JPH1149397A - Paper feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper feeding device which can spread the wrinkles or twisting generated in a paper sheet. SOLUTION: The first group 3 comprises sheet contacting pieces (31-33) while the second group 4 comprises sheet contacting pieces (41-43). The two groups are furnished on a rotary shaft 2 on both sides in axial direction in such a way as pinching a feed roller 1. Each of the sheet contacting pieces (31-43) has contact ends (C11-C14) to (C61-C64). The distance R1 from the axis of the rotary shaft 2 to the forefront for each sheet contact piece corresponds to the rotational radius R2 of the feed roller 1. The two groups of sheet contacting pieces are arranged at spacings (D1-D4) in the axial direction of the rotary shaft 2. The contact ends (C61-C64) are arranged in different rotational angle positions between different contacting pieces belonging to the same group, and the rotating direction lengths of the contact ends (C11-C64) are not overlapped in the rotating direction when viewed in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder.

[0002]

2. Description of the Related Art A paper feeder is used for OA equipment such as a printer and a facsimile, and has a function of feeding paper. In the paper feeding device, it is important that the paper does not wrinkle or twist during paper feeding and paper discharging. The paper feed device includes a paper feed roller and a rotary shaft body, and the paper feed roller has a cutout in a part of the paper contact surface over the entire length of the rotary shaft body in the axial direction. The structure provided on the rotating shaft body is already known.

When the above-mentioned paper feeder is used in an OA apparatus, the cutout portion is an open section in which the paper is not suppressed by the paper feed roller, and the paper contact surface other than the cutout portion is the paper feed roller. It is a paper feeding surface that comes into contact with the paper.

According to the above-described structure, the paper feed roller can extend the wrinkles generated on the paper and return the twist by the open section.

However, in the above-described paper feeding device, the paper feeding is stopped at the notch, so that the paper feeding speed is not constant. This causes a problem that the paper feeding operation cannot be performed smoothly. If a large number of cutouts are provided in the paper feed roller to prevent wrinkles, twists, and the like from occurring more reliably, the paper feed speed decreases, and the paper feed operation cannot be performed quickly.

As a means for solving such a problem, a paper feed roller which does not include a notch and has a paper feed surface all around.
There is already known a technique of adding a paper feeder having a stirrer to an OA device. However, such a paper feeder has a complicated structure, is large, and is heavy.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feeder capable of executing a smooth and quick paper feed operation.

Another object of the present invention is to provide a paper feeder capable of performing an operation of extending wrinkles and twists generated on paper.

Still another object of the present invention is to provide a paper feeder which is simple in structure, lightweight and small.

[0010]

In order to solve the above-mentioned problems, a paper feeder according to the present invention comprises a paper feed roller, a rotating shaft, a first group of paper contact pieces, and a second group of paper contact pieces. Paper contact strips.

The paper feed roller is provided on the rotary shaft at an intermediate portion in the axial direction of the rotary shaft.

[0012] Each of the first paper contact piece group and the second paper contact piece group includes a plurality of paper contact pieces, and the rotating members are disposed on both sides in the axial direction with the paper feed roller interposed therebetween. Each is provided on a shaft.

Each of the paper contact pieces has a paper contact end, and the distance from the axis of the rotary shaft to the paper contact end corresponds to the radius of rotation of the paper feed roller. They are spaced apart in the axial direction of the body.

The paper contact ends are located at different rotation angle positions between different paper contact pieces in the same paper contact piece group;
Further, when viewed in the axial direction, the length in the rotation direction has a dimension that does not overlap in the rotation direction.

As described above, the paper feed roller is provided on the rotary shaft at an intermediate portion in the axial direction of the rotary shaft.
According to this structure, when the rotary shaft rotates, the paper feed roller rotates while contacting the intermediate portion in the width direction of the paper.
Therefore, in the middle part in the width direction of the sheet, a sheet feeding operation in one direction can be given to the sheet.

