Operator access door for underground buildings

摘要

The invention relates to an access door for underground buildings intended to house electronic, electrical, mechanical equipment or other equipment, configured by a main body (2) and an upper cover (1). According to the invention, the access door consists of a main lid (4) configured in a single metal part with reduced weight, resistant to mechanical stress, which is collapsible toward the outside with respect to a frame (3) integrated in the upper cover (1) by means of hinging elements (8) installed on its inner face and at the inner part of the frame (3). The main lid (4) likewise comprises a closure (6) and integrates therein an auxiliary lid (5) concealing and protecting the closure (6). The access door allows the operators to easily access the inside of the building in order to perform operation or maintenance work.