CN102120532A - Friction wheel and friction wheel module using same - Google Patents
Friction wheel and friction wheel module using same Download PDFInfo
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- CN102120532A CN102120532A CN2010100025072A CN201010002507A CN102120532A CN 102120532 A CN102120532 A CN 102120532A CN 2010100025072 A CN2010100025072 A CN 2010100025072A CN 201010002507 A CN201010002507 A CN 201010002507A CN 102120532 A CN102120532 A CN 102120532A
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Abstract
The invention relates to a friction wheel and a friction wheel module using the same. The friction wheel is used in an automatic paper feeder to provide a friction force for separating files. The friction wheel provided by the invention can generate a first damping torque and a second damping torque in opposite directions; and the second damping torque is smaller than the first damping torque so as to reduce the friction resistance when the files exit from the automatic paper feeder. Compared with the existing friction wheel of an automatic paper feeder, the friction wheel is more convenient to disassemble and assemble; the existing friction wheel of the automatic paper feeder only allows the files to move in the paper feeding direction, but the friction wheel provided by the invention also allows the files to move in the paper exiting direction; and in the case of paper jam, a user can fetch the files without opening an upper cover of the automatic paper feeder.
Description
Technical field
The present invention relates to a kind of friction wheel, relate in particular to the friction wheel that is applied in the automatic paper feeder.
Background technology
Early stage scanner unit only can scan the image of individual file, when the user desires scanning double-side file, must be with manual mode with the file turn-over to allow the image that scanner unit can the scanning document another side.And when the folded file of user's desire scanning one, then must be after scanner unit scan a file, taking-up scan the file of finishing and place next file on scanner unit to carry out the scanning of next file.Because manually turn-over file and manual alternate file too bother, and therefore develop automatic paper feeder on the market, cooperate the scanning that scanner unit uses then not to be needed manual turn-over and can finish duplex scanning and many files.
Generally speaking, automatic paper feeder all is provided with a paper taking module, in order to a folded file is presented and is moved to enter in the automatic paper feeder toward a paper feed direction by the feeding box of placing file, in the file feed process, only there is one in order to ensure present the file that enters in the automatic paper feeder at every turn, except a comber is set in paper taking module, also need one friction lining be set in the comber below, can provide friction force to the file that contacts with friction lining, 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, and file that contacts with friction lining and the friction force between friction lining are also greater than the friction force between file, to guarantee that only presenting a file enters in the automatic paper feeder at every turn.Along with the elongation of the period of service of automatic paper feeder, friction lining is abrasion thereupon also, make friction lining can't guarantee the separation function, therefore must renewal of facing, and known friction lining is to be locked on the automatic paper feeder, quite inconvenience when renewal of facing.
In view of this, No. 6659450 bulletin case of US Patent discloses a kind of automatic paper feeder of being convenient to dismantle friction lining and friction wheel.When the file paper feed, friction wheel produces the damping moment of torsion of a paper feed rotation direction, therefore provides a friction force to file.Though the disclosed friction lining of automatic paper feeder and the more known friction lining of friction wheel of No. 6659450 bulletin case of US Patent are for convenience detach, but after the friction wheel dismounting, provide the spring of friction wheel one positive force still to be left in the automatic paper feeder, when the assembling friction wheel, the user must be assembled in friction wheel on the automatic paper feeder, and simultaneously with friction wheel in alignment with spring just can make the friction wheel normal operation in conjunction with friction wheel and spring, so assemble method too inconvenience.
In addition, when automatic paper feeder generation paperboard (Jamming), owing to be provided with friction wheel or friction lining, therefore, when user's desire is pullled out by automatic paper feeder with jammed file, owing to contacting with friction wheel or friction lining, file has friction force, therefore the user can't be directly with file toward in contrast to paper feed direction-move back that the paper direction moves and with it by pulling out in the automatic paper feeder, and the necessary loam cake of opening automatic paper feeder, make paper taking module leave the file top, and file does not contact with friction wheel or friction lining yet and does not have friction force, and at this moment, file just can be removed.In view of so complicated, therefore, need a kind ofly make the past paper feed direction of file and move back the friction wheel that the paper direction moves, to allow the user need not open loam cake with regard to desirable outfile by the method for taking out file in the automatic paper feeder.
Summary of the invention
The object of the present invention is to provide a kind of have can make file toward paper feed direction and move back the friction wheel that the paper direction moves.
Another object of the present invention is to provide a kind of convenient dismounting and stack-mounted friction wheel module.
In a preferred embodiment, the invention provides a kind of friction wheel, be applied to an automatic paper feeder, so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, and this friction wheel comprises:
One sleeve has a sleeve lining;
One friction pad is surrounded on this sleeve, in order to contact with this second file;
One coil spring, be arranged in this sleeve, this coil spring has one first spring portion and one second spring portion, and this first spring portion has one first spring inside diameter, this second spring portion has one second spring inside diameter less than this first spring inside diameter, and this first spring portion contacts with this sleeve lining; And
One wheel shaft passes this coil spring and contacts with this second spring portion; Wherein when this second file moves toward a first direction, this sleeve rotates toward one first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this sleeve lining, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward the second direction in contrast to this first direction, this sleeve rotates toward one second hand of rotation, this second spring portion is fixed on this wheel shaft, and this first spring portion is reversed and produces one second damping moment of torsion; Wherein this first damping moment of torsion is greater than this second damping moment of torsion.
