PROBLEM TO BE SOLVED: To provide a rotation apparatus for an extended leveling plate of an agricultural working machine that has no risk of damage even if an interlocking arm is brought into contact with obstacles, etc., when the agricultural working machine is moved in a state in which the extended leveling plate is developed.SOLUTION: The rotation apparatus 40 for an extended leveling plate includes: a motor 43 for forward and reverse rotations that is arranged at the upper side of the plowing rotor of a soil puddling working machine 1 a power transmission mechanism part 47 that is connected to the revolving shaft of the motor and transmits the rotating power of the motor the interlocking arm 53 that is connected to the output shaft of the power transmission mechanism part and is rotated together with the output shaft and a connected body 60 that is connected to between the interlocking arm 53 and an extended leveling plate (left) 30L and rotates the extended leveling plate (left) 30L following the rotation of the interlocking arm 53. The interlocking arm 53 has an arm body part 56 and an arm support part 55 that is fixed on the base of the arm body part, is connected to the output shaft of the power transmission mechanism part 47 and is rotated together with the output shaft. The arm body part 56 has its base side rotatably connected to the arm support part 55 and is fixed on the arm support part 55 through a shear pin 57.COPYRIGHT: (C)2013,JPO&INPIT【課題】延長整地板が展開された農作業機の移動時に、連動アームが障害物等に接触しても損傷する虞のない農作業機の延長整地板回動装置を提供する。【解決手段】延長整地板回動装置40は、代かき作業機1の耕耘ロータの上方に配設された正逆回転用モータ43と、このモータの回転軸に接続されてモータの回動力を伝達する動力伝達機構部47と、この出力軸に接続されて出力軸とともに回動する連動アーム53と、連動アーム53及び延長整地板左30L間に接続されて連動アーム53の回動に伴って延長整地板左30Lを回動させる連結体60とを備え、連動アーム53は、アーム本体部56と、この基部に固定されるとともに動力伝達機構部47の出力軸に接続されて出力軸とともに回動するアーム支持部55とを有し、アーム本体部56は、その基部側がアーム支持部55に回動自在に接続されるとともに、シャーピン57を介してアーム支持部55に固定される。【選択図】 図1
