CN204009369U

CN204009369U - Fuser and image processing system

Info

Publication number: CN204009369U
Application number: CN201420403629.6U
Authority: CN
Inventors: 冈田和也
Original assignee: Toshiba Corp; Toshiba TEC Corp
Current assignee: Toshiba Corp; Toshiba TEC Corp
Priority date: 2014-07-21
Filing date: 2014-07-21
Publication date: 2014-12-10
Anticipated expiration: 2024-07-21

Abstract

The utility model provides a kind of can obtain larger impression width fuser and the image processing system that adopts this fuser under less backer roll pressure.A related fuser of embodiment of the present utility model possesses: fixing roller; Backer roll, is oppositely arranged with described fixing roller, and described backer roll further comprises: core, form cylindrical shape, and by metal, formed; Recess, is positioned on described core, is opened in groove on described core outer circumference surface and that extend along the direction of described core axle; And elastic layer, be set on described core, by resilient material, formed described fixing roller and the crimping each other of described backer roll.

Description

Fuser and image processing system

Technical field

The image processing system that embodiment of the present utility model relates to a kind of fuser of using in image processing system and adopts this fuser.

Background technology

Image processing system (MFP:Multi-Functional Peripheral, multi-function peripheral) moves by following steps: image read-out is placed on to see through by scanning and reads original copy on glass, image data generating.Surface at photoreceptor forms toner image, and the toner image on photoreceptor is transferred to middle transfer body.Middle transfer body is transferred to toner image on medium.Transfer printing has the medium of toner image to pass through fuser.Fuser heats when being pressurizeed in the two sides of medium, by toner image photographic fixing to medium.The medium that has passed through fuser is discharged to discharge tray.

Fuser for such image processing system generally includes fixing roller and backer roll.Recording medium after development is during by the fixing roller of described fuser and the contact area of backer roll, by the heating of fixing roller and the pressurization of backer roll, and the fixing not photographic fixing developer of melting.The contact area of fixing roller and backer roll is due to the holding force existing each other, thereby is commonly referred to clamping section.

Existing backer roll generally includes columnar core and is arranged at the elastic layer on the outer peripheral face of core, and wherein core is formed by metals such as aluminium alloy or stainless steels, and elastic layer forms as silicone rubber etc. by having stable on heating elastic caoutchouc.

Yet there is following shortcoming in this structure:, need very large roller plus-pressure in order to obtain impression width, and the heat of elastic layer easily taken away by metal, thereby affect the quality of imaging.

Utility model content

A fuser that embodiment is related of the present utility model, is characterized in that possessing:

Fixing roller; And

Backer roll, is oppositely arranged with described fixing roller, and described backer roll further comprises:

Core, forms cylindrical shape, by metal, is formed;

Recess, is opened in groove on described core outer circumference surface and that extend along the direction of described core axle; And

Elastic layer, is set on described core, by resilient material, formed,

Described fixing roller and the crimping each other of described backer roll.

An image processing system that embodiment is related of the present utility model, is characterized in that possessing:

Image forming part forms image on recording medium; And

Fuser, the backer roll that there is fixing roller and be oppositely arranged with described fixing roller, described backer roll further comprises:

Core, forms cylindrical shape, by metal, is formed;

Elastic layer, is set on described core, by resilient material, formed,

Described fixing roller and the crimping each other of described backer roll.

The utility model is by form recess on core, and recess can make elastic layer under less backer roll pressure, obtain impression width.

Accompanying drawing explanation

Fig. 1 is the sectional view of the image processing system of present embodiment.

Fig. 2 is the structural representation of fuser in Fig. 1;

Fig. 3 is the side view of the backer roll in fuser in Fig. 1;

Fig. 4 is that partial schematic diagram is looked on a left side for the backer roll of Fig. 3.

Embodiment

Below, embodiment of the present utility model is described.

Fig. 1 is the sectional view of the image processing system (MFP) of present embodiment.

As shown in Figure 1, MFP100 comprises image forming part 10, possesses supply unit 11, discharge portion 12 and the scanner section 13 of pick-up roller 34.

