CN202193471U - Sheet material feeding part structure of image formation device - Google Patents

Abstract

The utility model discloses a sheet material feeding part structure of an image formation device, which comprises paper boxes, a paper picking roller, two pairs of conveying rollers and a positioning roller, wherein the two pairs of conveying rollers are respectively arranged on two sides of paper; a conveying belt is tightened between each pair of conveying rollers; and the two conveying belts are in press fit with each other. The sheet material feeding part structure of the image formation device has the advantages that paper is conveyed through the two conveyor belts in compression joint instead of the traditional rollers, so that the paper clamping area during conveying is enlarged and the friction force required by the conveying is increased, which eliminates the slipping phenomenon during the paper conveying and ensures the reliability and the stability in paper feeding.

Description

A kind of feeding sheet materials bilge construction of image processing system

Technical field:

The utility model relates to a kind of feeding sheet materials bilge construction of image processing system.

Background technology:

The image processing system of electrofax mode since duplicability and operability excellent, can form high resolution image at an easy rate, so be widely used as duplicator, chopping machine, facsimile apparatus, have the compounding machine of above-mentioned function more than 2 kinds etc.The image processing system of electrofax mode has photosensitive material, Charging system, exposure device, developing apparatus, transfer device, fixing device.Photosensitive material is the parts that are formed with on its surface with the cooresponding electrostatic latent image of graphicinformation.Charging system is the parts that make photosensitive surface charged.Exposure device is the parts that form electrostatic latent image to the photosensitive surface project signal light that is in electriferous state and at photosensitive surface.Developing apparatus is the parts that form the toner picture to the electrostatic latent image supply toner of photosensitive surface and at photosensitive surface.Transfer device is that the toner that forms on the photosensitive surface is looked like to be transferred to the parts with paper (recording medium).Fixing device is to use the parts of the toner picture photographic fixing on paper on the paper.

In order to make paper successfully be sent to each functional device, in image processing system, also be provided with feeding sheet materials portion, this feeding sheet materials portion is made up of carton, pickup roller, conveying roller and registration roller; Totally two of conveying rollers wherein, they are each other to pressing, after paper is taken away by pickup roller in carton; When arriving conveying roller, utilize two pairs of pressure rollers to the pressure effect, the pulling paper continues to forward; Though this paper feeding structure can satisfy the needs of printing at ordinary times basically, the non-constant of reliability is when carrying out paper feeding through two pairs of pressure rollers; Since little with the paper area of contact, transport process caused, and the situation of skidding usually appears in paper; The final quality that influences print image also can be opened because of tearing waste paper with the effect of registration roller sometimes.

Summary of the invention:

The purpose of the utility model is in order to overcome the shortcoming of above-mentioned prior art, a kind of reliable and stable image processing system feeding sheet materials bilge construction of paper that transmits to be provided.

For realizing above-mentioned purpose; The technical scheme that the utility model provides is: a kind of feeding sheet materials bilge construction of image processing system; Include carton, pickup roller, conveying roller and registration roller, described conveying roller is provided with two pairs, is divided into the both sides of paper; Lock ring has load-transfer device between two rollers of every pair of conveying roller, two load-transfer device pressings.

The utility model has the advantages that: adopt tradition roller to change two belt conveyor crimping transmission paper into transmitting paper; Thereby increase the area of holding paper when transmitting; Increase and transmit required friction force, paper is transmitted skidding can not occur, guarantee the reliability and stability of paper feeding.

Description of drawings:

Fig. 1 is the structural representation of the utility model image processing system;

Fig. 2 is the block diagram of the electric formation of the utility model image processing system;

Fig. 3 is the cross-section structure of the utility model fixing device.

The specific embodiment:

Below, describe with reference to the embodiment of accompanying drawing the utility model.Fig. 1 is the scheme drawing that the inside of the image processing system of the fixing device of expression with this embodiment constitutes.Image processing system 100 comprises toner picture formation portion 1, transfer device 2, feeding sheet materials portion 3, fixing device 4, discharge portion 5, image reading unit 6.

