DESCENT STOP POSITION CONTROL UNIT IN LIFT TYPE IMMERSION TREATMENT APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a descent stop position control unit capable of regulating the descent stop position of an object to be treated such as a reinforcing rod mat or the like due to a lifter corresponding to the fluctuations of the liquid surface of a treatment liquid such as a rustproof liquid or the like without providing a sensor or the like to the lifter in a lift type immersion treatment apparatus for raising and lowering the object to be treated with respect to the treatment liquid to apply immersion treatment to the object to be treated. SOLUTION: In the lift type immersion treatment apparatus, a movable member 30 lowered and moved in connection with the falling operation of the object to be treated is arranged in the vicinity of the falling movement terminal position at the time of falling movement of the object to be treated by the lifter and a measuring instrument 24 for measuring the distance up to the treatment liquid L is arranged above the movable member 30 and a control means for stopping the lifter when the distance measured by the measuring instrument 24 becomes a predetermined distance immersing the object M to be treated in the treatment liquid perfectly is provided.