Image forming part 10 possesses Y (yellow), M (magenta), these four groups of images of C (cyan), K (black) of along intermediate transfer belt 15, configuring side by side and forms station 16Y, 16M, 16C and 16K.Each image forms station 16Y, 16M, 16C and 16K at the photosensitive drums 17Y along arrow a direction rotation, 17M, 17C and 17K around, possesses charger 18Y, 18M, 18C and 18K, developing apparatus 20Y, 20M, 20C and 20K and photoreceptor clearer 21Y, 21M, 21C and 21K.

Laser explosure device 22 irradiating lasers of image forming part 10, and form electrostatic latent image on each photosensitive drums 17Y, 17M, 17C and 17K.

Backing roll 27 and driven voller 28 support intermediate transfer belt 15, and intermediate transfer belt 15 is advanced along arrow b direction.The primary transfer roller 23Y, 23M, 23C and the 23K that are positioned at intermediate transfer belt 15 inner sides on intermediate transfer belt 15, and overlap on intermediate transfer belt 15 toner image the toner image primary transfer that is formed at each photosensitive drums 17Y, 17M, 17C and 17K.Each photoreceptor clearer 21Y, 21M, 21C and 21K remain in the toner on photosensitive drums 17Y, 17M, 17C and 17K after removing primary transfer.

In being driven in intermediate transfer belt 15 across the intermediate transfer belt 15 locational secondary transfer roller 35 relative with backing roll 27 along arrow c direction rotation.Secondary transfer roller 35 using the toner image on intermediate transfer belt 15 together secondary transfer printing the supply along transport path 36 from supply unit 11 as the thin slice P of recording medium.

Intermediate transfer belt 15, image form station 16Y, 16M, 16C and 16K, laser explosure device 22, primary transfer roller 23Y, 23M, 23C and 23K and secondary transfer roller 35 composing images forming portions.Image forming part 10 possesses fuser 1, distributing roller to 37 along transport path 36 in the downstream of secondary transfer roller 35.

In the situation that starting to print, MFP100 utilizes image forming part 10 to form toner image on thin slice P, by toner image photographic fixing after thin slice P, thin slice P is expelled to discharge portion 12.

Fig. 2 is the structural representation of fuser 1 in Fig. 1.Fuser 1 comprises coil 2, backer roll 3, fixing roller 4.Coil 2 can adopt IH coil, and coil 2, across the axial whole region of fixing roller 4, closes on fixing roller 4 and produces magnetic flux.IH coil is for heating fixing roller 4.

Backer roll 3 is oppositely arranged with fixing roller 4, and crimping each other forms bite N.Backer roll 3 with rotation the driven rotation of fixing roller 4, thereby drive the thin slice P between described backer roll 3 and fixing roller 4 to carry along throughput direction F.Backer roll 3 and fixing roller 4 are preferably across the width W of whole thin slice P.Because backer roll 3 directly contacts with thin slice P, thereby the state of its work has affected the quality of photographic fixing with fixing roller 4.

Fig. 3 is the side view of the backer roll in fuser in Fig. 1; Fig. 4 is that partial schematic diagram is looked on a left side for the backer roll of Fig. 3.As shown in Figure 3,4, backer roll 3 comprises core 31 and is set in the elastic layer 32 on core 31.Core 31 forms cylindrical shape conventionally, guarantees like this uniform force application in rotation process.Core 31 adopts rigid material to make, and rigid material can give elastic layer 32 with enough anchorage forces in inside, to keep shape and the motion trend of backer roll 3 integral body.For example core 31 can be used ironly to reduce costs, or core 31 also can adopt stainless steel material, as preferably also adopting aluminum alloy materials.That is, core 31 can be selected metal material.

Elastic layer 32 adopts elasticity (flexibility) material to make, and resilient material can produce larger deformation under the effect of holding force, thereby makes the medium (thin slice P) between backer roll 3 and fixing roller 4 have larger impression width.Elastic layer 32 preferably adopts elastomeric material, comprises and has stable on heating elastic caoutchouc as formation such as silicone rubbers.Adopt heat resistant rubber can keep the dimensionally stable of elastic layer 32 in fixing, thereby improve the quality of photographic fixing.

