Patent ID: 11910546
Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The explosion-proof structure according to claim 1, comprising, a plurality of opening/closing members, each of the plurality of opening/closing members being identical to the opening/closing member,
wherein the plurality of opening/closing members comprises:
a first opening/closing member connected to an upper portion in a vertical direction of the peripheral portion; and
at least one second opening/closing member connected to a portion other than the upper portion in the vertical direction of the peripheral portion, wherein, in a state where the second ventilation port is opened, at least a part of the second opening/closing member overlaps the first opening/closing member on one surface side of the first opening/closing member in the normal direction.