JPH08295439A - Paper feeder - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a paper feeding device that can smoothly and smoothly correct and convey a paper sheet conveyed to a registration roller in a state inclined with respect to the conveyance direction. With the goal. A transport roller 29 for transporting a paper sheet and a front end of the paper sheet transported by the transport roller at a position shorter than the length of the paper sheet on the downstream side in the transport direction with respect to the transport roller are stopped. Registration rollers 30 and 31 that receive the sheet with the sheet and regulate the movement of the paper sheet, and a guide 2 that is provided between the conveyance roller and the registration roller and that guides the paper sheet conveyed from the conveyance roller to the registration roller.
In this guide, the portion of the guide where the paper sheet that has been curled up by the movement of the registration rollers is in contact with is higher in the portion located in the central portion in the width direction than in other portions. Is characterized by.

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 having a registration roller.

[0002]

2. Description of the Related Art In a facsimile machine, for example, a paper sheet, which is a cut-sheet type recording sheet for recording a received image signal, is skew-corrected by a registration roller and aligned with an image to be fed to a recording section. Some are equipped with devices.

A conventional paper feeding device in this facsimile apparatus will be described with reference to FIG.

In FIG. 6, 1 is a cassette for accommodating and stacking a large number of paper sheets P, 2 is a recording unit provided on the upper side of the cassette 1, and 3 is a resist provided between the cassette 1 and the recording unit 2. Be a guide. The resist guide 3 has an L-shape in which a portion of the cassette 1 which stands upright above the paper sheet feeding end and a portion which extends horizontally from the vertical portion toward the recording portion 2 are combined.

On the inner surface of the resist guide 3, as shown in FIG. 7, a plurality of ribs 4 continuously extending in an L shape along the vertical and horizontal portions of the resist guide 3 are arranged in the width direction of the resist guide 3. Is formed. In each rib 4, a portion located at an intersection where the vertical portion and the horizontal portion of the resist guide 3 intersect is bent in an arc shape. Each of these ribs 4 guides the conveyance of the paper sheet P.
As shown in, the heights from the vertical and horizontal portions are set to the same size. In the resist guide 3, the portion where the paper sheet P slides in contact is formed with a plurality of ribs 4, so that the frictional resistance acting on the paper sheet is smaller than when the portion where the paper sheet P slides in contact is flat. This is because.

Reference numeral 5 denotes an L-shaped recording guide provided inside the resist guide 3, and the paper sheet guide 5 is combined with the resist guide 3 to form a paper sheet conveying passage including a horizontal portion, an arc-shaped curved portion and a horizontal portion. Is formed. The length of this paper sheet conveying path is shorter than the length of the paper sheet P.

Reference numeral 6 denotes a pickup roller and a conveyance roller provided below the lower ends of the vertical portions of the registration guide 3 and the paper sheet guide 5. Reference numerals 8 and 9 denote a pair of registration rollers, which are the registration guide 3 and the paper sheet guide 5.
They are arranged vertically on the front side of the horizontal part. Here, the pair of registration rollers 8 and 9 are provided at a position shorter than the length of the paper sheet P on the downstream side in the transport direction with respect to the transport rollers. Reference numeral 10 is a friction member that faces and contacts the transport roller 7.

The cassette 1, the guides 3, 5, the rollers 6 to 9 and the friction member 10 constitute a paper feeding device. The operation of transporting the paper sheet P to the recording unit 2 in the paper feeding device thus configured will be described.

The uppermost paper sheet P contained and stacked in the cassette 1 is delivered by the rotating pickup roller 6, passes between the rotating conveying roller 7 and the friction member 10, and is separated from other paper sheets. It is sent to the vertical portion of the transport path formed by the resist guide 3 and the paper sheet guide 5. The paper sheet P is conveyed by the rotation of the conveying roller 7 as shown by the phantom line in the drawing and rises, and slides in contact with a part of the arc-shaped curved portion of the rib 4 formed on the resist guide 3 and is oriented in the horizontal direction. It is converted and is transported in the horizontal portion of the transport path formed by the resist guide 3 and the paper sheet guide 5.

