| 摘要 |
PROBLEM TO BE SOLVED: To enable prevention of sudden opening of a door owing to a strong wind etc. SOLUTION: A rotary damper device comprises a main body case 10 having an enclosed working liquid Q inside, a rotary body 20 relatively rotatably installed in the main body case 10 to form a pressure chamber and a non-pressure chamber in front of and behind the rotational direction with a partition part 21 capable of moving along the inner peripheral surface in the main body case 10 for the outer peripheral surface, a passage 30 installed in at least one of the main body case 10 or the rotary body 20 to communicate with the pressure chamber and the non-pressure chamber, and a valve body 40 installed in the passage 30 to close the passage 30 by the working fluid Q when the pressure at the pressure chamber side exceeds a predetermined value. COPYRIGHT: (C)2008,JPO&INPIT
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