JPH03284549A - Paper feeder - Google Patents

Abstract

PURPOSE:To obtain a paper feeder without generating a skew, even in the case of paper in large width, by supplying the paper by bringing respectively the first paper feed roller into press contact with one end part of the mounted paper and the second paper feed roller into press contact with the other end part of the mounted paper interlocking with a sheet stopper being moved in accordance with a width of the paper. CONSTITUTION:A sheet stopper 21 is slided in accordance with a lateral width of a document 24 mounted on a document table 25. Here a moving roller part 14b is moved associated with the sheet stopper 21. Accordingly, a fixed roller part 14a and the moving roller part 14b are positioned respectively in width directional both end parts of the document. The uppermost surface of the document 24 is brought into press contact with feed rollers 19a, 19b by press-lifting the document 24 by the document table 25. The fixed roller part 14a, moving roller part 14b and separate rollers 20a, 20b are rotated in a direction A by a drive shaft 13. The uppermost document is conveyed in a direction B by rotating the feed rollers 19a, 19b rotated in a direction equal to the direction A.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a paper feeding device that supplies paper to a device that performs predetermined processing using paper as a medium, such as an optical character reading device. .

(Prior Art) Along with the development of computer systems, the development of information devices that make up these systems has also been remarkable. A computer system has a host computer at its center and is surrounded by various peripheral devices.

Among these peripheral devices, there are many devices that use paper as a medium, such as optical character reading devices and printers.

Although they are not computer peripherals, copying machines and facsimile machines are also devices that use paper as a medium.

FIG. 3 is a perspective view showing an example of a paper feeding device used in a conventional processing device using paper as a medium.

In the figure, reference numeral 1 denotes a drive shaft rotatably supported by a main body (not shown) and rotated by the power of a motor (not shown).

A driving gear 2a is attached to this drive shaft 1 at a predetermined interval.
, 2b are provided.

Support members 3a, 3b are provided on the outside of these driving gears 2a, 2b.
is provided on the drive shaft 1. This support member 38
% 3b, intermediate gears 4a, 4b and driven gears 5a, 5b are rotatably supported.

The intermediate gears 5a and 5b are the driving gears 2a s 2
In b, driven gear 58% 5b meshes with intermediate gears 4a and 4b, respectively.

Further, on the outside of the support member 3a%3b, separate rollers 6a%6b are provided on the drive shaft 1, and feed rollers 7a and 7b are provided on the shafts supporting the driven gears 5as and 5b, respectively.

On the other hand, the holding table 9 is pushed up from below by a spring 10, and holds the paper 8 loaded on the holding table 9 so that the top surface of the paper 8 comes into pressure contact with the feed rollers 7a, 7b. ing. Furthermore, on this holding stand 9,
A sheet stopper 11 is provided so as to be slidable in the width direction of the paper 8.

Further, a separator 12 is provided below the separate rollers 6a, 6b, and the surface of this separator 12 has a high coefficient of friction.

Next, the operation of the conventional paper feeding device described above will be explained.

First, the paper 8 to be supplied is stacked and placed on the holding table 9, and one end of the paper 8 is held down by the sheet stopper 11 to prepare the paper 8.

The holding table 9 is pushed up by the spring 10, and the uppermost surface of the paper 8 is pressed against the feed rollers 7a, s, and 7b.

On the other hand, the drive shaft 1 is rotated in the direction A by the drive of a motor (not shown). Then, this drive shaft 1
Separate rollers 6 a s 6 b provided in
rotates in the direction of A.

Further, the driving force of the drive shaft 1 is a driving gear 2a.

2b, intermediate gear 4as4bs driven gear 5a s 5
b to the feed rollers 7 a s 7 b, and these feed rollers 7 a s 7 b rotate in the same direction as A.

As a result, the topmost sheet of paper pressed against the feed rollers 7a and 7b is fed in the direction B.

And this top paper is separated roller 6a s6b
is supplied into the main body (not shown).

When two or more sheets of paper are sent in a pile, the friction surface of the separator 12 causes the separation rollers 6a and 6b to feed only the topmost sheet.

By the way, there are a wide variety of paper sizes used in such devices that perform predetermined processing on paper.

However, in the conventional paper feeding device, the feed roller 7g
, 7b and the separate rollers 6g, 6b were arranged to match the narrowest paper width of the paper fed by this paper feeding device, so when feeding a wide paper, the frictional force Fm of the paper in the C direction There was a problem in that the paper rotated as shown by the dotted line due to the frictional force Ff of the paper in the direction B, causing skew.

(Problems to be Solved by the Invention) As mentioned above, in the conventional paper feeding device, the feed roller,
Since the paper conveyance mechanism consisting of separate rollers is adjusted to the minimum width for paper feeding, there is a problem in that when the width of the paper becomes large, skew occurs and the paper is not fed correctly.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a paper feeding device that does not cause skinny even when the width of paper is wide.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the paper feeding device of the present invention includes a holding table for loading and holding paper, a drive shaft, and a drive shaft for the drive shaft. a first paper feed roller that rotates and conveys the paper while being in pressure contact with substantially one end of the surface of the paper loaded on the holding table; and a first paper feed roller that is slidable in the axial direction of the drive shaft; a sheet stopper that presses one side of the paper loaded on the holding table; and a sheet stopper that is slidable in the axial direction of the drive shaft in conjunction with the sheet stopper, and rotates by the drive of the drive shaft;
A second paper feed roller is provided that conveys the paper while being in pressure contact with substantially the other end of the surface of the paper stacked on the holding table.

