SYNCHRONOUS DRIVING DEVICE FOR FLEXIBLE SCREW

PURPOSE:To provide a synchronous driving device for flexible screw, which can drive a transport object supplying mechanism, etc., in synchronization with the rotation of the screw using a simple structure. CONSTITUTION:A synchronous driving device for a flexible screw 3, which is provided at the periphery with a spiral ridge 1 and rotated round the axis A for feeding an object 2 by the ridge 1, is composed of a wheel part 5 which is equipped at the peripheral edge with a plurality of projections 4 at a constant pitch L2 in the circumferential direction and rotated while the projections 4 are engaged by the ridge 1, a synchronously rotating part 6 which works together with the screw 3 and supplies and exhausts the object 2, and an interlocking mechanism 7 which couples the synchronously rotating part 6 and wheel part 5 so that they work interlockingly. The torque of the screw 3 itself is transmitted to the wheel part 5, interlocking mechanism 7, and the rotating part 6 in the sequence as named.