PURPOSE: To provide a roller mill capable of preventing the generation of self-excited vibration caused by stick slip phenomenon.
CONSTITUTION: In the roller mill provided with plural grinding rollers arranged at prescribed intervals on a grinding ring disposed at the outer periphery of an upper face of a grinding table rotated around the vertical axis in a mill housing 10, a roller bracket rotatably supporting the roller and a pressurizing frame 26 for pressing the grinding roller to the grinding ring by supporting the roller bracket oscillatably through a roller pivot, a stopper 51a and an arresting tool 52 for arresting the inclination of the pressurizing frame to the horizontal face are formed between the mill housing and the pressurizing frame in two vertical steps. As a result, the slipping of each grinding roller is synchronized and the self-excited vibration is prevented.
NISHIDA HIDEKAZU