JPS62160Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a static electricity eliminator roller, particularly for use in copying machines, facsimile machines, etc., to eliminate static electricity generated when paper such as originals or recording paper runs. Regarding the static elimination roller.

It is generally known that static electricity generated when a document or the like moves in a facsimile apparatus increases as the humidity of the surrounding environment decreases. This type of static electricity can cause the original to stick to a guide plate, etc. as it travels through the facsimile machine, or cause the leading edge of the original to stick to the guide plate, etc. after the original is ejected, causing the original to buckle. This was causing a paper jam.

Conventionally, a method of removing this type of harmful static electricity has been to metalize the rollers. However, it has been found that simply contacting with a conductive metal surface does not eliminate static electricity, or has only a limited effect. In addition, as another example of static electricity removal, a wire brush made of conductive wires bundled in parallel is placed in the travel path of the document, and static electricity is discharged to the grounded tip of the wire brush to eliminate static electricity. ing. However, since the wire brush is a strong grounding object for the traveling document, a problem arises in that the document is strongly electrostatically attracted to the wire brush and paper jams are likely to occur.

Therefore, an object of this invention is to provide a static electricity eliminating roller that can prevent paper jams caused by static electricity in facsimile machines and the like.

FIG. 1 is a perspective view of a static electricity eliminating roller according to an embodiment of this invention. FIG. 2 is a sectional view of the -' portion of the static electricity eliminating roller shown in FIG. 1.

In the structure, the static electricity eliminating roller 1 of this embodiment has one end of a large number of conductive filaments 12 implanted along the radial direction on the outer periphery of a metal core 11 so as to be electrically conductive. The space around the large number of conductive wires 12 is filled with an insulating member 13 such as a resin member such as plastic or rubber. The outer peripheral surface 14 of this static electricity eliminating roller 1
is polished into a cylindrical shape with the metal core 11 as the axis so that the other end surface of the conductive filament 12 is exposed.

This static electricity eliminating roller 1 has a core metal 11 grounded and is used as a roller for holding and pulling a document in a facsimile machine. Therefore, the other end surface of the conductive filament 12 comes into contact with the surface of the document, and the static electricity charged on the document can be effectively eliminated, resulting in an extremely excellent static elimination effect. Further, as the static electricity eliminating roller 1 rotates and contacts the surface of the document to transport the document, paper jams can be prevented.

In the above description, the static electricity eliminating roller 1 is used to eliminate static electricity from a document on the sending side of a facsimile machine, but it can of course also be used to eliminate static electricity from a recording paper on the receiving side of a facsimile machine. Moreover, it can be used not only as a printing device such as a facsimile machine but also as a traveling roller of a copying machine.

As described above, according to this invention, the other ends of a large number of conductive wires, one end of which is connected to the core bar, are exposed from the outer surface of the cylindrical insulating member so as to be close to the paper. With this configuration, static electricity generated when a document or the like is traveling can be discharged from the conductive wire through the core bar. Therefore, paper jams can be prevented by rotating the static electricity eliminating roller and bringing it into contact with the surface of the document and transporting the document.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a static electricity eliminating roller according to an embodiment of this invention. FIG. 2 is a sectional view of the -' portion of the static electricity eliminating roller shown in FIG. 1. In the figure, 1 is a static electricity eliminating roller, 11 is a metal core, 12 is a conductive wire, 13 is an insulating member, and 14 is an outer circumferential surface.

Claims (1)

[Claims for Utility Model Registration] A roller of a copying machine or a facsimile machine that grips and drives paper, the core of the roller is grounded, and a large number of rollers are arranged along the radial direction on the outer periphery of the core. One end of each of the conductive wires is planted, and the space between each of the large number of conductive wires is filled with an insulating member, and the outer shape of the insulating member is such that the outer shape of the core bar corresponds to the shaft core. static electricity, characterized in that the other end of the plurality of conductive wires is exposed on the outer surface of the cylindrical insulating member and is close to the paper. Static elimination roller.