Keyence Corporation

Yuki Tokita

Tomomi Izaki

To suppress charging of a housing of a static eliminator while avoiding an influence on control of ion balance. In order to suppress the charging of the housing of the static eliminator, the housing is provided with a rear frame that is conductive. The rear frame is insulated from a placement surface of the static eliminator by an insulating member such as an insulating pad, an inner spacer, and an outer spacer, and movement of an electric charge from the rear frame to an earth via the placement surface is prevented. In addition, the rear frame is not connected to the earth, but is connected to a ground, that is, a wire electrically connected to each of a low-response detection circuit, a positive polarity high voltage power supply, and a negative polarity high voltage power supply.

Static eliminator

An ionizer of a corona discharge type is configured to increase the yield of ions while minimizing contamination of a discharge electrode by foreign matters. In the ionizer, a gas path unit () supplied with clean gas has internal clean gas paths () in an electrode assembly (), and clean gas is released through each internal clean gas path () to make a clean gas flow enclosing a front end portion of a discharge electrode (). The electrode assembly () has a guard ring () encircling the discharge electrode (), and the guard ring () has external air inlet openings () permitting free passage of atmospheric air. The clean gas flow enclosing the tip of the discharge electrode () inhales atmospheric air through external air inlet openings () of the guard ring () and changes to ionized air.

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Osaka, Japan

Yuki Tokita