Then, the front end of the paper sheet P conveyed through the conveyance path of the paper sheet P contacts the contact portion of the registration rollers 8 and 9. Here, the rotation of the registration rollers 8 and 9 is stopped. Therefore, the paper sheet P is prevented from being conveyed (advanced) by the registration rollers 8 and 9. However, on the other hand, the paper sheet P is given a carrying (advancing) force by the carrying roller 7. Therefore, the paper sheet P comes to warp at the bent portion in the transport path.

Then, when the conveyance of the paper sheet P by the conveyance rollers 7 progresses further, the warp of the paper sheet P further progresses, and the warped portion comes into contact with the curved portion of the rib 4 of the resist guide 3 with pressure. Furthermore, the transport roller 7
As the conveyance of the paper sheet P by the process proceeds, the front end of the paper sheet P is registered along the longitudinal direction of the rib 4 at the portion of the paper sheet P that is in contact with the bent portion of the rib 4 of the resist guide 3 as shown in FIG. A force F pressing the rollers 8 and 9 acts.

Here, as shown in FIG. 8, when the paper sheet P is conveyed (skewed) from the conveyance roller 7 with an inclination with respect to the conveyance direction, the paper sheet P is skewed according to the inclination direction.
One corner portion at the front end of is positioned on the front side in the transport direction by the other corner portion and comes into contact with the registration rollers 8 and 9 first.

Then, as described above, the resist guide 3
The force F acting on the portion of the paper sheet P that is in contact with the bent portion of the rib 4 (pressing the front end of the paper sheet P against the registration rollers 8 and 9 along the longitudinal direction of the rib 4) causes the paper sheet P to A rotation moment M is generated that attempts to rotate the one front end corner portion that is in contact with the registration rollers 8 and 9 in a direction to approach the other front end corner portion to the registration rollers 8 and 9.

As a result, the paper sheet P is rotated around one of the front end corners that are in contact with the registration rollers 8 and 9, and the other front end corner is in contact with the registration rollers 8 and 9. For this reason, the skewed paper sheet P that has been conveyed while being inclined with respect to the conveying direction is skew-corrected and becomes parallel to the conveying direction.

After that, the registration rollers 8 and 9 start to rotate at the timing when the front edge of the image and the front edge of the paper sheet P meet. As a result, the paper sheet P is conveyed toward the recording unit 2 by the rotating registration rollers 8 and 9, and recording is performed in the recording unit 2.

[0016]

However, such a conventional sheet feeding device has the following problems. That is, as shown in FIG. 7, the ribs 4 formed on the resist guide 3 are set to have uniform heights. Therefore, as shown in FIG. 8, the front end of the paper sheet P is moved to the registration rollers 8 and 9 along the longitudinal direction of each rib 4, which is generated in the portion of the paper sheet P that is in contact with the bent portion of the rib 4 of the resist guide 3. The pressing force F has the same magnitude at each position in the width direction of the paper sheet P. That is, the registration rollers 8 and 9 are irrespective of the widthwise central portion and the left and right side portions of the paper sheet P.
A force F of the same magnitude acts on the.

Therefore, the amount by which the conveyance roller 7 presses the widthwise central portion of the paper sheet P against the registration rollers 8 and 9, and the conveyance roller 7 presses both widthwise sides of the paper sheet P against the registration rollers 8 and 9. The amount attached is the same size.

Therefore, when the paper sheet P is conveyed from the conveying roller 7 in an inclined state with respect to the conveying direction, the paper sheet P is centered on one of the front end corners which are in contact with the registration rollers 8 and 9. The rotation moment M that tries to rotate the other front end corner toward the registration rollers 8 and 9 is less likely to be generated. Then, the paper sheet P does not rotate, advances in an oblique state, is pressed against the registration rollers 8 and 9, and wrinkles occur, which often causes the recording unit 2 to be unable to record. It was

The present invention has been made in view of the above circumstances, and is capable of smoothly and smoothly correcting and feeding a paper sheet conveyed to a registration roller in an inclined state with respect to the conveying direction. It is intended to provide.

[0020]

In order to achieve the above-mentioned object, a paper feeding device of the present invention comprises a carrying roller for carrying a paper sheet and a length of the paper sheet on the downstream side in the carrying direction with respect to the carrying roller. Between a registration roller, which is provided at a short distance and regulates the movement of the paper sheet by receiving the front end of the paper sheet conveyed by the conveyance roller in a stopped state, and between the conveyance roller and the registration roller And a guide for guiding the paper sheet conveyed from the conveyance roller to the registration roller, where the guide roller is restricted in movement by the registration roller, and the portion where the paper sheet warped up comes into contact with It is characterized in that the portion located in the central portion in the width direction is higher than other portions.

