CN1344101A - Paper distribution guide for automatic paper feeder - Google Patents
Paper distribution guide for automatic paper feeder Download PDFInfo
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- CN1344101A CN1344101A CN 00128641 CN00128641A CN1344101A CN 1344101 A CN1344101 A CN 1344101A CN 00128641 CN00128641 CN 00128641 CN 00128641 A CN00128641 A CN 00128641A CN 1344101 A CN1344101 A CN 1344101A
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- paper
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- document feeder
- automatic document
- distribution guide
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Abstract
A paper guide for automatic paper feeder is an elastic body with a vertical plate for directly or indirectly resisting against the front edge of paper and an arc surface as a transmission surface between the said vertical plate and its main plane. It also has a paper-guiding inclined plane for guiding paper into paper feeding rollers and the early quaue. It can prevent multi-power feeding and paper jam.
Description
The present invention relates to a kind of paper distribution guide, particularly relate to the paper distribution guide of a kind of use at automatic document feeder.
General described paper distribution guide can be applicable to the automatic document feeder on facsimile machine, scanner or the copying machines.Please refer to Fig. 1, it is the existing side view cutaway drawing of going up automatic document feeder.As shown in Figure 1, separation wheel 102 (roller) treat that in order to drive paper feeding 100 moves forward.There is an elastic element 108 below of separation friction pad (pad) 106, and it has elasticity combination, and separation wheel 102 closely contact with treating paper feeding 100, and cooperates separation to take turns 102 transmission to treat paper feeding 100.Paper feeding platform 110 is the inclined-planes that dip down, and treats paper feeding 100 in order to location and placement.
When treating that paper feeding 100 is placed on the paper feeding platform 110, treat that paper feeding 100 is subjected to action of gravity or via the transmission of paper pushing roller group (pick roller) (not being shown among the figure), makes and treat that paper feeding 100 enters positioning states along the surface of paper feeding platform 110 to lower slider.Generally speaking, separation wheel 102 and the coefficient of friction for the treatment of 100 of paper feedings can be greater than the coefficient of frictions for the treatment of between the paper feeding 100 itself, and separation takes turns 102 and treat that the coefficient of friction of 100 of paper feedings can be greater than the coefficient of friction for the treatment of 106 of paper feeding 100 and separation friction pads.Suppose μ
1For separation wheel 102 and treat the coefficient of friction of 100 of paper feedings, μ
2For treating the coefficient of friction of 100 of paper feedings, μ
3For treating the coefficient of friction between paper feeding 100 and the separation friction pad 106, wherein μ
1＞μ
3＞μ
2
When separation wheel 102 be that the center of circle is when beginning to rotate, because the coefficientoffriction between the 102 and first paper 100a is taken turns in separation with wheel shaft 104
1Treat coefficientoffriction between paper feeding 100b greater than the first paper 100a and other
2, the frictional force that is produced between separation the wheel 102 and first paper 100a can drive the first paper 100a smoothly and move forward; Then, the first paper 100a break away from its below other treat paper feeding 100b and contact with separation friction pad 106 because the coefficientoffriction between the 102 and first paper 100a is taken turns in separation
1Greater than the coefficientoffriction between the first paper 100a and the separation friction pad 106
3, the first paper 100a is continued along with separation wheel 102 continues to move forward, and successfully sends first paper.Yet use existing automatic document feeder, often multiple paper feeding phenomenon takes place in the misarrangement because of paper.
Please refer to Fig. 2, it is a kind of schematic diagram that multiple paper feeding phenomenon may take place among Fig. 1.As shown in Figure 2, treat the proper alignment in regular turn of paper feeding 100 in failing as Fig. 1 and fail separation when taking turns 102 when treating paper feeding 200, because of paper 200a and other treat that the coefficient of friction between the paper feeding 200b is littler than the coefficient of friction between general paper, so after allowing paper 200a and other treat that paper feeding 200b separates, be admitted to together between separation wheel 102 and the separation friction pad 106.Because 108 of elastic elements receive and squeeze and to lower compression, several first paper 200a are moved forward together and produce multiple paper feeding phenomenon.The situation of other paper misarrangements, the position that paper is transmitted than the back in the position of for example transmitting paper in advance is leading, or paper sheet thickness all multiple paper feeding or paper jam phenomenon may take place as too thick or too thin improperly.
The object of the present invention is to provide a kind of paper distribution guide that is used on the automatic document feeder, it reduces the phenomenon because of the multiple paper feeding that change in friction force caused between paper, avoids simultaneously because of the misarrangement of paper multiple paper feeding or paper jam phenomenon taking place.
