CN101226370A - Fixing device and image forming apparatus equipped with the same - Google Patents

Abstract

A fixing device for image forming apparatus includes: a first nip member in a shape of an endless belt and a second nip member that rotates while pressed against the first nip member. A heat source heats at least one of the nip members. A pressure receiver receives pressure applied to the first nip member from the second nip member. A sliding contact has a contact surface that makes sliding contact with an inner surface of an axial end of the first nip member. A supporting mechanism supports the sliding contact to displace the contact surface thereof away from the pressure receiver as the first nip member moves away from the sliding contact along the axial direction. The displacement increases frictional forces between the contact surface and the inner surface of the first nip member, thus suppressing axial displacement of the first nip member from the sliding contact.

Description

Fixing device and the image processing system that possesses this fixing device

Technical field

The present invention relates to the employed fixing devices of image processing system such as duplicating machine, printer, facsimile recorder, and the image processing system with this fixing device.

Background technology

Usually, adopt in the image processing system of electrofax mode, be provided with as looking like to carry out heat/pressure to being formed on toner on the plates, make the toner fusion and being fixed on the fixing device of the means on the plates at duplicating machine etc.As above-mentioned fixing device, well-known is the banded for no reason heater block that possesses by pyrotoxin heating, and is crimped on described heater block, makes the device of the pressure-producing part of the driven rotation of described heater block in rotating drive.Described heater block and described pressure-producing part play a role as hold assembly respectively.That is, the part of two component crimpings constitutes clamping part.If transfer printing has the plates of described toner picture to enter described clamping part, described heater block just heats described toner picture, and described pressure-producing part just looks like to pressurize to this toner, thus, toner as photographic fixing on described plates.

In aforesaid fixing device, because of described heater block is banded (comprising film like) and thin, so this heater block can be heated rapidly to the temperature that toner can fusion.Thus, can reduce after the image processing system energized or and recover user's stand-by period afterwards, improve user's convenience from sleep pattern.And, can be only when image processing system uses to the pyrotoxin supply capability, the temperature of the fixing device when using is lower than temperature in the past, thus, can save the electric power that image processing system consumes.

But, because of described heater block is banded for no reason, when running, occur sometimes from amesiality with the axial center of the direct of travel quadrature of this band, or snakelike situation of advancing.Though the deflection of described heater block or snakelike advancing because of various former thereby generations, but as main cause, can exemplify out, when the axis of heater block hanged down with the parallel degree of the axis of pressure-producing part, the axial clamp pressure of heater block and pressure-producing part was unequal.The axial deflection of described heater block or snakelike advancing, fold, the photographic fixing that becomes plates be bad, carry the chaotic reason that produces stuck phenomenon because of plates.And, bigger displacement or the snakelike end breakage of advancing and might make heater block.

For displacement, snakelike the advancing of the heater block (band) that prevents described fixing device, patent documentation 1 (Jap.P. open communique spy open 2005-157172 number) has been put down in writing a kind of heating arrangement, and it comprises: banded rotor; Guide the guide member of described rotor; Be crimped on the pressure-producing part on the rotor; The heating arrangement of heating rotor; The flange that supports from the two ends of rotor; And support described flange and have the end bracket of part of the part of this flange of butt.Described end bracket is determined the position at the two ends of described rotor by described flange, prevents the axial deflection (with reference to the claim 1 of described citing document, paragraph 0025 etc.) of described rotor thus.

Can tackle the deflection of heater block, snakelike advancing to a certain extent though can infer described flange, but when making heater block when the power of axial deflection is very big, this heater block quilt is very consumingly by being pressed on the described flange, and the end of this heater block may produce breakage as a result.That is, when heater block be exceeded its physical strength defeat to flange the time, it is damaged to prevent that described heater block from producing.And the described damaged life-span that can shorten fixing device.

In addition, above-mentioned shortcoming can occur in the fixing device of described heater block and the exchange of described pressure-producing part too, promptly, in this fixing device, be crimped on roller shape second hold assembly of banded for no reason first hold assembly, be equivalent to the heater block by the pyrotoxin heating, described first hold assembly is a pressure-producing part.

Summary of the invention

The objective of the invention is to: in view of above-mentioned conventional art problem, provide a kind of, by preventing that banded for no reason first hold assembly is to axial deflection or snakelike advancing, guarantee stable fixation performance, thereby and prevent that the breakage of this first hold assembly from can obtain the fixing device of longer life; And, provide a kind of image processing system that photographic fixing is bad and the life-span is long that do not have by adopting described fixing device.

In order to achieve the above object, fixing device of the present invention comprises: Dai Zhuan first hold assembly for no reason; Second hold assembly, rotate with the state that is crimped on first hold assembly, make described first hold assembly with the direction of the rotary middle spindle quadrature of this second hold assembly on driven, and and described first hold assembly between form the clamping part that plates can enter; Pyrotoxin, at least one side who is used to heat described first hold assembly and described second hold assembly; Pressure-containing parts is arranged to contact with the medial surface of described first hold assembly, bears from described second hold assembly to the described first hold assembly applied pressure at described clamping part; Slip parts, have the face that slips that slips with the end of the axial end portion of described first hold assembly that is the direction parallel with the rotary middle spindle of described second hold assembly; And supporting mechanism, support the described parts that slip.Described supporting mechanism supports the described parts that slip, the medial surface at the position of a side opposite with described pressure-containing parts in the axial end portion of the described face that slips that slips parts and described first hold assembly is contacted, and follow described first hold assembly along described axial, make this slip parts and carry out displacement to the direction that this face that slips that slips parts leaves described pressure-containing parts to leaving the displacement that described direction of slipping parts is carried out.Described displacement of slipping parts has increased friction force between the described medial surface that slips face and the described first hold assembly axial end portion and the friction force between this end and the pressure-containing parts, thus, prevent or can suppress described first hold assembly effectively to leaving described displacement of slipping the direction of parts.

Description of drawings

Fig. 1 is the synoptic diagram that the summary of the related image processing system of expression embodiments of the present invention constitutes.

Fig. 2 is a side view of being located at the fixing device of described image processing system.

Fig. 3 is the front section view of described fixing device.

Fig. 4 is the stereographic map of wanting portion of the described fixing device of expression.

Fig. 5 is the front section view of wanting portion of the described fixing device of expression.

Fig. 6 is the front section view of the related fixing device of another embodiment of the present invention.

Fig. 7 is the stereographic map of wanting portion of expression fixing device shown in Figure 6.

Fig. 8 is the front section view of wanting portion of expression fixing device shown in Figure 6.

Fig. 9 is the fragmentary side cross-sectional view of the related fixing device of the embodiment different with Fig. 3 and embodiment shown in Figure 6.

Figure 10 is the fragmentary side cross-sectional view of the related fixing device of the embodiment different with Fig. 3, Fig. 6 and embodiment shown in Figure 9.

Embodiment

Below, with reference to accompanying drawing preferred implementation of the present invention is described.In addition, each key elements such as record structure, configuration in the present embodiment do not limit interest field of the present invention, only are the examples of explanation.

Fig. 1 is the cut-open view of summary model of the image processing system 2 of the electrofax mode full color correspondence of expression with the fixing device 1 in the embodiment of the present invention.

As shown in Figure 1, described image processing system 2 has the outer cover 2a that is box, and described outer cover 2a contains image forming part 10, intermediate transfer portion 20, secondary transfer printing portion 30, plates supply unit 40, plates conveying road 50, fixing device 1 and discharge portion 60 etc.

