CN110389503A - Paper pilot unit, fixing device and image forming apparatus - Google Patents
Paper pilot unit, fixing device and image forming apparatus Download PDFInfo
- Publication number
- CN110389503A CN110389503A CN201810337688.0A CN201810337688A CN110389503A CN 110389503 A CN110389503 A CN 110389503A CN 201810337688 A CN201810337688 A CN 201810337688A CN 110389503 A CN110389503 A CN 110389503A
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- China
- Prior art keywords
- paper
- rail portion
- extension
- pilot unit
- conveyance direction
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6573—Feeding path after the fixing point and up to the discharge tray or the finisher, e.g. special treatment of copy material to compensate for effects from the fixing
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- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
The present invention relates to paper pilot unit, fixing device and image forming apparatuses, the paper pilot unit is set to the paper conveyance direction downstream side of fixing section, guide clearance when for guiding the paper after being carried out fixing and ensure logical paper, it has: rail portion, it extends along paper transport path, for guiding the paper after being carried out fixing；And extension, it is connected to the end of the paper conveyance direction upstream side of above-mentioned rail portion, for above-mentioned rail portion to be fixed on to the rail portion supporting device of fixing device, the length direction two sides between rail portion and extension are provided with opening.Make the thermal expansion amount of rail portion entirety consistent as a result, inhibits rail portion deformation, it is ensured that guide clearance when logical paper.
Description
Technical field
The present invention relates to a kind of paper pilot unit, fixing device and image forming apparatuses, make more particularly, to one kind
The thermal expansion amount of rail portion entirety is consistent, inhibits rail portion deformation, it is ensured that the paper pilot unit of guide clearance when logical paper is determined
Image device and image forming apparatus.
Background technique
In the prior art, as shown in Figure 18 and Figure 19, a kind of image forming apparatus is disclosed, it is single to have paper guiding
Member, the paper pilot unit include rail portion 611 and extension 612.For reasons such as intensity, costs, rail portion 611 and extension
Using being integrally formed, the rail portion 611 and extension 612 and rail portion supporting device 613 being formed as one are connected to one in portion 612
It rises.To which rail portion 611, extension 612 and rail portion supporting device 613 can be to be located at rail portion supporting device 613
The rotation center R of lower section is pivoted about.
However, so fixing roll temperature rises, it is fixed to make since fixing section is by heating pressurization by carbon powder fixation on paper
Rail portion 611 near shadow portion and 612 temperature of extension rise, but rail portion 611 and the temperature of extension 612 and inhomogenous.
Rail portion 611 is closer to fixing roller, thus temperature is higher, can usually be warming up to 80 DEG C or so.And extension 612 compares rail portion
611 further from fixing roller, thus temperature is lower, can usually be warming up to 40 DEG C or so.This temperature unevenness can cause rail portion 611
Become inconsistent with the thermal expansion amount of extension 612, so that the extension 612 being integrally formed with rail portion 611 can inhibit guide rail
Thus the thermal expansion in portion 611 causes rail portion 611 and deforms.In particular, the deformation in the length direction center of rail portion 611
Amount is bigger, and guide clearance corresponding to the especially center of the end in the paper conveyance direction downstream side of rail portion 611 tends to close
Conjunction state.So, when paper passes through, resistance increases, to transport, bad (such as paper jam, wave are beaten, image abrades
The problems such as).
In addition, in the prior art, also there is the paper conveyance direction downstream side that rotation center R is set to rail portion 611
End near situation, however, this structure is in paper jam operation processing, operating space is smaller, inconvenient, moreover, together
There are the above problems present in the structure of Figure 18 and Figure 19 for sample.
Summary of the invention
The present invention be it is completed to solve the above problems, its purpose is to provide the thermal expansion amounts for making rail portion entirety
Unanimously, inhibit rail portion deformation, it is ensured that the paper pilot unit of guide clearance when logical paper.
A kind of paper pilot unit is set to the paper conveyance direction downstream side of fixing section, is carried out for guiding
Paper after fixing, which is characterized in that the paper pilot unit has: rail portion extends along paper transport path, for drawing
Lead the paper after being carried out fixing；And extension, it is connected to the end of the paper conveyance direction upstream side of the rail portion
Portion, for the rail portion to be fixed on to the rail portion supporting device of fixing device, in the rail portion and the extension
Between length direction two sides be provided with opening.