(Function) In the paper feeding device of the present invention, the first paper feeding roller moves the second paper feeding roller to one end of the stacked paper in conjunction with the jet spit which moves according to the width of the paper. The paper is supplied by being pressed against the other end of the stacked papers.

Therefore, according to the present invention, paper can be fed without skew even when the width of the paper is wide.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment in which the paper feeding device of the present invention is applied to an optical character reading device, and FIG. 2 is an enlarged plan view of the embodiment shown in FIG.

In these figures, reference numeral 13 indicates a drive shaft rotated by a driving force from a motor (not shown).

A fixed roller section 14a as a first paper feed roller and a movable roller section 14b as a second paper feed roller are disposed on this drive shaft 13.

The fixed roller portion 14a is configured as follows.

A driving gear 15a is provided on the drive shaft 13.

A support member 16a is rotatably provided on the drive shaft 13 inside the driving gear 15a.

An intermediate gear 17a is rotatably supported by the support member 16a and meshes with the driving gear 15a.

Further, a driven gear 18a and a feed roller 19a are provided at both ends of a rotating shaft (not shown) which is supported by the support member 16a.
are connected, and the driven gear 18a meshes with the intermediate gear 17a.

Furthermore, a separate roller 2 is provided inside the support member 16a.
0a is provided on the drive shaft 13.

On the other hand, the movable roller portion 14b is configured as follows.

The drive shaft 13 is provided with a driving gear 15b that is movable in the axial direction of the shaft.

A support member 16b is provided inside the driving gear 15b and is movable in the axial direction of the drive shaft 13. An intermediate gear 17b is rotatably supported by this support member 16b, and this intermediate gear 17b meshes with the driving gear 15b. Further, a rotating shaft 22 is pivotally supported on the support member 16b, and a feed roller 19b and a driven gear 18b are provided at both ends thereof.

This driven gear 18b meshes with the intermediate gear 17b.

Also, a separate roller 20b is provided inside the support member 16b.
is provided on the drive shaft 13 so as to be movable in the axial direction of the drive shaft 13.

Further, a guard plate 23 having a U-shaped cross section is attached to the locking member 23.
A is fixed to the support member 16b so that the separate roller 20b and the driving gear 15b can move integrally with the support member 16b in the axial direction of the drive shaft 13.

On the other hand, a sheet stopper 21 is provided on a form stand 25 that holds forms 24 so as to be slidable in the width direction of the stacked forms 24 via a movement guide rail 26. This sheet stopper 21 is provided with a recess 21a that loosely fits into the projection 16c of the support member 16b.

Further, the form table 25 is pushed up from the main body by a spring 27, so that the top surface of the form is pressed against the feed rollers 19a, 19b.

Further, a conveyance guide 28 is provided below and close to the separate rollers 20a and 20b, and a separator 29 is provided on this conveyance guide 28.

The surface of this separator 29 has a high coefficient of friction.

Next, the operation of the paper feeding device of the above-described embodiment will be explained.

First, the sheet stopper 21 is slid according to the width of the forms 24 stacked on the form stand 25. At this time, the moving roller portion 14b moves in conjunction with the sheet stopper 21.

Therefore, the fixed roller section 14a and the movable roller section 14b are respectively located at the widthwise side ends of the form.

Next, the convex portion 16c of the support member 16b and the sheet stopper 21
Using the play of the four parts 21a, the operator hits the side of the stacked form 24 with the sheet stopper 21, and this form 2
Arrange 4.

On the other hand, the form 24 is pushed up by the form table 25, and the uppermost surface is pressed against the feed rollers 19a and 19b.

Then, driving force from a motor (not shown) is transmitted to the drive shaft 13, and this driving force causes the fixed roller part 14 to
a and the driving gears 15a, 15b of the moving roller portion 14b.
The separate roller 20a120b rotates in the direction A.

Further, the feed rollers 19a and 19b are driven by the driving gear 15a.
s 15bs intermediate gears 17a, 17b and driven gear 1
The driving force from the drive shaft 13 is transmitted through 8a and 18b, causing rotation in the same direction as A. The uppermost form is conveyed in the direction B by the rotation of these feed rollers 19a and 19b.

Then, this form is introduced into the main body (not shown) by a separate roller 20a120b.

At this time, if a plurality of overlapping forms are conveyed, only the topmost form is conveyed and introduced into the main body due to the frictional force of the separator 29 when the separate rollers 20a, 20b convey the forms.

Therefore, in the paper feeding device of this embodiment, even when the width of the form 24 is wide, the fixed roller section 14a and the movable roller section 1
4b are located at both ends of the form 24, so that the form 24 can be fed without skew.

[Effects of the Invention] As explained above, according to the paper feeding device of the present invention, even when the width of the paper is wide, the paper can be fed without being skinny.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a paper feeding device according to an embodiment of the present invention, FIG. 2 is an enlarged plan view of the embodiment shown in FIG. 1, and FIG. 3 is a perspective view showing a conventional paper feeding device. be. 13... Drive shaft, 14a... Fixed roller part,
14b...Movement roller section, 21...Sheet stopper, 24...Form, 25...Form table.

Claims (1)

[Claims] a holding table for holding and holding paper; a drive shaft; and a drive shaft that rotates due to the drive of the drive shaft and conveys the paper while being in pressure contact with substantially one end of the surface of the paper loaded on the holding table. 1 paper feed roller; a sheet stopper that is slidably provided in the axial direction of the drive shaft and presses one side of the paper loaded on the holding table; a second paper feed roller that is slidably provided on the drive shaft, rotates by the drive of the drive shaft, and conveys the paper while being in pressure contact with substantially the other end of the surface of the paper loaded on the holding table; A paper feeding device comprising: