| 摘要 |
PROBLEM TO BE SOLVED: To provide a door opening/closing apparatus which has good airtightness regardless of a simple and easily-operable structure and is used in a heat-treating apparatus capable of preventing hot air from escaping to the outside. SOLUTION: This door opening/closing apparatus is constituted such that many vertically-divided small doors 2 are disposed on an opening 1 which is formed on a large door 101 of a thermostatic chamber 100 and to which a gasket 1a is fit, supported and elevated/lowered by an air cylinder 3, divided by an intermediate supporting unit 4 into, for example, upper ones 2-9 to 2-14 and lower closed ones 2-1 to 2-8 to open/close a doorway E disposed between the upper ones 2-9 to 2-14 and the lower ones 2-1 to 2-8 and guided by a linking member 5 consisting of a main linking member 51 and an auxiliary linking member 52 when the divided doors 2 are moved. The airtightness of the inside of the door opening/closing apparatus can be kept since the doors 2 are stuck closely to their gaskets without being rubbed though the doors 2 are elevated/lowered by rotation. When the door opening/closing apparatus is used in the heat-treating apparatus, the heat efficiency can be enhanced and the surrounding environment can be preserved.
|
