KR100231885B1 - Paper feeding system for preventing double feeding - Google Patents

Abstract

The present invention relates to a sheet separator for supplying originals in sheets to office equipment such as facsimile machines or copiers, and a main object of the present invention is to increase the contact area of the rubber pad in contact with the originals, thereby smoothing the sheet separation operation of the originals. It is to provide a sheet separator configured to be made.

The constituent means for achieving the present invention is an upper guide wall (10) having a guide hole (11) formed toward the ADF roller (90), forming a hook (13) and a fitting jaw (15) at the bottom of the member. )and; The central portion of the member is bent at an angle, and one side thereof may be coupled to the hook 13 of the guide wall 15 of the guide wall, and fastened, and the opposite side may be connected to the front surface of the ADF roller 90 at both sides. A leaf spring 30 forming an arm 31 to be formed; A rubber pad 20 fitted between the leaf spring 30 and the upper guide wall 10 to be in contact with the surface of the ADF roller 90; Inserted into the guide hole 11 of the guide wall, it is characterized in that it comprises a pressing body 40 for pressing the rubber pad 20 by installing a spring on the top.

Description

Sheet Separator for Original Automatic Document Feeder

The present invention relates to a sheet separator for supplying documents or sheets in a general office equipment such as a facsimile machine or a copy machine, and more particularly, to allow a plurality of documents loaded in a paper cassette or a tray to be supplied as a sheet. A sheet separator of an automatic sheet feeder.

In general, general office equipment such as copiers, fax machines, and printers are provided with an automatic paper feeder for feeding a plurality of documents or papers loaded in a paper cassette into the feed path of the machine. A sheet separator is installed to separate and feed the document or paper so that it does not feed several sheets at a time.

A representative example of such a sheet separator is shown in Figure 1a and 1b, the rubber pad 70 and the leaf spring 60 is installed on the upper guide wall 50 by a screw 87 to the lower ADF roller (90) It is installed to be in close contact with the surface.

In this case, a sliding film 73 is attached to a predetermined area of the rubber pad 70, and the leaf spring 60 has a central portion to press the rubber pad 70 to be in close contact with the surface of the ADF roller 90. The arm is bent at a certain angle, and both sides of the leaf spring 60 are further bent at a predetermined angle to extend to contact the circumferential surface of the ADF roller 90 on the front side (inlet side) than the rubber pad 70 contact surface. 63 is formed.

Looking at the operation relationship of the sheet separator according to the above configuration, first, when the original is loaded in the paper feed tray, a plurality of originals are fed into the feed path inlet, wherein the originals fed by the arm spring of the leaf spring described above In close contact with the circumferential surface of the ADF roller 90, the ADF roller 90 starts to be fed into the feed path as the ADF roller 90 rotates.

At this time, the rubber pad 70 is in close contact with the upper part of the document to be fed, so that the frictional resistance of the rubber pad 70 acts, so that the bottom of the document is in contact with the surface of the ADF roller 90. Only the positioned originals are fed. This principle applies the frictional resistance of the rubber pad 70 to all of the fed sheets of paper, but the frictional resistance of the rubber pad 70 is lower than that of the rubber pad 70. As the frictional contact force of) acts more largely, the document passes through the rubber pad 70 and is fed into the feed path.

In this case, a sliding film 73 having a small frictional resistance is attached to a predetermined area of the rubber pad 70, that is, the rubber pad 70 before the rubber pad 70 contacts the ADF roller 90. 73) prevents the document ends fed along the surface of the ADF roller 90 from being crushed by the rubber pad 70 extension and smoothly to the contact point of the ADF roller 90 with the rubber pad 70. As described above, the document is separated into sheets by the rubber pad 70 at the end thereof.

However, in such a conventional sheet separating apparatus, the document is separated by the narrow contact area between the rubber pad 70 pressed by the leaf spring 60 and the original conveyed along the ADF roller 90, so that the original The frictional resistance between the rubber pad and the rubber pad 70 had a problem that it was difficult to separate a plurality of originals smoothly. Also, in order to solve this problem, if the contact force of the leaf spring 60 was increased, the ADF roller 90 There is a problem that the wear amount of the rubber pad 70 in contact with the increase.

In addition, in order to install the above-mentioned sheet separating apparatus on the upper guide wall 50, there is a problem of deterioration in assemblability that a separate fastening means such as a screw 87 is used.

Therefore, the present invention has been devised to solve such a conventional problem, and the main object of the present invention is to increase the contact area of the rubber pad in contact with the above-described document, so that the sheet separation operation of the document can be made smoothly. Another object of the present invention is to provide a sheet separator that can be simply fastened by its own structure without using a separate fastening means for coupling the sheet separator.

Figure 1a is a main portion side cross-sectional view showing a state in which the conventional sheet separator is assembled in the device,

1B is an exploded perspective view illustrating a state in which the sheet separator of FIG. 1A is assembled;

2 is an exploded perspective view showing a state in which the sheet separator according to the present invention is assembled;

Figure 3 is a main portion side cross-sectional view showing a state in which the sheet separator according to the present invention is assembled in the apparatus.

*** Explanation of symbols for the main parts of the drawing ***

10: upper guide wall 11: guide hole

12: coupling groove 13: hook

15: fitting jaw 20: rubber pad

23: through groove 30: leaf spring

31: arm 33: coupling groove

35 extended surface 40 pressurized body

42: hook 45: protrusion

47: spring 50: upper guide wall

60: leaf spring 61: end

63: arm 65: through groove

70: rubber pad 73: film

75: through groove 80: bracket

85: through groove 87: screw

90: ADF Roller

The constituent means for achieving the object of the present invention, the upper guide wall formed by forming a hook and a projection protruding downward on the bottom of the member, the guide hole opened toward the ADF roller while forming a coupling groove on the top and;

The central portion of the member is bent at an angle to form an arm that is further bent on both sides of the member to extend to be in contact with the front surface of the ADF roller, and the center portion of the member has a through hole coupled to the hook of the guide wall. A leaf spring formed by inserting an end portion opposite the arm of the member into the fitting jaw of the guide wall and engaging the hook with the coupling groove;

A rubber pad which is formed between the leaf spring and the upper guide wall and is connected to the surface of the ADF roller by forming a through groove through which the hook passes in a central portion of the member;

A press body inserted into the guide hole of the guide wall and having a hook coupled to the coupling groove so as to be able to flow therebetween, and having a press portion formed in a V shape to be in close contact with the rubber pad at the bottom;

It characterized in that the pressing body is configured to include a spring installed on the pressing body of the guide hole so that the rubber pad is in close contact with the ADF roller surface.

According to the above configuration, first, the spring and the pressing body are inserted into the guide hole to couple the hook of the upper portion of the pressing body to the coupling groove, and then the rubber pad is fitted to the hook of the upper guide wall and the leaf spring is fitted into the guide wall. When the hook is fastened to the hook separation device is assembled.

When a plurality of originals are fed to the sheet separator and the ADF roller is rotated, the arm feeds the originals closely to the ADF roller surface. At this time, the rubber pad pressed by the pressing body separates the original into sheets. At this time, since the pressing body adheres the rubber pads at two points having a certain distance, the friction resistance for separating the originals into sheets is increased. do.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view showing the assembly of the sheet separator according to the present invention, reference numeral 20 is a rubber pad for separating the paper to be fed sheet, 30 is the ADF roller 90 and both sides It is a leaf | plate spring provided with the arm 31 joined, 40 is a press body for making the rubber pad 90 contact with the ADF roller 90 in close contact.

In addition, Figure 3 is a sectional view of the main portion showing the assembled state of the sheet separator, reference numeral 10 is a guide hole 11 for installing the press body (40) on the opposite side of the ADF roller 90 so as to be flowable ) And an upper guide wall forming a fitting jaw 15 and a hook 13 for coupling the rubber pad 20 and the leaf spring 30 to the upper portion of the inlet side.

First, the fitting guide 15 and the hook 13 for installing the leaf spring 30 and the rubber pad 20 are formed on the bottom surface of the inlet side of the upper guide wall 10 so as to face each other. On the surface facing the ADF roller 90 is formed a guide hole 11 of a rectangular cylinder shape, a pair of the hook 42 of the pressing body 40 is coupled to the upper portion of the guide hole 11 is coupled. The coupling groove 12 is formed.

The rubber pad 20 of FIG. 2 is a member having a large frictional resistance that is inserted between the leaf spring 30 to be described later and the guide wall 10 of FIG. 3 and extends to the upper surface of the ADF roller 90 described above. On both sides of one surface of the pad 20 is formed a through groove 23 is coupled to the hook 13 of the guide wall of FIG.

