STRUCTURE FOR OPENING/CLOSING LONG DOOR

PROBLEM TO BE SOLVED: To open a high, large door without having to apply an excessive force, relating to a structure for opening/closing the door. SOLUTION: The structure has, on its column side which abuts the long door when the door is closed, a contactor which feeds electricity from an external power supply, and a magnet catch which provides magnetic attraction. The structure has on the door side a contact which makes contact with the contactor when the door is closed and which is out of contact when the door is open; a key hole in which a key handle for opening and closing is installed; a switch which is incorporated into the key hole and powered when the key handle is installed; and an electromagnet which is attracted to the magnet catch when the switch is not powered and which repels the magnet catch when the switch is powered. The contact, switch, and electromagnet are connected in series with one another. COPYRIGHT: (C)2004,JPO