PROBLEM TO BE SOLVED: To provide an apparatus for preventing operation fault of a rotary rod capable of eliminating foreign matters, such as stones, which hinder the predetermined rotation of the rotary rod rotated around a vertical shaft.SOLUTION: The apparatus for preventing operation fault of a rotary rod includes: a band-like member 21 which penetrates an upper face of an operation box for storing an operation mechanism to be formed rotatably around the vertical shaft by the operation mechanism and fixed to an outer periphery of an operation rod upside of the upper face in the operation rod to be hindered rotational operations by interference in foreign matters put on the upper face and spoke members 22 whose base ends are fixed to the band-like member 21 and front ends are directed diagonally downward as well as arranged dispersedly in a circumference direction of the band-like member 21 and formed such that interval of the adjacent members in the circumference direction becomes smaller than the diameters of the foreign matters.COPYRIGHT: (C)2013,JPO&INPIT【課題】 垂直軸周りに回転する回転ロッドの所定の回転を阻害する置石等の異物を排除し得る回転ロッドの操作障害防止具を提供する。【解決手段】 操作機構を収納する操作箱の上面を貫通して前記操作機構により垂直軸周りに回転可能に形成されるとともに前記上面に置かれた異物との干渉により回転動作が阻害される操作ロッドにおける前記上面の上方で操作ロッドの外周面に固定されるバンド状部材21と、基端部がバンド状部材21に固定されて先端部が斜め下方に向かうとともにバンド状部材21の周方向に分散して配設され、前記周方向で隣接するもの同士の間隔が前記異物の径よりも小さくなるように形成されたスポーク部材22とを有する。【選択図】 図3
