JP3438766B2 - Paper feeder - Google Patents

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 example, the present invention relates to a paper feeding device that feeds paper to an image forming apparatus such as a printer, a facsimile, and a copying machine.

[0002]

2. Description of the Related Art As a conventional sheet feeding device, for example, FIG.
Those shown in (a) are known (Japanese Patent Laid-Open No. 58-58-58).
No. 65684).

This paper feeding device is provided at both ends of a common shaft 4, and drives both sides Pa of the paper P (see FIG. 2B) to feed the paper P. The sprockets 2 serve as a pair of paper feeding means. Equipped with 3.

According to the sheet feeding device having such a structure, the sheet P receives the conveying force only on the both side portions Pa thereof. Therefore, if no measures are taken, as shown by phantom lines in FIG. The central portion Pc may be bent (curved) in a convex shape when viewed from the paper feeding direction. Such bending is likely to occur when the width of the paper P is relatively wide. Further, such bending is not limited to the case where the paper feeding means is a sprocket,
It may also occur in the case of a pair of paper feed rollers that drive both sides of the paper to feed the paper. In FIG. 2B, 7 is a paper guide plate.

When the bending of the central portion Pc of the paper occurs as described above, it may cause a paper jam or a wrinkle in the feed.

Therefore, in the conventional apparatus shown in FIG. 6 (a), the guide roller 1 is provided at the center of the shaft 4 to prevent the above-mentioned bending.

At least one of the sprockets 2 and 3 is slidable with respect to the shaft 4 so that the distance between the sprockets 2 and 3 can be changed according to the width of the paper. Therefore, between the guide roller 1 and the sprockets 2 and 3, the helical springs 5 and 5 having the same spring constant and the same length are mounted on the shaft 4, and even if the space between the sprockets 2 and 3 changes, the guide rollers 1 and 1 was always located in the center between sprockets 2 and 3.

[0008]

In the above-mentioned conventional apparatus, the sprockets 2 and 3 whose spacing can be adjusted according to the width of the sheet.
Since a pair of helical springs 5 and 5 are provided on both sides of the guide roller 1 so that the guide roller 1 is always positioned in the center between them, the sprocket 2 (and / or 3, the same applies hereinafter) is replaced by the springs 5 and 5. However, when the sprocket 2 is slid against the urging force of the sprocket 2, some locking means is required to hold the sprocket 2 at that position, resulting in a complicated structure.

An object of the present invention is to solve the above problems and reduce the occurrence of paper jams and wrinkles with a simple structure even though the distance between a pair of paper feeding means can be adjusted. An object of the present invention is to provide a paper feeding device capable of performing the above.

[0010]

In order to achieve the above object, a paper feeding apparatus according to a first aspect of the present invention is such that at least one of the pair of paper feeding means for feeding the paper by contacting both sides of the paper, A paper feeding device configured to be slidable in the paper width direction corresponding to the width of the paper, wherein the pair of paper feeding devices is provided when the slidable paper feeding means is in a position corresponding to a relatively wide paper. A correction member that is located between the means and that corrects the curvature by contacting the sheet that is curved greatly in a convex shape when viewed from the sheet feeding direction, and the correction member can be retracted from between the pair of sheet feeding means. Oh is, and this correcting member at all times by the biasing means
The slider is biased toward the non-retracted position and the slide
The paper feeding means configured to
A cover that slides in the width direction of the paper together with the paper feeding means.
There is a bar, and by contacting this cover
The correction member is placed between the pair of paper feeding means
It is characterized by retracting against the urging force of the urging means .

[0011]

[0012] paper feeding apparatus according to claim 2, wherein, in the sheet feeding apparatus according to claim 1 Symbol placement, path of the paper fed by the pair of paper feed means, it is curved when viewed from the axial direction of the paper feed means Is characterized by.

[0013]

According to the sheet feeding device of the first aspect, the sheet is fed by the pair of sheet feeding means that are in contact with both side portions of the sheet. Since at least one of the pair of paper feeding means is configured to be slidable in the paper width direction corresponding to the width of the paper, even if the paper is relatively wide, the paper is relatively narrow. You can even send this.