Described image forming part 10 forms the toner picture according to the view data of input picture formation device 2.Described image forming part 10 is arranged on the upper side position place of image processing system 2 inside, has four image formation unit 10B, 10Y, 10C and the 10M of the image formation unit 10M of image formation unit 10B, the image formation unit 10Y that forms yellow image that forms black image, the image formation unit 10C that forms cyan image and formation magenta color image.Described four image formation units are alignment arrangements in order to the right from the left side of Fig. 1 paper, and image processing system 2 can form the image of full color thus.

As shown in Figure 1, described image formation unit 10B, 10Y, 10C and 10M have photosensitive drums 11, charged roller 12, exposure device 13, developing apparatus 14, primary transfer roller 15 and the drum cleaning roller 16 etc. as image carrier respectively.

Described photosensitive drums 11 has outer peripheral face, and forms electrostatic latent image on described outer peripheral face.And, by supplying with toner T, form the toner picture to described electrostatic latent image.Photosensitive drums 11 is positioned at the central authorities of described each image formation unit.Described photosensitive drums 11 for example is made of the OPC of the drum of aluminum and the positively charged that forms on the outer peripheral face of this drum or the photographic layer of amorphous silicon, and by not shown drive unit with face the counterclockwise rotating drive of predetermined process speed along Fig. 1.

Described charged roller 12 is arranged on the top of photosensitive drums 11, makes the outer peripheral face of described photosensitive drums 11 have the regulation current potential.For charged, while the assigned voltage that described charged roller 12 is accepted to add rotates along the clockwise direction of facing of Fig. 1 with predetermined process speed.

Described exposure device 13 is according to the view data of input picture formation device 2, and the side face irradiates light to the photosensitive drums 11 of passing through charged roller 12 uniform chargeds with the side face of scanning/exposure photosensitive drums 11, forms electrostatic latent image thus on the side face of photosensitive drums 11.Described exposure device 13 is arranged on the top of photosensitive drums 11 among Fig. 1, the position of the left side side of charged roller 12.

Described developing apparatus 14 is by supplying with toner T to the electrostatic latent image that is formed on photosensitive drums 11 side faces, thereby forms the toner picture on the side face of photosensitive drums 11.Described developing apparatus 14 is arranged on the left side side of photosensitive drums 11 among Fig. 1, have with photosensitive drums 11 at a distance of the interval of regulation and relative developer roll 14a.Described developer roll 14a rotates along facing clockwise or counterclockwise of Fig. 1 with predetermined process speed.

Described developing apparatus 14 contains the developer that comprises toner T, and makes described toner T with the current potential of going up regulation.Particularly, the developing apparatus 14 of image formation unit 10B contains the developer that comprises black toner T, the developing apparatus 14 of image formation unit 10Y contains the developer that comprises Yellow toner T, the developing apparatus 14 of image formation unit 10C contains the developer that comprises cyan toner T, and the developing apparatus 14 of image formation unit 10M contains the developer that comprises magenta toner T.And, each developing apparatus 14 has the toner supplying roller 14b that is positioned at described developer roll 14a oblique upper, described toner supplying roller 14b is in order to form the thin layer of toner T on the side face of developer roll 14a, and supplies with an amount of toner T (developer) to developer roll 14a.

Described primary transfer roller 15 is looking like to be transferred on the intermediate transfer belt 24 that tensioning is set up in intermediate transfer portion 20 (aftermentioned) at the toner that forms on the photosensitive drums 11.Particularly, described primary transfer roller 15 is arranged on the below of photosensitive drums 11, by clamping banded for no reason intermediate transfer belt 24 described later with this photosensitive drums 11, be formed for clamping (nip) portion of primary transfer, be driven in described photosensitive drums 11 and intermediate transfer belt 24 simultaneously and rotate along the clockwise direction of facing of Fig. 1.On described primary transfer roller 15, add the assigned voltage that is useful on transfer printing toner picture.

Described drum cleaning roller 16 is arranged on the right-hand of photosensitive drums among Fig. 1, remains in the primary transfer remaining toner on photosensitive drums 11 surfaces and is reclaimed in order suitably to carry out the formation of next toner picture, to remove.Described drum cleaning roller 16 forms cylindric, and its side face is formed by materials such as for example EPDM, counterclockwise is rotated driving with predetermined process speed along facing of Fig. 1.

20 toners that are formed on the photosensitive drums 11 of described intermediate transfer portion look like to be transferred on the plates S.Described intermediate transfer portion 20 is arranged on the position of approximate centre in the described image processing system 2, and have driven roller 21 and two jockey pulleys 22,23 and be hung on intermediate transfer belt 24 on the described roller 21,22,23, and band cleaning device 25.

Described driven roller 21 is arranged on the position of image formation unit 10B below, rotates in order to make intermediate transfer belt 24, accepts the rotating drive power of supplying with from not shown motor.Jockey pulley 22,23 is arranged to make in the described intermediate transfer belt 24 is become linearity by the part of photosensitive drums among described each image formation unit 10B, 10Y, 10C and the 10M 11 and 15 clampings of primary transfer roller.Particularly, jockey pulley 22 is arranged on the more position in left side of photosensitive drums 11 of the image formation unit 10B of the leftmost side among Fig. 1, and jockey pulley 23 is arranged on the position on more right side of the image formation unit 10M of the rightmost side among Fig. 1, and rotates in described position respectively.

Described intermediate transfer belt 24 tensioning frames are located at described driven roller 21, and on described jockey pulley 22,23 and described each primary transfer roller 15, the rotation by described driven roller 21 is driven along the clockwise direction of facing of Fig. 1.As mentioned above, because of the clamping part of described intermediate transfer belt 24 through forming by photosensitive drums 11 and primary transfer roller 15, so the toner picture on the photosensitive drums 11 by adding transfer voltage to primary transfer roller 15 opportunity with regulation, and is transferred on the intermediate transfer belt 24.

Described band cleaning device 25 is used to clean the secondary transfer printing remaining toner that remains in described intermediate transfer belt 24 surfaces and is removed and reclaim, and it is arranged on the left of driven roller 21 and jockey pulley 22 in Fig. 1.

Described secondary transfer printing portion 30 mainly is made of secondary transfer roller 31 and described driven roller 21.Described secondary transfer roller 31 is used to carry out primary transfer is looked like to be transferred to secondary transfer printing on the plates S such as paper to the toner on the intermediate transfer belt 24, by not shown contact separation mechanism, with the opportunity of regulation, be crimped on the position that the outer peripheral face with described driven roller 21 of described intermediate transfer belt 24 contacts.When carrying out described crimping, by transfer voltage being applied on the described secondary transfer roller 31, thereby the toner on the described intermediate transfer belt 24 is looked like to be transferred on the plates S.

Described plates supply unit 40 is supplied with for example plates S such as copy paper, OHP, label paper to secondary transfer printing portion 30.Plates supply unit 40 comprises that box 41, pickup roller 42 and overlapping conveying prevent that roller is to 43.Box 41 is used for many plates S of splendid attire, is the chest shape of opening above.In described box 41, be provided with the mounting plate 44 of many plates S of mounting.Described pickup roller 42 is arranged on the top-right position of box described in Fig. 1 41.

Described plates supply unit 40 carries out the operation of supply plates described below.Described plates supply unit 40 has not shown hoisting gear, and described hoisting gear rises described mounting plate 44, and makes the plates S and the pickup roller butt of the superiors among the plates S that is positioned on the described mounting plate 44.Pickup roller 42 passes out to plates to the described plates S with described pickup roller 42 butts one by one and carries road 50 by rotating drive.Described overlapping conveying prevents that roller is arranged near the of described pickup roller 42 to 43 and is positioned at downstream one side of throughput direction, and rotates respectively to prevent many overlapping the sending of plates S.

