PURPOSE:To adjust tension of electrical wire connected to a shaft bar by rotating a rotor via a gear mechanism due to rotation of a motor and moving the shaft bar with screw straight by the screw of the rotor. CONSTITUTION:The whole mechanism is supported by a frame 2 and mounted to a lower bundle 1 by an anchor metal fixture 7. a motor 5 and a gear mechanism 6 are mounted on an outer frame 3 and supported fixedly to the ceiling of tunnel by a hanging hook 4. When the motor 5 is rotated, rotation is reduced by the gear mechanism 6, and a disc-shaped rotor 8 is supported by the engagement of a bearing 12 and r ring-shaped projection 9 of the rotor 8 and rotated. A shaft bar 10 is moved straight by the engagement of screw in the center hole of the rotor 8 and screw of the shaft bar 10. And, tension of electrical wire (trolley line) connected to the shaft bar 10 is adjusted.
展开▼
