| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a necessity for regulating a person's entry into a lower part of a traveling rail 4. SOLUTION: An overhead traveling vehicle 2 is provided with a lid drop prevention member 20, and a clearance between a cassette 30 to be conveyed and a lid 32 has size less than thickness of the lid 32. The drop prevention member 20 is provided with a cut-out part 22 to reduce its weight and is provided with a light projection part 24 and a light receiving part 25 to detect deviation of the lid 32 in order to stop the overhead traveling vehicle 2 when the lid is deviated. COPYRIGHT: (C)2005,JPO&NCIPI
|