Described plates carry road 50 to be used for plates S from plates supply unit 40, pass through secondary transfer printing portion 30 and fixing device 1 and are transported to discharge portion 60.Described plates carry be provided with in the road 50 a plurality of guide member 51, conveying roller to 52, alignment roller is to 53 etc.Alignment roller is to 53 upstream one sides that are arranged on the plates throughput direction of secondary transfer printing portion 30, after the plates S that transports is temporarily stopped, these plates S with the regulation opportunity and speed deliver to secondary transfer printing portion 30, by secondary transfer printing portion 30 at the appropriate location of plates S transfer printing toner picture.

The conveying road of in Fig. 1, representing plates S with dot-and-dash line.

Described fixing device 1 is by looking like to carry out pressurization and to the toner on the plates S to secondary transfer printing, makes the toner T fusion that forms this toner picture and is fixed on the plates S.Detailed content is described in the back.

Described discharge portion 60 is used for the plates S that is formed with image is discharged in image processing system 2, it has escape hole, with the distributing roller that is used for discharging plates S from described escape hole to 61, and be arranged on the top of image processing system 2 and the plates discharge dish 62 of the plates S that is used to accept discharge from described escape hole.The plates S that can mounting on the described plates discharge dish 62 be formed with certain number of image.

Then, the operation that forms image by above-mentioned image processing system 2 is described.

If image forms the signal of beginning and is issued, photosensitive drums 11 just is rotated driving with predetermined process speed, makes positive polarity on the described photosensitive drums 11 even areas by charged roller 12.Then, exposure device 13 converts the picture signal of input to light signal respectively, with the laser scanning and the charged photosensitive drums 11 of exposing, forms electrostatic latent image thus on photosensitive drums 11.

On the other hand, the development bias voltage identical with 11 charged polarity of photosensitive drums (positive polarity) is applied on the developing apparatus 14, described developing apparatus 14 supplies to described electrostatic latent image to toner T, thereby makes this electrostatic image become visual image as the toner picture.The primary transfer portion of described toner picture between photosensitive drums 11 and transfer roll, by being applied with the transfer roll of primary transfer bias voltage (opposite with toner T polarity (negative polarity)), primary transfer is to the intermediate transfer belt 24 that rotates in (moving).

When forming coloured image, by processing same as described above, at first image formation unit 10B the toner of black as primary transfer to intermediate transfer belt 24.The part of having carried out above-mentioned transfer printing in the intermediate transfer belt 24 moves to next image formation unit 10Y, and described image formation unit 10Y looks like yellow toner to overlap onto on the described black toner picture.Similarly,, overlapping respectively pinkish red toner picture at image formation unit 10C at image forming part 10M the toner picture of cyan.Thus, only, can form the toner picture of full color by to the primary transfer of intermediate transfer belt 24 and the rotating drive of this intermediate transfer belt 24.

Overlap the toner picture on the described intermediate transfer belt 24, at secondary transfer printing portion 30 secondary transfer printings to the plates S2 that is transported 53 corresponding opportunitys by alignment roller.Described plates S is transported to fixing device 1, after looking like to be melted at the toner on these plates S, fixing, discharges by discharge portion 60.

Then, describe the structure of the fixing device 1 in the embodiments of the present invention in detail with reference to Fig. 2～Fig. 4.

Fig. 2 is the side cutaway view of the brief configuration of the described fixing device 1 of expression.Described fixing device 1 comprises at least: the heater block 72 that is equivalent to first hold assembly; Pyrotoxin 77; The pressure-producing part 73 that is equivalent to second hold assembly; Pressure-containing parts 74; According to circumstances also can comprise strengthening part 75.Described heater block 72 and described pressure-producing part 73 are formed with clamping part N between the two, to entering and carrying out photographic fixing by the toner T on the plates S of described clamping part N.

Described heater block 72 is by described pyrotoxin 77 heating.Described heater block 72 is formed banded for no reason by for example metallic thin slice that forms thin-walled, form cylindric in this embodiment.The thickness of described heater block 72 comparatively it is desirable to about 30 μ m, but is not limited to 30 μ m.This thickness can suitably change according to the thickness of the plates S of the material of heater block 72, photographic fixing etc., for example, and also can be suitably selected in 20～100 mu m ranges.

Described heater block 72 is considered thermal capacity, intensity, thermotolerance, wearing quality etc., for example, can be formed by SUS (stainless steel).The heater block 72 of this embodiment for example is that the stainless steel foil of 30 μ m constitutes by thickness.The material of described heater block 72 is not limited to metal, for example also can be resins such as polyimide.And, also can be on the surface of heater block 72 (side face) with the release layer of formation raising release properties such as fluororesin.Described release layer can prevent, because of the cohesiveness of the toner T that goes up fusion/fixing through the plates S of described clamping part N attaches on the heater block 72 plates S, the obstruction that the fold that produces on these plates S, or plates S thus takes place in fixing device 1 etc.

Described heater block 72 for example can have the diameter about 30mm, is the following small parts of 20mm but this heater block 72 also can be a diameter, can also be that diameter is the above large component of 40mm on the contrary.That is, the diameter of described heater block 72 can suitably be set according to the size of fixing device 1.

The width of described heater block 72, that is, heater block 72 length of (direction vertical with the paper of Fig. 2) on the direction with respect to plates throughput direction quadrature is corresponding to the longitudinal size of A4 with paper.But described length also can suitably be set according to the size of the plates S that uses in fixing device 1, image processing system 2.

In this embodiment, described pyrotoxin 77 is arranged on the inboard of described heater block 72, along extending axially of heater block 72, is separately positioned on two places across strengthening part 75.Described heating source 77 heater block 72 be heated to can the fusion toner temperature.Described pyrotoxin 77 for example, can use radioactive pyrotoxins such as Halogen lamp LED, but be not limited to Halogen lamp LED, also can use the known pyrotoxin that can heat heater block 72.In addition, pyrotoxin 77 also can be an odd number.

When the pyrotoxin 77 of present embodiment uses Halogen lamp LED, a side can be set at for example 500W, the opposing party is set at 600W, make pyrotoxin have the power that adds up to about 1100W.The power of two pyrotoxins 77 can be different like that as mentioned above, also can be identical each other.Described performance number is not limited to 500W or 600W, can suitably change according to the specification of fixing device 1.

In addition, two pyrotoxins 77 can not worked always simultaneously.By controlling, for example, make two to work simultaneously when needing Fast Heating heater block 72, be in when carrying out continuous photographic fixing under the abundant heated state at heater block 72, for the temperature of keeping heater block 72 can only make a job in complementary ground when starting at image processing system.Described control can make the temperature of heater block 72 be in suitable temperature, can save electric power simultaneously.

Aforesaid heating source 77 is heated to needed about 200 ℃ of fusion toner T apace to the heater block 72 that forms thin-walled.

The roller main body that described pressure-producing part 73 has roll shaft 73a and is provided with around it, the two ends of described roll shaft 73a are supported rotationally by outer cover 2a etc., thus, described roller body supports with the position of described heater block 72 crimping.The roll shaft 73a of described pressure-producing part 73 driving mechanism not shown with comprising motor, gear etc. is connected, the described pressure-producing part 73 of described driving mechanism rotating drive, and heater block 72 is and then rotated.

Particularly, the roller main body of described pressure-producing part 73 is for example formed cylindric by elastomeric materials such as silica gel, with described heater block 72 crimping, and forms clamping part N between this heater block 72.72 couples of plates S by described clamping part N of described heater block heat, and described pressure-producing part 73 pressurizes.Thus, will be positioned in toner T fusion on the described plates S and photographic fixing on plates S.

