CN100545068C - Imaging device - Google Patents
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- CN100545068C CN100545068C CNB2003801039899A CN200380103989A CN100545068C CN 100545068 C CN100545068 C CN 100545068C CN B2003801039899 A CNB2003801039899 A CN B2003801039899A CN 200380103989 A CN200380103989 A CN 200380103989A CN 100545068 C CN100545068 C CN 100545068C
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- paper
- belt conveyor
- counter roller
- imaging device
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- Ink Jet (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
A kind of imaging device comprises: endless belt conveyer, counter roller and clutch part.This endless belt conveyer is rotatable to transmit paper, and a surface of described belt conveyor is recharged simultaneously.This counter roller is used for keeping paper and transmits paper between described belt conveyor and described counter roller.Cause this clutch part slip by the velocity contrast between described belt conveyor and the described counter roller.Drive described counter roller by described clutch part.
Description
Technical field
The present invention relates generally to a kind of imaging device, relate to a kind of the use more specifically and transmit the imaging device that brings the transmission paper.
Background technology
As everyone knows, ink jet printer is such as a kind of known imaging device in the imaging device (perhaps image recording structure) of chopping machine, facsimile apparatus and duplicator etc.Ink jet printer is by coming from the header record ink-jet at the enterprising line item of recording medium such as paper (log sheet) etc.Described recording medium is not limited to paper.Described recording medium is meant the medium that can form image on it.For example, described recording medium can be OHP (overhead projector) page or leaf.Ink jet printer can at high speed, the noise of low operating cost and reduction writes down high-precision image.And then ink jet printer has and is easy to use multiple color inks to come the advantage of record color image.
Known ink gun comprises piezo-activator (for example piezoelectric element), thermal actuator, shape memory alloy actuator or the electrostatic actuator as the part of the produce power parts that are used for ink-jet.Thermal actuator has utilized the phase transformation of the caused liquid of film boiling that produces by use electric transducer (for example thermal element).Shape memory alloy actuator has utilized the metal phase change that causes owing to temperature change.Electrostatic actuator has adopted electrostatic force.
The imaging device of following a kind of electrofax type.The next toner image that on photosensitive material, forms of developing cell that such imaging device uses charhing unit, exposing unit and centers on the photosensitive drums setting, by transfer printing unit this toner image is transferred on the paper, and by fixation unit with this toner image to paper.
The various paper feed units that are used for such imaging device are provided.Japanese Laid-Open Patent Application No.7-53082 (prior art 1) discloses a kind of paper feed unit, and this paper feed unit just in time transmits the paper of sending into an angle from top in the horizontal direction, and behind record this paper is ejected.In addition, Japanese Laid-Open Patent Application No.8-295438 (prior art 2) discloses a kind of paper feed unit, this paper feed unit uses the direction of transfer of the paper that the guiding piece of the part with circular contour will send into from following approximate vertical to change roughly 90 degree, and behind record this paper is ejected.
Two types forwarder can be used for transmitting paper.First type forwarder adopts delivery roller to transmit paper.In addition, prior art 1 and prior art 2 disclose second type forwarder with endless charged band.Second type forwarder makes paper adhere electrostatically to the powered surfaces of charged band, and rotates the charged band that is attached with paper on it so that transmit paper.Therefore, such forwarder stops paper to separate from charged band, keeps the high planeness (flatness) of paper thus.
The imaging device of prior art 2 contacts by the transmission guiding piece that makes the paper send into and along the surface of belt conveyor the transfer path of circular contour (or have) form and the direction of transfer of paper has been changed roughly 90 spends, and the paper that horizontal transmission is sent into from following approximate vertical.
Under following situation, promptly as in the imaging device of prior art 2, by when guiding paper, the direction of transfer of paper having been changed roughly 90 degree by the transmission guiding piece that in transfer path, has circular contour part, and the paper that horizontal transmission is sent in the approximate vertical that makes progress upward, if paper is common paper, the resistance that produces at this transmission guiding piece place when paper contacts with the transmission guiding piece is low.Therefore, even belt conveyor has low coefficientoffriction, but high precision and transmit paper reliably.
On the other hand, ground paper (for example being used for improving the glazed paper or the card of picture quality) is used in ink-jet recording apparatus especially.If use such ground paper, the resistance that produces when changing the direction of transfer of paper is big, if make employing have the belt conveyor of low coefficientoffriction, then the resistance that is produced surpasses conveying capacity.This causes producing the phenomenon that paper slides on belt conveyor.
Thus, if in the transmission paper process of the big conveying capacity of needs, adopt to have low coefficientoffriction to stop the belt conveyor that produces big conveying capacity, the transmission of paper becomes, and instability is feasible more paper jam may to take place.
According to ink mist recording, ink is attached to paper.Therefore, when forming image on paper, the moisture that is contained in the ink causes that paper stretches.This phenomenon is become wrinkling (cockling).The wrinkling ripple that causes paper makes the nozzle of header record and the distance basis between the paper surface change in the lip-deep position of paper.Wrinkling can be seriously so far, under the worst situation, paper contacts with the nozzle surface of header record.Therefore, not only the nozzle surface of header record but also paper itself is all contaminated, makes to have reduced picture quality.And then, because causing ink droplet, wrinkling drops on wrong direction (misdirection).
According to traditional ink-jet recording apparatus, paper feed is undertaken by roller.On each side in the image print zone on the paper feed direction (zone that header record prints), a pair roller is set.The a pair of of these centerings is the combination of toothed wheel (spur) and roller.Yet,, have only the precision that when paper is sandwiched between every pair roller, just can guarantee paper feed according to this structure.
