| 摘要 |
A TROLLEY TYPE CONVEYOR DEVICE INCLUDES A CHAIN UNIT (22) MOVABLE ALONG A RAILWAY UNIT (21), A PLURALITY OF TROLLEYS (3) MOVABLE SYNCHRONOUSLY WITH THE CHAIN UNIT (22) A MAIN FRAME (41) FOR SUPPORTING THE RAILWAY UNIT (21), AND A DRIVING UNIT (51) FOR DRIVING THE CHAIN UNIT (22) . WHEN THE CHAIN UNIT (22) EXPERIENCES UNINTENTIONAL STOPPAGE, AN AUXILIARY FRAME UNIT (42) MOVES ON THE MAIN FRAME (41) SO AS TO ACTIVATE A CONTACT SWITCH (432) , THEREBY STOPPING THE DRIVING UNIT (41) AND, THUS, THE CHAIN UNIT (22).
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