The present invention in cross-section a circular main pipe without the partition, then pumping the gas to the high pressure air by the air compressor during the flying, water (sea water, fresh water) during the settlement motorized, and then pumped water using an engine pump , to provide a sink-float-type cage to make these flying-subsidence work in a short period of time. An inside, there is only one room, respectively buoyancy body 1,1 consisting of a radius of curvature different plurality of annular main pipe of large and small, in these buoyancy, air intake and outlet 2, the Mizutori inlet and outlet 3, one or a plurality of provided in the buoyant body has a suitable thickness, the overall shape is installed a plurality of buoyancy devices 4 formed of an L-shaped stanchion hollow , the horizontal portion of the buoyancy device is provided with a retaining portion for retaining the buoyancy and the vertical section of the buoyancy device is equipped with a handrail pipe 5, further, the buoyancy device, compressed air The inlet is provided, and the bottom of the buoyancy device is provided with a water ingress-leaching opening. .BACKGROUND【課題】仕切りをせず断面が円形のメインパイプに、浮上時には空気圧縮機による高圧空気を圧送気し、沈下時には水(海水・淡水)電動式、及びエンジン式ポンプを用いて圧送水して、これらの浮上・沈下作業を短時間で行なう浮沈式生け簀を提供する。【解決手段】内部に、1つの部屋しか存在しない、大・小の曲率半径の異なる複数の環状メインパイプからなる浮力体1,1′をそれぞれ設け、これら浮力体には、空気取入・出口2と、水取入・出口3を、1または複数個設け、浮力体には、適宜な厚みを有し、中空で全体の形状がL字状スタンションからなる浮力調整装置4を複数個設置し、浮力調整装置の水平部には、浮力体を抱持する抱持部を設け、また、浮力調整装置の垂直部には、手摺パイプ5を装着し、さらに、浮力調整装置には、圧縮空気取入口を設け、かつ、浮力調整装置の底部には水侵入・侵出口を設けた。【選択図】図1
