Abstract: A safety cage utilized in connection with a cargo container hoisting bridle crane including a safety mechanism for securing the safety cage to the cargo container bridle. A plurality of locking pins are rotatably mounted within the roof assembly of the safety cage. Connector beams adapted for receiving the locking pins are mounted on the bridle in such a manner that when the bridle is lowered onto the top of the safety cage the locking pins are positioned within the connector beams. An activation assembly is provided by means of which the locking pins can be rotated to a locked position within the connector beams thereby securely joining together the safety cage and bridle.