Since the sheet receives the conveying force only on both sides thereof, if the sheet has a relatively wide width, the central portion of the sheet may tend to bend in a convex shape when viewed from the sheet feeding direction. According to the sheet feeding device described above, when the slidable sheet feeding unit is in a position corresponding to a relatively wide sheet, the correction member is located between the pair of sheet feeding units and is convex when viewed from the sheet feeding direction. By making contact with a sheet that is largely curved like a circle, the curvature (deflection) is corrected. Therefore, the occurrence of paper jams and feed wrinkles is reduced.

On the other hand, since the straightening member can be retracted from between the pair of paper feeding means, when the slidable paper feeding means is slid to the position corresponding to the relatively narrow paper, the straightening member is moved. By evacuating,
It can be easily slid to that position and can be held in that position without the need for any locking means.

That is, according to the sheet feeding device of the first aspect, the occurrence of paper jam and feeding wrinkles can be reduced with a simple structure even though the distance between the pair of sheet feeding means can be adjusted. You can

Furthermore, according to the sheet feeding apparatus according to claim 1, together with being biased toward the front Symbol straightening member is non-retracted position at all times by the biasing means (i.e. a position capable of correcting the curvature of the paper), The paper feed means configured to be slidable is provided with a cover that covers the paper feed means and slides in the paper width direction together with the paper feed means,
By contacting the cover, the correction member is retracted from between the pair of sheet feeding means against the biasing force of the biasing means, so that the slidable sheet feeding means is slid. As a result, the correction member is automatically retracted to the retracted position or positioned at the non-retracted position. Further, since the correction member retracts by coming into contact with the cover of the paper feeding means, the rotation of the paper feeding means is not obstructed by the correction member.

According to the paper feeding device of claim 2 ,
In the sheet feeding device described in 1 , since the path of the sheet fed by the pair of sheet feeding means is curved when viewed from the axial direction of the sheet feeding means, the degree of freedom in setting the path of the sheet can be increased. Regardless, it is possible to reduce the occurrence of paper jams and wrinkles.

More specifically, in the conventional apparatus shown in FIG. 6A, the path of the paper to be fed is linear when viewed in the direction of the axis 4 (when viewed in the width direction of the paper to be fed). .

On the other hand, if the sheet path can be curved, for example, if the sheet held in the inclined state can be fed while being in the horizontal state from the inclined state, the installation area of the sheet feeding device can be reduced. You can That is, the projected area can be reduced by the amount that the sheet is held in the inclined state.

However, when the path of the sheet is curved, the central portion of the sheet becomes more flexible near the curved portion.

On the other hand, when the correction member is provided, the central portion of the sheet that is about to bend is corrected as described above, and the occurrence of paper jams and wrinkles is reduced.
It is possible to bend the paper path.

Therefore, according to the paper feeding apparatus of the second aspect, the degree of freedom in setting the paper path can be increased, but the occurrence of paper jam and feeding wrinkles can be reduced. Become.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

First, an example of a sheet feeding device which is a premise of the embodiment of the present invention will be described, and then the embodiment of the present invention will be described.

FIG. 1 is an external perspective view of an example of a sheet feeding device which is a premise of the embodiment of the present invention, and FIG. 2 is a sectional view.

The sheet feeding device SF includes a frame 100,
Paper feed roller shaft 11 rotatably supported by this frame
0, a pair of paper feed roller units 120 and 120 ′ attached to the paper feed roller shaft 110, and the frame 10
And a hopper 130 rotatably attached to zero.

An edge guide 131 slidable in the width direction of the paper is attached to the hopper 130. One of the pair of paper feed roller units 120 and 120 ′ is connected to the edge guide 131, and is slidable along the paper feed roller shaft 110 together with the edge guide 131. There is.

Such a sheet feeding device SF is shown in FIG.
It is built into the printer as shown in. In FIG.
Numerals 12 and 13 are a pair of transport rollers for transporting the paper, 14 is a print head for printing on the paper, 15 and 16 are a pair of paper discharge rollers for discharging the printed paper, and 18a and 18b are paper guides.

The hopper 130 is inclined as shown in the drawing, and a plurality of sheets P (FIG. 2) are set on the hopper 130 in a stacked state.

The edge guide 131 shown in FIG. 1 is slid to match the width of the sheet set by the user and guides one side edge of the sheet to be fed. The other side edge is
It is guided by the side wall 101 of the frame 100. Therefore, the other paper feed roller unit 120 is the paper feed roller shaft 1
Do not slide on 10.

