CN102120533B - Automatic paper feeding device - Google Patents
Automatic paper feeding device Download PDFInfo
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- CN102120533B CN102120533B CN 201010003513 CN201010003513A CN102120533B CN 102120533 B CN102120533 B CN 102120533B CN 201010003513 CN201010003513 CN 201010003513 CN 201010003513 A CN201010003513 A CN 201010003513A CN 102120533 B CN102120533 B CN 102120533B
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Abstract
The invention relates to an automatic paper feeding device which comprises a paper feeding tray, a paper feeding channel, a paper taking module, a frictional wheel, a thickness detection module and a control unit. The paper taking module is driven to feed a file on the paper feeding tray into the paper feeding channel; the thickness detection module is used for detecting the thickness of the file entering the paper feeding channel; and the control unit is used for judging whether multiple paper feeding happens. When the multiple paper feeding happens, the paper taking module reversely rotates to feed the file to the paper feeding tray. The frictional wheel provides a smaller frictional force when the paper taking module reversely rotates so that the file is returned to the paper feeding tray.
Description
Technical field
The present invention relates to a kind of automatic paper feeder, especially have the automatic paper feeder that moves back the paper function.
Background technology
Early stage scanner unit only can scan the image of individual file; When file is folded in user's desire scanning one; Must be after scanner unit have scanned a file, take out the file that scanning accomplishes and place next file on scanner unit to carry out the scanning of next file.In view of manual alternate file too bothers, therefore develop automatic paper feeder on the market, cooperate the scanner unit use then not need manual alternate file just can accomplish the scanning of a folded file, the duplex scanning of file even.
Generally speaking; Automatic paper feeder is provided with a paper taking module; In order to a folded file is presented by the feeding box of placing file and moved to get in the automatic paper feeder toward a paper feed direction, in the file feed process, only there is one in order to ensure present the file that gets in the automatic paper feeder at every turn; Except a comber is set in paper taking module; Also a friction pad or a friction wheel need be set below comber,, and make the file that contacts with paper taking module and the friction force between paper taking module greater than the friction force between file so that friction force is provided to the file that contacts with friction pad; And file that contacts with friction pad/friction wheel and the friction force between friction pad/friction wheel are also greater than the friction force between file, to guarantee that only presenting a file gets in the automatic paper feeder at every turn.
Generally speaking; The problem that automatic paper feeder the most often takes place is overlapping paper feed (Multiple Feeding); When overlapping paper feed took place, whether the user can't discover whole part of file by scanned, and caused the omission of scanning document; Then cause the damage of file what is more, cause the damage of automatic paper feeder even because of overlapping paper feed.
In addition, when paperboard (Jamming) takes place because of overlapping paper feed in automatic paper feeder, owing to be provided with friction pad/friction wheel; Therefore, when user's desire is pullled out by automatic paper feeder with jammed file,, file has friction force owing to contacting with friction pad/friction wheel; Therefore the user can't be directly with file toward moving back in contrast to one of paper feed direction that the paper direction moves and with it by pulling out in the automatic paper feeder; And must open the loam cake of automatic paper feeder, make paper taking module leave the file top, and file does not also contact and does not have a friction force with friction pad/friction wheel; At this moment, file just can be removed.Therefore inconvenience in view of automatic paper feeder commonly used causes, need a kind of automatic paper feeder that detects overlapping paper feed and can move back paper.
Summary of the invention
The object of the invention provide a kind of can when overlapping paper feed takes place, move back paper automatically and moving back paper accomplish after the automatic paper feeder of paper feed once more.
In a preferred embodiment, the present invention provides a kind of automatic paper feeder, and in order to present a plurality of files, this automatic paper feeder comprises:
One feeding box, in order to place these a plurality of files, wherein these a plurality of files comprise one first file and one second file;
One paper-feeding channel;
One paper taking module is in order to get into this paper-feeding channel with these a plurality of file feeds on this feeding box;
One friction wheel is arranged at the below of this paper taking module, produces one first friction force and one second friction force in order to contact with this second file; Wherein this second friction force is less than this first friction force;
One thickness detection module is arranged on this paper-feeding channel, exports a thickness signal in order to the thickness that detects these a plurality of files; And
One control unit is connected in this thickness detection module and this paper taking module, in order to control the rotation direction of this paper taking module according to this thickness signal; Wherein when the thickness of these a plurality of files is less than or equal to a thickness default value; This this paper taking module of control unit control continues to rotate toward one first hand of rotation, and the file friction force between this first file and this second file is presented this this paper-feeding channel of first file entering less than this first friction force; And when the thickness of these a plurality of files during greater than this thickness default value; This this paper taking module of control unit control rotates toward one second hand of rotation; And this second friction force makes these a plurality of files be fed to this less than this document friction force and gets paper box, and this control unit also rotates to present this a plurality of files toward this first hand of rotation at this paper taking module this paper taking module of control after the delay time that this second hand of rotation rotates and to get into these paper-feeding channels.
