PROBLEM TO BE SOLVED: To provide a spreader in which cost reduction is made possible in comparison with the case when switching a rotational speed of a rotating shaft with an exclusive transmission, and a space for arranging a speed changer is made unnecessary.SOLUTION: A spreader 5 includes: a rotating shaft 7 provided with a rotary blade for cutting waste culms a drive shaft 12 disposed in an attitude parallel to the rotating shaft 7 a first pulley 13 mounted to the drive shaft 12 a second pulley 14 mounted to the rotating shaft 7 and a transmission belt 15 wound around the first pulley 13 and the second pulley 14. The first pulley 13 and the second pulley 14 are constituted of pulleys with different diameters, and mountable to the drive shaft 12 and the rotating shaft 7. The rotational speed of the rotating shaft 7 is switched to two steps of high and low speeds, based on changeover between the first pulley 13 and the second pulley 14, and it is made selectable between: a spreader work in which the rotating shaft 7 is rotated at a high speed and waste culms are cut and a dropper work in which the rotating shaft 7 is rotated at a low speed and the waste culms are discharged as they are.COPYRIGHT: (C)2015,JPO&INPIT【課題】専用の変速装置で回転軸の回転速度を切換える場合に比べ、コストダウンを可能にするとともに、変速装置の配置スペースを不要にする。【解決手段】スプレッダ5は、排稈を切断する回転刃が設けられる回転軸7と、回転軸7と並列状に配置される駆動軸12と、駆動軸12に取付けられる第1プーリ13と、回転軸7に取付けられる第2プーリ14と、第1プーリ13及び第2プーリ14に懸回される伝動ベルト15とを備え、第1プーリ13と第2プーリ14を、径が異なるプーリで構成するとともに、駆動軸12及び回転軸7に対して取付可能とし、第1プーリ13と第2プーリ14の入れ換えにもとづいて、回転軸7の回転速度を高低2段に切換え、回転軸7を高速回転させて排稈を切断するスプレッダ作業と、回転軸7を低速回転させて排稈をそのまま放出するドロッパ作業とを選択可能にした。【選択図】図6
