CN102030207A - Sheet conveying device, image forming apparatus, and method of detecting double-feed of sheet - Google Patents
Sheet conveying device, image forming apparatus, and method of detecting double-feed of sheet Download PDFInfo
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- CN102030207A CN102030207A CN2010102930670A CN201010293067A CN102030207A CN 102030207 A CN102030207 A CN 102030207A CN 2010102930670 A CN2010102930670 A CN 2010102930670A CN 201010293067 A CN201010293067 A CN 201010293067A CN 102030207 A CN102030207 A CN 102030207A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/004—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
- B65H9/006—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet the stop being formed by forwarding means in stand-by
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
- B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
- H04N1/00588—Conveying sheets before or after scanning to the scanning position
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
- H04N1/00599—Using specific components
- H04N1/00602—Feed rollers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/00628—Separating, e.g. preventing feeding of two sheets at a time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32609—Fault detection or counter-measures, e.g. original mis-positioned, shortage of paper
- H04N1/32625—Fault detection
- H04N1/3263—Fault detection of reading apparatus or transmitter, e.g. original jam
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32609—Fault detection or counter-measures, e.g. original mis-positioned, shortage of paper
- H04N1/32646—Counter-measures
- H04N1/32651—Indicating or reporting
- H04N1/32657—Indicating or reporting locally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/30—Numbers, e.g. of windings or rotations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/52—Defective operating conditions
- B65H2511/524—Multiple articles, e.g. double feed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/50—Timing
- B65H2513/51—Sequence of process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/50—Timing
- B65H2513/512—Starting; Stopping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/30—Sensing or detecting means using acoustic or ultrasonic elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/06—Office-type machines, e.g. photocopiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
- H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
- H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
- H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/0077—Types of the still picture apparatus
- H04N2201/0081—Image reader
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Controlling Sheets Or Webs (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
The invention provides a sheet conveying device, an image forming apparatus, and a method for detecting double-feed of the sheet which can detect the double-feed when the original document is not bent and improve the double-feed detection accurac. The sheet conveying device includes: a first roller configured to correct a tilt of a sheet to be conveyed; a first detecting unit located further on an upstream side in a conveying direction of the sheet than the first roller and configured to detect information concerning double-feed of the sheet; a second roller configured to convey the sheet to the first roller; a driving unit configured to drive the second roller; and a controller configured to control the driving unit to thereby temporarily stop the conveyance of the sheet in order to perform the detection by the first detecting unit in a state in which an end of the sheet on a downstream side in the conveying direction of the sheet is located further on the upstream side in the conveying direction of the sheet than a nip position of the first roller.
Description
The cross reference of related application
The application requires the preceence of No. the 61/248910th, the U.S. Provisional Patent Application submitted on October 6th, 2009, and its full content is hereby expressly incorporated by reference.
Technical field
The present invention relates to a kind of technology that detects the overlapping conveying of thin slice.
Background technology
The overlapping conveying that prior art detects the original copy of being carried in the auto document feeder all after making original copy and being used to proofread and correct the accurate position of original copy bevelled roller butt original copy be under the case of bending and carry out.
Yet,, can't stably carry out the detection of overlapping conveying because detect the position relation instability of the sensor and the original copy of overlapping conveying.
Summary of the invention
In view of the above problems, thus the invention provides and can not have to detect under the crooked state the overlapping conveying method of inspection of sheet-conveying device, image processing system and thin slice that overlapping conveying improves the precision that overlapping conveying detects at original copy.
Sheet-conveying device of the present invention comprises: first roller that the inclination of conveying thin slice is proofreaied and correct; First test section, above-mentioned first test section are positioned at than the more close thin slice throughput direction of above-mentioned first roller upstream side, are used to detect the information of the overlapping conveying of relevant thin slice; Carry second roller of thin slice to above-mentioned first roller; Drive the drive division of above-mentioned second roller; And controller, by controlling above-mentioned drive division, under the end of the conveyance direction downstream side of thin slice is positioned at state than the more close thin slice throughput direction of the clip position of above-mentioned first roller upstream side, thin slice is carried temporarily stopped, so that detect by above-mentioned first test section.