Length direction two sides between the rail portion and the extension are provided with opening, thus rail portion and extension
The part except length direction center between portion is divided by opening, removes so as to reduce extension to the paper of rail portion
The inhibition for sending the thermal expansion of the part except the length direction center of the end of direction upstream side guarantees the paper conveying of rail portion
The thermal expansion amount of the end in the paper conveyance direction downstream side of the end and rail portion of direction upstream side reaches unanimity, to inhibit
Rail portion deformation, it is ensured that guide clearance when logical paper.
In addition, in above-mentioned paper pilot unit, can also the rail portion and the extension it is complete by the opening
It disconnects, is connected into the rail portion and the extension relatively movably by interconnecting piece.
Rail portion and extension are open and are fully disconnected, thus extension can with for support rails portion and extension
Rail portion supporting device by the type of being made of one piece together.It is integrally formed due to using, so can reduce cost.Separately
Outside, rail portion and extension are connected into relatively movably, to can equally reduce extension to rail portion by interconnecting piece
The inhibition of the thermal expansion of the end of paper conveyance direction upstream side, guarantee the paper conveyance direction upstream side of rail portion end and
The thermal expansion amount of the end in the paper conveyance direction downstream side of rail portion reaches unanimity, so that rail portion be inhibited to deform, it is ensured that logical
Guide clearance when paper.
In addition, in above-mentioned paper pilot unit, can also the rail portion paper conveyance direction upstream side end
With rotation fulcrum, it the rail portion connected by interconnecting piece can be with the rotation fulcrum relative to the extension
The heart rotates freely.
By enabling rail portion to rotate freely centered on rotation fulcrum relative to extension, so that rail portion is in certainly
By state, thus the resistance being subject to is smaller, and thus, it is possible to better assure guide clearance when logical paper.
In addition, in above-mentioned paper pilot unit, can also the rail portion be divided into multistage along its length
Guide rail section.
If rail portion is divided into the guide rail section of multistage along its length, each section of guide rail section being partitioned into is respectively
Thermal expansion amount become smaller, even if being deformed because temperature is inhomogenous, the respective deflection of each section of guide rail section is also smaller, thus
It can better assure guide clearance when logical paper.
In addition, in above-mentioned paper pilot unit, centrally located in the guide rail section for the multistage that can also be partitioned into is led
Rail section is connected to rotate freely relative to the extension.
The centrally located guide rail section in guide rail section by making the multistage being partitioned into is connected to can be relative to extension
It rotates freely, so that centrally located guide rail section is in free state, thus the resistance being subject to is smaller, and thus, it is possible to for easy
There is gap to become smaller the guide clearance of the center of problem when more targetedly ensuring logical paper.
In addition, in above-mentioned paper pilot unit, centrally located in the guide rail section for the multistage that can also be partitioned into is led
The thermal expansion coefficient of rail section is less than the thermal expansion coefficient of other guide rail sections.
Price is relatively high and the centrally located guide rail section in the guide rail section for only making multistage is small using thermal expansion coefficient
Expensive material being capable of save the cost compared with whole guide rail sections are all made of the small material of thermal expansion coefficient.
In addition, in above-mentioned paper pilot unit, it can also be in the paper conveyance direction downstream side in the rail portion
End is provided with elongated elastomeric member.
The end in the paper conveyance direction downstream side of rail portion is the relatively large position of thermal expansion amount, and the paper of rail portion
The end of conveyance direction upstream side due to extension limitation and become the relatively small position of thermal expansion amount.By in guide rail
Elongated elastomeric member is arranged in the end in the paper conveyance direction downstream side in portion, is able to suppress the paper conveyance direction downstream of rail portion
The deflection of the end of side guarantees on the end in paper conveyance direction downstream side and the paper conveyance direction of rail portion of rail portion
The thermal expansion amount for swimming the end of side is consistent, so that it is guaranteed that guide clearance when logical paper.
In addition, in above-mentioned paper pilot unit, it can also be at the end of the paper conveyance direction upstream side of the rail portion
Portion is provided with elasticity of compression component.
Elasticity of compression component is set by the end in the paper conveyance direction upstream side of rail portion, rail portion can be increased
Paper conveyance direction upstream side end deflection, guarantee end and the guide rail in the paper conveyance direction downstream side of rail portion
The thermal expansion amount of the end of the paper conveyance direction upstream side in portion is consistent, so that it is guaranteed that guide clearance when logical paper.
