| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire door which is very simple in mechanism, and positively opens a door in an emergency. SOLUTION: The fire door is formed of a door frame 1, the door 2, a cylinder case 5 fixed to the door 2 and having built therein a latch bolt 6 for engaging the door 2 at a closed position, an inside handle 10 and an outside handle 20 arranged on door surfaces, for canceling engagement of the latch bolt 6, and a closer 8 for elastically closing the door 2. The outside handle 20 is a lever 21 coupled to the door surface in a tiltable manner, and coupled to the latch bolt 6 via a lock canceling mechanism 23 for canceling the engagement of the latch bolt 6. The inside handle 10 is a pressing portion 11 coupled to the door surface in a protrudable/withdrawable manner, and coupled to the latch bolt 6 via a lock canceling mechanism 13 for canceling the engagement of the latch bolt 6. In the fire door, the door 2 is opened by pulling the lever 21 of the outside handle 20 or pressing the pressing portion 11 of the inside handle 10. COPYRIGHT: (C)2009,JPO&INPIT
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