CN101344746A - Belt device and image forming apparatus - Google Patents
Belt device and image forming apparatus Download PDFInfo
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- CN101344746A CN101344746A CNA2008101360668A CN200810136066A CN101344746A CN 101344746 A CN101344746 A CN 101344746A CN A2008101360668 A CNA2008101360668 A CN A2008101360668A CN 200810136066 A CN200810136066 A CN 200810136066A CN 101344746 A CN101344746 A CN 101344746A
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- pressing element
- belting
- band
- transfer belt
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Abstract
The present invention discloses a belt device and an imaging device. A belt is supported by a plurality of rollers and is driven to move in a predetermined direction. A flange member is configured to make contact with a portion of an edge surface of the belt in its width direction. A pressing member presses on a surface of the belt in its thickness direction at a position near a contact portion of the belt with the flange member.
Description
Technical field
The present invention relates to be used in for example belting in duplicating machine, the Printers and Faxes machine of imaging device, more specifically to comprising as the belting of intermediate transfer unit and comprising the imaging device of belting.
Background technology
At typical imaging device for example in printer, duplicating machine, facsimile recorder and the printing machine, adopt the endless belt as latent image carrier, image transfer media or be used for for example transfer member of recording sheet of conveying recording medium.
This endless belt is usually by a plurality of roll support, and moved along predetermined direction by any driving in these rollers.
That is to say that the endless belt is by moving with the roller rubbing contact.At band just during movement, the band bending that causes owing to along the friction of the axial direction effect of roller, the inclination of axis etc. can take place.In this case, the bending of band refers to band by moving towards the either side skew of being with along the Width parallel with the axial direction of roller.
When forming coloured image, the toner image of multiple different colours is transferred on the intermediate transfer belt in proper order according to overlapping mode by the color-image forming apparatus that has adopted the intermediate transfer method.But if the intermediate transfer belt bending, then toner image can not be transferred on the predetermined transfer position on the intermediate transfer belt, therefore occurs for example colored alignment mistake of mistake in formed image.
In order to prevent that band is crooked, has developed the whole bag of tricks.For example, in the conventional art that in Jap.P. No.3523503, discloses, barrier structure is fixed on the back side of band integratedly in position near the end face of roller.If band is crooked, then barrier structure is run into the end face of roller.Therefore, can prevent with towards either side bias voltage along Width.
In addition, for example in the conventional art disclosed in Japanese Patent Application Publication instructions No.H05-204199, Japanese Patent Application Publication instructions No.2004-226746 and the Japanese Patent Application Publication instructions No.H11-161055, except aforesaid barrier structure, band constitutes so and is squeezed, thereby can prevent with towards the either side bias voltage along Width.
And, replace barrier structure, for example in the conventional art disclosed in Jap.P. No.3223771 and the Japanese Patent Application Publication instructions No.H05-134486, on two end faces of axial direction, be provided with flange so that prevent that band is crooked at roller.
In addition, have realized that in the imaging device that has adopted the intermediate transfer method, can be reduced in the scope that occurs the colour band registration error in the transfer process by the tensioning that increases intermediate transfer belt.This is because the friction force that produces between driven roller and intermediate transfer belt increases along with the band tensioning.Therefore, in conventional art, in order to ensure enough band tensionings, this draw roll that spring will be installed on two end is pressed on tape.
But in the method, the increase along with band stretches can be easy to produce these problems, promptly is with at its place, end to have crackle, perhaps roll coil of strip song.In addition, because the elastic stretching tolerance of each spring, so lateral deviation can occur with stretching.
For example, we can say, between intermediate transfer belt that stretches by the draw roll that the spring that spring with high limit of tolerance stretches is being installed on two end and the intermediate transfer belt that stretches by the draw roll that the spring that spring with low limit of tolerance stretches is being installed on two end, have band stretching difference.In addition, be installed on the end of draw roll and will have spring that the spring of the low limit of tolerance stretches when being installed on another end of draw roll, appear at the lateral excursion of band in stretching at the spring that the spring that will have the high limit of tolerance stretches.Spring has higher tolerance usually along with the spring pressure increase spring stretches.Therefore, even when for example preventing from the end of band, crackle to occur or roll coil of strip song occurring to guarantee that high-band stretches, the stretching lateral excursion still may occur significantly being with,, realizes by band by spring pressure because stretching by pressurization/decompression.And, if depart from (bending) of band just during movement occur along the displacement of Width or band at band, then this can cause damage to the end of band, and therefore comprises the belting of this band or comprise that the imaging device of this belting can be difficult to guarantee enough permanance.
In order to solve top problem, for example in the transfer device disclosed in the Jap.P. No.3523503, transfer belt is the endless belt by a plurality of roll support, and arrives transfer position according to the rotational motion of roller, and transfer printing is formed on the toner image on the image-carrier there.In transfer device, as mentioned above, in order to prevent the transfer belt bending, on two ends at the back side of transfer belt, be provided with barrier structure, thereby barrier structure is by the end face guiding of roller.In addition, the resistance with each barrier structure is set at identical with the resistance of transfer printing unit.In addition, in the ring belt type bogey disclosed in the Jap.P. No.3223771, other roller members except driven roller constitutes and can tilt.Therefore, the band skew can be proofreaied and correct to a kind of like this mode of either side bias voltage along the axial direction of roller members according to the contact pressure of each relative endless belt of roller members in the inclination angle by regulating each roller members.And in the endless belt disclosed in the Jap.P. No.3837246, guiding elements is located on the endless belt.In the endless belt when crooked, guiding elements is run into the end face of band backing roll or is located at flange on the end face of band backing roll.Therefore, can prevent the endless belt bending.
But, in the transfer device disclosed in the Jap.P. No.3523503, barrier structure must be installed on the heavy handled band back side, thereby reduce throughput rate.In addition, need on each backing roll that is supporting band respectively, form guide groove at each thicker relatively barrier structure.Therefore, the diameter of each backing roll increases, so the size of entire equipment also increases.In the ring belt type bogey disclosed in the Jap.P. No.3223771, band curved detection unit, roller slant correction unit etc. need be set.Therefore, it is complicated that the structure of this device becomes, and improved the production cost and the size of entire equipment.In the endless belt disclosed in the Jap.P. No.3837246, for example can cause producing the excessive biasing force of endless belt along the deviation of the axis direction of endless belt and the friction factor deviation among backing roll along Width owing to stretch at the position of related features among the backing roll, band.Therefore, be difficult to long-time stable keep preventing with the deflection deformation of end.
In addition, flange be located at roller on two end faces of axial direction with in preventing with crooked this structure, though the impact that is produced in the time of can avoiding the collision of barrier structure on being located at the back side of band and roller end face, the also following other problem of existence.
If location tolerance or among the roller that is supporting band owing to the axis tilt of each roller causes occurring then applying excessive biasing force along Width on tape with the deviation of stretching along the roller axial direction.In addition, at each roller along not producing excessive biasing force aspect the friction factor of axial direction simultaneously.
At band when Width is subjected to excessive bias voltage and runs into flange, the band deflection.If the band this state continuance long period of deflection, then Dai permanance suffers damage.Consider the permanance of band, can adopt the high tenacity band; But cost increases in this case.