In a preferred embodiment, one first inner wall part of this sleeve lining has one first sleeve diameter, and this first inner wall part approaches an end of this sleeve, and one second inner wall part of this sleeve lining has one second sleeve diameter, and this second inner wall part approaches an other end of this sleeve; Wherein this first sleeve diameter is less than this second sleeve diameter.
In a preferred embodiment, this sleeve lining is a tilt internal wall.
In a preferred embodiment, this first spring portion contacts with this first inner wall part, this second spring portion does not contact and contacts with this wheel shaft with this second inner wall part, when this sleeve rotates toward this first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this first inner wall part, and the second spring portion is reversed and is produced this first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward this second direction, this sleeve rotates toward one second hand of rotation, and this second spring portion is fixed by this wheel shaft, and this first spring portion is reversed and produces this second damping moment of torsion.
In a preferred embodiment, this first spring portion off-centre is connected in this second spring portion.
In a preferred embodiment, friction wheel of the present invention comprises that also one holds axle, stretches into this end of this sleeve, is used to hold when this wheel shaft stretches into this other end of this sleeve this wheel shaft.
In a preferred embodiment, the present invention also provides a kind of friction wheel, is applied to an automatic paper feeder, and so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, 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 an end in contact of pipe;
One friction pad is surrounded on this first sleeve, in order to contact with this second file;
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 on to manage in this sleeve and upward forms 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 when this second file moves toward a first direction, this first sleeve rotates toward this first hand of rotation, this second sleeve is limited by this free-wheel clutch and can't rotates, this first spring portion is fixed on this sleeve outer tube, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to pipe in this sleeve; When this second file moves toward the second direction in contrast to this first direction, this first sleeve rotates toward one second hand of rotation, this first spring portion is fixed on this sleeve outer tube, and this second spring portion is fixed on the interior pipe of this sleeve, and this second sleeve is rotated along with the rotation of this first 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 pipe in this second spring portion and this sleeve less than the caliber of this sleeve outer tube in this sleeve.
In a preferred embodiment, the present invention also provides a kind of friction wheel module of using friction wheel, is applied to an automatic paper feeder, so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, and this friction wheel module comprises:
One friction wheel support;
One friction wheel is set on this friction wheel support, and this friction wheel comprises:
One sleeve has a sleeve lining;
One friction pad is surrounded on this sleeve, in order to contact with this second file;
One coil spring, be arranged in this sleeve, this coil spring has one first spring portion and one second spring portion, and this first spring portion has one first spring inside diameter, this second spring portion has one second spring inside diameter less than this first spring inside diameter, and this first spring portion contacts with this sleeve lining; And
One wheel shaft passes this coil spring and contacts with this second spring portion; Wherein when this second file moves toward a first direction, this sleeve rotates toward one first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this sleeve lining, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward the second direction in contrast to this first direction, this sleeve rotates toward one second hand of rotation, this second spring portion is fixed on this wheel shaft, and this first spring portion is reversed and produces one second damping moment of torsion; Wherein this first damping moment of torsion is greater than this second damping moment of torsion; And
One elastic element is arranged on this friction wheel support, and contacts with this friction wheel, to this friction wheel this friction wheel is moved up and down in order to an elastic force to be provided with respect to this friction wheel support.
In a preferred embodiment, one first inner wall part of this sleeve lining has one first sleeve diameter, and this first inner wall part approaches an end of this sleeve, and one second inner wall part of this sleeve lining has one second sleeve diameter, and this second inner wall part approaches an other end of this sleeve; Wherein this first sleeve diameter is less than this second sleeve diameter.
In a preferred embodiment, this sleeve lining is a tilt internal wall.
In a preferred embodiment, this first spring portion contacts with this first inner wall part, this second spring portion does not contact and contacts with this wheel shaft with this second inner wall part, when this sleeve rotates toward this first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this first inner wall part, and the second spring portion is reversed and is produced this first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward this second direction, this sleeve rotates toward one second hand of rotation, and this second spring portion is fixed by this wheel shaft, and this first spring portion is reversed and produces this second damping moment of torsion.
In a preferred embodiment, this first spring portion off-centre is connected in this second spring portion.
In a preferred embodiment, friction wheel module of the present invention comprises that also one holds axle, stretches into this end of this sleeve, is used to hold when this wheel shaft stretches into this other end of this sleeve this wheel shaft.
In a preferred embodiment, this elastic element also comprises a torsion spring arm, in order to contact with this friction wheel and to provide this elastic force to this wheel shaft, this friction wheel is moved up and down with respect to this friction wheel support.
In a preferred embodiment, this elastic element is a support torsion spring.
In a preferred embodiment, this wheel shaft also comprises a restriction edge, in order to be fixed in this friction wheel support, this wheel shaft is fixed and can't rotates.
In a preferred embodiment, the present invention also provides a kind of friction wheel module of using friction wheel, is applied to an automatic paper feeder, so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, and this friction wheel module comprises:
One friction wheel support;
One friction wheel is set on this friction wheel support, 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 an end in contact of pipe;
One friction pad is surrounded on this first sleeve, in order to contact with this second file;
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 on to manage in this sleeve and upward forms 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 when this second file moves toward a first direction, this first sleeve rotates toward this first hand of rotation, this second sleeve is limited by this free-wheel clutch and can't rotates, this first spring portion is fixed on this sleeve outer tube, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to pipe in this sleeve; When this second file moves toward the second direction in contrast to this first direction, this first sleeve rotates toward one second hand of rotation, this first spring portion is fixed on this sleeve outer tube, and this second spring portion is fixed on the interior pipe of this sleeve, and this second sleeve is rotated along with the rotation of this first 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; And
One elastic element is arranged on this friction wheel support, and contacts with this friction wheel, to this friction wheel this friction wheel is moved up and down in order to an elastic force to be provided with respect to this friction wheel support.
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 pipe in this second spring portion and this sleeve less than the caliber of this sleeve outer tube in this sleeve.
In a preferred embodiment, this wheel shaft also comprises a restriction edge, in order to be fixed in this friction wheel support, this wheel shaft is fixed and can't rotates.
In a preferred embodiment, this elastic element also comprises a torsion spring arm, in order to contact with this friction wheel and to provide this elastic force to this wheel shaft, this friction wheel is moved up and down with respect to this friction wheel support.
In a preferred embodiment, this elastic element is a support torsion spring.
Compare with the friction wheel of existing automatic paper feeder, this friction wheel is more convenient for dismantling and assembling, and the friction wheel of existing automatic paper feeder only allows file to move on paper feed direction, and this friction wheel also allows file to move moving back on the paper direction, when the situation of paperboard took place, the user need not open the loam cake of automatic paper feeder with regard to desirable outfile.
Description of drawings
Structure side view when Fig. 1 is in the paper feed state for friction wheel module of the present invention in first preferred embodiment.
Fig. 2 is the structural upright exploded drawings of friction wheel module of the present invention in first preferred embodiment.
Fig. 3 is the structural representation of friction wheel module of the present invention in first preferred embodiment.
Fig. 4 is the section of structure of friction wheel of the present invention in first preferred embodiment.
Fig. 5 is that friction wheel module of the present invention is in the structure side view when moving back the paper state in first preferred embodiment.
Fig. 6 A, 6B and 6C are disassembled in first preferred embodiment/the stack-mounted structural representation for friction wheel module of the present invention.
Fig. 7 is the section of structure of friction wheel of the present invention in second preferred embodiment.
Fig. 8 is the structural upright exploded drawings of friction wheel module of the present invention in the 3rd preferred embodiment.
Fig. 9 is the section of structure of friction wheel module of the present invention in the 3rd preferred embodiment.
Wherein, description of reference numerals is as follows:
1 automatic paper feeder, 10,30 friction wheel modules
20 paper-fetching mechanisms, 101,301 friction wheel supports
102,202,302 friction wheels, 103,303 elastic elements
1021,2021,3021,3022 sleeves, 1022,2022,3023 friction pads
1023,2023,3024 coil springs, 1024,2024,3026 wheel shafts
2025 hold axle 3025 free-wheel clutchs
10241,30261 restriction edges, 20,211 first sleeve parts
Pipe in 20,212 second sleeve parts, 30211 sleeves
30221 sleeve outer tube A1, A2 direction
C1, C2 hand of rotation d1, d2 sleeve diameter
D1 ', d2 ' caliber r1, r2, r1 ', r2 ' spring inside diameter
10231,20231,30,241 first spring portions
10232,20232,30,242 second spring portions
The specific embodiment
The invention provides a kind of friction wheel module that is applied in the automatic paper feeder.See also Fig. 1, the structure side view when it is in the paper feed state for friction wheel module of the present invention in first preferred embodiment.Fig. 1 shows that friction wheel module of the present invention is set in the automatic paper feeder 1, automatic paper feeder 1 comprises a friction wheel module 10 and a paper-fetching mechanism 20, paper-fetching mechanism 20 enters in the automatic paper feeder 1 in order to one first file S1 and one second file S2 are presented, and 10 of friction wheel modules are separated with the second file S2 in order to the first file S1 that provides a friction force to make to the second file S2 to be positioned at second file S2 top.
Next the structure of friction wheel module 10 is described, please consult Fig. 2 and Fig. 3 simultaneously, Fig. 2 is the structural upright exploded drawings of friction wheel module of the present invention in first preferred embodiment, and Fig. 3 is the structural representation of friction wheel module of the present invention in first preferred embodiment.Friction wheel module 10 comprises a friction wheel support 101, a friction wheel 102 and an elastic element 103.Friction wheel support 101 is in order to place friction wheel 102, and elastic element 103 is arranged at friction wheel support 101 and contact with friction wheel 102, in order to provide an elasticity positive force to friction wheel 102, friction wheel 102 is moved up and down with respect to friction wheel support 101, in this preferred embodiment, elastic element 103 is for supporting torsion spring.
