JPH10181913A - Paper feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably feed a cut sheet surely separated with no residual deformation one by one without an influence of a kind and a curl of the cut sheet, in a paper feeder. SOLUTION: This paper feeder is provided with a cantilever friction member 33 extended in a delivery route of a cut sheet 11 from the other surface side opposite to one surface side, with which a paper feed roller 31 of the loaded cut sheet 11 comes into contact, to be brought into contact with a tip end part of the delivered cut sheet 11 to separate one by one this cut sheet 11 by friction contact when displaced. In the vicinity of the downstream in the paper feed direction in a part of the friction member 33 in a position dislocated from the paper feed roller 31, a retaining member 61, opposed from upward to a cut sheet part into contact with a part of this friction member 33 to limit floating of this part, is provided, a down-facing curl of the cut sheet 11 is forced, the cut sheet 11 is prevented from floating up by escaping from the friction member 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device for sequentially feeding and feeding a stacked cut sheet from one side thereof by a feed roller contacting the cut sheet, and more particularly, to a cantilever extending in a cut sheet feeding path. The present invention relates to a sheet feeding device that separates cut sheets one by one by frictional contact when a friction member comes into contact with a leading end portion of a cut-out sheet to be fed and is displaced, thereby preventing double feeding. It is used for feeding a recording sheet or a document in a printer, a facsimile, or the like, feeding a document for an image reading apparatus, and in various other cases in which a plurality of stacked cut sheets are fed out one by one and used.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 7-196186 discloses such a sheet feeding device. In this conventional apparatus, as shown in FIG. 7, a friction member e which extends from below into a feeding path of a cut sheet b stacked on a sheet feeding tray a by a sheet feeding roller c, and has a lower end pivotally supported by a shaft d is provided. When the sheet feeding roller c comes into contact with the entire width of the leading end portion of the cut sheet b which is fed out each time the sheet feeding roller c makes one rotation, the sheet feeding roller c pushes back as shown by an imaginary line in FIG. The fed cut sheet b is separated into individual sheets by frictional contact so that the sheets can be fed one by one without double feeding.

The angle α between the friction surface of the friction member e and the uppermost surface b of the cut sheet is set in a range of 85 to 55 degrees so that the friction member e can be surely separated by the friction.

The above publication also discloses a friction member made of an elastic sheet provided with its lower end fixed under the same angle conditions as described above.

[0005]

By the way, fine adjustment is required for separating the cut sheet by the friction member as described above. According to experiments by the present inventors, when the cut sheet advances while pushing away the friction member, it is better to weaken the restoring force of the friction member to the initial position so that the friction member does not receive residual deformation. In order to surely separate the cut sheets, it is better to increase the restoring force so as to increase the frictional force between them. These are incompatible and difficult to set in a well-balanced manner. In addition, since the cut sheet is easy to bend, that is, the stiffness differs depending on the paper quality and thickness, the friction resistance received from the same friction member varies, and the separation performance also varies.

The friction member e disclosed in the above publication is disposed at a downstream position in the sheet feeding direction relatively far from a nip position where the sheet feeding roller c contacts and feeds out the cut sheet b. The cut sheet b which is fed out and abuts against the friction member e and is separated while buckling due to the frictional contact with the friction member e is provided with a large degree of freedom of deformation between the nip portion of the feed roller c and the friction member. When the friction member e passes through while being pushed away, the friction member e is inclined and easily escapes from the friction member e, so that the cut sheet b of any thickness is hardly subjected to residual deformation.

[0007] However, in such a conventional apparatus, the separation performance of the cut sheet b is unstable, and a sheet feeding defect or a double feed sometimes occurs. The friction member e of the conventional device is a cut sheet b
Since it only has a uniform friction surface in the friction contact direction of
When the leading end of the cut sheet b is curled downward, the portion receiving the feeding force by the paper feed roller c is almost set by being pressed by the paper feed roller c and being provided with straightness. Even if it is possible to rush into the friction surface of the friction member e at the same angle, most of the portion deviating from the paper feed roller c rushes into the friction surface of the friction member e while being curled or close thereto. In combination with the setting of the angle of the friction member e, the most part is further curled downward, and it is difficult to get over the friction member e.
A paper feed failure occurs in which the leading end of the cut sheet breaks into a distorted shape even if the paper is jammed or the paper can be fed, or a double feed state occurs in which the cut sheet b comes out only with the next cut sheet b. Such a phenomenon also occurs when the friction member e is provided at a position separated from the paper feed roller. In particular, the cut sheet b having a weak waist easily escapes from the friction member e. Tends to be unstable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet feeding device capable of reliably separating and feeding sheets one by one without residual deformation regardless of the type of cut sheet and the presence or absence of curl.