And, can solve top problem by pressing element is installed.Just adopt pressing element, can reduce the size of equipment and reduce cost, and can not reduce throughput rate.But, in this case, such problem can appear, and promptly the toner that leaks out from the end of the cleaning unit that is used to clean intermediate transfer belt is deposited on this pressing element, and the toner of deposition spreads in equipment.Therefore, because comprise the toner contamination that this device interior of intermediate transfer belt is spread, so power supply trouble can occur, perhaps because the toner contamination that the light receiving unit of toner mark sensor (toner-mark sensor) is spread, so imaging device can not be controlled image color or imaging process.
Summary of the invention
The objective of the invention is to small part solution those problems in conventional art.
According to an aspect of the present invention, provide a kind of belting, this belting comprises: band, described band are by a plurality of roll support and be driven along predetermined direction and move; Flange member, this flange member constitute and contact with a part of edge surface along its Width; And pressing element, be used on belt surface, pressurizeing along the thickness direction of being with near the position the contact portion that flange member contacts near band.
In addition, according to another aspect of the present invention, provide a kind of imaging device, this imaging device comprises belting, and this belting comprises: band, described band are by a plurality of roll support and be driven along predetermined direction and move; Flange member, this flange member constitute and contact with a part of edge surface along its Width; And pressing element, be used on belt surface, pressurizeing along the thickness direction of being with near the position the contact portion that flange member contacts near band.
Read the detailed description of following currently preferred embodiment of the present invention in conjunction with the drawings and will understand top and other purpose, feature, advantage and technology and industrial conspicuousness of the present invention better.
Description of drawings
Fig. 1 is the side view according to the imaging device that comprises belting of first embodiment of the invention;
Fig. 2 is the fragmentary, perspective view at the belting shown in Fig. 1, is used to illustrate the embodiment of anti-band bending mechanism;
Fig. 3 is the partial elevation view at the belting shown in Fig. 2;
Fig. 4 is the partial elevation view of belting, is used to illustrate the anti-deflection deformation mechanism that is located on the belting shown in Figure 3;
Fig. 5 is the partial side view of belting, is used to illustrate the installation site at the pressing element shown in Fig. 4;
Fig. 6 comprises the partial front elevation view of conduct at the belting of the pressing element of the improvement embodiment shown in Fig. 4;
Fig. 7 comprises the partial front elevation view of conduct at the belting of the pressing element of the improvement embodiment shown in Fig. 6;
Fig. 8 is the front elevation according to the belting of first embodiment of the invention, is used to illustrate the embodiment of the supporting construction that is used to support pressing element;
Fig. 9 is the front elevation that comprises as the belting of the supporting construction of improving embodiment at first shown in Fig. 8;
Figure 10 is the front elevation that comprises as the belting of the supporting construction of improving embodiment at second shown in Fig. 8;
Figure 11 comprises the front elevation of conduct at the belting of the supporting construction of the improvement embodiment shown in Figure 10;
Figure 12 comprises the front elevation of conduct at the belting of the supporting construction of the improvement embodiment shown in Figure 11;
Figure 13 comprises the partial side view of conduct at the belting of the pressing element of the improvement embodiment shown in Figure 12;
Figure 14 comprises the partial side view of conduct at the belting of the pressing element of the improvement embodiment shown in Fig. 5;
Figure 15 is included in the supporting construction shown in Figure 11 and as the front elevation at the belting of the pressing element of the improvement embodiment shown in Figure 14;
Figure 16 is the front elevation at the belting of the pressing element shown in Fig. 7 that comprises as at the improvement embodiment shown in Figure 15;
Figure 17 comprises the partial side view of conduct at the belting of the pressing element of the improvement embodiment shown in Figure 14;
Figure 18 A is the front elevation at the belting shown in Fig. 8, is used to illustrate the installation site of the support element that supports pressing element;
Figure 18 B and 18C are the side view that is included in the imaging device of the belting shown in Figure 18 A, are used to illustrate the situation of wherein from imaging device unit TU being removed;
Figure 19 A is the front elevation of belting, and the support element that wherein will support pressing element is installed in on the different position shown in Figure 18 A;
Figure 19 B and 19C are the side view that is included in the imaging device of the belting shown in Figure 19 A, are used for illustrating the situation of wherein from imaging device unit TU being removed;
Figure 20 is the partial elevation view at the belting shown in Fig. 4, is used to illustrate the embodiment of the supporting construction of pressing element;
Figure 21 improves the partial elevation view of the belting that comprises supporting construction of embodiment at first shown in Figure 20 for conduct;
Figure 22 improves the partial elevation view of the belting that comprises supporting construction of embodiment at second shown in Figure 20 for conduct;
Figure 23 is imaging device and the fragmentary, perspective view that is included in the pressing element shown in Fig. 4, is used to illustrate the installation site of toner mark detecting sensor;
Figure 24 is the front elevation at belting shown in Figure 23 and toner mark detecting sensor installation component;
Figure 25 is that conduct is at the belting of the improvement embodiment shown in Figure 24 and the front elevation of toner mark detecting sensor installation component;
Figure 26 is the partial plan layout according to the belting of second embodiment of the invention;
Figure 27 is the planimetric map that comprises as the belting of the pressing element that improves embodiment at first shown in Figure 26, is used to illustrate the relative position between the cleaning balde of pressing element and intermediate transfer belt cleaning unit;
Figure 28 improves the fragmentary, perspective view of the belting that comprises pressing element of embodiment at second shown in Figure 26 for conduct;
Figure 29 is as the partial elevation view of improving the belting of embodiment at first shown in Figure 26;
Figure 30 is as the partial elevation view of improving the belting of embodiment at second shown in Figure 26; And
Figure 31 is as the partial elevation view of improving the belting of embodiment at the 3rd shown in Figure 26.
Embodiment
With reference to these accompanying drawings exemplary of the present invention is elaborated below.
Fig. 1 is the side view that comprises according to the color-image forming apparatus of the belting of first embodiment of the invention.This imaging device uses band as offset medium.The toner image of a plurality of different colours is transferred in proper order according to overlapping mode and is with, and forms coloured image thus.
In Fig. 1, Reference numeral is represented the cylindrical shape photosensitive drums as latent image carrier.Photosensitive drums 1 diameter is 24 millimeters (mm), and rotates with the peripheral speed of 120mm/s.
By the high-voltage power supply (not shown) direct current (DC) bias voltage or the DC bias voltage that is superimposed with exchange current (AC) on it are applied on the charhing unit 2, do not have for photosensitive drums 1 equably with the surface potential of-500 volts (V) thus.
After giving photosensitive drums 1 uniform charging, the exposing unit 3 that forms the unit as sub-image makes the surface of photosensitive drums 1 be exposed to the laser corresponding with view data, forms electrostatic latent image thus on photosensitive drums 1.
As exposing unit 3, adopt the laser beam scanner that has used laser diode (LD) or light emitting diode (LED).
In Fig. 1, Reference numeral 4 expression single component contact developing cells.Apply predetermined development bias voltage by the high-voltage power supply (not shown) to developing cell 4.By this development bias voltage, it is toner image that developing cell 4 makes the latent electrostatic image developing that is formed on the photosensitive drums 1.In the current embodiment, in developing cell 4, include 180 gram (g) monocomponent toners at the beginning.
Optionally, can also use bi-component developing cell or contactless developing cell.
In Fig. 1, Reference numeral 10 expressions wherein include the processing unit of photosensitive drums 1, charhing unit 2 and developing cell 4 integratedly.