Structure as for friction wheel 102 then sees also Fig. 4, and it is the section of structure of friction wheel of the present invention in first preferred embodiment.The friction wheel 102 that is set on the friction wheel support 101 comprises a sleeve 1021, a friction pad 1022, a coil spring 1023 and a wheel shaft 1024.Sleeve 1021 has a sleeve lining 10211, and friction pad 1022 is surrounded on sleeve 1021, and in order to contact with the second file S2 and friction force is provided, in this preferred embodiment, friction pad 1022 is a rubbery cover tyre.Coil spring 1023 is arranged in the sleeve 1021, coil spring 1023 has one first spring portion 10231 and one second spring portion 10232, and the first spring portion 10231 has one first spring inside diameter r1, the second spring portion 10232 has one second spring inside diameter r2, the first spring portion 10231 contacts with sleeve lining 10211, and the second spring portion 10232 does not contact with sleeve lining 10211, wherein the second spring inside diameter r2 is less than the first spring inside diameter r1, and the first spring portion, 10231 off-centre are connected in the second spring portion 10232.Wheel shaft 1024 passes coil spring 1023 and contacts with support torsion spring 103, receiving the elasticity positive force of self-supporting torsion spring 103, and wheel shaft 1024 also comprises a restriction edge 1024, in order to be fixed in friction wheel support 101, wheel shaft 1024 is fixed and can't rotates, as Fig. 2 and shown in Figure 3.
Please consult Fig. 1 once more, when automatic paper feeder 1 desires to present the first file S1 and the second file S2, the pickup roller of paper-fetching mechanism 20 and comber rotate to present the first file S1 and the second file S2 toward one second hand of rotation C2 the first and second file S1, S2 are moved toward a first direction A1, the friction pad 1022 of friction wheel 102 contacts and is rotated with the second file S2, and wherein friction wheel 102 rotates toward the one first hand of rotation C1 opposite with the second hand of rotation C2.In this preferred embodiment, first direction A1 is a paper feed direction, and the first hand of rotation C1 is an anticlockwise direction, and the second hand of rotation C2 is a clockwise direction.When the first file S1 and the second file S2 are fed and when moving toward first direction A1, the first file S1 and the second file S2 will replace friction wheel 102, friction wheel 102 is moved down with respect to friction wheel support 101, and the first file S1 and the second file S2 then are able to enter automatic paper feeder 1 inside by paper-fetching mechanism 20 and friction wheel module 10.
When friction wheel 102 contacts toward first hand of rotation C1 rotation because of friction pad 1022 with the second file S2, the sleeve 1021 of friction wheel 102 also rotates toward the first hand of rotation C1, and the sleeve lining 10211 that the first spring portion 10231 that contacts with sleeve lining 10211 is rotated reverses toward the first hand of rotation C1, the first spring portion 10231 since the rotation direction of coil spring 1023 and expanded, the internal diameter of the first spring portion 10231 is expanded to greater than the first spring inside diameter r1 originally.At this moment, the gap of 10211 of the first spring portion 10231 and sleeve linings is reduced (that is the magnitude of interference of the first spring portion 10231 and 10211 of sleeve linings increases) and the first spring portion 10231 is fixed on (tight Shu Yu) and the sleeve lining 10211.Simultaneously, the second spring portion 10232 is reversed with respect to wheel shaft 1024, and the second spring portion 10232 must overcome the internal stress that produces because of the magnitude of interference between the second spring portion 10232 and the wheel shaft 1024 and produces the first damping torque T 1.Therefore, friction wheel 102 provides one first friction force corresponding to the first damping torque T 1 to the second file S2, makes the second file S2 to be fed, and simultaneously, the first file S1 is presented by paper taking module 20 and moves toward first direction A1.
Next see also Fig. 5, it is that friction wheel module of the present invention is in the structure side view when moving back the paper state in first preferred embodiment.When being fed, the first file S1 enters in the automatic paper feeder 1 and when paperboard takes place, must be with the first file S1 by taking out in the automatic paper feeder 1, generally be that the first file S1 is moved toward the second direction A2 in contrast to first direction A1, so that take out the first file S1, in this preferred embodiment, second direction A2 moves back the paper direction.When the first file S1 moves toward second direction A2, friction wheel 102 changes the rotation toward the second hand of rotation C2 because of friction pad 1022 contacts with the second file S2, the sleeve 1021 of friction wheel 102 also rotates toward the second hand of rotation C2, the second spring portion 10232 is owing to the factor of the rotation direction of coil spring 1023 is fixed on (tight Shu Yu) wheel shaft 1024, and the first spring portion 10231 that contacts with sleeve lining 10211 is also reversed toward the second hand of rotation C2 along with the rotation of sleeve lining 10211, and the first spring portion 10231 must overcome the internal stress that produces because of the magnitude of interference between the first spring portion 10231 and the sleeve lining 10211 and produces the second damping torque T 2.Therefore, friction wheel 102 provides one second friction force to the second file S2, because the magnitude of interference that the first spring portion 10231 and sleeve lining are 10211 is quite little, therefore the second damping torque T 2 is quite little, so also quite little, make the second file S2 be moved that Shi Buhui is subjected to too big drag effects and be removed in can be by automatic paper feeder 1 in second direction A2 corresponding to second friction force of the second damping torque T 2.
What need special version is, damping moment of torsion and friction force present the relation of direct ratio, that is the first damping torque T 1 is big more, and first friction force is also big more thereupon, otherwise the second damping torque T 2 is more little, and second friction force is then more little.
