| 摘要 |
PURPOSE:To lift and lower a ceiling wall through a guide mechanism, by separating the ceiling wall from a box-shaped load bed. CONSTITUTION:If a ceiling wall 17 is lifted to a lift up position by a cylinder, a wide gap t3 is formed between an internal surface of the wall 17 and drums 7 in the uppermost stage to facilitate loading and unloading work of the drums 7. While a ventilating gap t2 is also opened between four peripheral walls 15a- 15d and a peripheral wall 17a of the wall 17 to improve ventilation in cooperation with opening of a door 16. If the wall 17 is lowered to a lower down position by the cylinder, a thick cushion material on the internal surface of the wall 17 presses a whole unit of the drums 7 in the uppermost stage, and the drums 7 in the lowermost stage are also fixed between the upper drums and a bottom surface. |