The object of the present invention is achieved like this, and a kind of paper distribution guide that is used for automatic document feeder promptly is provided, and wherein this automatic document feeder has separation wheel, moves forward in order to drive paper; This paper distribution guide comprises: a main body plane has several fillets; One vertical plane, vertical with this main body plane, in order to directly or indirectly to prop up paper front edge; And an arc surface, between this vertical plane and this main body plane, be the connection turnover face on this vertical plane and this main body plane.
The present invention also provides a kind of automatic document feeder, comprising: a paper feeding platform is the inclined-plane that dips down, and treats that in order to placement paper feeding opens and located; One separation wheel, one first paper that is placed in this paper feeding platform in order to drive moves forward; One paper distribution guide is an elastomer, when this first paper during with the drive of this separation wheel, in order to stop moving of one second paper and rear paper thereof; And a separation friction pad, its below collocation one elastic element when this first paper is sent between this separation wheel and this separation friction pad, by the elasticity of elastic element, makes first paper closely contact with this separation wheel.
The These characteristics according to the present invention, the paper distribution guide that is provided, it is an elastomer, have arc surface and vertical plane, this paper distribution guide comprises that also first leads paper inclined-plane and one second and lead the paper inclined-plane, wherein first lead paper inclined-plane and second and lead the paper inclined-plane and be connected with the main body plane respectively, in order to guiding paper exchange premium separation wheel and the preliminary paper of arranging with the same tilt degree.
Below in conjunction with accompanying drawing, describe embodiments of the invention in detail, wherein:
Fig. 1 is the side view cutaway drawing of existing automatic document feeder;
Fig. 2 is the schematic diagram that multiple paper feeding phenomenon takes place among Fig. 1;
Fig. 3 is a kind of side cutaway view that utilizes the automatic document feeder of paper distribution guide of the present invention;
Fig. 4 is the three-dimensional structure diagram of a kind of paper distribution guide of a preferred embodiment of the present invention;
Fig. 5 A and Fig. 5 B are the arc surface radius of curvature of paper distribution guide and the graph of a relation of paper sheet thickness;
Fig. 6 A is the schematic diagram of paper distribution guide phase I separation among Fig. 3;
Fig. 6 B is the schematic diagram of paper distribution guide second stage separation among Fig. 3.
Please refer to Fig. 3, what it illustrated is a kind of side cutaway view that utilizes the automatic document feeder of paper distribution guide of the present invention.As shown in Figure 3, automatic document feeder includes separation wheel (roller) 302, separation friction pad (pad) 306, elastic element 308, paper feeding platform 310, paper guide rail 312 and paper distribution guide 314.Separation wheel 302 links to each other indirectly with motor (not being shown among the figure), makes separation take turns 302 generations via the rotation of motor and rotates.When treating that paper feeding 300 is placed on the paper feeding platform 310, because paper feeding platform 310 is the inclined-plane that dips down, treat that paper feeding 300 is subjected to action of gravity or via the transmission of paper pushing roller group (pick roller) (not being shown among the figure), make treat paper feeding 300 along the surface of paper feeding platform 310 to lower slider, up to treating that paper feeding 300 leading edges touch paper distribution guide 314 and enter positioning states.Wherein paper distribution guide 314 is with so that treat paper feeding 300 proper alignment in regular turn, and guiding paper exchange premium separation wheel 302, and a great resistance is provided simultaneously, prevent second and second later treat the mobile of paper feeding 300.The combination of separation wheel 302, separation friction pad (pad) 306, elastic element 308 is to move forward in order to drive paper.Paper guide rail (paper guide) the 312nd, the transmission direction of guiding paper.
Please refer to Fig. 4, what it illustrated is the three-dimensional structure diagram that is used in a kind of paper distribution guide on the automatic document feeder among Fig. 3.Paper distribution guide 40 is an elastomer, and its characteristics are for having arc surface 404, vertical plane 406.Paper distribution guide 40 comprises that also first leads paper inclined-plane 402a, second and lead paper inclined-plane 402b and main body plane 408.Main body plane 408 has several fillets, is connected with arc surface 404, first at least and leads paper inclined-plane 402a and second and lead paper inclined-plane 402b.First leads paper inclined-plane 402a, second leads paper inclined-plane 402b and is connected with main body plane 408 respectively with the same tilt degree.Arc surface 404 between vertical plane 406 and main body plane 408, the connection on vertical plane 406 and main body plane 408 turnover face, wherein vertical plane 406 is vertical with main body plane 408.
