| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a door body operating mechanism which retains an overhanging portion of a door body protruding from a base body when the door body assumes an open position, and controls the door body to be braked according to engagement between gears, to thereby improve the operating characteristics thereof. SOLUTION: In the door body operating mechanism for rotatively switching the door body between a closed position in which the door body 3 closes an opening of the base body 2, and the open position, the door body 3 has its arm 31 protrude therefrom, and has an arcuate gear portion 37 arranged on the arm 31, and a rotary gear 7 attached to an arcuate center of the gear portion. The base body 2 has a first fixed gear portion 27a of an internal gear type engageable with the arcuate gear portion 37 and a second fixed gear portion 28 arranged inside the first fixed gear 27a and engageable with the rotative gear 7. Then, the arm 31 is vertically movably borne via the engagement of the arcuate gear portion 37 with the first fixed gear portion 27a and the engagement of the rotary gear 7 with the second fixed gear portion 28, and the door body 3 is switched along a track corresponding to the first fixed gear portion 27a via the arm 31.</p> |
