JPH06263298A - Paper feeder - Google Patents

Abstract

PURPOSE:To provide a paper feeder which can prevent paper from being fed improperly and its periphery from becoming dirty due to paper power and which permits any paper thickness. CONSTITUTION:A supporting element 1 is provided with protruding pieces 11 which face each other at a regular interval. Paper feeding members 2 are constituted of an elastic member and are provided with paper contact parts 21 and supporting pieces 22. Contact surfaces 211 on which the paper contact parts are brought into contact with paper are ford, and the supporting pieces 22 are mounted at a prescribed interval so as to face both sides of the paper contact parts 21 which face each other. A combination with the supporting element 1 is formed so as to hold the supporting piece between the protruding pieces 11. D1<D2 is set so as to be satisfied, where an inner interval D1 between the protruding pieces before holding is taken as D1 and an outer interval between the supporting pieces 22 is taken as D2.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A paper feeding device is used in office automation equipment such as printers and fax machines, and has a function of feeding paper. A conventional paper feeding device generally has a roller shape, and includes a support and a paper feeding member. The paper feed member is made of low hardness rubber, covers the periphery of the support, and feeds the paper by the frictional force between the paper contact surface and the paper.

[0003]

However, the conventional paper feeding device has the following problems. (A) Since the paper feeding member is made of low hardness rubber,
The contact area with the paper is small. For this reason, a paper feed failure is likely to occur. (B) Since the paper feeding member is made of low hardness rubber,
When used for a long time, the paper feeding member is worn by the frictional force received from the paper. Also, paper dust adheres to the rubber surface.
For this reason, the frictional force between the paper feed member and the paper is reduced, and the paper feed becomes poor. (C) Since the paper feeding member is made of low hardness rubber,
With the passage of time, the hardness of the low hardness rubber deteriorates due to the irradiation of ultraviolet rays and ozone. For this reason, the frictional force between the paper feed member and the paper is reduced, and the paper feed becomes poor. (D) Since a strong frictional force acts on the paper contact surface, the paper peels off and paper dust is generated, which stains the surrounding area. (E) Since the paper feeding member is made of low hardness rubber,
If the thickness of the paper exceeds a predetermined value, the paper cannot be fed unless it is used in combination with other means.

Therefore, a first object of the present invention is to provide a paper feeding device capable of reliably feeding paper.

A second object of the present invention is to provide a paper feeding device capable of preventing paper feeding failure by preventing abrasion of the paper feeding member due to long-term use.

A third object of the present invention is to provide a paper feeding device capable of preventing a paper feeding failure even when the hardness of the paper feeding member is deteriorated by irradiation of ultraviolet rays or ozone due to the passage of time. That is.

A fourth object of the present invention is to provide a paper feeding device in which the paper is not peeled off by frictional force and the surroundings are not polluted by paper dust.

A fifth object of the present invention is to provide a paper feeding device capable of feeding paper regardless of the thickness of the paper.

A sixth object of the present invention is to provide a paper feeding device which can be easily assembled without fixing with an adhesive, screws or the like.

[0010]

In order to solve the above-mentioned problems, the present invention is a paper feeding device having a support and a paper feed member, wherein the support is a protrusion facing each other with a space therebetween. Having a piece, the paper feeding member is composed of a member having elasticity, has a paper contact portion, and a support piece, the paper contact portion constitutes a contact surface for contacting the paper, The support pieces are provided on opposite sides of the paper contact portion at intervals so as to face each other, and are combined with the support body so that the support pieces are sandwiched between the projecting pieces. , D1 <D2, where D1 is the inner distance between the protruding pieces before being sandwiched and D2 is the outer distance between the supporting pieces.

[0011]

The supporting member has the projecting pieces facing each other with a space, and the paper feeding member is composed of a member having elasticity, and has the paper contacting portion and the supporting piece. A contact surface that contacts the paper is formed, and the support pieces are provided on both sides of the paper contact portion facing each other with a space so as to face each other, and the support piece is sandwiched between the projecting pieces with respect to the support body. Therefore, the support piece can be easily assembled without fixing the support piece to the projecting piece with an adhesive, a screw, or the like.

When the paper feeding member has elasticity and the inner distance between the projecting pieces before the nipping is D1 and the outer distance between the supporting pieces is D2, D1 <D2 is satisfied, so that the paper feeding member is used. The supporting piece of the member is pressed by the protruding piece, and the paper contact portion rises to the outside. Therefore, when the paper is fed, the paper contact portion is deeply crushed and the area of contact with the paper is increased. Therefore, the paper is reliably fed.

