WO2018056537A1 - Paper feeding device and image forming device having same - Google Patents

Abstract

Disclosed is a paper feeding device. The paper feeding device comprises a paper loading part and a friction member which is slantly disposed on a paper loading surface of the paper loading part and causes friction with paper, wherein one side of the friction member located at a downstream with reference to a transfer direction of the paper is movably spaced from the paper loading surface to press the paper.

Description

Paper feeder and image forming apparatus having same

The present invention relates to a paper feeding apparatus having improved paper feeding performance and an image forming apparatus including the same.

The image forming apparatus refers to an apparatus for printing an input image signal on a printing medium through an image forming unit. The image forming apparatus corresponds to a printer, a copying machine, a facsimile, or a multifunction printer incorporating these functions into one device. The copier or multifunction machine further includes a scanning unit for scanning an image recorded on an original, and may print the scanned image on a print medium by transmitting the scanned image signal to the image forming unit.

A general image forming apparatus includes a sheet feeding apparatus for feeding a paper such as a print medium or a document into an image forming unit or a scanning unit of an image forming apparatus, and a plurality of sheets loaded in the sheet feeding apparatus are loaded by a pickup apparatus such as a pickup roller. The sheet may be picked up one by one and then transferred to a scanning unit or an image forming unit through a transfer device such as a transfer roller.

However, due to the frictional force between a plurality of sheets of paper loaded in the paper feeder, two or more sheets of paper may be picked up and transported at a time, which may cause paper jams in the transfer process, causing malfunction of the image forming apparatus. .

Recently, a retard roller is disposed below the path on which the paper is conveyed to prevent the feeding of the paper, and when the paper feeding friction is less than the threshold torque value, the retard roller is used to prevent the feeding of the paper. There is a limit in the number of sheets of paper that can be prevented, there is a problem that the structure of the image forming apparatus is complicated by the separate parts.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feeder capable of preventing friction of paper by applying friction to loaded paper and a chemical forming apparatus including the same.

The present invention for achieving the above object, the paper loading portion; And a friction member disposed to be inclined on the paper loading surface of the paper loading part to rub against the paper, wherein the friction member has one side located downstream of the paper loading direction so as to flow away from the paper loading surface. It provides a paper feeding device for pressurizing.

Also, in order to achieve the above object, the present invention provides an image forming apparatus comprising a sheet feeding unit for feeding a sheet into a scanning unit of the main body, wherein the sheet feeding unit comprises: a sheet stacking unit; And a friction member disposed to be inclined on the paper loading surface of the paper loading part to rub against the paper, wherein the friction member has one side located downstream of the paper loading direction so as to flow away from the paper loading surface. It is possible to provide an image forming apparatus that presses.

In addition, in order to achieve the above object, the present invention, the image forming apparatus comprising a paper feeding device for feeding the paper to the image forming unit of the main body, the paper feeding device, the paper loading unit; And a friction member disposed to be inclined on the paper loading surface of the paper loading part to rub against the paper, wherein the friction member has one side located downstream of the paper loading direction so as to flow away from the paper loading surface. It is possible to provide an image forming apparatus that presses.

1 is a perspective view illustrating a paper feeding apparatus and an image forming apparatus including the same according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating the paper feeding device shown in FIG. 1.

3 is a cross-sectional view schematically showing a cross section of the paper feeding device shown in FIG. 2.

4 is a cross-sectional view schematically showing a cross section of a paper feeding apparatus according to another embodiment of the present invention.

5 is a cross-sectional view schematically showing a cross section of a paper feeding apparatus according to another embodiment of the present invention.

6A and 6B are views showing a modified example in which the friction member shown in FIG. 3 is disposed in the paper stacking portion.

FIG. 7 is a perspective view illustrating a state in which a friction member is disposed in the paper feeding tray illustrated in FIG. 1.

FIG. 8 is a perspective view illustrating a friction member disposed in the first cassette illustrated in FIG. 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below will be described based on the embodiments best suited for understanding the technical features of the present invention, and the technical features of the present invention are not limited by the embodiments described below. Illustrates that the present invention can be implemented as in the embodiments.

Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention. And in order to help the understanding of the embodiments described below, in the reference numerals described in the accompanying drawings, among the components having the same function in each embodiment, the related components are denoted by the same or extension number.

1 is a perspective view showing a paper feeding apparatus and an image forming apparatus 1 including the same according to an embodiment of the present invention.