Image processing system of the present invention comprises: the original copy delivery section, and above-mentioned original copy delivery section comprises: first roller that the inclination of the original copy carried is proofreaied and correct; First test section, above-mentioned first test section are positioned at than the more close original copy throughput direction of above-mentioned first roller upstream side, are used to detect the information of the overlapping conveying of relevant original copy; Carry second roller of original copy to above-mentioned first roller; And the drive division that drives above-mentioned second roller; The original copy that above-mentioned original copy delivery section is carried carries out optically read reading part; The view data that reads according to above-mentioned reading part forms the image forming part of image on thin slice; And controller, by controlling above-mentioned drive division, under the end of the conveyance direction downstream side of original copy is positioned at state than the more close original copy throughput direction of the clip position of above-mentioned first roller upstream side, original copy is carried temporarily stopped, so that detect by above-mentioned first test section.
The overlapping conveying method of inspection of thin slice of the present invention is characterised in that, under the end of the conveyance direction downstream side of thin slice is positioned at state than the more close thin slice throughput direction of the clip position upstream side that is used to proofread and correct thin slice bevelled roller, detects the overlapping conveying of thin slice.
Description of drawings
Fig. 1 is the section drawing of image processing system;
Fig. 2 is the section drawing of auto document feeder;
Fig. 3 is a block diagram of carrying relevant parts with the original copy of auto document feeder;
Fig. 4 is the diagram of circuit that the action of auto document feeder is shown;
Fig. 5 be be positioned at overlapping conveying detection position the original copy model utility the section drawing of the auto document feeder that illustrates; And
Fig. 6 be when motor driving part is stopped the original copy mode position the section drawing of the auto document feeder that illustrates.
The specific embodiment
Fig. 1 is the section drawing of image processing system.Image processing system 1 can be MFP (multi-function printer).
With reference to Fig. 1, image processing system 1 comprises image reading unit R and image forming part P.Image reading unit R scanning is also read thin slice original copy and books original copy.
The printed data that image that image forming part P reads from original copy according to image reading unit R or external device send to image processing system 1 forms the developer image on thin slice.
Image reading unit R comprises the auto document feeder 9 (ADF (auto document feeder)) of original copy automatic transport to the image reading position of appointment.The image of the original copy of placing on the original copy pallet of these auto document feeder 9 automatic transport (the original copy mounting table of appointment) original copy of the last placement of Rt and the not shown document board is scanned optical system 10 and reads.
And image forming part P comprises toner cartridge 1Y～1K, photosensitive material 2Y～2K, developer roll 3Y～3K, mixer 4Y～4K, intermediate transfer belt 6, fixing device 7 and discharges pallet 8.
The image processing system 1 of present embodiment comprises controller 801, memory device 803, operation display part 805 and Department of Communication Force 807.
Show various settings on the operation display part 805.Operation display part 805 can be LCD (Liquid Crystal Display (LCD)), EL (electroluminescent display), PDP (plasma display) and CRT (cathode-ray tube display)
Can change various settings by operation display part 805 is operated.Operation display part 805 can be a touch-screen type.
Below, an example of handling in the image processing apparatus as present embodiment describes duplicating the summary of handling.
At first, the thin slice that picks up from box enters the thin slice transport path.A plurality of rollers are to moving the thin slice that enters in the thin slice transport path to the throughput direction of appointment.
Then, just being scanned optical system 10 in the image reading position of appointment by the image of the multiple sheet original copy of auto document feeder 9 continuous automatic transport reads.
Then, the print data of the image that reads from original copy according to image reading unit R forms electrostatic latent image on being used for the photosensitive surface of photosensitive material 2Y, 2M, 2C and the 2K of the developer image of yellow (Y), a magenta (M), cyan (C) and black (K) to the thin slice.
Again next, utilize on the photosensitive material 2Y～2K of developer roll 3Y～3K attached to above-mentioned formation electrostatic latent image with the developer after mixer 4Y～4K stirring of developer.So, the electrostatic latent image that forms on the photosensitive surface of photosensitive material has just developed.
Be formed on the developer image (so-called primary transfer) to the belt surface of intermediate transfer belt 6 on the photosensitive material like this, the developer image of carrying by the rotation of intermediate transfer belt 6 is transferred on the thin slice of being carried on the T of the secondary transfer printing position of appointment.
To be transferred to developer image heat fixer on the thin slice on thin slice with fuser 7.Heat fixer has the thin slice of developer image to carry along transport path by a plurality of conveying rollers, and drains into discharge pallet 8 successively.
Below, describe with regard to auto document feeder 9.Fig. 2 is the amplification sectional view of auto document feeder.Original copy is placed on the original copy pallet 11.Original copy can be many or individual.
Pick up as the pick-up roller 12 of the 3rd roller and to be placed on the original copy on the original copy pallet 11 and to flow to feed roll 13 as second roller.Feed roll 13 is carried the original copy that pick-up roller 12 picks up to conveyance direction downstream side.
