TW561779B - Paper guide using automatic paper-feeding device - Google Patents

Abstract

A paper guide using automatic paper-feeding device is disclosed. The paper guide is an elastic body, which is characterized in having a vertical plane and a circular plane. The vertical plane is to abut against the front edge of the paper directly or indirectly, the circular plane is the connection/intersection surface of the vertical plane and the main-body plane. The paper guide further comprises the tilted plane of paper guide, so as to guide the paper to be pasted onto the roller and to arrange papers initially.

Description

561779 V. Description of the invention (1) Field of the invention The present invention relates to a paper separation guide, and more particularly to a paper separation guide used in an automatic paper feeding device, which can be applied to facsimile machines and scanners. Or the automatic paper feeding device on the photocopier. [Background of the Invention] Please refer to FIG. 1, which illustrates a side cross-sectional view of a conventional automatic paper feeding device. As shown in Fig. I, the separation roller 102 is used to move the paper 100 to be forwarded. Under the paper separation friction pad (pad) 106, there is an elastic element 108, which has an elastic combination to make the paper separation wheel 100 and the paper 100 to be closely contacted, and cooperate with the paper separation wheel 丨 02 to convey the paper to be fed丨 〇〇. The feeding table U 0 is a downwardly inclined surface for positioning and placing the paper to be fed. When the paper to be fed 100 is placed on the paper feeding table 丨 丨 0, the paper to be fed 100 is subjected to gravity or is conveyed through a pick roller (not shown in the figure), so that the paper to be fed is fed.丨 〇〇 Slide down along the surface of the paper table 丨 丨 into the positioning state. In general, the coefficient of friction between the separation wheel 100 and the paper to be fed 100 will be greater than the coefficient of friction between the paper to be fed 100 and the friction between the separation wheel 102 and the paper 100 to be fed The coefficient will be greater than the friction coefficient between the paper to be fed and the separation friction pad 106. Suppose a is the coefficient of friction between the separation wheel 100 and the paper to be fed 100, ... is the coefficient of friction between the paper to be fed 100, and # is the coefficient of friction between the paper to be fed 100 and the separation friction pad 106, # 3〉… # 3〉 " 2. ′, 1 When the separation wheel 102 starts to rotate with the wheel shaft 104 as the center, the friction coefficient between the separation wheel 102 and the first paper 100a is larger than the first paper i〇〇a

561779

The coefficient of friction with other paper to be fed i00b, the friction generated between the separation wheel 1002 and the first paper 100a can smoothly drive the first paper forward 丨 00a = then, The first paper 100a is separated from the other paper to be fed i00b below it and the "separation friction pad 106 is in contact. Since the separation roller 100 and the first paper 100 and the friction coefficient A are larger than the first paper The rubbing and counting between 100a and the separation friction pad 106 enables the first paper 100a to continue to move forward with the separation wheel 1002, and successfully sends out the first paper. However, Using the traditional t automatic paper feeding device, multiple paper feeding phenomenon often occurs due to improper arrangement of paper. 0 Please refer to Figure 2, which shows an unintended possibility of multiple ^^ phenomenon in Figure P. As shown in Figure 2 As shown in the figure, when the to-be-fed paper 200 cannot be arranged in order as the first to-be-fed paper 100 and is not close to the separation wheel 102, == between 200a and other to-be-fed paper 200b The coefficient of friction is smaller than that of ordinary paper =, so the paper 200a is separated from other papers to be fed 200b, and is fed into the separation wheel 102 and the separation paper. Between the friction pads 10.6. As the elastic parts 108 are indirectly squeezed out and compressed downward, the first papers of several sheets are moved forward together to produce multiple paper feeding. Other papers are arranged in the same order, such as It is the position where the paper is conveyed first than the position where the paper is conveyed later 2 :: Improper paper thickness-too thick or too thin, multiple paper transport or paper jam may occur. [Objective and Summary of the Invention] In view of this, the present invention The purpose is to provide a paper separation guide for automatic t placement, which reduces the 561779 caused by the change in friction between papers. 5. Description of the invention (3) 同时 ίΐΐί. At the same time to avoid multiple paper due to improper arrangement of paper Paper feeding or paper jam phenomenon. 7 Zhisheng Paper ::, proposes a vertical surface used in automatic paper feeding device and: the arc device is an impulse ', which is characterized by: surface and arc surface. "中The vertical plane is perpendicular to the plane of the main body or indirectly abuts against the front and the edge of the paper. The arc connects the turning planes. According to the purpose of the present invention, a paper guide for automatic two-feeding is proposed.丨 The device is an elastic body with two circles ::: vertical plane. The paper separation guide further includes a first guide and an inclined plane, wherein the first paper guide slope and the second paper guide slope are respectively connected to the main body plane to guide. Paper feed ;; Arrange the paper in steps. The purpose of the book cutter blade paper wheel and the first invention 'Propose another kind of automatic package :: wheel, paper separation friction card, paper feeding table and paper separation guide. &Quot; 分 ΞΠΠΓ: The paper moves forward. The combination of the bottom of the separation friction pad-a combination of elastic elements' 胄 The separation roller and the paper closely drive = move. The paper feeding table is a downwardly inclined surface, and two sets = paper. The device is an elastic body ... providing a great resistance to stop the movement of the second and subsequent sheets of paper. In order to make the above objects, features, and advantages of the present invention more obvious and understandable, a preferred embodiment is given below, and In accordance with the attached drawings, detailed descriptions are as follows:

561779 V. Description of the invention (4) [Simplified description of the drawing] The first drawing is not a side sectional view of a conventional automatic paper feeding device. Figure 2 is not a schematic diagram of the multiple paper feeding phenomenon in Figure 1. Fig. 3 is a side sectional view of an automatic paper feeding device using a paper separation guide of the present invention. Fig. 4 is a perspective structural view of a paper separating guide according to a preferred embodiment of the present invention. Figure 5 shows the relationship between the radius of curvature of the arc surface of the paper separation guide and the thickness of the paper. Fig. 6A shows the intention of separating paper in the first stage of the separation guide in Fig. 3. Fig. 6B shows the intention of separating paper in the second stage of the separation guide in Fig. 3. Description of drawing numbers] 600b 2 00a 100b 102, 104, 106 ^ 108 > 1 0 0, 2 0 0, 3 0 0; paper to be fed 100a, 60 0a: first paper: second paper: paper, 200b: Other papers to be fed 302, 502: separation wheel 3 0 4 · wheel shaft 3 0 6: separation friction pad 3 0 8 · elastic element

561779 V. Description of the invention (5) 1 1 0, 3 1 0: paper feeding table 3 1 2: paper guide 40: paper separation guide 402a, 402b, 602: paper guide inclined surface 4 0 4: arc surface 406 , 604: vertical plane 4 0 8 main plane 5 0 a: thick paper 5 0 0 b: thin paper

[Preferred embodiment]. (3) Referring to FIG. 3, a side sectional view of an automatic paper feeding device using the paper separation guide of the present invention is shown. As shown in Figure 3, the automatic ^ paper loading Λ includes a separation wheel U0ller) 3G2, a separation friction 塾 (―) ^ 1314 1 pieces 308, a paper feeding table 310, a paper guide 312, and a separation guide It is indirectly connected to the motor (not shown in the figure) via the wheel 3G2, and the paper separation wheel 302 is rotated by turning at 31 η. When the paper 300 to be fed is placed on the paper 300, since the paper feeding table 310 is a downwardly inclined surface, it is ready to be fed (using or via the paper feeding roller set ㈦ roller)

Enter the positioning state. The paper 30 0 'edge contacts the paper separation guide 314 and is arranged in order. F ^ The paper guide 3 1 4 is used to make the paper to be fed 3 0 0 to stop the second and first 02. At the same time, provide one pole of the first sheet of paper to be sent after 3 0 0

