PURPOSE: To make it possible to be automatically in perfect closing condition of a door by providing a sensor for detecting degree of separation of a door against a body, an electromagnetic arranged on one of two, the body side or the door side, an adsorbing body opposing to the electromagnet on the other side, and a control circuit for exciting the electromagnet.
CONSTITUTION: A distance sensor 5 for detecting whether a door 2 is in half door condition or not, is provided on one side of a body 1. Hereafter, an electromagnet 3 is provided on the position of one side of the body so as to adsorb an adsorbing body 4 in the closing door condition, and the adsorbing body 4 is provided on the position of the door 2 side opposing to the electromagnet 3. Nextly, a control part 6 for judging whether it is in half door condition or not due to the signal from the distance sensor 5 is provided. When an output is sent by the control part, as the electromagnet 3 is excited and adsorbs the adsorbing body 4, the half door condition of the door becomes perfect closed condition.
KIMURA TAKASHI
MIZUKAMI NOBORU
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