Owing to require to increase print area in recent years, some inkjet-printing devices come holding paper so that guarantee print area by only a pair of in two pair rollers when printing, and this state can not guarantee the paper feed precision.Yet, when coming holding paper, can't solve the problem that paper is floated, and the precision of paper feed can't guarantee because conveying capacity is not enough also by only a pair of in two pair rollers.This causes image quality decrease.
Therefore, a kind of ink-jet recording apparatus that comprises the endless charged band with the planeness of maintenance paper is proposed.This ink-jet recording apparatus makes paper adhere electrostatically to the powered surfaces of charged band, and rotates the charged band that is attached with paper on it so that transmit paper.Thereby this ink-jet recording apparatus stops paper to separate from charged band, keeps the high Pingdu of paper thus.This ink-jet recording apparatus discloses in Japanese Patent No.2897960 (prior art 3) and Japanese Laid-Open Patent Application No.7-53081 (prior art 4).
When transmitting in aforesaid conventional ink-jet recording apparatus under the situation of the paper that adheres electrostatically to belt conveyor, the Pingdu of paper is directly relevant with the Pingdu of belt conveyor.
In this case, belt conveyor engages with at least two rollers to extend betwixt, makes that the string portion (chord part) of belt conveyor is relative with the image print zone.Yet belt conveyor is easy to have fold in its string portion, and when belt conveyor rotated, belt conveyor can rise and fall in its string portion.Therefore, the planeness of belt conveyor reduces.
Therefore, even under the situation that adopts belt conveyor, the Pingdu of belt conveyor reduces the variable in distance that can cause between header record and the paper, has reduced picture quality thus.
In addition, under the situation that in aforesaid traditional ink-jet recording apparatus, transmits the paper adhere electrostatically to belt conveyor, for paper sheet stacking in row's paper part, paper separates by peeling off certainly with belt conveyor.Yet, be formed with the nonelastic paper of image on it or the paper that follows the string is prevented from separating by peeling off certainly with belt conveyor, and still be attached to belt conveyor.Therefore, paper jam takes place.
And then, when in aforesaid conventional ink-jet recording apparatus, transmitting under the situation of the paper that adheres electrostatically to belt conveyor, must guarantee electrostatic adhesive force so that paper is attached to belt conveyor by belt conveyor.Yet in traditional imaging device, belt conveyor is a single belt, makes that can't obtain enough electrostatic force stably transmits paper.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of imaging device, eliminate above-mentioned shortcoming.
A concrete purpose of the present invention provides a kind of imaging device, can stably transmit the paper that needs big conveying capacity by the direction of transfer that changes paper.
Another specific object of the present invention provides a kind of imaging device, and this imaging device can keep the Pingdu of belt conveyor and carry out the record of high image quality.
A concrete purpose more of the present invention provides a kind of imaging device, and it can guarantee that paper separates from belt conveyor.
Another concrete purpose of the present invention provides a kind of imaging device, and this imaging device can use belt conveyor stably to transmit paper.
Realize one or more above-mentioned purpose of the present invention by a kind of imaging device, this imaging device comprises: an endless belt conveyer, and it is rotatable to transmit paper, and the surface of described belt conveyor is recharged simultaneously; One counter roller, it is used for keeping paper and transmits paper between described belt conveyor and described counter roller; And a clutch part, causing that by the velocity contrast between described belt conveyor and the described counter roller this clutch part slides, wherein said counter roller drives by described clutch part.
Can realize one or more above-mentioned purpose of the present invention by another kind of imaging device, this imaging device comprises: a delivery roller, and it rotatably transmits paper; One counter roller, it is used for keeping paper and transmits paper between described delivery roller and described counter roller; And a clutch part, causing that by the velocity contrast between described delivery roller and the described counter roller this clutch part slides, wherein said counter roller drives by described clutch part.
According to above-mentioned imaging device, be used in the counter roller of the paper that keeps paper between belt conveyor or delivery roller and the counter roller and send into by owing to the velocity contrast between belt conveyor or delivery roller and the counter roller causes that the clutch part of slip drives.Therefore, can stably transmit even need the paper of big conveying capacity, change its direction of transfer simultaneously, and can not cause influencing the triboelectrification and because the load increase that friction causes of transmission property and imaging.
Can realize one or more above-mentioned purpose of the present invention by another kind of imaging device, this imaging device, comprise: an endless belt conveyer, it is rotatable to transmit paper, the surface of described belt conveyor is recharged simultaneously, described belt conveyor is supported by at least two rollers, and engages described two rollers so that extend betwixt; One header record, its liquid droplets with in print area on paper document image; An and guiding piece, it is arranged on the inboard of described belt conveyor, corresponding to the position of print area, one surface of described guiding piece is protruding to described header record and exceed the tangent line of the roller that supports described belt conveyor, and the surface of described guiding piece contacts with described belt conveyor.
According to above-mentioned imaging device, the string portion part of print area (promptly corresponding to) that has prevented belt conveyor produces fold or moves and changes.Therefore, document image in high quality.
Can realize one or more above-mentioned purpose of the present invention by another kind of imaging device, this imaging device, comprise: an endless belt conveyer, it is rotatable to transmit paper, one surface of described belt conveyor of while is recharged and paper is attached to this surface, described belt conveyor is supported by at least two rollers, and engages described two rollers so that extend betwixt; One header record, its liquid droplets is with document image on paper; And a separation device, it separates paper on the side that the paper that records image of described belt conveyor is discharged from imaging device from described belt conveyor.
