| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to easily pull out a carriage in such a manner that a caster of the carriage do not interfere with peripheral members when the carriage is pulled out from a storage position in a cabin.SOLUTION: A positioning mechanism 30 for a carriage 20 is provided at a storage position of the carriage 20 in a cabin, and positions a caster 24 of the carriage 20 at the storage position. The positioning mechanism is so configured that when the carriage 20 is moved to the storage position, a direction of the caster 24 directing to a movement direction of the carriage 20 is so made as to direct to a predetermined direction crossing the movement direction of the carriage 20, and when carriage 20 is moved in a direction separating from the storage position by directing of the caster 24 to the predetermined direction, the caster 24 is horizontally rotated in only a predetermined direction. |