Next please consult Fig. 6 A, Fig. 6 B and Fig. 6 C in regular turn, it is disassembled in first preferred embodiment/the stack-mounted structural representation for friction wheel module of the present invention.When user's desire disassembles friction wheel module 10 on by automatic paper feeder 1, only need both sides, and upset friction wheel module 10 is detachable friction wheel module 10 with hand-held friction wheel 102.Otherwise, when user's desire assembling friction wheel module 10 is on automatic paper feeder 1, only need can assemble according to the order of Fig. 6 C, Fig. 6 B to Fig. 6 A.
In addition, the present invention also provides second preferred embodiment of friction wheel and friction wheel module, sees also Fig. 7, and it is the section of structure of friction wheel of the present invention in second preferred embodiment.The present invention's second preferred embodiment is identical with the first preferred embodiment major part, difference is friction wheel 202 in-to-in structures, and friction wheel 202 comprises that a sleeve 2021, a friction pad 2022, a coil spring 2023, a wheel shaft 2024 and hold axle 2025.Sleeve 2021 has one first inner wall part 20211 and one second inner wall part 20212, and first inner wall part 20211 has one first sleeve diameter d1, and first inner wall part 20211 approaches an end of sleeve 2021, and second inner wall part 20212 has one second sleeve diameter d2, and second inner wall part 20212 approaches the other end of sleeve 2021, and the first sleeve diameter d1 is less than the second sleeve diameter d2, and the inwall of its middle sleeve 2021 is a tilt internal wall, also is similar tapered inwall.
And friction pad 2022 is surrounded on sleeve 2021, and in order to contact with the second file S2 and friction force is provided, in this preferred embodiment, friction pad 2022 also is a rubbery cover tyre.Coil spring 2023 is arranged in the sleeve 2021, coil spring 2023 has one first spring portion 20231 and one second spring portion 20232, and the first spring portion 20231 has one first spring inside diameter r1, the second spring portion 20232 has one second spring inside diameter r2, the first spring portion 20231 contacts with first inner wall part 20211, and the second spring portion 20232 does not contact with second inner wall part 20212, wherein the second spring inside diameter r2 is less than the first spring inside diameter r1, and the first spring portion, 20231 off-centre are connected in the second spring portion 20232.Wheel shaft 2024 passes coil spring 2023 and wheel shaft 2024 and is inserted into wherein by the other end of sleeve 2021, stretches into and can hold wheel shaft 2024 and hold axle 2025 other ends by sleeve 2021.
Next be illustrated in automatic paper feeder and carry out paper feed when work, the operative scenario of friction wheel 202, and other element except that the work of friction wheel is all identical with first preferred embodiment in the automatic paper feeder, and do not add explanation.When first file and second file are fed, friction wheel 202 rotates because of friction pad 2022 contacts with second file toward first hand of rotation, the sleeve 2021 of friction wheel 202 also rotates toward first hand of rotation, and first inner wall part, 20211 past first hand of rotation that the first spring portion 20231 that contacts with first inner wall part 20211 is rotated reverse and expand, the first spring portion 20231 is fixed on first inner wall part 20211, and the second spring portion 20232 is reversed with respect to wheel shaft 2024, and the second spring portion 20232 must overcome the internal stress that produces because of the magnitude of interference between the second spring portion 20232 and the wheel shaft 2024 and produces the first damping moment of torsion.Therefore, friction wheel 202 provides first friction force corresponding to the first damping moment of torsion to second file, makes second file to be fed, and first file is then presented by paper taking module 20 and moved toward first direction.
When being fed, first file enters in the automatic paper feeder and when paperboard takes place, must be with first file by taking out in the automatic paper feeder, when first file moves toward the second direction in contrast to first direction, friction wheel 202 changes because of friction pad 2022 contacts with second file toward second hand of rotation rotation in contrast to first hand of rotation, the sleeve 2021 of friction wheel 202 also rotates toward second hand of rotation, the second spring portion 20232 is owing to the factor of the rotation direction of coil spring 2023 is fixed on (tight Shu Yu) wheel shaft 2024, and the first spring portion 20231 that contacts with first inner wall part 20211 is also reversed toward second hand of rotation along with the rotation of first inner wall part 20211, and the first spring portion 20231 must overcome the internal stress that produces because of the magnitude of interference between the first spring portion 20231 and first inner wall part 20211 and produces the second damping moment of torsion.Therefore, friction wheel 202 provides one to level off to zero second friction force to the second file S2, makes second file be moved that Shi Buhui is subjected to too big drag effects and be removed in can be by automatic paper feeder in second direction.
What need special version is that the sleeve 2021 in second preferred embodiment has first inner wall part 20211 and second inner wall part 20212, and the inwall of sleeve 2021 is a tilt internal wall.First inner wall part 20211 of sleeve 2021 narrows down progressively, makes that the interference of 20211 of the first spring portion 20231 be arranged in sleeve 2021 and first inner wall parts is comparatively even, makes that the generation of damping moment of torsion is more smooth and easy and stable.