According to above-mentioned imaging device, row's paper one side of belt conveyor is carried in the separation device setting.Therefore, can guarantee that paper separates and discharge from belt conveyor, stop thus paper jam takes place.
Can realize one or more above-mentioned purpose of the present invention by another kind of imaging device, this imaging device, comprise: an endless belt conveyer, it is rotatable to transmit paper, one surface of described belt conveyor of while is recharged and paper is attached to this surface, described belt conveyor is supported by at least two rollers, and engages described two rollers so that extend betwixt; One header record, its liquid droplets are with document image on paper, and paper is discharged from imaging device after image has recorded on the paper; And wherein said belt conveyor comprises the double-decker that is made of insulating barrier and medium resistance layer (medium resistance layer).
According to above-mentioned imaging device, belt conveyor is made of the double-decker that comprises top (outward) layer (being insulating barrier) and the end (interior) layer (being medium resistance layer).Therefore, can obtain feasible can the stablizing of enough electrostatic adhesive force transmits paper and has improved picture quality thus.
Description of drawings
Other purposes of the present invention, feature and advantage are read in conjunction with the drawings and are described in detail and obvious.
Fig. 1 is the topology view as the ink-jet recording apparatus of imaging device that shows according to the first embodiment of the present invention;
Fig. 2 is the partial plan according to the ink-jet recording apparatus of the first embodiment of the present invention;
Fig. 3 is the partial view of demonstration according to the translator unit of the ink-jet recording apparatus of the first embodiment of the present invention;
Fig. 4 is the view that is used to illustrate according to the structure of the belt conveyor of the ink-jet recording apparatus of first embodiment of the invention;
Fig. 5 is the view that is used to illustrate according to the setting of the guiding piece of the ink-jet recording apparatus of first embodiment of the invention;
Fig. 6 is the transparent view according to the first embodiment of the invention guiding piece;
Fig. 7 is the view that is used to illustrate according to the drive system of the counter roller of the ink-jet recording apparatus of first embodiment of the invention;
Fig. 8 is another view that is used to illustrate according to the drive system of the counter roller of the ink-jet recording apparatus of first embodiment of the invention;
Fig. 9 is the view that is used to illustrate the second embodiment of the present invention.
The specific embodiment
Hereinafter with reference description of drawings embodiments of the invention.
(first embodiment)
The following describes the first embodiment of the present invention.
Fig. 1 is the view as the structure of the ink-jet recording apparatus of imaging device that shows according to first embodiment of the invention.Fig. 2 is the partial plan of ink-jet recording apparatus.Fig. 3 is the partial view that shows the translator unit of ink-jet recording apparatus.
With reference to Fig. 1 and 2, ink-jet recording apparatus of the present invention comprises guide rod 1 and pillar 2, and it is provided as at X
1And X
2The guiding piece that extends between the side epipleural (not shown).Ink-jet recording apparatus keeps carriage 3 by guide rod 1 and pillar 2, makes that carriage 3 can be at main scanning direction or X
1And X
2Slide on the direction.Main scan motor (not shown) driven bracket 3 makes carriage 3 at X
1And X
2Move on the direction and scanning.
Carriage 3 comprises the header record of being made up of yellow (Y), blue or green (C), fuchsin (M) and black (Bk) these four kinds of ink guns 4, to spray versicolor ink droplet.Header record 4 is connected, and makes the ink-jet opening of header record 4 be arranged on the direction across main scanning direction, and at Z
2Spray ink from this ink-jet opening on (downwards) direction.
Each ink gun that constitutes header record 4 can adopt piezo-activator (for example piezoelectric element), thermal actuator, shape memory alloy actuator or electrostatic actuator as being used for the parts of produce power with the ejection ink.
Carriage 3 comprises the auxiliary box body 5 of four kinds of colors, is used for providing versicolor China ink to header record 4.Provide color ink from each main cartridge (print cartridge) to cooresponding auxiliary box body by ink supply pipe (not shown).
In addition, ink-jet recording apparatus comprises the paper feed part that is used to send into the paper 12 on heap paper part (pressure plate) 11 that is stacked on sheet feed cassette 10.Paper feed partly comprises crescent roller (paper pushing roller) 13, and it separates paper 12 page by page and send to from heap paper part 11, and separating pad 14, and it is made and be set to relative with paper pushing roller 13 by the material with great friction coefficient.Separating pad 14 is biased towards paper pushing roller 13.
Ink-jet recording apparatus comprises and being used in header record 4 bottoms (at the Z of header record 4
2On the side) transmit the translator unit of each page paper 12 of partly sending into from paper feed.Translator unit comprises belt conveyor 21, and counter roller (pressure roller) 22 transmits guiding piece 23, edge pressure roller 25 and charging roller 26.Belt conveyor 21 transmits paper 12 by making paper 12 adhere electrostatically to belt conveyor 21.Paper 12 partly transmits from paper feed by guiding piece 15 and enters and be maintained between belt conveyor 21 and the counter roller 22.Transmitting guiding piece 23 will be at (the Z that makes progress
1) direction of transfer of the paper 12 that approximate vertical is sent on the direction changes roughly 90 degree, makes paper 12 transmit on belt conveyor 21 and along belt conveyor 21 transmission.By holding element 24 edge pressure roller 25 is biased towards belt conveyor 21.Charging roller 26 is the charging unit to the surface charge of belt conveyor 21.Can from ink-jet recording apparatus, omit and keep roller 30.
With reference to figure 1 and 3, belt conveyor 21 is endless belt (not having the band of end or the band that two ends are linked together), and tension engagement delivery roller 27 and tension force roller 28 are so that between extends.The rotation of direction shown in the arrow A of belt conveyor 21 in Fig. 3.This direction can be called as the direction of transfer of band or paper.
