CN101539733B - Sheet feed device and image forming apparatus - Google Patents

Sheet feed device and image forming apparatus Download PDF

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Publication number
CN101539733B
CN101539733B CN200810176422.9A CN200810176422A CN101539733B CN 101539733 B CN101539733 B CN 101539733B CN 200810176422 A CN200810176422 A CN 200810176422A CN 101539733 B CN101539733 B CN 101539733B
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China
Prior art keywords
sheet material
parts
sheet
load
delivery status
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CN200810176422.9A
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Chinese (zh)
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CN101539733A (en
Inventor
塚本一之
竹内伸
大岛穰
岩城能成
古谷孝男
吉田薰
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Fujifilm Business Innovation Corp
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Fuji Xerox Co Ltd
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Priority claimed from JP2008073394A external-priority patent/JP4507017B2/en
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  • Paper Feeding For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

The invention discloses a sheet feed device and an image forming apparatus. The sheet feed device includes an air flow generating part that generates an air flow for floating a sheet; a feed member that feeds a sheet by rotating, while applying a load to the top one of sheets stacked; and a transport condition sensing unit that is positioned not to obstruct an air flow generated by the air flow generating part and senses a transport condition of a sheet fed by the feed member.

Description

Sheet feeding device and image processing system
Technical field
The present invention relates to a kind of sheet feeding device and image processing system.
Background technology
The uncensored published patented claim No.2006-256820 of Japan has disclosed a kind of sheet feeding device, its subtend is housed in sheet material and accommodates the state that sheet material in part blows and carry out variable control, and realizes the variable control to feeding sheet materials condition according to air blowing state.The uncensored published patented claim No.2006-027843 of Japan has disclosed a kind of paper feeder, and the air that the velocity contrast between its surface of contact translational speed of measuring according to the sheet material translational speed of being measured by web speed measuring unit and by surface of contact velocity survey unit is controlled blower unit blows.The flat 7-315595 of the uncensored published patented claim No. of Japan has disclosed a kind of paper feeder for printer, wherein, identifying unit judges the slip between paper-feed roll and cut paper based on cut paper mobile message, and response changes the contact condition between paper-feed roll and cut paper from the slip information of identifying unit.The uncensored published patented claim No.2006-027842 of Japan has disclosed a kind of paper feeder, wherein, if the velocity contrast between the sheet material translational speed of being measured by web speed measuring roller and the translational speed of pick-up roller surface in contact reaches predetermined value, increase so the load that pick-up roller applies sheet material.The uncensored published patented claim No.2006-213502 of Japan has disclosed a kind of sheet feeding device, wherein, being provided with in the separating part of separate roller and brake roller, whether exist sheet material and brake roller whether rotating to determine that sheet material enters the state of separate roller based on what judge from web speed, and then control for sheet separation applied force.
Summary of the invention
The object of this invention is to provide a kind of sheet feeding device and image processing system, wherein can be in the case of not hindering the delivery status of sensing (detection) sheet material the air-flow for floating sheet material.
To achieve these goals, a first aspect of the present invention is a kind of sheet feeding device, comprising: air-flow generating portion, and it produces the air-flow for floating sheet material; Send parts, it sends sheet material by rotating be positioned at uppermost sheet material imposed load in the sheet material to stacking in; And delivery status sensing cell, it is positioned on the position that does not hinder the air-flow being produced by described air-flow generating portion, for sensing by the described delivery status of sending the sheet material that parts send.
A second aspect of the present invention is according to the sheet feeding device described in first aspect, and wherein, described air-flow generating portion can at least produce along the air-flow of the direction of intersecting with sheet material transport direction.
A third aspect of the present invention is according to the sheet feeding device described in first aspect, and wherein, described air-flow generating portion can at least produce along the air-flow of the direction contrary with sheet material transport direction.
A fourth aspect of the present invention is according to the sheet feeding device described in first aspect, wherein, described delivery status sensing cell can comprise rotatable parts and sheet material traverse measurement part, described rotatable parts contact with the sheet material being just transmitted and rotate the movement that the rotation amount of described sheet material traverse measurement part based on described rotatable parts measured sheet material with described sheet material.
A fifth aspect of the present invention is according to the sheet feeding device described in either side in first to fourth aspect, wherein, described delivery status sensing cell can be positioned at the air-flow that produced by described air-flow generating portion by described in sends the region that parts stop.
A sixth aspect of the present invention is according to the sheet feeding device described in either side in the first to the 5th aspect, also can comprise: load applying part, it is positioned at uppermost sheet material imposed load at the upstream position along sheet material transport direction in to stacking sheet material, wherein, described delivery status sensing cell can be connected with described load applying part.
A seventh aspect of the present invention is according to the sheet feeding device described in either side in the first to the 6th aspect, also can comprise: gas flow-regulating unit, its sensing result based on described delivery status sensing cell regulates the air-flow being produced by described air-flow generating portion.
A eighth aspect of the present invention is according to the sheet feeding device described in either side in the first to the 7th aspect, also can comprise: load control unit, its sensing result based on described delivery status sensing cell regulates by the described parts of sending and is applied to the load on sheet material.
A ninth aspect of the present invention is, according to the sheet feeding device described in eight aspect, also can comprise: rotation amount sensing part, send the rotation amount of parts described in its sensing; And calculating section, the slip that the sensing result of its sensing result based on described rotation amount sensing part and described delivery status sensing cell is calculated sheet material, wherein, described load control unit can the result of calculation based on described calculating section regulates by the described parts of sending and is applied to the load on sheet material.
A tenth aspect of the present invention is according to the sheet feeding device described in the 9th aspect, wherein, described delivery status sensing cell can be shifted (movement) in linkage with the described movement of sending parts, when described load control unit regulates the movement of sending parts described in occurring when sending parts and being applied to the load on sheet material by described.
A eleventh aspect of the present invention is according to the sheet feeding device described in the 7th aspect, wherein, described delivery status sensing cell can by with contact and be shifted for the support component of sending parts described in supporting.
A twelveth aspect of the present invention be according to first to the tenth on the one hand in sheet feeding device described in either side, wherein, described delivery status sensing cell can be the in the situation that of contact sheet not the sensing information relevant with the movement of sheet material.
A thirteenth aspect of the present invention is a kind of image processing system, comprising: image forming portion, and it forms image on sheet material; Sheet feeding device, feeding sheet materials is arrived described image forming portion by it; And air-flow generating portion, it produces for floating the air-flow for the treatment of the sheet material of being supplied with by described sheet feeding device, described sheet feeding device comprises sends parts and delivery status sensing cell, described sending in parts are positioned at uppermost sheet material imposed load in the sheet material to stacking sent sheet material by rotating, described delivery status sensing cell is positioned on the position that does not hinder the air-flow being produced by described air-flow generating portion, for sensing by the described delivery status of sending the sheet material that parts send.
A fourteenth aspect of the present invention is, according to the image processing system described in the tenth three aspects:, also can comprise: apparatus main body, and it holds described image forming portion, and wherein said air-flow generating portion can be removably mounted in described apparatus main body.
A fifteenth aspect of the present invention is a kind of image processing system, comprising: image forming portion, and it forms image on sheet material; And sheet feeding device, feeding sheet materials is arrived described image forming portion by it, described sheet feeding device comprises sends parts and delivery status sensing cell, described sending in parts are positioned at uppermost sheet material imposed load in the sheet material to stacking sent sheet material by rotating, described delivery status sensing cell is positioned on the position that does not hinder the air-flow that floats sheet material, for sensing by the described delivery status of sending the sheet material that parts send.
A sixteenth aspect of the present invention is according to the sheet feeding device described in first aspect, and wherein, described delivery status sensing cell can comprise: rotatable parts, and it contacts with the sheet material being just transmitted and rotates with described sheet material; Sheet material traverse measurement part, its rotation amount based on described rotatable parts is measured the movement of sheet material; And surface of contact traverse measurement part, it sends the movement of surface of contact contact with sheet material in parts described in measuring, and the movement of the surface of contact that control module can be based on being measured by described surface of contact traverse measurement part and controlled by pressing unit and sent the pressing force on parts described in being applied to by the difference between the movement of the sheet material of described sheet material traverse measurement part measurement.
A seventeenth aspect of the present invention is according to the sheet feeding device described in the 16 aspect, and wherein, described rotatable parts can be followed sheet material that the air-flow supplied with from tripping device floats and vertically displacement.
A eighteenth aspect of the present invention is according to the sheet feeding device described in the 17 aspect, also can comprise: tilting member, it rotatably supports described rotatable parts and is supported on swingably on back shaft, and the turning axle of wherein said rotatable parts can be positioned at along sheet material direction of transfer the upstream of described back shaft.