In imaging device, four processing units are arranged in parallel to each other.In the time will forming coloured image, these processing units 10 form black (K), yellow (Y), magenta (M) and cyan (C) toner image respectively.K, the Y, M and the C toner image that are formed on the photosensitive drums 1 by processing unit 10 are transferred on the intermediate transfer belt that contacts with photosensitive drums 1 according to overlapping mode order successively, form coloured image thus.
Draw roll 20 is that 19mm and width are the tubular aluminum roller of 231mm for diameter.Shown in Fig. 2 and 3, on two end faces of draw roll 20, be press-fitted the flange 26 that diameter is 22mm, its diameter is greater than the external diameter of draw roll 20.If intermediate transfer belt 15 bendings, then intermediate transfer belt 15 is met on any flange 26 along the edge surface of Width, has prevented intermediate transfer belt 15 bendings thus.By the way, intermediate transfer belt 15 is along in the arrow direction shown in Fig. 2.
As driven roller 21, for example can adopt by Desmocoll (thickness be 0.3 to 1mm) or be coated with the roller of thin layer (thickness is 0.03mm to 0.1mm).In the current embodiment, because along with the vary in diameter of temperature is less, so can adopt the roller (diameter is 19mm) that is coated with urethanes (thickness is 0.05mm) as driven roller 21.
As first transfer roll 5, for example can adopt conduction scraper plate, conductive sponge roller or metallic roll.In the current embodiment, adopting diameter is the first transfer roll 5 of metallic roll conduct of 8mm.It is relative with corresponding photosensitive drums 1 that each first transfer roll 5 is arranged to stride across intermediate transfer belt 15, thereby the journal offset 8mm of the central axial line of first transfer roll 5 along the direction of motion of intermediate transfer belt 15 from photosensitive drums 1, and 1 bottom upwards is offset 1mm along vertical direction from photosensitive drums at the top of first transfer roll 5.
Stride across each relative first transfer roll 5 of intermediate transfer belt 15 and corresponding photosensitive drums 1 jointly by single high-voltage power supply (not shown) apply+500V is to the predetermined transfer bias of+1000V.By applying transfer bias, between each first transfer roll 55 and each photosensitive drums 1, form transfer electric field by intermediate transfer belt 15.Therefore, the toner image that is formed on each photosensitive drums 1 is electrostatically transferred on the intermediate transfer belt 15.
As shown in Figure 1, imaging device also comprises toner mark detecting sensor 17.Toner mark detecting sensor 17 detects the toner mark that is formed on the intermediate transfer belt 15.The toner mark is used for checking toner concentration or definite transfer position.Toner mark detecting sensor 17 is direct reflection optics sensor or diffuse reflection optics sensor, and is installed near the toner mark detecting sensor installation component 17A that is arranged in the draw roll 20.Result according to being detected by toner mark detecting sensor 17 controls image color or color registration (position alignment).
In Fig. 1, Reference numeral 32 expression intermediate transfer belt cleaning units.This intermediate transfer belt cleaning unit 32 comprises cleaning balde 31, and cleans intermediate transfer belt 15 by the transfer printing residual toner being wiped off from middle transfer belt 15 with cleaning balde 31.
In the current embodiment, as cleaning balde 31, adopting by thickness is that Desmocoll and the hardness of 1.5mm to 3mm is the scraper plate that 65 degree are made to the rubber of 80 degree.Cleaning balde 31 is arranged to contact with intermediate transfer belt 15 along the direction opposite with the direction of motion of intermediate transfer belt 15.The transfer printing residual toner that is struck off is contained in the waste-toner container 33 by used toner passage (not shown).
When the assembling imaging device, apply for example zinc stearate of lubricant to the marginal portion of a part of cleaning balde 31 corresponding and cleaning balde 31 with the cleaning gap portion that is formed on the intermediate transfer belt 15 between cleaning balde 31 and the clearer 16.Therefore, can prevent cleaning balde 31 ride up at cleaning gap portion place (ridden up).In addition, form the restraining barrier by lubricant at cleaning gap portion place, thereby can improve clean-up performance.
Two end faces that supporting the roller of intermediate transfer belt 15 are supported by the both sides of edges of side plate (not shown) from middle transfer belt 15 respectively.
As intermediate transfer belt 15, can adopt by conductive material wherein for example carbon black be dispersed in the endless belt of making in the resin film of for example Kynoar (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), polyimide (PI), polycarbonate (PC), thermoplastic elastomer (TPE) etc.In the current embodiment, adopt that to have the single layer structure that wherein carbon black joined among the TPE and its stretch modulus be that 1000Mpa to 2000Mpa, thickness be 90 microns (μ m) to 160 μ m and width are that the band of 230mm is as intermediate transfer belt 15.
In temperature is that 23 ℃ and relative humidity are that the volume resistance of intermediate transfer belt 15 is preferably 10 under 50% the condition
8Ω cm to 10
11In the scope of Ω cm, and the surface resistivity of intermediate transfer belt 15 is preferably 10
8Ω/sq to 10
11Ω/sq (these two measured values are to use the Hiresta-UP MCP-HTP450 that made by MitsubishiChemical company to provide applying under the 500V voltage condition in 10 seconds).
During scope on the specific insulation of intermediate transfer belt 15 and surface resistivity both surpass, give intermediate transfer belt 15 chargings.Therefore, towards downstream when motion that the toner image order is transferred to intermediate transfer belt 15, need to set higher predeterminated voltage at intermediate transfer belt 15.Therefore, single high-voltage power supply is difficult to provide suitable voltage to each first transfer roll 5.This is because the charging potential on the surface of intermediate transfer belt 15 increases along with the discharge that occurs in transfer process or offset medium detachment process, thereby intermediate transfer belt 15 is difficult to self discharge.In order to address this problem, the electric unit that removes that is used for removing electric charge from middle transfer belt 15 must be set.On the other hand, drop to scope above being lower than, then quickened the reduction of charging potential, thereby intermediate transfer belt 15 is difficult to self discharge the specific insulation of intermediate transfer belt 15 and surface resistivity both.But, in this case, thus when toner image is transferred on the intermediate transfer belt 15 since electric current surfacewise the direction toner that flows scatter.Therefore, in the preferred superincumbent scope of the specific insulation of intermediate transfer belt 15 and surface resistivity.
In Fig. 1, Reference numeral 25 expression secondary transfer roller.Secondary transfer roller 25 is a kind of like this roller, wherein uses to be adjusted to by conductive material to have 10
6Ω to 10
10The elastic medium of the resistance of Ω for example urethanes to apply the diameter for example made by stainless steel (SUS) be the metal mandrel of 6mm, thereby this secondary transfer roller 25 forms diameter with 19mm and the width of 222mm.Specifically, can adopt ionic conduction roller (by the urethanes that wherein is dispersed with carbon, nitrile rubber (NBR) and epichlorohydrin rubber), electronic conduction roller (making) etc. as secondary transfer roller 25 by ethylene-propylene-diene rubber (EPDM).In the current embodiment, adopting its Asker C hardness is that 35 degree to 50 degree and diameter are that the urethanes roller of 19mm is as secondary transfer roller 25.During scope on the resistance of secondary transfer roller 25 surpasses, be difficult to make enough electric currents to flow into secondary transfer roller 25.Therefore,, must apply higher voltage, therefore increase the power supply cost to secondary transfer roller 25 in order to obtain enough transfer efficiencies.In addition,, in the space around the transfer printing gap portion, discharge occurred, thereby because this discharge produces white point at half tone image by applying higher voltage.This defective mainly occurs (being that 10 ℃ and relative humidity are under 15% the condition in temperature for example) under low temperature and the low humidity condition.On the other hand, the resistance of secondary transfer roller 25 drop to be lower than above scope, then for will being formed on coloured image (for example three looks overlapping toner image) on the same sheet and monochrome image, can not realize enough transfer efficiencies.This is because the resistance of secondary transfer roller 25 is lower, thereby can flow through enough electric currents so that transfer printing needs the monochrome image of relatively low voltage.But, the voltage that the transfer printing of coloured image need be higher than the voltage that is applicable to monochrome image.If voltage is set at is applicable to coloured image, then the electric current of flowing through for the transfer printing monochrome image is excessive, causes the transfer efficiency of monochrome image to descend thus.