Detailed description of the invention
Fig. 1 is the schematic diagram for indicating the image forming apparatus for the paper pilot unit for having of the invention.
Fig. 2 is the schematic diagram for indicating the fixing device for the paper pilot unit for having of the invention.
Fig. 3 is the simplified schematic diagram for indicating the paper pilot unit of first embodiment of the invention from an angle.
Fig. 4 is the schematic isometric for indicating the paper pilot unit of first embodiment of the invention.
Fig. 5 is the schematic isometric for indicating the paper pilot unit of first embodiment of the invention.
Fig. 6 is the schematic diagram for indicating the case where interconnecting piece is provided with an opening.
Fig. 7 is to indicate that the schematic diagram for the case where there are two openings is arranged in interconnecting piece.
Fig. 8 is the schematic diagram for indicating the decomposing state of paper pilot unit of third embodiment of the present invention.
Fig. 9 is the schematic diagram for indicating the assembled state of paper pilot unit of third embodiment of the present invention.
Figure 10 is the schematic diagram of installing mechanism used by indicating the paper pilot unit of third embodiment of the present invention.
Figure 11 is the part E of installing mechanism used by indicating the paper pilot unit of third embodiment of the present invention
Enlarged partial sectional view.
Figure 12 is the part F of installing mechanism used by indicating the paper pilot unit of third embodiment of the present invention
Enlarged partial sectional view.
Figure 13 be indicate can free wxpansion installing mechanism variation schematic diagram.
Figure 14 is the schematic diagram for indicating the paper pilot unit of the 4th embodiment of the invention.
Figure 15 is the schematic diagram for indicating the paper pilot unit of the 5th embodiment of the invention.
Figure 16 is the schematic diagram for indicating the variation of paper pilot unit of the 5th embodiment.
Figure 17 is the schematic diagram for indicating the paper pilot unit of sixth embodiment.
Figure 18 is the schematic diagram for indicating paper pilot unit in the prior art.
Figure 19 is the simplified schematic diagram for indicating paper pilot unit in the prior art.
Reference text explanation:
36 ... fixing devices；50 ... paper pilot units；51 ... rail portions；In the paper conveyance direction of 51a ... rail portion
Swim the end of side；The end in the paper conveyance direction downstream side of 51b ... rail portion；52 ... extensions；53 ... openings；54 ... stretch
Elastomeric element；55 ... elasticity of compression components；56 ... cooling devices；58 ... rail portion supporting devices；59 ... guide clearances；511,
512,513,514 ... guide rail section.
Specific embodiment
Hereinafter, the preferred embodiment of the present invention is described in detail based on attached drawing.In addition, for those skilled in the art
For member, it can be realized their a variety of alternatives under the enlightenment of these embodiments, moreover, the present invention is not limited thereto
Locate the preferred embodiment of explanation.
Firstly, being formed to the fixing device with paper pilot unit of the invention and the image for having the fixing device
The overall structure of device is illustrated.
Fig. 1 is the schematic diagram for indicating the image forming apparatus for the paper pilot unit for having of the invention.As shown in Figure 1, figure
As forming the image forming apparatus that device 10 is so-called intermediate transfer mode, comprising: be horizontally set up in inside framework 12, edge
The mobile transfer belt 14 in the direction arrow A；4 imaging unit 16C, 16M being arranged along the moving direction of transfer belt 14,16Y,
16K；Primary transfer roller 18C, 18M, 18Y, the 18K being arranged in correspondence with each imaging unit；And secondary transfer unit 20.It will lead to
The toner image for crossing the assorted ingredient that each imaging unit 16C, 16M, 16Y, 16K are formed, is temporarily overlappingly needed on transfer belt 14
Later, it is needed on paper and forms color image.
Specifically, imaging unit 16C, 16M, 16Y, 16K is respectively provided with: using as cylinder part photosensitive drums 22C, 22M,
Charged elements 24C, 24M, 24Y, the 24K being configured at centered on 22Y, 22K around photosensitive drums；And developing cell 26C, 26M,
26Y,26K.Imaging unit 16C ..., the lower section of 16K be configured with exposing unit 28, exposing unit 28 is towards each photosensitive drums
22C ..., 22K injection have been carried out the laser LB after light modulation.
