Scraping device for disposing waste from cowshed, has tightener system with ratchet wheel including peripheral teeth which engage with corresponding teeth of ratchet arm by lifting of arm, during rotary action on wheel in opposite direction

摘要

The device has a tightener system (4) with a ratchet wheel (5) including peripheral teeth (6). The teeth (6) cooperate with corresponding teeth of a ratchet arm (8) along a direction of rotation (F1) of the wheel corresponding to a direction of traction (F2) of a chain (3) activated by a driving motor. The teeth (6) engage with the corresponding teeth by lifting the arm, during a rotary action on the wheel in an opposite direction (F4).