According to a first aspect of the invention, can be in the case of not hindering the delivery status of sensing sheet material the air-flow for floating sheet material.
According to a second aspect of the invention, except the effect being reached by first aspect present invention, compared with the situation that does not have air-flow to produce, can guarantee better that the air-flow for floating sheet material is not hindered on sheet material transport direction crisscross.
According to a third aspect of the invention we, except the effect being reached by first aspect present invention, compared with the situation that does not have air-flow to produce on reverse direction at sheet material transport direction, can guarantee better that the air-flow for floating sheet material is not hindered.
According to a forth aspect of the invention, except the effect being reached by first aspect present invention, can easily detect the delivery status of sheet material.
According to a fifth aspect of the invention, except the effect by either side reaches in the present invention first to fourth aspect, can detect reliably the delivery status of sheet material.
According to a sixth aspect of the invention, except the effect being reached to either side in the 5th aspect by the present invention first, compared with the situation that does not there is load applying part with sheet feeding device, can easily detect the delivery status of sheet material.
According to a seventh aspect of the invention, except the effect being reached to either side in the 6th aspect by the present invention first, compared with the situation that does not there is gas flow-regulating unit with sheet feeding device, can optimize the separation of sheet material.
According to an eighth aspect of the invention, except the effect being reached to either side in the 7th aspect by the present invention first, compared with the situation that does not there is load control unit with sheet feeding device, can optimize the separation of sheet material.
According to a ninth aspect of the invention, except the effect being reached by eighth aspect present invention, the situation with sheet feeding device without rotation amount sensing part and calculating section is compared, and the separation of sheet material can more accurately be optimized in load control unit.
According to the tenth aspect of the invention, except the effect being reached by ninth aspect present invention, compared with situation about not being shifted in linkage with the movement of sending parts with delivery status sensing cell, the more accurately delivery status of sensing sheet material.
According to an eleventh aspect of the invention, compared with the situation that there is no like this structure with sheet feeding device, can be easily and the delivery status of sensing sheet material more accurately.
According to a twelfth aspect of the invention, except by the present invention first to the tenth on the one hand in the effect that reaches of either side, compared with the situation that not have so to construct with sheet feeding device, can be easily and the delivery status of sensing sheet material more accurately.
According to a thirteenth aspect of the invention, can be in the case of not hindering the delivery status of sensing sheet material the air-flow for floating sheet material.
According to a fourteenth aspect of the invention, except the effect being reached by the present invention's the tenth three aspects:, if do not need air-flow generating portion, can provide the image processing system without air-flow generating portion.
According to a fifteenth aspect of the invention, compared with the situation that there is no like this structure with image processing system, can be in the case of not hindering the air-flow for floating sheet material the easily delivery status of sensing sheet material.
According to a sixteenth aspect of the invention, except the effect being reached by first aspect present invention, compared with the situation that there is no like this structure with sheet feeding device, can realize the good separation of multiple stacking sheet materials.
According to a seventeenth aspect of the invention, except the effect being reached by the present invention the 16 aspect, compared with the situation that there is no like this structure with sheet feeding device, can realize the good separation of multiple stacking sheet materials.
According to an eighteenth aspect of the invention, except the effect being reached by the present invention the 17 aspect, compared with the situation that there is no like this structure with sheet feeding device, can realize the good separation of multiple stacking sheet materials.
Brief description of the drawings
Based on each figure below, exemplary embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the side view of the summary of image processing system according to an exemplary embodiment of the present invention;
Fig. 2 illustrates the system schematic of the summary of image processing system according to an exemplary embodiment of the present invention;
Fig. 3 has schematically shown the first exemplary embodiment and the circumferential component thereof of the paper feed unit of looking from top;
Fig. 4 A to 4C is the zoomed-in view of sending parts, sensing part and circumferential component thereof, wherein, Fig. 4 A to sheet material (for example sends parts for working as, paper) amplification front elevation when imposed load, Fig. 4 B is the enlarged side view in the time sending parts to sheet material imposed load, and Fig. 4 C is the enlarged side view of in the time sending parts not to sheet material imposed load (unloading condition);
Fig. 5 is the conceptual schematic view that the first example of the layout of the control system of paper feed unit is shown;
Fig. 6 is the process flow diagram of the processing (S10) that illustrates that control module control sends parts and be applied to the load on sheet material;
Fig. 7 shows that sliding distance is along with sending the curve map of the variation of distance between parts and sheet material;
Fig. 8 has schematically shown the second exemplary embodiment and the circumferential component thereof of the paper feed unit of looking from top;
Fig. 9 has schematically shown the 3rd exemplary embodiment and circumferential component thereof of the paper feed unit of looking from top;
Figure 10 has schematically shown the 4th exemplary embodiment and circumferential component thereof of the paper feed unit of looking from top;
Figure 11 has schematically shown the 5th exemplary embodiment and circumferential component thereof of the paper feed unit of looking from top;
Figure 12 A to 12C shows the modified example of sending parts, sensing part and circumferential component thereof, and wherein, Figure 12 A is the side view that the first modified example is shown, Figure 12 B is the side view that the second modified example is shown, and Figure 12 C is the top view that the 3rd modified example is shown;
Figure 13 A to 13C shows the 4th modified example of sending parts, sensing part and circumferential component thereof, wherein, Figure 13 A illustrates the front elevation of sending the state of parts to sheet material imposed load, Figure 13 B illustrates to send the not front elevation of the state to sheet material imposed load of parts, and Figure 13 C is the side view that state shown in Figure 13 B is shown;
Figure 14 A and 14B show the modified example that is arranged on the sensing part in the load applying part of rear end, and wherein Figure 14 A is the side view that the modified example of sensing part is shown, and Figure 14 B is the sectional view that the along continuous straight runs of the modified example of sensing part is shown;
Figure 15 is the conceptual schematic view that the second example of the layout of the control system of paper feed unit is shown;
Figure 16 is the right side view that the image processing system of the second exemplary embodiment according to the present invention is shown;
Figure 17 A and 17B show tripping device, carrying device, press device and delivery status sensing apparatus, and wherein Figure 17 A is that right side view and Figure 17 B are plan view;
Figure 18 is the skeleton view that the tripping device in the image processing system that is included in the second exemplary embodiment according to the present invention is shown;
Figure 19 is the right side view that the delivery status sensing apparatus in the image processing system that is included in the second exemplary embodiment according to the present invention is shown;
Figure 20 is the right side view that the first modified example of the delivery status sensing apparatus in the image processing system that is included in the second exemplary embodiment according to the present invention is shown;
Figure 21 A and 21B show the second modified example of the delivery status sensing apparatus in the image processing system that is included in the second exemplary embodiment according to the present invention, wherein Figure 21 A is the right side view in the time that sheet material does not float, and Figure 21 B is the right side view in the time that the uppermost sheet material of sheet stack floats;
Figure 22 is the block diagram that the control device in the image processing system that is included in the second exemplary embodiment according to the present invention is shown;
Figure 23 is the process flow diagram that the control of being undertaken by the control device being included in the image processing system of the second exemplary embodiment according to the present invention is shown;
Figure 24 A and 24B show the delivery status sensing apparatus in the image processing system that is included in the 3rd exemplary embodiment according to the present invention, and wherein Figure 24 A is that right side view and Figure 24 B are plan view;
Figure 25 is the block diagram that the control device in the image processing system that is included in the 3rd exemplary embodiment according to the present invention is shown;
Figure 26 is the process flow diagram that the control of being undertaken by the control device being included in the image processing system of the 3rd exemplary embodiment according to the present invention is shown;
Figure 27 A and 27B show the float state sensing apparatus in the image processing system that is included in the 4th exemplary embodiment according to the present invention, and wherein Figure 27 A is that right side view and Figure 27 B are plan view;
Figure 28 is the block diagram that the control device in the image processing system that is included in the 4th exemplary embodiment according to the present invention is shown;
Figure 29 is the process flow diagram that the control of being undertaken by the control device being included in the image processing system of the 4th exemplary embodiment according to the present invention is shown; And
Figure 30 is the skeleton view that the modified example of the float state sensing apparatus in the image processing system that is included in the 4th exemplary embodiment according to the present invention is shown.
Embodiment
Below, will be based on brief description of the drawings the first exemplary embodiment of the present invention.
In Fig. 1 and Fig. 2, show the summary of the image processing system 10 of the first exemplary embodiment according to the present invention.Image processing system 10 has apparatus main body 12, and image forming portion (image formation unit) 14 is installed in apparatus main body 12.Be provided with the discharge pallet 16 that will illustrate below at the top of apparatus main body 12, and to be provided with in the bottom of apparatus main body 12 be for example two-layer paper feed unit 18 (sheet feeding device).In addition, can optionally in the bottom of apparatus main body 12, multiple paper feed units be set.