In a preferred embodiment, this friction wheel also comprises:
One friction wheel inwall;
One coil spring has one first spring portion and one second spring portion, and this first spring portion contacts with this friction wheel inwall, and the internal diameter of this first spring portion is greater than the internal diameter of this second spring portion; And
One wheel shaft passes this coil spring with fixing this coil spring.
In a preferred embodiment; When these a plurality of files are fed to this paper-feeding channel by this feeding box; This friction wheel rotates toward this second hand of rotation; This first spring portion is reversed toward this second hand of rotation and is expanded, and gap between this first spring portion and this friction wheel inwall is reduced and be fixed, and this second spring portion is reversed with respect to this wheel shaft and produces one first damping moment of torsion corresponding to this first friction force; When these a plurality of files are fed to this feeding box by this paper-feeding channel; This friction wheel rotates toward this first hand of rotation; This second spring portion is fixed on this wheel shaft, and is increased gap between this first spring portion and this friction wheel inwall along with the rotation of this friction wheel with the one second damping moment of torsion of generation corresponding to this second friction force by this first spring portion of being expanded; Wherein this first damping moment of torsion is greater than this second damping moment of torsion.
In a preferred embodiment, this friction wheel comprises:
One first sleeve has pipe in the sleeve;
One second sleeve is arranged in this first sleeve, and this second sleeve has a sleeve outer tube, is positioned at an end of this second sleeve, in order to this sleeve in the end in contact of managing;
One coil spring; Be arranged in this first sleeve; This helical spring end is sheathed on this sleeve outer tube and forms one first spring portion; This helical spring other end is sheathed in this sleeve pipe and goes up and form one second spring portion, and this first spring portion has one first spring inside diameter, and this second spring portion has one second spring inside diameter less than this first spring inside diameter;
One free-wheel clutch is arranged in this second sleeve, carries out the rotation of one first hand of rotation in order to stop this second sleeve; And
One wheel shaft passes this first sleeve, this second sleeve and this free-wheel clutch.
In a preferred embodiment; When these a plurality of files are fed to this paper-feeding channel by this feeding box; This first sleeve rotates toward this first hand of rotation; This second sleeve is limited by this free-wheel clutch and can't rotates, and this first spring portion is fixed on this sleeve outer tube, and the second spring portion is reversed with respect to pipe in this sleeve and produces one first damping moment of torsion; When this second file is fed to this feeding box by this paper-feeding channel; This first sleeve rotates toward this second hand of rotation; This first spring portion is fixed on this sleeve outer tube; And this second spring portion makes this second sleeve rotate along with the rotation of this first sleeve on being fixed in and managing in this sleeve, and this free-wheel clutch produces this second damping moment of torsion with respect to this wheel shaft rotation; Wherein this first damping moment of torsion is greater than this second damping moment of torsion.
In a preferred embodiment, the caliber of pipe makes the magnitude of interference between this first spring portion and this sleeve outer tube greater than the magnitude of interference between managing in this second spring portion and this sleeve less than the caliber of this sleeve outer tube in this sleeve.
Whether in a preferred embodiment, automatic paper feeder of the present invention also comprises a file sensor, is arranged at a side of this thickness detection module, and is connected in this control unit, pass through in order to detect these a plurality of files.
In a preferred embodiment; This document sensor is between this paper taking module and this thickness detection module; When detecting these a plurality of files and pass through; This document sensor is given this control unit through output one paper feed signal after this delay time, this this paper taking module of control unit control is rotated to present these a plurality of files toward this first hand of rotation get into this paper-feeding channel.
In a preferred embodiment, this document sensor is a swing arm touch sensor.
In a preferred embodiment, this paper taking module comprises a pickup roller and a comber, and this pickup roller rotates along with the rotation of this comber synchronously, and this pickup roller is identical with the hand of rotation of this comber.
In a preferred embodiment, when this paper taking module rotated toward this second hand of rotation, this paper taking module was swung and this pickup roller is not contacted with these a plurality of files.
In a preferred embodiment, rotate for this comber the time of a specific number of turns this delay time.
In a preferred embodiment, this thickness detection module also comprises:
One detection arm is positioned on this paper-feeding channel, in order to when these a plurality of files through the time replace this detection arm and be moved; And
One optical displacement sensitive member is arranged at a side of this detection arm, obtains the thickness of these a plurality of files in order to the displacement of measuring this detection arm.
In a preferred embodiment, automatic paper feeder of the present invention also comprises:
One paper feed roller is arranged on this paper-feeding channel, in order to present these a plurality of files to this paper-feeding channel;
One paper output box is arranged under this feeding box the side, these a plurality of files that are fed in order to placement; And
One paper delivery roller set is in order to present these a plurality of files to this paper output box.
Description of drawings
Fig. 1 is the lateral plan of the structure of automatic paper feeder of the present invention in a preferred embodiment.
Fig. 2 is the section-drawing of the structure of friction wheel in a preferred embodiment of automatic paper feeder of the present invention.
Fig. 3 is the paper taking module of automatic paper feeder of the present invention and friction wheel is got the structure of paper in a preferred embodiment schematic side view.
Fig. 4 is the paper taking module of automatic paper feeder of the present invention and friction wheel moves back the structure of paper in a preferred embodiment schematic side view.
Fig. 5 is the paper taking module of automatic paper feeder of the present invention and friction wheel moves back the structure of paper completion in a preferred embodiment schematic side view.
Fig. 6 is the paper taking module of automatic paper feeder of the present invention and friction wheel is got the structure of paper once more in a preferred embodiment schematic side view.
Fig. 7 is the time sequences figure of automatic paper feeder of the present invention in a preferred embodiment.
Fig. 8 is the section-drawing of the structure of friction wheel in another preferred embodiment of automatic paper feeder of the present invention.
Wherein, description of reference numerals is following:
1 automatic paper feeder, 10 feeding box
11 paper-feeding channels, 12 paper taking modules
13,23 friction wheels, 14 thickness detection modules
15 file sensors, 16 control units
17 paper feed rollers, 18 paper delivery roller set
19 paper output box, 121 pickup rollers
122 combers, 131 friction wheel inwalls
132,233 coil springs, 133,235 wheel shafts
141 detection arm, 142 optical displacement sensitive members
231,232 sleeves, 234 free-wheel clutchs
1321, a side of 13,221 second spring portions of 1322 spring portions
Pipe in opposite side 2311 sleeves of 13,222 second spring portions
2321 sleeve outer tube C1, C2 hand of rotation
D1 ', d2 ' caliber F1, F2, Fs friction force
R1, r2, r1 ', r2 ' spring inside diameter S, S1, S2 file
T1, t2, t3 time td delay time
The specific embodiment
See also Fig. 1, it is the lateral plan of the structure of automatic paper feeder of the present invention in a preferred embodiment.Automatic paper feeder 1 comprises a feeding box 10, a paper-feeding channel 11, a paper taking module 12, a friction wheel 13, a thickness detection module 14, a file sensor 15, a control unit 16 (seeing also Fig. 3), a paper feed roller 17, a paper delivery roller set 18 and a paper output box 19.Feeding box 10 is in order to place a plurality of file S, and wherein a plurality of file S comprise the first file S1 and the second file S2.Paper taking module 12 gets into paper-feeding channel 11 in order to a plurality of file S on the feeding box 10 are presented; Paper taking module 12 comprises a pickup roller 121 and a comber 122; Pickup roller 121 rotates along with the rotation of comber 122 synchronously; And pickup roller 121 is identical with the hand of rotation of comber 122, the wherein power driven that provided by a CD-ROM drive motor (not being shown among the figure) of paper taking module 12.Friction wheel 13 is arranged at the below of paper taking module 12; In order to produce one first damping torque T 1 (seeing also Fig. 3) and one second damping torque T 2 (seeing also Fig. 4) thus produce the corresponding first friction force F1 (seeing also Fig. 3) and the second friction force F2 (seeing also Fig. 4); Wherein the first damping torque T 1 is greater than the second damping torque T 2, and the first damping torque T 1 and the second damping torque T 2 is in the opposite direction.
Next the structure of friction wheel 13 is described, is seen also Fig. 2, it is the section of structure of friction wheel in a preferred embodiment of automatic paper feeder of the present invention.Friction wheel 13 comprises a friction wheel inwall 131, a coil spring 132 and a wheel shaft 133.Coil spring 132 has one first spring portion 1321 and one second spring portion 1322; The first spring portion 1321 contacts with friction wheel inwall 131; And a side 13221 of the second spring portion 1322 contacts with friction wheel inwall 131; And have the gap between the opposite side 13222 of the second spring portion 1322 and the friction wheel inwall 131 and do not contact, and the internal diameter r1 of the first spring portion 1321 is greater than the internal diameter r2 of the second spring portion 1322 with friction wheel inwall 131.Wheel shaft 133 passes coil spring 132 with fixing coil spring 132 on it.
Next the generation principle of damping moment of torsion is described, is please consulted Fig. 2 and Fig. 3 simultaneously, Fig. 3 is the paper taking module of automatic paper feeder of the present invention and friction wheel is got paper in a preferred embodiment structure schematic side view.When automatic paper feeder 1 desires to present a plurality of file S; Pickup roller 121 and comber 122 rotate toward one first hand of rotation C1; Friction wheel 13 then rotates toward one second hand of rotation C2; In this preferred embodiment, the first hand of rotation C1 is a clockwise direction, and the second hand of rotation C2 is an anticlockwise direction.When friction wheel 13 rotates toward the second hand of rotation C2; The first spring portion 1321 is reversed toward the second hand of rotation C2; Because the relation of the rotation direction of coil spring 132 is expanded the spring portion 1321 that wins, and the gap of 131 of the first spring portion 1321 and friction wheel inwalls reduces and is fixed; And the second spring portion 1322 is reversed with respect to wheel shaft 133 and is produced the first damping torque T 1 corresponding to the first friction force F1, and the first friction force F1 is directly proportional with the first damping torque T 1.
