Conveyors for mineral mining installations

摘要

A scraper-chain conveyor for transporting material at a mine face working has a series of pans and a screen used to screen-off the working zone carried by the sides of the pans remote from the face. The screen is composed of sections with two sections being allocated to each pan. Each screen section is composed of a lower wall secured through U-shaped springs to pivot pins permitting the whole section to be swung outwards of the face to a collapsed position. The pins extend through the bights of the springs and an upper wall is received for slidable movement between the arms of the springs. The upper walls can thus be raised into contact with the roof when the screen sections are upright. To hold the sections upright wedge-like locking members are inserted into brackets supporting the pivot pins to engage on the springs.