The first paper contact piece group and the second paper contact piece group are provided on the rotating shaft body on both sides in the axial direction with the paper feed roller interposed therebetween. Moreover, each of the paper contact pieces has a paper contact end, and the distance from the axis of the rotary shaft to the paper contact end has a value corresponding to the rotation radius of the paper feed roller. According to this structure, each of the paper contact pieces reliably contacts the paper on both sides of the paper feed roller. Therefore, in synchronization with the paper feed operation by the paper feed roller, a paper feed operation by the paper contact pieces included in the first paper contact piece group and the second paper contact piece group is added on both sides thereof. For this reason, even if the paper feed direction is deviated, the feed direction of the paper contact pieces included in the first paper contact piece group and the second paper contact piece group on both sides of the paper feed roller. A corrective action is added. For this reason, the paper can be smoothly and quickly fed without largely deviating from the original paper feeding direction.

Each of the paper contact pieces is provided at an interval in the axial direction of the rotating shaft body. Therefore, each of the paper contact pieces contacts the first paper contact piece group from the middle portion in the width direction of the paper to one end side, and within the second paper contact piece group, the paper contact piece in the width direction of the paper. It contacts from the middle part to the other end side. Therefore, on both sides of the paper feed roller, the axial length of the first paper contact piece group and the axial length of the second paper contact piece group substantially function as a paper feed operation area. A paper feed operation in the original paper feed direction can be given to the paper.

The paper contact ends are located at different rotation angle positions between different paper contact pieces in the same paper contact piece group, and have a length in the rotation direction that does not overlap in the rotation direction when viewed from the axial direction. have. According to this structure, the paper contact end is
Intermittent contact with paper at different timings.
A period from when one paper contact end comes into contact with the paper until the next paper contact end comes into contact (hereinafter, referred to as release timing)
The paper is released from being suppressed by the paper contact end. Therefore, at the opening timing, the shape restoring force of the sheet itself acts. For this reason, at the opening timing, the wrinkles generated on the sheet are extended by the shape restoring force of the sheet itself, and the twist is eliminated.

As described above, the paper feeder includes only a paper feed roller, a rotating shaft, a first group of paper contact pieces, and a second group of paper contact pieces. And light weight. Further, the structure is simple and small.

More specific features and advantages of the present invention will be described more specifically with reference to the drawings.

[0021]

FIG. 1 is a perspective view showing a paper feeder according to the present invention, and FIG. 2 is an enlarged view of the paper feeder shown in FIG. 1 as viewed from the axial direction of a rotating shaft. As shown in FIGS. 1 and 2, the paper feeding device includes a paper feeding roller 1 and a rotating shaft 2.
And a first paper contact piece group 3 and a second paper contact piece group 4.

The paper feed roller 1 is provided on the rotary shaft 2 at an intermediate portion in the axial direction of the rotary shaft 2.

The first paper contact piece group 3 includes a plurality of paper contact pieces 3
1, 32, 33, and the second paper contact piece group 4 includes a plurality of paper contact pieces 41, 42, 43. Multiple paper contact pieces 3
1, 32, 33 and a plurality of paper contact pieces 41, 42, 43
Are located on both sides in the axial direction with the paper feed roller 1 interposed therebetween.
Each is provided on the rotating shaft body 2.

Each of the paper contact pieces 31 to 43 has a paper contact end (C11 to C14), (C21 to C24), (C31
To C34), (C41 to C44), (C51 to C5)
4) and (C61 to C64). In the embodiment shown in FIG. 1, each of the paper contact pieces 31 to 43 is a quadrilateral, and the corners are the paper contact ends (C11 to C14) to (C61).
To C64).

Each of the paper contact pieces 31 to 43 has a paper feed roller 1 having a distance R1 from the axis of the rotary shaft 2 to the tip thereof.
Corresponds to the turning radius R2. Paper contact strips 31, 32,
33 are provided at intervals D1, D in the axial direction of the rotary shaft body 2.
2, paper contact pieces 41, 42, 43
Are arranged at intervals D3 and D4 in the axial direction of the rotating shaft body 2. In the embodiment shown in FIG.
As shown in the figure, R1 ≒ R2.

The paper contact ends C11 to C64 are located at different rotation angle positions θ1, θ2, θ of the rotary shaft 2 with respect to the center line O between different paper contact pieces in the same paper contact piece group.
3 and the paper contact ends C11 to C64 have dimensions such that the length in the rotation direction does not overlap in the rotation direction when viewed from the axial direction.

In the embodiment, the paper contact pieces 31, 32, 33
Are the rotation angle positions θ1, θ2, θ of the paper contact end from the paper feed roller 1 side toward the one end 21 of the rotary shaft body 2.
3 are arranged so as to become gradually larger. The paper contact pieces 41, 42, 43 are rotated from the paper feed roller 1
The rotation angle positions θ1, θ2, θ3 of the paper contact end gradually increase toward the other end 22 of the paper contact end.

For example, as for the paper contact piece 31, the rotation angle position of the paper contact end C11 with respect to the center line O is θ1, the paper contact piece 3
Reference numeral 2 indicates that the rotation angle position of the paper contact end C21 is θ2> θ1, and the paper contact end C31 is disposed such that the rotation angle position is θ3> θ2 (> θ1). Other paper contact ends (C12, C2
2, C32), (C13, C23, C33), (C1
4, C24, C34), (C41, C51, C61),
(C42, C52, C62), (C43, C53, C6
The same applies to 3) and (C44, C54, C64).

Paper contact piece 3 included in first paper contact piece group 3
Among the paper contact pieces 41, 42, and 43 included in the first, second, and third paper contact piece groups 4, two papers having the same order counted in the axial direction from the paper feed roller 1. Contact piece (3
1, 41), (32, 42), and (33, 43) have substantially the same rotation angle position of the paper contact end. For example, between the paper contact piece 31 and the paper contact piece 41, the paper contact end C11 and the paper contact end C41, and the paper contact end C12 and the paper contact end C
42, and the paper contact end C13 and the paper contact end C43 are at substantially the same rotational angle position. Paper contact piece 32 and paper contact piece 42
A similar relationship exists between the paper contact piece 33 and the paper contact piece 43 with respect to the contact end.

In FIG. 1, the first paper contact piece group 3 and the second paper contact piece group 4 are each composed of three paper contact pieces 31-31.
33, 41 to 43, but the number can be set arbitrarily. Further, each of the paper contact pieces is a quadrilateral in the embodiment shown in FIG. 1, but can take various other shapes.

FIGS. 3 to 12 are views for explaining the operation of the paper feeder in the use state. Here, the paper contact ends C11 (C41), C21 (C51), C3
Only 1 (C61) will be described, and description of other corresponding paper contact ends will be omitted.

The paper feed roller 1 is provided on the rotary shaft 2 at an intermediate portion in the axial direction of the rotary shaft 2. According to this structure, when the rotary shaft 2 rotates in the direction of the arrow a, the paper feed roller 1 rotates while contacting the intermediate portion of the paper 5 in the width direction. Therefore, in the middle portion of the paper 5 in the width direction, a paper feeding operation in one direction b can be given to the paper 5.

The first paper contact piece group 3 is composed of a plurality of paper contact pieces 3
1, 32, 33, and the second paper contact piece group 4 includes a plurality of paper contact pieces 41, 42, 43. Multiple paper contact pieces 3
1, 32, 33 and a plurality of paper contact pieces 41, 42, 43
Are located on both sides in the axial direction with the paper feed roller 1 interposed therebetween.
Each is provided on the rotating shaft body 2.

Each of the paper contact pieces 31 to 43 has a paper contact end C11, C21, C31, C41, C51, C61.

Each of the paper contact pieces 31 to 43 is connected to the paper contact end C11, C21, C31, C4 from the axis of the rotating shaft body 2.
1, the distance R1 to C51 and C61 is the paper feed roller 1
(See FIGS. 4, 8, and 12).
reference).

According to this structure, each of the paper contact pieces 31 to 43 reliably contacts the paper 5 on both sides of the paper feed roller 1. Therefore, in synchronization with the paper feed operation by the paper feed roller 1, paper feed operations by the paper contact pieces 31 to 33 and the paper contact pieces 41 to 43 are added on both sides thereof (FIGS. 3, 4, 7, and 8). 8, 11, and 12
reference). For this reason, even if a deviation occurs in the paper feed direction, the paper contact pieces 3 are provided on both sides of the paper feed roller 1.
A feed direction correcting operation by the sheets 1 to 33 and the paper contact pieces 41 to 43 is added. For this reason, the paper 5 can be smoothly and rapidly fed without greatly deviating from the original paper feeding direction indicated by the arrow b.

Each of the paper contact strips 31, 32, 33 is
The paper contact pieces 41, 42, 43 are arranged at intervals D 1, D 2 in the axial direction of the rotating shaft 2, and the paper contact pieces 41, 42, 43 are arranged at intervals D 3, D 4 in the axial direction of the rotating shaft 2. (See FIGS. 4, 6, 8, 10, and 12).

Therefore, each of the paper contact pieces 31 to 33 comes into contact in the first paper contact piece group 3 from the intermediate portion in the width direction of the paper 5 to one end side, and the paper contact pieces 41 to 4
Each of the contact members 3 contacts the second sheet contact piece group 4 from the middle portion in the width direction of the sheet 5 to the other end. Therefore, on both sides of the paper feed roller 1, the axial length L1 of the first paper contact piece group 3 and the axial length L2 of the second paper contact piece group 4 (FIGS. 4, 6, and 8). , FIG. 10 and FIG. 12) substantially function as a paper feeding operation area, so that the paper 5 can be fed in the original paper feeding direction indicated by the arrow b.

Paper contact ends C11 (C41), C21 (C5
1) and C31 (C61) are different rotation angle positions θ1, θ2, θ3 of the rotary shaft 2 with respect to the center line O between different paper contact pieces in the same paper contact piece group (see FIG. 2). ), And the length of the paper contact end in the rotation direction does not overlap in the rotation direction when viewed from the axial direction.

According to this structure, the paper contact end C11 (C4
1), C21 (C51) and C31 (C61) are paper 5
Intermittently at different timings (see FIGS. 3, 4, 7, 8, 11, and 12). A period from when one paper contact end comes into contact with the paper 5 until the next paper contact end comes into contact (hereinafter, referred to as opening timing).
Is released from the pressing of the paper 5 by the paper contact end (see FIGS. 5, 6, 9 and 10). Therefore, at the opening timing, the shape restoring force provided in the sheet 5 itself acts. For this reason, at this opening timing, the wrinkles generated on the paper 5 are extended by the shape restoring force of the paper 5 itself, and the twist is eliminated.

As described above, the paper feeder only includes the paper feed roller 1, the rotating shaft 2, the first group of paper contact pieces 3, and the second group of paper contact pieces 4. Since the number of constituent members is small, the weight is low. Further, the structure is simple and small.

Paper feed roller 1 and paper contact pieces 31 to 43
Is generally made of an elastic material, for example, rubber, synthetic resin, or the like. According to this structure, the paper feed operation can be performed on the paper 5 without damaging the paper 5 such as a scratch. When the distance R1 from the axis of the rotary shaft 2 to the tip is larger than the rotation radius R2 of the paper feed roller 1, the difference is absorbed by the elasticity of the paper contact pieces 31 to 43 based on the elasticity. be able to. The same applies when the rotation radius R2 of the paper feed roller is larger than the distance R1 from the axis of the rotary shaft 2 to the tip.
Therefore, each of the paper contact pieces 31 to 43 is
Can be reliably contacted.

Further, in the embodiment shown in FIG. 1, each of the paper contact pieces 31 to 43 has holes (not shown) penetrating in the axial direction of the rotary shaft 2 at the four corners. Therefore, when the paper is fed, the tip of the paper contact piece is crushed deeply, and the area in contact with the paper 5 increases. Therefore, the paper feeding is reliably performed.

FIG. 13 is a perspective view showing another embodiment of the paper feeder according to the present invention. The same components as those shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the embodiment shown in FIG. 13, the first paper contact piece group 3 includes a plurality of paper contact pieces (311 to 313) to (331).
333), and the second paper contact piece group 4 includes a plurality of paper contact pieces (411 to 413) to (431 to 433);
It is provided on a rotating shaft 2 on both sides in the axial direction with the paper feed roller 1 interposed therebetween.

Paper contact pieces (311 to 313) to (431 to
433) has a paper contact end (not shown), the distance from the axis of the rotary shaft 2 to the paper contact end corresponds to the radius of rotation of the paper feed roller 1, and They are arranged at intervals in the axial direction.

