| 摘要 |
Conveyance of an article from a processing device 16 is assigned to an overhead running carriage 12 a. Conveyance of an article to the processing device 16 is assigned to an overhead running carriage 12 b. When the overhead running carriage 12 b reaches the processing device 16 earlier, it unloads the conveyed article onto a buffer shelf 22 facing a load port 20 . The article originally present at the load port 20 is loaded on the overhead running carriage 12 b and then transferred. The overhead running carriage 12 a, reaching the processing device 16 later, transfers the article from the buffer shelf 22 to the load port 20 . Conveyance instructions can be assigned without the consciousness of the state of load port. As a result, articles can be efficiently transferred.
|