In addition, the present invention also provides the 3rd preferred embodiment with preferable effect, please consult Fig. 8 and Fig. 9 simultaneously, Fig. 8 is the structural upright exploded drawings of friction wheel module of the present invention in the 3rd preferred embodiment, and Fig. 9 is the section of structure of friction wheel module of the present invention in the 3rd preferred embodiment.Friction wheel module 30 comprises a friction wheel support 301, a friction wheel 302 and an elastic element 303.Friction wheel support 301 is in order to place friction wheel 302, and elastic element 303 is arranged at friction wheel support 301 and contact with friction wheel 302, in order to provide an elasticity positive force to friction wheel 302, friction wheel 302 is moved up and down with respect to friction wheel support 301, in this preferred embodiment, elastic element 303 is for supporting torsion spring.
Next the structure of friction wheel 302 is described, friction wheel 302 comprises one first sleeve 3021, one second sleeve 3022, a friction pad 3023, a coil spring 3024, a free-wheel clutch 3025 and a wheel shaft 3026.First sleeve 3021 has pipe 30211 in the sleeve, second sleeve 3022 is arranged in first sleeve 3021, and second sleeve 3022 has a sleeve outer tube 30221, be positioned at an end of second sleeve 3022, in order to sleeve in a pipe end in contact of 30211, the caliber d2 ' of pipe 30211 makes the magnitude of interference of the magnitude of interference of 30221 of the first spring portion 30241 and sleeve outer tubes greater than 30211 of pipes in the second spring portion 30242 and the sleeve less than the caliber d1 ' of sleeve outer tube 30221 in the sleeve.
Next the situation of friction wheel module work is described, when automatic paper feeder desires to present first file (not being shown among the figure) and second file (not being shown among the figure), paper-fetching mechanism (not being shown among the figure) second hand of rotation rotates to present first file and second file first and second file is moved toward a first direction (not being shown among the figure), at this moment, first file and second file are replaced friction wheel 302, friction wheel 302 is moved down with respect to friction wheel support 301, and first file and second file are entered in the automatic paper feeder.When friction wheel 302 contacts toward the rotation of first hand of rotation because of friction pad 3023 with second file, first sleeve 3021 also rotates toward first hand of rotation, second sleeve 3022 is limited by free-wheel clutch 3025 and can't rotates, the first spring portion 30241 is fixed on the sleeve outer tube 30221, and the second spring portion 30242 is reversed and is produced one first damping moment of torsion with respect to pipe 30211 in the sleeve.Therefore, friction wheel 302 provides first friction force corresponding to the first damping moment of torsion to second file, makes second file to be fed, and simultaneously, first file is fed and moves toward first direction.
And enter in the automatic paper feeder and when paperboard takes place when first file is fed, must be with first file by taking out in the automatic paper feeder, so the past second direction in contrast to first direction of first file is moved.When first file moves toward second direction, friction wheel 302 changes because of friction pad 3023 contacts with second file toward the rotation of second hand of rotation, first sleeve 3021 also rotates toward second hand of rotation, the first spring portion 30241 is fixed on the sleeve outer tube 30221, and the second spring portion 30242 is fixed in manages on 30211 in the sleeve, and second sleeve 3022 is rotated along with the rotation of first sleeve 3021, and free-wheel clutch 3025 produces the second damping moment of torsion with respect to wheel shaft 3026 rotations; Wherein the first damping moment of torsion is greater than the second damping moment of torsion.Because free-wheel clutch 3025 can rotate smoothly with respect to wheel shaft 3026, so the magnitude of interference of 3026 on free-wheel clutch 3025 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 second file when second direction is moved, can be subjected to drag effects hardly and can be removed smoothly.According to as can be known above-mentioned, the inner coil spring that is provided with of friction wheel disclosed by the invention has first bigger spring portion of internal diameter and the second less spring portion of internal diameter, therefore when coil spring is reversed, the different magnitudes of interference that produce according to the first spring portion and the second spring portion and can obtain the first damping moment of torsion and the second damping moments of torsion of different sizes, and the first damping moment of torsion is greater than the second damping moment of torsion.Pass through said structure, friction wheel can produce the damping moment of torsion of two kinds of directions, and the varying in size of this two kinds of damping moments of torsion, in the time of can making the automatic paper feeder paperboard, need not open the loam cake of automatic paper feeder, and can be directly with file by moving and take out file toward moving back the paper direction in the automatic paper feeder.
The above only is preferred embodiment of the present invention; be not in order to limit the protection domain of claim of the present invention; therefore all other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be contained in the protection domain of claim of the present invention.
Claims (22)
1. a friction wheel is applied to an automatic paper feeder, and so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, and this friction wheel comprises:
One sleeve has a sleeve lining;
One friction pad is surrounded on this sleeve, in order to contact with this second file;
One coil spring, be arranged in this sleeve, this coil spring has one first spring portion and one second spring portion, and this first spring portion has one first spring inside diameter, this second spring portion has one second spring inside diameter less than this first spring inside diameter, and this first spring portion contacts with this sleeve lining; And
One wheel shaft passes this coil spring and contacts with this second spring portion; Wherein when this second file moves toward a first direction, this sleeve rotates toward one first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this sleeve lining, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward the second direction in contrast to this first direction, this sleeve rotates toward one second hand of rotation, this second spring portion is fixed on this wheel shaft, and this first spring portion is reversed and produces one second damping moment of torsion; Wherein this first damping moment of torsion is greater than this second damping moment of torsion.