Each paper feed unit (sheet feeding device) 18 has unit main body 20 and wherein can the stacking carton 22 sheet materials such as multipage paper.(along the front end of sheet material direction of transfer) is provided with and sends parts 24 near above carton 22 rear ends, and is provided with retardance roller 26 and donor rollers 28 sending parts 24 rears.This donor rollers 28 by unshowned drive unit drives and then rotation so that sheet material advance towards the main transfer path 32 that will illustrate below.Thereby retardance roller 26 can rotate along with the rotation of donor rollers 28 against donor rollers 28, and then rotation advances sheet material to cooperate with donor rollers 28 one by one towards main transfer path 32.For example, in the time that between donor rollers 28 and retardance roller 26, clamping has multiple sheet materials, retardance roller 26 only allows uppermost sheet material to slide in stacking sheet material, and prevents that the sheet material not contacting with donor rollers 28 from advancing.Thus, retardance roller 26 is for making sheet material separated from one another and only will be positioned at uppermost sheet material and pass out to main transfer path 21.
Main transfer path 32 is the sheet material passage from donor rollers 28 to escape hole 34.Main transfer path 32 is arranged on the rear portion (right side in Fig. 1) of apparatus main body 12, and has and approach vertical part to the fixing device 36 that will illustrate below from nethermost paper feed unit 18.Along main transfer path 32, be equipped with transfer device 42 and the image holding body 44 that will illustrate below in the provided upstream of fixing device 36.In addition, be equipped with registration roller 38 in the provided upstream of transfer device 42 and image holding body 44.Registration roller 38 temporarily stops the sheet material of advancing along main transfer path 32, and at given time by Web guide between transfer device 42 and image holding body 44.
In addition, near the escape hole 34 of main transfer path 32, be provided with distributing roller 40.
Thereby, in the time sending parts 24 send sheet material from the carton 22 of paper feed unit 18, guarantee that with cooperating of donor rollers 28 sheet material is separated from each other by retardance roller 26, and only by uppermost Web guide to main transfer path 32.Registration roller 38 temporarily stops this sheet material and carves in due course Web guide between the transfer device 42 and image holding body 44 that will illustrate below.Now, developer image is on sheet material, and then fixing device 36 carries out photographic fixing to the developer image after transfer printing.Afterwards, distributing roller 40 is discharged to sheet material to discharge pallet 16 from escape hole 34.
But the in the situation that of duplex printing, sheet material turns back to upset path.Particularly, before distributing roller 40, there are two stocks to prop up, are provided with switching mechanism 46 at take-off point.From take-off point to registration roller, 38 form upset path 48.Be provided with transfer roller 50a to 50c along upset path 48.The in the situation that of duplex printing, switching mechanism 46 is switched to the position of opening wide upset path 48, and distributing roller 40 starts reverse rotation before the back edge of sheet material is about to be discharged from roller 40 clampings.Thus, by Web guide, in upset path 48, and then sheet material also passes through fixing device 36 through registration roller 38, between transfer device 42 and image holding body 44.Finally, sheet material is discharged to and discharges pallet 16 from escape hole 34.
Image forming portion 14 is for example electro photography type and being made up of following part: such as the image holding body 44 of photoreceptor etc.; Charging device 56, it is to image holding body 44 uniform charging, and wherein charging device 56 is for example formed by charging roller; Optical exposure device 58, it projects sub-image in the image holding body 44 of being charged by charging device 56 by irradiation; Developing apparatus 60, it applies developer to the sub-image being formed in image holding body 44 by optical exposure device 58, makes thus sub-image visual; Such as the transfer device 42 of transfer roll etc., its by the developer image being generated by developing apparatus 60 to sheet material; Such as the cleaning device 62 of scraper plate etc., it removes residual developer particle from image holding body 44; And fixing device 36, it will be transferred to developer image melting on sheet material photographic fixing to sheet material by transfer device 42.Optical exposure device 58 is for example formed by sweep type laser explosure device.In the front portion of apparatus main body 12, this optical exposure device 58 is arranged in parallel with above-mentioned paper feed unit 18, and launches the light that crosses developing apparatus 60 and irradiate image holding body 44.Under the control of the control module 66 that optical exposure device 58 will illustrate in the back, irradiate image holding body 44.Irradiation position in image holding body 44 is corresponding to sub-image projection (writing) position P.
Handle box 64 is the box body that is wherein formed with image holding body 44, charging device 56, developing apparatus 60 and cleaning device 62 and allows to change together these assemblies.Discharge pallet 16 by opening, can touch handle box 64 and handle box is taken out from apparatus main body 12.
Image processing system 10 also including control module 66, temperature/humidity sensor 67, comprise user interface apparatus (UI equipment) 68 display, keyboard etc., memory storage 70, communicator 72 etc. such as HDD or CD unit etc.Control module 66 comprises CPU74 and storer 76 etc., and controls each assembly of image processing system 10.Temperature/humidity sensor 67 detected temperatures and humidity (environmental baseline) are also outputed to control module 66.
Like this, image processing system 10 comprises the function as computing machine, thereby and prints operation and such as regulating the processing such as the air-flow that produced by the blowning installation 90 that will illustrate below by carrying out from storage medium 78 or via the preassembled program of communicator 72.
UI equipment 68 can be used for exporting with the position of sheet material relevant information according to the result of scrambler 82,108 codings by illustrating below.
Then, the first exemplary embodiment of paper feed unit 18 is described.
Fig. 3 has schematically shown the first exemplary embodiment of the paper feed unit 18 of looking from top and the summary of circumferential component thereof.In paper feed unit 18, as mentioned above, send parts 24 and be arranged on the front end of sheet material direction of transfer.Paper feed unit 18 is also provided with: sensing part 84, it is formed by sensing roller 80 and scrambler 82, wherein sensing roller 80 rotates around itself and the turning axle of the turning axle almost parallel of sending parts 24, and the rotation amount (corresponding to position or the sliding mode of sending sheet material) of scrambler 82 to sensing roller 80 encoded; And rear end load applying part 86, its from top to sheet material imposed load.Sensing part 84 can be optical sensor of the sensing information relevant with the translocation distance of sheet material in the situation that of contact sheet not etc.
Sending parts 24 arranges like this:, regulate being stacked on the load that uppermost sheet material applies that is positioned in carton 22 by the load adjustment device 88 operating under the control of control module 66.Sensing roller 80 contacts with the uppermost sheet material that is positioned at being stacked in carton 22, and along with by sending the advancing (movement) of sheet material that parts 24 send and rotating.Scrambler 82 is encoded to the rotation amount of sensing roller 80, and coding result is outputed to control module 66.
Be provided with blowning installation (air-flow generation unit) 90 in a side of carton 22, thereby this blowning installation 90 is blown facing to the sheet material blow air being stacked in carton 22 towards the direction substantially vertical with sheet material direction of transfer.Blowning installation 90 is removably mounted in apparatus main body 12.Blowning installation 90 is blown with the sheet material blow air facing to being stacked in carton 22 sending region between parts 24 and rear end load applying part 86, wherein send parts 24 and rear end load applying part 86 from top to uppermost sheet material imposed load.Like this, blowning installation 90 is by blowing sheet material is floated towards sheet material.This prevents that sheet material is tending towards being close to each other, and then contributes to send parts 24 and discharge sheet material.
Be provided with passing through or the sheet sensor 91 of the positional information of sheet material for sensing sheet material in the downstream of carton 22 along sheet material direction of transfer.
Here, thus sensing part 84 and rear end load applying part 86 are positioned at by not hindering the air-flow being produced by blowning installation 90 outside the path of blowning installation 90 blow air.For example, sensing part 84 is positioned at the downstream of sending parts 24 along the blowing direction of blowning installation 90.Sensing part 84 for example can be positioned at the front of sending parts 24 along sheet material direction of transfer, or can locate like this:, this sensing part 84 along the front end of sheet material direction of transfer roughly corresponding to the position (within the scope that sensing part 84 can be installed that shadow region represents in by Fig. 3) of sending parts 24.
Next, explain and send parts 24, sensing part 84 and circumferential component thereof.
Fig. 4 A to 4C is the zoomed-in view of sending parts 24, sensing part 84 and circumferential component thereof.Fig. 4 A is the amplification front elevation in the time sending parts 24 to sheet material imposed load.Fig. 4 B is the enlarged side view in the time sending parts 24 to sheet material imposed load.Fig. 4 C is the enlarged side view of in the time sending parts 24 not to sheet material imposed load (unloading condition).