By the way, be installed in secondary transfer roller 25 on the conductive metal sheet and applying the resistance of measuring secondary transfer roller 25 under the situation of load of 4.9N to the two ends of plug.According to flowing into the resistance that wherein electric current obtains secondary transfer roller 25 on the part that is applied at voltage between plug and the sheet metal with 1kV.
For example in the paper box offset medium 22 is housed at accomodating unit.The time synchronized ground that offset medium 22 is come the secondary transfer printing position by paper feed roller 23 and a pair of registration roller 24 and the front end that is formed on intermediate transfer belt 15 lip-deep toner images supplies from accomodating unit.Apply predetermined transfer bias by the high-voltage power supply (not shown) to offset medium 22, from middle transfer belt 15 toner image is transferred on the offset medium 22 thus.Imaging device according to current embodiment adopts longitudinally extending channels as the sheet material passage.By the bending that utilizes secondary transfer printing driven roller 21 offset medium 22 is separated with intermediate transfer belt 15.After the toner image photographic fixing thereon that will be transferred to by fixation unit 40 on the offset medium 22, from imaging device, offset medium 22 is discharged.
In the current embodiment, fixation unit 40 constitutes the type change processing speed according to offset medium 22.Specifically, has 100g/m at offset medium 22
2Or during bigger basic weight, compare with normal process speed processing speed is reduced by half.That is to say, compare that offset medium 22 needs the time of twice to pass to be formed on the fusing nip between a pair of fixing roller that is included in the fixation unit 40 with the situation of normal process speed.Therefore, can with toner image reliably photographic fixing on offset medium 22.
In having the imaging device of this structure, when intermediate transfer belt 15 bendings, intermediate transfer belt 15 is run into the flange 26 on the end face that is located at draw roll 20 along the edge surface of Width.Therefore, can prevent intermediate transfer belt 15 bendings.In the current embodiment, be provided with of the deflection deformation of anti-deflection deformation mechanism with the intermediate transfer belt 15 that prevents from when the edge surface of intermediate transfer belt 15 is run into flange 26, may occur.
Fig. 4 is the part front elevation that is used to illustrate the belting of this anti-deflection deformation mechanism.As anti-deflection deformation mechanism, the pressing element 50A that is supported by support 51 is located near the position intermediate transfer belt 15 and the flange 26 adjacency parts that contact.The thickness direction of this pressing element 50A from the face side of middle transfer belt 15 (that is, intermediate transfer belt 15 and photosensitive drums 1 facing surfaces side) along intermediate transfer belt 15 is pressed on the intermediate transfer belt 15, prevented to occur the fluctuating of intermediate transfer belt 15 thus.
As shown in Figure 5, pressing element 50A strides across intermediate transfer belt 15 and is arranged in the upstream side of a part of intermediate transfer belt 15 that intermediate transfer belt 15 wherein just in time contacts with the external peripheral surface of draw roll 20 along the rotation direction of draw roll 20 in the face of being pressed in pressing element 50A on the intermediate transfer belt 15 under draw roll 20 states therein.In other words, pressing element 50A be positioned at can on the intermediate transfer belt 15 pressurization the side on so that apply tensile force to intermediate transfer belt 15.Therefore, can prevent that deflection deformation from appearring in the extensional surface of intermediate transfer belt, wherein when the stretching of intermediate transfer belt 15 changes, occur deflection deformation easily.
Fig. 6 comprises the partial side view of conduct at the belting of the pressing element 50B of the improvement embodiment of the pressing element shown in Fig. 4.This pressing element 50B is made of the roller that can roll under situation about being pressed on the intermediate transfer belt 15.
In the belting shown in Fig. 6, axle 51A is supported by support 51 rotationally, and so passes pressing element 50B, thereby pressing element 50B can roll.Pressing element 50B rolls along with the motion of intermediate transfer belt 15.Pressing element 50B is made by for example slide POM or slip ABS of the resin with high sliding capability, so that can not hinder the motion of intermediate transfer belt 15.The horizontal width that the pressing surfaces of pressing element 50B contacts with intermediate transfer belt 15 is 2mm to 5mm.
Fig. 7 comprises the partial side view of conduct at the belting of the pressing element 50C of the improvement embodiment of the pressing element shown in Fig. 6.This pressing element 50C is made of the roller that can roll under situation about being pressed on the intermediate transfer belt 15.Pressing element 50C is supported by support 51 ' rotationally.Pressing element 50C for example is pressed on the surface of intermediate transfer belt 15 under the effect of spring being used for the elastic medium 52 of extrusion rack 51 '.Pressing element 50C is made by for example slide POM or slip ABS of the resin with high sliding capability.The horizontal width that the pressing surfaces of pressing element 50C contacts with intermediate transfer belt 15 is 2mm to 5mm.Plus-pressure by the 1N to 10N that applied by elastic medium 52 is pressed in pressing element 50C on the intermediate transfer belt 15.
Like this, in the current embodiment, pressing element can prevent thus that near the face side from middle transfer belt 15 is pressed in along thickness direction on the intermediate transfer belt 15 in abutting connection with the position of the edge surface of that part of intermediate transfer belt 15 that contact with the flange 26 of draw roll 20 deflection deformation from appearring in the intermediate transfer belt 15 that contacts with flange 26 adjacency.Specifically, pressing element can not be used for preventing that the rising behavior owing to intermediate transfer belt 15 from causing occurring the gap, but is used for preventing that the deflection deformation behavior from appearring in intermediate transfer belt 15, comprises the rising behavior.Therefore, can prevent that the stress that occurs is concentrated when suppressing intermediate transfer belt 15 along the Width deflection.Therefore, the permanance that can prevent intermediate transfer belt 15 reduces.
Pressing element constitutes and intermediate transfer belt 15 sliding contacts, thereby pressing element 15 can be pressed on the intermediate transfer belt 15, thereby can not hinder the motion of intermediate transfer belt 15.Therefore, compare with only intermediate transfer belt 15 being pressed down with this situation that prevents intermediate transfer belt 15 bendings, can prevent intermediate transfer belt 15 bendings.Therefore, can accurately toner image be transferred on the intermediate transfer belt 15, thereby can prevent owing to for example color registration error causes occurring defective image according to overlapping mode.
Fig. 8 is the front elevation of belting, is used to illustrate the embodiment of the supporting construction that is used to support pressing element 500.In the embodiment shown in Fig. 8, pressing element 500 is supported by support element 500A, and support element 500A is installed on the fixed part 501.By the way, fixed component 501 was arranged with draw roll 20 and intermediate transfer belt in 15 minutes.