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move. Paper separation wheel 30 2. The combination of paper separation friction pad (306) and elastic element (308) is used to drive the paper forward. The paper guide 3 1 2 guides the driving direction of the paper. Please refer to FIG. 4, which shows a three-dimensional structure diagram of a paper separation guide used in the automatic feeding device f in FIG. 3. The paper separation guide 40 is a two-elastic body, which is characterized by having an arc surface 40 4. The vertical / straight-^^ 7 ^ 7 paper twilight guide 40 further includes a first paper guide slope 402a and a second paper guide Ramp 40 and the main plane 408. The main body plane 408 has a plurality of connecting edges, at least connected to a curved surface 404, a first paper guide inclined surface 402a, and a second paper guide inclined ft4002. The first paper guide inclined surface 40 2a and the second paper guide inclined surface 402) are connected to the main body plane 408 at the same inclination, respectively. The arc surface 404 is located between the vertical surface 406 and the main body plane, and is a connection turning surface between the vertical surface 406 and the main body plane 408. The 1 ## straight surface 40 6 is perpendicular to the main body plane 408. Ding " Middle droop main /-Ϊ f As shown in Figure 5, it shows the curvature of the circular solitary surface of the paper guide ::: ί the relationship between the thicknesses. Assuming that the radius of curvature of the arc surface is R, and the paper thickness is τ ', the preferred range of paper thickness can be between 251 and 0, depending on the paper size, the elasticity of the separation guide, and the paper feed roller. The actual situation of progress and strength has been adjusted. Such as greater than. .5R 'is prone to occur at this time because the second line of paper is divided into two parts: small: the circular surface 404 applies the rotation of the flat wheel 502 of the thick paper 50 ° a and is straightened, forcing the thick paper 500a A paper jam cannot occur as shown in the separation, two Λ :. As shown in Figure 5, the thickness of less than 0.25R \ 〇〇b is less than 0.5R, that is, the thickness of the paper is 1. At this time, the second thin paper receives the first thin paper below it.

Page 9 561779 V. Description of the invention (7) = The friction force is less than the positive force parallel to the friction force imposed by the K⑲ face 404 ^ 7 Buy, so that the second thin paper also moves with the first thin paper, so The separation wheel 5 02 will feed two thin papers 5 0 0b and cause multiple feeding. Refer to FIG. 6A, which shows the schematic diagram of the first paper separation of the paper separation guide in FIG. 3. As shown in Fig. 6A, the paper guide slanted surface 602 is used for paper sticking into the separation roller and preliminary arrangement of paper. When the sub-axis and the center of the circle begin to rotate, the thickness is less than or equal to one-half of the radius of curvature of the second round (see Figure 5 for research) and greater than one-fourth of the radius of curvature of the arc surface 04 (025R When <τ &lt; 0.5, the first paper 60 〇a is rotated along the separation wheel 3 002 to obtain the pressure and side by side, the guide 314, and the first paper 6 003 The J friction force generated between the paper separation wheel 300 and the paper separation wheel 300 is used to convey the first paper 600a; at the same time, the vertical surface 604 can resist the edge of 300 °, so that the second and subsequent sheets The paper to be fed 3 0 0 is placed on the paper guide slant 60 2 directly or indirectly by the resistance of the vertical plane 604, and the first paper 6 0 3 is successfully sent. One-stage paper separation is guided by the paper guide inclined surface 602 into the paper separation roller and preliminary arrangement of the paper, and directly or indirectly block the second and subsequent paper to be fed 300 through the vertical surface. If the paper Soil: In the second and third component papers, the second stage of the separation operation can still make the paper 2. Please refer to Figure 6B, which shows the paper separation guide in Figure 3. Schematic diagram of stage paper separation. The second paper 600b is inadvertently rolled in because it is too thin or fails to block on the vertical plane 604. Because the paper separation guide 314 provides a force against the paper separation wheel, the paper Two papers 6001) After the first paper is rolled in, the leading edge of the bean paper first contacts the paper separation friction pad 3 () 6, and at this time the paper separation friction pad 306