A pair of paper feed roller units 120, 12
0'is symmetrically configured and is different only in whether it slides or not. Therefore, only one sheet feeding roller unit 120 will be described below.

Reference numeral 121 denotes a sheet feeding roller as a sheet feeding means, which is formed in a substantially D shape in a side view and has an arc portion 121a and a straight portion 121b, and at least an arc portion 121.
The surface of a and the surface of the straight portion 121b are formed of a high friction material (for example, rubber). The paper feed roller 121 is provided with a cover 122. The cover 122 is attached to a subframe 140 described later.

The paper feed roller shaft 110 is driven to rotate by exactly one rotation during the paper feed operation by a driving means (not shown) of the printer via a gear 111 (see FIG. 1) fixed to the shaft end thereof. ing.

The hopper 130 is rotatably attached to the frame 100 by a shaft 132. Reference numeral 137 is a paper feed tray, which is attached to the printer. These hopper 130 and paper feed tray 137
A plurality of sheets of paper P are set on top of each other in a stacked state (see FIG. 2).
reference). The leading edge Pd of the set paper P is supported and aligned by abutting against the back surface (support surface) 152 of the separation pad holder 151 described later.

Reference numeral 140 denotes a frame (hereinafter referred to as a subframe) of the paper feed roller unit 120, and a hopper spring (compression spring) 133 is provided between the subframe 140 and the tip of the hopper 130. Therefore, the hopper 130 is always urged by the hopper spring 133 in the clockwise direction in FIG. 2, that is, in the direction in which the paper P is brought into contact with the paper feed roller 121. However, as shown in FIG. Cam follower 134
The cam follower 134 contacts the hopper cam 135 fixed to the paper feed roller shaft 110, thereby restricting its rotation. A pad 136 similar to a separation pad described later is provided on the upper surface of the tip of the hopper 130.

In FIG. 2, reference numeral 150 denotes a separation pad, which is fixed to the separation pad holder 151. The separation pad 150 is made of a material (for example, a material such as cork) whose coefficient of friction with respect to the paper P is smaller than that of the paper feed roller 121. Further, each of the friction coefficients is made of a material having a friction coefficient larger than that between the sheets. That is, when the friction coefficient between the paper feed roller 121 and the paper is μ1, the friction coefficient between the separation pad 150 and the paper is μ2, and the friction coefficient between the papers is μ3,
μ1>μ2> μ3.

The separation pad holder 151 is composed of the separation pad 1
It has a pad support portion 153 to which 50 is fixed, a support surface (rear surface) 152 of the above-mentioned sheet front end which is integral with the pad support portion 153, and an arm portion 154 which is integrally formed with the pad support portion 153. The shafts 155 provided on both sides of the rear end are rotatably attached to the sub-frame 140 by being fitted in the holes of the sub-frame 140.

A pad spring (compression spring) 156 as a pad urging means is provided between the lower surface of the pad support portion 153 and the sub-frame 140. Therefore, the separation pad holder 151 is always urged by the pad spring 156 in the clockwise direction in FIG. 2, that is, in the direction of bringing the separation pad 150 into contact with the paper feed roller 121. Is formed with a protrusion (not shown), and this protrusion forms the sub-frame 140.
The rotation thereof is regulated by abutting a pin (not shown) that is provided on the pad and constitutes a pad regulating means. In the state where the protrusion is in contact with the pin, the separation pad 150 is
It is located in the rotation path of the arc portion 121 a of the sheet feeding roller 121.

Reference numeral 160 denotes an idle roller, which is pressed against the separation pad 150 by a biasing force (not shown) with a biasing force smaller than that of the pad spring 156.

The sheet feeding device SF as described above is incorporated in the printer as described above, and is a driving unit included in the printer, and the sheet feeding roller shaft 110 is provided via the gear 111 (see FIG. 1).
Is driven to operate as follows.

During standby, the cam follower 134 of the hopper 130 is in contact with the hopper cam 135, so that the hopper 130 is pushed down.
The linear portion 121b of the sheet feeding roller 121 faces the sheet P, and the sheet feeding roller 121 is not in contact with the sheet P.

Therefore, in this state, the paper P can be easily set on the hopper 130, and the edge guide 131 is slid according to the width of the paper P to guide the side edge of the paper. can do. When the edge guide 131 slides, the paper feed roller unit 120 'also slides accordingly.