[0021]

According to the above construction, the central portion in the width direction of the portion of the guide where the paper sheet curled up due to its movement being restricted by the registration roller contacts is higher than the other portions.

For this reason, when the front end of the paper sheet conveyed through the paper sheet conveyance path comes into contact with the stopped registration roller and the conveyance of the paper sheet by the conveyance rollers progresses, the rebound portion of the paper sheet becomes It contacts the highest part in the center of the guide in the width direction. That is,
Only the central portion in the width direction of the paper sheet contacts the guide. As a result, a force for pressing the front end of the paper sheet against the registration roller acts along the longitudinal direction of the paper sheet on the central portion of the paper sheet that is in contact with only the central portion of the guide.

Then, when the paper sheet is conveyed (skewed) from the conveying roller in an inclined direction with respect to the conveying direction, one corner portion at the front end of the paper sheet is moved by the other corner portion in accordance with the inclination direction. It is located on the front side in the transport direction and comes into contact with the registration roller first. Here, a force for pressing the front end of the paper sheet against the registration roller acts on the central portion of the paper sheet that is in contact with only the central portion of the guide.

Therefore, the paper sheet comes into contact with the registration roller due to the combination of the front end corner portion of the paper sheet in contact with the registration roller and the force acting along the longitudinal direction at the widthwise central portion of the paper sheet. The rotational moment directed toward the registration roller about the front edge of the paper sheet is acting reliably. Therefore, the paper sheet is easily rotated toward the registration roller about the front edge corner of the paper sheet which is in contact with the registration roller, and the entire width direction of the front end is uniformly pressed against the registration roller.

As a result, the paper sheet is turned to a direction parallel to the conveying direction, and the skew is corrected. The skew correction of the paper sheet is reasonably, surely and lightly performed by the force acting along the longitudinal direction on the central portion in the width direction of the paper sheet. For this reason, it is difficult for the paper sheet to rotate in a direction parallel to the conveyance direction, the cue correction is not performed, and the paper sheet is forcibly pressed against the registration roller to cause wrinkles or tears. It is possible to prevent the occurrence of accidents.

[0026]

Embodiments of the present invention will be described with reference to FIGS.

This embodiment is applied to a paper feeding device that conveys a paper sheet, which is a recording paper, to a recording unit in order to record an image signal received by a facsimile apparatus.

In FIG. 1, 21 is a cassette for accommodating and stacking a large number of paper sheets P, and 22 is an electrophotographic recording unit provided on the upper side of the cassette 21. The recording unit 22 has a photosensitive drum 23 and a transfer roller 24, which are rotated in the direction of the arrow in the drawing by a rotating device (not shown). A toner image is formed on the outer peripheral surface of the photosensitive drum 23. The transfer roller 24 serves to transfer the toner image on the photosensitive drum 23 to the paper sheet P. Then, the paper sheet P is transferred to the photosensitive drum 23 and the transfer roller 24.
When the sheet passes through the space between and, the toner image on the photosensitive drum 23 is transferred to the paper sheet P for recording.

Reference numeral 25 is a resist guide provided between the cassette 21 and the recording section 22. Registration guide 25
Is an L-shape in which a plate-shaped portion 25a that stands vertically above the paper sheet feeding end in the cassette 21 and a plate-shaped portion 25b that extends horizontally from the vertical portion 25a toward the recording portion 22 are combined. It is an eggplant.

A plurality of ribs 26 are formed in a portion of the resist guide 25 which faces a recording paper guide 27, which will be described later, as shown in FIG. As shown in FIG. 1, the plurality of ribs 26 continuously extend in an L shape along the vertical portion 25a and the horizontal portion 25a of the resist guide 25, and are formed at intervals in the width direction of the resist guide 25. There is. The vertical portion 25a of the resist guide in each rib 26
The portion located at the intersection where the horizontal portion 25b and the horizontal portion 25b intersect has an arc shape.

Each of these ribs 26 guides the paper sheet P when the paper sheet P is conveyed in a paper sheet conveying passage, which will be described later. The ribs 26 located in the vertical portion 25a of the registration guide 25 and the horizontal portion. The portions of the ribs 26 located at 25b are set to the same height as in FIG.