With reference to figure 4, belt conveyor 21 comprises top (outward) layer 21a and the end (interior) layer 21b.Top layer 21a can adhere to attached paper surface on it as paper 12.Top layer 21a is by the thick pure resin material of about 40 μ m, and for example pure ETFE (tetrafluoroethylene-ethylene copolymer) material is made, non-resistance control (resistancecontrol).Bottom 21b provides resistance control by carbon to it by making with top layer 21a identical materials.Bottom 21b also can be called as medium resistance layer or ground plane (ground layer).
The thickness effect specific inductance capacity of the insulating barrier of belt conveyor 21 (top layer) 21a.If it is big that thickness becomes, the specific inductance capacity step-down makes that the quantity of electric charge on the belt conveyor 21 reduces when belt conveyor 21 chargings.Therefore, even become in the zero scope by making top layer 21a approach as far as possible and being in the thickness that prevents top layer 21a under the situation that belt conveyor 21 damages owing to actual use, electrostatic adhesive force can increase.And then, can be with owing to the variation range of the bed thickness of making former thereby fluctuation is taken into account when making top layer 21a thin as far as possible.According to experiment, be less than or equal at the thickness of top layer 21a under the situation of 60 μ m and obtain desirable electrostatic adhesive force.
The thickness of the bottom 21b of belt conveyor 21 does not directly influence electrostatic interaction.If the integral thickness of belt conveyor 21 increases, yet the increase of its rigidity makes it become and is difficult to guarantee the planeness of the belt conveyor 21 when being mounted (tension) in the device of belt conveyor 21 in reality.On the other hand, the thickness of belt conveyor 21 can not excessively reduce to guarantee required intensity.According to experiment, bottom 21b thickness is preferably about 40 to 200 μ m, and is preferred, about 50 to the 200 μ m of thickness.
Thus, belt conveyor 21 forms double-decker, and the layer 21b with resistance control is formed on the end (interior) layer of belt conveyor 21.This structure makes to be to form electric charge on the insulating barrier at top layer 21a earlier, provides extra electric charge to top layer 21a when after this paper on being attached to belt conveyor 21 12 contacts with belt conveyor, increases the electrostatic adhesive force between paper 12 and the belt conveyor 21 thus.If 21 of belt conveyor are formed by single insulating barrier, compare adhesive ability with above-mentioned double-deck situation and reduce half.And then under the situation of single layer structure, the relative position of ground connection roller that paper 12 Ying Zaiyu are arranged in the belt conveyor 21 begins to contact with belt conveyor 21.There is not this restriction under the double-deck situation.
In this case, use material, and the material with 1E+8 Ω/sq. or littler surface resistivity obtain required electrostatic adhesive force as bottom 21b as top layer 21a with 1E+10 Ω/sq. or bigger surface resistivity.
Charging roller 26 is set so that the top layer 21a of charging roller 26 and belt conveyor 21 and drive 26 rotations of charging roller by the rotation of belt conveyor 21.2.5N masterpiece be pressure be applied to the charging roller 26 the axle each end.Also be arranged to contact and ground connection with medium resistance layer (bottom) 21b of belt conveyor 21 as the delivery roller 27 of above-mentioned ground connection roller.Delivery roller 27 also has 1E+10 Ω cm or littler body resistivity, so that also as the ground connection roller.
With reference to figure 3 and 5, on bottom (interior) side of belt conveyor 21, guiding piece 31 is arranged on the position of the print area that prints corresponding to header record 4.With reference to figure 3 and 6, the X of guiding piece 31
1And X
2End is supported by the frame unit 35 that keeps delivery roller 27 and tension force roller 28, makes guiding piece 31 remain between the frame unit 35.
With reference to figure 5, the upward (Z of guiding piece 31
1Side) surperficial 31a is towards the outstanding delivery roller 27 that supports belt conveyor 21 and the tangent line 32 of tension force roller 28 of exceeding of header record 4.According to this structure, in print area, belt conveyor 21 is directed and is upwards pushed away by the upper surface of guiding piece 31, so that keep high planeness.
Thus, be arranged on guiding piece 31 on the bottom side of belt conveyor 21,, make belt conveyor 21 move along guiding piece 31 promptly corresponding to the part of print area upwards towards the string portion of header record 4 thruster belt conveyor 21.This has stoped the string portion at belt conveyor 21 to produce fold or ripple.Therefore, keep the high planeness of belt conveyor 21, make and carry out record with high picture quality.
And then, with reference to figure 6, on the surperficial 31a of guiding piece 31, wherein should contact with the end (interior) face of belt conveyor 21 by surface 31a, on direction, form a plurality of groove 31b perpendicular to the band direction of transfer so that reduce with 21 areas that contact.Therefore, belt conveyor 21 can move on the surface of guiding piece 31 and along this surface smoothly.
In addition, with reference to figure 3, contact with the bottom surface of belt conveyor 21 on the upstream side that guide roller 33 and guide roller 34 rotatably are arranged in band direction of transfer upward guide piece 31 respectively and the downstream. Preferred guide roller 33 and 34 is separately positioned on the Y of close guiding piece 31 on the band direction of transfer
1And Y
2End.
Thus, contact with the bottom surface of belt conveyor 21 on guide roller 33 and 34 upstream side that rotatably is arranged in band direction of transfer upward guide piece 31 respectively and the downstream.Therefore, can reduce Y at belt conveyor 21 and guiding piece 31
1And Y
2The friction force that produces between the end.Therefore, can reduce the driving load of belt conveyor 21, and also can avoid the variation of moving of the belt conveyor 21 that causes facing to the friction of the end of guiding piece 31 owing to belt conveyor 21.Therefore, can guarantee to stop string portion to produce fold or ripple at belt conveyor 21.Therefore, keep the high-flatness of belt conveyor 21, make and to carry out record by high image quality.