As described above, since the paper feeding member has elasticity and the paper contact portion is deeply crushed, the area in contact with the paper is increased, and the paper contact portion per unit area in the contact surface with the paper is increased. The frictional force of is reduced. Therefore, the abrasion of the paper feeding member is reduced. Therefore, even if it is used for a long time, the frictional force due to the abrasion of the paper feeding member does not decrease, and the paper feeding failure can be prevented.

Even if the hardness of the paper feeding member deteriorates due to irradiation of ultraviolet rays or ozone with the passage of time, the paper contact portion is deeply crushed as described above, so that the paper feeding member receives from the paper. The decrease in frictional force can be mitigated. Therefore, it is possible to prevent the paper feed failure.

As described above, in the paper feeding member, the paper contact portion is deeply crushed, the area in contact with the paper is increased, and the frictional force per unit area on the contact surface of the paper contact portion with the paper is reduced. , The paper will not come off due to frictional force. Therefore, no paper dust is generated and the surroundings are not polluted by the paper dust.

Since the paper feed member is made of an elastic material, it is crushed according to the thickness of the paper. Therefore, the paper can be fed regardless of the thickness of the paper.

[0017]

1 is a front sectional view of a paper feeding device according to the present invention. In the figure, 1 is a support, and 2 is a paper feed member.

The support 1 is a projecting piece 1 facing each other with a space.
Have one.

The paper feed member 2 has a ring shape in the figure and is made of an elastic member such as rubber or synthetic resin, and has a paper contact portion 21 and a support piece 22. ing. The paper contact portion 21 constitutes a contact surface 211 that comes into contact with the paper, and the support pieces 22 are provided at both sides of the paper contact portion 21 facing each other with a space therebetween so as to face each other. The support piece 22 is sandwiched between the projecting pieces 11. Then, as shown in FIG. 2, when the inner distance between the protruding pieces 11 before being sandwiched is D1 and the outer distance between the support pieces 22 is D2, D1 <D2 is satisfied.

As described above, the support 1 has the protruding pieces 11 facing each other with a space therebetween, and the paper feeding member 2 is composed of a member having elasticity, and the paper contact portion 21 and the support piece. 22 and the paper contact portion 21 constitutes a contact surface 211 that comes into contact with the paper, and the support pieces 22 are provided on both sides of the paper contact portion 21 facing each other at intervals so as to face each other. 1, since the support piece 22 is sandwiched between the projecting pieces 11, the support piece 22 is attached to the projecting piece 11 with an adhesive,
It can be easily assembled without fixing with screws or the like.

When the paper feeding member 2 has elasticity and the inner space between the projecting pieces 11 before being sandwiched is D1 and the outer space between the supporting pieces is D2, D1 <D2 is satisfied. The support piece 22 of the sending member 2 is pressed by the projecting piece 11, and the paper contact portion 21 rises to the outside (see FIG. 1). Therefore, when the paper is fed, as shown in FIG. 3, the paper contact portion 21 is deeply crushed, and the area of contact with the paper 30 increases. Therefore, the paper is reliably fed.

As described above, since the paper feed member 2 has elasticity and the paper contact portion 21 is deeply crushed, the area of contact with the paper 30 increases, and the contact surface of the paper contact portion 21 with the paper is increased. Two
The frictional force per unit area at 11 is reduced. Therefore, the abrasion of the paper feed member 2 is reduced. Therefore, even if it is used for a long time, the frictional force due to the abrasion of the paper feed member 2 does not decrease, and the paper feed failure can be prevented.

Even if the hardness of the paper feeding member 2 is deteriorated by the irradiation of ultraviolet rays or ozone with the passage of time, the paper contact portion 21 is deeply crushed as described above, so that the paper feeding member 2 is It is possible to mitigate the reduction of the frictional force received from the paper. Therefore, it is possible to prevent the paper feed failure.

As described above, in the paper feed member 2, the paper contact portion 21 is deeply crushed, and the area in contact with the paper 30 increases,
Since the frictional force per unit area on the contact surface 211 of the paper contacting portion 21 with the paper 30 is reduced, the paper 3 is caused by the frictional force.
0 does not come off. Therefore, no paper dust is generated and the surroundings are not polluted by the paper dust.

Since the paper feed member 2 is made of a material having elasticity, the paper feed member 2 is crushed according to the thickness of the paper 30. Therefore, the paper can be fed regardless of the thickness of the paper 30.