Image reading unit 6 comprises document board, light source and CCD (charge coupled cell) imageing sensor.On document board, put as the original copy that duplicates the object of handling.Use the plate-shaped member that constitutes by transparent materials such as clear glasses on the document board.Light illumination puts the original copy in document board.Ccd image sensor converts reflected light to graphicinformation (analog signal) through to from being carried out opto-electronic conversion by the reflected light of the original copy reflected back of light illumination.The control unit of stating behind the graphicinformation quilt of analog signal 7 (Fig. 2 reference) carry out digital signalization, and then storage.

Toner picture formation portion 1 comprises photosensitive drums 11, Charging system 12, light scanning unit 13, developing apparatus 14, developer supply container 15, photosensitive drums cleaner 16, photosensitive material neutralizer 17.

Photosensitive drums 11 is to be supported to the roller shape parts that can be done rotation by not shown drive motor around axis.Photosensitive drums 11 is that the picture that comprises photo sensitive coating and support electrostatic latent image and even toner picture on the surface of this photo sensitive coating supports body.

As photosensitive drums 11, for example can use the constituting of photo sensitive coating that comprises the conductive base that constitutes by aluminium etc. and be formed at this conductive base surface.Can use conductive bases such as cylindric, cylindric, sheet for conductive base, wherein preferably use conductive base cylindraceous.Can enumerate organic photosensitive layer, inorganic photo sensitive coating etc. as photo sensitive coating.

As organic photosensitive layer, can enumerate as the charge generating layer of the resin bed that contains electric charge generation material with as the laminate of the charge transport layer of the resin bed that contains the charge transport material, or in 1 resin bed, contain the resin bed etc. of electric charge generation material and charge transport material.As inorganic photo sensitive coating, can enumerate and contain the resin bed more than a kind or 2 kinds that selects in zinc oxide, selenium, the non-crystalline silicon etc.

Between conductive base and photo sensitive coating, also can there be basalis.In addition, also can be provided for protecting the superficial layer (protective cover) of photo sensitive coating on the surface of photo sensitive coating.

Charging system 12 is to make the parts of photosensitive drums 11 surfaces with the electric charge of polarity that goes up regulation and current potential.Charging system 12 towards the position of photosensitive drums 11 along the length direction setting of photosensitive drums 11.When for the contact electrification mode, Charging system 12 is set to contact with photosensitive drums 11 surfaces.When for the charged mode of noncontact, Charging system 12 is set to and photosensitive drums 11 surface isolation.

As Charging system 12, can use brush type Charging system, roll shape Charging system, corona discharge assembly, ion generating device etc.Brush type Charging system and roll shape Charging system are the Charging systems of contact electrification mode.In the brush type Charging system, there are device that uses brushed and the device that uses Magnetic brush etc.Corona discharge assembly and ion generating device are the Charging systems of non-contact electrification mode.Exist to use in the corona discharge assembly sparking electrode of wire device, use the device of jagged sparking electrode and use the device etc. of needle shaped sparking electrode.

Light scanning unit 13 forms and the cooresponding electrostatic latent image of this graphicinformation on photosensitive drums 11 surfaces to the photosensitive drums that is in electriferous state 11 surface irradiations and the cooresponding laser of graphicinformation that is made up of digital signal.Can use semicondcutor laser unit etc. as light scanning unit 13.

Developing apparatus 14 comprises developer roll, developing trough, agitating roller.Developer roll is in developing trough, to be supported to the roller shape parts that can do rotation around axis.It is outstanding and near photosensitive drums 11 surfaces to foreign side from peristome developing trough, that be formed on the face of photosensitive drums 11 that developer roll is set to its part.

Developer roll is built-in with not shown fixed magnetic pole, supports developer through this fixed magnetic pole on the developer roll surface.Developer roll with developer roll and photosensitive drums 11 near portion (development driving fit portion), with the electrostatic latent image of the developer replenishing that supports, form the toner pictures on photosensitive drums 11 surfaces to photosensitive drums 11 surface.Developer roll is by the opposite sense driven in rotation of court with photosensitive drums 11.Therefore, in development driving fit portion, move with photosensitive drums 11 surfaces in the same direction on the developer roll surface.

Developer roll is connected with not shown power supply, applies vdc (developing voltage) from this power supply thus.Thus, the developer on developer roll surface is successfully supplied to electrostatic latent image.

Developing trough is formed with peristome on the face that faces photosensitive drums 11, be the container-like component with inner space.Developing trough possesses agitating roller in the portion space within it, and the storage developer.As developer, can adopt the normal developer that uses in this field.But the single component developer that developer both only had been made up of toner, 2 component developers that also constitute by toner and carrier.

Agitating roller is to be supported to the helical part that can be driven in rotation around axis in the inner space of developing trough.Agitating roller is peripheral to developing roller surface with the developer replenishing in the developing trough through being driven in rotation.

Developer supply container 15 is that the portion space retains the container-like component of developer within it.Developer supply container 15 according to the consumption situation of the developer in the developing apparatus 14 to the developing trough filling developer.

Photosensitive drums cleaner 16 is devices of after the toner on photosensitive drums 11 surfaces looking like to be transferred on the sheet material, removing and reclaim the developer that remains in photosensitive drums 11 surfaces.

Remove on 17 pairs of surfaces by the photosensitive drums 11 behind the photosensitive drums cleaner 16 recovery developers of photosensitive material neutralizer.Use illumination equipments such as lamp at photosensitive material neutralizer 17.

Transfer device 2 is to be set to be driven to the roller shape parts that can rotate around axis through not shown CD-ROM drive motor.Transfer device 2 and photosensitive drums 11 crimping.Transfer device 2 is called transfer printing driving fit portion with the pressure contact portion of photosensitive drums 11.Transfer device 2 is to be used for the toner on the photosensitive drums 11 being looked like be transferred to the device on the sheet material of being supplied with by feeding sheet materials portion 3 in transfer printing driving fit portion.In addition, the sheet material that has passed through transfer printing driving fit portion is transferred to fixing device 4.

For transfer device 2, for example use the roller shape parts that comprise the metallic axis body and the conductive layer on the surface that covers this metallic axis body.The metallic axis body is for example formed by metals such as corrosion-resistant steels.Conductive layer is formed by elastic body of electric conductivity etc.As the elastic body of electric conductivity, can use in this field form commonly used, for example enumerate ethylene-propylene-diene rubber (EPDM) of comprising conductive agents such as carbon black, foaming EPDM, polyurathamc etc.

Transfer device 2 is connected with not shown high tension supply.Transfer device 2 is applied the charged opposite polarity high potential of toner picture on polarity and the surface that is formed at photosensitive drums 11 from high tension supply.Thus, be formed at the surface that photosensitive drums 11 surperficial toner pictures successfully are transferred to sheet material.

Feeding sheet materials portion 3 comprises carton 31a, 31b, 31c, pickup roller 32, conveying roller 34, registration roller 35.Store sheet material (recording medium) among carton 31a, 31b, the 31c.As sheet material, for example have general cross paper, coated paper, color photocopying special-purpose with paper, OHP with film, postcard etc.Sheets of sizes for example is A4, A3, B5, B4, postcard size etc.

Pickup roller 32 is many ground parts to conveying roller 34 feeding sheets.The sheet material of preserving among the carton 31a is carried by pickup roller 32.The sheet material of preserving among the carton 31b is transferred to conveying roller 34 via a sheet material income mouthful 33a.The sheet material that is stored in carton 31c is through a sheet material income mouthful 33b) or a sheet material income mouthful 33c be transferred to conveying roller 34.

Conveying roller 34 is provided with two pairs, is divided into the both sides of paper, and lock ring has load-transfer device 36, two load-transfer device pressings between two rollers of every pair of conveying roller.Load-transfer device 36 is to registration roller 35 feeding sheets.

Registration roller 35 be mutual crimping a pair of parts be set up.The action that toner on registration roller 35 and the photosensitive drums 11 looks like to be transported to transfer printing driving fit portion is synchronously to this transfer printing driving fit portion feeding sheets.

Fixing device 4 is the devices that make the unfixing toner picture photographic fixing on sheet material on the sheet material.Sheet material is carried to fixing device 4 from transfer device 2, is heated and pressurizes at fixing device 4.Thus, the toner of formation unfixing toner picture is heated and dissolves and photographic fixing on sheet material.The sheet material of toner after as photographic fixing is transferred to discharge portion 5.

Fixing device 4 comprises fixing roller 41, backer roll 42, thermally dependent resistor 44, calorstat 45, heating source 43 (with reference to Fig. 2).The parts that fixing roller 41 is rotated by not shown drive motor.Backer roll 42 is parts of pushing the outer peripheral face of fixing roller 41 with the pressing force of regulation, the driven rotation along with the rotation driving of fixing roller 41.Fixing roller 41 is called as photographic fixing driving fit portion with the abutting part of backer roll 42.Sheet material is heated and pressurization by two rollers 41,42 in photographic fixing driving fit portion.Heating source 43 is arranged on the in-to-in electric heating apparatus of fixing roller 41.Heating source 43 is connected with not shown power supply, and heat fixing roll 41 internally.About fixing roller 41, backer roll 42, and heating source 43, detailed description is done in the back.

Thermally dependent resistor 44 is the sensors that are used to detect the temperature of fixing roller 41.Heating source 43 is heat fixing roll 41 when being lower than setting value by thermally dependent resistor 44 detected temperature, when setting value is above, stops heating.

Calorstat 45 is the devices that are used to detect the unusual intensification of fixing roller 41.When detecting unusual intensification, heating source 43 can stop the heating of fixing roller 41 immediately.Calorstat 45 is arranged on the zone near heating source 43 on the surface of fixing roller 41.

Discharge portion 5 comprises conveying roller 51, distributing roller 52, retention part 53a, 53b, switching gate 54.Sheet material after conveying roller 51 is handled photographic fixing is carried to distributing roller 52 from fixing device 4.Distributing roller 52 will be rejected to retention part 53a or retention part 53b from the sheet material that fixing device 4 transports. Retention part 53a, 53b preserve the sheet material of toner after as photographic fixing.Switch gate 54 and be and be used for confirming that discharge target that distributing roller 52 is discharged sheet materials is which the parts of retention part 53a and retention part 53b.

Fig. 2 is the block diagram that presentation video forms the electric formation of device 100.Image processing system 100 is as shown in Figure 2, comprises control unit 7, test section 8, power supply unit 9, drive division 10.

Test section 8 is the in-to-in sensors everywhere that are disposed at image processing system 100.Contain above-mentioned thermally dependent resistor 44, calorstat 45 etc. in the test section 8.Power supply unit 9 forms each parts supply capability of device 100 to composing images.Comprise in the power supply unit 9 and be used for the power supply of heating source 43 heating etc.Each parts that drive division 10 makes composing images form device 100 drive.Comprise in the drive division 10 and drive CD-ROM drive motor that above-mentioned fixing roller 41 makes it to rotate etc.

Control unit 7 is arranged at the upper side of the inner space of image processing system 100, and each parts that composing images is formed device 100 are controlled.Control unit 7 comprises storage part 71, operational part 72, control part 73.

The graphicinformation that storage part 71 storage receives via the testing result of the various setting values of guidance panel (not shown) input on the top that is disposed at image processing system 100, test section 8, from external device etc.External device is can form or obtain graphicinformation and electric, electronic machine that can be electrically connected with image processing system 100, for example is terminating set (Personal Computer), digital camera, television image reception facilities, video recorder, DVD (Digital Versatile Disc) logger, HDDVD (High-Definition Digital Versatile Disc) logger, Blu-ray Disc logger, facsimile apparatus device, mobile communication terminal etc.In addition, the program of various processing is carried out in storage part 71 storages.Various processing for example are sheet material determination processing, adhesion amount control and treatment, photographic fixing control and treatment etc.

Storage part 71 can use known equipment, and read-only memory (ROM) (ROM), random-access memory (ram), hard disk drive (HDD) etc. are for example arranged.