The image forming apparatus 1 according to an embodiment of the present invention may be a printer, a copier, a scanner, a facsimile, or the like, and is a multifunction peripheral (MFP) that implements these functions through one device. In the following description, the image forming apparatus 1 is a multifunction device for convenience of description.

In addition, the paper feeder according to an embodiment of the present invention may be configured in a number, automatic document feeding (ADF) device for feeding the paper to the scanning unit of the image forming apparatus 1, the main body of the image forming apparatus And a paper feed tray that is rotatably coupled to the paper feeder for feeding paper to the image forming portion of the main body, or a paper feed cassette that is movably coupled to the main body to feed the paper to the image forming portion of the main body.

Hereinafter, for convenience of description, an automatic document feeder, a paper feed tray, or a paper feed cassette will be collectively referred to as a paper feeder.

As shown in FIG. 1, the image forming apparatus 1 may include a plurality of paper feeders 10, 20, and 30, and the paper feeder 10 disposed on the upper portion of the main body may be rotated on the side of the main body. And a paper feeding device 30 coupled to the lower portion of the main body and the paper feeding device 30 to be movable.

As described above, the paper feeder 10 disposed above the main body may be an automatic document feeder that feeds paper into the scanning unit of the image forming apparatus 1.

In addition, the paper feeding device 20 which is rotatably coupled to the side of the main body has a paper feed tray 20 which one end is rotatably coupled to the main body so that the upper surface protrudes outward so that the paper can be loaded on the upper surface. It may include.

In addition, the paper feeding device 30 which is movably coupled to the lower part of the main body may be a paper feed cassette 30 which is capable of drawing in and out of the main body and is loaded with a plurality of papers. It may include two cassettes (31, 32).

Hereinafter, a configuration of a paper feeder according to an embodiment of the present invention will be described based on the paper feeder 10 disposed above the main body, and for the paper feeders 20 and 30 disposed on the side and the bottom of the main body. Duplicate explanations are omitted.

FIG. 2 is a perspective view illustrating the paper feeding device 10 shown in FIG. 1.

Referring to FIG. 2, the paper feeding device 10 is rotatably coupled to one end of the base 12 and the base 12 supporting the paper loading part 11, the paper loading part 11 on which paper is loaded. It includes a cover 13 for opening and closing a portion of the stacking portion (11).

The friction member 100, the pickup roller 200, and the transfer roller 300 are disposed inside the cover 13.

The friction member 100 may apply frictional force to the paper by rubbing against the paper being disposed on the paper loading portion 11. Through this, only the top sheet of the plurality of sheets arranged in the paper stacking unit 11 is picked up by the pickup roller 200 and transported by the transfer roller 300, and the remaining sheets are subjected to friction with the friction member 100. Can be fixed.

The friction member 100 may be made of a material having a larger coefficient of friction than paper, such as rubber or polyurethane.

As shown in FIG. 2, the friction member 100 may have a rectangular plate shape and is disposed at the center of the paper loading surface of the paper loading portion 11.

The friction member 100 is preferably disposed on the position of the paper stacking portion 11 corresponding to the center portion of the paper so as to rub against the center portion of the paper.

Although only a single friction member 100 is shown in FIG. 2, the friction member may be composed of a plurality of friction members, and the friction members including the plurality of friction members may be arranged at regular intervals on the paper loading surface of the paper loading part 11, thereby providing various positions of the paper. May apply friction to

For example, the plurality of friction members may be arranged along the width direction of the paper loading surface, or may be arranged along the longitudinal direction of the paper loading surface.

In addition, the friction member 100 may be disposed to be inclined with respect to the paper loading surface of the paper loading portion 11, and may be disposed to be inclined at a predetermined initial angle θ0 with respect to the paper loading surface. The friction member 100 is preferably disposed to be inclined upward with respect to the paper loading surface based on the conveying direction of the paper disposed in the paper loading portion 11.

Detailed description of the friction member 100 will be described later.

The pickup roller 200 rotates in contact with the uppermost sheet of paper loaded on the sheet stacking unit 11, thereby applying a frictional force to the uppermost sheet of paper and picking up the sheets in a single sheet.

For example, the pick-up roller 200 may be capable of lifting up and down, picking up one sheet of paper by moving down and rotating in contact with the paper, and moving up and down, and then rotating down and rotating again to sequentially stack a plurality of sheets of paper. You can pick up sheets one by one.