Please refer to Fig. 5 A and Fig. 5 B, the arc surface radius of curvature of the paper distribution guide that it illustrated and the graph of a relation of paper sheet thickness.Suppose that the arc surface radius of curvature is R, paper sheet thickness is T, and the preferred range of paper sheet thickness can be between 0.25R and 0.5R, and its design still must be looked the centripetal force actual state of the elasticity of antiquarian, paper distribution guide and paper pushing roller group and adjust to some extent.Paper sheet thickness T shown in Fig. 5 top
1Greater than 0.5R, take place easily this moment because the frictional force that 502 pairs of ground paper of separation wheel are opened 500a is opened the positive force component that is parallel to frictional force that 500a applies less than arc surface 404 to ground paper, forcing ground paper to open 500a can't take turns 502 rotation and advance along with separation, thereby the situation of paperboard takes place.Shown in Fig. 5 below, the thickness that two thin papers are opened 500b is less than 0.5R, i.e. paper sheet thickness T
2Less than 0.25R, this moment, second thin paper opened the positive force component that is parallel to frictional force that frictional force that suffered its first thin paper in below opens applies less than arc surface 404, second thin paper opened also along with first thin paper Zhang Yidong, opened 500b and cause multiple paper feeding phenomenon so separation wheel 502 can be sent into two thin papers.
Please refer to Fig. 6 A, what it illustrated is the schematic diagram of paper distribution guide phase I separation among Fig. 3.As shown in Figure 6A, lead paper inclined-plane 602 in order to guiding paper exchange premium separation wheel and the preliminary paper of arranging.When separation wheel 302 is that the center of circle is when beginning to rotate with wheel shaft 304, and paper sheet thickness approximately less than arc surface 404 (please refer to Fig. 5) radius of curvature 1/2nd and approximately greater than four/for the moment (0.25R＜T＜0.5R) of arc surface 404 radius of curvature, the first paper 600a is along the rotation of separation wheel 302, pressed down and arranged paper distribution guide 314, and transmitted the first paper 600a by the first paper 600a and 302 frictional force that produced of separation wheel; Simultaneously, vertical plane 604 can prop up the leading edge for the treatment of paper feeding 300, second and second later paper feeding 300 for the treatment of is led on the paper inclined-plane 602 because of the resistance that directly or indirectly is subjected to vertical plane 604 places, and successfully sent the first paper 600a.
In the separation of the phase I of paper distribution guide 40, be by leading paper inclined-plane 602 guiding paper exchange premium separations wheel and the preliminary paper of arranging, and directly or indirectly stop second and later treat paper feeding 300 by vertical plane 604.If paper fails to finish separation in the phase I, second stage separation operation still can make paper arrange in regular turn.Please refer to Fig. 6 B, what it illustrated is the schematic diagram of paper distribution guide second stage separation among Fig. 3.The second paper 600b is involved in accidentally because of crossing thin or failing to be hampered by vertical plane 604, because paper distribution guide 314 provides a power of pressing close to the separation wheel, after the second paper 600b is involved in first paper, the positive earlier contact separation of its paper front edge friction pad 306, separation this moment friction pad 306 and its below elastic element 308 rubber-likes combination, make separation wheel 302 closely contact with the first paper 600a, thereby when second paper 600b contact separation friction pad 306, the coefficient of friction that the second paper 600a and separation friction pad are 306 can greater than and the first paper 600a between coefficient of friction, make the second paper 600b be hampered by separation friction pad 306, after the first paper 600a sends, just then enter between separation wheel 302 and the separation friction pad 306, thereby reach second stage separation operation.
The disclosed a kind of paper distribution guide that is used on the automatic document feeder of the above embodiment of the present invention, it leads the paper inclined-plane can guide paper exchange premium separation wheel and the preliminary paper of arranging, and avoids the multiple paper feeding or the paper jam phenomenon that are caused because of the paper misarrangement.Have elastic construction by two stage separation operation and paper distribution guide, make the vertical plane of paper distribution guide directly or indirectly stop second and later treat paper feeding, can reduce phenomenon because of the multiple paper feeding that change in friction force caused between paper.Therefore only need use paper distribution guide, just can solve the multiple paper feeding problem that the automatic document feeder regular meeting on facsimile machine, scanner or copying machines takes place with simple structure.
Though disclosed the present invention in conjunction with an above preferred embodiment; yet it is not in order to limit the present invention; any those skilled in the art can be used for a variety of modifications and variations not breaking away from the spirit and scope of the present invention, so protection scope of the present invention should be with being as the criterion that the claim scope is defined.
Claims (18)
1. paper distribution guide that is used for automatic document feeder, wherein this automatic document feeder has separation wheel, moves forward in order to drive paper; This paper distribution guide comprises:
One main body plane has several fillets;
One vertical plane, vertical with this main body plane, in order to directly or indirectly to prop up paper front edge; And
One arc surface between this vertical plane and this main body plane, is the connection turnover face on this vertical plane and this main body plane.
2. paper distribution guide as claimed in claim 1, wherein this paper distribution guide is an elastomer.
