Underwater rising/falling device

Abstract

Provided is an underwater elevating apparatus, wherein the cable is not paid out unexpectedly by self-buoyancy while waiting underwater, excessive paying out of the cable may be prevented by a latch unit having simple mechanisms, and electric power does not be used needlessly. An underwater elevating apparatus (1), which rises or descends together with a flame (10) having an underwater observation apparatus (80) and buoyancy bodies (12) connected through a cable (11) anchored to the bottom, comprises: a stopper (51) halfway attached to the cable (11) at a lower position than the frame (10); a winch provided to the frame (10) for spooling and paying out of the cable (11); and a latch unit (30) provided to the frame (10), having opening or closing a plurality of hooks surrounding the cable (11), for causing the winch to stop spooling of the cable (11) while causing the plurality of hooks closed to seize the stopper (51) on the basis of a trigger according to pressure and contact with the stopper (51) by spooling thereof, and for causing the winch to start paying out of the cable from the plurality of hooks opened on the basis of the trigger by release of the stopper (51).

Dependencies are inferred from the claim text.