formed on the 1st side surface part 46a.
But abutting part also can be arranged at the position of the downstream formation bend of the sense of rotation when the rotating forward of abutting part.Such as, abutting part also can be formed in a part of front end return portion 46c.
In above-mentioned embodiment, describe the 1st sheet material 46 and wafer warpage is become U-shaped to be formed.In addition, arrange the 1st side surface part 46a as relative side of the 1st sheet material 46 and the 2nd side surface part 46b almost parallel (comprising parallel situation).
But the curved shape of U-shaped can be under the state of nature of not having an effect in external force, the shape expanded to side.Such as, the 1st sheet material 46 can be the 1st side surface part 46a and the bandy C-shaped of the 2nd side surface part 46b under state of nature.At this moment, the 1st sheet material 46 can the bending collapse of side when abutting part is formed, in U-shaped.
In above-mentioned embodiment, the 1st end 46A and the 2nd end 46B that describe the 1st sheet material 46 are fixed on maintaining part 45c.
But the rigidity of the thin slice that can use according to the 1st sheet material 46, in the 1st sheet material 46, does not fix the 2nd end 46B, can keep the 2nd end 46B movably.
In addition, according to sheet material rigidity, the shape of sheet material can adopt the section eliminating the 2nd side surface part 46b of the 1st sheet material 46 and the J shape of the 2nd end 46B.
In above-mentioned embodiment, describe the 1st sheet material 46 and wafer warpage is become U-shaped.In addition, the 1st end 46A and the 2nd end 46B that describe the 1st sheet material 46 are fixed on maintaining part 45c to be formed.
If become such structure, even if the thin slice that so rigidity is low, by rotating forward, the reversion of development sleeve 40a, the rigidity not occurring to bend and be involved in easily can be realized.
But sheet material forms the shape of the abutting part relative with developer and bend, abut the layer of developer with suitable pressing force.That is, in sheet material, formation bend has not been needed by flex foils.Such as, sheet material can be following parts, that is, be made up of solid elastomeric element, and outside surface is the parts of the such U-shaped of the 1st sheet material 46.
By at least one embodiment described above, by having sheet material, even if can when making developer roll reverse, also the toner from developer roll can be suppressed to disperse, wherein this sheet material has: abutting part, the surface configuration of the developer roll between relative restriction site and developing location, abuts with developer; And bend, along with from abutting part towards developing location, leave gradually from developer.
Although the description of several embodiment of the present utility model, but these embodiments just propose as an example, are not intended to limit scope of the present utility model.For the embodiment that these are new, can implement in other various modes, in the scope not departing from main idea of the present utility model, various omission, displacement can be carried out and change.These embodiments and its distortion, while being contained in scope of the present utility model and main idea, be also contained in the utility model and equivalency range thereof recorded in claims.
Accompanying drawing explanation
Fig. 1 is the profile schema diagram of the one-piece construction example of the image processing system representing embodiment.
Fig. 2 is the profile schema diagram of the image forming part of the image processing system representing embodiment.
Fig. 3 is the enlarged drawing in the A portion in Fig. 2.
Fig. 4 is the mode chart of the assemble method of the sheet material of the image processing system representing embodiment.
Fig. 5 is the action specification figure of the image processing system of embodiment.
Fig. 6 is the action specification figure of the image processing system of comparative example.
Claims (10)
1. an image processing system, possesses:
Photoreceptor, after being exposed, forms electrostatic latent image on its surface;
Developer roll, can positive and negatively rotatably be arranged, during rotating forward, on the surface of developing location by the developer replenishing Zhi described photoreceptor that comprise toner, by described latent electrostatic image developing;
Confinement plate, limits in the thickness of restriction site to the described developer be attached on described developer roll; And
Sheet material, has: abutting part, and the surface configuration of the described developer roll between relatively described restriction site and described developing location, abuts with described developer; And bend, along with from described abutting part towards described developing location, be separated gradually from described developer.
2. image processing system according to claim 1, is characterized in that,
Described sheet material by making the both ends of the Width of thin slice relative, and is fixed separated from each other, is formed with becoming U-shaped by described wafer warpage.
3. image processing system according to claim 2, is characterized in that,
Described thin slice is sheet of polyurethane.
4. image processing system according to claim 1, is characterized in that,
Described bend, in the leading section of the described sheet material towards described developer roll, is formed as U-shaped,
Described abutting part is formed at the side in the side of the described sheet material clipping described bend.
5. image processing system according to claim 2, is characterized in that,
Described bend, in the leading section of the described sheet material towards described developer roll, is formed as U-shaped,
Described abutting part is formed at the side in the side of the described sheet material clipping described bend.
6. image processing system according to claim 3, is characterized in that,
Described bend, in the leading section of the described sheet material towards described developer roll, is formed as U-shaped,
Described abutting part is formed at the side in the side of the described sheet material clipping described bend.
7. image processing system according to claim 1, is characterized in that,
Described sheet material is configured to, and from the connection plane of the relatively described developer roll of the base end part in the direction that described developer roll is separated, acutangulates and tilts.
8. image processing system according to claim 2, is characterized in that,
Described sheet material is configured to, and from the connection plane of the relatively described developer roll of the base end part in the direction that described developer roll is separated, acutangulates and tilts.
9. image processing system according to claim 3, is characterized in that,
Described sheet material is configured to, and from the connection plane of the relatively described developer roll of the base end part in the direction that described developer roll is separated, acutangulates and tilts.
10. image processing system according to claim 4, is characterized in that,
Described sheet material is configured to, and from the connection plane of the relatively described developer roll of the base end part in the direction that described developer roll is separated, acutangulates and tilts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014247265A JP6223320B2 (en) | 2014-12-05 | 2014-12-05 | Image forming apparatus |
| JP2014-247265 | 2014-12-05 |
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| CN204832775U true CN204832775U (en) | 2015-12-02 |
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| CN201520569260.0U Active CN204832775U (en) | 2014-12-05 | 2015-07-31 | Light -emitting -diode array heads positioning method and image forming apparatus |
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| JP (1) | JP6223320B2 (en) |
| CN (1) | CN204832775U (en) |
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| CN110133975A (en) * | 2017-12-18 | 2019-08-16 | 佳能株式会社 | Developing apparatus |
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| JP6650957B2 (en) * | 2017-08-31 | 2020-02-19 | キヤノン株式会社 | Developing cartridge |
| JP6980505B2 (en) * | 2017-12-05 | 2021-12-15 | キヤノン株式会社 | Image forming device |
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| US4742797A (en) * | 1987-06-25 | 1988-05-10 | Xerox Corporation | Tear drop seal |
| JPH0218582A (en) * | 1988-07-06 | 1990-01-22 | Minolta Camera Co Ltd | Developing device |
| JP3283701B2 (en) * | 1994-08-26 | 2002-05-20 | 株式会社リコー | Developing device |
| JP3530092B2 (en) * | 1999-12-22 | 2004-05-24 | シャープ株式会社 | Development device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110133975A (en) * | 2017-12-18 | 2019-08-16 | 佳能株式会社 | Developing apparatus |
| CN110133975B (en) * | 2017-12-18 | 2022-04-15 | 佳能株式会社 | Developing device |
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| JP2016109873A (en) | 2016-06-20 |
| JP6223320B2 (en) | 2017-11-01 |
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