During the paper feeding operation, in FIG. 2, the paper feeding roller shaft 110 rotates clockwise, the paper feeding roller 121 and the hopper cam 135 rotate together with the paper feeding roller shaft 110, and the hopper cam 135 and the cam follower 134 of the hopper 130. When the contact with is released, the hopper 130 is pushed up by the hopper spring 133 and the paper P is also pushed up so that both side portions of the uppermost paper P1 come into contact with the arc portions 121a of the pair of paper feed rollers 121. P1 is sent toward the separation pad 150. At this time, the paper P2, which is next to the paper P1, is adsorbed by the action of static electricity, or the frictional force acts between the paper P1 and the paper P2. However, the sheet P2 may be temporarily separated from the sheet P1 because the movement of the sheet P2 is impeded by the leading edge P2a of the sheet P2 hitting the separation pad 150. Similarly, even if the lower-order sheet P3 or the like is sent, it can be separated in the same manner.

Further, as the paper feed roller shaft 110 continues to rotate, the arcuate portion 121a of the paper feed roller 121 presses the separation pad 150 via the uppermost sheet P1. As a result, the separation pad 150 becomes the pad spring 156. The pad spring 156 is pressed at the same time as it is pushed down against the urging force.
The uppermost sheet P1 is pinched between the uppermost sheet P1 and the arc portion 121a of the sheet feeding roller 121 by the urging force of. That is, the paper P
1 is sent while being pinched between the paper feed roller 121 and the separation pad 150. At this time, as described above, the next-order paper P2 may be likely to be sent together with the paper P1, but as described above, the friction coefficient between the paper feed roller 121 and the paper is μ1, and the separation pad 150 is The coefficient of friction with paper is μ2, and the coefficient of friction with paper is μ3
Then, μ1>μ2> μ3. Therefore, when the paper P1 and the paper P2 are both pressed by the arc portion 121a of the paper feed roller and the separation pad 150 as the paper feed roller 121 rotates, The paper P2 is the separation pad 150
The movement thereof is hindered by the frictional force between the sheet P and the sheet P2, and the sheet P2 is secondarily separated from the sheet P1, and only the sheet P1 is fed.

The paper feed roller shaft 110 rotates exactly once, and the hopper 130 is pushed down by the hopper cam 135 to return to the standby state (state shown in FIG. 2).

At this time, the sheet P1 is not completely removed from the sheet feeding device, and the sheet P1 does not reach the trailing edge of the separation pad 150 and the idle roller 160 until the trailing edge of the sheet P1 passes. , The conveyance rollers 2 and 3 in a state in which a load is applied to the abutting portion (a state in which the abutting portion is pulled backward).
Will be transported by.

In this case, the idle roller 160 is urged by the roller spring 165 toward the separation pad 150 to pinch the paper P1 with the separation pad 150. This is prevented even if the paper P2 tries to descend due to its own weight, is attracted to the paper P1 by the action of static electricity, or is sent together with the paper P1 due to the frictional force between the paper P1 and the paper P1.

In the paper feeding device SF as described above, when the paper P to be fed is a relatively wide paper (for example, A4 size paper), the paper P is placed on both sides by the paper feeding rollers 121, 121. Since only the carrying force is received, the central portion (see the broken line Pc in FIG. 5) may be bent (curved) in a convex shape when viewed from the paper feeding direction. Such bending is likely to occur when the paper P is a relatively strong paper such as glossy paper, and causes feeding wrinkles.

This embodiment is made to solve such a problem.

FIG. 3A is a plan view showing an essential part of this embodiment, FIG. 3B is a sectional view taken along line bb in FIG. 3A, and FIG. 3C is a plan view showing a retracted state. It is a figure. In these figures, the same parts as those shown in FIGS. 1 and 2 are designated by the same reference numerals.

The feature of this embodiment is that the correction member 170 is used.
There is a point.

FIG. 4 is a view mainly showing the correction member 170. FIG. 4A is a view seen from the back side of FIG. 3A, FIG. 4B is a left side view when FIG. c) is Figure 3
It is the figure seen from the back side of (c).

The correction member 170 is formed in a substantially plate shape as a whole, and a support plate 180 mounted on the frame 100 (see FIG. 1) (not shown in FIGS. 3A and 3B).
Further, it is rotatably attached by a shaft 181.