The various data (various setting values, testing result, graphicinformation etc.) that operational part 72 taking-up storage parts 71 are stored and the program of various processing are carried out various information processings.Control part 73 transmits control signal to the device as the object of controlling according to the result of operational part 72, carries out the action control of device thus.Control part 73 and operational part 72 are computing machines such as central arithmetic processing apparatus (CPU:Central Processing Unit), micro controller system.

The photographic fixing control and treatment of control unit 7 is for example carried out according to following steps.Control part 73, when receiving the input of image formation indication, the power supply of subtend heating source 43 supply capabilities transmits control signal, and transmits control signal to the CD-ROM drive motor that drives fixing roller 41 rotations.Image forms indication, from the guidance panel of image processing system 100, with input such as image processing system 100 bonded assembly external devices.The power supply that receives control signal is to heating source 43 supply capabilities.Thus, heating source 43 heatings are to fixing roller 41 heating.The CD-ROM drive motor that receives control signal makes fixing roller 41 rotations.The rotation that is accompanied by fixing roller 41 drives backer roll 42 driven rotations.In this state, thermally dependent resistor 44 detects the temperature on the surface of fixing roller 41, and this testing result is sent to control unit 7.Operational part 72 judges according to the setting value of storage in the temperature detection result of thermally dependent resistor 44 and the storage part 71 whether the surface temperature of fixing roller 41 reaches setting value.When the surface temperature that is judged as fixing roller 41 reached setting value, each device beginning image that control part 73 control image processing systems 100 are possessed forms to be handled.Thus, the sheet material that has formed the unfixing toner picture is transported to photographic fixing driving fit portion.Control fixing device 4 is treated to the photographic fixing control and treatment like this.

Then, the concrete formation to fixing device 4 describes.Fig. 3 is the figure of the section of schematically illustrated fixing device 4.Particularly, Fig. 3 is the scheme drawing of the section of expression when using face with the axis normal of fixing roller 41 to dissect the middle body of axis direction of fixing roller 41.

Fixing device 4 has fixing roller 41, backer roll 42 and heating source 43.Fixing roller 41 is that rotation can be done in the direction of principal axis both ends that are supported to its rotating shaft, and by the roller shape parts of not shown CD-ROM drive motor (drive division) driven in rotation.Backer roll 42 is that rotation can be done in the direction of principal axis both ends that are supported to its rotating shaft, and the rotation that is driven in fixing roller 41 drives the roller shape parts be rotated.Heating source 43 is to be disposed at the inside of fixing roller 41 and from the parts of the direct heating fixing roller 41 of fixing roller 41, to use the temperature booster of halide torch etc.

In the fixing device 4 of this embodiment, as shown in Figure 3, through with backer roll 42 and fixing roller 41 crimping, make backer roll 42 produce elastic deformation.Utilize this elastic deformation to form the pressure contact portion that two rollers are in contact with one another (photographic fixing driving fit portion).And fixing roller 41 and backer roll 42 be through at pressure contact portion clamping and feeding sheets, makes that the unfixing toner thermosol on the face that contacts a side with fixing roller 41 of sheet material melts, and then photographic fixing on above-mentioned sheet material.

The above only is the preferred embodiment of the utility model, is not the utility model is done any pro forma restriction.Any those of ordinary skill in the art; Do not breaking away under the utility model technical scheme scope situation; All the technology contents of above-mentioned announcement capable of using is made many possible changes and modification to the utility model technical scheme, or is revised as the equivalent embodiment of equivalent variations.So every content that does not break away from the utility model technical scheme, the equivalence of doing according to shape, structure and the principle of the utility model changes, and all should be covered by in the protection domain of the utility model.

Claims (1)

1. the feeding sheet materials bilge construction of an image processing system; Include carton, pickup roller, conveying roller and registration roller, it is characterized in that: described conveying roller is provided with two pairs, is divided into the both sides of paper; Lock ring has load-transfer device between two rollers of every pair of conveying roller, two load-transfer device pressings.

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