| 摘要 |
PROBLEM TO BE SOLVED: To surely and safely open or close an upward/downward sliding type door in an enclosed vessel. SOLUTION: In an opening/closing device 3 for a door 2 of an enclosed vessel 1, the door 2 sliding upward/downward, a drive roller 4 and an idle roller 5 are arranged up/down. Around both the rollers 4, 5 a running body 7 to run upward/downward is wound, and a counter-balance weight 10 is provided at one of upward/downward running parts in the running body 7 while the door 2 is connected to the other upward/downward running part. |
