| 摘要 |
PROBLEM TO BE SOLVED: To easily attach and detach a ceiling carrier to/from a loop-like traveling rail fitted to a ceiling surface. SOLUTION: A shifter rail RS, is installed in a notch part K provided in a loop-like main track rail RM freely to be detached, and a ceiling carrier V suspended from the shifter rail RS is moved to a side of the main track rail RM by a lateral shift device A1, and transferred to a lifter rail RL connected to the shifter rail RS by a vertical shift device A2 through an intermediate rail RC, and lowered to a carrier connecting position P5 by a lifter device A3.
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