Patent ID: 8361359

Claim:
A tire vulcanizer comprising: a top mold and a bottom mold for placing a green tire; a top mold mounting member connected to said top mold; a guide mechanism for vertically guiding said top mold mounting member; a ball screw shaft having a vertically aligned shaft center; a ball nut screwed to said ball screw shaft and connected to said top mold mounting member; a driving mechanism for rotating said ball screw shaft switchably between a normal direction and a reverse direction, wherein said driving mechanism is provided with an inverter motor; an inverter capable of servo-locking said inverter motor; an excitation-free electromagnetic brake connected directly to said ball screw shaft to fix said ball screw shaft and provided independently from said driving mechanism; and a control device configured to execute a brake operation switching control for switching between operation and release of said electromagnetic brake, and a motor power control for powering on and off said inverter motor by controlling said inverter.