Ink-jet recording apparatus comprises the paper discharge section that is used to discharge every the paper 12 that is write down by header record 4 on it.With reference to figure 1 and 3, the paper discharge section comprise as the disengaging pawl 41 of the separation device that paper 12 is separated from belt conveyor 21, paper trip roller 42 and 43 and the paper that is used to store the paper 12 that withdraws from discharge pallet 44.Disengaging pawl 41 is arranged to contact with belt conveyor 21. Paper trip roller 42 and 43 is arranged on the downstream of the disengaging pawl 41 on band or the paper conveyance direction.Paper is discharged pallet 44 and is arranged on the downstream of paper trip roller 42 and 43.Disengaging pawl 41 is supported so that can pivot by pivot shaft 41a.Elastic body 45 for example spring applies tension force towards belt conveyor 21 to disengaging pawl 41, makes disengaging pawl 41 keep contacting with the surface of belt conveyor 21.
The two-sided paper feed unit (duplex printing mechanism) 51 that is used for duplex printing (printing) on the two sides of paper 12 is connected to the main body of ink-jet recording apparatus (at rear side or Y
1On the side) so that can separate from it and can connect thereon.Two-sided paper feed unit 51 receive (obtaining) by the contrarotation of belt conveyor 21 with the band direction of transfer (Y in Fig. 1
1On the direction) paper 12 that transmits on the opposite direction.Then, two-sided paper feed unit 51 is 12 upsets of the paper that received, and once more the paper 12 of upset is sent in the space between counter roller 22 and the belt conveyor 21.
Drive system with reference to figure 7 and 8 explanation counter roller 22.
According to the drive system of counter roller 22, belt conveyor 21 is by sub-scanning motor 61 rotations, and the axle 27a of this sub-scanning motor 61 by being connected to delivery roller 27 is with 62 and timing gear 63 rotation delivery rollers 27 synchronously.
With reference to figure 8, comprise that the intermediate gear 66 of free-wheel clutch 65 is connected to the axle 27a of delivery roller 27.
Free-wheel clutch 65 is because the velocity contrast between delivery roller 27 and the counter roller 22 causes the clutch part of slip.Intermediate gear 66 is meshed with the driven wheel 67 of axle on the 22a that is connected to counter roller 22.Therefore, be sent to counter roller 22 from the rotary driving force of sub-scanning motor 61 axle 27a, free-wheel clutch 65, intermediate gear 66 and the driven wheel 67 by delivery roller 27.
In this case, when direction shown in the arrow A of delivery roller 27 in Fig. 7 and 8 (being also referred to as the forward direction direction of transfer) went up rotation, free-wheel clutch 65 was delivered to intermediate gear 66 with the rotation of axle 27a.When delivery roller 27 with the forward direction sender in the opposite direction (perhaps paper 12 be sent to two-sided paper feed unit 51 with the direction of carrying out duplex printing on) when going up rotation, free-wheel clutch 65 can not be delivered to the rotation of axle 27a intermediate gear 66.
According to the drive system of counter roller 22, the linear velocity of counter roller 22 is set to the linear velocity that is lower than belt conveyor 21.Speed is set and makes the linear velocity of counter roller 22 hang down about 2% than the linear velocity of belt conveyor 21.Test results shows that this speed is actv. in this ink-jet recording apparatus.
According to ink-jet recording apparatus with said structure, separate paper 12 page by page and it is sent into from paper feed part, and every paper 12 is sent in the approximate vertical that makes progress upward, and by guiding piece 15 guiding with between the belt conveyor 21 and counter roller 22 that are transmitted and are maintained at rotation, as shown in Figure 7.Yet the paper of sending into 12 has by transmitting the front edge that guiding piece 23 guided and be pressed against by edge pressure roller 25 belt conveyor 21.Thus, the direction of transfer of paper 12 has been changed about 90 degree.
At this moment, belt conveyor 21 and counter roller 22 are rotated by the rotary driving force that receives sub-scanning motor 61.Therefore, even when paper 12 is extensible papers, for example glazed paper or ground paper, so that when transmitting that guiding piece 23 has high friction coefficient and belt conveyor 21 had low coefficientoffriction, paper 12 can not send into slidably and its direction of transfer can change, and makes that can upload paper feeding at belt conveyor 21 opens 12.
In this case, if having only counter roller 22 to be driven,, for example factors such as wearing and tearing of vary in diameter, temperature expansion and counter roller 22 produce velocity contrast owing to causing between counter roller 22 and belt conveyor 21.Such velocity contrast makes paper 12 triboelectrifications, load increase and device between load torque produce difference.
Ink-jet recording apparatus according to first embodiment of the invention drives counter roller 22 by free-wheel clutch 65.Therefore, when the linear velocity of belt conveyor 21 during, can cause counter roller 22 slide (perhaps follow the rotation of belt conveyor 21 and rotate) greater than the linear velocity of counter roller 22.
According to the first embodiment of the present invention, because the linear velocity of counter roller 22 is set to the linear velocity (as previously mentioned, difference about 2%) less than belt conveyor 21, the free-wheel clutch 65 of the drive system of counter roller 22 is owing to this velocity contrast is caused slip.Therefore, the subtle change of linear velocity is cancelled so that belt conveyor 21 and counter roller 22 approximate velocity equate.This makes and reduces the triboelectrification that can reduce paper 12 load, and reduce the load-torque difference between the device.