The photosensitive drums 22C that is rotated along the direction arrow B ..., the surface of 22K because charged elements 24C ..., 24K due to same
It after charge, is exposed by the irradiation of the laser LB, is formed on its surface electrostatic latent image, the electrostatic latent image is by development
Unit 26C ..., 26K be developed into toner image (developedization).In addition, each developing cell 26C ..., 26K is by C (cyan), M
(magenta), Y (yellow), K (black) toner as developer be respectively fed to photosensitive drums 22C ..., 22K and form toning
Agent picture.
Be formed in each photosensitive drums 22C ..., the toner image of 22K by primary transfer roller 18C ..., 18K and photosensitive drums
22C ..., the effect of electric field that generates between 22K, be successively transferred in mobile transfer belt 14.
On the other hand, the toner image by pick-up roller 32 on paper, with transfer belt 14 derived from the paper feeding cassette 30 reaches
Time consistency in secondary transfer unit 20, secondary transfer unit 20 is transported to after being positioned by registration roller 34.Secondary transfer printing
The toner image being overlapped in transfer belt 14 is transferred on paper by unit 20.Later, it is transported transferred with the paper of toner image
To fixing device 36.
Fig. 2 is the schematic diagram for indicating the fixing device for the paper pilot unit for having of the invention.As depicted in figs. 1 and 2, fixed
Image device 36 has the fixing roller 38 as cylinder part and the pressure roller 40 as pressing component.In the hollow of fixing roller 38
Portion is built-in with the heating part 42 as heat source.Fixing roller 38 and pressure roller 40 constitute fixing section.By coming from motor (not shown)
And the rotary power transmitted through not shown power transfer mechanism, rotate fixing roller 38 towards the direction arrow G in Fig. 1.Add
Pressure roller 40 is, for example, the roller made of the elastic layer that metal mandrel outer peripheral surface forms silicon rubber, fluororesin etc..Pressure roller 40
Fixing roller 38 is crimped on by compression joint mechanism (not shown).By the crimping, formed between fixing roller 38 and pressure roller 40
Fusing nip, is driven in the rotation of fixing roller 38, and pressure roller 40 also rotates.The paper for making load hold unfixed toner image is logical
The fusing nip is crossed, to being fixed toner image on the paper.Finally, fixing has the paper of toner image to pass through distributing roller
44 are discharged to discharge tray 46.
< first embodiment >
Hereinafter, being said referring to specific structure of Fig. 2~Fig. 5 to the paper pilot unit of first embodiment of the invention
It is bright.Fig. 3 is the simplified schematic diagram for indicating the paper pilot unit of first embodiment of the invention.Fig. 4 is to indicate of the invention
The schematic isometric of the paper pilot unit of one embodiment.Fig. 5 is the paper guiding for indicating first embodiment of the invention
The schematic isometric of unit.
As shown in Fig. 2~Fig. 5, for the toner image fixing of transfer to be had in the fixing device 36 of paper: being configured at
The fixing roller 38 of fixing face (face for being formed with toner image) side of paper；(the opposite of face is fixed with the back side for being configured at paper
Face) side and across paper transport path and the pressure roller 40 opposed with fixing roller 38.
In the paper conveyance direction downstream side of fixing device 36, specifically, constituted with fixing roller 38 and pressure roller 40
Fixing section compared to more lean on paper conveyance direction downstream side position, be provided with for guide be carried out be fixed after paper simultaneously
Ensure the paper pilot unit 50 of the guide clearance 59 when leading to paper.
Paper pilot unit 50 has: rail portion 51, extends along paper transport path, has been carried out fixing for guiding
Paper afterwards；With extension 52, be connected to the end 51a of the paper conveyance direction upstream side of rail portion 51, towards with it is logical
The vertical and direction far from logical paper of paper extends, and rail portion 51 is fixed on to the rail portion supporting device 58 of fixing device 36
On.
As shown in Figure 4 and Figure 5, rail portion 51 is generally formed into rectangle tabular, along the side that paper conveyance direction extends
Be formed as short side, and be formed as long side along the side that the direction vertical with paper conveyance direction extends, hereinafter, by the length of rail portion 51
The direction definition on side is length direction or longitudinal direction, i.e. in Fig. 2 perpendicular to the substantially right and left in the direction of paper, Fig. 3
To.