The paper picked up by the pickup roller 200 may be transferred to the scanning unit or the image forming unit by the transfer roller 300.

The conveying roller 300 may include first and second conveying rollers 310 and 320 disposed up and down to apply rotational force to the upper and lower surfaces of the paper, and the first and second conveying rollers 310 and 320 may be By rotating at the same time, the paper can be conveyed.

The pickup roller 200 and the transfer roller 300 are the same as or similar to the prior art, and thus detailed description thereof will be omitted.

The cover 13 is a configuration that surrounds the friction member 100, the pickup roller 200, and the transfer roller 300 so as not to be exposed to the outside, and is rotatably coupled to the rotating shaft 121 provided at one side of the base 12. Can be opened or closed.

In addition, the first conveying roller 310 is coupled to the cover 13, and the second conveying roller 320 is coupled to the base 12, whereby the first sheet of paper loaded in the paper stacking portion 11 is conveyed. Even if the feed roller 310 is caught between the second feed roller 320, the cover 13 can be opened to easily remove the jammed paper.

In FIG. 2, the pick-up roller 200 and the feed roller 300 are disposed in the paper feeder 10 as an example. However, the pick-up roller and the feed roller are separated from the paper feeder in the chemical forming apparatus 1. It may be arranged, and may be arranged on a variety of positions that can pick up and transfer the paper disposed in the paper loading portion.

3 is a cross-sectional view schematically illustrating a cross section of the paper feeder 10 shown in FIG. 2.

Hereinafter, the friction member 100 according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

FIG. 3A is a view showing the paper feeding device 10 in which no paper is loaded, and FIG. 3B is a view showing the paper feeding device 10 in which a plurality of stacked sheets P1 are loaded.

As described above, the plurality of sheets P1 stacked on the paper stacking unit 11 are picked up by the pickup roller 200 and transferred to the feed roller 300, and the scanning unit or the image is transferred by the feed roller 300. It may be sequentially transferred to the forming portion.

As such, the paper may be conveyed in the direction of the upstream (U) upstream (U) of the paper loading portion 11 on the basis of the conveying direction. The upstream U and the downstream L are terms for referring to a relative position, and the position may be changed according to the reference.

The friction member 100 may be prevented from being fed by applying a frictional force to the paper disposed in the lower layer of the stacked paper disposed upstream (U) than the pickup roller (200).

In order to prevent the conveyance of paper, the friction coefficient of the friction member 100 is preferably greater than the friction coefficient between the laminated paper and the paper.

The paper stacking part 11 may be disposed to be inclined at a predetermined angle α with respect to the bottom surface S, and may be disposed to be inclined downward from the upstream U to the downstream L. FIG. Through this, a plurality of sheets stacked on the paper stacking portion 11 are disposed to be inclined toward the downstream L, so that they can be picked up smoothly and sequentially by the pickup roller 200.

As described above, the friction member 100 is disposed to be inclined upward at a predetermined initial angle θ0 toward the paper loading surface of the paper loading portion 11 from the upstream U to the downstream L. As shown in FIG.

As shown in (a) of FIG. 3, the friction member 100 has one side located on the downstream side L based on the conveying direction of the paper P1 so as to be able to flow with the paper loading surface of the paper loading part 11. Spaced apart. In addition, the friction member 100 is fixed to the paper loading surface of the paper loading portion 11, the other side located in the upstream U based on the conveying direction of the paper P1.

The other side of the friction member 100 may be fixed to the paper loading portion 11 through an attachment member such as an adhesive or a double-sided tape.

As shown in (b) of FIG. 3, the paper disposed on the lowermost layer of the plurality of papers P1 stacked on the paper loading part 11 may be in contact with one side of the friction member 100, and thereby, friction The member 100 and the paper P1 may rub against each other.

Since the friction member 100 disposed to be inclined upwardly from the paper loading surface of the paper loading part 11 is located above the other side opposite to the opposite side of the downstream L, one side of the friction member 100 may be different from the paper P1. A friction force is applied to the paper P1 by contact with the paper P1, and the other side may not contact the paper P1.

In addition, since the paper P1 loaded on the paper loading portion 11 may press the friction member 100 due to its weight, the one side of the friction member 100 that is movable may have a paper loading portion of the paper loading portion 11. You can move towards the face.

