昇降扉、箱体及び局所排気装置

摘要

To provide an ascent/descent door that enables a smooth and accurate lifting/lowering operation by making weight adjustment work more efficient, a box body, and a local exhaust device.SOLUTION: An ascent/descent door 13, which is looped over a wire rod support member and connected to a second end of a suspended wire rod having a main weight connected to a first end, is constituted to be capable of being lifted/lowered in a sliding manner by traveling of the suspended wire rod along the wire rod support member. The ascent/descent door comprises a door body 81, and a weight adjustment mechanism 83 that is provided in the door body 81 and that can adjust the weight of the ascent/descent door 13 itself.SELECTED DRAWING: Figure 5