As shown in Figure 3 and Figure 4, in this embodiment, pressure-producing part 73 and the size direction of rotating axially parallel, promptly with the axially parallel of described heater block 72 and with the size of the direction (direction vertical) of described plates throughput direction quadrature with the paper of Fig. 2, corresponding to the longitudinal size of A4, longer slightly than the axial dimension of heater block 72 with paper.Described size can make pressure-producing part 73 and the gamut of the clamping part N of 72 of heater blocks in exert pressure effectively and make the photographic fixing pressure stability.But each size of described pressure-producing part 73 can suitably be set according to the size of the plates S that uses in the size of fixing device 1, the image processing system 2.

The clamping part N of described pressure-containing parts 74 between described heater block 72 and described pressure-producing part 73 born from described pressure-producing part 73 to described heater block 72 applied pressures, described heater block 72 axially, extend on the promptly parallel direction with the rotation axis of described pressure-producing part 73, as shown in Figure 2, it is arranged on the inboard of heater block 72, and with this heater block 72 in contact with the medial surface of the part of described pressure-producing part 73 crimping.In other words, described pressure-containing parts 74 Jie form clamping part N by described heater block 72 with pressure-producing part 73.

Described pressure-containing parts 74 needs the intensity of bearing described pressure.Described pressure-containing parts 74 can be that SUS (stainless steel) plate about 0.1mm forms by for example thickness.But thickness is not limited to described thickness, can suitably change corresponding to the power of the pressure at clamping part N place.Therefore described pressure-containing parts 74 comparatively it is desirable to not only have thermal capacity, intensity, thermotolerance etc. preferably owing to slip with heater block 72, also has abrasion performance preferably.In satisfying the scope of this condition, also can form described pressure-containing parts 74 with resin.The aforesaid pressure-containing parts 74 that forms with the SUS plate about 0.1mm, because of its thermal capacity less, so do not hinder the intensification of heater block 72.

The concrete shape of pressure-containing parts 74 is unrestricted, and the side view of the pressure-containing parts 74 that present embodiment is related is the roughly C shape of opening upward.Particularly, described pressure-containing parts 74 has the horizontal contact section 74a that contacts with described heater block 72 medial surfaces, in the front and back of described contact site 74a to the upright sidepiece 74b of vertical direction, with the relay 74c of heeling condition between described sidepiece 74b and described contact site 74a, these parts form one.Such shape makes the slip between pressure-containing parts 74 and the heater block 72 smooth and easy.

Described strengthening part 75 bears from the pressure-containing parts 74 of the pressure of described pressure-producing part 73 for auxiliary, reinforcement and establishes.In the present embodiment, as shown in Figure 2, this strengthening part 75 has the side view of the shape of falling T, with the direction of the axially parallel of described heater block 72 on extend, be fixed on and the position of described pressure-containing parts 73 from upper side abuts.By additional described strengthening part 75, pressure (photographic fixing pressure) that can stable holding portion N place, and can make this pressure be higher than in the past pressure, and can be applied to pressure through on the plates S of clamping part N effectively thus, bad with the elimination photographic fixing.

Fig. 3 is a cut-open view of observing described fixing device 1 from the length direction of heater block 72, and Fig. 4 is near the amplification stereogram at the position of the axial end portion of wanting portion that is described heater block 72 of the described fixing device 1 of expression.For the facility on illustrating, omitted the diagram of strengthening part 75 and pyrotoxin 77 among described Fig. 3, Fig. 4 and Fig. 5.

Described fixing device 1 has framework 71 as shown in Figure 3 and Figure 4.Described framework 71 with axially that is on the direction parallel the extending of heater block 72 with the rotation direction of pressure-producing part 73, except supporting described heater block 72 and described pressure-containing parts 74, also support and described laterly a pair ofly slip parts 80,81 and support portion 82 and as the elastomeric element 83 that presses portion etc.

Described framework 71 has main wall 71a and pair of sidewalls 71b, the 71c that is made of rectangular slab.Each sidewall 71b, 71c compare with the axial two ends of described heater block 72 and are positioned at the outside.Described main wall 71a compares with described heater block 72 and is positioned at upper side position, promptly is positioned at the position of an opposite side with described clamping part N across this heater block 72, connects the upper end of described sidewall 71b, 71c.Each sidewall 71b, 71c have the main part of extending to vertical direction, and having the front shape of the shape of falling L from the upper end of described main part to the axial inboard junction surface of extending of described heater block 72, described each junction surface is bonded on the downside of end of the length direction of described main wall 71a respectively.

Described two sidewall 71b, 71c support the both ends of the length direction of described pressure-containing parts 74.Particularly, each sidewall 71b, 71c are provided with through hole 71d (for example vertical oblong through hole), and insert respectively among the described through hole 71d end of described pressure-containing parts 74 length directions.And, not shown component for fixing is installed on the described end, thereby pressure-containing parts 74 is fixed on the framework 71 firmly.

Secondly, with reference to Fig. 5 described parts 80,81 and the supporting mechanism thereof of slipping is described.Fig. 5 is the axial both ends of the described heater block 72 of expression and near the amplification view of structure thereof.

The described parts 80,81 that slip are in order to limit described heater block 72 from its regular position displacement axially, and contact with the axial end portion of this heater block 72 respectively, and have the face that slips 80a, 81a that the medial surface with this end slips respectively.Described support portion 82 and described elastomeric element 83 slip parts 80,81 at each and are provided with, and are configured for supporting the described supporting mechanism that slips parts 80,81.Described supporting mechanism, so that contacting the axial end portion of described heater block 72 state of medial surface at the position (position, upper end in the legend) of a side opposite with described pressure-containing parts 74 from the below, the described face that slips 80a, 81a that each slips parts 80,81 support the described parts 80,81 that slip, and follow described heater block 72 along it axially to leaving the displacement that described direction of slipping any one party of parts 80,81 is carried out, carry out displacement and make this slip parts to the direction that this face that slips that slips parts leaves described pressure-containing parts.

The described parts 80,81 that slip are for example formed by resin etc., have the section shape (from the section shape of observing with the direction of the axial quadrature of heater block 72) of roughly L shape as shown in Figure 3.Each slips the face that slips 80a, the 81a of parts 80,81, it is the surface level that can contact from the below respectively with the medial surface of the axial end portion of described heater block 72, the described parts 80,81 that slip, the axial outside and described face 80a, the 81a adjoining position of slipping at described heater block 72 have restriction face 80b, 81b respectively.Described restriction face 80b, 81b are upwards upright from the described height and position that slips face 80a, 81a along vertical direction, can with the axial end butt of described heater block 72.This butt can limit the axial displacement of described heater block 72 more effectively.

As shown in Figure 5, described each support portion 82 has: lateral wall 84, compare the axial outside that is positioned at described heater block 72 with the corresponding parts 80 (or 81) that slip; From one-tenth a pair of first guiding wall 85 and second guiding wall 86 of described lateral wall 84 to described heater block 72 extensions.In the present embodiment, each support portion 82 is made of for example sheet material such as metal or resin, and this sheet material has the shape in the suitable position bending.