The leaf spring 30 is an elastic body for attaching the rubber pad 20 to the guide wall 10 of FIG. 3 and bringing the fed document into close contact with the surface of the ADF roller 90. Is bent at a central portion at an angle to one side is a surface coupled to the upper guide wall 10, the opposite surface is an extension surface 35 extending in the direction of the ADF roller 90 described above. Arms 31 which are further bent on both sides of the extension surface 35 and extended to be in contact with the front surface of the ADF roller 90 of FIG. 3 are formed, and the guide wall of FIG. 3 is formed at the center of the leaf spring 30. It is formed through the coupling groove 33 is coupled to the hook 13 of the, so that one side end of the leaf spring 30 is inserted into the fitting jaw (15) of the guide wall is coupled to the hook 13 It is formed to be coupled to the groove 33 to be fastened.

The press body 40 is inserted into the guide wall guide hole 11 of FIG. 3 to adhere the rubber pad 20 to the surface of the ADF roller 90. The press pad 40 of the press body 40 20) the contact surface is formed to increase the adhesion area by pressing the rubber pad 20 is in close contact with the surface of the ADF roller 90 by the two jaws are formed in the V-shaped jaw is formed. have.

In addition, the upper portion of the pressing body 40 is coupled to a pair of hooks 42 extending upwardly so as to be fluidly coupled to the coupling groove 12 of the guide hole of FIG. 3, the upper portion of the compression coil spring 47 is coupled The projection 45 for making it is formed.

Looking at the operation of the present invention by the above configuration as follows.

First, when a plurality of originals loaded on the paper feeder is fed toward the inlet of the transport path, the arm 31 of the leaf spring adheres the originals to the surface of the ADF roller 90, and the ADF roller 90 rotates. As a result, a plurality of originals in close contact with the surface of the roller 90 begin to be fed.

The document conveyed together with the roller 90 surface is in contact with the rubber pad 20 pressed by the upper pressurizer 40 and the upper document is fed to the rubber pad 20 by the frictional resistance of the rubber pad 20. Only the bottommost original that is in contact with the surface of the ADF roller 90 is not fed, and the reason is that the lower original has a frictional contact force with the ADF roller 90 than the friction resistance of the rubber pad 20. This is because it works more greatly.

At this time, the intermediate extension surface of the rubber pad 20, that is, the portion extending from the portion provided on the upper guide wall 10 and before contacting the ADF roller 90 surface is covered by the extension surface 35 of the leaf spring 30. In this way, the end of the document fed in contact with the ADF roller 90 surface is prevented from being crushed by the rubber pad 20 extension surface, so that the rubber pad 20 and the ADF roller 90 are in close contact with each other. Means for feeding.

In addition, at this time, since the pressure body 40 is in close contact with the ADF roller 90 by the rubber pad 20 by two jaws having a certain distance, the surface of the rubber pad 20 between these two jaws By being in close contact with, the frictional resistance acting on the original placed on the upper side is increased, so that the above-mentioned sheet separation action can be more surely performed.

As can be seen from the above, the sheet separating apparatus according to the present invention has a larger contact area in which the rubber pad 20 is in contact with the original, so that the work of separating the multiple sheets into a single sheet can be performed more smoothly. In addition, the sheet separation device can be easily fastened by the mold structure of the device itself without using a separate fastening means for coupling it.

Claims (2)

In the sheet separator for separating and feeding the fed document into sheets, A guide hole 11 formed toward the ADF roller 90 while forming a hook 13 and a fitting jaw 15 protruding downward from the bottom of the member, and forming a coupling groove 12 thereon. An upper guide wall 10; The central portion of the member is bent at an angle to form an arm 31 which is further bent on both sides of one side of the member and extended to be in contact with the front surface of the ADF roller 90, and the hook 13 of the guide wall is formed at the central portion of the member. ) Is formed to penetrate the engaging groove 33 to be coupled to the end of the arm 31 of the member into the fitting jaw (15) of the guide wall and then hook the hook 13 to the engaging groove 33 A leaf spring 30 which can be fastened; A rubber pad is formed between the leaf spring 30 and the upper guide wall 10 to form a through groove 23 through which the hook 13 passes in the center of the member, and is connected to the surface of the ADF roller 90. 20); A press body (40) inserted into the guide hole (11) of the guide wall and having a hook (42) coupled to the coupling groove (12) so as to be movable thereon; The press body 40 is configured to include a spring 47 installed on the press body 40 of the guide hole 11 so that the rubber pad 20 can be in close contact with the surface of the ADF roller 90. Sheet separator of the document automatic document feeder. According to claim 1, wherein the pressing body 40 is in contact with the rubber pad 20 is formed in a V-shaped press the rubber pad 20 by pressing the rubber pad 20 by the two jaws, A sheet separator of the automatic document feeder, characterized in that configured to increase the contact area of the ADF roller (90).

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