Send that parts 24 are rotatably supported by support component 92 and can be to sheet material imposed load.Thereby sensing part 84 is supported by support component 94 and is pushed and can be made sensing roller 80 contact sheets by the elastomeric element such as such as spring 96.Support component 94 can be shifted along roughly vertical direction with respect to support component 92, and is provided with retainer 98 on the top of this support component 94.This retainer 98 limits the movement of support component 94 with respect to support component 92.
Like this, as shown in Fig. 4 A and 4B, when pressing support component 92 downwards by unshowned elastomeric element so that when sending parts 24 sheet material being applied to specified load, support component 94 forms and contacts with sheet material due to the pushing force of elastomeric element 96.
On the other hand, as shown in Figure 4 C, when by unshowned elastomeric element upwards lifting support component 92 so that when sending parts 24 and departing from sheet material, support component 94 is moved down into the stop position of retainer 98 and leaves sheet material with respect to support component 92 due to the pushing force of elastomeric element 96.
Fig. 5 is the conceptual schematic view that the first example of the layout of the control system of paper feed unit 18 is shown.The control system of paper feed unit 18 is made up of controller included in control module 66 100, load adjustment device (load applying actuator) 88, object to be controlled 102 and sliding distance calculating section 104.Controller 100 receives for the preset expected value of sliding distance and the result of calculation of sliding distance calculating section 104 of sending parts 24, and carries out controls such as the proportional control to load adjustment device 88.Load adjustment device 88 is by sending the displacement of parts 24 and thereby the corresponding operational ton of control of controller 100 is controlled object 102 to be controlled.Object 102 to be controlled comprises sends parts 24, sheet sensor 91 and sheet material.According to the control of load adjustment device 88, send parts 24 sheet material is applied to predetermined load, and sheet sensor 91 is exported the numerical value of sheet material position (X2) to sliding distance calculating section 104.Sliding distance calculating section 104 receives the numerical value of the expectation sheet material position (X1) being for example stored in storer 76 and the numerical value of the sheet material position (X2) of being exported by object 102 to be controlled, to calculate the sliding distance (XS=X1-X2) of sheet material, and result of calculation (observed range) is fed back in controller 100.
Fig. 6 illustrates that control module 66 controls the process flow diagram of sending the processing (S10) that parts 24 are applied to the load on sheet material.
As shown in Figure 6, in step 100 (S100), control module 66 makes to send parts 24 via load adjustment device 88 and forms and contact with sheet material.
In step 102 (S102), control module 66 starts such as the rotation of sending the rollers such as parts 24, donor rollers 28 and retardance roller 26.
In step 104 (S104), sliding distance calculating section 104 calculates the sliding distance (XS=X1-X2) of sheet material.
In step 106 (S106), the operational ton of control module 66 assumed (specified) load regulating devices 88 is to make the sliding distance being calculated by sliding distance calculating section 104 equal the expectation value of the sliding distance shown in Fig. 7.
As shown in Figure 7, sheet material sliding distance should with send distance roughly proportional (be applied to the minimizing degree of pressing force sheet material on) of parts 24 apart from sheet material.
In step 108 (S108), load adjustment device 88 is proofreaied and correct and is sent parts 24 and be applied to the load on sheet material according to the operational ton being calculated by control module 66.
In step 110 (S110), control module 66 judges whether sheet sensor 91 has sensed sheet material.Sense sheet material if be judged as, process and proceed to step S112 so; Otherwise, process and proceed to step S104.
In step 112 (S112), control module 66 makes to send parts 24 via load adjustment device 88 and is displaced to the not position to sheet material imposed load (off-load).
In step 114 (S114), control module 66 judges whether to complete the feeding sheet materials to image forming portion 14.If completed feeding sheet materials, process and proceed to step S116 so; Otherwise, process and continue.
In step 116 (S116), control module 66 stops such as rotation that sending the rollers such as parts 24, donor rollers 28 and retardance roller 26.
Next, the second exemplary embodiment of paper feed unit 18 is described.
Fig. 8 has schematically shown the second exemplary embodiment and the circumferential component thereof of the paper feed unit 18 of looking from top.As shown in Figure 8, paper feed unit 18 can be arranged to: scrambler 82 is encoded to the rotation amount of two sensing rollers 80 that are arranged on two ends.At blowning installation 90, towards the direction substantially vertical with sheet material direction of transfer blown, scrambler 82 and sensing roller 80 can be positioned at the downstream of sending parts 24 along sheet material direction of transfer.
Fig. 9 has schematically shown the 3rd exemplary embodiment and circumferential component thereof of the paper feed unit 18 of looking from top.As shown in Figure 9, be provided with additional blow gas device 106 in the modification of paper feed unit 18, this additional blow gas device 106 is blown facing to carton 22 from the downstream of sheet material direction of transfer.
Here, sensing part 84 and sending outside the path that parts 24 are arranged on the air blowing from blowning installation 90 and blowning installation 106, thus can not hinder the air-flow being produced by blowning installation 90 and the air-flow being produced by blowning installation 106.
Figure 10 has schematically shown the 4th exemplary embodiment and circumferential component thereof of the paper feed unit 18 of looking from top.As shown in figure 10, the modification of paper feed unit 18 can be provided with the blowning installation 90 of blowing towards the direction substantially vertical with sheet material direction of transfer and the blowning installation 106 of blowing facing to carton 22 from the downstream of sheet material direction of transfer.In addition, paper feed unit 18 can be configured with and be arranged on the scrambler 82 of sending the scrambler 108 of the coaxial rotating on parts 24 and the rotation amount of sensing roller 80 being encoded.
Here, sensing part 84 and send outside the path that parts 24 are arranged on the air blowing out from blowning installation 90 and blowning installation 106 and try one's best position far away, thus avoid hindering the air-flow being produced by blowning installation 90 and the air-flow being produced by blowning installation 106 as far as possible completely.
Figure 11 has schematically shown the 5th exemplary embodiment and circumferential component thereof of the paper feed unit 18 of looking from top.As shown in figure 11, the modification of paper feed unit 18 can be provided with the blowning installation 90 of blowing towards the direction substantially vertical with sheet material direction of transfer and the blowning installation 106 of blowing facing to carton 22 from the downstream of sheet material direction of transfer.In this paper feed unit 18, sensing part 84 can be arranged in rear end load applying part 86.
Here, sensing part 84 and send outside the path that parts 24 are arranged on the air blowing out from blowning installation 90 and blowning installation 106 and try one's best position far away, thus directly do not hinder the air-flow being produced by blowning installation 90 and the air-flow being produced by blowning installation 106.
Next, the modified example of sending parts 24, sensing part 84 and circumferential component thereof is described.
Figure 12 A to 12C shows the modified example of sending parts 24, sensing part 84 and circumferential component thereof.Figure 12 A is the side view that the first modified example is shown.Figure 12 B is the side view that the second modified example is shown.Figure 12 C is the top view that the 3rd modified example is shown.
As shown in Figure 12 A, send parts 24 and supported by the support component 112 that can swing around axle 110.Voice coil motor 116 moves up and down can be by the support component 112 of the elastomeric element such as such as spring 114 pull-ups.Thus, sending parts 24 can be shifted vertically with to sheet material imposed load and off-load.
As shown in Figure 12 B, sending parts 24 and scrambler 108 is supported by the support component 112 that can swing around axle 110.Rotation DC motor 118 moves up and down via gear 120,122 can be by the support component 112 of the elastomeric element such as such as spring 114 pull-ups.Thus, sending parts 24 can move vertically with to sheet material imposed load and off-load.
As shown in Figure 12 C, drive and send parts 24 via axle 126 and gear 128,130,132 by the rotation of turning motor 124.Utilize respectively scrambler 108,82 to detect and send the rotation amount of parts 24 and the rotation amount of sensing roller 80.Thus, control module 66 can be controlled the vertical displacement of sending parts 24 to sheet material imposed load and off-load.
Figure 13 A to 13C shows the 4th modified example of sending parts 24, sensing part 84 and circumferential component thereof.Figure 13 A illustrates the front elevation of sending the state of parts 24 to sheet material imposed load.Figure 13 B illustrates to send the not front elevation of the state to sheet material imposed load of parts 24.Figure 13 C is the side view that state shown in Figure 13 B is shown.
Send parts 24 and scrambler 108 is supported by support component 134a, 134b.Support component 134a, 134b can swing around axle 135 according to the control of control module 66 (not shown).On it, be fixed with the axle 135 of gear 136 by unshowned driver drives.Along with axle 135 is activated, send parts 24 via gear 136,138,140 rotations.Scrambler 108 is encoded to the rotation amount of sending parts 24.Sensing roller 80 and scrambler 82 are supported by support component 142a, 142b.Spring 144 is via scrambler 82 pushing sensing roller 80 downwards.Send parts 24 so that it contacts with sheet material along with support component 134a, 134b move down, sensing roller 80 starts and rotates in contact by sending the sheet material that parts 24 send.
Support component 134b is provided with lift portion 146.Under the control of control module 66, along with support component 134a, 134b move up, send and on parts 24, move and leave sheet material.Meanwhile, lift portion 146 lifting support component 142a, and then sensing roller 80 also departs from sheet material.Like this, when regulating by control module 66 when sending parts 24 and being applied to the load on sheet material, sensing part 84 with send parts 24 and be shifted in linkage.
Figure 14 A and 14B show the modified example that is arranged on the sensing part 84 in rear end load applying part 86.Figure 14 A is the side view that the modified example of sensing part 84 is shown.Figure 14 B is the sectional view that the along continuous straight runs of the modified example of sensing part 84 is shown.Sensing roller 80 and scrambler 82 are supported by support component 148.Support component 148 can swing and be pushed by spring 154 around axle 150, and one end of spring 154 is fixed by spring support member 152.By this pushing force, sensing roller 80 is to being stacked on the rear end imposed load that is positioned at uppermost sheet material in the sheet material in carton 22.Therefore, in the time sending parts 24 and send uppermost sheet material, sensing roller 80 forms and contacts with being positioned at uppermost sheet material in the sheet material being stacked in carton 22, and along with sheet material is advanced (sheet material displacement) and rotates.Scrambler 82 is encoded to the rotation amount of sensing roller 80, and coding result is outputed to control module 66.Retainer 156 limits support component 148 and moves down.
Next, the second example of the layout of the control system of paper feed unit 18 is described.
Figure 15 is the conceptual schematic view that the second example of the layout of the control system of paper feed unit 18 is shown.The control system of paper feed unit 18 is made up of controller included in control module 66 100, load adjustment device (load applying actuator) 88, object to be controlled 160 and sliding distance calculating section 104.
In the second example of the layout of the control system of paper feed unit 18, to being marked with identical Reference numeral with part roughly the same in the first example of the layout of the control system shown in Fig. 5.Object 160 to be controlled comprises sends parts 24, sensing part 84, sheet sensor 91 and sheet material.According to the control of load adjustment device 88, send parts 24 sheet material is applied to predetermined load.In this, scrambler 82 is encoded to the rotation amount of sensing roller 80, then detect the position (X1) of sheet material, and sheet sensor 91 detects the position (X2) of sheet material.These numerical value X1 and X2 are outputed to sliding distance calculating section 104.Be included in the numerical value that sliding distance calculating section 104 in control module 66 receives X1 and X2, to calculate the sliding distance (XS=X1-X2) of sheet material, and result of calculation (observed range) fed back in controller 100.
Then, the image processing system 210 based on brief description of the drawings second exemplary embodiment according to the present invention.
Figure 16 shows the summary of the image processing system 210 of the second exemplary embodiment according to the present invention.
Image processing system 210 has apparatus main body 212, and is provided with discharge pallet 216 at the top of apparatus main body 212.Following part is installed in apparatus main body 212: image forming portion 214; Stack device 300, wherein stacking have multiple sheet materials; Tripping device 400, its separating piled multiple sheet materials in stack device 300; Carrying device 500, it has outlet roller 502, and this outlet roller 502 is as the parts of sending of sending the sheet material that separated by tripping device 400 along direction of transfer towards downstream; Press device 600, it is used as outlet roller 502 by the unit of pressing being pressed on sheet material; Delivery status sensing apparatus 700, the delivery status sensing cell of the delivery status of its sheet material of being sent by donor rollers 502 as sensing; And control device 900, it uses the unit that acts on load control, air-flow control and setting.
In apparatus main body 212, be formed with the transfer path 218 for transmitting sheet material.Also be arranged on the front (left side in Figure 16) of apparatus main body 212 as the guidance panel 950 of operating unit.
Guidance panel 950 has numeric keypad etc., and for inputting sheet material quantity, on it, will form type, the size etc. of the sheet material of image.Can also input sheet material quantity from the operating means such as such as the personal computer (not shown) being connected with control device 900, it, will form type, the size etc. of the sheet material of image, thereby replace via guidance panel 950 these information of input.
Image forming portion 214 is for electro photography type and comprise following part: as the drum type photoreceptor 220 of image holding body; Charging device 222, it is to photoreceptor 220 uniform charging; Exposure device 224, it is exposed to sub-image on the photoreceptor 220 being charged by charging device 222 by illumination; Developing apparatus 226, it utilizes developer to develop to be formed on the lip-deep sub-image of photoreceptor 220 by exposure device 224, thereby makes sub-image visual; Transfer device 228, it will be by the visual developer image of developing apparatus 226 to sheet material, and wherein transfer device 228 is for example formed by transfer roll; Cleaning device 230, it removes residual developer particle from photoreceptor 220; And fixing device 232, it will be transferred in developer image melting on sheet material photographic fixing to sheet material by transfer device 228.Among each parts of composing images forming section 214, photoreceptor 220, charging device 222, developing apparatus 226 and cleaning device are formed integrally as image forming structure body 234.For example can this structure be installed to from the front side of apparatus main body 212 apparatus main body 212 and from apparatus main body 212 and take out.
For example can pull out stack device 300 from the front side of apparatus main body 212, or for example can stack device 300 be installed to from the front side of apparatus main body 212 to taking-up apparatus main body 212 and from apparatus main body 212.Other sheet material can be placed in stack device 300 in pull-out from apparatus main body 212 or after taking out stack device 300.
Stack device 300 comprises: stack device main body 302; Lifter plate 304, it can move up and down with respect to stack device main body 302; And motor 306, it is with acting on the drive source that moves up and down lifter plate 304 with respect to stack device main body 302.Utilize not shown residue sheet sensor to detect remaining sheet material quantity in stack device 300.By according to the testing result control motor 306 of residue sheet sensor, to regulate the vertical movement of lifter plate 304, uppermost the sheet stack on lifter plate 304 sheet material P1 can be positioned to constant height level thereby no matter remain how many sheet materials.
In apparatus main body 212, along transfer path 218, be furnished with forward above-mentioned carrying device 500, transfer roller 236, retardance roller 238, registration roller 240, above-mentioned transfer device 228, above-mentioned fixing device 232 and distributing roller 242 along sheet material direction of transfer.Transfer roller 236 is for transmitting downstream the sheet material of being sent by outlet roller 502.Retardance roller 238 is mounted to against transfer roller 236, and has and make multiple sheet materials function separated from one another of sending from outlet roller 502.Like this, if send stacked and two of there is no separated device 400 separator wells or multiple sheet materials more, will utilize so retardance roller 238 by separated from one another these sheet materials.Registration roller 240 for guide the sheet material sent from carrying device 500 with and the image of image forming portion 214 form the moment that operation time period matches and make sheet material pass through the contact position between photoreceptor 220 and transfer device 228.Distributing roller 242 is for discharging pallet 216 by having the sheet material of developer image to be discharged to by fixing device 232 photographic fixing on it.
In the downstream of transfer roller 236 and retardance roller 238, the sheet sensor (paper sensor) 750 for sensing sheet material is installed along sheet material direction of transfer.To be input to control device 900 from the signal of sheet sensor 750.
In the image processing system 210 of as above structure, charging device 222 is to photoreceptor 220 uniform charging, and on the photoreceptor 220 of the irradiation by optical exposure device 224 after charging, generates sub-image based on picture signal.Developing apparatus 226 utilizes developer to develop to this sub-image, so generate developer image.Meanwhile, tripping device 400 separates the sheet material being stacked in stack device 300, and sends separated sheet material by carrying device 500.Registration roller 240 and the image of image forming portion 214 form moment that operation time period matches by sent Web guide between transfer device 228 and photoreceptor 220, and then transfer device 228 by developer image to guided sheet material.Fixing device 232 to sheet material, and is discharged to the developer image fixing after transfer printing to discharge on pallet 216 by the sheet material that distributing roller 242 is gone up photographic fixing and had developer image.
In Figure 17 A and 17B, show tripping device 400, carrying device 500, press device 600 and delivery status sensing apparatus 700.
As shown in Figure 17 A, tripping device 400 is arranged on the right side of sheet stack, thereby can supply with air-flow to sheet stack from right side.To describe tripping device 400 below in detail.