Described lateral wall 84 extends along vertical direction, and described first guiding wall 85 and described second guiding wall 86 extend to heater block 72 from the lower end and the upper end of described lateral wall 84 respectively.The end that is positioned at heater block one side of described first guiding wall 85 constitutes the acclivitous first guide portion 85a.The upper side of the described first guide portion 85a is the guide surface that tilts to same direction, and described lower end of slipping parts 80,81 is formed with the face that is directed 80d, the 81d to the direction inclination parallel with this guide surface, can slip with described guide surface.Equally, the end that is positioned at heater block one side of described second guiding wall 86 also constitutes the acclivitous second guide portion 86a, the downside of the described second guide portion 86a is the guide surface that tilts to same direction, described upper end of slipping parts 80,81 is formed with the face that is directed 80e, the 81e to the direction inclination parallel with this guide surface, can slip with described guide surface.

Promptly, the first guide portion 85a of described first guiding wall 85 has from slipping the side (downside) that parts 80,81 compare near described pressure-containing parts 74 and slip the guide surface that parts 80,81 contact with this with described, and the second guide portion 86a of described second guiding wall 86 has from a side (upside) opposite with described pressure-containing parts 74 and slips the guide surface that parts 80,81 contact with described.And described first guiding wall 85 and second guiding wall 86 slip parts 80,81 from clamping is described up and down respectively, and carry out guiding as described later.

Described elastomeric element 83 slips between parts 80,81 and the lateral wall 84 in the described support portion 82 in the outside between described with elastic compression.Particularly, an end of this elastomeric element 83 is fixed on the medial surface of described lateral wall 84, and the other end is crimped on the described lateral surface (with the face of heater block 72 opposite sides) that slips parts 80,81.Even the elastic force of described elastomeric element 83 make this slip parts 80,81 to the inside the direction restriction face 80b, the 81b that slip parts 80,81 press to direction with the axial end butt of described heater block 72.In other words, each elastomeric element 83 slips parts 80,81 so that parts 80,81 states from axial sandwich heater block 72 that slip of both sides press.

In addition, in Fig. 3～Fig. 5, represented compression helical spring as elastomeric element 83, as long as but have to press and slip parts 80,81 functions, it is not limited to spring.In addition, also can omit the lateral wall 84 of described support portion 82 and elastomeric element 83 is directly installed on framework 71 sides.

In described fixing device 1, because described pressure-containing parts 74 and described pressure-producing part 73 are clamped described heater block 72 from above-below direction, and the medial surface at the position opposite with described pressure-containing parts 74 in two face that slips 80a, 81a that slip parts 80,81 and the described heater block 72 contacts, so Dai Zhuan heater block 72 tensioning frames are located at and slip between parts 80,81 and the pressure-containing parts 74 for no reason.

The following describes the running of described fixing device 1.

Described heater block 72 and since be by thin slice etc. constitute banded for no reason, therefore when driving, its sometimes to its axial lateral deviation to, or snakelike sometimes advancing.Above-mentioned deflection or snakelike advancing are bad with the depth of parallelism of the axis of pressure-producing part 73 by heater block 72, or various factors such as plates S thickness by clamping part N produce.The deflection of heater block 72 as described above, snakelike advancing become the bad reason of photographic fixing, and cause that plates S produces fold, or cause the stuck phenomenon of plates S because of the throughput direction that confuses plates S.And, when the excessive deflection of heater block 72, particularly heater block 72 are thin-walled laminar, the end breakage of this heater block 72 might be caused, thereby this heater block 72 must be changed.But, in described fixing device 1, cause the deflection or snakelike the advancing of the heater block 72 of problem as described above as following, to be prevented or to be suppressed effectively.

For example, suppose described heater block 72 shown in the arrow A of Fig. 5 like that, begin to move to ground to its axial side's parts 81 lateral deviations of slipping.At this moment, the end of an opposite side of heater block 72, direction to the restriction face 80b that slips parts 80 that leaves an opposite side is carried out displacement, the described parts 80 that slip are owing to being pressed against to described heater block 72 1 sides by elastomeric element 83, therefore it follows the displacement of described end, and to same direction displacement, with the butt of the axial end of keeping described restriction face 80b and described heater block 72.

But, because described first guide portion 85a and the second guide portion 86a of parts 80 by described support portion 82 that slip is directed obliquely upward, promptly, be directed to along with the sense of displacement (direction among Fig. 5 shown in the arrow B) that leaves pressure-containing parts 74 near heater block 72, its result, the described parts 80 that slip are followed the displacement of described heater block 72 to the arrow A direction, to the direction of leaving described pressure-containing parts 74, in other words, direction from described heater block 72 ends to this face that slips 80a that slips parts 80 that mention is carried out displacement.

Described displacement of slipping face 80a has increased this and has slipped the friction force that produces between face 80a and heater block 72 medial surfaces.The friction force of this increase, opposing make the power of described heater block 72 along described arrow A direction deflection, and performance suppresses the braking action of described heater block 72 displacements.And, slip the displacement of face 80a to the direction of leaving described pressure-containing parts 74, also increased the friction force between the downside of the medial surface of described heater block 72 and pressure-containing parts 74, the friction force of this increase, opposing makes the power of described heater block 72 along described arrow A direction deflection similarly, and performance suppresses the braking action of described heater block 72 displacements.These friction force, even a bigger power is being arranged to the directive effect of described arrow A during in heater block 72, also can suppress effectively this heater block 72 shown in sharply moving on the direction.

In addition, the increase of described two friction force can make the velocity of rotation of the end that is positioned at the heater block 72 that slips parts 80 1 sides, is lower than the velocity of rotation of the end of an opposite side, and rotary speed difference between the two helps the correction of the axial location of heater block 72.Promptly, the gait of march that is positioned at the described heater block 72 that slips parts 81 1 sides is faster than being positioned at described gait of march of slipping the heater block 72 of parts 80 1 sides, make described parts 80 1 sides of slipping of direct of travel deflection of described heater block 72 thus, its result, heater block 72 is displaced to original position.This effect helps to clear up rapidly the deflection of heater block 72, snakelike abnormal conditions such as advance, and prevents the breakage of heater block 72.

Promptly, even there is one to make described heater block 72 act on this heater block 72 to the big external force that it axially produces displacement, support the described supporting mechanism that slips parts 80,81 also can carry out displacement and described heater block 72 is returned to regular position by making this slip parts 80,81, prevent or suppress effectively the deflection of heater block 72, snakelike advancing, its result, the breakage (particularly strap end portion) of heater block 72 ends that framework that can prevent to be pressed to fixing device 1 by very big trying hard to recommend because of heater block 72 etc. causes.Therefore, just can provide heater block 72 the long term can be not damaged long-life fixing device 1, in addition, can also provide convenience height, long image processing system 2 of 1 life-span of fixing device with stable fixation performance, user.

The structure of the fixing device 1 of another embodiment of the present invention then, is described with reference to Fig. 6～Fig. 8.At this, because identical with shown in Fig. 1～Fig. 5 of framework shown below 71, heater block 72, pressure-producing part 73, pressure-containing parts 74 and strengthening part 75, so represent with same Reference numeral, and omit its explanation.

Though the fixing device 1 of the fixing device 1 of Fig. 6～shown in Figure 8 and Fig. 3～shown in Figure 5 is the same to possess the parts of slipping 80,81, the shape of slipping parts 80,81 of these concrete shapes of slipping parts 80,81 and described Fig. 3～shown in Figure 5 is different.In addition, be provided with swing part 90 as being used to support these supporting mechanisms that slip parts 80,81.

The described fixing device 1 that slips parts 80,81 and Fig. 3～shown in Figure 5 is the same; be arranged on the both ends of heater block 72; as shown in Figure 8; have and be the section shape of L shape roughly (from the section shape of observing with the direction of the axial quadrature of heater block 72); and the face that slips 80a, 81a with level; and slip face 80a, 81a adjoining position place in the axial outside of described heater block 72 and this, have and slip very much face 80c, 81c.