Be formed as a plurality of rib for guidance on the surface of rail portion 51.Extension 52 is equally generally formed into rectangular
Shape plate, extends towards direction identical with the extending direction of rail portion 51, and long side is corresponding with the long side of rail portion 51.
In the present embodiment, the opening 53 of strip is provided between rail portion 51 and extension 52, be open 53 edges
The length direction of rail portion 51 is extended, for example, opening 53 is not arranged throughout the whole length direction of rail portion 51, changes sentence
It talks about, opening 53 will not be fully disconnected between rail portion 51 and extension 52.
Specifically, as shown in Fig. 3~Fig. 5, the part of the longitudinal direction two sides between rail portion 51 and extension 52, edge
Rail portion 51 and the longitudinal direction of extension 52 are extended to form there are two opening 53,53 length from rail portion 51 of one of opening
An end for spending direction extends towards the length direction center of rail portion 51, and another 53 length from rail portion 51 of opening
Another end in direction extends towards the length direction center of rail portion 51, also, the two openings 53 do not connect,
In other words, the length direction center between rail portion 51 and extension 52 is provided with the interconnecting piece not disconnected by opening 53
57。
In existing image forming apparatus, since fixing section is pressurizeed by carbon powder fixation on paper by heating, so
It is fixed roll temperature to rise, increase rail portion and extension temperature near fixing section, but rail portion and the temperature of extension are simultaneously
It is inhomogenous.Rail portion is closer to fixing roller, thus temperature is higher, can usually be warming up to 80 DEG C or so.And extension compares guide rail
Portion is further from fixing roller, thus temperature is lower, can usually be warming up to 40 DEG C or so.This temperature unevenness can cause rail portion and prolong
The thermal expansion amount of extending portion becomes inconsistent, so that the extension being integrally formed with rail portion can inhibit the thermal expansion of rail portion, by
This causes rail portion and deforms.In particular, the deflection in the length direction center of rail portion is bigger, the paper conveying of rail portion
Guide clearance corresponding to the especially center of the end in direction downstream side tends to closed state.So, when paper passes through
When, resistance increases, to transport bad (such as the problems such as paper jam, wave are beaten, image scratch).
And in the present embodiment, the length direction two sides between rail portion 51 and extension 52 are provided with opening 53,
Thus the part except the length direction center between rail portion 51 and extension 52 is divided by opening 53, so as to reduce
Extension 52 is swollen to the heat of the part except the length direction center of the end 51a of the paper conveyance direction upstream side of rail portion 51
Swollen inhibition, guarantee rail portion 51 the end 51a of paper conveyance direction upstream side and the paper conveyance direction of rail portion 51 under
The thermal expansion amount for swimming the end 51b of side reaches unanimity, so that rail portion 51 be inhibited to deform, it is ensured that the guide clearance 59 when logical paper.
< second embodiment >
It is in place of the difference of second embodiment and first embodiment, the connection between rail portion 51 and extension 52
Portion 57 is divided into multistage, in other words, interconnecting piece 57 is provided with one or more openings.Fig. 6 is to indicate that interconnecting piece is provided with
The schematic diagram of the case where one opening, Fig. 7 are to indicate that the schematic diagram for the case where there are two openings is arranged in interconnecting piece.By making guide rail
Interconnecting piece 57 between portion 51 and extension 52 is divided into multistage, thus, it is possible to be further reduced the area of interconnecting piece, so as to
It is enough further reduced the inhibition of thermal expansion of the extension 52 to the end 51a of the paper conveyance direction upstream side of rail portion 51, into
One step inhibits rail portion 51 to deform.
It should be noted that be set to the shape of the opening of interconnecting piece 57 and quantity is not particularly limited, can according to need and
Suitably it is changed.
< third embodiment >
Rail portion 51 can also be fully disconnected with extension 52 by opening 53, in rail portion 51 and extension 52 by opening 53
In the case where being fully disconnected, can also be connected into rail portion 51 and extension 52 by the interconnecting piece of other structures relatively can
It is dynamic.
Such as shown in Fig. 8~Figure 12, be in place of the difference of third embodiment and first embodiment, rail portion 51 with
Extension 52 is fully disconnected by opening 53, in addition, extension 52 and the rail portion branch for being used for support rails portion 51 and extension 52
Mechanism 58 is held by the type of being made of one piece together.It is integrally formed due to using, so can reduce cost.