That is, the friction member 100 is pressed by the paper P1 so that one side is lowered toward the paper loading surface of the paper loading portion 11, and thus, the angle formed with the paper loading surface of the paper loading portion 11 is The first angle θ1 is smaller than the initial angle θ0.

Therefore, the friction member 100 moved to form the first angle θ1 by the paper P1 may also press the paper P1 by a restoring force to return to the initial angle θ0.

That is, one side of the friction member 100 that is pressed by the paper P1 and lowered toward the paper loading surface of the paper loading part 11 may press the paper P1, and thereby, the friction member 100. From the paper P1 can be increased.

As such, the friction member 100 is spaced apart from the paper stacking surface of the paper stacking portion 11 so that one side located in the downstream L is movable, and upwards toward the paper P1 loaded in the paper stacking portion 11. It is possible to press, through which the friction member 100 can increase the friction force applied to the plurality of paper (P1) bar, the paper stacked below the paper disposed on the top layer is picked up or transported with the top layer paper It can prevent the feeding.

FIG. 3C is a cross-sectional view showing a portion of the paper P2 positioned downstream of the paper L in the curling state in the paper stacking portion 11.

As shown in FIG. 3C, while the paper P2 is picked up by contacting the rotating pick-up roller 200, a part of the paper P2 may be rolled toward the pick-up roller 200. In addition, a part of the paper P2 may be curled in a process of loading the paper P2.

However, as shown in FIG. 3C, even if a portion of the paper P2 is rolled toward the pickup roller 200, the friction member 100 disposed to be inclined upward may have one side of the paper P2 flowing therethrough. You can keep in touch with some parts.

Although a portion of the paper P2 is curled toward the pickup roller 200, even if the contact force between the paper P2 and the pickup roller 200 is increased and the frictional force is increased, the friction member 100 may be at a second angle θ2. And thus, one side of the friction member 100 can continuously press the paper (P2).

Through this, even if the paper is loaded in the paper loading portion 11 in a part of the curled shape, the heavy feeding of the paper (P2) can be prevented through the friction member 100.

FIG. 3D is a cross-sectional view showing a state in which the central portion of the paper P3 loaded on the paper stacking portion 11 is curved upward.

In the process of loading a plurality of sheets of paper P3 into the sheet stacking portion 11, a portion of the sheet of paper P3 is bent or, for example, the center portion is curved upward. The paper P3 may be loaded in a non-parallel shape.

As shown in Fig. 3D, when the central portion of the paper P3 is bent upward, when the contact area between the paper P3 and the paper loading surface of the paper loading portion 11 becomes small, the paper ( P3) can reduce the frictional force with the paper loading portion (11).

Therefore, since the paper P3 can be picked up or conveyed even with a smaller force, the paper stacked below with the paper disposed on the uppermost layer can be easily conveyed, as shown in FIG. One side of the friction member 100 disposed to be inclined upward may continuously contact a portion of the paper P3 to prevent feeding.

Specifically, the friction member 100 forms a third angle θ3, and one side of the friction member may continuously press the paper P3.

Therefore, even if the frictional force with the paper loading surface is reduced by bending the central portion of the paper P3 upward, one side of the friction member 100 can continuously apply frictional force to the paper P3, and thereby, the paper ( Feeding of P3) can be prevented.

4 is a cross-sectional view schematically showing a paper feeding device 10 according to another embodiment of the present invention. Since most of the configuration of the paper feeding device 10 shown in FIG. 4 is the same as the paper feeding device shown in FIG. 3 described above, redundant description thereof will be omitted.

As shown in (a) to (d) of FIG. 4, the paper feeding device 10 includes an auxiliary friction member 110 disposed downstream L based on the conveying direction of the paper rather than the friction member 100. do.

The auxiliary friction member 110 may be fixed to the paper loading surface of the paper loading portion 11, the frictional force applied by the auxiliary friction member 110 to the paper (P1, P2, P3) is the friction member 100 to the paper The applied force may be less than the frictional force.

The auxiliary friction member 110 is disposed on the position of the paper stacking surface of the paper stacking portion 11 corresponding to the pickup roller 200, so that the paper P1, P2, P3 in a direction perpendicular to the pickup roller 200. Additional friction may be applied towards.

In addition, by varying the position of the auxiliary friction member 110 in various ways it is possible to finely adjust the size of the friction force applied to the paper (P1, P2, P3) through the friction member 100 and the auxiliary friction member 110.