[0009]

In order to achieve the above object, according to the present invention, there is provided a sheet feeding device comprising: a sheet feeding roller which comes into contact with a stacked cut sheet from one side thereof and sequentially feeds the cut sheet; , The cantilever friction that separates the cut sheets one by one by frictional contact when the cut sheets extend from the other side of the loaded cut sheet to the cut sheet feeding path and come into contact with the leading end of the cut sheet and are pushed away. In the vicinity of the downstream side of the frictional member portion in the paper feeding direction at a position deviated from the paper feed roller, a cut-off member is provided which opposes the cut sheet portion abutting on the frictional member portion from above and restricts the floating of this portion. It is characterized by having.

In such a configuration, even if the portion of the leading end of the cut sheet that receives the feeding force of the feed roller is curled downward, the curl is pressed to correct the curl, and
Given the straightness, if there is an opposing friction member, it can smoothly penetrate the friction surface at almost the set angle, and at the part of the leading end of the cut sheet that is separated from the paper feed roller, and with the friction member Even if the opposing portion is curled downward, or if it is going to float locally due to escape from resistance when it enters the friction surface of the friction member and pushes it away, the feeding direction of the friction member The curl is corrected by the pressing member facing from above in the vicinity of the upstream side, curling is corrected, or floating is prevented, and the friction member can smoothly enter at almost the set angle. Irrespective of the presence or absence of curl, the paper can be reliably separated and fed one by one without giving any residual deformation.

When the friction member is provided at a substantially central position between the paper feed rollers disposed apart from each other, the cut sheet is fed by the paper feed rollers separated from each other with less skew, and the cut sheet is fed by each paper feed roller of the cut sheet. A substantially constant frictional force can be applied regardless of the type of cut sheet to the forced conveyance area where tension in the width direction is likely to be maintained, and it can be applied without exerting a biased external force at the center, so that separation performance and The skew prevention function is further improved.

If the roller is smaller than the outer diameter of the paper feed roller, the pressing member does not become bulky. Therefore, even when the friction member is provided near the paper feed roller exhibiting a high separation characteristic, the rotation of the paper feed roller is prevented. It is easy to install it near the friction member without the influence of the shaft, etc.If the roller is supported so that it can rotate freely, it will idle even if it comes in contact with the cut sheet fed out by the paper feed roller, so strong resistance will be exerted This does not cause any damage to the cut sheet, and there is no problem even if the cut sheet is lightly pressed from above, so that the curl forcing function and the lifting prevention function can be further improved by such pressure contact.

When the pressing member is a pad whose sliding surface is opposed to the cut sheet, the pad is less bulky, so that it is easier to install than a roller, and the sliding surface comes into contact with the cut sheet of the paper feed roller. If the cut sheet is located above the nip position, the cut sheet is only curled or only comes into contact with the cut sheet when it lifts up, so that the pad is unnecessary or excessive in the cut sheet. It is possible to prevent external force from being applied.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sheet feeding device according to an embodiment of the present invention.

(Embodiment 1) Embodiment 1 is shown in FIGS.
FIG. 4 illustrates a case of the sheet feeding device 1 that feeds a recording sheet by a copying machine as illustrated in FIG. The copying machine is of a digital type, and the scanning optical system 2 scans a document placed manually on a platen glass or automatically sent by a document feeder (not shown). The scanned image is formed on the image sensor 4 of the image reading unit 3 and converted into an electric image signal. This image signal is sent to the print head 5, and the print head 5 emits a laser beam 6 modulated by the image signal to the photosensitive drum 7 to perform image exposure.

The photosensitive drum 7 is located substantially at the center of the copying machine body 10, and its surface is uniformly charged by a charging brush 8 for the image exposure. The electrostatic latent image formed by the image exposure on the charged surface of the photosensitive drum 7 is developed by the developing unit 9 with a toner to become a visible image. This visible image is transferred to the cut sheet 11 sent from the paper feeding device 1 or the like by the transfer roller 12 or the like. The cut sheet 11 after the transfer is sent to a fixing device 13 and subjected to a fixing process. Thereafter, the cut sheet 11 is discharged to a discharge tray 15 directly or by a discharge roller 14.

