JPH02175537A - Paper sheets carrying device - Google Patents

Abstract

PURPOSE:To read the image of the original with high quality over the whole of the original by comprising a corona electrical charging unit before the input/ output of the image and a discharging means after them, and adhering the paper sheets to a rotating drum at the time of input/output of the image. CONSTITUTION:At the adsorption position B, the electrostatic field where the ion is flowed from a corona discharge electrode 6a to a rotating drum 3 is formed, and when the original A made of paper arrives here, the electrostatic polarization of the paper is caused by the ion electrical charge, and the original A is adsorbed to the rotating drum 3 by the electrostatic force. The adsorbed original A is sent to a reading unit C by the rotation of the rotating drum 3 under the condition that the original is tightly adhered to the cylindrical surface of the rotating drum. After the reading, the original A sent out by the rotation of the rotating drum 3 receives the contact of a discharging brush 12 immediately before the release position so that the static electricity charged on the paper is removed. The absorption of the original A to the rotating drum 3 is weakened by that discharge, and the original A is released from the cylindrical surface by a releasing blade 13, and is driven by a feed out carrying belt 8, exhaust rollers 11, 14 so as to be exhausted to a stacker 15.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for conveying paper sheets, such as manuscripts and papers, used in input/output devices such as image scanners and printers.

Back to Conventional Technology 2 Conventionally, this type of paper sheet conveying device has been configured to use a conveying force applying means such as a conveying roller or a conveying belt at both ends of the sheet conveying path in order to apply a conveying force to the paper sheets. It is constructed so that conveying force can be applied throughout the entire path of the paper sheet.

FIG. 2 shows the configuration of a conventional paper sheet conveying device. In FIG. 2, a denotes a manuscript, which is stored in the manuscript honohar 101. A picker roller 102 receives a control signal and sends out the originals a one by one. 103 is a rotating drum that is constantly rotating. Reference numeral 104 denotes a feed conveyor belt, which is driven by rollers and which holds the document a between it and the rotating drum 103.
and send it to the reading section. Reference numeral 105 is an image reading head that reads the image of the document a and transmits the signal to the control unit. Reference numeral 106 denotes a feed-out conveyance belt which is driven by rollers, which inserts the read original document a between it and the rotating drum 103, sends it out from the reading section A, and discharges it to the stacker 107. 108 is a conveyance guide, 109
is the discharge roller.

In this way, even with the above-mentioned conventional paper sheet conveying device, the original Paper sheets such as manuscripts can be transported reliably.

Problems to be Solved by the Invention However, in the above-mentioned conventional sheet conveying device, since there is no regulating member on the reading side in the reading section A, the original A is lifted up and the read image is blurred, and the paper sheets are jammed. In addition, in order to solve these problems, if the conveyor belt is suspended over the reading section, the conveyor belt covers a part of the document, so the image of the entire document cannot be seen. There is a problem that it becomes impossible to read.

The present invention solves these conventional problems,
It is an object of the present invention to provide an excellent paper sheet conveyance device that can read images of the entire area of a document without lifting the document in a document reading section (a).

Means for Solving the Problems In order to achieve the above object, the present invention provides a corona charger in front of the reading section so that the original is conveyed in close contact with the rotating drum by electrostatic force. .

Effects The present invention has the following effects due to the above structure. In other words, when a high voltage is applied to the corona charger, an electrostatic field is formed between the corona charger and the rotating drum, and when paper sheets pass through this field, the paper becomes electrostatically polarized, and the paper is attached to the rotating drum due to the electrostatic force. The document can be reliably conveyed by suction and rotation of the rotating drum.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, A is a document stored in a document hopper 1. As shown in FIG. Reference numeral 2 is a pinker roller which moves up and down in response to a control signal to take out the documents A one by one from the hopper 1 and send them to the conveying section. 3 is a cylindrical rotating drum that is constantly rotating. Furthermore, the rotating drum 3 is grounded. Reference numeral 4 denotes a pinch roller which is pressed against the rotating drum 3 and constantly rotates. 5.5a and 5b are paper guides. 6 is a corona charger, and a corona discharge electrode 6 is made of a conductive thin wire.
The shield case 6b has an opening on the rotary drum 3 side and is grounded, and a high voltage power source 6C that applies a high voltage to the corona discharge electrode 6a. Reference numeral 7 denotes an image reading head, which detects when a document is sent, reads the image of the document A, and transmits the image data to the control section. Reference numeral 8 denotes a feed conveyor belt, which is driven by a feed roller 9, a tension roller 10, and a discharge (upper) roller 1, and is constantly rotated while being pressed against the rotating drum 3. 12 is a static eliminating brush that removes static electricity charged on the paper. 1
3 is a peeling blade that lightly slides on the cylindrical surface of the rotating drum 3. 14 is a discharge (lower) roller, which is pressed against the discharge (upper) roller 1 and constantly rotates. 1
A stacker 5 stores processed originals.