In the current embodiment, the side plate of imaging equipment body is as fixed component 501.Pressing element 500 is integral with support element 500A.Support element 500A is installed in the side plate that is provided with along the Width of intermediate transfer belt 15 two or any.
The structure of pressing element 500 is with identical in the structure of any pressing element shown in Fig. 4 to 6.In other words, pressing element 500 with respect to the size of the installation site of intermediate transfer belt 15 and the pressing surfaces of pressing element 500 with identical at those of any pressing element shown in Fig. 4 to 6.
Optionally, as shown in Figure 9, support element 500A can be removably mounted on the fixed component 501.In other words, can move with support element 500A all-in-one-piece pressing element 500 and leave intermediate transfer belt 15.Therefore, when needing to change pressing element 500, from fixed component 501, will remove with pressing element 500 all-in-one-piece support element 500A owing to wearing and tearing, and more renew.In other words, the part that to change can be just removed, thereby the part of new installation can be reduced.Therefore, can reduce production costs.Optionally, support element 500A as shown in fig. 10 can be integrally molded with fixed component 501.In the situation shown in Figure 10, pressing element 500 is installed on the support element 500A.Support element 500A and fixed component 501 are integrally molded, thereby pressing element 500 can pressurize on the surface of intermediate transfer belt 15.In this case, support element 500A and fixed component 501 can be formed by same material, therefore can reduce production costs.
Figure 11 comprises the front elevation of conduct at the belting of the supporting construction of the improvement embodiment of the supporting construction shown in Figure 10.In the situation shown in Figure 11,, for example spring of elastic component 502 is set between support element 500A and pressing element 500 in order to exert pressure to pressing element 500.Specifically, an end of elastic component 502 be installed in the integrally molded support element 500A of fixed component 501 on, and another end of elastic component 502 is installed on the pressing element 500.In this structure, pressing element 500 can move along the thickness direction of intermediate transfer belt 15.In addition, by utilizing the restoring force of elastic component 502, pressing element 500 can be pressed on the surface of intermediate transfer belt 15 always, and causes on the surface of intermediate transfer belt 15 and the gap between the pressing element 500 what variation being arranged regardless of for example degree of eccentricity owing to draw roll 20.Therefore, can prevent that deflection deformation from appearring in intermediate transfer belt 15.
Figure 12 comprises the front elevation of conduct at the belting of the supporting construction of the improvement embodiment of the supporting construction shown in Figure 11.In the situation shown in Figure 12, but an end of tensile elasticity member 502 is directly installed on the fixed component 501, and another end of elastic component 502 promptly is installed on the pressing element 500 along the axial direction of draw roll 20 along the direction vertical with the thickness direction of intermediate transfer belt 15.Therefore, though for example at draw roll 20 when axial direction moves, pressing element 500 can be in pressurization always on the surface of intermediate transfer belt 15 by the restoring force that utilizes elastic component 502 in the position near flange 26.
Draw roll 20 occurs along moving under such condition of axial direction, and promptly draw roll 20 is a rolling member, and is fixed in the supporting member 20A of the draw roll 20 in flange 26 outsides.In this case, between supporting member 20A and flange 26, form gap a little, thus supporting member 20A and not mutual friction mutually of flange 26.When the external force that is produced by intermediate transfer belt 15 bendings was applied on the draw roll 20, draw roll 20 can move along axial direction.
Even when axial direction moved, the biasing force that pressing element 500 also can be by utilizing elastic component 502 was along with moving together of draw roll 20 moved at draw roll 20.Therefore, pressing element 500 can be positioned at identical position with respect to draw roll 20 always.In other words, pressing element 500 can be positioned at the position that wherein occurs the deflection deformation of intermediate transfer belt 15 easily.Therefore, can prevent that deflection deformation from appearring in intermediate transfer belt 15.
Figure 13 comprises the partial side view of conduct at the belting of the pressing element of the improvement embodiment of the pressing element shown in Figure 12.In the situation shown in Figure 13, replace pressing element 500 to be provided with elastic pressurizing element 505.In the time of on the circular arc portion that this pressing element 505 is pressed in the intermediate transfer belt 15 that intermediate transfer belt 15 wherein supports by draw roll 20 by elastic component 502, pressing element 505 is along the curved surface and intermediate transfer belt 15 Elastic Contact of draw roll 20.Therefore, even so that the stretching of intermediate transfer belt 15 when stablize, pressing element 505 also can be pressed on a part of intermediate transfer belt 15 of the deflection deformation that wherein occurs intermediate transfer belt 15 along with the shaft core position variation of draw roll 20 easily at the shaft core position that changes draw roll 20 always.Therefore, can prevent that deflection deformation from appearring in intermediate transfer belt 15.
Figure 14 comprises the partial side view of conduct at the belting of the pressing element of the improvement embodiment of the pressing element shown in Fig. 5.In the situation shown in Figure 14, pressing element 50A is not directly supported by support 51, but is supported by support 51 by elastic component 502, thus pressing element 50A can with intermediate transfer belt 15 Elastic Contact.Therefore, according to in the identical mode shown in Fig. 5, can prevent that deflection deformation from appearring in that part of intermediate transfer belt 15 that wherein occurs the deflection deformation of intermediate transfer belt 15 when the stretching of intermediate transfer belt 15 changes easily.And, even when the shaft core position of draw roll 20 changes, also can keep being pressed on the intermediate transfer belt 15 at the pressing element 50A shown in Figure 14.
Figure 15 is included in the supporting construction shown in Figure 11 and as the front elevation at the belting of the pressing element of the improvement embodiment of the pressing element shown in Figure 14.In the situation shown in Figure 15, pressing element 50A is supported by the support element 500A that is wholely set on fixed component 501 by elastic component 502, and pressing element 50A and intermediate transfer belt 15 Elastic Contact.The pressing surfaces 50A10 of pressing element 50A on the lip-deep pressure side of intermediate transfer belt 15 made by for example slide sponge or felt of the member with sliding properties, so that can not hinder the motion of intermediate transfer belt 15.Therefore, can reduce sliding resistance, and can prevent that the surface of intermediate transfer belt 15 is impaired owing to contacting with pressing element 50A.
Figure 16 is the front elevation at the belting of the pressing element shown in Fig. 7 that comprises as at the pressing element shown in Figure 15.In the situation shown in Figure 16, pressing element 50C is made of roller and is supported by support 51 '.Support 51 ' is suspended on the support element 500A by elastic component 52 (corresponding with the elastic component 502 in Figure 15).In this case, support 51 ' constitutes and can move up and down.Pressing element 50C at next vertical compression of partial pressure of elastic component 52 on the surface of intermediate transfer belt 15.Therefore, according to in mode identical shown in Fig. 7, pressing element 50C can roll being pressed under the lip-deep situation of intermediate transfer belt 15.Therefore, can prevent intermediate transfer belt 15 variation and damage.