The rotary shaft of pick-up roller 12 and feed roll 13 is connected to each other by transmission device 18.Transmission device 18 can be load-transfer device or pulley.
Fig. 3 is the block diagram that the original copy of auto document feeder 9 is carried related parts.With reference to this figure, pick-up roller 12 is up-and-down movement by the action of solenoid-activated portion 40.Solenoid-activated portion 40 comprises solenoid driver 41 and picks up screw actuator 42.
With reference to Fig. 2, be positioned at the position relative with feed roll 13 as the separate roller 14 of the 4th roller.If the original copy that pick-up roller 12 picks up is more than two, because of the friction force effect between original copy, the load of the torque limiter of separate roller 14 increases, and separate roller 14 stops action.The separate roller 14 that stops and the thin slice butt of downside, the thin slice downstream transport of inhibition downside.
The original copy butt of carrying as the accurate position roller 15 of first roller and feed roll 13 is to proofread and correct the inclination of original copy.That is, accurate position roller 15 is made of two rollers that contact with each other, and makes original copy and the holding part butt that is formed by two roller butts and crooked, proofreaies and correct the inclination of original copy with this.
With reference to Fig. 3, motor driving part 30 drives pick-up roller 12, feed roll 13 and accurate position roller 15.Motor driving part 30 comprises motor driver 31 and original copy paper feeding motor 32.
Original copy paper feeding motor 32 can be a stepping motor.801 pairs of motor driver 31 output pulse signals of controller.Motor driver 31 is supplied drive currents according to the impulse singla that receives to original copy paper feeding motor 32.
Being rotated in the forward of original copy paper feeding motor 32 drives pick-up roller 12 and feed roll 13 rotations.The retrograde rotation of original copy paper feeding motor 32 drives accurate position roller 15 and rotates.
Overlapping conveying test section 17 is between accurate position roller 15 and accurate level sensor 16.Overlapping conveying test section 17 can be a non-contact sensor.Non-contact sensor can be a ultrasonic transduter.
When overlapping conveying test section 17 was ultrasonic transduter, overlapping conveying test section 17 comprised super sonic generating unit 17a and super sonic acceptance division 17b.Super sonic generating unit 17a is relative across the transport path of original copy with super sonic acceptance division 17b.Super sonic generating unit 17a is positioned at the position than the more close original copy conveyance direction downstream side of super sonic acceptance division 17b.Super sonic generating unit 17a and super sonic acceptance division 17b can be oblique relative with respect to the transport path of original copy.Oblique relative by super sonic generating unit 17a with super sonic acceptance division 17b, can improve accuracy of detection.
The super sonic of super sonic generating unit 17a output is received by super sonic acceptance division 17b.The super sonic that enters in the original copy is decayed gradually.If the amplitude that the number increase of original copy then decays increases.Super sonic acceptance division 17b exports cooresponding signal according to the ultrasonic intensity that receives to controller 801.
If it is overlapping to enter the original copy of detection position of overlapping conveying test section 17, the weak strength when then the ultrasonic intensity that receives of super sonic acceptance division 17b promptly detects an original copy than common situation.Whether controller 801 is discerned original copy according to the intensity of the signal of super sonic acceptance division 17b output overlapping conveying.
The driving timing of the accurate position of controller 801 control rollers 15, thus the original copy crooked carried in the mode that is involutory with the toner image that is formed on the transfer belt 11 with accurate position roller 15 butts.
Action with regard to auto document feeder 9 describes with reference to the flow process of Fig. 4.In Act101, controller 801 makes pick-up roller 12 move down towards being used to pick up the take-off location that is positioned over the original copy on the original copy pallet 11 by control solenoid drive division 40.
In Act102, controller 801 drives pick-up roller 12 and feed roll 13 by control motor driving part 30.The original copy that is picked up by pick-up roller 12 moves downstream.In Act103, controller 801 judges whether accurate level sensor 16 has detected original copy.
If accurate level sensor 16 has detected original copy, then enter Act104.In Act104, controller 801 begins to count the pulse count to motor driver 31 outputs.
In Act105, controller 801 judges whether the pulse count of counting has reached N1.If pulse count has reached N1, then enter Act106.
When controller 801 stopped motor driving part 30, the end of the conveyance direction downstream side of original copy was set the position that is positioned at than the more close throughput direction upstream side of holding part of accurate position roller 15 for.Fig. 5 be be positioned at overlapping conveying detection position the original copy model utility the section drawing of the auto document delivery section that illustrates.With reference to this figure, original copy with accurate position roller 15 butts before stop, being in nothing agley along the state of transport path.