Described each slips face 80c, 81c very much, be described heater block 72 from regular position that is from the medial surface of its axial end portion with slip position that face 80a, 81a slip to this axial displacement very the time, the face that contacts with the medial surface of this end.Particularly, described each slip very much face 80c, 81c and adjacency described to slip face 80a, 81a mutually continuous, to along with the direction (direction that makes progress among the figure) of leaving described pressure-containing parts along described axially the leaving this heater block of heater block 72 tilts.

Described swing part 90 is for example become bar-shaped or tabular by metal or resin-shaped, with the direction of described heater block 72 axially parallels on extend, be arranged on the position between the main wall 71a of described heater block 72 and described framework 71.And the length direction pars intermedia of described swing part 90 is that the center can be rotated around the axle with the axial quadrature of described heater block 72 and is supported on the described main wall 71a with fulcrum 92.Particularly, installing plate 94 is sagging downwards from the downside of described main wall 71a length direction central part, this installing plate 94 by with the pin of described heater block 72 axial orthogonal directionss, the middle part of the described swing part 90 of rotational support.

Describedly slip the both ends that parts 80,81 are fixed on the length direction of described swing part 90.Therefore, shaking of described swing part 90, allow described each slip parts 80,81 the displacement of above-below direction, promptly near or away from the displacement of the direction of described pressure-containing parts 74, make the described interlock between the parts 80,81 of slipping simultaneously, so that described parts 80, the 81 mutual upstream shifts that slip.

Describedly slip the mode that parts 80,81 are installed in two ends of described swing part 90 various changes can be arranged.Describedly slip the end that parts 80,81 can be completely fixed in swing part 90 by secure component etc., projection that also can be by being arranged on swing part 90 sides be arranged on the chimeric of the hole of slipping parts 80,81 sides, this is slipped parts 80,81 is mounted to respect to swing part 90 and can has a little to relatively rotate.In the embodiment of Fig. 6～shown in Figure 8, the top of slipping parts 80,81 is fixed on this swing part 90 by the axle 96 that runs through this top and swing part 90.

At the both ends of described swing part 90, this swing part 90 and each slip parts 80,81 and form the handle part 87 of opening to the inside.Two slip parts 80,81 folds described heater block 72 from axial both sides, and under the medial surface state of contact of the axial end portion of the described face that slips 80a, the 81a that slips parts 80,81 and this heater block 72, supports this heater block 72.

In addition, the position of the fulcrum 92 of described swing part 90, the distance that comparatively it is desirable to slip from this fulcrum 92 to two parts 80,81 equates.The displacement that slips parts 80,81 of interlock equates like this, mutually.

The running of described fixing device 1 then, is described.

For example, suppose described heater block 72 shown in Fig. 8 arrow A like that to its axial side that is slip parts 81 1 lateral deviations and begin to move to ground.At this moment, the adjacent face that slips very much 81c is gone up more from the face that the slips 81a that should contact usually in the described end of slipping parts 81 sides of this heater block 72.Because of this slips face 81c to tilting along with leaving described the rise direction of (promptly leaving pressure-containing parts 74) of face 81a of slipping very much; so slip very much face 81c along with the end of heater block 72 enters, put on the pressure that slips very much face 81c from this heater block 72 and rise.This pressure is followed shaking of swing part 90, as as described in the arrow B, depress and slip parts 81 (promptly, make it to pressure-containing parts 74 1 side displacements), what the shaking of this swing part 90 made an opposite side as shown by arrow C like that slips parts 80 rise (that is, making it to the direction displacement away from pressure-containing parts 74).

Described displacement of slipping parts 80, same with the displacement of slipping parts 80 in the fixing device shown in Fig. 3～Fig. 51, make it slip between face 80a and the described heater block 72 friction force that produces and increase, the friction force opposing of this increase makes described heater block 72 bring into play the braking action that suppresses these heater block 72 displacements along the power of described arrow A direction deflection.And, slip face 80a to the displacement of leaving described pressure-containing parts 74 directions, the medial surface of described heater block 72 and the friction force between pressure-containing parts 74 downsides have also been increased, the friction force of this increase, also opposing makes described heater block 72 bring into play the braking action that suppresses these heater block 72 displacements along the power of described arrow A direction deflection.These friction force are even there is being a bigger power during in described heater block 72, also can suppress described heater block 72 sharply moving on described direction to the directive effect of described arrow A effectively.

In addition, same with the fixing device 1 shown in above-mentioned Fig. 3～Fig. 5, the increase of described two friction force, can make the velocity of rotation that is positioned at heater block 72 ends of slipping parts 80 1 sides, be lower than the velocity of rotation of an opposite side end, rotary speed difference between the two helps the correction of the axial location of heater block 72.That is, described rotary speed difference helps to clear up rapidly the deflection of heater block 72, snakelike abnormal conditions such as advance, and prevents the breakage of heater block 72.

Promptly, in the fixing device 1 of Fig. 6～shown in Figure 8, same with the fixing device 1 of Fig. 3～shown in Figure 5, owing to can prevent or suppress effectively the deflection of heater block 72, snakelike advance etc., therefore can prevent to be pressed to by very big trying hard to recommend the breakage (particularly strap end portion) of the heater block end that the framework etc. of described fixing device 1 causes because of heater block 72.Therefore, just can provide heater block 72 the long term can be not damaged long-life fixing device 1, in addition, can also provide convenience height, long image processing system 2 of 1 life-span of fixing device with stable fixation performance, user.

And; described face 80c, the 81c of slipping very much; owing to tilting along with leaving the direction that the common face that slips 80a, 81a leave pressure-containing parts 74; therefore when the external force that put on heater block 72 hour, described inclination of slipping very much face 80c, 81c itself has the additional effect of revising heater block 72 positions.

In addition, the present invention is not limited to above-described embodiment, and it can append various changes and be implemented in the scope that does not break away from purport of the present invention.

For example, also the position of the pressure-containing parts 74 that can represent in being equivalent to described Fig. 2 is provided with pyrotoxin shown in Figure 9 79, makes the device and the pressure-containing parts of described pyrotoxin 79 double as heating heater block 72.This pyrotoxin 79 is comparatively suitable with the ceramic heater array.

In addition, in the respective embodiments described above, heater block 72 with pyrotoxin 77 heating is made of the first banded for no reason hold assembly, constitute by second hold assembly with the welded part 73 of heater block 72 crimping with the roller shape of these heater block 72 crimping, but, on the contrary, embodiment that also can be as shown in figure 10 is such, second hold assembly 102 of roller shape constitutes the heater block that is heated by the pyrotoxin 77 that is arranged on its central part, and the first banded for no reason hold assembly 101 constitutes pressure-producing part.In this embodiment, be provided with block pad 78 in the inboard of described first hold assembly 101 as pressure-containing parts.Described pad 78 is configured in respect to the part that constitutes clamping part N in described first hold assembly 101 with 102 crimping of described second hold assembly, can bear the position from the applied pressure of described second hold assembly 102.

In addition, expression has separating plate 104 in Fig. 9 and Figure 10.Described separating plate 104 is set in place the position near the outer peripheral face of the outer peripheral face of heater block 72 or second hold assembly 102 in the downstream of clamping part N one side, to promote that plates separate from described outer peripheral face.