In addition, as shown in (c) and (d) of Figure 4, a portion of the paper (P2) is rolled toward the pickup roller 200 or the paper loading portion in the center of the paper (P3) is curved upwards Even if it is loaded on the 11, the movable side of the friction member 100 continuously touches a portion of the paper P2, P3 and presses the paper P2, P3 so that the feeding of the paper P2, P3 can be prevented. have.

5 is a cross-sectional view schematically showing a paper feeding device 10 according to another embodiment of the present invention. Most of the configuration of the paper feeding device 10 shown in FIG. 5 is the same as most of the paper feeding device shown in FIG.

Referring to FIG. 5, the paper loading portion 11 ′ further includes a curved portion 111 ′ formed such that the central portion thereof is curved upward toward the paper P3.

Since the friction member 100 is disposed on the curved portion 111 ′, the friction member 100 may be positioned above the auxiliary friction member 110.

Through this, the pressure applied to the paper P3 by the friction member 100 disposed on the curved portion 111 ′ protruding toward the paper P3 may be increased, and the friction force with the paper P3 may also be increased.

In addition, as shown in FIG. 5, even if the frictional force with the paper loading surface is reduced by bending the central portion of the paper P3 upward, one side of the friction member 100 may press the paper P3 continuously, The pressure applied to the paper P3 can be increased.

Therefore, even if the frictional force with the paper loading surface is reduced by bending the center portion of the paper P3 upward, the feeding force of the paper P3 can be prevented more effectively since the frictional force applied to the paper P3 can be increased.

6A and 6B illustrate various modifications in which the friction member 100 is disposed in the paper stacking portion 11.

Referring to Figure 6a (a), the friction member 100 may be made of an elastic body, by adjusting the elastic force of the elastic body constituting the friction member 100, the friction member 100 can adjust the pressure applied to the paper. have.

In addition, the connection member 400 is coupled to the other side located in the upstream U based on the conveying direction of the sheet of the friction member 100.

The connection member 400 may be coupled to the paper loading surface of the paper loading portion 11 to fix the friction member 100 to the paper loading portion 11.

The connection member 400 may include an inclined portion 401 inclined at a predetermined angle θ0 'with respect to the container loading surface of the container loading part 11.

As the friction member 100 is coupled to the inclined portion 401, the friction portion 100 and the paper loading surface of the container loading portion 11 may be arranged to form a constant initial angle θ0 ′.

In addition, by changing the predetermined angle θ0 'formed by the inclined portion 401, the initial angle θ0' formed by the paper loading surface of the friction member 100 and the container loading portion 11 can be easily changed.

In addition, the friction member 100 is made of a hard, the connection member 400 may be made of an elastic body, one side of the friction member 100 may flow by the elastic force of the connection member 400.

The connection member 400 may have adhesiveness and may be made of synthetic resin, rubber, and the like.

Referring to FIG. 6A (b), the support layer 500 may be coupled to the lower portion of the friction member 100.

The support layer 500 may support the friction member 100, and by configuring the elastic force of the support layer 500 different from the elastic force of the friction member 100, the friction member 100 may control the force applied to the paper.

Specifically, the friction member 100 and the support layer 500 may be different in material, by configuring the elastic force of the support layer 500 larger than the elastic force of the friction member 100, the force applied to the paper by the friction member 100 Can be increased.

Through this, the friction member 100 can increase the friction force applied to the paper.

In addition, the pressure and frictional force applied to the paper by the deformation of the support layer 500, such as changing the thickness of the support layer 500 or arranging the support layer 500 only on a lower portion of the friction member 100. Can be finely adjusted.

Referring to FIG. 6A (c), the friction preventing member 600 having a lower friction coefficient than the friction coefficient of the friction member 100 may be further coupled to the upper portion of the friction member 100.

The friction preventing member 600 is coupled to the upper end of the other side located in the upstream U based on the conveying direction of the sheet of the friction member 100.

In order to be picked up by the pick-up roller 200 and conveyed through the feed roller 300, the paper placed on the top layer among the plurality of papers arranged on the paper stacking part 11, the paper having the friction member 100 arranged on the top layer. The force applied to the sheet disposed on the top layer by the pickup roller 200 should be greater than the friction force applied to the sheet.

In the paper loaded in the paper stacking unit 11 is sequentially picked up and transported, when the paper disposed in the upper portion is picked up by the pickup roller 200 after the paper disposed in the upper portion is transferred, the friction member 100 It may not be picked up or transported by the other side or the frictional force with the friction member 100 becomes greater than the force of the pick roller 200.