As mentioned above, carrying device 500 has outlet roller 502, and this outlet roller 502 is as the parts of sending of sending the sheet material that separated by tripping device 400 along direction of transfer towards downstream.The motor M2 that is used as the drive source of outlet roller 502 is connected with outlet roller 502 via gear G1, G2, G3, G4 and G5.As shown in Figure 17 A, the position that outlet roller 502 can contact at the uppermost sheet material P1 of itself and sheet stack and its leave between the position of sheet material P1 and move.Motor M2 is connected with control device 900 and is controlled by control device 900.
Press device 600 has framework 604, gear G12 and motor M1, and this framework is rotatably supported on the axle 602 being fixed on apparatus main body 212.
Framework 604 is supported to and allows said gear G3, G4, G5 and outlet roller 502 to rotate.Allow gear G3, G4, G5 and outlet roller 502 in rotary moving with respect to apparatus main body 212 together with framework 604.For example in a part for the right plate of framework 604, be formed with outshot, and be formed with gear G10 on this outshot.
Motor M1 is connected with gear G10 via gear G12.Like this, the driving force of motor M1 is delivered on framework 604 via gear G12 and G10, and then framework 604 is moving when axle 602 rotates.Along with the movement of framework 604, the outlet roller 502 being fixed on framework 604 moves together.Like this, outlet roller 502 can not move between the position of contact sheet P1 at the position of its pressure contact sheet material P1 and its, and the pressing force (load) being applied on sheet material P1 changes the position along with framework 604.Motor M1 is connected with control device 900 and is controlled by control device 900.
Delivery status sensing apparatus 700 comprises: roller 702, and it is as the rotatable parts that contact with sheet material P1 and rotate with this sheet material; And first rotary encoder 704, it measures the sheet material traverse measurement unit of the movement of sheet material P1 as the rotation amount based on roller 702.The output of the first rotary encoder 704 is input to control device 900.To describe delivery status sensing apparatus 700 below in detail.
In Figure 18, show tripping device 400.
Tripping device 400 comprises: the casing 402 of hollow, is wherein formed with the gas outlet 404 as airflow blow opening; Blower fan 406, it produces the air-flow of casing 402 to be supplied to; And conduit 408, its connect box 402 and blower fan 406.Tripping device 400 will enter air via conduit 408 and be sent to casing 402 from blower fan 406, and face toward from gas outlet 404 the sheet material blow flow being stacked on stack device 300, thus by multiple sheet separation that are stacked in stack device 300.
Blower fan 406 is connected with control device 900, controls air capacity that time per unit blows facing to sheet material etc. by control device 900.
In Figure 19, show delivery status sensing apparatus 700.
As mentioned above, delivery status sensing apparatus 700 has roller 702 and the first rotary encoder 704, and the pressing component 708 that comprises tilting member 706 and formed by the elastic body such as such as volute spring.
Tilting member 706 is supported on back shaft 246 swingably, and can rotate with respect to apparatus main body 212 around back shaft 246.In the upstream of sheet material direction of transfer, near one end of tilting member 706, roller 702 is rotatably supported on turning axle 712.In the downstream of sheet material direction of transfer, near the other end of tilting member 706, one end of pressing component 708 is fixed on tilting member.The other end of pressing component 708 is fixed on apparatus main body 212.
The turning axle 712 of roller 702 is positioned at upstream region u instead of the downstream area d of back shaft 246 along sheet material direction of transfer.
In delivery status sensing apparatus 700, tilting member 706 parts 708 that are pressed along the end in the downstream of sheet material direction of transfer push and pull-up.Utilize this pushing force, tilting member 706 around back shaft 246 rotates by roller 702 by being pressed on sheet material P1.Determine like this pushing force of pressing component 708:, in the time floating sheet material P1 from the air-flow of tripping device 400, this pushing force keeps roller 702 contact with sheet material P1 and make the vertical movement of roller 702 follow the vertical movement of sheet material P1.
In Figure 20, show the first modified example of delivery status sensing apparatus 700.
The delivery status sensing apparatus 700 of above-mentioned exemplary embodiment has pressing component 708, and this pressing component 708 by roller 702 by being pressed on sheet material P1.But the delivery status sensing apparatus 700 of the first modified example does not have pressing component 708, and by be applied to gravity on roller 702 etc. by roller 702 by being pressed on sheet material P1.
In the first modified example, the turning axle 712 of roller 702 is arranged in upstream region u instead of the downstream area d of back shaft 246 along sheet material direction of transfer equally.In Figure 20, for being marked with identical Reference numeral with part corresponding in the delivery status sensing apparatus 700 of above-mentioned exemplary embodiment, and the description thereof will be omitted.
In Figure 21 A and 21B, show the second modified example of delivery status sensing apparatus 700.
The delivery status sensing apparatus 700 of the second modified example comprises limiting part 716, and does not comprise this limiting part in the delivery status sensing apparatus 700 of above-mentioned exemplary embodiment.
Limiting part 716 is arranged near of the back shaft 246 of apparatus main body 212, and has the swing of tilting member 706 is limited to function within the specific limits.In other words,, in the time that the air-flow of supplying with from tripping device 400 floats sheet material P1, as shown in Figure 21 B, roller 702 also rises along with the rising of sheet material P1.Even the clockwise swing rotary of tilting member 706 in Figure 21 B, but its swing also can be restricted in the time that this tilting member 706 is encountered limiting part 716.Along with the swing of tilting member 706 is restricted, the rising of roller 702 is restricted.As a result, along with the rising of roller 702 is restricted, the rising of sheet material P1 is restricted.As mentioned above, in the delivery status sensing apparatus 700 of the second modified example, limit sheet material because the air-flow of supplying with from tripping device 400 rises by roller 702.
In Figure 22, show control device 900.
Control device 900 comprises the control circuit 902 for example being formed by CPU.Via communication interface 904, view data is input to control circuit 902, and by the output from the first rotary encoder 704, be input to control circuit 902 from the output of guidance panel 950 and from the output of sheet sensor 750.According to control image forming portion 214, motor M1, motor M2 and blower fan 406 from the output of control circuit 902.
Figure 23 shows the control flow of control device 900.
As shown in figure 23, for example, in the time view data being input to control circuit 902 via communication interface 904, start control program.In step S102, send speed or the interval of sheet material according to outlet roller 502, control device 900 set press device 600 by outlet roller 502 by the initial value that is pressed in the load on sheet material.Thereby control circuit driving motor M1 with the load that sets by outlet roller 502 by being pressed on sheet material P1.
In step S104, control device 900 starts to drive the blower fan 406 in tripping device 400, thereby starts facing to sheet stack blow flow.
In next step S106, control device 900 starts driving motor M2, thereby starts to rotate outlet roller 502 and start to send sheet material.
In next step S108, control device 900 indicates the first rotary encoder 704 to measure the movement (displacement) of sheet material.
In next step S120, movement and the predetermined reference value of control device 900 to the sheet material of measuring in step S108 compares.If the movement of the sheet material of measuring in step S108 (amount of movement) equals predetermined reference value, controller proceeds to step S202 and does not change outlet roller 502 by the load being pressed on sheet material so, and former state keeps load.If the movement of the sheet material of measuring in step S108 is greater than predetermined reference value, controller proceeds to step S122.If the movement of the sheet material of measuring in step S108 is less than predetermined reference value, controller proceeds to step S126.
In step S122, controller judges whether outlet roller 502 has been reached to predetermined load lower limit by the current load being pressed on sheet material.If reached lower limit, to proceed to step S202 and do not change outlet roller 502 be that former state keeps load by being pressed in load on sheet material to controller.Otherwise if outlet roller 502 is not reached to lower limit by the current load being pressed on sheet material, controller proceeds to step S124 so.
In step S124, the motor M1 of control device 900 driving needle to press device 600, and reduce outlet roller 502 by the load being pressed on sheet material.Reduce outlet roller 502 can reduce by the load being pressed on sheet material the possibility of damaging sheet material.Do not reach lower limit owing to judging load in step S122, even if reduce load, there will not be outlet roller 502 problem bad to sending of sheet material yet.
In step S126, controller judges whether outlet roller 502 has been reached to the predetermined load upper limit by the current load being pressed on sheet material.If reached the upper limit, to proceed to step S202 and do not change outlet roller 502 be that former state keeps load by being pressed in load on sheet material to controller.Otherwise if outlet roller 502 is not reached to the upper limit by the current load being pressed on sheet material, controller proceeds to step S128 so.
In step S128, the motor M1 of control device 900 driving needle to press device 600, and increase outlet roller 502 by the load being pressed on sheet material.Increase outlet roller 502 by the movement that is pressed in load on sheet material and contributes to the sheet material of being sent by outlet roller 502.Owing to determining in step S126 that load does not reach the upper limit, even if therefore increase load, also there will not be outlet roller 502 to damage the situation of sheet material.