Further, in each rib 26, the portion located at the intersection where the vertical portion 25a and the horizontal portion 25b of the resist guide intersect is bent in an arc shape. The curved portion of each rib 26 guides the paper sheet P so as to change its direction when it is conveyed in a conveyance path described later, and is registered when the recording paper P is conveyed in the paper sheet conveyance path. Paper sheet P hitting rollers 30 and 31
Is a portion to which the warped portion of the paper sheet P comes into contact.

As shown in FIGS. 2 and 3, the longitudinal middle portion of each rib 26 has a rib 26a located at the center in the width direction of the paper sheet, which is higher than the other portions. In this embodiment, as shown in FIG. 3, the rib 26a located at the center in the seat width direction is the highest portion, and the heights of the ribs 26 arranged on the left and right side portions of the highest rib 26a are close to the left and right side edges. The height gradually decreases, and it is inclined like the slope of the roof as a whole. Here, the height of the highest rib 26a is such that the recording paper P is at the registration roller 3
It is set in consideration of the backward rising state when the paper sheet P hits 0, 31 and goes up. In this way, the ribs 26 are arranged on the left and right sides of the ribs 2 from the highest rib 26a.
If the height of 6 is gradually decreased toward the left and right edges, the paper sheet P does not become unreasonable when the paper sheet P contacts the ribs 26 other than the highest rib 26a. Contact.

Further, in this embodiment, the ribs 26 are formed such that the heights of the ribs 26 lined up on the left and right sides from the highest rib 26a are sequentially lowered, but the ribs 26 other than the highest rib 26a are the highest ribs. It may be set to a uniform height lower than 26a. The highest rib 26a is not limited to a single rib, but a plurality of ribs 26 existing at the center of the resist guide 25 in the width direction may be formed as the highest rib 26a.

Further, in this embodiment, the ribs 26 located at the vertical and horizontal portions of the resist guide 25 can be formed in the same shape as the bending. However, it is preferable that the ribs 26 located on the vertical portion 25a and the horizontal portion 25b of the resist guide 25 have a uniform height from the viewpoint of stably transporting the paper sheet P.

27 is a vertical portion 25a of the resist guide 25.
And an L-shaped paper sheet guide provided inside the horizontal portion 25b. The paper sheet guide 27 is combined with the resist guide 25 to form a paper sheet conveying passage having a vertical portion, a curved portion and a horizontal portion. It is a thing. The length of the paper sheet transport passage is shorter than the length of the paper sheet P.

Reference numeral 28 is a pickup roller provided on the upper side of the cassette 21, and this picks up the paper sheet P stacked on the cassette 21. A conveying roller 29 is provided below the lower ends of the vertical portions of the resist guide and the paper sheet guide 27. These rollers 28, 29
Is driven to rotate in the arrow direction shown in FIG. 1 by a rotating device (not shown).

Numerals 30 and 31 are a pair of registration rollers, which are vertically arranged in front of the front ends of the horizontal portions of the registration guide 25 and the paper sheet guide 27.
The registration roller 30 is rotated by a rotating device (not shown). The registration roller 31 is rotated by the registration guide 25 depending on the registration roller 30. The pair of registration rollers 30 and 31 is provided at a position that is shorter than the length of the paper sheet P on the downstream side in the transport direction with respect to the transport roller 27. Reference numeral 34 is a friction member that faces and contacts the transport roller 7.

Further, 35 is a paper sheet detection sensor, which is provided at a vertical portion in the paper sheet conveying path. In the paper sheet detection sensor 35, for example, a swingable inspection element 36 is positioned in the paper sheet conveyance path, and the paper sheet P conveyed in the vertical portion of the paper sheet conveyance path moves the inspection element 36 to move the inspection element 36. It is to detect passage. The detection signal output from the detection sensor 35 is sent to a rotation drive control circuit (not shown), which rotates the registration roller 3
Stop rotation of 0.

Then, the cassette 21, the guides 25, 2
7, the rollers 28 to 31 and the friction member 34 constitute a paper feeding device. The operation of transporting the paper sheet P to the recording unit in the paper feeding device thus configured will be described.