On the other hand, if the linear velocity of belt conveyor 21 is set to the linear velocity that is lower than counter roller 22, the load of the drive system of belt conveyor 21 increases and causes the difference of the load-torque between the device.
Under the situation of duplex printing, belt conveyor 21 with Fig. 8 in the rotation in the opposite direction of side shown in the arrow A.At this moment, free-wheel clutch 65 stops propulsive efforts to be passed to counter roller 22 to make counter roller 22 follow the rotation of belt conveyor 21 and rotate.Finish paper 12 is sent to two-sided paper feed unit 51 after, belt conveyor 21 rotation of direction shown in the arrow A in Fig. 8 once more, and move in the same manner as described above with respect to the paper of sending into from two-sided paper feed unit 51 12.
Thus, on belt conveyor 21, send into paper 12 as mentioned above.At this moment, the control circuit (not shown) makes high tension supply alternately apply positive output and negative output, perhaps repeats to apply alternate voltages to charging roller 26.Therefore, on belt conveyor 21, form the alternately pattern of charging valtage.That is, (being on the hand of rotation of belt conveyor 21) on the sub-direction of scanning with predetermined space to the belt conveyor 21 positive and negative charging that hockets, make to form positive and negative electrically-charged bar-shaped zone continuously.When on replacing positive and negative electrically-charged belt conveyor, sending into paper 12, on paper 12, produce the charge polarization opposite with the charging pattern of belt conveyor 21.This is equivalent to and forms parallel connected electric capacity.Therefore, paper 12 is attached to belt conveyor 21 and makes belt conveyor 21 rotate on sub-direction of scanning to transmit paper 12.
Yet by according to picture signal activation record head 4 and movable support bracket 3, ink droplet is ejected on the paper 12 that is in stationary state so that carry out line item.After paper 12 is transmitted preset distance, carry out the record of next line.When the signal of the trailing edge arrival posting field that receives end of record signal or indication paper 12, recording operation finishes and paper 12 is ejected onto on the paper discharge pallet 44.
At this moment, the paper delivery side (Y of belt conveyor 21
2Side), separates and withdraw from from belt conveyor 21 so that guarantee paper 12, and increased electrostatic adhesive force by the double-decker of above-mentioned belt conveyor 21 in the face of disengaging pawl 41.Therefore, stop paper to be attached to belt conveyor 21 and further be transmitted thus and be with 21 to transmit, therefore avoid paper jam.
Also be applicable to the ink-jet recording apparatus that only has delivery roller and do not use belt conveyor transmission paper according to counter roller 22 of the present invention and its drive system.
(second embodiment)
Below, provide explanation to the second embodiment of the present invention.Indicate by identical Reference numeral with the first embodiment components identical.
With reference to figure 9,41 supported 41a of disengaging pawl support pivotly, so that can contact and separate with the surface of belt conveyor 21.In a second embodiment, be provided for making the surface contact of disengaging pawl 41 and belt conveyor 21 and the plunger 61 that separates, to replace elastic body 45.According to the detectable signal that the edge detecting sensor 62 at the edge (leading edge) of surveying paper 12 is provided, master control part 63 drives and control plunger 61 by actuator 64.Edge detecting sensor 62 is set on the carriage 3.
According to this structure, but actuation plunger 61, so that when writing down and discharge paper 12 (, the leading edge of surveying back paper 12 at edge detecting sensor 62 arrives the paper discharge section in the required time period), disengaging pawl 41 contacts so that separate paper 12 from belt conveyor 21 with the surface of belt conveyor 21.When paper 12 when belt conveyor 21 separates, can finish actuation plunger 61 with the surface isolation of disengaging pawl 41 from belt conveyor 21.
According to this structure, can make 41 of disengaging pawls in needs, just contact with the surface of belt conveyor 21.Therefore, improved the durability of belt conveyor 21.
According to the present invention, ink-jet recording apparatus (imaging device) comprises the counter roller 22 that is used for keeping paper 12 between belt conveyor 21 or delivery roller 27 and counter roller 22 and transmits paper 12.By because the velocity contrast between counter roller 22 and belt conveyor 21 or the delivery roller 27 causes that the free-wheel clutch (clutch part) 65 of slip drives counter roller 22.Therefore, even need big conveying capacity paper also to be stabilized transmission, direction of transfer changes, and can not cause influencing the frictional electrification and because the load increase that friction causes of transmission property and image.
In addition, the belt conveyor 21 that is used to transmit paper 12 supports and engages with two rollers by at least two rollers 27 and 28, and extends between two rollers.The position of the print area that guiding piece 31 is arranged on the bottom side of belt conveyor 21, write down corresponding to header record 4.The upper surface 31a of guiding piece 31 is prominent to exceed two rollers 27 supporting belt conveyor 21 and 28 tangent line 32 to header record 4 sides.This has stoped the string portion corresponding to the belt conveyor 21 of print area to comprise ripple or move variation.Therefore, document image in high quality.
In addition, paper 12 is arranged on moving back on the paper side of belt conveyor 21 from the separation device (disengaging pawl 41) that belt conveyor 21 separates.Therefore, can guarantee that paper 12 separates and withdraws from from belt conveyor 21, stops thus paper jam takes place.
In addition, belt conveyor 21 is formed by the double-decker that comprises top layer 21a (insulating barrier) and bottom 21b (medium resistance layer).Therefore, can obtain enough electrostatic adhesive force, make to stablize and transmit paper 12 and improved picture quality thus.