3. paper distribution guide as claimed in claim 2, wherein this paper distribution guide comprises that also one first leads paper inclined-plane and one second and leads the paper inclined-plane, wherein this first is led paper inclined-plane and this second and leads the paper inclined-plane and be connected with this main body plane respectively with the same tilt degree, in order to this separation wheel of guiding paper exchange premium and the preliminary paper of arranging.
4. paper distribution guide as claimed in claim 2, wherein paper sheet thickness less than the radius of curvature of this arc surface 1/2nd and greater than 1/4th of the radius of curvature of this arc surface.
5. paper distribution guide as claimed in claim 3, wherein this automatic paper separating device also comprises a separation friction pad, the combination of its below collocation one elastic element makes this separation wheel closely contact with paper.
6. paper distribution guide as claimed in claim 5, wherein this automatic document feeder is used in a facsimile machine.
7. paper distribution guide as claimed in claim 5, wherein this automatic document feeder is used in the one scan device.
8. paper distribution guide as claimed in claim 5, wherein this automatic document feeder is used for a copying machines.
9. automatic document feeder comprises:
One paper feeding platform is the inclined-plane that dips down, and treats that in order to placement paper feeding opens and located;
One separation wheel, one first paper that is placed in this paper feeding platform in order to drive moves forward;
One paper distribution guide is an elastomer, when this first paper during with the drive of this separation wheel, in order to stop moving of one second paper and rear paper thereof; And
One separation friction pad, its below collocation one elastic element when this first paper is sent between this separation wheel and this separation friction pad, by the elasticity of elastic element, makes first paper closely contact with this separation wheel.
10. automatic document feeder as claimed in claim 9, wherein this paper distribution guide also comprises a main body plane, has several fillets.
11. automatic document feeder as claimed in claim 10, wherein this paper distribution guide also comprises a vertical plane, and is vertical with this main body plane, in order to directly or indirectly to prop up paper front edge.
12. automatic document feeder as claimed in claim 11, wherein this paper distribution guide also comprises an arc surface, between this vertical plane and this main body plane, is the connection turnover face on this vertical plane and this main body plane.
13. automatic document feeder as claimed in claim 12, wherein this paper distribution guide comprises that also one first leads paper inclined-plane and one second and leads the paper inclined-plane, wherein this first is led paper inclined-plane and this second and leads the paper inclined-plane and be connected with this main body plane respectively with the same tilt degree, in order to this separation wheel of guiding paper exchange premium and the preliminary paper of arranging.
14. automatic document feeder as claimed in claim 13, wherein paper sheet thickness less than the radius of curvature of this arc surface 1/2nd and greater than 1/4th of the radius of curvature of this arc surface.
15. automatic document feeder as claimed in claim 14, wherein this automatic document feeder also comprises a paper guide rail, in order to the transmission direction of guiding paper.
16. automatic document feeder as claimed in claim 15, wherein this automatic document feeder is used for a facsimile machine.
17. automatic document feeder as claimed in claim 15, wherein this automatic document feeder is used for the one scan device.
18. automatic document feeder as claimed in claim 15, wherein this automatic document feeder is used for a copying machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001286412A CN1151656C (en) | 2000-09-18 | 2000-09-18 | Paper distribution guide for automatic paper feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001286412A CN1151656C (en) | 2000-09-18 | 2000-09-18 | Paper distribution guide for automatic paper feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1344101A true CN1344101A (en) | 2002-04-10 |
| CN1151656C CN1151656C (en) | 2004-05-26 |
Family
ID=4593174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001286412A Expired - Fee Related CN1151656C (en) | 2000-09-18 | 2000-09-18 | Paper distribution guide for automatic paper feeder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151656C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635778B (en) * | 2008-07-25 | 2011-05-25 | 致伸科技股份有限公司 | Sheetfed scanner with business card feed mechanism |
| CN102408023A (en) * | 2011-06-10 | 2012-04-11 | 刘安成 | Paper separation incline |
| CN112520475A (en) * | 2020-12-08 | 2021-03-19 | 厦门汉印电子技术有限公司 | Paper feeding mechanism and paper document processing equipment with same |
-
2000
- 2000-09-18 CN CNB001286412A patent/CN1151656C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635778B (en) * | 2008-07-25 | 2011-05-25 | 致伸科技股份有限公司 | Sheetfed scanner with business card feed mechanism |
| CN102408023A (en) * | 2011-06-10 | 2012-04-11 | 刘安成 | Paper separation incline |
| CN112520475A (en) * | 2020-12-08 | 2021-03-19 | 厦门汉印电子技术有限公司 | Paper feeding mechanism and paper document processing equipment with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151656C (en) | 2004-05-26 |
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Granted publication date: 20040526 Termination date: 20110918 |