JPH02188332A - Paper conveying device - Google Patents

Abstract

PURPOSE:To obtain a paper conveying device which can easily remove and collect paper dust, etc., by projectingly providing fibers which are slidingly brought into contact with a sheet of paper, in a helical condition on the peripheral face of a roller. CONSTITUTION:A sheet of paper which is sent in the arrow A direction by means of first conveying rollers 13, 14 is guided between the fibers 22 of a cleaning roller 20 and the trapezoidal projecting portion 24 of a guide plate 11 on the downside by means of a paper retainer guide 25 and, by passing through between them, it is conveyed by means of second conveying rollers 15, 16 and detected by an optical sensor 27. When a clutch is operated by the detecting signal, the cleaning roller 20 is rotated counterclockwise to scratch off the paper dust, etc., on the sheet of paper by means of the fibers 22. Since the fibers 22 are provided in a group in a helical condition around a shaft core 21, the paper dust, etc., is sent to the arrow B direction while being scratched off accompanying the rotation of the cleaning roller 20 to be collected into a dust collector 26.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a copying machine, a printer, etc., in which paper is conveyed along a paper conveyance path formed between a pair of upper and lower guide plates. The present invention relates to a paper conveyance device that removes paper dust and the like from paper along the way.

Kasami Tachiko has developed a paper conveying device of this type since 1986-104.
There is one described in Publication No. 353.

This paper conveyance device uses a pair of upper and lower brush rollers as cleaning rollers, each of which has brushes protruding densely and radially around the entire circumference, and these rollers are placed in sliding contact with both the upper and lower surfaces of the paper in the middle of the paper conveyance path. Set up in opposition to. Then, these brush rollers are charged to cause paper dust to adhere to them, and the adhered paper dust is scraped off by an agitator and collected into a long storage container along the brush rollers.

Problems that the invention attempts to solve However, this method had the following drawbacks.

■ The storage container is long and thin, making it difficult to put on and take off.

■ Requires space for installing a storage container close to the paper conveyance path.

■ It is difficult to remove foreign substances on paper other than paper dust.

■ In the case of using a suction tube, the cost will increase significantly.

An object of the present invention is to provide a paper conveying device that can easily remove and collect paper dust and other foreign substances without such problems.

In the present invention, a pair of conveyance rollers are positioned in a paper conveyance path formed between a pair of upper and lower guide plates, and while the paper is conveyed along the paper conveyance path while sandwiching the paper between these conveyance rollers, In a paper conveyance device that uses a cleaning roller to remove paper dust and the like from paper during the paper conveyance path, a roller having fibers protruding in a helical shape on its circumferential surface that slides against the paper is used as the cleaning roller.

- Some of the cleaning rollers have fibers protruding in a helical shape, so when they make one rotation, the fibers scrape off paper dust or other foreign matter from the paper and send it to one end in the axial direction.

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the main parts of a paper conveying device according to the present invention, and FIG.
The figure is a sectional view thereof. A pair of upper and lower guide plates 10 and 11 are arranged opposite each other at a constant interval, and a paper conveyance path 12 for guiding paper (not shown) is formed between them. A first pair of upper and lower conveyance rollers 13 and 14 and a second pair of upper and lower conveyance rollers 15 and 16 are connected to the upper and lower guide plates 10 and 11.
A portion of the paper is inserted into the paper conveyance path 12 through a slit 17 provided in the conveyor rollers 1
A plurality of protrusions 18 are provided on the lower surface of the upper guide plate 1o and the upper surface of the lower guide plate 11, which are conveyed in the direction of arrow A by 3 to 16, respectively, in order to convey the sheets smoothly.
- 19 is formed along the paper conveyance direction.

The first conveyance rollers 13 and 14 and the second conveyance rollers 15 and
A cleaning roller 20 is disposed between the cleaning roller 16 and the cleaning roller 20 . This cleaning roller 20 has numerous fibers 22 protruding from the circumferential surface of a shaft core 21 in a helical shape. , is in contact with the trapezoidal convex portion 24 of the lower guide plate 11 with an appropriate pressure. A paper presser guide 25 made of polyester film or the like is attached to the edge of the slit 23 so as to be inclined downward. The cleaning roller 20 is connected at one end to a drive system via a clutch (not shown), and when this clutch is operated as described below, the cleaning roller 20 is rotated in a counterclockwise direction, which is opposite to the paper conveyance direction. A garbage container 26 is removably disposed below one end of the cleaning roller 20, that is, near one side edge of the guide plates 10 and 11 on the front side of the machine body (↓).

Further, on the upper guide plate 10, a second conveying roller 15
A reflective optical sensor 27 for detecting the paper is attached at a position slightly downstream of the paper 16 in the conveyance direction.

The paper sent in the direction of arrow A by the first conveyance rollers 13 and 14 is moved to the cleaning roller 20 by the paper holding guide 25.
are guided between the fibers 22 of
6 and is detected by the optical sensor 27.

When the clutch is actuated by the detection signal, the cleaning roller 20 is rotated counterclockwise, and paper dust or other foreign matter on the paper is scraped off by the fibers 22. Since the fibers 22 are grouped in a helical shape around the shaft core 21, paper dust or other foreign matter is scraped off as the cleaning roller 20 rotates and is sent in the direction of arrow B, where it is collected by the garbage collector 26. be done.

When the trailing edge of the paper passes the optical sensor 27, the clutch is disengaged, so the cleaning roller 20 stops and enters a standby state.

Note that in this standby state, the fibers 22 of the cleaning roller 20 are in contact with the lower guide plate 11;
Since the fibers 22 have a helical shape, there are only several points, and the hardness and contact pressure of the fibers 22 can be set appropriately, so it is easy to pass the paper between them even if the cleaning roller 20 is not rotating. It is.

Effect of the invention According to the present invention, there are first-order effects.

■ It is also possible to remove foreign substances other than paper dust.

■ A container for collecting paper dust and other foreign matter can be placed on the front side of the machine body, and it can be easily attached and detached.8 ■ It can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a paper conveying device according to the present invention, and FIG.
The figure is a sectional view thereof. 10/11・・・Upper and lower information boards

Claims (1)

[Claims] A pair of transport rollers is positioned in a paper transport path formed between a pair of upper and lower guide plates, and while the paper is sandwiched between these transport rollers and transported along the paper transport path, a cleaning roller is placed in the middle of the paper transport path. A paper conveying device for removing paper dust and the like from a sheet of paper, characterized in that the cleaning roller has fibers protruding in a helical shape on the circumferential surface that make sliding contact with the sheet of paper.