In the above-described embodiments, disengaging pawl 41 is as separation device.In addition, also can adopt by air blast the air separation mechanism of paper from belt conveyor 21 separation.In addition, in the above-described embodiments, ink-jet recording apparatus is reciprocating type (shuttle) ink-jet recording apparatus, is wherein scanned by carriage.Yet the present invention also can be applicable to have the line ink-jet recording apparatus of line ink gun.
Except ink jet printer, the Multi Role Aircraft that image-forming apparatus according to the present invention also can be applicable to facsimile apparatus, duplicator and comprises chopping machine, facsimile apparatus and duplicator function.And then image-forming apparatus according to the present invention also can be applicable to atomizing of liquids rather than ink droplet, for example the imaging device of the resist of medical domain or DNA sampling.And then with regard to recording method, image-forming apparatus according to the present invention not only can be applicable to ink-jet recording apparatus, also can be applicable to the electrophotographic recording device.
The invention is not restricted to above-mentioned specific embodiment, can under the situation that does not deviate from scope of the present invention, make amendment or modification.
The application requires the preceence of following Japanese publication, the No.2002-341834 that on November 26th, 2002 submitted to, the No.2002-341944 that on November 26th, 2002 submitted to, the No.2002-342036 that on November 26th, 2002 submitted to, and the No.2003-023221 of submission on January 31st, 2003, its full content is incorporated herein by reference.
Claims (16)
1. imaging device comprises:
Endless belt conveyer, it is rotatable to transmit paper, and a surface of described belt conveyor is recharged simultaneously;
Counter roller, it is used for keeping paper and transmits paper between described belt conveyor and described counter roller; And
Clutch part causes this clutch part slip by the velocity contrast between described belt conveyor and the described counter roller,
The linear velocity of wherein said counter roller is set at the linear velocity less than described belt conveyor;
Wherein, when paper does not slide with respect to described belt conveyor, paper is transmitted by the speed with described belt conveyor, described counter roller is driven by described clutch part and works, make when described paper slides with respect to described belt conveyor, described paper is transmitted by the speed with described counter roller, thereby speed reduces.
2. imaging device comprises:
Endless belt conveyer, it is rotatable to transmit paper, and a surface of described belt conveyor is recharged simultaneously;
Delivery roller, it is rotatable to drive described endless belt conveyer;
Counter roller, it is used for keeping paper and transmits paper between described delivery roller and described counter roller; And
Clutch part causes this clutch part slip by the velocity contrast between described delivery roller and the described counter roller,
The linear velocity of wherein said counter roller is set at the linear velocity less than described delivery roller,
Wherein, when paper does not slide with respect to described belt conveyor, paper is transmitted by the speed with described belt conveyor, described counter roller is driven by described clutch part and works, make when described paper slides with respect to described belt conveyor, described paper is transmitted by the speed with described counter roller, thereby speed reduces.
3. imaging device comprises:
Endless belt conveyer, it is rotatable, and a surface of described belt conveyor is recharged simultaneously to transmit paper, and described belt conveyor is supported by at least two rollers, and engages described two rollers so that extend betwixt;
Counter roller, this counter roller are used for keeping paper and transmit this paper between described belt conveyor and described counter roller;
Clutch part causes this clutch part slip by the velocity contrast between described endless belt conveyer and the described counter roller,
Header record, its liquid droplets with in print area on paper document image; And
Guiding piece, it is arranged on the inboard of described belt conveyor, with respect to the position of print area, the tangent line that surpasses the roller that supports described belt conveyor is protruded to described header record in a surface of described guiding piece simultaneously, and the surface of described guiding piece contacts with described belt conveyor
Wherein, the linear velocity of described counter roller is less than the linear velocity of described belt conveyor,
Wherein, when paper does not slide with respect to described belt conveyor, paper is transmitted by the speed with described belt conveyor, described counter roller is driven by described clutch part and works, make when described paper slides with respect to described belt conveyor, described paper is transmitted by the speed with described counter roller, thereby speed reduces.
4. imaging device as claimed in claim 3 also comprises rotatable guide roller, and it is set to contact with described belt conveyor at least one side on the paper conveyance direction, in first and second sides of described guiding piece.
5. imaging device as claimed in claim 3 wherein forms a plurality of grooves in the described surperficial upper edge of the described guiding piece direction vertical with paper conveyance direction.
6. imaging device comprises:
Endless belt conveyer, it is rotatable, and a surface of described belt conveyor of while is recharged and paper is attached to this surface to transmit paper, and described belt conveyor is supported by at least two rollers, and engages so that extend betwixt with described two rollers;
Counter roller, this counter roller are used for keeping paper and transmit this paper between described belt conveyor and described counter roller;
Clutch part causes this clutch part slip by the velocity contrast between described endless belt conveyer and the described counter roller,
Header record, its liquid droplets is with document image on paper; And
Separation device, it separates paper on the side that the paper that records image of described belt conveyor is discharged from imaging device from described belt conveyor,
Wherein, the linear velocity of described counter roller is less than the linear velocity of described belt conveyor,
Wherein, when paper does not slide with respect to described belt conveyor, paper is transmitted by the speed with described belt conveyor, described counter roller is driven by described clutch part and works, make when described paper slides with respect to described belt conveyor, described paper is transmitted by the speed with described counter roller, thereby speed reduces.
7. imaging device as claimed in claim 6, wherein said separation device comprises disengaging pawl.
8. imaging device as claimed in claim 7, wherein said disengaging pawl be arranged to contact with the described surface of described belt conveyor and can with this surface isolation.