Through the anti-friction member 600 disposed on the other side of the friction member 100, it is possible to reduce the friction force applied to the paper in contact with the other side of the friction member 100, so that the paper is caught on the other side of the friction member 100 This can prevent the pickup or transfer from being interrupted.

In addition, the size or friction coefficient of the friction preventing member 600 may be variously changed, and through this, the friction member 100 may adjust a range in which the frictional force is applied to the paper.

Referring to (d) and (e) of Figure 6, the friction member 100 may be further coupled to the elastic member 700, 800 that can apply an elastic force to the friction member 100.

Specifically, the support members 710 and 810 may be coupled to the lower end of the friction member 100, and the support members 710 and 810 may be elastic units 720 and 820 for applying an elastic force to the support members 710 and 810. It can be combined with

One end of the support members 710 and 810 located in the upstream U based on the conveying direction of the paper may be rotatably coupled to the paper loading part 11.

Therefore, the friction member 100 can rotate about the other side located in the upstream (U).

The elastic units 720 and 820 may provide an elastic force to the friction member 100 in the direction in which the friction member 100 presses the paper. For example, the elastic units 720 and 820 may exert a force in the direction in which the friction member 100 lifts the paper, and exerts an elastic force in a direction opposite to the force applied to the friction member 100 due to the weight of the paper. Can provide.

The elastic units 720 and 820 that provide elastic force to the friction member 100 may be coupled to the support members 710 and 810 so that the rotatable friction member 100 may press the paper.

As shown in (d) of FIG. 6B, the elastic unit 720 may be a torsion spring 720 coupled to one end of the support member 710.

In addition, as shown in (e) of Figure 6b, the elastic unit 820 is a compression spring 820 coupled to the other side opposite to one side of the support member 810 rotatably coupled to the paper loading portion 11 Can be).

FIG. 7 is a perspective view illustrating a state in which the friction member 100 is disposed on the paper feed tray 20 shown in FIG. 1.

As illustrated in FIG. 7, the friction member 100 may include a paper feed tray 20 that is rotatably coupled to a main body of the image forming apparatus 1, in addition to the paper feeding apparatus 10 disposed above the image forming apparatus 1. ) May be disposed.

One end of the paper feed tray 20 is rotatably coupled to the main body, so that the paper loading surface may protrude from the main body by being rotated so that the paper can be loaded in use, and the paper disposed on the paper loading surface of the paper feeding tray 20 may be It may be fed to the image forming unit of the main body through the pickup roller (not shown) and the transfer roller (not shown).

In addition, when the paper feed tray 20 is not in use, the paper loading surface of the paper feed tray 20 rotates to contact the outer surface of the main body, thereby reducing the volume of the image forming apparatus 1.

In the central portion of the paper loading surface of the paper feed tray 20, the friction member 100 may be disposed to be inclined upward at a preset initial angle θ0 based on the conveying direction of the arranged paper.

Since the friction member 100 has the same or similar configuration as the friction member described with reference to FIGS. 2 to 5, overlapping descriptions thereof will be omitted.

The movable side of the friction member 100 disposed downstream of the paper sheet L based on the conveying direction of the sheet may apply a frictional force to the sheet by friction with the stacked sheet.

In addition, even if a part of the loaded paper is curled or curved, the friction member 100 may continuously press the paper to apply frictional force, thereby causing a heavy feed that may occur in feeding the image forming unit through the paper tray 20. You can prevent it.

The paper feed tray 20 may be changed to various structures in addition to the above description, but the description thereof will be omitted because it is the same as or similar to the related art.

FIG. 8 is a perspective view illustrating a state in which the friction member 100 is disposed in the first cassette 31 illustrated in FIG. 1.

As described above, the paper feed cassette 30 may be composed of first and second cassettes 31 and 32, but for the sake of convenience, the friction member 100 disposed on the first cassette 31 will be described below. An example will be described.

The first cassette 31 may be detachably coupled to the main body of the image forming apparatus 1.

Through this, the paper may be loaded in the first cassette 31 and inserted into the main body to supply the paper to the image forming unit of the main body, or the first cassette 31 may be taken out of the main body to further load the paper.

The first cassette 31 includes a first housing 311 having an outer side and a lifting plate 312 disposed inside the first housing 311, the upper side of which is open so that paper can be loaded.