Figure 17 comprises the partial side view of conduct at the belting of the pressing element of the improvement embodiment shown in Figure 14.In the situation shown in Figure 17, pressing element 50A is latchable on the rib 50A1.The a part of rib 50A1 that stretches out vertically downward on the downstream of the rotation direction of draw roll 20 at pressing element 50A contacts with intermediate transfer belt 15.Therefore, rib 50A1 can be used for preventing that the pressing element 50A that contacts with intermediate transfer belt 15 from moving along with the motion of intermediate transfer belt 15, and is used for preventing that pressing element 50A from changing its pressing position with respect to intermediate transfer belt 15.Therefore, pressing element 50A can be pressed on a part of intermediate transfer belt 15 of the deflection deformation that wherein occurs intermediate transfer belt 15 easily always, has prevented intermediate transfer belt 15 deflection deformations thus.
Figure 18 A to 18C is the synoptic diagram of imaging device, is used for illustrating the situation of wherein from imaging device unit TU being removed.In this case, the support element 500A that is supporting pressing element 500 is installed on the fixed component 501.Intermediate transfer belt 15 is included among the unit TU with the supporting member 200 of draw roll 20 and draw roll 20.Unit TU is removably mounted in the imaging device.
In this structure, supporting the support element 500A of pressing element 500 and the dismounting of unit TU and irrespectively be installed on the fixed component 501.Therefore, when from imaging device unit TU being removed, shown in Figure 18 C, pressing element 500 can not hinder processing unit 10.
On the other hand, if supporting the support element 500A of pressing element 500 equally is installed in shown in Figure 19 A on the supporting member 200 of draw roll 20, then when will be from imaging device unit TU being removed, pressing element 500 the same and processing unit 10 interference shown in Figure 19 C.Therefore, can not from imaging device, unit TU be removed.Like this, pressing element 500 preferred with comprise that the unit TU of intermediate transfer belt 15, draw roll 20 and supporting member 200 is installed separately on fixed component.
By the way, in the structure shown in Figure 19 A to 19C, in the time will being installed in unit TU in the imaging device or therefrom removing, can adopt following method.After from imaging device, processing unit 10 being removed, from imaging device, unit TU is removed.As another kind of method, unit TU is moved avoiding and processing unit 10 is interfered according to a kind of like this mode, that is, TU pulls down with the unit, thus pressing element 500 can not interfere with processing unit 10, from imaging device, unit TU is removed then.On the other hand, in the time will being installed in unit TU in the imaging device,, unit TU be arranged on processing unit 10 belows, makes it to rise to reference position then according to opposite order.In addition, as another kind of method, be the direction vertical with the accompanying drawing paper with the direction setting of attaching/detaching unit TU.
Subsequently, describe with reference to Figure 20 to 22 couple of improvement embodiment that is used for the supporting construction of pressing element below.
In the situation shown in Figure 20, the support 51 that will be used to support pressing element 50A is installed in the fixed component that was arranged in 15 minutes with draw roll 20 and intermediate transfer belt as movable link.Specifically, an end of support 51 is installed in is positioned at flange 26 outsides so that cross on the flange 26 draw roll bearing 53 relative with the edge surface of intermediate transfer belt 15.In the state of support 51 on the flange 26, support 51 extends between draw roll bearing 53 and intermediate transfer belt 15 sides, thereby pressing element 50A can be pressed on the surface of intermediate transfer belt 15.
In the situation shown in Figure 21, the turning axle of draw roll 20 is supported by the side plate corresponding with fixed component 503.An end supporting the support 51 of pressing element 50A is installed on the side plate 503.In the state of support 51 on the flange 26, support 51 extends between side plate 503 and intermediate transfer belt 15 sides, thereby pressing element 50A can be pressed on the surface of intermediate transfer belt 15.
In the situation shown in Figure 22, flange 26 does not constitute and moves along with the rotation of draw roll 20, and promptly flange 26 is fixed.An end supporting the support 51 of pressing element 50A is installed on the flange 26.
Above adopting in the supporting construction any, pressing element can be arranged to be pressed on the incidental a part of intermediate transfer belt 15 of torsional deformation of intermediate transfer belt, promptly with flange 26 near a part of edge surface of the intermediate transfer belt that contacts.Therefore, draw roll 20 and intermediate transfer belt 15 can constitute the assembly that is included among the unit TU.
Structure according to fixed component can adopt any above-mentioned supporting construction.
Figure 23 is the fragmentary, perspective view of imaging device and belting, is used to illustrate the installation site at the toner mark detecting sensor 17 shown in Fig. 1.In Figure 23, toner mark detecting sensor 17 is installed on the toner mark detecting sensor installation component 170, thereby toner mark detecting sensor 17 can detect the toner mark that is formed on the intermediate transfer belt 15.
In this case, pressing element is installed on the toner mark detecting sensor installation component 170.
Figure 24 is the front elevation at the belting shown in Figure 23, is used to illustrate the embodiment of the installation site of the pressing element 50A that is being supported by support 51.In the embodiment shown in Figure 24, pressing element 50A is arranged on the toner mark detecting sensor installation component 170 according to following mode, that is, pressing element 50A lay respectively at each end face that is located at draw roll 20 along axial direction on flange 26 (not shown in Figure 24) near the edge surface of the intermediate transfer belt 15 that contacts.
Toner mark detecting sensor installation component 170 is subjected to the bias voltage of elastic component 502 respectively along two end faces of the axial direction of draw roll 20, make lip-deep each the pressing element 50A that is pressed in intermediate transfer belt 15 can remain on the same position place, and can not move along the axial direction of draw roll 20.
Figure 25 is that conduct is at the belting of the improvement embodiment of the embodiment shown in Figure 24 and the front elevation of toner mark detecting sensor installation component.In Figure 25, on toner mark detecting sensor installation component 170, be formed with two longitudinal grooves, thereby can regulate the installation site of each pressing element 50A.Longitudinal groove 170A forms parallel with the axial direction of draw roll 20.
Each support 51 that is supporting pressing element 50A is assemblied among the corresponding longitudinal groove 170A.Support 51 can move in longitudinal groove 170A, thereby the position adjustments of pressing element 50A the position of deflection deformation can be occurred easily for intermediate transfer belt 15 wherein.Therefore, even when making this equipment, also can in the scope of longitudinal groove 170A, regulate the position of each pressing element 50A with respect to intermediate transfer belt 15 with slight dimensional accuracy error.Therefore, can prevent that deflection deformation from appearring in intermediate transfer belt 15.
This structure also goes for such situation, and wherein toner mark detecting sensor installation component 170 is as the unit that pressing element will be installed on it.
The same with as shown in 6 those as Fig. 4, pressing element must not only constitute on the surface of intermediate transfer belt 15 and slide, but also will stop moving of intermediate transfer belt 15.
Belting according to current embodiment is applicable to aforesaid intermediate transfer belt.In addition, belting can be applied to as the band of latent image carrier or be used for the band of conveying recording medium.
Subsequently, will the belting according to second embodiment of the invention be described below.Represent with identical Reference numeral with those identical parts of first embodiment, and the explanation of those parts will be omitted.
Figure 26 is the partial plan according to the belting of second embodiment.As shown in figure 26, belting comprises the pressing element 50D that narrows down gradually towards the medial side of intermediate transfer belt 15, thereby the toner that is deposited on the pressing element 50D can advance in the medial side of intermediate transfer belt 15 gradually.In other words, surpass the medial side that a certain amount of toner flows to intermediate transfer belt 15.Therefore, toner is difficult to be deposited on the pressing element 50D, can prevent that thus toner from scattering.