In FIG. 1, a cavity A is provided between the paper feed member 2 and the support 1, the support 1 has an air vent hole 12, and the air vent hole 12 communicates from the cavity A to the outside. It shows the type. By doing so, the paper feeding member 2
After being crushed, it is easy to return to the original shape again.

4 to 7 are views showing another embodiment of the paper feeding apparatus according to the present invention.

In the type of embodiment shown in FIG. 4, the paper feeding member 2 has a ring shape, and the support 1 has a through hole 110. The through hole 110 is provided on the axis C. In this type, since the through hole 110 is provided on the axis C, the position of the support body 1 can be adjusted when the support body 1 is fixed through the through hole 110 through the support rod 111.

In the type of the embodiment shown in FIGS. 5 and 6, the paper feeding member 2 has a ring shape, and the support 1 has the projecting piece 11.
You can adjust the distance between them. The support 1 is composed of a first support member 1a and a second support member 1b, the first support member 1a has a bolt portion 11a, the second support member 1b has a nut portion 11b, and The bolt portion 11a and the nut portion 11 are screwed together. The inner space between the protrusions 11 is adjusted by changing the depth of screw connection between the bolt portion 11a and the nut portion 11b. Therefore, the paper contact portion 2
It is possible to adjust the curvature of No. 1 and the contact area with the paper.

In the embodiment of FIG. 7, the protrusion 11 of the support 1 extends in one direction. In the paper feed member 2, the width of the paper contact portion 21 is wider than that of the paper 30, and the cross-section of the paper contact portion 21.
The support piece 22 and the support piece 22 are concave.

[0031]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a paper feeding device that can reliably perform paper feeding. (B) It is possible to provide a paper feeding device capable of preventing a paper feeding failure by preventing abrasion of the paper feeding member due to long-term use. (C) It is possible to provide a paper feeding device capable of preventing a paper feeding failure even when the hardness of the paper feeding member is deteriorated by irradiation of ultraviolet rays or ozone due to the passage of time. (D) It is possible to provide a paper feeding device in which the paper does not come off due to frictional force and the surroundings are not contaminated by paper dust. (E) It is possible to provide a paper feeding device capable of feeding paper regardless of the thickness of the paper. (F) It is possible to provide a paper feeding device that can be easily assembled without being fixed with an adhesive, screws, or the like.

[Brief description of drawings]

FIG. 1 is a front sectional view of a paper feeding device according to the present invention.

FIG. 2 is a front cross-sectional view showing a shape of a support body and a paper feeding member shown in FIG. 1 before being sandwiched.

FIG. 3 is a diagram illustrating a state of a contact portion between a sheet feeding device according to the present invention and a sheet.

FIG. 4 is a sectional view of a specific embodiment of the paper feeding device according to the present invention.

FIG. 5 is a cross-sectional view of a specific example of the paper feeding device according to the present invention.

FIG. 6 is a sectional view of a specific example of the paper feeding device according to the present invention.

FIG. 7 is a sectional view of a specific embodiment of the paper feeding device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support 2 Paper feeding member 11 Projection piece 12 Air vent hole 21 Paper contact part 22 Support piece 30 Paper 110 Through hole 111 Support rod 211 Contact surface 1a First support member 1b Second support member 11a Nut part 11b Bolt part

Claims (8)

[Claims] 1. A paper feeding device having a support and a paper feeding member, wherein the support has protrusions facing each other with a gap, and the paper feeding member is elastic. A paper contact portion and a support piece, the paper contact portion constitutes a contact surface for contacting the paper, and the support piece is formed on both sides of the paper contact portion facing each other. It is provided at a distance so as to face each other, and is combined with the support body so that the support piece is sandwiched between the projecting pieces, and the inner space between the projecting pieces before sandwiching is defined as D1. A paper feed device that satisfies D1 <D2, where D2 is the outer distance between the support pieces. 2. The paper feeding device according to claim 1, further comprising a cavity between the paper feeding member and the support. 3. The paper feeding device according to claim 2, wherein the cavity is sealed. 4. The support has an air vent hole, and the air vent hole communicates with the outside from the cavity.
The paper feeding device described in 1. 5. The paper feeding device according to claim 1, wherein the paper feeding member has a ring shape. 6. The paper feeding device according to claim 5, wherein the support has a through hole, and the through hole is provided on an axial center. 7. The paper feeding device according to claim 5, wherein the support body can adjust the inner space between the protrusions. 8. The paper feeding apparatus according to claim 1, 2, 3, or 4, wherein the protrusion of the support member extends in one direction.