Inner cylindrical body of drafting roller, roller member of drafting roller, drafting roller, drafting device, and air-jet spinning machine

摘要

A front top roller (20) includes a roller member (26) that is rotatably supported via a bearing member (28). The roller member (26) includes an outer cylindrical body (38) made of rubber and an inner cylindrical body (40) arranged inside the outer cylindrical body (38). A coating (53) is applied on an inner peripheral surface of the inner cylindrical body (40).