POWER AND FREE CONVEYOR SYSTEM

摘要

A power and free conveyor system (30) is provided which utilizes a difference in height between the wipe in power trolley track (41A) and the wipe out power trolley track (41B), with or without a camming down of a retractable wide dog (84) of the free trolley (50), to allow the wipe in power chain (40A) to wipe in over the retractable dog (84) without any possibility of lateral interference. Thereafter the elevation of the wipe in power trolley track (41A) and the wipe out power trolley track (41B) are the same. An improved stop device (170) operating to push down the retractable dog (84) from the power chain (40) is also provided.