PUMP DRIVE DEVICE

PROBLEM TO BE SOLVED: To solve problems in installing a reciprocating drive type pump to a soil disinfection device and driving it with an oscillating crank wherein, although there is known in the past a technology of promptly changing a discharge rate by slidingly operating an adjustment lever connected to an oscillation fulcrum, the fulcrum position of the oscillation fulcrum cannot be returned correctly to the original fulcrum position when returning the discharge rate to the original discharge rate after changing the same. SOLUTION: The adjustment lever 44 includes a first movable body 54 sliding in the longitudinal direction of the oscillation crank 40 for locking to a lock body 56 at multiple-step positions and a second movable body 55 sliding along the first movable body 54 for locking to the first movable body 54 at stepless positions. A fulcrum cam 41 is connected to one of ends of the second movable body 55 and a lever operating part 57 is provided at the other end of the second movable body 55. COPYRIGHT: (C)2011,JPO&INPIT