JPS6137636A - Sheet conveying system in character sensing equipment - Google Patents

Abstract

PURPOSE:To feed sheets easily and certainly, by making a rotary roller have the function of adsorbing the sheets. CONSTITUTION:A rotary roller 13 which sends out sheets 11 loaded on a stand 12, and a picker roller 16 and a reverse roller 17 rotating reversely with each other to separate one sheet from the other(s) when two or more sheets 11 are conveyed at once, are provided. Said rotary roller 13 has a fixed hollow shaft 20 which is connected to a sucking unit 14, a driving shaft 21 which is attached through a bearing 23, and a roller 13a which is set around the outer circumference of said shaft 21. Each of plural adsorbing holes 18 formed radially in the rotary roller 13, can confront the hole 20a of the hollow shaft 20. When this roller 13a is rotated by a driving unit 15, a force which is bigger than the frictional resistance between two of the sheets, acts on the sheet 11, because there combined the frictional resistance and the adsorbing force between the sheet 11 and the roller 13a. Then, the sheets 11 can be separated one by one easily, and each of the sheets 11 can be sent and inserted certainly between two rollers 16, 17.

Description

[Detailed Description of the Invention] (Technical Field) This invention relates to a filter paper feeding machine problem in a character recognition device.
In particular, it relates to a paper feeding mechanism that automatically feeds stacked sheets of paper into the device one by one in an optical character recognition device, which is an information device. (Prior art) In recent years, with the development of information devices, The amount of input required is enormous, and opportunities to use optical character recognition devices that can read characters symbolically are increasing.

This optical character recognition device is equipped with an automatic paper feed mechanism, which feeds a stack of paper one by one and identifies the characters written on the paper.
It is not easy to reliably transport one sheet at a time, and with conventional paper feeding mechanisms that rely on paper friction, the force that feeds the paper to the friction rollers depends on the coefficient of friction between the paper and the paper. Conveying conditions vary depending on the surface resistance and coefficient of friction.Depending on the properties of the paper, it may be difficult to reliably separate the paper and feed only one sheet, and in some cases the separation may be incomplete, resulting in creases. had the disadvantage of damaging the paper.

(Object of the Invention) An object of the present invention is to provide a paper feeding mechanism that eliminates the drawbacks of conventional paper feeding mechanisms and that can extremely easily and reliably feed paper sheet by sheet in accordance with various paper conditions. It's about doing.

(Structure of the Invention) According to the present invention, the difference in the coefficient of friction between the paper and the rotating roller can be reduced.
In the paper feeding mechanism used in the present invention, a paper feeding mechanism in a character recognition device using the rotating roller 2 having an adsorption effect on the rotating roller is obtained.

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

FIG. 1 shows an embodiment of the invention. In FIG. 4, the present embodiment has a stacking section 12 loaded with paper 11, and - the stacking section 1.
Rotating roller 13 for feeding from 2 Bar roller 17
, a suction device 14 that provides a paper suction effect to the rotary roller 13, and a drive device 15 that rotates the rotary roller 13 via a belt or the like.

FIG. 2 shows the rotating roller 13 used in this embodiment. Second
In the figure, this rotary roller 1a, a fixed hollow shaft 20 connected to a suction device 14, and a bearing 2
3, a roller 13a provided on the outer periphery of the drive shaft 21, and a collar-shaped spacer 22 provided between the hollow shaft 20 and the drive shaft 21. This rotary row 213 has a plurality of suction ports 18 radially arranged.
is provided and is configured to face the hole 20a of the hollow shaft. Note that a seal 19 is provided between the hollow shaft 2o and the roller 13a to prevent air from leaking.

This rotary roller 13 has a suction port 18 in the part that comes into contact with the paper so that a suction device 14 can exert a suction effect on the paper, and when the six rollers 13a are rotated by the drive device 15, the sheet 11 is attracted by frictional suction force. The frictional force acting between the sheets is also large, so that the sheets 1 can be easily separated one by one and can be reliably fed and inserted between the rows 216 and 17. Further, the force acting between the paper 11 and the row 213 may be small because the feeding force is added due to the suction force.

In the embodiment of the present invention, the maximum frictional resistance generated between stacked sheets is temporarily applied to a rotating roller of a supply unit equipped with a suction device to apply suction to separate the sheets. In addition to frictional force, which facilitates the separation of phase sheets, suction force is also used at the same time, making it possible to ignore the characteristics of the supply side with respect to the various characteristics of the paper.

(Effects of the Invention) As explained above, the present invention provides an adsorption effect to the paper and the rotating roller, so that paper can be easily and reliably fed without being affected by the various properties of the paper. Accordingly, the adjustment of the force acting between the roller and the paper has the effect that it is not necessary to attach importance to paper feeding.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG. 2 (al.
tbl is a diagram showing details of a rotating roller in an embodiment of the present invention. 11...Paper, 12...Loading section, 13...Rotating roller, 13a, roller 2.14...Suction device, 15...Drive device, 16. Bicker roller, 17...Reno;-su, 18
... Suction port, 19... Seal, 20... Hollow shaft, 2
1. Drive shaft, 22. Spacer, 23...Bearing.

Claims (1)

[Claims] A paper feeding mechanism in a character recognition device, characterized in that the paper feeding mechanism utilizes a difference in coefficient of friction between a sheet of paper and a rotating roller, and a rotating roller having an adsorption effect is used as the rotating roller.