2. friction wheel as claimed in claim 1, wherein one first inner wall part of this sleeve lining has one first sleeve diameter, and this first inner wall part approaches an end of this sleeve, and one second inner wall part of this sleeve lining has one second sleeve diameter, and this second inner wall part approaches an other end of this sleeve; Wherein this first sleeve diameter is less than this second sleeve diameter.
3. friction wheel as claimed in claim 2, wherein this sleeve lining is a tilt internal wall.
4. friction wheel as claimed in claim 2, wherein this first spring portion contacts with this first inner wall part, this second spring portion does not contact and contacts with this wheel shaft with this second inner wall part, when this sleeve rotates toward this first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this first inner wall part, and the second spring portion is reversed and is produced this first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward this second direction, this sleeve rotates toward one second hand of rotation, and this second spring portion is fixed by this wheel shaft, and this first spring portion is reversed and produces this second damping moment of torsion.
5. friction wheel as claimed in claim 1, wherein this first spring portion off-centre is connected in this second spring portion.
6. friction wheel as claimed in claim 1 is characterized in that also comprising that one holds axle, stretches into this end of this sleeve, is used to hold when this wheel shaft stretches into this other end of this sleeve this wheel shaft.
7. a friction wheel is applied to an automatic paper feeder, and so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, 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 an end in contact of pipe;
One friction pad is surrounded on this first sleeve, in order to contact with this second file;
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 on to manage in this sleeve and upward forms 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 when this second file moves toward a first direction, this first sleeve rotates toward this first hand of rotation, this second sleeve is limited by this free-wheel clutch and can't rotates, this first spring portion is fixed on this sleeve outer tube, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to pipe in this sleeve; When this second file moves toward the second direction in contrast to this first direction, this first sleeve rotates toward one second hand of rotation, this first spring portion is fixed on this sleeve outer tube, and this second spring portion is fixed on the interior pipe of this sleeve, and this second sleeve is rotated along with the rotation of this first 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.
8. friction wheel as claimed in claim 7, 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 pipe in this second spring portion and this sleeve less than the caliber of this sleeve outer tube in this sleeve.
9. a friction wheel module of using friction wheel is applied to an automatic paper feeder, and so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, and this friction wheel module comprises:
One friction wheel support;
One friction wheel is set on this friction wheel support, and this friction wheel comprises:
One sleeve has a sleeve lining;
One friction pad is surrounded on this sleeve, in order to contact with this second file;
One coil spring, be arranged in this sleeve, this coil spring has one first spring portion and one second spring portion, and this first spring portion has one first spring inside diameter, this second spring portion has one second spring inside diameter less than this first spring inside diameter, and this first spring portion contacts with this sleeve lining; And
One wheel shaft passes this coil spring and contacts with this second spring portion; Wherein when this second file moves toward a first direction, this sleeve rotates toward one first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this sleeve lining, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward the second direction in contrast to this first direction, this sleeve rotates toward one second hand of rotation, this second spring portion is fixed on this wheel shaft, and this first spring portion is reversed and produces one second damping moment of torsion; Wherein this first damping moment of torsion is greater than this second damping moment of torsion; And
One elastic element is arranged on this friction wheel support, and contacts with this friction wheel, to this friction wheel this friction wheel is moved up and down in order to an elastic force to be provided with respect to this friction wheel support.
10. friction wheel module as claimed in claim 9, wherein one first inner wall part of this sleeve lining has one first sleeve diameter, and this first inner wall part approaches an end of this sleeve, and one second inner wall part of this sleeve lining has one second sleeve diameter, and this second inner wall part approaches an other end of this sleeve; Wherein this first sleeve diameter is less than this second sleeve diameter.
11. friction wheel module as claimed in claim 10, wherein this sleeve lining is a tilt internal wall.
12. friction wheel module as claimed in claim 10, wherein this first spring portion contacts with this first inner wall part, this second spring portion does not contact and contacts with this wheel shaft with this second inner wall part, when this sleeve rotates toward this first hand of rotation, this first spring portion is reversed toward this first hand of rotation and is expanded this first spring inside diameter of this first spring portion, this first spring portion is fixed by this first inner wall part, and the second spring portion is reversed and is produced this first damping moment of torsion with respect to this wheel shaft; After this first spring inside diameter expansion of this first spring portion, and when this second file moves toward this second direction, this sleeve rotates toward one second hand of rotation, and this second spring portion is fixed by this wheel shaft, and this first spring portion is reversed and produces this second damping moment of torsion.
13. friction wheel module as claimed in claim 9, wherein this first spring portion off-centre is connected in this second spring portion.
14. friction wheel module as claimed in claim 9 is characterized in that also comprising that one holds axle, stretches into this end of this sleeve, is used to hold when this wheel shaft stretches into this other end of this sleeve this wheel shaft.
15. friction wheel module as claimed in claim 9, wherein this elastic element also comprises a torsion spring arm, in order to contact with this friction wheel and to provide this elastic force to this wheel shaft, this friction wheel is moved up and down with respect to this friction wheel support.