Please consult Fig. 2 and Fig. 4 simultaneously, Fig. 4 is the paper taking module of automatic paper feeder of the present invention and friction wheel moves back the structure of paper in a preferred embodiment schematic side view.When friction wheel 13 rotates toward the first hand of rotation C1; Because the relation of the rotation direction of coil spring 132; The second spring portion 1322 that makes is fixed (tight bundle) on wheel shaft 133; And the first spring portion 1321 that is expanded increases the gap of 131 of the first spring portion 1321 and friction wheel inwalls to produce the second damping torque T 2 corresponding to the second friction force F2 along with the rotation of friction wheel 13; And the first damping torque T 1 is greater than the second damping torque T 2, and the second friction force F2 also is directly proportional with the second damping torque T 2.When friction wheel 13 rotates toward the first hand of rotation C1; Owing to being replied and be original state along with the rotation of friction wheel 13 by the first spring portion 1321 that expanded; At this moment; Gap that the first spring portion 1321 and friction wheel inwall are 131 increases and reduces the magnitude of interference of the first spring portion 1321 and 131 of friction wheel inwalls, makes that the second damping torque T 2 of generation is quite little.
What need special version is; The size that the internal diameter r1 of the first spring portion 1321 and friction wheel inwall are 131 makes to win through accurate calculating and can produce the specific magnitude of interference between spring portion 1321 and the friction wheel inwall 131; And the size of the internal diameter r2 of the second spring portion 1322 and wheel shaft 133 is also calculated through accurate; Make the damping torque T 1 of winning greater than the second damping torque T 2, and the second damping torque T 2 is quite little.
Next the operation situation of automatic paper feeder 1 of the present invention is described, is please consulted Fig. 1, Fig. 3 and Fig. 7 simultaneously, Fig. 7 is the time sequences figure of automatic paper feeder of the present invention in a preferred embodiment.Fig. 7 has from top to bottom shown the rotating speed of CD-ROM drive motor, the sequential chart whether file sensor 15 detects file S and thickness detection module 14 detected thickness respectively; When automatic paper feeder 1 does not operate as yet; The rotating speed of CD-ROM drive motor is zero; File sensor 15 does not detect file S and is in the low accurate position of logic (that is logical zero), and thickness detection module 14 does not detect the thickness of file S yet.When automatic paper feeder 1 desire is presented entering paper-feeding channel 11 with a plurality of file S on the feeding box 10; The pickup roller 121 and the comber 122 of control unit 16 control paper taking modules 12 rotate toward the first hand of rotation C1; Make the first file S1 that contacts with pickup roller 121 and comber 122 be fed; Have a file friction force Fs between the first file S1 and the second file S2; And the friction wheel 13 that is positioned at paper taking module 12 belows contacts with the second file S2 and provides the first friction force F1 to the second file S2, and as the first friction force F1 during greater than file friction force Fs, the first file S1 is fed and gets into paper-feeding channel 11; And when the first friction force F1 was less than or equal to file friction force Fs, the first file S1 and the second file S2 all were fed and get into paper-feeding channel 11, that is dual paper feed (Double Feeding) takes place, and Fig. 1 shows the situation that dual paper feed takes place.
When a plurality of file S pass through paper taking module 12; A plurality of file S are detected by file sensor 15 and file sensor 15 is triggered and switch to the accurate position of high logic (that is logical one) by the accurate position of low logic; And a plurality of file S also are detected during through thickness detection module 14; Can know that by Fig. 7 file sensor 15 is triggered and is in logical one, and thickness detection module 14 detected thickness rise gradually.A plurality of file S continue to be fed; When thickness detection module 14 detects another thickness; And the thickness of a plurality of file S is during greater than a thickness default value (the general thickness default value is the thickness of single file), and dual paper feed takes place in expression, therefore; Thickness detection module 14 outputs one thickness signal is given control unit 16, makes control unit 16 control paper taking modules 12 move back paper.Be the time point t1 among Fig. 7 this moment, and paper taking module 12 is as shown in Figure 3 with the relation of a plurality of file S.