The pressing surfaces that is pressed in the pressing element 50D on the intermediate transfer belt 15 is 2mm to 5mm along the horizontal width of Width, because must on intermediate transfer belt 15, stay the space of 210mm, and stay 216mm for the horizontal width of letter paper specification sheet material for the horizontal width of A4 specification sheet material.Therefore, can under situation about can not interfere with image-region, prevent that deflection deformation from appearring in intermediate transfer belt 15, and can realize for a long time that band drives reliably.
Figure 27 is the planimetric map that comprises as the belting of the pressing element 50E that improves embodiment at first of the pressing element shown in Figure 26, is used to illustrate the relative position of the cleaning balde 31 of pressing element 50E and intermediate transfer belt 32.As shown in figure 27, pressing element 50E arranges in such a way, thereby the tapered end of pressing element 50E is positioned at image-region 60 outsides of letter paper specification sheet material, and is positioned on the inboard, end of cleaning balde 31.Therefore, the toner that is deposited on the pressing element 50E can flow in the medial side of intermediate transfer belt 15, and is collected again by cleaning balde 31.
Specifically, the tapered end of pressing element 50E is positioned at image-region 60 outsides, thereby can reduce such possibility, and promptly toner contacts or is deposited on the flange 26 with flange 26.But, cleaning balde 31 is set at the cleaning entire image zone and the outside thereof, thereby toner contacts with flange 26 probably.For fear of this problem occurring, pressing element 50E is arranged on the inboard, end of cleaning balde 31, and has conical in shape.Therefore, the toner that is deposited on the pressing element 50E can accumulate on the medial side of intermediate transfer belt 15, and is collected again by cleaning balde 31.Therefore, can prevent that toner from scattering.In addition, any additional member needn't be set except pressing element 50E scatters to prevent toner.Therefore, can reduce production costs.
And, even at toner during from the end leakage of middle transfer belt cleaning unit 32, because the conical in shape of pressing element 50E flows in the medial side of intermediate transfer belt 15 gradually so surpass a certain amount of toner.Therefore, toner is difficult to be deposited on the pressing element 50E, can prevent that thus toner from scattering.Therefore, can prevent from such a way to be deposited on upward caused energy supply fault of pressing element 50E because toner scatters, promptly prevent inner dispersed toner contamination, and can prevent the dispersed toner contamination of light receiving unit of toner mark sensor in the unit that comprises intermediate transfer belt 15.Therefore, intermediate transfer belt 15 stable motion for a long time.
Figure 28 is the fragmentary, perspective view that comprises as the belting of the pressing element 50F that improves embodiment at second of the pressing element 50D shown in Figure 26.Pressing element 50F comprises toner storage unit (not shown), wherein temporarily stores the toner that is deposited on the pressing element 50F.The toner storage unit is arranged among a part of pressing element 50F, and pressing element 50F contacts with intermediate transfer belt 15 on the upstream side of direction of motion at intermediate transfer belt 15 there.Therefore, can prevent that the toner that is deposited on the pressing element 50F from scattering.In addition, toner can effectively flow in the medial side of intermediate transfer belt 15.
And, between pressing element 50F and intermediate transfer belt 15, be formed with the space, thereby even when toner scatters, toner also can be by this space diffusion.Therefore, can prevent that toner is diffused into the outside, space.
Figure 29 is as the partial elevation view of improving the belting of embodiment at first of the embodiment shown in Figure 26.In Figure 29, pressing element 50G is supported by the support 51 that is installed on the bearing 54.Bearing 54 is positioned at the flange 26A outside.Pressing element 50G is located at intermediate transfer belt 15 respectively on the both sides of Width.Support 51 is located thereby support 51 can be supported on the fixed position with respect to intermediate transfer belt 15 with pressing element 50G along with on flange 26A.Therefore, pressing element 50G can be used for preventing occurring deflection deformation with flange 26A in abutting connection with a part of intermediate transfer belt 15 that contacts.Therefore, the enough this simple structure of energy is improved the permanance of belting with lower cost.
Figure 30 is as the partial elevation view of improving the belting of embodiment at second of the embodiment shown in Figure 26.In Figure 30, pressing element 50H is supported by the support 51 that is installed on the plate 55.Plate 55 is supporting the axle that is positioned at flange 26A outside of draw roll 20.Pressing element 50H can be located at intermediate transfer belt 15 on the both sides or either side of Width.Plate 55 can not constitute and can move along with the rotation of draw roll 20.Pressing element 50H can be used for preventing the deflection deformation in abutting connection with a part of intermediate transfer belt 15 that contacts with flange 26A.
Figure 31 is as the partial elevation view of improving the belting of embodiment at the 3rd of the embodiment shown in Figure 26.In Figure 31, pressing element 50I is supported by the support 51 that is installed on the flange 26B.Flange 26B does not constitute and can move along with the rotation of draw roll 20.Pressing element 50I is located at intermediate transfer belt 15 on the both sides or either side of Width.Support 51 is fixedly mounted on the flange 26B by clasp, screw, bonding agent etc.Pressing element 50I so arranges, thus pressing element 50I can be pressed in flange 26B on a part of intermediate transfer belt 15 that contacts.Therefore, can prevent with flange 26B in abutting connection with that part of intermediate transfer belt 15 deflection deformations that contact.
Like this, by pressing element, can prevent to cause energy supply fault or process control mistake to occur by being deposited on the toner diffusion on the pressing element.In other words, the toner contamination that can be spread apart by the light receiving unit inside that prevents transfer printing unit or toner mark sensor prevents energy supply mistake or process control mistake.Therefore, just, can prevent the deflection deformation of intermediate transfer belt 15, and can realize stable band transmission for a long time by pressing element.
As mentioned above, according to an aspect of the present invention, flange is set therein prevents that pressing element is pressed on a part of edge surface of the band that contacts with flanges abut in the situation with crooked belting, prevent thus with deflection deformation.Therefore, can prevent reliably with the permanance color registration mistake that descends and occur causing by deflection deformation.Especially, pressing element constitutes at a part of edge surface position adjacent place of the band that contacts with flanges abut and is pressed on the belt surface.Therefore, with pressing element press down on tape with prevent with the rising behavior, that is, between band and roller, form this structure difference in gap, pressing element is pressed on tape so that prevent and take up volt, promptly prevents to take out of existing distortion before taking place.Therefore, can prevent to take out of existing deflection deformation reliably.
In addition, by just being set, pressing element prevents this simple structure with deflection deformation, can improve the permanance of band, and can be owing to not considering that permanance uses the high tenacity band to raise the cost, and can avoid forming defective image because color registration mistake etc. cause.
Though the present invention is known complete explanation with reference to these specific embodiments, but therefore claims are not restricted, and fall within all distortion in the scope and the structure of variation in the given basic instruction here but be considered to contain for those of ordinary skills are conspicuous.
The application has required the right of priority of the 2007-265863 that submits in Japan in the Japanese priority document 2007-184988 that submitted in Japan on July 13rd, 2007 and on October 11st, 2007, and its full content is quoted as a reference.
Claims (39)
1. belting, it comprises:
Band, described band are by a plurality of roll support and be driven along predetermined direction and move;
Flange member, this flange member constitute and contact with a part of edge surface along its Width; And
Pressing element, this pressing element pressurizes on belt surface along the thickness direction of being with near the position the contact portion that flange member contacts at band.
2. belting as claimed in claim 1, wherein said pressing element are arranged in the outside of imaging region along Width.