In addition, passing through the installing mechanism as interconnecting piece such as bolt and threaded hole between rail portion 51 and extension 52
Cooperate and connects.Wherein, the length direction two sides between rail portion 51 and extension 52 (part corresponding with E) leads to
Cross as interconnecting piece can the installing mechanism of free wxpansion be attached, and the length side between rail portion 51 and extension 52
To central (part corresponding with F), by as interconnecting piece can not the installing mechanism of free wxpansion be attached.
Specifically, as shown in figure 11, in part corresponding with E, the screw thread screwed for bolt 520 is provided in rail portion 51
Hole 510 is provided with hole portion 530 perforative for bolt 520, with the external screw thread diameter for being greater than bolt 520, bolt in extension 52
520 are combined on the threaded hole 510 of rail portion 51 via the hole portion 530 of extension 52, thus by rail portion 51 and extension 52
It connects.Herein, the wall thickness of extension 52 is formed as to the stationary plane of the head 521 for being slightly less than bolt 520 and rail portion 51
The distance between 511, in other words, make between extension 52 and the head 521 of bolt 520 there are certain gap and each other not
Contact.
Allow the free wxpansion of the length direction two sides of rail portion 51, as a result, so as to reduce extension 52 to guide rail
The inhibition of the thermal expansion of part except the length direction center of the end 51a of the paper conveyance direction upstream side in portion 51, guarantees
The end 51b in the paper conveyance direction downstream side of the end 51a and rail portion 51 of the paper conveyance direction upstream side of rail portion 51
Thermal expansion amount reach unanimity, so that rail portion 51 be inhibited to deform, it is ensured that the guide clearance 59 when logical paper.
It should be noted that can the installing mechanism of free wxpansion be not limited to the cooperation of bolt and threaded hole, also can be set
The structure of click on fashion shown in Figure 13.
For part corresponding with F, using normally can not the installing mechanism of free wxpansion be attached, in other words
It says, makes not having any gap between extension 52 and the head of bolt herein and be in contact with each other, omit herein detailed
Explanation.
The 4th embodiment > of <
It is in place of 4th embodiment and the difference of third embodiment, rail portion 51 is in paper conveyance direction upstream side
End have rotation fulcrum O, by the hinge 540 as interconnecting piece by rail portion 51 connect into can relative to extension 52 with
It is rotated freely centered on rotation fulcrum O.
Figure 14 is the schematic diagram for indicating the paper pilot unit of the 4th embodiment of the invention.As shown in figure 14, it is leading
Between rail portion 51 and extension 52, such as the length direction of the end 51a in the paper conveyance direction upstream side of rail portion 51
There are two hinge 540, rail portions 51 to be connected by two hinges 540 with extension 52 for two sides setting, thus makes rail portion 51
It can be rotated freely centered on rotation fulcrum O relative to extension 52.
It should be noted that the quantity of hinge 540 is not limited to two, as long as being changed as suitably desired,
For example, hinge 540 also can be set in the length direction center of the end 51a of the paper conveyance direction upstream side of rail portion 51.
In addition, be not limited to hinge, as long as i.e. using the mechanism that rail portion 51 can be enable to rotate freely relative to extension 52
It can.
By enabling rail portion 51 to rotate freely centered on rotation fulcrum O relative to extension 52, thus rail portion
51 are in free state, thus the resistance being subject to is smaller, and thus, it is possible to better assure the guide clearance 59 when logical paper.
The 5th embodiment > of <
It is in place of 5th embodiment and the difference of third embodiment, rail portion 51 is divided into along its length
The guide rail section of multistage.
Figure 15 is the schematic diagram for indicating the paper pilot unit of the 5th embodiment of the invention.As shown in figure 15, guide rail
Portion 51 is divided into 4 sections of guide rail section along its length, that is, guide rail section 511, guide rail section 512, guide rail section 513, guide rail section
514, the cut-off rule between each guide rail section extends along the width direction of rail portion 51.Hereinafter, when not needing especially to distinguish,
Guide rail section 511, guide rail section 512, guide rail section 513, guide rail section 514 are referred to as guide rail section 511~514.In addition, the number of guide rail section
Amount and size are not particularly limited, as long as being changed as suitably desired.