One end 3121 of the lifting plate 312 disposed on the upstream U of the sheet may be rotatably coupled to the rotation shaft 3111 of the first housing 311.

A lifting device (not shown) may be disposed at the other end opposite to one end 3121 of the lifting plate 312.

The lifting device may include a spring or the like, and by pushing the other side of the lifting plate 312 in the paper direction, the lifting plate 312 may support the paper as a whole.

Through this, the paper can be in continuous contact with the pickup roller 200, the paper may be sequentially picked up through the pickup roller 200.

In addition, the friction member 100 may be disposed on the lifting plate 312.

Since the friction member 100 has the same or similar configuration as the friction member described with reference to FIGS. 2 to 5, overlapping descriptions thereof will be omitted.

The friction member 100 may be disposed to be inclined upward at a preset initial angle θ0 based on the conveying direction of the disposed paper.

The movable side of the friction member 100, which is disposed downstream of the paper L based on the conveying direction of the paper, may continuously press the loaded paper, and thereby, may continuously apply frictional force to the paper.

Therefore, even if a part of the loaded paper is curled or curved, the friction member 100 may continuously press the paper to apply frictional force, so that the feeding may occur during feeding to the image forming unit through the first cassette 31. Can be prevented.

The first cassette 31 may be changed to various structures in addition to the above description, but the description is omitted because it is the same as or similar to the prior art.

In the above, various embodiments of the present invention have been described separately, but each embodiment is not necessarily implemented alone, and the configuration and operation of each embodiment may be implemented in combination with at least one other embodiment.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the above-described specific embodiment, the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (15)

1. Paper loading unit; And

   And a friction member disposed to be inclined to the paper loading surface of the paper loading portion to rub against the paper.

   And the friction member presses the paper so that one side located downstream of the paper feeding direction is spaced apart from the paper stacking surface so as to flow therethrough.
2. The method of claim 1,

   And the friction coefficient of the friction member is larger than the friction coefficient between the paper and the paper.
3. The method of claim 1,

   And the friction member is made of an elastic body.
4. The method of claim 1,

   And the friction member is disposed upstream of the paper feed direction relative to the pickup roller picking up the paper sheet.
5. The method of claim 1,

   And at least one auxiliary friction member disposed downstream of the friction member relative to the conveying direction of the paper.
6. The method of claim 1,

   Further comprising a connecting member coupled to the other side of the friction member coupled to the other side of the friction surface member,

   And the connecting member includes an inclined portion formed such that the friction member and the paper loading surface have a predetermined angle.
7. The method of claim 1,

   Further comprising a support layer coupled to the lower portion of the friction member,

   And the elastic force of the support layer is different from the elastic force of the friction member.
8. The method of claim 1,

   And an anti-friction member coupled to an upper end of the other side opposite to the one side of the friction member and having a lower friction coefficient than the friction coefficient of the friction member.
9. The method of claim 1,

   The friction member is the other side opposite to the one side is rotatably coupled to the paper loading portion,

   And an elastic unit for providing an elastic force to the friction member so that the friction member presses the paper.
10. An image forming apparatus comprising a sheet feeding unit for feeding a sheet of paper into a scanning unit of a main body,

    The paper feeder,

    Paper loading unit; And

    And a friction member disposed to be inclined to the paper loading surface of the paper loading portion to rub against the paper.

    And the friction member presses the paper so that one side located downstream of the paper conveying direction is spaced apart from the paper stacking surface so as to flow therethrough.
11. The method of claim 10,

    A pickup roller for picking up sheets of paper stacked in the paper stacking unit; And

    And a feed roller for transferring the picked paper to the scanning unit.
12. An image forming apparatus comprising a sheet feeding unit for feeding paper into an image forming unit of a main body,

    The paper feeder,

    Paper loading unit; And

    And a friction member disposed to be inclined to the paper loading surface of the paper loading portion to rub against the paper.

    And the friction member presses the paper so that one side located downstream of the paper conveying direction is spaced apart from the paper stacking surface so as to flow therethrough.
13. The method of claim 12,

    And the paper loading portion is a paper feed tray rotatably coupled to the main body.
14. The method of claim 12,

    And the paper loading portion is a paper cassette movably coupled to the main body.
15. The method of claim 12,

    A pickup roller for picking up sheets of paper stacked in the paper stacking unit; And

    And a feed roller for transferring the picked paper to the image forming unit.

Images