Solid-liquid separation device

A solid-liquid separation device comprising:

• a plurality of movable members;
• a screw extending through the movable members in a state the screw is not in contact with the movable members and which subjects an object to be treated containing liquid to liquid removal treatment while conveying the object by revolution of the screw;
• at least two sets of movable units that are each provided with:
• a driving member composed of one of the plurality of movable members;
• at least one driven member composed of other of the plurality of movable members;
• a connection connecting the driving member and the at least one driven member so as to operate together;
• and
• a cam to pressurize the driving member so as to cause the driving member to perform linear reciprocating motion,
• two of the cams adjacent to each other in an axial direction of the screw being disposed with a different phase from each other such that the movable members of the at least two sets of movable units to which each of the cams belongs perform linear reciprocating motion with a phase difference, and the cams of all the at least two sets of the movable units are fixed to a common driving shaft which is rotationally driven by a motor,
• each of the movable units having an intermediate member pivotally connected to the driving member thereof and a guide configured to guide at least one of the driving member and the at least one driven member such that the driving member and the at least one driven member of the at least two sets of movable units to which the driving member belongs perform linear reciprocating motion when the driving member is pressurized via the intermediate member by the rotation of the cam, wherein the cam consists of an eccentric cam, and the cam slidably fits into a round cam hole on a center side of a bearing fitted into a hole formed through the intermediate member.