| 摘要 |
PROBLEM TO BE SOLVED: To prevent breakage of the central part of a rotary shaft and the occurrence of breakage to the two end parts of a rotary shaft when an abnormal load is exerted on a journalling part and to prevent the occurrence of a trouble to rotation of a rotary body even when breakage occurs to the rotary shaft. SOLUTION: The journalling structure of a rotary body is such that a rotary body is rotatably mounted on a base body by a journalling means B. A journalling means B comprises a rotary shaft that two end parts are integrally connected in succession on either side the base body or the rotary body, and a bearing part 6 mounted either on the body on the other side or the rotary body. The diameters of the two end part sides integrally connected to the base body of the rotary shaft or the rotary body side are increased to a high valve and that of a central part is decreased to a low value. |