As mentioned above, relating to fixing device of the present invention comprises: the first banded for no reason hold assembly that is heated by pyrotoxin; Second hold assembly, rotate with the state that is crimped on described first hold assembly, make described first hold assembly with the direction of the rotary middle spindle quadrature of this second hold assembly on driven, and and described first hold assembly between form the clamping part that plates can enter; Pressure-containing parts is arranged to contact with the medial surface of described first hold assembly, bears from described second hold assembly to the described first hold assembly applied pressure at described clamping part; Slip parts,, have the face that slips that the axial end portion with described first hold assembly slips in order to limit described first hold assembly to direction parallel that is axial displacement with the rotary middle spindle of described second hold assembly; Supporting mechanism supports the described parts that slip.

Described supporting mechanism, the medial surface at the position of a side opposite with described pressure-containing parts in the axial end portion of the described face that slips that slips parts and described first hold assembly is contacted, and follow described first hold assembly along described axial, make the described parts that slip carry out displacement to the direction that this face that slips that slips parts leaves described pressure-containing parts to leaving the displacement that described direction of slipping parts is carried out.

Described displacement of slipping parts, the friction force between the described medial surface that slips the face and first hold assembly and the medial surface and the friction force between the pressure-containing parts of described first hold assembly are increased, the increase of these friction force can bring into play preventing or effectively suppress described first hold assembly from described braking action of slipping parts along the axial displacement of first hold assembly.And, described braking action makes the velocity of rotation of axial end portion of first hold assembly of the side that described friction force increases, velocity contrast rotates between the end velocity of rotation of an opposite side with it, this rotary speed difference makes the direct of travel of described first hold assembly change to the direction of the axial location of revising this first hold assembly.

The axial deflection of first hold assembly, snakelike advancing can be promptly cleared up in above effect, prevent because of the breakage of described deflection, snakelike first hold assembly that causes of advancing etc.

In fixing device of the present invention, for example, described first hold assembly can constitute the heater block by described pyrotoxin heating, and described second hold assembly can constitute the pressure-producing part that is crimped on described heater block.Perhaps also can be opposite.

In the present invention, preferably, the described parts that slip are provided with respectively in the axial both sides of described first hold assembly, and described supporting mechanism supports the parts that slip of both sides.The described configuration of components of slipping can effectively limit the abnormal displacements of described first hold assembly to axial both sides.

In the fixing device of the present invention, preferably, also comprise the framework that supports described pressure-containing parts, described supporting mechanism is installed on the described framework.Support pressure-containing parts and supporting mechanism by same framework like this, can stablize two relative position relations that slip between the parts that described pressure-containing parts and described supporting mechanism supports.

As the described concrete structure that slips parts and described supporting mechanism, preferably, the described parts that slip have the restrictions that can carry out butt with the axial end of described first hold assembly, described supporting mechanism has the described parts that slip of support, make described parts axially can carry out the support portion from displacement to described first hold assembly of slipping, and slip the portion of pressing that parts press to what described support portion was supported, this presses portion described restrictions of slipping parts is pressed to the direction that the end face with described first hold assembly carries out butt, described support portion has the described guide portion of slipping parts of guiding, to follow the described parts that slip, make this slip slipping of parts and carry out displacement towards the direction of leaving described pressure-containing parts to the displacement of carrying out near the direction of described first hold assembly.

In this fixing device, in the normal state, the restrictions of slipping parts is pressed in the axial end of first hold assembly by the throw-on pressure of the portion of pressing, and thus, the axial location of described first hold assembly is remained on regular position.When first hold assembly when axially leaving this position, be positioned at a side of leaving and the parts that slip that are positioned at an opposite side, by acting on the throw-on pressure that this slips parts, to the sense of displacement of following described first hold assembly that is inwardly carry out displacement, this displacement and based on the guide portion of described support portion to slipping the guiding of parts, make and describedly slip slipping of parts and carry out displacement towards direction away from described pressure-containing parts.This displacement produces above-mentioned braking action.

Therefore, in this device, by only make up to slip that parts support and the support portion that guides and the described parts that slip to the so simple structure of the portion of pressing that one side pressure of first hold assembly is leaned on, just can prevent or effectively suppress the axial deflection of described first hold assembly, snakelike advance etc.

As described guide portion, preferably, have the dip plane that tilts to along with the direction of axially leaving described pressure-containing parts near this first hold assembly along described first hold assembly, and along the described parts that slip of described dip plane guiding.

In addition, described support portion has with described slips the lateral wall that parts are compared the axial outside that is positioned at described first hold assembly, and the guiding wall that extends and have described guide portion to described first hold assembly from described lateral wall, if the described portion of pressing has with elastic compression between described lateral wall with describedly slip between the parts and be installed in elastomeric element on the described support portion, then described support portion and described blocking of pressing portion can make the installation of these parts become easy.

At this moment, preferably, described support portion, comprise first guiding wall and second guiding wall as above-mentioned guiding wall, described first guiding wall has first guide portion, this first guide portion is from comparing described parts that slip of a side contacts near described pressure-containing parts with the described parts that slip, described second guiding wall has second guide portion, this second guide portion is from a side contacts described the slip parts opposite with described this pressure-containing parts, described support portion is by described first guiding wall and the described parts that slip of the described second guiding wall clamping.Described first guiding wall and described second guiding wall stably support the described parts that slip, simultaneously the described suitable direction of parts guiding of slipping.

, be provided with described support portion and press portion when slipping parts and being provided with respectively when described as long as described supporting mechanism slips parts at each in the axial both sides of described first hold assembly.

In addition, if comprise the framework that supports described pressure-containing parts in this fixing device, described framework has with the described parts that respectively slip compares the axial outside that lays respectively at described first hold assembly and the sidewall that supports described pressure-containing parts, and the main wall that connects these sidewalls, described support portion and the described portion of pressing are installed in the medial surface of described sidewall respectively, so, support pressure-containing parts and described support portion both sides by same framework, can stablize the relative position of the guide portion of described pressure-containing parts and described support portion, therefore can more correctly determine to slip the relative position of parts with respect to pressure-containing parts.

In addition; as described other structures of slipping parts and described supporting mechanism; the described parts that respectively slip have the face that slips very much; the described axial outside and the described face that slips adjacency of slipping parts of slipping very much face at described first hold assembly; have when the axial end portion of described first hold assembly and contact and bear the shape of slipping the high pressure of pressure that face bears with the medial surface of this end when slipping towards described first hold assembly that axially the outside is outstanding from described first hold assembly than described from described; described supporting mechanism has swing part; described swing part can be that the axle that the center centers on the direction of this axial quadrature shakes with the fulcrum between the axial two ends of described first hold assembly; and comprise fixing described both ends of respectively slipping parts; described swing part shakes; carry out displacement by put on the described pressure that slips very much face from described first hold assembly to direction with the parts that slip that allow a side, and in this displacement, make the opposing party's the parts that slip carry out displacement to the direction of leaving described pressure-containing parts near described pressure-containing parts.

In this fixing device; when first hold assembly along axially leaving regular position; thus the axial end portion of this first hold assembly from any one party slip parts slip towards the face that slips very much when outstanding; because this side's the pressure from first hold assembly that parts bear that slips uprises; swing part just shakes; carry out displacement with the parts that slip that allow this side to direction, and in this displacement, make the opposing party's the parts that slip carry out displacement to the direction of leaving described pressure-containing parts near described pressure-containing parts.This opposing party's the displacement of slipping parts produces the described braking action that realizes based on the slipping parts of this opposing party.Therefore, in this device,, just can prevent or effectively suppress the axial deflection of described first hold assembly, snakelike advance etc. by only supporting two simple structures of slipping parts with swing part.

Herein, preferably, described slipping very much towards along with the direction of leaving described pressure-containing parts along axially the leaving this first hold assembly of described first hold assembly tilts.The face that slips very much of Qing Xieing is followed the end of first hold assembly to slip very much the increase of the overhang of face to this, and is born the bigger pressure from this first hold assembly end like this.And in the less stage of the overhang of the first hold assembly end, this inclination self performance of slipping very much face makes this first hold assembly end return to the effect of regular position.

