| 摘要 |
PROBLEM TO BE SOLVED: To reduce weight and cost and eliminates maintenance by forming a clearance for storing lubricant between the opposed surfaces of a rotating body and a mold frame when the mold frame is engaged with the rotating body pivoted rotatably by the holding shaft part of the mold frame. SOLUTION: In a rotating mechanism comprising a rotating body 3 and a mold frame 1, a projected part 2 provided on a mold frame 1 side is engaged with a recessed part 7 provided on a rotating body 3 side so as to form a labyrinth structural part 10 of approximately channel shape. When the rotating body 3 is stationary, it acts as a reservoir for lubricant 80 and, when it is rotated, it acts as a labyrinth seal. The lubricant 80 stored in the labyrinth structural part 10 is oozed from a clearance formed between the projected part 2 and recessed part 7 so as to lubricate the gear part 3a formed on the outer periphery of the rotating body 3 and the rotating part. |