In the main body 10 of the copying machine, a paper feeder 16 for feeding a fixed or regular cut sheet 11 is provided at the bottom or the like. The paper feeding device 16 includes a paper feeding cassette 17 that can be taken in and out, and a paper feeding cassette 1 that is mounted.
And a paper feed roller 18 in the copying machine main body 10 for feeding out the cut sheet 11 in the main body 7. The paper feeder 1 is shown as being used as a so-called manual paper feeder, and is provided so as to protrude from the side of the copier main body 10. Thus, a plurality of cut sheets 11 of paper quality and size not prepared in the copying machine main body 10 can be stacked as needed, or one sheet can be placed and fed.

The sheet feeding device 1 is used for a cut sheet 11 to be used.
3, the left and right side guides 22 provided on the paper feed tray 21 can be adjusted in position according to the width of the cut sheet 11 as shown in FIG. The left and right side guides 22 are interlocked by an interlocking gear 23 provided in the sheet feeding tray 21, and feed the cut sheets 11 of any size by so-called centering type positioning in which the center is adjusted to the same position.

Such a manual paper feeder 1 includes a postcard,
Various cut sheets 11 other than paper, for example, a resin sheet for an overhead projector, or a sheet of thinner paper than plain paper are often used. In some cases unexpected types of cut sheets 11
Is sometimes used.

The paper feeder 1 is an auxiliary device that is used less frequently, and a small and simple paper feed mechanism is desired, but a paper feed performance capable of handling various cut sheets 11 is required. In the first embodiment, as shown in FIG. 1 and FIG.
A simple separation method using a friction member 33 that hinders the advancement of the next lower cut sheet 11 that is to be double-fed to the outermost cut sheet 11 by the frictional contact at that time while being pushed away by the cut sheet 11 fed out In addition, a stable sheet feeding performance can be exhibited for various cut sheets 11. However,
The paper feeder of the present invention can be similarly applied to a usual paper feeder of a copying machine, and can also be applied to automatically feed a document. As described above, the present invention can be applied to a machine other than a copying machine.

The paper feed roller 31 of the paper feeder 1 is provided on the copying machine main body 10 side. Paper feed tray 2 of paper feeder 1
1 is a cut sheet 11 fed from the paper feeding device 16
And extends slightly obliquely upward from a base 36 having an outer guide 35 of a paper passing path 34 for receiving the photosensitive drum 7 toward the photosensitive drum 7, and the base 36 is hinged to the copying machine main body 10 at a side (not shown). The rotation of the paper feed tray 21 around the hinge connection part and the paper feed path 3
4 can be opened and closed for jam processing and the like.

The feed tray 21 has a push-up plate 26 pivotally supported at its rear end by a shaft 24 and urged upward by a spring 25.
1 is pressed against the paper feed roller 31 and the paper feed roller 31 is rotated, so that the outermost surface is
In the first embodiment, the uppermost cut sheet 11 can be fed and fed. The surface of the paper feed roller 31 is made of rubber such as EPDM, for example, and has an appropriate frictional force.
However, it is not limited to this.

The paper feed roller 31 has a substantially half-moon shape, and its notch faces the cut sheet 11 when paper is not fed, and its outer periphery is rotated once when paper is fed, and its outer periphery has no cut. The cut sheet 1 is sent out by contacting the sheet. When the sheet is not fed, the cam 31b, which rotates in synchronization with the sheet feeding roller 31, comes into contact with the cam follower 26a of the push-up plate 26 to push down the push-up plate 26 against the spring 25. 11 is largely separated from the paper feed roller 31, and only when the paper is not fed, the cut sheet 1
1 can be easily loaded or pulled out by hand.

When the paper feed roller 31 starts rotating at the time of paper feeding, the cam 31b is disengaged from the cam follower 26a at the same time or slightly later when the notch portion does not face the cut sheet 11, so that the push-up plate 26 becomes free. The cut sheet 11 is pressed against the outer diameter surface of the sheet feed roller 31 that has begun to be rotated by the bias of the spring 25 so that sheet feeding is performed.

The friction member 33 of the first embodiment is made of an elastic sheet material. When the cut sheet 11 is fed out by the feed roller 31, it is elastically bent and deformed and pushed away. The cut sheets 11 are separated one by one, and the sheet feed roller 31 contacts the uppermost surface of the stacked cut sheets 11 and feeds out the sheet. The cantilever support extends from the lowermost side of the sheet 11 to the feeding path of the cut sheet 11, and the lower part is fixed to the support wall 37 rising under the feeding path 30 by an appropriate method such as bonding or screwing. It is provided in a state.

