| 摘要 |
PROBLEM TO BE SOLVED: To prevent a duct in which a telescopic passage for connecting a heat exchange chamber below a station and a storage chamber for a cart is provided from returning to an elevated position accidentally.SOLUTION: On a lower surface side of a ceiling wall of a station 40, a duct in which a telescopic ventilation flue for connecting a heat exchange chamber side communication port and a storage chamber side communication port 32, 33, which are oppositely provided, with each other is provided is disposed, so that it can be elevated/lowered in such a manner that an upper end of each ventilation flue is fixed to the heat exchange chamber side communication port. The duct is suspended and supported by being upwardly energized by an elastic member, while a cam shaft 90 is provided which has a cam for coming into contact with the duct and which lowers the duct against an energization force by the rotation around a shaft center, and also a lock part is provided which locks the cam shaft 90 at a lowering operation position. At ane end part of the cam shaft 90, an operation lever 95 for rotationally operating the cam shaft 90 around the shaft center is detachably mounted by a one-touch attachment/detachment mechanism.SELECTED DRAWING: Figure 1 |