9. imaging device comprises:
Endless belt conveyer, it is rotatable, and a surface of described belt conveyor of while is recharged and paper is attached to this surface to transmit paper, and described belt conveyor is supported by at least two rollers, and engages so that extend betwixt with described two rollers;
Counter roller, this counter roller are used for keeping paper and transmit this paper between described belt conveyor and described counter roller;
Clutch part causes this clutch part slip by the velocity contrast between described belt conveyor and the described counter roller,
Header record, its liquid droplets are with document image on paper, and paper is discharged from imaging device after image has recorded on the paper;
The linear velocity of wherein said counter roller is less than the linear velocity of described belt conveyor, and described belt conveyor comprises the double-decker that is made of insulating barrier and medium resistance layer,
Wherein, when paper does not slide with respect to described belt conveyor, paper is transmitted by the speed with described belt conveyor, described counter roller is driven by described clutch part and works, make when described paper slides with respect to described belt conveyor, described paper is transmitted by the speed with described counter roller, thereby speed reduces.
10. imaging device as claimed in claim 9, wherein said insulating barrier and medium resistance layer are respectively the skin and the internal layer of described belt conveyor.
11. imaging device as claimed in claim 9, the insulating barrier of wherein said belt conveyor have 1E+10 Ω/sq. or bigger surface resistivity, the medium resistance layer of described belt conveyor has 1E+8 Ω/sq. or littler surface resistivity.
12. imaging device as claimed in claim 9, the thickness of the insulating barrier of wherein said belt conveyor are less than or equal to 60 μ m, the thickness of the medium resistance layer of described belt conveyor is greater than or equal to 40 μ m.
13. imaging device as claimed in claim 9, wherein one of roller that engages with described belt conveyor has 1E+10 Ω cm or littler body resistivity.
14. imaging device as claimed in claim 9 also comprises separation device, this separation device separates paper on the side that the paper of described belt conveyor is discharged from imaging device with described belt conveyor.
15. imaging device as claimed in claim 14, wherein said separation device comprises disengaging pawl.
16. imaging device as claimed in claim 15, wherein said disengaging pawl are arranged to can contact with the described surface of described belt conveyor and can separate from this surface.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002341834A JP2004175490A (en) | 2002-11-26 | 2002-11-26 | Image recording device |
| JP341834/2002 | 2002-11-26 | ||
| JP341944/2002 | 2002-11-26 | ||
| JP342036/2002 | 2002-11-26 | ||
| JP023221/2003 | 2003-01-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1714033A CN1714033A (en) | 2005-12-28 |
| CN100545068C true CN100545068C (en) | 2009-09-30 |
Family
ID=32704048
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801039899A Expired - Fee Related CN100545068C (en) | 2002-11-26 | 2003-11-14 | Imaging device |
| CN 200380104018 Pending CN1714034A (en) | 2002-11-26 | 2003-11-25 | Inkjet recording device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200380104018 Pending CN1714034A (en) | 2002-11-26 | 2003-11-25 | Inkjet recording device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004175490A (en) |
| CN (2) | CN100545068C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070790A (en) * | 2013-03-27 | 2014-10-01 | 精工爱普生株式会社 | Recording apparatus and recording method |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4492366B2 (en) * | 2004-09-07 | 2010-06-30 | 富士ゼロックス株式会社 | Inkjet recording device |
| US7496326B2 (en) | 2004-12-22 | 2009-02-24 | Ricoh Company, Ltd | Electrostatic attraction device and image forming apparatus using the same |
| JP4717571B2 (en) | 2005-09-16 | 2011-07-06 | 株式会社リコー | Image forming apparatus |
| JP5936115B2 (en) * | 2012-03-27 | 2016-06-15 | ブラザー工業株式会社 | Printing device |
| CN104812688B (en) | 2012-12-27 | 2016-08-31 | 株式会社Ace电研 | Paper feeding device and separating and reclaiming device |
| JP6111758B2 (en) * | 2013-03-15 | 2017-04-12 | セイコーエプソン株式会社 | Medium processing apparatus and paper reversing conveyance unit |
| JP6347129B2 (en) * | 2014-03-26 | 2018-06-27 | セイコーエプソン株式会社 | Recording apparatus and recording method |
| JP6265065B2 (en) * | 2014-06-27 | 2018-01-24 | 京セラドキュメントソリューションズ株式会社 | Paper transport apparatus and ink jet recording apparatus |
| JP6705203B2 (en) * | 2016-02-19 | 2020-06-03 | セイコーエプソン株式会社 | Recording device |
| JP6686669B2 (en) * | 2016-04-26 | 2020-04-22 | セイコーエプソン株式会社 | Printer |
| JP6801319B2 (en) * | 2016-09-14 | 2020-12-16 | コニカミノルタ株式会社 | Paper processing equipment and image forming system |
| CN108551536B (en) * | 2018-06-11 | 2023-08-08 | 重庆光大网络技术有限公司 | Recording device for real estate registration |
-
2002
- 2002-11-26 JP JP2002341834A patent/JP2004175490A/en active Pending
-
2003
- 2003-11-14 CN CNB2003801039899A patent/CN100545068C/en not_active Expired - Fee Related
- 2003-11-25 CN CN 200380104018 patent/CN1714034A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070790A (en) * | 2013-03-27 | 2014-10-01 | 精工爱普生株式会社 | Recording apparatus and recording method |
| CN104070790B (en) * | 2013-03-27 | 2016-10-05 | 精工爱普生株式会社 | Recording equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1714033A (en) | 2005-12-28 |
| JP2004175490A (en) | 2004-06-24 |
| CN1714034A (en) | 2005-12-28 |
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