3. belting as claimed in claim 1, wherein said pressing element is arranged on the upstream side of that part of band that band wherein just in time contacts with the external peripheral surface of the roller that is supporting this band along the sense of rotation of roller.
4. belting as claimed in claim 1, press on tape near the position of the wherein said pressing element that part of edge surface of the band that contacts with flange member on the end face that is located at the roller that is supporting described band.
5. belting as claimed in claim 1, wherein said pressing element is member slidably.
6. belting as claimed in claim 1, at least a portion surface in contact of wherein said pressing element and described band is made by felt.
7. belting as claimed in claim 1, wherein said pressing element is for by contact the rolling member along with the motion rolling of band with band.
8. belting as claimed in claim 1, wherein said pressing element is by dividing the fixed component that is arranged to support with roller and band.
9. belting as claimed in claim 1, wherein said pressing element can contact with band or separate with band.
10. belting as claimed in claim 1, wherein said pressing element forms as one with fixed component that can support rollers, thus pressing element can be pressed on the belt surface along thickness direction.
11. belting as claimed in claim 1, wherein said pressing element along the thickness direction bias voltage to belt surface.
12. belting as claimed in claim 1, wherein said pressing element can move along Width.
13. belting as claimed in claim 1, the circular arc portion Elastic Contact of wherein said pressing element and band, at described circular arc portion band by roll support.
14. belting as claimed in claim 1, wherein said pressing element is latchable on the rib in the side on the downstream of the rotation direction that is supporting the roller of being with.
15. being arranged between the edge surface side of the member of flange member outside and band, belting as claimed in claim 1, wherein said pressing element extend, and on flange member.
16. belting as claimed in claim 15, wherein when described flange member moves along with the roller turn that is supporting band, the first end of pressing element by be positioned at flange member outside, in the member supports that strides across on the edge surface opposite side of flange member and band, and the second end of pressing element is pressed on the surface of band.
17. belting as claimed in claim 15, wherein when described flange member did not move along with the rotation of the roller that is supporting band, the first end of pressing element was supported by flange member, and the second end of pressing element is pressed on the belt surface.
18. belting as claimed in claim 1, also comprise and be located near the toner mark detecting sensor installation component of roller that is supporting band, the toner mark detecting sensor that is used to detect formation toner mark on tape is installed in this toner mark detecting sensor installation component, and
Pressing element is supported by described toner mark detecting sensor installation component.
19. belting as claimed in claim 18, wherein said toner mark detecting sensor can move along Width.
20. an imaging device comprises as each described belting in the claim 1 to 19.
21. imaging device as claimed in claim 20, wherein the pressing element that is pressed on the belt edge near surface from the band face side is arranged on the toner mark detecting sensor installation component.
22. a belting, it comprises:
Pressing element, this pressing element be arranged in the endless belt at least one side of its Width and along with the direction of endless belt Surface Vertical under be pressed on the end of endless belt, described endless belt is prevented to depart to the either side along Width by the flange member on each end face that is located at one of them roller that is supporting the endless belt; And
Cleaning unit, this cleaning unit cleaning is attached to the toner on the endless belt, wherein
Described pressing element has conical in shape, thereby pressing element narrows down gradually towards the medial side of endless belt.
23. belting as claimed in claim 22, wherein said cleaning unit is collected the toner that moves to the medial side of band from pressing element.
24. belting as claimed in claim 22, wherein
Described pressing element is arranged in the image-region outside that is used for forming on tape image, and
The end of pressing element on the band medial side is positioned at from the extended straight line in the end of cleaning unit or is positioned at along the inboard of the straight line of the medial side direction of being with.
25. belting as claimed in claim 22 also is included in the toner storage unit of wherein temporarily storing toner, this toner storage unit is arranged on the upstream side of pressing element pressure position on tape along the direction of motion of band.
26. belting as claimed in claim 22, the first end of wherein said pressing element are installed in flange member or are positioned on the fixed component of belting of flange member outside, and the second end of pressing element is pressed on tape.
27. belting as claimed in claim 26, wherein when described flange member moves along with the rotation of the roller that is supporting band, the first end of pressing element is installed on the fixed component, and the second end of pressing element is pressed on tape, on flange member.
28. belting as claimed in claim 26, wherein when described flange member did not move along with the rotation of the roller that is supporting band, the first end of pressing element was installed on the flange member, and the second end of pressing element is pressed on tape.
29. belting as claimed in claim 22, wherein said pressing element is member slidably.
30. belting as claimed in claim 29, wherein said pressing element are the felt member.
31. an imaging device, this imaging device comprises belting, and this belting comprises:
Pressing element, this pressing element be arranged in the endless belt at least one side of its Width and along with the direction of endless belt Surface Vertical under be pressed on the end of endless belt, described endless belt is prevented to depart to the either side along Width by the flange member on each end face that is located at one of them roller that is supporting the endless belt; And
Cleaning unit, this cleaning unit cleaning is attached to the toner on the endless belt, wherein
Described pressing element has conical in shape, thereby pressing element narrows down gradually towards the medial side of endless belt.
32. imaging device as claimed in claim 31, wherein said cleaning unit is collected the toner that moves to the medial side of band from pressing element.
33. imaging device as claimed in claim 32, wherein
Described pressing element is arranged in the image-region outside that is used for forming on tape image, and
The end of pressing element on the band medial side is positioned at from the extended straight line in the end of cleaning unit or is positioned at along the inboard of the straight line of the medial side direction of being with.
34. imaging device as claimed in claim 31 also comprises being used for temporarily storing therein the toner storage unit of toner, this toner storage unit is arranged in pressing element along the direction of motion of band and presses on tape the position upstream side.
35. imaging device as claimed in claim 31, the first end of wherein said pressing element are installed in flange member or are positioned on the fixed component of belting of flange member outside, and the second end of pressing element is pressed on tape.
36. imaging device as claimed in claim 35, wherein when described flange member moves along with the rotation of the roller that is supporting band, the first end of pressing element is installed on the fixed component, and the second end of pressing element is pressed on tape, on flange member.
37. imaging device as claimed in claim 35, wherein when described flange member did not move along with the rotation of the roller that is supporting band, the first end of pressing element was installed on the flange member, and the second end of pressing element is pressed on tape.
38. imaging device as claimed in claim 31, wherein said pressing element is member slidably.
39. imaging device as claimed in claim 31, wherein said pressing element are the felt member.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP184988/07 | 2007-07-13 | ||
| JP2007184988A JP5017684B2 (en) | 2007-07-13 | 2007-07-13 | Belt device and image forming apparatus |
| JP2007265863A JP5113477B2 (en) | 2007-10-11 | 2007-10-11 | Transfer belt device and image forming apparatus |
| JP265863/07 | 2007-10-11 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210165966.1A Division CN102692852B (en) | 2007-07-13 | 2008-07-11 | Belt device and image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101344746A true CN101344746A (en) | 2009-01-14 |
| CN101344746B CN101344746B (en) | 2012-07-18 |
Family
ID=40246765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101360668A Active CN101344746B (en) | 2007-07-13 | 2008-07-11 | Belt device and image forming apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5017684B2 (en) |
| CN (1) | CN101344746B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2009020469A (en) | 2009-01-29 |
| CN101344746B (en) | 2012-07-18 |
| JP5017684B2 (en) | 2012-09-05 |
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