The uppermost paper sheet P contained and stacked in the cassette 21 is fed out by the rotating pickup roller 28, and is separated from the other paper sheets P by passing between the rotating conveying roller 29 and the friction member 34. Is fed to the vertical portion of the conveyance path formed by the registration guide 25 and the paper sheet guide 26, and is conveyed through the vertical portion of the conveyance path sandwiched between the registration guide 25 and the paper sheet guide 26 by the rotation of the conveyance roller 29. Be raised.

The paper sheet detection sensor 35 detects the paper sheet P conveyed in the vertical portion of the conveying path, and the rotation drive control circuit which receives the detection signal detects the registration rollers 30 and 3.
Stop rotation of 1.

The paper sheet P conveyed up in the vertical portion of the conveying path reaches the arc-shaped curved portion of the rib 26 of the resist guide 25, is guided by the arc-shaped curved portion and changes its direction in the horizontal direction, and the resist guide is guided. 25 and the registration guide 25 of the paper sheet 21 are conveyed in a horizontal portion of a conveyance path.

Then, the front end of the paper sheet P conveyed through the conveyance path of the paper sheet P contacts the registration rollers 30 and 31. Here, since the rotation of the registration rollers 30 and 31 is stopped, the paper sheet P is transferred to the registration rollers 30 and 3.
1 blocks forward movement. On the other hand, the paper sheet P is still being conveyed by the conveying roller 7. For this reason, the paper sheet P comes to rise up.

Then, the paper sheet P by the conveying roller 29
As the conveyance of the sheet advances, the warp of the paper sheet P further progresses, and the warped portion comes into contact with the bent portion of the rib 26 of the resist guide 25. Further, when the conveyance of the paper sheet P by the conveyance rollers 29 progresses, the ribs 26 located at the corners of the registration guide 25 as shown in FIGS. 4 and 5.
A force F1 that presses the front end of the paper sheet P against the registration rollers 30 and 31 along the longitudinal direction of the ribs 26 acts on the portion of the paper sheet P that is in contact with.

A description will be added. The front end of the paper sheet P conveyed in the conveyance path of the paper sheet P comes into contact with the contact portion of the registration rollers 30 and 31 that are stopped, and then the conveyance roller 29.
When the conveyance of the paper sheet P by the process proceeds, the warped portion of the paper sheet P comes into contact with the highest rib 26a located at the center portion in the width direction at the bent portion of the rib 26. That is, only the central portion in the width direction of the paper sheet P contacts the highest rib 26 a of the resist guide 25. As a result, the paper sheet P contacting only the highest rib 26a at the center of the resist guide 25
The front end of the paper sheet P on the registration roller 30,
The force F1 pressing against 31 acts along the longitudinal direction of the paper sheet.

Then, when the paper sheet P is conveyed (skewed) from the conveying roller 29 in a state of being inclined with respect to the conveying direction, one corner portion at the front end of the paper sheet P is different from the other depending on the direction of inclination. Is positioned on the front side in the conveying direction by the corner portions of the first and second contact points and come into contact with the registration rollers 30 and 31 first. Here, a force F1 that presses the front end of the paper sheet P against the registration rollers 30 and 31 acts on the central portion of the paper sheet P that is in contact only with the central portion of the registration guide 25.

Therefore, as shown in FIG. 4 and FIG. 5, it acts on the front end corners of the paper sheet P in contact with the registration rollers 30 and 31 and the widthwise center of the paper sheet P along the longitudinal direction. Due to the combination with the force, the rotation moment M toward the registration rollers 30 and 31 is surely applied to the paper sheet P around the front end corner portion of the paper sheet P that is in contact with the registration rollers 30 and 31. Therefore, the paper sheet P is easily rotated toward the registration rollers 30 and 31 around the front end corners of the paper sheet P that is in contact with the registration rollers 30 and 31, and the entire front end in the width direction is registered. , 31 are evenly pressed.

As a result, the paper sheet P is turned to a direction parallel to the conveying direction, and the skew is corrected. The skew correction of the paper sheet P is reasonably, surely and lightly performed by the force acting along the longitudinal direction on the central portion in the width direction of the paper sheet P. For this reason, it is difficult for the paper sheet P to rotate in a direction parallel to the conveyance direction, skew correction is not performed, and the paper sheet P is forcibly registered.
It is possible to prevent the occurrence of an accident in which wrinkles are generated by being forcedly pressed against 0 and 31 and are torn, which impairs recording in the recording unit 2. After the skew correction, a slight pressing force F2 acts on both sides of the paper sheet P.