Page 10 561779 V. Description of the invention (8) '----- The elastic combination of the elastic element 308 underneath makes the separation wheel 302 in close contact with the first paper 60 0a, so when the second paper 60 b When contacting the separation friction pad 3 06, the friction coefficient between the second paper 600a and the separation friction pad 3006 will be large = the friction coefficient with the first paper 600a, so that the second paper 600a Obstructed by the paper friction pad 306, after the first paper 600a is sent out, it then enters between the = wheel 3G2 and the paper separation friction pad 3G6, so the second stage of paper separation is achieved. [Inventive effect] Paper separation guide steps arrange paper, paper phenomenon. Through the structure, the phenomenon of paper to be fed after paper separation and guide is caused. In order to solve the problem of multiple paper feeding in a facsimile machine, it is not used to protect the spirit of the present invention. In the embodiment described above, the paper guide can avoid the verticality of the guide due to the two-stage separation of the paper, which can reduce the paper due to the need to use only, scanners or problems. Although the present invention limits the scope of the present invention, one of the types disclosed in the present invention is used on the slant surface of an automatic paper feeding device to guide paper to the multiple feeding or jam operations caused by improper alignment of the separation rollers and the separation guide. The flexible binding surface of the guiding device directly or indirectly blocks the second sheet and its multiple sheet feeding guides caused by the change in friction between sheets. The automatic paper feeding device on the photocopier often invented A preferred embodiment is disclosed as above, 4 = This artist does various modifications and retouching without leaving the field, and the scope of the attached patent is defined as 561779. Simple illustration on page 12

Claims (1)

561779 _Case No. 89117960_Year Month Amendment_ 6. Scope of Patent Application The automatic paper feeding device is used in a scanner. 8. The paper separation guide as described in item 5 of the patent application scope, wherein the automatic paper feeding device is used in a photocopier. 9. An automatic paper feeding device, comprising: a paper feeding table, which is a downwardly inclined surface for placing and positioning paper to be fed; a paper separating wheel for driving a first placed on the paper feeding table The paper moves forward; a paper separation guide is an elastic body that is used to block the movement of a second paper and the paper behind it when the first paper is driven by the paper separation wheel; and a paper separation friction An elastic element is arranged below the pad, and when the first paper is conveyed between the paper separation wheel and the paper separation friction pad, the first paper is brought into close contact with the paper separation wheel by the elasticity of the elastic element. 10. The automatic paper feeding device according to item 9 of the scope of patent application, wherein the paper separation guide further includes a main body plane having a plurality of connecting edges. 11. The automatic paper feeding device as described in item 10 of the scope of patent application, wherein the paper separation guide further includes a vertical surface perpendicular to the plane of the main body to directly or indirectly bear against the leading edge of the paper. 1 2. The automatic paper feeding device according to item 11 of the scope of patent application, wherein the paper separation guide further comprises a circular arc surface located between the vertical plane and the plane of the main body, which is the vertical plane and the main body The connecting turning plane of the plane. 1 3. The automatic paper feeding device according to item 12 of the scope of patent application, wherein the paper separation guide further includes a first paper guide inclined surface and a second paper guide inclined surface Page 14 561779 Case No. 89117960 Amendment 6. The scope of patent application, wherein the first paper guide slope and the second paper guide slope are respectively connected to the main plane with the same inclination to guide the paper to be stuck in The separation wheel and preliminary arrangement of paper. 14. The automatic paper feeding device as described in item 13 of the scope of the patent application, wherein the thickness of the paper is less than one-half of the radius of curvature of the arc surface and greater than one-quarter of the radius of curvature of the arc surface. 15. The automatic paper feeding device according to item 14 of the scope of patent application, wherein the automatic paper feeding device further includes a paper guide for guiding the direction of the paper. 16. The automatic paper feeding device according to item 15 of the scope of patent application, wherein the automatic paper feeding device is used in a facsimile machine. 1 7. The automatic paper feeding device according to item 15 of the scope of patent application, wherein the automatic paper feeding device is used in a scanner. 18. The automatic paper feeding device described in item 15 of the scope of patent application, wherein the automatic paper feeding device is used in a photocopier. Page 15