In step S202, judge whether sheet sensor 750 has detected the leading edge of sheet material, and controller turns back to step S108 until determine the leading edge that sheet material detected.When determine the leading edge that sheet material detected in step S202, controller proceeds to step S204.
In step S204, control device 900 driving motor M1 and make outlet roller 502 leave sheet material, the load of removal outlet roller 502 to sheet material thus.
Although illustrated that in above-mentioned instructions control device 900 controls outlet roller 502 by the control flow that is pressed in the load on sheet material, control device 900 is also carried out the control to blower fan.In other words, control device 900 is also as the control module of controlling the air-flow of supplying with from tripping device 400.For example, according to the type of the sheet material of specifying from guidance panel 950 or size, controller is for example controlled the airshed blowing facing to sheet material.
Figure 24 A and 24B show the delivery status sensing apparatus 700 in the image processing system that is included in the 3rd exemplary embodiment according to the present invention.
The delivery status sensing apparatus 700 of above-mentioned the second exemplary embodiment has roller 702 and the first rotary encoder 704, the movement that this first rotary encoder 704 is connected and measures for the rotation amount based on roller 702 sheet material with roller 702.In addition, the delivery status sensing apparatus 700 of the 3rd exemplary embodiment of the present invention comprises the second rotary encoder 730, the surface of contact traverse measurement unit of the movement of the rotating surface 502a that this second rotary encoder 730 contacts with sheet material P1 as measurement outlet roller 502.
Figure 25 shows the control device 900 in the image processing system that is included in the 3rd exemplary embodiment according to the present invention.
In the control device 900 of above-mentioned the second exemplary embodiment, by the output from the first rotary encoder 704, be input in control circuit 902 from the output of guidance panel 950 and from the output of sheet sensor 750.Being included in according in the control device 900 in the image processing system 210 of the 3rd exemplary embodiment, also will be input in control circuit 902 from the output of the second rotary encoder 730.As being included according to the situation of the control device 900 in the image processing system 210 of the second exemplary embodiment, by control image forming portion 214, motor M1, motor M2 and blower fan 406 from the output of control circuit 902.
Figure 26 shows the control flow that the control device 900 in the image processing system 210 that is included in the 3rd exemplary embodiment according to the present invention carries out.
In above-mentioned the second exemplary embodiment, in step S108, the movement that control device 900 indicates the first rotary encoder 704 to measure sheet material.In step S120 below, movement and the predetermined reference value of controller to the sheet material of measuring in step S108 compares.According to output control relatively by outlet roller 502 by the load being pressed on sheet material.
In the 3rd exemplary embodiment, in step S108, indicate after the first rotary encoder 704 measures the movement of sheet material the movement that control device 900 indicates the second rotary encoder 730 to measure the rotating surface 502a of outlet roller 502 in step S110 at control device 900.In step S140 subsequently, the movement of the movement of controller to measured sheet material and measured rotating surface 502a compares.According to result relatively, controller control by outlet roller 502 by the load being pressed on sheet material.
More specifically, in step S140, the movement of control device 900 to sheet material measured in step S108 and in step S110 the movement of measured rotating surface 502a compare.If the difference between two measured values equals predetermined reference value, controller proceeds to step S202 and does not change outlet roller 502 by the load being pressed on sheet material so, and former state keeps load.If the difference between two measured values is less than reference value, controller proceeds to step S142.If the difference between two measured values is greater than reference value, controller proceeds to step S146.
In step S142, controller judges whether outlet roller 502 has been reached to predetermined load lower limit by the current load being pressed on sheet material.If load has reached lower limit, to proceed to step S202 and do not change outlet roller 502 be that former state keeps load by being pressed in load on sheet material to controller.Otherwise if outlet roller 502 is not reached to lower limit by the current load being pressed on sheet material, controller proceeds to step S144.
In step S144, the motor M1 of control device 900 driving needle to press device 600, and reduce outlet roller 502 by the load being pressed on sheet material.Reduce outlet roller 502 can reduce by the load being pressed on sheet material the possibility of damaging sheet material.Owing to having determined that in step S142 load does not reach lower limit, even if therefore reduce load, also there will not be for example because the slip occurring between outlet roller 502 and sheet material causes the problem bad to sending of sheet material by outlet roller 502.
In step S146, controller judges whether outlet roller 502 has been reached to the predetermined load upper limit by the current load being pressed on sheet material.If reached the upper limit, to proceed to step S202 and do not change outlet roller 502 be that former state keeps load by being pressed in load on sheet material to controller so.Otherwise if outlet roller 502 is not reached to the upper limit by the current load being pressed on sheet material, controller proceeds to step S148.
In step S148, the motor M1 of control device 900 driving needle to press device 600, and increase outlet roller 502 by the load being pressed on sheet material.Increase outlet roller 502 can be reduced to the movement that the possibility of sliding occurs between outlet roller 502 and sheet material and contribute to the sheet material of being sent by outlet roller 502 by being pressed in load on sheet material.Owing to having determined that in step S146 load does not reach the upper limit, even if therefore increase load, also there will not be outlet roller 502 to damage the situation of sheet material.
Control step except illustrated above step is identical with above-mentioned the first exemplary embodiment, be marked with identical label (step number), and the description thereof will be omitted in Figure 26.
Figure 27 A and 27B show carrying device 500, press device 600 and the circumferential component thereof in the image processing system 210 of the 4th exemplary embodiment according to the present invention.
Comprise the delivery status sensing apparatus 700 for the delivery status of sensing sheet material according to the image processing system 210 of above-mentioned the second exemplary embodiment with according to the image processing system 210 of above-mentioned the 3rd exemplary embodiment.Optionally, comprise that according to the image processing system 210 of the 4th exemplary embodiment float state sensing apparatus 650 is to replace delivery status sensing apparatus 700.
The float state sensing cell of the float state of the sheet material that the air-flow that float state sensing apparatus 650 is supplied with from tripping device 400 as sensing floats, and there is laser extensometer 652.The top of the uppermost sheet material P1 of sheet stack that this laser extensometer 652 is arranged in stack device 300, and detect the height of the sheet material P1 topmost floating from sheet stack.In Figure 27 A and Figure 27 B, be marked with identical Reference numeral for part corresponding to the first exemplary embodiment, and the description thereof will be omitted.
Figure 28 shows the control device 900 in the image processing system 210 that is included in the 4th exemplary embodiment according to the present invention.In above-mentioned the second exemplary embodiment, by the output from the first rotary encoder 704, be input in control circuit 902 from the output of guidance panel 950 and from the output of sheet sensor 750.In the 4th exemplary embodiment, be input in control circuit 902 by the output from laser extensometer 652 instead of from the output of the first rotary encoder 704.As the situation in the second exemplary embodiment, to be input in control circuit 902 from the output of guidance panel 950 and sheet sensor 750, and by control image forming portion 214, motor M1, motor M2 and blower fan 406 from the output of control circuit 902.
Figure 29 shows the control flow that the control device 900 in the image processing system 210 that is included in the 4th exemplary embodiment according to the present invention carries out.
In above-mentioned the second exemplary embodiment, in step S108, the movement that control device 900 indicates the first rotary encoder 704 to measure sheet material.In step S120 subsequently, movement and the predetermined reference value of controller to the sheet material of measuring in step S108 compares.According to result relatively, control and be used for outlet roller 502 by the load being pressed on sheet material.
In the 4th exemplary embodiment, in step S158, control device 900 indicates laser extensometer 652 to detect the float state (height or levitation height) of sheet material.In step S160 subsequently, controller compares levitation height measured in step S158 and predetermined levitation height.According to result relatively, controller control is used for outlet roller 502 by the load being pressed on sheet material.
More specifically, in step S160, control device 900 compares levitation height measured in step S158 and predetermined reference value.If there is not difference between measured levitation height and reference value, controller proceeds to step S202 and does not change outlet roller 502 by the load being pressed on sheet material, and former state keeps load.If measured levitation height is greater than reference value, controller proceeds to step S162.If measured levitation height is less than reference value, controller proceeds to step S166.
In step S162, controller judges whether outlet roller 502 has been reached to predetermined load lower limit by the current load being pressed on sheet material.If load has reached lower limit, controller proceeds to step S202 and does not change outlet roller 502 by the load being pressed on sheet material, and former state keeps load.Otherwise if outlet roller 502 is not reached to lower limit by the current load being pressed on sheet material, controller proceeds to step S164.