Here, the mechanism of separation by the friction member 33 will be considered. The actual separating mechanism is a combination of the movement in which the cantilevered friction member 33 is pushed away by the cut sheet 11 and the partial buckling of the cut sheet 11. This will be described below in principle and qualitatively for the sake of simplicity.

Now, as shown in FIG. 6A, consider a condition in which the cut sheet 11 to be advanced by the force F receives a frictional force on the friction surface 33a of the friction member 33 and is balanced.
Mu _B coefficient of friction with respect to the cut sheet 11 of the friction surface 33a of the friction member 33, when the contact angle theta (fixed value in this case), when Fcosθ = μ _B · Fsinθ ...... (1), because commensurate, mu _B · tan .theta <1 (cut sheet 11 _{proceeds.) ...... (2) μ B} · tanθ ≧ 1 ( cut sheet 11 is stopped.) (3) the relationship is established. Shows the critical value of the contact angle θ traveling cut sheet 11 is slipped on the range of suitable friction coefficient mu _B in FIG. 6 (b).

In principle, from the above equations (2) and (3),
Whether the progression of the cut sheet 11 regardless of the force F, are to be understood as determined only by the friction coefficient mu _B and contact angle theta. Therefore, assuming that the friction coefficient μ _B does not change, the cut sheet 1
It is necessary to make a difference in the contact angle θ between the outermost cut sheet 11 and the next lower cut sheet 11 with respect to the friction surface 33a in order to loosen 1. That is, separation by the friction member 33 means to drive the contact angle θ of only the outermost cut sheet 11 from the stop area of the cut sheet 11 to the advancing area.

However, usually, the outermost surface of the cut sheet 11 is very close to the lowermost one, and the cut sheet 11 is in close contact with the outermost surface. It is considered that there is almost no difference in the angle θ.

While the friction member 33 is pushed away by the cut sheet 11 fed by the paper feed roller 31, the frictional contact at that time causes the outermost cut sheet 1
1 is made to buckle more than the cut sheet 11 below the next order, so that the contact angle θ of the cut sheet 11 on the outermost surface becomes much smaller than the contact angle θ of the cut sheet 11 below the next order. Then, the cut sheets 11 are separated one by one, and only the outermost cut sheet 11 passes therethrough, and the cut sheets 11 at the next and lower positions are stopped to prevent double feeding.

In practice, however, the cut sheet 11 is easy to bend depending on the paper quality and thickness, that is, the stiffness is different, and the cut sheet 11 fed out by the paper feed roller 31 is a friction member 33. Therefore, it is difficult to be surely separated and handled without being subjected to residual deformation.

In the first embodiment, the friction member 33 is made of, for example, a polycarbonate film, and has a thickness of about 200 μm, which is a commercially available product, so that a suitable restoring force for loosening the cut sheet 11 can be obtained. The friction surface 33a has a necessary friction coefficient obtained by coating the surface of the polycarbonate film with a material having a large friction coefficient such as urethane resin. The coating is preferably silk screen printed. The heat treatment was performed at about 200 mesh at 80 ° C. for 30 minutes. Friction surface 33a
It is preferable that the material has a static friction coefficient of about 1.0 to 1.5 with respect to general high-quality paper. Further, it is preferable to set the angle between the friction surface 33a and the outermost cut sheet 11 to 90 degrees to 120 degrees. Further, a friction member 33 is provided at a position deviated from the paper feed roller 31 and, near the downstream side in the paper feeding direction, opposes the cut sheet portion 11a abutting on the friction member 33 from above and lifts this portion 11a. Is provided.

Thus, even if the portion of the leading end of the cut sheet 11 which receives the feeding force of the feed roller 31 is curled downward as shown by the imaginary line in FIG. In addition to being corrected as shown by (1) and (2), straightness is given, so that there is a friction member facing (not provided in the present embodiment, but may be provided).