If rail portion 51 is divided into the guide rail section 511~514 of multistage along its length, each section be partitioned into
The respective thermal expansion amount of guide rail section 511~514 becomes smaller, even if being deformed because temperature is inhomogenous, each section of guide rail section 511~
514 respective deflections are also smaller, thus the guide clearance 59 when can better assure logical paper.
It is improved alternatively, it is also possible to the guide rail section for multistage.Figure 16 is the paper guiding for indicating the 5th embodiment
The schematic diagram of the variation of unit.In fig. 16 it is shown that rail portion 51 is divided into 3 sections of guide rail section along its length,
That is, the case where guide rail section 511, guide rail section 512, guide rail section 513, guide rail section 512 between guide rail section 511 and guide rail section 513,
Hereinafter, guide rail section 511, guide rail section 512, guide rail section 513 are referred to as guide rail section 511~513.In guide rail section 512 and extension
Hinge 540 is provided between 52, guide rail section 512 is connected by hinge 540 with extension 52, and guide rail section 512 is thus enable
It is rotated freely relative to extension 52.In other words, make centrally located in the guide rail section 511~513 for the multistage being partitioned into
Guide rail section 512 is connected to rotate freely relative to extension 52 with rotation fulcrum (not shown).
The centrally located guide rail section 512 in guide rail section 511~513 by making the multistage being partitioned into is connected to can phase
Extension 52 is rotated freely with rotation fulcrum (not shown), so that centrally located guide rail section 512 is in free state, because
And the resistance being subject to is smaller, thus, it is possible to for be easy to appear gap become smaller the center of problem more targetedly ensure logical paper when
Guide clearance 59.
In addition, the setting position of hinge is not limited to centrally located guide rail section 512, it can also be as shown in Figure 16
It is configured also for other guide rail sections, to better assure the guide clearance 59 when logical paper.
The heat of the centrally located guide rail section 512 in guide rail section 511~513 alternatively, it is also possible to make the multistage being partitioned into
The coefficient of expansion is less than the thermal expansion coefficient of other guide rail sections
And the centrally located guide rail section 512 in the guide rail section 511~513 for only making multistage is small using thermal expansion coefficient
The relatively expensive material of price can save compared with whole guide rail sections 511~513 are all made of the small material of thermal expansion coefficient
Cost.
< sixth embodiment >
It is in place of sixth embodiment and the difference of each embodiment, in the paper conveyance direction downstream side of rail portion 51
End 51b be provided with elongated elastomeric member 54.
Figure 17 is the schematic diagram for indicating the paper pilot unit of sixth embodiment of the invention.As shown in figure 17, it is leading
The end 51b in the paper conveyance direction downstream side in rail portion 51 is provided with elongated elastomeric member 54.Elongated elastomeric member 54 is, for example,
Extension spring, can be provided with multiple along the length direction of rail portion 51, and the specific number amount and type that are arranged can according to need
Suitably it is changed.
The end 51b in the paper conveyance direction downstream side of rail portion 51 is the relatively large position of thermal expansion amount, and guide rail
The end 51a of the paper conveyance direction upstream side in portion 51 due to extension 52 limitation and become the relatively small portion of thermal expansion amount
Position.Elongated elastomeric member 54 is set by the end 51b in the paper conveyance direction downstream side of rail portion 51, is able to suppress guide rail
The deflection of the end 51b in the paper conveyance direction downstream side in portion 51 guarantees the paper conveyance direction downstream side of rail portion 51
End 51b is consistent with the thermal expansion amount of end 51a of paper conveyance direction upstream side of rail portion 51, so that it is guaranteed that when logical paper
Guide clearance 59.
In addition, it's not limited to that, can also be provided in the end 51a of the paper conveyance direction upstream side of rail portion 51
Elasticity of compression component 55.Elasticity of compression component 55 is, for example, compressed spring, can be provided with along the length direction of rail portion 51
Multiple, specific setting number amount and type, which equally can according to need, to be suitably changed.
By the end 51a in the paper conveyance direction upstream side of rail portion 51, elasticity of compression component 55, Neng Gouzeng is set
Add the deflection of the end 51a of the paper conveyance direction upstream side of rail portion 51, under the paper conveyance direction for guaranteeing rail portion 51
The end 51b for swimming side is consistent with the thermal expansion amount of end 51a of paper conveyance direction upstream side of rail portion 51, so that it is guaranteed that logical
Guide clearance 59 when paper.