In step S164, the motor M1 of control device 900 driving needle to press device 600, and reduce outlet roller 502 by the load being pressed on sheet material.Reduce outlet roller 502 can reduce by the load being pressed on sheet material the possibility of damaging sheet material.Owing to having determined that in step S162 load does not reach floating higher than reference value of lower limit and sheet material, therefore can expect that uppermost sheet material P1 obtains good separation, even if reduce load, also there will not be the problem bad to sending of sheet material by outlet roller 502.
In step S166, controller judges whether outlet roller 502 has been reached to the predetermined load upper limit by the current load being pressed on sheet material.If reached the upper limit, to proceed to step S202 and do not change outlet roller 502 be that former state keeps load by being pressed in load on sheet material to controller.Otherwise if outlet roller 502 is not reached to the upper limit by the current load being pressed on sheet material, controller proceeds to step S168.
In step S168, the motor M1 of control device 900 driving needle to press device 600, and increase is used for outlet roller 502 by the load being pressed on sheet material.Even if it is insufficient that the levitation height of sheet material is less than the separation of reference value and uppermost sheet material P1, but increase, outlet roller 502 can be convenient to send well sheet material by the load being pressed on sheet material.Owing to having determined that in step S166 load does not reach the upper limit, even if therefore increase load, also there will not be outlet roller 502 to damage the situation of sheet material.
Control step except illustrated above step is identical with above-mentioned the first exemplary embodiment, be marked with identical label (step number), and the description thereof will be omitted in Figure 29.
Figure 30 shows the modified example of float state sensing apparatus 650.
The float state sensing apparatus 650 of this modified example comprises video camera 660, and this video camera 660 is taken the image capturing device of the image of sheet stack as the direction from including the component perpendicular to sheet-stacking direction.Video camera 660 is connected with control device 900 via image data processing system 662, and will be input in control device 900 from the output of video camera 660 via image data processing system 662.According to the float state sensing apparatus 650 of this modified example, not only can detect the float state of uppermost sheet material P1, but also can detect the float state of other sheet materials in sheet stack.
As previously described, the sheet feeding device that the present invention can be applied to image processing systems such as manifolder, facsimile equipment, duplicating machine and use in this class image processing system etc.
In the situation that not departing from spirit of the present invention or feature, the present invention can implement with other concrete forms.Only for explanation, unrestriced object is considered all aspects of described exemplary embodiment.Therefore, scope of the present invention by claims but not above stated specification limit.To be included within the scope of the present invention with all modification in meaning and the scope of claim equivalence.

Claims (16)

1. a sheet feeding device, comprising:
Air-flow generating portion, it produces the air-flow for floating sheet material;
Send parts, it sends sheet material by rotating be positioned at uppermost sheet material imposed load in the sheet material to stacking in;
Delivery status sensing cell, its for sensing by the described delivery status of sending the sheet material that parts send; And
Load control unit, its sensing result based on described delivery status sensing cell regulates by the described parts of sending and is applied to the load on sheet material;
It is characterized in that, described delivery status sensing cell is positioned on the position that does not hinder the air-flow being produced by described air-flow generating portion, and
Described delivery status sensing cell with described in send parts movement be shifted in linkage, when described load control unit regulates the movement of sending parts described in occurring when sending parts and being applied to the load on sheet material by described.
2. sheet feeding device according to claim 1, wherein,
Described delivery status sensing cell comprises:
Rotatable parts, it is arranged on the top, region of stacking sheet material, and contacts with the sheet material being just transmitted and rotate with described sheet material; And
Sheet material traverse measurement part, its rotation amount based on described rotatable parts is measured the movement of sheet material.
3. sheet feeding device according to claim 2, also comprises:
Rotation amount sensing part, sends the rotation amount of parts described in its sensing; And
Calculating section, the slip that the sensing result of its sensing result based on described rotation amount sensing part and described delivery status sensing cell is calculated sheet material.
4. according to the sheet feeding device described in any one in claims 1 to 3, wherein,
Described air-flow generating portion at least produces along the air-flow of the direction of intersecting with sheet material transport direction.
5. according to the sheet feeding device described in any one in claims 1 to 3, wherein,
Described air-flow generating portion at least produces along the air-flow of the direction contrary with sheet material transport direction.
6. according to the sheet feeding device described in any one in claims 1 to 3, wherein,
Described delivery status sensing cell is positioned at described in the air-flow quilt of described air-flow generating portion generation sends the region that parts stop.
7. according to the sheet feeding device described in any one in claims 1 to 3, also comprise:
Load applying part, it is positioned at uppermost sheet material imposed load at the upstream position along sheet material transport direction in to stacking sheet material, and wherein said delivery status sensing cell is connected with described load applying part.
8. according to the sheet feeding device described in any one in claims 1 to 3, also comprise:
Gas flow-regulating unit, its sensing result based on described delivery status sensing cell regulates the air-flow being produced by described air-flow generating portion.
9. according to the sheet feeding device described in any one in claims 1 to 3, wherein,
Described delivery status sensing cell by with contact and be shifted for the support component of sending parts described in supporting.
10. according to the sheet feeding device described in any one in claims 1 to 3, wherein,
Described delivery status sensing cell is the sensing information relevant with the movement of sheet material in the situation that of contact sheet not.
11. sheet feeding devices according to claim 1, wherein,
Described delivery status sensing cell comprises:
Rotatable parts, it contacts with the sheet material being just transmitted and rotates with described sheet material;
Sheet material traverse measurement part, its rotation amount based on described rotatable parts is measured the movement of sheet material; And
Surface of contact traverse measurement part, it sends the movement of the surface of contact contacting with sheet material in parts described in measuring, and
Described sheet feeding device also comprises control module, and the difference between the movement of the movement of the surface of contact of described control module based on being measured by described surface of contact traverse measurement part and the sheet material by described sheet material traverse measurement part measurement is controlled by pressing unit and sent the pressing force on parts described in being applied to.
12. sheet feeding devices according to claim 11, wherein,
Described rotatable parts are followed the sheet material floating from the air-flow of tripping device supply and are vertically shifted.
13. sheet feeding devices according to claim 12, also comprise:
Tilting member, it rotatably supports described rotatable parts and is supported on swingably on back shaft, and the turning axle of wherein said rotatable parts is positioned at the upstream of described back shaft along sheet material direction of transfer.
14. 1 kinds of image processing systems, comprising:
Image forming portion, it forms image on sheet material; And
Sheet feeding device, feeding sheet materials is arrived described image forming portion by it;
Described sheet feeding device comprises:
Air-flow generating portion, it produces the air-flow for floating sheet material;
Send parts, it sends sheet material by rotating be positioned at uppermost sheet material imposed load in the sheet material to stacking in;
Delivery status sensing cell, its for sensing by the described delivery status of sending the sheet material that parts send; And
Load control unit, its sensing result based on described delivery status sensing cell regulates by the described parts of sending and is applied to the load on sheet material;
It is characterized in that, described delivery status sensing cell is positioned on the position that does not hinder the air-flow being produced by described air-flow generating portion, and
Described delivery status sensing cell with described in send parts movement be shifted in linkage, when described load control unit regulates the movement of sending parts described in occurring when sending parts and being applied to the load on sheet material by described.
15. image processing systems according to claim 14, also comprise:
Apparatus main body, it holds described image forming portion;
Wherein said air-flow generating portion is removably mounted in described apparatus main body.
16. image processing systems according to claim 15, wherein,
Described delivery status sensing cell comprises:
Rotatable parts, it is arranged on the top, region of stacking sheet material, and contacts with the sheet material being just transmitted and rotate with described sheet material; And
Sheet material traverse measurement part, its rotation amount based on described rotatable parts is measured the movement of sheet material.
CN200810176422.9A 2008-03-21 2008-11-11 Sheet feed device and image forming apparatus Expired - Fee Related CN101539733B (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2008073040 2008-03-21
JP2008073394A JP4507017B2 (en) 2008-03-21 2008-03-21 Sheet material supply apparatus and image forming apparatus
JP2008-073040 2008-03-21
JP2008-073394 2008-03-21
JP2008073040A JP2009227374A (en) 2008-03-21 2008-03-21 Paper feeder and image forming device
JP2008073394 2008-03-21

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CN101539733B true CN101539733B (en) 2014-06-11

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Publication number Priority date Publication date Assignee Title
JP6897016B2 (en) * 2015-12-16 2021-06-30 株式会社リコー Sheet transport / loading equipment and sheet inspection / sorting equipment
JP6818430B2 (en) * 2016-05-09 2021-01-20 キヤノン株式会社 Image forming device
US11542112B2 (en) * 2019-11-29 2023-01-03 Ricoh Company, Ltd. Sheet feeding device and image forming apparatus incorporating same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特開2007-308295A 2007.11.29
JP特開平7-315595A 1995.12.05

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