After that, the rotation of the registration rollers 30 and 31 is started at the timing when the front edge of the image and the front edge of the paper sheet P meet. As a result, the paper sheet P is conveyed toward the recording unit 22 by the rotating registration rollers 30 and 31.

The paper sheet P is conveyed between the photosensitive drum 23 and the transfer roller 24 in the recording section 22.
In this process, the image formed on the photoconductor drum 23 is transferred to the paper sheet P.

The present invention is not limited to the embodiments described above,
Various modifications can be implemented. For example, in the embodiment, the portion of the resist guide with which the paper sheet slides is formed by arranging a plurality of ribs, but the invention is not limited to this, and the entire portion of the paper slide with which the paper sheet slides may be formed as a flat surface. In this case, the central portion of the portion where the paper sheet is in sliding contact is made higher than the other portions.

In the above-described embodiment, the present invention is applied to the case of feeding the paper sheet in the facsimile machine.
The present invention is not limited to this, and can be widely applied to a document conveying unit in a facsimile machine.

[0054]

As described above, according to the paper feeding device of the present invention, in the guide for guiding the paper sheet conveyed from the conveying roller to the registration roller, the movement is restricted by the registration roller and the paper is raised. The central portion in the width direction of the portion where the paper sheet comes into contact is formed higher than the other portions.

For this reason, when the paper sheet conveyed through the paper sheet conveyance path abuts against the registration rollers which are not rotating and recoils up, the warped portion of the paper sheet is centered in the width direction of the guide. Touch the highest part of. As a result, in the center of the paper sheet that is in contact only with the center of the guide,
The force that presses the front edge of the paper sheet against the registration roller acts.

Then, when the paper sheet is conveyed from the conveyance roller in an oblique state with respect to the conveyance direction, it acts on the corner portion of the paper sheet which is in contact with the registration roller and the widthwise central portion of the paper sheet. Due to the combination with the force, the rotational moment toward the registration roller about the front edge corner of the paper sheet in contact with the registration roller reliably acts on the paper sheet. Therefore, the paper sheet is easily rotated toward the registration roller about the front edge corner of the paper sheet that is in contact with the registration roller, and the entire width direction of the front end is uniformly pressed against the registration roller.

As a result, the skew of the paper sheet can be easily and surely corrected by changing the direction of the paper sheet in a direction parallel to the conveying direction. The skew correction of the paper sheet is reasonably, surely and lightly performed by the force acting along the longitudinal direction on the central portion in the width direction of the paper sheet. For this reason, it is difficult for the paper sheet to rotate in a direction parallel to the conveyance direction, the cue correction is not performed, and the paper sheet is forcibly pressed against the registration roller to cause wrinkles or tears. It is possible to prevent the occurrence of accidents.

[Brief description of drawings]

FIG. 1 is a sectional view showing a sheet feeding device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a bent portion of a resist guide in the embodiment.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a diagram showing a state in which a force is applied to a paper sheet in the embodiment.

FIG. 5 is a diagram showing a state in which a force is applied to a paper sheet in the embodiment.

FIG. 6 is a cross-sectional view showing a conventional sheet feeding device.

FIG. 7 is a cross-sectional view showing a bent portion of a resist guide in the sheet feeding device of the conventional example.

FIG. 8 is a diagram showing a state in which force is applied to a paper sheet in the paper feeding device of the embodiment.

[Explanation of symbols]

 21 ... Cassette, 22 ... Recording part, 25 ... Registration guide, 26 ... Rib, 26a ... Highest rib, 27 ... Recording paper guide, 28 ... Pickup roller, 29 ... Conveying roller, 30 ... Registration roller, 31 ... Registration roller, P … Paper sheets.

Claims (1)

[Claims] 1. A transport roller for transporting a paper sheet, and a paper roller provided at a position shorter than the length of the paper sheet on the downstream side in the transport direction with respect to the transport roller and transported by the transport roller. A registration roller that receives the front end in a stopped state and regulates the movement of the paper sheet,
A guide that is provided between the conveyance roller and the registration roller and guides the paper sheet conveyed from the conveyance roller to the registration roller. The sheet feeding device is characterized in that a portion located in the center portion in the width direction is higher than a portion where the paper sheet comes into contact with the other portions.