When utilizing pick-up roller 12 and feed roll 13 to carry original copy,, stop also not influence for the control original copy even skid.That is to say, owing to utilize the testing result of the accurate level sensor 16 between feed roll 13 and accurate position roller 15 to control stopping of original copy, thus suppress the instability of overlapping conveying detection position.
In Act107, controller 801 judges according to the output signal of super sonic acceptance division 17b whether original copy overlapping conveying occurs.Because original copy is not positioned on the transport path along transport path agley straightly, so the precision that overlapping conveying detects improves.
If overlapping conveying appears in original copy, then in Act108, controller 801 is reported to operation display part 805 demonstrations and overlapping conveying occurred.If overlapping conveying does not appear in original copy, then enter Act109.
In Act109, controller 801 is drive motor drive division 30 once more, and feed roll is rotated.In Act110, controller 801 begins to count the pulse count to motor driver 31 outputs.
In Act111, controller 801 judges whether the pulse count that counts out has reached N2.If pulse count has reached N2, then enter Act112, controller 801 stops the driving to motor driving part 30.
Fig. 6 be when motor driving part 30 is stopped the original copy mode position the section drawing of the auto document feeder 9 that illustrates.With reference to this figure, owing to cause original copy conveying downstream to be obstructed with accurate position roller 15 butts, and then the original copy bending.
In Act113, controller 801 judges whether to arrive scanning regularly.So-called scanning regularly is meant that original copy was positioned at the timing of reading the position when scanning optics 10 began to scan.
In Act114, controller 801 makes original copy paper feeding motor 32 backwards rotation by control motor driving part 30, and then accurate position roller 15 is rotated.Original copy is moved to image reading position by roller 15 clampings of accurate position.Fig. 6 has omitted original copy and has moved to the conveying of reading the position from accurate position roller 15.
(variation 1)
As the method that original copy is stopped in overlapping conveying detection position, after accurate level sensor 16 detections, controller 801 countings also can be counted the driving time of feed roll 13 to the pulse count of motor driver 31 outputs.That is to say that measure feed roll 13 and carry out the rotational action time, when the time of measuring reached the fixed time, controller 801 can make motor driving part 30 stop.This fixed time calculates according to the velocity of rotation of feed roll 13.In advance this fixed time of calculating is stored to memory device 803, controller 801 can be read the information of relevant fixed time from memory device 803 and carry out above-mentioned control.
(variation 2)
Overlapping conveying test section 17 also can be other non-contact sensors.Other non-contact sensors can be optical sensors.Optical sensor comprises luminous element and photo detector.These luminous elements and photo detector are positioned at the position of clamping original copy.Controller 801 has been discerned the zero lap conveying from the light quantity of the light that photo detector receives.
(variation 3)
Original copy paper feeding motor 32 can be the DC motor.Be equipped with light teasel root device on the output shaft of DC motor.Controller 801 is controlled the drive amount of DC motor by the number of times of light light teasel root device interruption light.
(variation 4)
Above-mentioned embodiment, though be the explanation of carrying out towards the auto document feeder 9 that reads position conveying original copy,, also be applicable to thin slice delivery system by boxlike pallet or manual feed pallet paper supply.That is to say, also can make the conveying of thin slice temporarily stop to carry out overlapping conveying detection than position by the included more close throughput direction upstream side of accurate position roller of the thin slice delivery system of boxlike pallet or manual feed pallet paper supply.
Though be illustrated with regard to certain embodiment, these embodiments are just given an example, and are not used in to limit the scope of the invention.In fact new method and system described herein can embody with other variety of ways, and in addition, the various omissions of method and system described herein, replacement and change all belong in the scope of aim of the present invention.Claims and equivalent thereof are intended to contain all any way and modifications of conforming to aim with the scope of the invention.
Claims (20)
1. sheet-conveying device comprises:
First roller that the inclination of conveying thin slice is proofreaied and correct;
First test section, described first test section are positioned at than the more close thin slice throughput direction of described first roller upstream side, are used to detect the information of the overlapping conveying of relevant thin slice;
Carry second roller of thin slice to described first roller;
Drive the drive division of described second roller; And
Controller, by controlling described drive division, under the end of the conveyance direction downstream side of thin slice is positioned at state than the more close thin slice throughput direction of the clip position of described first roller upstream side, thin slice is carried temporarily stopped, so that detect by described first test section.
2. sheet-conveying device according to claim 1, wherein,
Comprise between described second roller and described first test section and be used to detect second test section that thin slice enters,
If described second test section detects thin slice and enters, then described controller begins control, makes thin slice be parked in the detection position of described first test section.