It is possible to smoothly penetrate the friction surface at substantially the set angle, and a portion of the leading end of the cut sheet 11 which is separated from the feed roller 31 and the friction member 33
1 may be curled downward as shown by the imaginary line in FIG.
2B, even if it tries to float locally as shown by the phantom line in FIG. The curl is corrected as shown by the dashed line in FIG. 2 by the opposing pressing member 61, and the curl is corrected or the floating is prevented, so that the friction member 33 can smoothly enter at substantially the set angle. Regardless of the type of the cut sheet 11 and the presence or absence of curl, the sheet can be reliably separated and fed stably without giving any residual deformation.

In particular, in the first embodiment, the friction member 33 is provided at a substantially central position between a pair of paper feed rollers 31 which are spaced apart as shown in FIG. As a result, while the cut sheet 11 is fed out with less skew by the respective feed rollers 31, the type of the cut sheet 11 is set differently in the forced conveyance area where the tension in the width direction is easily maintained by the respective feed rollers 31 of the cut sheet 11. A substantially constant frictional force can be exerted without exerting an external force biased substantially at the center, so that the separating performance and the skew prevention function are further improved.

Since the sheet feeding device 1 of the first embodiment is of a type that performs positioning by the center alignment method, the friction member 33 is located at the center of the cut sheets 11 of various sizes, Are more symmetrical, so it is more convenient to ensure that the paper feeding and separation characteristics work evenly. However, if there is a pair of left and right feed rollers 31, it is difficult to cause skew even if they work at a slightly skewed position of the cut sheet 11, so the combination of the feed roller 31 and the friction member 33 of the first embodiment is a one-sided combination. It can also be applied as it is to a type paper feeder. In addition, three or more paper feed rollers 31 may be provided.
The friction member 31 may be provided in some places, but also in these cases, it is effective to provide the pressing member 61.
When the friction member 33 is provided for the entire width of the cut sheet 11, the holding member 61 is arranged so as to face almost the entire area of the friction member 33 which is separated from the sheet feeding roller 31 or a plurality of dispersed positions in the entire area. Preferably, it is provided.

Further, the holding member 61 is used for the cut sheet 1.
1 is a pad 71 having a sliding surface 71a opposed thereto. The pad 71 is not bulky with a plate material, and is bent as shown in FIG.
It is easy to install even when the space between 1c and the cut sheet 11 is narrow. In addition, since the sliding surface 71a is located above the nip position N of the sheet feeding roller 31 in contact with the cut sheet 11, the cut sheet 11 is forced or restricted only when the cut sheet 11 is curled or floats. Therefore, it is possible to prevent the pad 71 from applying unnecessary or excessive external force to the cut sheet 11.

Either of these forms can be applied to a friction member made of a rigid body to which a restoring force is applied by a spring, and the function and effect to be performed are not changed.

Further, in the first embodiment, the friction member 33
As shown in FIG. 1, the friction surface 33a is located inside the outer diameter of the paper feed roller 31, so that the paper feed roller 31 comes into contact with the cut sheet 11 and feeds from the nip position N. The distance of the friction member 33 to the friction surface 33a is extremely small as compared with the above-described conventional example. Therefore, the cut sheet 11 between the nip position N and the friction surface 33a is not required.
Of the friction surface 33
Since the sheet is easily received by the friction of a, the sheet can be easily separated, the separating performance can be improved, and high-speed sheet feeding can be performed. The setting of the angle of the friction member 33 has provided a good result.

One cut sheet 11 is fed out by one rotation of the paper feed roller 31, and the rear end of the cut sheet 11 is moved to the nip position N.
Is released, the friction member 33 is released from the pressing by the cut sheet 11 fed and becomes free, so that it returns to the original state. At this time, the cut sheet 1 fed
The cut sheet 11 below the second order that was to be multi-fed to 1,
It is possible to prevent the friction member 33 from being pushed back to the original position by the returning force, and to prevent the next sheet feeding from being disturbed, and the angle setting of the friction member 33 can be easily performed. Adapted and convenient.

Further, when the base 36 of the sheet feeding device 1 is opened to open the sheet passing path 34, the friction member 33 is drawn out by passing through the rotating shaft 31c of the sheet feeding device roller 31 forward. Next, when the base 36 is closed, the friction member 33 is moved to the position shown in FIG.
As shown by an imaginary line in FIG. 7, the robot cannot be returned to a normal position by being caught on the rotating shaft 31c. However, at the initial stage when the paper feed roller 31 is rotated for the paper feeder, the protrusion 31a provided on the rotating shaft 31c is hooked on the tip of the friction member 33 at the virtual line position and pushes it to the position shown by the solid line. Since the friction member 33 is automatically returned to an appropriate position, there is no problem.

