PROBLEM TO BE SOLVED: To provide a clutch device for a seedling planting apparatus at low cost in a simple construction, including a clutch pin to make a fixed position stopping operation while it moves inward and outward in the radial direction, in which the clutch pin is hindered from separation off the contacting position with a follower side rotor.SOLUTION: A fixed position stopping mechanism A is composed of a recess for contacting formed at the peripheral surface of the follower side rotor 30 and the clutch pin 39 to be separably engaged with the recess, wherein the contacting surface 37 of the recess 33 positioned behind about the rotating direction is formed so that the surface positioned outside more than inside about the radial direction with respect to the normal passing the rotational center of the follower side rotor 30 is located in front about the rotating direction.COPYRIGHT: (C)2009,JPO&INPIT【課題】 半径方向での内外へ移動して定位置停止作用を行うクラッチピンの従動側回転体との接当箇所からの離脱を抑止させるようにしたクラッチ装置を、構造簡単、かつ低コストで得る。【解決手段】 定位置停止機構Aを、従動側回転体30の外周面側に形成した接当用の凹入部と、その凹入部に対して係脱可能なクラッチピン39とで構成し、凹入部33の回転方向での後方側における接当面37を、従動側回転体30の回転中心をとおる法線に対して、半径方向での内方側よりも外方側に位置する面が、回転方向の前方側に位置するように形成してある。【選択図】 図8