Alternatively, it is also possible to which elongated elastomeric member 54 and elasticity of compression component 55 are combined as shown in Figure 17, so as to
Better ensure that the end 51b in the paper conveyance direction downstream side of rail portion 51 and the paper conveyance direction upstream side of rail portion 51
End 51a thermal expansion amount it is consistent, thus the guide clearance 59 when better assuring logical paper.
The 7th embodiment > of <
It is in place of the difference of 7th embodiment and each embodiment, is provided with for carrying out cooling to rail portion 51
Cooling device 56.
As shown in Fig. 2, in rail portion 51 and logical paper opposite side, in other words, rail portion supporting device 58 it is interior
Portion is provided with cooling device 56, the cooling body of the routine such as can be cooling fan of cooling device 56.
By the way that cooling device 56 is arranged, it can guarantee that the whole temperature of rail portion 51 is uniform, the thermal expansion amount for keeping it whole
Become consistent, so as to better assure the guide clearance 59 when logical paper.
In addition, the specific location and set-up mode of cooling device 56 do not limit above situation, it is appropriate to can according to need
Ground is changed, such as cooling device 56 can be in the additional suction fan in the two sides of fixing device 36 and discharge fan, and chase after
Add wind path (such as good pipeline of thermal diffusivity), as long as can be realized the function of cooling rail portion 51.
It should be noted that can according to need the present invention is not limited to the respective embodiments described above by above-mentioned each embodiment
It is freely combined, is made various changes in the range of comprising technical idea of the invention.
Claims (10)
1. a kind of paper pilot unit is set to the paper conveyance direction downstream side of fixing section, determine for guiding to be carried out
The paper of movie queen, which is characterized in that
The paper pilot unit has:
Rail portion extends along paper transport path, for guiding the paper after being carried out fixing；With
Extension is connected to the end of the paper conveyance direction upstream side of the rail portion, for consolidating the rail portion
Due on the rail portion supporting device of fixing device,
Length direction two sides between the rail portion and the extension are provided with opening.
2. paper pilot unit according to claim 1, which is characterized in that
The rail portion is fully disconnected with the extension by the opening,
The rail portion and the extension are connected into relatively movably by interconnecting piece.
3. paper pilot unit according to claim 2, which is characterized in that
The rail portion has rotation fulcrum in the end of paper conveyance direction upstream side,
The rail portion is connected into and can freely be revolved centered on the rotation fulcrum relative to the extension by interconnecting piece
Turn.
4. the paper pilot unit according to any one of Claims 2 or 3, which is characterized in that
The rail portion is divided into the guide rail section of multistage along its length.
5. paper pilot unit according to claim 4, which is characterized in that
Centrally located guide rail section in the guide rail section for the multistage being partitioned into is connected to freely revolve relative to the extension
Turn.
6. paper pilot unit according to claim 4 or 5, which is characterized in that
The heat that the thermal expansion coefficient of centrally located guide rail section in the guide rail section for the multistage being partitioned into is less than other guide rail sections is swollen
Swollen coefficient.
7. paper pilot unit described according to claim 1~any one of 6, which is characterized in that
The end in the paper conveyance direction downstream side of the rail portion is provided with elongated elastomeric member.
8. paper pilot unit according to any one of claims 1 to 7, which is characterized in that
The end of the paper conveyance direction upstream side of the rail portion is provided with elasticity of compression component.
9. a kind of fixing device, which is characterized in that have paper pilot unit according to any one of claims 1 to 8.
10. a kind of image forming apparatus, which is characterized in that it is single to have paper guiding according to any one of claims 1 to 8
Member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337688.0A CN110389503A (en) | 2018-04-16 | 2018-04-16 | Paper pilot unit, fixing device and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337688.0A CN110389503A (en) | 2018-04-16 | 2018-04-16 | Paper pilot unit, fixing device and image forming apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110389503A true CN110389503A (en) | 2019-10-29 |
Family
ID=68283756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810337688.0A Pending CN110389503A (en) | 2018-04-16 | 2018-04-16 | Paper pilot unit, fixing device and image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110389503A (en) |
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