PROBLEM TO BE SOLVED: To prevent efficiency reduction in work using a work machine with reciprocal movement.SOLUTION: A hedge trimmer 1 with reciprocally driven blades 3a, 3b comprises: a reversely rotatable electric motor 10 a conversion mechanism for converting rotational driving force outputted from the electric motor 10 to reciprocal driving force to reciprocate the blades 3a, 3b a first driving force transmission path provided between the electric motor 10 and the conversion mechanism and inputting the rotational driving force to the conversion mechanism during normal rotation of the electric motor 10 a second driving force transmission path for inputting the rotational driving force to the conversion mechanism during reverse rotation of the electric motor 10 a first speed reduction mechanism provided in the first driving force transmission path and a second speed reduction mechanism provided in the second driving force transmission path and having a different speed reduction ratio from the first speed reduction mechanism. The rotation direction of the rotational driving force inputted to the conversion mechanism through the first driving force transmission path is opposite to the rotation direction of the rotational driving force inputted to the conversion mechanism through the second driving force transmission path.COPYRIGHT: (C)2015,JPO&INPIT【課題】往復動作業機を用いた作業の効率低下を回避する。【解決手段】往復駆動されるブレード3a,3bを備えるヘッジトリマ1であって、正逆転可能な電動モータ10と、電動モータ10から出力される回転駆動力を往復駆動力に変換してブレード3a,3bを往復動させる変換機構と、電動モータ10と変換機構との間に設けられ、電動モータ10の正転時に回転駆動力を変換機構に入力する第1動力伝達径路と、電動モータ10の逆転時に回転駆動力を変換機構に入力する第2動力伝達径路と、第1動力伝達径路に配置された第1減速機構と、第2動力伝達径路に配置され、第1減速機構とは減速比が異なる第2減速機構と、を有し、第1動力伝達径路を介して変換機構に入力される回転駆動力の回転方向と第2動力伝達径路を介して変換機構に入力される回転駆動力の回転方向とが反対である。【選択図】図2
