| 摘要 |
The invention provides a transportation vehicle system. The transportation vehicle system can reduce the moment load on a rotating support part supporting a branch guide roller in a freely rotating way during a branch guiding process. A branch guide roller mechanism (24) comprises branch guide rollers (36-39); a first movable arm (101) and a second movable arm (103) for supporting the branch guide rollers (36-39); and rotating support parts (51, 55) supporting the first movable arm (101) and the second movable arm (103) on the transportation vehicle in a freely rotating way. A branch guide roller driving mechanism (40) which is equipped on the transportation vehicle is applied for switching the branch guide roller (36-39) parts corresponding to the branch guide rail (6e) between a guide position and a non-guide position so as to drive the branch guide roller mechanism (24). The height positions of the rotating center (C) of the rotating support parts (51, 55) are located within a vertical width (H1) of a branch guide roller (36-39) part capable of contacting with the guide position in the branch guide rail (6e). |