Next please consult Fig. 1, Fig. 4 and Fig. 7 simultaneously; When control unit 16 control paper taking modules 12 move back paper; Control unit 16 control paper taking modules 12 are swung and comber 122 are contacted with the first file S1; Pickup roller 121 then no longer contacts with the first file S1, and so the design-calculated purpose is because the rotating speed of pickup roller 121 is slow than comber 122, therefore; When moving back paper,, the bending that causes the first file S1 is damaged the first file S1 if pickup roller 121 and comber 122 all contact with the first file S1.When beginning toward second hand of rotation C2 rotation when comber 122 Be Controlled unit, 16 controls; Friction wheel 13 rotates toward the first hand of rotation C1 along with moving of the first file S1 and the second file S2; Therefore friction wheel 13 produces and levels off to zero the second damping torque T 2; The second friction force F2 corresponding to the second damping torque T 2 is also quite little; Make win file S1 and the second file S2 can overcome the resistance of the second friction force F2 and move toward feeding box 10 directions smoothly; And the second friction force F2 is less than the file friction force Fs between the first file S1 and the second file S2, so the first file S1 and the second file S2 are fed simultaneously, and end stretches out in the front end of the second file S2 before the first file S1.
Can know by Fig. 7; The rotating speed of CD-ROM drive motor descends gradually, and expression comber 122 begins to stop the rotation of the first hand of rotation C1, and when the rotating speed of CD-ROM drive motor is negative value; Represent that then comber 122 begins to stop the rotation of the second hand of rotation C2, that is counter-rotating.File sensor 15 still is in logical one, and expression is not passed through file sensor 15 as yet toward a plurality of file S that feeding box 10 moves.And thickness detection module 14 detected thickness descend gradually, represent that a plurality of file S little by little leave thickness detection module 14 and move toward feeding box 10.
Among Fig. 7, at time point t2, file sensor 15 switches to logical zero by logical one, and a plurality of file S that expression is moved toward feeding box 10 are through file sensor 15.Control unit 16 begin to calculate thus the time one delay time td; To wait for that a plurality of file S move on the feeding box 10 and guarantee that a plurality of file S are by withdrawing from fully in the paper-feeding channel 11; And the front end of the first file S1 is positioned at the below of paper taking module 1, and paper taking module 12 is as shown in Figure 5 with the relation of a plurality of file S.When delay time td through and when putting t3 the time of advent; Control unit 16 control paper taking modules 12 are swung and pickup roller 121 and comber 122 are all contacted with the first file S1; And control pickup roller 121 and comber 122 rotate to present the first file S1 once more toward the first hand of rotation C1 once more and get in the paper-feeding channel 11, and the relation of paper taking module 12 and a plurality of file S is as shown in Figure 6.What need special version is, delay time, td was the time that comber 122 rotates a specific number of turns, and this specific number of turns is the rotation number of turns that can a plurality of file S be fed to paper taking module 12 belows at least by file sensor 15.
What need special version is, automatic paper feeder of the present invention also can operate not being provided with under the situation of file sensor, operation situation and above-mentioned roughly the same, and difference is, the setting of delay time.When automatic paper feeder does not have file sensor; When control unit rotates toward second hand of rotation at paper taking module; Promptly begin the computing relay time, through after delay time, control unit control paper taking module rotates to present a plurality of files toward first hand of rotation and gets into paper-feeding channel; Wherein also rotate for comber the time of a specific number of turns, this specific number of turns is then for being fed to a plurality of files the rotation number of turns of paper taking module below at least by the thickness detection module delay time.
In addition, automatic paper feeder of the present invention also can provide another preferred embodiment, sees also Fig. 8, and it is the section of structure of friction wheel in another preferred embodiment of automatic paper feeder of the present invention.Only there is the structure of friction wheel different in this preferred embodiment and the above-mentioned preferred embodiment, the structure of friction wheel only is described so all the other elements will repeat no more.Friction wheel 23 comprises one first sleeve 231, one second sleeve 232, a coil spring 233, a free-wheel clutch 234 and a wheel shaft 235.First sleeve 231 has pipe 2311 in the sleeve; Second sleeve 232 is arranged in first sleeve 231; And second sleeve 232 has a sleeve outer tube 2321; Be positioned at an end of second sleeve 232, in order to sleeve in a pipe end in contact of 2311, the caliber d2 ' of pipe 2311 is less than the caliber d1 ' of sleeve outer tube 2321 in the sleeve.Coil spring 233 is arranged in first sleeve 231; One end of coil spring 233 is sheathed on the sleeve outer tube 2321 and forms one first spring portion 2331; The other end of coil spring 233 is sheathed in the sleeve on the pipe 2311 and forms one second spring portion 2332; And the first spring portion 2331 has one first spring inside diameter r1 '; The second spring portion 2332 has one second spring inside diameter r2 ' less than the first spring inside diameter r1 ', makes the magnitude of interference of the magnitude of interference of 2321 of the first spring portion 2331 and sleeve outer tubes greater than 2311 of pipes in the second spring portion 2332 and the sleeve.Free-wheel clutch 234 is arranged in second sleeve 232, carries out the rotation of first hand of rotation in order to stop second sleeve 232, and only makes second sleeve 232 carry out the rotation of second hand of rotation.Wheel shaft 235 passes first sleeve 231, second sleeve 232 and free-wheel clutch 234.
