Power and free conveying system

摘要

A power and free conveying system includes a track assembly (26) having a power track (36) and a free track (40) spaced vertically from the power track (36), a power trolley (110) supported on the power track (36) for movement therealong and a free trolley (54) supported on the free track (40) for movement therealong. The free trolley (54) includes a moveable holdback dog (104) engageable and disengageable with the power trolley (110). The free trolley (54) includes a retractable dog (84) having a first position engageable with the power trolley (110) and a second position disengageable with the power trolley (110) and engageable with the holdback dog (104) to completely disengage the free trolley (54) from the power trolley (110) upon engaging another one of the free trolley. The track assembly includes a C-shaped first side support member (32) having an upper transverse end connected to the power track (36) and a lower transverse end connected to the free track (40) and a C-shaped second side support member (34) opposite and spaced from the first side support member (32) having an upper transverse end connected to the power track (36) and a lower transverse end connected to the free track (40). <IMAGE>