A tension coil spring 172 as a biasing means is stretched between the spring hook 171 of the correction member 170 and the spring hook 182 of the support plate 180. Therefore, the correction member 170 is moved by the spring 172 as shown in FIG.
Although it is always biased counterclockwise in (a), the head portion 173 of the correction member 170 contacts the stopper portion 183 formed on the support plate 180 so that its rotation is restricted.

In this state, the front end 174 of the correction member 170 is positioned on the slide track of the slidable paper feed roller unit 120 ', as shown in FIG. 3 (b).

Therefore, the edge guide 131 is shown in FIG.
When the sheet feeding roller unit 120 ′ is slid to the right in (a) and the sheet feeding roller unit 120 ′ is slid to the right, the cover 122 of the sheet feeding roller abuts against the side portion of the correction member 170, whereby the correction member 170 is moved to the position shown in FIG. As shown in (c) and FIG. 4 (c), the paper is withdrawn from between the pair of paper feed rollers 120 against the biasing force of the spring 172. At this time, the spring 172 bends and extends along the outer periphery of the cylindrical bearing portion 175 of the correction member 170.

That is, when the slidable sheet feeding roller unit 120 'is in a position corresponding to a relatively wide sheet as shown in FIG. 3A, the correction member 170 has a pair of sheet feeding rollers 121, When the slidable paper feed roller unit 120 ′, which is located between the two 121, is slid as shown in FIG. 3C to accommodate a relatively narrow paper, the pair of paper feed rollers 121 is automatically , 121.

The non-retracted position, that is, FIG. 3 (a)
When in the position (correctable position) shown in (b), as shown in FIG. 5, the leading end 174 of the correction member 170 comes into contact with the central portion Pc of the sheet which is largely curved convexly when viewed from the sheet feeding direction. The curvature is corrected as shown by an imaginary line Pc '. In addition, when the paper P is a relatively strong paper such as glossy paper, the central portion Pc is often largely curved, and when the paper is plain paper or the like having a relatively weak stiffness, it is largely curved. Therefore, the front end 174 of the correction member 170 is arranged so as to come into contact with and correct the sheet only when the sheet is greatly curved as shown by the broken line Pc. Therefore, the correction member 170 does not interfere with the weakly stiff paper more than necessary and scratch it.

The correction member 170 may be manually rotated without providing the spring 172 to the correction member 170. In this case, it is desirable to integrally provide an operating lever on the head of the correction member 172.

According to the paper feeding device as described above, the following operational effects can be obtained.

(A) The sheet P is fed by the pair of sheet feeding means 121, 121 which are in contact with both side portions Pa of the sheet P. At least one of the pair of sheet feeding units (the sheet feeding roller 121 on the unit 120 ′ side, the same applies hereinafter) is configured to be slidable in the sheet width direction according to the width of the sheet, so that the sheets are compared. Whether the paper is wide or relatively narrow, it can be fed. In this embodiment, it is possible to handle from A4 size paper to postcard size paper. FIG. 3C shows a state in which a postcard is fed.

Since the paper P receives the conveying force only on both sides Pa thereof, if the paper is a relatively wide paper, as shown in FIG. 5, its central portion Pc tends to bend in a convex shape when viewed from the paper feeding direction. However, according to this paper feeding device, when the slidable paper feeding means is in a position corresponding to a relatively wide paper as shown in FIG. 3A, for example,
The straightening member 170 is located between the pair of sheet feeding means, and is greatly curved in a convex shape when viewed from the sheet feeding direction.
When it comes into contact with, its curvature (deflection) Pc becomes P
It will be corrected as shown in c '. Therefore,
The occurrence of paper jams and feed wrinkles is reduced.

On the other hand, since the correction member 170 can be retracted from between the pair of sheet feeding means 121, 121, when the slidable sheet feeding means is slid to a position corresponding to a relatively narrow sheet, By retreating the correction member 170 (manually or automatically), it can be easily slid to that position, and the feeding means 121 does not require any locking means.
Can be held in that position.

That is, according to the sheet feeding device of this embodiment, although the distance between the pair of sheet feeding means 121, 121 can be adjusted, the occurrence of paper jam and feeding wrinkles can be reduced with a simple structure. Can be made.

