NOZZLE CHANGE-OVER DEVICE

PROBLEM TO BE SOLVED: To easily control nozzle change-over by a compact configuration. SOLUTION: This nozzle change-over device changing over fluid supply passages to a plurality of nozzles is provided with a selector valve mechanism having a single drive motor, a valve seat opened for the supply passages, and a movable valve element seated on the valve seat to close the supply passages for every nozzle and a conversion means for converting the rotation of a motor output shaft into reciprocal movement per nozzle so that the movable valve element leaves the valve seat. The change-over valve mechanism is further provided with a pressing member for pressing and energizing the movable valve element in the direction of seating on the seat, the conversion means is provided with a plurality of eccentric cams mounted on the motor output shaft and being eccentric for every nozzle, and each eccentric cam has an outer ring for pressing the movable valve element against pressing and energizing forces by the pressing member, an inner ring attached to the motor output shaft, and a bearing part provided between the inner ring and the outer ring. Moreover, it has a detection means for detecting opening and closing conditions of the supply passages for every nozzle.