In this fixing device, preferably, also comprise the framework that supports described pressure-containing parts, described swing part is that the center can joltily be supported on the described framework with described fulcrum.Support described pressure-containing parts and described swing part both sides by same framework, that can stablize that this pressure-containing parts and this swing part supports slips relative position relation between the parts, therefore can more correctly determine to slip the relative position of parts with respect to pressure-containing parts.

Particularly, preferably, described framework has with the described parts that respectively slip compares the axial outside that lays respectively at described first hold assembly and the sidewall that supports described pressure-containing parts, and be positioned at a side opposite and connect the main wall of described sidewall with described clamping part across described first hold assembly, described swing part can joltily be supported on this body wall between described first hold assembly and described main wall.In this structure, described framework can support described swing part and described pressure-containing parts in place respectively by its main wall and sidewall.

In addition, preferably, equate each other to described distance of respectively slipping parts from the fulcrum of described swing part.Like this, can make and follow two displacements of surveying that slip parts that shake of swing part to equate, can carry out impartial restriction the axial both sides of first hold assembly.

In addition, the invention provides a kind of image processing system, this image processing system has fixing device discussed above and the toner that is used to form image is carried on image forming part on the plates.In this image processing system, described fixing device makes the toner that is positioned on the described plates by described image forming part carry out photographic fixing well, can form high quality images thus.

Claims (16)

1. fixing device is used for carrying out photographic fixing at the toner that image processing system is carried on to plates, it is characterized in that comprising:

For no reason Dai Zhuan first hold assembly;

Second hold assembly, rotate with the state that is crimped on described first hold assembly, make described first hold assembly with the direction of the rotary middle spindle quadrature of this second hold assembly on driven, and and described first hold assembly between form the clamping part that plates can enter;

Pyrotoxin, at least one side who is used to heat described first hold assembly and described second hold assembly;

Pressure-containing parts is arranged to contact with the medial surface of described first hold assembly, bears from described second hold assembly to the described first hold assembly applied pressure at described clamping part;

Slip parts, have the face that slips that can slip with the axial end portion of described first hold assembly;

And

Supporting mechanism, support the described parts that slip, the medial surface at the position of a side opposite with described pressure-containing parts in the axial end portion of the described face that slips that slips parts and described first hold assembly is contacted, and follow described first hold assembly along described axial, make the described parts that slip carry out displacement to the direction that this face that slips that slips parts leaves described pressure-containing parts to leaving the displacement that described direction of slipping parts is carried out.

2. fixing device according to claim 1 is characterized in that,

Described first hold assembly constitutes the heater block by described pyrotoxin heating,

Described second hold assembly constitutes the pressure-producing part that is crimped on described heater block.

3. fixing device according to claim 1 is characterized in that,

The described parts that slip are provided with respectively in the axial both sides of described first hold assembly,

Described supporting mechanism supports the parts that slip of both sides.

4. fixing device according to claim 1 is characterized in that,

Also comprise the framework that supports described pressure-containing parts,

Described supporting mechanism is installed on the described framework.

5. fixing device according to claim 1 is characterized in that,

The described parts that slip have the restrictions that can carry out butt with the axial end of described first hold assembly,

Described supporting mechanism has the support portion and presses portion, the described parts that slip are supported in described support portion, so that the described parts that slip axially can carry out displacement to described first hold assembly, parts are slipped with what described support portion was supported in the described portion of pressing, press direction to the end face butt that makes this restrictions of slipping parts and described first hold assembly

Described support portion has the described guide portion of slipping parts of guiding, to follow the described parts that slip to the displacement of carrying out near the direction of described first hold assembly, makes this slip slipping towards the direction of leaving described pressure-containing parts of parts and carries out displacement.

6. fixing device according to claim 5 is characterized in that,

Described guide portion has the dip plane, and described dip plane is to along with the direction of axially leaving described pressure-containing parts near described first hold assembly along described first hold assembly tilts, and described guide portion is along the described parts that slip of described dip plane guiding.

7. fixing device according to claim 5 is characterized in that,

Described support portion has with described slips the lateral wall that parts are compared the axial outside that is positioned at described first hold assembly, and the guiding wall that extends and have described guide portion to described first hold assembly from described lateral wall,

The described portion of pressing has the elastomeric element that is installed in described support portion, described elastomeric element with elastic compression between described lateral wall and described slipping between the parts.

8. fixing device according to claim 7 is characterized in that,

Described support portion comprises as first guiding wall of above-mentioned guiding wall and second guiding wall, described first guiding wall has first guide portion, this first guide portion is from comparing described parts that slip of a side contacts near described pressure-containing parts with the described parts that slip, described second guiding wall has second guide portion, this second guide portion is from a side contacts described the slip parts opposite with described pressure-containing parts, and described support portion is by described first guiding wall and the described parts that slip of the described second guiding wall clamping.

9. fixing device according to claim 5 is characterized in that,

The described parts that slip are provided with respectively in the axial both sides of described first hold assembly,

Described supporting mechanism slips parts at each and is provided with described support portion and presses portion.

10. fixing device according to claim 9 is characterized in that,

Also comprise the framework that supports described pressure-containing parts,

Described framework has with the described parts that respectively slip compares the axial outside that lays respectively at described first hold assembly and the sidewall that supports described pressure-containing parts, and the main wall that connects these sidewalls,

Described support portion and the described portion of pressing are installed in the medial surface of described sidewall respectively.

11. fixing device according to claim 3 is characterized in that,

The described parts that respectively slip have the face that slips very much; the described axial outside and the described face that slips adjacency of slipping parts of slipping very much face at described first hold assembly; have when the axial end portion of described first hold assembly and contact and bear the shape of slipping the high pressure of pressure that face bears from described first hold assembly than described from described slipping towards the axial outside of described first hold assembly when outstanding with the medial surface of this end

Described supporting mechanism has swing part; described swing part can be that the axle that the center centers on the direction of this axial quadrature shakes with the fulcrum between the axial two ends of described first hold assembly; and comprise fixing described both ends of respectively slipping parts; described swing part shakes; carry out displacement by put on the described pressure that slips very much face from described first hold assembly to direction with the parts that slip that allow a side, and in this displacement, make the opposing party's the parts that slip carry out displacement to the direction of leaving described pressure-containing parts near described pressure-containing parts.

12. fixing device according to claim 11 is characterized in that,

Described slipping very much towards along with the direction of leaving described pressure-containing parts along described first hold assembly of axially leaving of described first hold assembly tilts.

13. fixing device according to claim 11 is characterized in that,

Also comprise the framework that supports described pressure-containing parts,

Described swing part is that the center can joltily be supported on the described framework with described fulcrum.

14. fixing device according to claim 13 is characterized in that,

Described framework has with the described parts that respectively slip compares the axial outside that lays respectively at described first hold assembly and the sidewall that supports described pressure-containing parts, and be positioned at a side opposite and connect the main wall of described sidewall with described clamping part across described first hold assembly

Described swing part can joltily be supported on the described main wall between described first hold assembly and described main wall.

15. fixing device according to claim 11 is characterized in that,

Equate each other to described distance of respectively slipping parts from the fulcrum of described swing part.

16. an image processing system that is used for forming image on plates is characterized in that comprising:

The toner that is used to form image is carried on image forming part on the described plates; And

To the toner that is carried on the described plates carry out photographic fixing as each described fixing device in the claim 1 to 15.

Images