| 摘要 |
PROBLEM TO BE SOLVED: To offer a roller structure which stores a sufficient quantity of grease at all times so that the refilling frequency is lessened. SOLUTION: A roller structure is composed of an inner ring 3 capable of being fitted on a roller shaft 2 installed vertically, an outer ring 5 capable of being fitted on the inner ring 3 through a bearing 4, an oil seal 6 installed between the rings 3 and 5 below the bearing 4, and an oil encapsulation space formed between the rings 3 and 5 over the bearing 4. Grease (oil) is hindered from dripping (outflow) by the oil seal 6, and the bearing 4 is refilled with grease automatically from the oil encapsulation space 7 so that the part with bearing 4 is filled with heat resistant grease at all times, and idling of the outer ring 5 round the roller shaft 2 can be made with the bearing 4 interposed smoothly at all times. As a large quantity of grease can be encapsulated in the space 7, the structure can manage without refilling of grease for a long period of time.
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