The paper contact pieces (311, 312, 313)
It is arranged at the same position in the axial direction, and its tip constitutes the paper contact end. The paper contact ends formed by the respective leading ends of the paper contact pieces 311, 312, and 313 are located at mutually different rotation angle positions, and have dimensions such that the length in the rotation direction does not overlap in the rotation direction when viewed from the axial direction. . The same applies to the other paper contact pieces (321 to 323) to (431 to 433).

The paper contact ends formed by the respective leading ends of the paper contact pieces 311 to 433 are located at different rotational angle positions and different in the rotational direction between different paper contact pieces in the same paper contact piece group. Have dimensions that do not overlap in the rotational direction when viewed from the axial direction.

In this embodiment, the same operation and effect as in the embodiment shown in FIG. 1 can be obtained. In the embodiment shown in FIG. 13, the first paper contact piece group 3 and the second paper contact piece group 4
Are three paper contact pieces 31 to 33, 41 to 43, respectively.
, But the number can be set arbitrarily. The number of the protruding pieces constituting one paper contact piece is three, but the number can be arbitrarily determined as needed.

[0049]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a paper feeding device capable of executing a smooth and quick paper feeding operation. (B) It is possible to provide a paper feeding device capable of performing an operation of extending wrinkles and twists generated on paper. (C) It is possible to provide a light-weight and small-sized paper feeder having a simple structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a paper feeding device according to the present invention.

FIG. 2 is an enlarged view of the paper feeding device shown in FIG. 1 as viewed from an axial direction of a rotating shaft body.

FIG. 3 is a front view illustrating an operation of the paper feeding device in a use state.

FIG. 4 is a side view of the paper feeding device shown in FIG. 3;

FIG. 5 is a front view illustrating the operation of the paper feeding device in a use state.

FIG. 6 is a side view of the paper feeding device shown in FIG. 5;

FIG. 7 is a front view illustrating the operation of the paper feeding device in a use state.

FIG. 8 is a side view of the paper feeding device shown in FIG. 7;

FIG. 9 is a front view illustrating the operation of the paper feeding device in a use state.

FIG. 10 is a side view of the paper feeding device shown in FIG. 9;

FIG. 11 is a front view illustrating the operation of the paper feeding device in a use state.

FIG. 12 is a side view of the paper feeding device shown in FIG.

FIG. 13 is a perspective view showing another embodiment of the paper feeding device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper feed roller 2 Rotary shaft body 3 1st paper contact piece group 4 2nd paper contact piece group

Claims (4)

[Claims] 1. A paper feeder comprising a paper feed roller, a rotating shaft, a first paper contact piece group, and a second paper contact piece group, wherein the paper feed roller is , An intermediate portion in the axial direction of the rotary shaft body, provided on the rotary shaft body, each of the first paper contact piece group and the second paper contact piece group, a plurality of paper contact pieces Wherein the paper contact rollers are provided on the rotary shaft on both sides in the axial direction, respectively, and each of the paper contact pieces has a paper contact end, and the rotary shaft includes The distance from the shaft center to the paper contact end corresponds to the radius of rotation of the paper feed roller, and is disposed at an interval in the axial direction of the rotary shaft body. Between different paper contact pieces in the paper contact piece group, they are at different rotation angle positions, and the rotation direction length is viewed from the axial direction. Paper feed apparatus having dimensions that do not overlap in the direction of rotation. 2. The paper feeding device according to claim 1, wherein the rotation angle position of the paper contacting end of the paper contacting piece is from the side of the paper feeding roller to the end of the rotary shaft. As you head,
A paper feeder that grows larger. 3. The paper feeding device according to claim 1, wherein the paper contact pieces included in the first paper contact piece group and the second paper contact pieces are included in the first paper contact piece group.
Among the paper contact pieces included in the paper contact piece group, the order counted in the axial direction from the paper feed roller is the same.
A paper feeder in which the two paper contact pieces have substantially the same rotation angle position of the paper contact end. 4. The paper feed device according to claim 1, wherein the paper feed roller, the first paper contact piece group, and the second paper feed roller.
Is a paper feeder made of a material having elasticity.