3. sheet-conveying device according to claim 2, wherein,
Described drive division comprises the actuator of pulse motor and described pulse motor,
If described second test section detects thin slice and enters, then described controller begins to count the pulse count to described actuator output, and according to this count results, thin slice is stopped on the detection position of described first test section.
4. sheet-conveying device according to claim 1, wherein,
Described first test section is the test section of non-contact type.
5. sheet-conveying device according to claim 4, wherein,
Described first test section comprises:
Produce hypracoustic super sonic generating unit; And
Receive the hypracoustic super sonic acceptance division that described super sonic generating unit produces,
Described super sonic generating unit and described super sonic acceptance division are relative across the thin slice transport path.
6. sheet-conveying device according to claim 5, wherein,
Described super sonic happening part is in the position than the more close thin slice throughput direction of described super sonic acceptance division downstream.
7. sheet-conveying device according to claim 2, wherein,
Described second test section is positioned at thin slice transport path below.
8. sheet-conveying device according to claim 1, wherein,
Comprise the 3rd roller that picks up thin slice to described second roller,
Described second roller and described the 3rd roller connect by transmission device.
9. sheet-conveying device according to claim 8, wherein,
Described second roller is relative with the 4th roller, the overlapping conveying of the thin slice that described the 4th roller is used to forbid that described the 3rd roller picks up.
10. image processing system comprises:
The original copy delivery section, described original copy delivery section comprises:
First roller that the inclination of the original copy carried is proofreaied and correct;
First test section, described first test section are positioned at than the more close original copy throughput direction of described first roller upstream side, are used to detect the information of the overlapping conveying of relevant original copy;
Carry second roller of original copy to described first roller; And
Drive the drive division of described second roller;
The original copy that described original copy delivery section is carried carries out optically read reading part;
The view data that reads according to described reading part forms the image forming part of image on thin slice; And
Controller, by controlling described drive division, under the end of the conveyance direction downstream side of original copy is positioned at state than the more close original copy throughput direction of the clip position of described first roller upstream side, original copy is carried temporarily stopped, so that detect by described first test section.
11. image processing system according to claim 10, wherein,
Described original copy delivery section comprises between described second roller and described first test section and is used to detect second test section that original copy enters,
If described second test section detects original copy and enters, then described controller begins control, makes original copy be parked in the detection position of described first test section.
12. image processing system according to claim 11, wherein,
Described drive division comprises the actuator of pulse motor and described pulse motor,
If described second test section detects original copy and enters, then described controller begins to count the pulse count to described actuator output, and according to this count results, original copy is stopped on the detection position of described first test section.
13. image processing system according to claim 10, wherein,
Described first test section is the test section of non-contact type.
14. image processing system according to claim 13, wherein,
Described first test section comprises: produce hypracoustic super sonic generating unit; And the hypracoustic super sonic acceptance division that receives described super sonic generating unit generation,
Described super sonic generating unit and described super sonic acceptance division are relative across the original copy transport path.
15. image processing system according to claim 14, wherein,
Described super sonic happening part is in the position than the more close original copy throughput direction of described super sonic acceptance division downstream.
16. image processing system according to claim 11, wherein,
Described second test section is below the original copy transport path.
17. image processing system according to claim 10, wherein,
Described original copy delivery section comprises the 3rd roller that picks up original copy to described second roller,
Described second roller and described the 3rd roller connect by transmission device.
18. image processing system according to claim 17, wherein,
Described second roller is relative with the 4th roller, the overlapping conveying of the original copy that described the 4th roller is used to forbid that described the 3rd roller picks up.
19. the overlapping conveying method of inspection of a thin slice, wherein,
Under the end of the conveyance direction downstream side of thin slice is positioned at state than the more close thin slice throughput direction of the clip position upstream side that is used to proofread and correct thin slice bevelled roller, detect the overlapping conveying of thin slice.
20. the overlapping conveying method of inspection of thin slice according to claim 19, wherein,
Described overlapping conveying detects uses non-contact sensor to carry out.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US24891009P | 2009-10-06 | 2009-10-06 | |
| US61/248,910 | 2009-10-06 |
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| CN102030207A true CN102030207A (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102930670A Pending CN102030207A (en) | 2009-10-06 | 2010-09-20 | Sheet conveying device, image forming apparatus, and method of detecting double-feed of sheet |
Country Status (2)
| Country | Link |
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| US (1) | US20110084443A1 (en) |
| CN (1) | CN102030207A (en) |
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Application publication date: 20110427 |