When friction wheel 23 rotates toward first hand of rotation; First sleeve 231 also rotates toward first hand of rotation; Second sleeve 232 is limited by free-wheel clutch 234 and can't rotates; The first spring portion 2331 is fixed on the sleeve outer tube 2321, and the second spring portion 2332 is reversed and is produced one first damping moment of torsion with respect to pipe 2311 in the sleeve.And when friction wheel 302 changes toward the rotation of second hand of rotation; First sleeve 231 also rotates toward second hand of rotation; The first spring portion 2331 is fixed on the sleeve outer tube 2321; And the second spring portion 2332 is fixed in the sleeve and manages on 2311, and second sleeve 232 is rotated in response to the rotation of first sleeve 231, and free-wheel clutch 234 produces the second damping moment of torsion with respect to wheel shaft 235 rotations; Wherein the first damping moment of torsion is greater than the second damping moment of torsion.
Because free-wheel clutch 234 can rotate with respect to wheel shaft 235 smoothly, so the magnitude of interference of 235 on free-wheel clutch 234 and wheel shaft is almost nil, so that the second damping moment of torsion levels off to is zero.And also level off to zero corresponding to second friction force of the second damping moment of torsion, make can receive drag effects hardly when a plurality of files are moved to feeding box by paper-feeding channel and can be removed smoothly.
Know according to above-mentioned; Automatic paper feeder of the present invention utilizes friction wheel that the damping moment of torsion of two kinds of directions can be provided; And this two damping has the torque different characteristic, thereby reaches file can move back paper under the condition of the loam cake of not opening automatic paper feeder function.Also can be after moving back the paper completion; Carry out paper feed once more and do not need to move back paper and the work of paper feed once more through manpower; Make the user can be when feed documents needn't supervise automatic paper feeder whether dual paper feed takes place, operate voluntarily and guarantee that file can be by complete scan and can transfer to automatic paper feeder in automatic paper feeder is other.
The above is merely preferred embodiment of the present invention; Be not in order to limit the scope of patent protection that the present invention applied for; Therefore all other do not break away from disclosed spirit and the equivalence accomplished changes or modify, and all should be contained in the scope of patent protection that the present invention applies for.
Claims (21)
1. automatic paper feeder, in order to present a plurality of files, this automatic paper feeder comprises:
One feeding box, in order to place these a plurality of files, wherein these a plurality of files comprise one first file and one second file;
One paper-feeding channel;
One paper taking module is in order to get into this paper-feeding channel with these a plurality of file feeds on this feeding box;
One friction wheel is arranged at the below of this paper taking module, and in order to contacting with this second file and to produce one first friction force and one second friction force, and this friction wheel comprises:
One friction wheel inwall;
One coil spring has one first spring portion and one second spring portion, and this first spring portion contacts with this friction wheel inwall, and the internal diameter of this first spring portion is greater than the internal diameter of this second spring portion; And
One wheel shaft passes this coil spring with fixing this coil spring; Wherein this second friction force is less than this first friction force;
One thickness detection module is arranged on this paper-feeding channel, exports a thickness signal in order to the thickness that detects these a plurality of files; And
One control unit is connected in this thickness detection module and this paper taking module, in order to control the direction of this paper taking module rotation according to this thickness signal; Wherein when the thickness of these a plurality of files is less than or equal to a thickness default value; This this paper taking module of control unit control continues to rotate toward one first hand of rotation, and the file friction force between this first file and this second file is presented this this paper-feeding channel of first file entering less than this first friction force; And when the thickness of these a plurality of files during greater than this thickness default value; This this paper taking module of control unit control rotates toward one second hand of rotation; And this second friction force makes these a plurality of files be fed to this less than this document friction force and gets paper box, and this control unit also rotates to present this a plurality of files toward this first hand of rotation at this paper taking module this paper taking module of control after the delay time that this second hand of rotation rotates and to get into these paper-feeding channels.
2. automatic paper feeder as claimed in claim 1; Wherein when these a plurality of files are fed to this paper-feeding channel by this feeding box; This friction wheel rotates toward this second hand of rotation; This first spring portion is reversed toward this second hand of rotation and is expanded, and gap between this first spring portion and this friction wheel inwall is reduced and be fixed, and this second spring portion is reversed with respect to this wheel shaft and produces one first damping moment of torsion corresponding to this first friction force; When these a plurality of files are fed to this feeding box by this paper-feeding channel; This friction wheel rotates toward this first hand of rotation; This second spring portion is fixed on this wheel shaft, and is increased gap between this first spring portion and this friction wheel inwall along with the rotation of this friction wheel with the one second damping moment of torsion of generation corresponding to this second friction force by this first spring portion of being expanded; Wherein this first damping moment of torsion is greater than this second damping moment of torsion.
3. whether automatic paper feeder as claimed in claim 1 is characterized in that also comprising a file sensor, is arranged at a side of this thickness detection module, and is connected in this control unit, pass through in order to detect these a plurality of files.
4. automatic paper feeder as claimed in claim 3; Wherein this document sensor is between this paper taking module and this thickness detection module; When detecting these a plurality of files and pass through; This document sensor is given this control unit through output one paper feed signal after this delay time, this this paper taking module of control unit control is rotated to present these a plurality of files toward this first hand of rotation get into this paper-feeding channel.
5. automatic paper feeder as claimed in claim 3, wherein this document sensor is a swing arm touch sensor.
6. automatic paper feeder as claimed in claim 1, wherein this paper taking module comprises a pickup roller and a comber, this pickup roller rotates along with the rotation of this comber synchronously, and this pickup roller is identical with the hand of rotation of this comber.
7. automatic paper feeder as claimed in claim 6, wherein when this paper taking module rotated toward this second hand of rotation, this paper taking module was swung and this pickup roller is not contacted with these a plurality of files.
8. automatic paper feeder as claimed in claim 6 wherein should rotate time of a specific number of turns delay time for this comber.
9. automatic paper feeder as claimed in claim 1, wherein this thickness detection module also comprises:
One detection arm is positioned on this paper-feeding channel, in order to when these a plurality of files through the time replace this detection arm and be moved; And
One optical displacement sensitive member is arranged at a side of this detection arm, obtains the thickness of these a plurality of files in order to the displacement of measuring this detection arm.
10. automatic paper feeder as claimed in claim 1 is characterized in that also comprising:
One paper feed roller is arranged on this paper-feeding channel, in order to present these a plurality of files to this paper-feeding channel;
One paper output box is arranged under this feeding box the side, these a plurality of files that are fed in order to placement; And
One paper delivery roller set is in order to present these a plurality of files to this paper output box.
11. an automatic paper feeder, in order to present a plurality of files, this automatic paper feeder comprises:
One feeding box, in order to place these a plurality of files, wherein these a plurality of files comprise one first file and one second file;
One paper-feeding channel;
One paper taking module is in order to get into this paper-feeding channel with these a plurality of file feeds on this feeding box;
One friction wheel is arranged at the below of this paper taking module, and in order to contacting with this second file and to produce one first friction force and one second friction force, and this friction wheel comprises:
One first sleeve has pipe in the sleeve;
One second sleeve is arranged in this first sleeve, and this second sleeve has a sleeve outer tube, is positioned at an end of this second sleeve, in order to this sleeve in the end in contact of managing;
One coil spring; Be arranged in this first sleeve; This helical spring end is sheathed on this sleeve outer tube and forms one first spring portion; This helical spring other end is sheathed in this sleeve pipe and goes up and form one second spring portion, and this first spring portion has one first spring inside diameter, and this second spring portion has one second spring inside diameter less than this first spring inside diameter;
One free-wheel clutch is arranged in this second sleeve, carries out the rotation of one first hand of rotation in order to stop this second sleeve; And
One wheel shaft passes this first sleeve, this second sleeve and this free-wheel clutch; Wherein this second friction force is less than this first friction force;
One thickness detection module is arranged on this paper-feeding channel, exports a thickness signal in order to the thickness that detects these a plurality of files; And
One control unit is connected in this thickness detection module and this paper taking module, in order to control the direction of this paper taking module rotation according to this thickness signal; Wherein when the thickness of these a plurality of files is less than or equal to a thickness default value; This this paper taking module of control unit control continues to rotate toward one first hand of rotation, and the file friction force between this first file and this second file is presented this this paper-feeding channel of first file entering less than this first friction force; And when the thickness of these a plurality of files during greater than this thickness default value; This this paper taking module of control unit control rotates toward one second hand of rotation; And this second friction force makes these a plurality of files be fed to this less than this document friction force and gets paper box, and this control unit also rotates to present this a plurality of files toward this first hand of rotation at this paper taking module this paper taking module of control after the delay time that this second hand of rotation rotates and to get into these paper-feeding channels.
12. automatic paper feeder as claimed in claim 11; Wherein when these a plurality of files are fed to this paper-feeding channel by this feeding box; This first sleeve rotates toward this first hand of rotation; This second sleeve is limited by this free-wheel clutch and can't rotates, and this first spring portion is fixed on this sleeve outer tube, and the second spring portion is reversed with respect to pipe in this sleeve and produces one first damping moment of torsion; When this second file is fed to this feeding box by this paper-feeding channel; This first sleeve rotates toward this second hand of rotation; This first spring portion is fixed on this sleeve outer tube; And this second spring portion makes this second sleeve rotate along with the rotation of this first sleeve on being fixed in and managing in this sleeve, and this free-wheel clutch produces this second damping moment of torsion with respect to this wheel shaft rotation; Wherein this first damping moment of torsion is greater than this second damping moment of torsion.
13. automatic paper feeder as claimed in claim 11, wherein the caliber of pipe makes the magnitude of interference between this first spring portion and this sleeve outer tube greater than the magnitude of interference between managing in this second spring portion and this sleeve less than the caliber of this sleeve outer tube in this sleeve.
14. whether automatic paper feeder as claimed in claim 11 is characterized in that also comprising a file sensor, is arranged at a side of this thickness detection module, and is connected in this control unit, pass through in order to detect these a plurality of files.
15. automatic paper feeder as claimed in claim 14; Wherein this document sensor is between this paper taking module and this thickness detection module; When detecting these a plurality of files and pass through; This document sensor is given this control unit through output one paper feed signal after this delay time, this this paper taking module of control unit control is rotated to present these a plurality of files toward this first hand of rotation get into this paper-feeding channel.
16. automatic paper feeder as claimed in claim 14, wherein this document sensor is a swing arm touch sensor.
17. automatic paper feeder as claimed in claim 11, wherein this paper taking module comprises a pickup roller and a comber, and this pickup roller rotates along with the rotation of this comber synchronously, and this pickup roller is identical with the hand of rotation of this comber.
18. automatic paper feeder as claimed in claim 17, wherein when this paper taking module rotated toward this second hand of rotation, this paper taking module was swung and this pickup roller is not contacted with these a plurality of files.
19. automatic paper feeder as claimed in claim 17 wherein should rotate time of a specific number of turns delay time for this comber.
20. automatic paper feeder as claimed in claim 11, wherein this thickness detection module also comprises:
One detection arm is positioned on this paper-feeding channel, in order to when these a plurality of files through the time replace this detection arm and be moved; And
One optical displacement sensitive member is arranged at a side of this detection arm, obtains the thickness of these a plurality of files in order to the displacement of measuring this detection arm.
21. automatic paper feeder as claimed in claim 11 is characterized in that also comprising:
One paper feed roller is arranged on this paper-feeding channel, in order to present these a plurality of files to this paper-feeding channel;
One paper output box is arranged under this feeding box the side, these a plurality of files that are fed in order to placement; And
One paper delivery roller set is in order to present these a plurality of files to this paper output box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010003513 CN102120533B (en) | 2010-01-12 | 2010-01-12 | Automatic paper feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010003513 CN102120533B (en) | 2010-01-12 | 2010-01-12 | Automatic paper feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102120533A CN102120533A (en) | 2011-07-13 |
| CN102120533B true CN102120533B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010003513 Expired - Fee Related CN102120533B (en) | 2010-01-12 | 2010-01-12 | Automatic paper feeding device |
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| Country | Link |
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| CN (1) | CN102120533B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767902A (en) * | 2014-01-06 | 2015-07-08 | 光宝电子(广州)有限公司 | Automatic paper feeding image scanning device and operation method thereof |
| CN104709738A (en) * | 2015-01-19 | 2015-06-17 | 哈尔滨市君诚信电子有限公司 | Paper separating mechanism of paper feed bin |
| US10894678B2 (en) * | 2016-09-07 | 2021-01-19 | Hewlett-Packard Development Company, L.P. | Pick arm raise with one-way clutch and torque limiter |
| CN110386498B (en) * | 2018-04-20 | 2022-03-25 | 北京太章机电设备有限公司 | Sorting device for disordered documents |
| TWI679124B (en) * | 2018-12-11 | 2019-12-11 | 虹光精密工業股份有限公司 | Feeding mechanism for business machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050001A (en) * | 1989-04-28 | 1991-03-20 | 株式会社精工舍 | Automatic sheet feeder |
| DE19605106A1 (en) * | 1995-02-10 | 1996-08-14 | Nec Corp | Mail feeder for small postal items |
| CN1550437A (en) * | 2003-05-14 | 2004-12-01 | ��ʽ���綫֥ | Overlapped-sheet detection apparatus and method thereof |
| CN1919709A (en) * | 2006-09-04 | 2007-02-28 | 山东山大鸥玛软件有限公司 | Control apparatus for paper feeding and separating |
| CN101580185A (en) * | 2008-05-14 | 2009-11-18 | 崴强科技股份有限公司 | Device and method for overlapping paper feed detection |
-
2010
- 2010-01-12 CN CN 201010003513 patent/CN102120533B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1050001A (en) * | 1989-04-28 | 1991-03-20 | 株式会社精工舍 | Automatic sheet feeder |
| DE19605106A1 (en) * | 1995-02-10 | 1996-08-14 | Nec Corp | Mail feeder for small postal items |
| CN1550437A (en) * | 2003-05-14 | 2004-12-01 | ��ʽ���綫֥ | Overlapped-sheet detection apparatus and method thereof |
| CN1919709A (en) * | 2006-09-04 | 2007-02-28 | 山东山大鸥玛软件有限公司 | Control apparatus for paper feeding and separating |
| CN101580185A (en) * | 2008-05-14 | 2009-11-18 | 崴强科技股份有限公司 | Device and method for overlapping paper feed detection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102120533A (en) | 2011-07-13 |
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