As shown in Figure 3, on core 31 external peripheral surfaces, be formed with the air layer 33 that can hold air, by air layer 33 is set, make elastic layer 32 obtain impression width with less roller plus-pressure.

In the present embodiment, as shown in Figure 3, air layer 33 is the outside surface at core 31, the surface contacting with elastic layer 32, a plurality of a certain amount of recesses that are absorbed in 331 of elastic layer 32 that hold that form, this recess 331 is for being opened in the groove 3311 extending along core 31 axial directions on core 31 outer circumference surfaces.

Like this, because elastic layer 32 does not directly contact with core 31 in the part that is positioned at the groove 3311 of recess 331, when backer roll 3 is exerted pressure, elastic layer 32 can be absorbed in a certain amount of in groove 3311, and elastic layer 32 can obtain impression width when applying less roller plus-pressure.Impression width refers to the distance contacting with thin slice P in elastic layer 32 external circumferential simultaneously, thereby wider impression width can impel roller pressure to be applied to equably the upper quality that improves impression of thin slice P as far as possible.

Like this, groove 3311 makes elastic layer 32 reduce with the area that core 31 directly contacts, and accommodate air in groove 3311, because the metal material heat radiation of core 31 is very fast, the air holding can reduce elastic layer 32 to core 31 heat radiations, therefore can improve the stability (heat insulating ability) of the temperature of elastic layer 32, the insulating power in the time of can improving backer roll 3 and contact with thin slice P, thus improve further photographic fixing effect.

In addition, the length of the groove 3311 of recess 331 is preferably greater than elastic layer 32 and thin slice P in the width length axially contact, and in the utility model embodiment, groove 3311 is along the axial whole core 31 of perforation of core 31.Can, so that the whole Width that elastic layer 32 contacts with thin slice P can both keep uniform deformation, improve fixing quality like this.

Enumerated air layer 33 (recess 331) above for being opened in the groove configuration example of core outer surface, but can be also other mode, for example, at the sheathed overcoat with groove structure in the surface of core 31, also can play the stability texts that elastic layer 32 can obtain impression width and improve temperature when applying less roller plus-pressure.

Above, although understand several embodiments of the present utility model, but these embodiments are to propose as an example, are not intended to limit scope of the present utility model.For these new embodiments, can implement with other variety of ways, within not departing from the scope of main idea of the present utility model, can carry out various omissions, displacement and change.These embodiments and its distortion, when being contained in scope of the present utility model and main idea, be also contained in the utility model and impartial scope thereof of recording in claims.

Claims

1. a fuser, is characterized in that, possesses:

Fixing roller; And

Core, forms cylindrical shape, by metal, is formed;

Elastic layer, is set on described core, by resilient material, formed,

Described fixing roller and the crimping each other of described backer roll.

2. fuser as claimed in claim 1, is characterized in that, described recess for to be formed with and can to hold the groove that described elastic layer is absorbed on the outer circumference surface contacting with described elastic layer of described core.

3. fuser as claimed in claim 1, is characterized in that, described elastic forms by having stable on heating elastic caoutchouc.

4. fuser as claimed in claim 1, is characterized in that, the length of described groove is greater than the width of described elastic layer.

5. fuser as claimed in claim 1, is characterized in that, described groove axially connects along described core.

6. an image processing system, is characterized in that, possesses:

Image forming part forms image on recording medium; And

Core, forms cylindrical shape, by metal, is formed;

Elastic layer, is set on described core, by resilient material, formed,

Described fixing roller and the crimping each other of described backer roll.

7. image processing system as claimed in claim 6, is characterized in that, described recess for to be formed with and can to hold the groove that described elastic layer is absorbed on the outer circumference surface contacting with described elastic layer of described core.

8. image processing system as claimed in claim 6, is characterized in that, described elastic forms by having stable on heating elastic caoutchouc.

9. image processing system as claimed in claim 6, is characterized in that, the length of described groove is greater than the width of described elastic layer.

10. image processing system as claimed in claim 6, is characterized in that, described groove axially connects along described core.