(Embodiment 2) In Embodiment 2, as shown in FIG. 5, the holding member 61 is a roller 72 having an outer diameter smaller than that of the sheet feeding roller 31. The roller 72 is rotatably supported by a shaft 73 at the tip of a lever 74, and the lever 74 has a base supported by the copier body 10 by a shaft 75.

As a result, since the roller 72 does not become small and bulky, even when the friction member 33 is provided in the vicinity of the feed roller 31 exhibiting high separation characteristics, the friction member 33 is not affected by the rotation shaft 31c of the feed roller 31 and the like. If the roller 72 is rotatably supported so as to rotate freely even if it comes into contact with the cut sheet 11 fed out by the feed roller 31, the cut sheet 11 exerts a strong resistance, Without damaging the
Since there is no problem even if the cut sheet 11 is lightly pressed from above, it is supported by the lever 74 or the like as in the second embodiment so that the cut sheet 11 is pressed by its own weight to further improve the curl forcing function and the lifting prevention function. Can be. However, the roller 74 can be lightly urged by a spring to press the roller 72 against the cut sheet 11.

Since other structures, functions and effects are the same as those of the second embodiment, common members and portions are denoted by the same reference numerals, and overlapping illustration and description are omitted.

In each of the first and second embodiments, only the paper feeder of the top-up type is shown. However, the present invention is not limited to this. The present invention can be similarly applied to such a device.

[0046]

According to the present invention, even if a portion of the leading end of the cut sheet which receives the feeding force of the feed roller is curled downward, the curl can be corrected and straightness can be given. Even if the leading end of the cut sheet that is separated from the paper feed roller and the part facing the friction member curls downward, or if it tries to float locally due to escape from the friction member, the curl By straightening or preventing the floating, the cut sheet smoothly enters the friction member at almost the set angle, and one sheet without giving any residual deformation regardless of the type of cut sheet and the presence or absence of curl. Each sheet can be reliably separated and fed stably.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main part of a sheet feeding device according to a first embodiment of the present invention.

FIGS. 2A and 2B are perspective views showing a sheet feeding state of a sheet feeding device. FIG. 2A shows a sheet feeding device of FIG. 1 having a holding member, and FIG. This is the case of a paper device.

FIG. 3 is a cross-sectional view of substantially the entire sheet feeding device of FIG. 1;

FIG. 4 is a schematic configuration diagram of a copier including the sheet feeding device of FIG. 1;

FIG. 5 is a cross-sectional view illustrating a main part of a sheet feeding device according to a second embodiment of the present invention.

FIGS. 6A and 6B are explanatory views illustrating the principle of separation of cut sheets by a friction member to which the present invention is applied, wherein FIG.
(B) is a graph showing boundary conditions for stopping and advancing when the cut sheet comes into contact with the friction member.

FIG. 7 is a cross-sectional view of a main part showing a conventional sheet feeding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper feeder 10 Copier main body 11 Cut sheet 21 Paper feed tray 26 Push-up plate 31 Paper feed roller 30 Feeding path 33 Friction member 33a Friction surface 61 Suppression member 71 Pad 71a Sliding surface 72 Roller 73 Shaft 74 Lever

Claims (4)

[Claims] A sheet feed roller which comes into contact with the stacked cut sheets from one side thereof and sequentially feeds the cut sheets; and a cut sheet which extends from the other side of the stacked cut sheets to a cut sheet feeding path and feeds the cut sheets. In a sheet feeding device having a cantilevered friction member that separates cut sheets one by one by frictional contact when the sheet is pushed and displaced in contact with a front end portion, feeding of a friction member portion at a position separated from a sheet feeding roller is performed. A sheet feeder comprising a cut-off member which is opposed to the cut sheet portion in contact with the friction member portion from above in the vicinity of the downstream side in the direction and restricts floating of the cut sheet portion. 2. The paper feeding device according to claim 1, wherein a friction member is provided at a substantially central position between the paper feeding rollers arranged apart from each other. 3. The sheet feeding device according to claim 1, wherein the pressing member is a roller smaller than the outer diameter of the sheet feeding roller and rotatably supported so as to be freely rotatable. 4. The holding member according to claim 1, wherein the pressing member is a pad having a sliding surface facing the cut sheet, and the sliding surface is located above a nip position of the sheet feeding roller in contact with the cut sheet. A sheet feeding device according to any one of the preceding claims.