Next, the operation of the above embodiment will be explained. In the embodiment described above, the picker roller 2 receives a control signal, moves to a position where several documents are taken out, rotates for a certain period of time, and returns to a standby position. This operation causes document A to be sent out from the hopper 1. The sent out document A reaches a suction position B of the rotary drum 3 facing the corona charger 6 by the action of the rotary drum 3, pinch rollers 4 and 6, . . . -/paper guide 5.5a. At the suction position B, an electrostatic field is formed in which ions flow from the corona discharge electrode 6a toward the rotating drum 3. When the document A, which is paper, reaches this point, the paper is electrostatically polarized due to the electrification of the ions, and the electrostatic The original A is attracted to the rotating drum 3 by the force. The document A attracted to the rotating drum 3 is attached to the rotating drum 30.
Due to the rotation, it is sent to the reading section C in a state in which it is in close contact with the cylindrical surface of the rotating drum 30. In the reading section C, the image reading head 7 detects the leading edge of the document A and starts reading.
Send image data of document A to the control section. After reading, the original A is sent out from the reading section C by the rotation of the rotary drum 3. Since the adhesion force due to electrostatic force decreases with the passage of time, the document A is sent with the help of the feeding conveyance belt 8. The document A sent out by the rotation of the rotary drum 3 is contacted by the static eliminating brush 12 just before the peeling position, and the static electricity that has been charged on the paper surface is removed. The document A, whose adhesion to the rotating drum 3 has been weakened by the neutralization, is peeled off from the cylindrical surface of the rotating drum 3 by the peeling blade 13. The separated original document A is driven by the feed conveyance belt 8 and the discharge rollers 11 and 14, and is discharged to the stacker 15.

As described above, according to the above embodiment, when a high voltage is applied to the corona charger 6, the document A is attracted to the cylindrical surface of the rotary drum due to electrostatic force, so that the conveyance force can be obtained only by the rotary drum 3. , and document A is the image reading head 7.
It has the advantage that it can pass through the reading section C while maintaining a constant height with high precision.

Note that by using a print head in place of the image reading head 7, the present invention can be applied to various printing devices.

Effects of the Invention As is clear from the above embodiments, the present invention charges a document with a corona charger, and uses the electrostatic force to attract the document to a cylindrical rotating drum and convey it. This has the effect that the entire document can be conveyed in a free state, and the entire surface of the document can be read.

Furthermore, since the original is attracted to the cylindrical surface of the rotating drum by electrostatic force, the original cannot pass through the reading section while maintaining a constant height from the image reading head over the entire surface.
It also has the effect of being able to read document images with high quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a paper sheet conveying device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional paper sheet conveying device. A... Original, 1... Original hopper, 2... Picker roller, 3... Rotating drum, 6... Corona charger, 7
Image reading head, 12, static elimination brush, 15...
Stacker 0

Claims (1)

[Claims] A cylindrical rotating drum, a conveying means for conveying paper sheets along the rotating drum while rotating the rotating drum, and a conveying means installed opposite to the rotating drum for inputting images onto the paper sheets. The image input/output means includes an image input/output means for outputting an image, a corona charger for charging the paper sheet before the image input/output, and a static eliminator for removing static from the paper sheet after the image input/output. A paper sheet conveying device characterized in that the paper sheets are brought into close contact with the rotating drum during output.