16. friction wheel module as claimed in claim 15, wherein this elastic element is a support torsion spring.
17. friction wheel module as claimed in claim 9, wherein this wheel shaft also comprises a restriction edge, in order to be fixed in this friction wheel support, this wheel shaft is fixed and can't rotates.
18. a friction wheel module of using friction wheel is applied to an automatic paper feeder, so that the friction force that is used for separating one first file and one second file to be provided, wherein this second file is positioned at this first file top, and this friction wheel module comprises:
One friction wheel support;
One friction wheel is set on this friction wheel support, 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 an end in contact of pipe;
One friction pad is surrounded on this first sleeve, in order to contact with this second file;
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 on to manage in this sleeve and upward forms 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 when this second file moves toward a first direction, this first sleeve rotates toward this first hand of rotation, this second sleeve is limited by this free-wheel clutch and can't rotates, this first spring portion is fixed on this sleeve outer tube, and the second spring portion is reversed and is produced one first damping moment of torsion with respect to pipe in this sleeve; When this second file moves toward the second direction in contrast to this first direction, this first sleeve rotates toward one second hand of rotation, this first spring portion is fixed on this sleeve outer tube, and this second spring portion is fixed on the interior pipe of this sleeve, and this second sleeve is rotated along with the rotation of this first 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; And
One elastic element is arranged on this friction wheel support, and contacts with this friction wheel, to this friction wheel this friction wheel is moved up and down in order to an elastic force to be provided with respect to this friction wheel support.
19. friction wheel module as claimed in claim 18, 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 pipe in this second spring portion and this sleeve less than the caliber of this sleeve outer tube in this sleeve.
20. friction wheel module as claimed in claim 18, wherein this wheel shaft also comprises a restriction edge, in order to be fixed in this friction wheel support, this wheel shaft is fixed and can't rotates.
21. friction wheel module as claimed in claim 18, wherein this elastic element also comprises a torsion spring arm, in order to contact with this friction wheel and to provide this elastic force to this wheel shaft, this friction wheel is moved up and down with respect to this friction wheel support.
22. friction wheel module as claimed in claim 21, wherein this elastic element is a support torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010002507 CN102120532B (en) | 2010-01-08 | 2010-01-08 | Friction wheel and friction wheel module using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010002507 CN102120532B (en) | 2010-01-08 | 2010-01-08 | Friction wheel and friction wheel module using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102120532A true CN102120532A (en) | 2011-07-13 |
| CN102120532B CN102120532B (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010002507 Expired - Fee Related CN102120532B (en) | 2010-01-08 | 2010-01-08 | Friction wheel and friction wheel module using same |
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| Country | Link |
|---|---|
| CN (1) | CN102120532B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765617A (en) * | 2012-08-20 | 2012-11-07 | 天津光电通信技术有限公司 | Paper feeding pressure guiding roller for paper conveying system on lateral surface of office facility |
| CN102862839A (en) * | 2012-10-24 | 2013-01-09 | 天津光电通信技术有限公司 | Side paper feed system for office equipment |
| CN104097962A (en) * | 2013-04-15 | 2014-10-15 | 富士施乐株式会社 | Sheet feeding device and image forming apparatus |
| CN104973435A (en) * | 2014-04-08 | 2015-10-14 | 虹光精密工业股份有限公司 | Intermittent paper feeding mechanism |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926286A (en) * | 1973-02-05 | 1975-12-16 | Reell Precision Mfg | Spring grip clutch |
| JP2607956B2 (en) * | 1989-06-08 | 1997-05-07 | キヤノン株式会社 | Driving force transmission mechanism |
| JP2803933B2 (en) * | 1991-12-05 | 1998-09-24 | 三田工業株式会社 | Spring clutch structure |
| CN1313337C (en) * | 2002-02-04 | 2007-05-02 | 尼司卡股份有限公司 | Paper sheet conveying & feeding apparatus and automatic coveying & feeding manuscript device with the same apparatus |
| JP2003269492A (en) * | 2002-03-13 | 2003-09-25 | Ntn Corp | Roller clutch unit and paper feeding device using it |
| JP4246086B2 (en) * | 2004-02-19 | 2009-04-02 | シャープ株式会社 | Spring clutch device |
| JP2008274979A (en) * | 2007-04-25 | 2008-11-13 | Suncall Corp | Torque limiter |
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2010
- 2010-01-08 CN CN 201010002507 patent/CN102120532B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765617A (en) * | 2012-08-20 | 2012-11-07 | 天津光电通信技术有限公司 | Paper feeding pressure guiding roller for paper conveying system on lateral surface of office facility |
| CN102862839A (en) * | 2012-10-24 | 2013-01-09 | 天津光电通信技术有限公司 | Side paper feed system for office equipment |
| CN104097962A (en) * | 2013-04-15 | 2014-10-15 | 富士施乐株式会社 | Sheet feeding device and image forming apparatus |
| CN104973435A (en) * | 2014-04-08 | 2015-10-14 | 虹光精密工业股份有限公司 | Intermittent paper feeding mechanism |
| CN104973435B (en) * | 2014-04-08 | 2017-06-13 | 虹光精密工业股份有限公司 | Intermittent paper feeding mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102120532B (en) | 2013-07-10 |
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