(B) The correction member 170 has a biasing means 172.
Is always urged toward the non-retracted position (that is, the position shown in FIG. 3A and the position where the curving of the sheet can be corrected), and the slidable sheet feeding means covers the sheet feeding means. A cover 122 that slides in the paper width direction is provided together with the paper feeding means,
The correction member 17 is brought into contact with the cover 122.
Since 0 is retracted from between the pair of paper feeding means 121, 121 against the biasing force of the biasing means 172, the paper feeding means 1 configured to be slidable.
By sliding 21 the correction member 170 is automatically retracted to the retracted position or positioned in the non-retracted position. Therefore, the labor of the user can be reduced.

Further, since the correction member 170 is retracted by coming into contact with the cover 122 of the paper feeding means, the rotation of the paper feeding means 121 is not obstructed by the correction member 170.

(C) Since the path of the paper fed by the pair of paper feeding means is curved as seen from the axial direction of the paper feeding means as shown in FIG. 5, the degree of freedom in setting the paper path should be increased. However, it is possible to reduce the occurrence of paper jams and wrinkles.

More specifically, in the conventional apparatus shown in FIG. 6A, the path of the fed paper is linear when viewed from the axis 4 direction (when viewed from the width direction of the fed paper). .

On the other hand, if the sheet path is curved, for example, if the sheet held in an inclined state as shown in FIG. The installation area can be reduced. That is, the projected area can be reduced by the amount that the sheet is held in the inclined state.

However, when the sheet path is curved as shown in FIG. 5, the central portion Pc of the sheet becomes more easily bent near the curved portion.

On the other hand, when the correction member 170 is provided, the center portion Pc of the paper sheet that is about to bend is corrected as shown by Pc ', and the occurrence of paper jams and wrinkles is reduced. Therefore, the path of the sheet can be curved.

Therefore, according to the paper feeding device of this embodiment, the degree of freedom in setting the paper path can be increased, but the occurrence of paper jams and wrinkles can be reduced. .

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be appropriately made within the scope of the gist of the present invention.

[0075]

By any of the paper feeding apparatus according to claim 1, wherein, according to the present invention, even though the interval between the pair of paper feed means is adjustable, reducing the occurrence of paper jams and feeding wrinkles with a simple structure Can be made.

[0076] Further, by sliding the slide can-configured paper feed means, along with the straightening member is positioned in the retracted automatically retracted position or non-retracted position, rotation of the paper feed means correcting member The effect that it is not hindered by is obtained.

Further, according to the paper feeding apparatus of the second aspect, the degree of freedom in setting the paper path can be increased, but the occurrence of paper jam and feeding wrinkles can be reduced.

[0078]

[Brief description of drawings]

FIG. 1 is an external perspective view of an example of a sheet feeding device that is a premise of an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

3A is a plan view showing a main part of an embodiment of the present invention, FIG. 3B is a sectional view taken along line bb in FIG. 3A, and FIG.
[FIG. 6] is a plan view showing a retracted state of a correction member.

4A and 4B are views mainly showing a correction member 170, FIG. 4A is a view seen from the back side of FIG. 3A, FIG. 4B is a left side view when FIG. Is a view seen from the back side of FIG.

FIG. 5 is an operation explanatory view.

6A and 6B are explanatory views of a conventional technique.

[Explanation of symbols]

P paper 121 paper feed roller (paper feed means) 122 cover 170 Straightening member 172 Extension spring (biasing means)

Claims (2)

(57) [Claims] 1. A paper feeding device in which at least one paper feeding means of a pair of paper feeding means that feeds paper by contacting both sides of the paper is slidable in the paper width direction corresponding to the width of the paper. When the slidable sheet feeding means is in a position corresponding to a relatively wide sheet, the sheet is located between the pair of sheet feeding means and comes into contact with a sheet that is curved in a convex shape when viewed from the sheet feeding direction. and comprises a correcting member for correcting the curvature, this straightening member, Ri retractable der from between between the pair of paper feed means, and the correcting member by the biasing means
It is always urged toward the non-retracted position and
Rideable paper feed means should be covered
In addition, slide in the paper width direction together with this paper feeding means.
A cover is provided and must come into contact with this cover.
Whether the correction member is between the pair of paper feeding means
The paper feeding device is characterized by retracting against the biasing force of the biasing means . Path 2. A sheet fed by the pair of paper feed means, according to claim 1 Symbol placement of the sheet feeding apparatus is characterized in that curved when viewed from the axial direction of the paper feed unit.