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A holding device with a chain net without a power unit was developed for automation and labor reduction in lifting heavy objects. The device has been successfully applied to the removal of wave-dissipating blocks. For the other use, it was applied to the recovery of hydrofoils from the seabed. This paper presents the outline of the device, model experiment for deep waters, and two cases of recovery...
A hydrofoil of ship sank to seabed for accident. Since the area was as deep as the depth of 180 m, the recovery by divers was difficult. Therefore, holding device with net chain used This device has used to remove wave-dissipating blocks until now. For the other use, it is utilized for the first time. Recovery work of the hydrofoil was carried out in the southwestern area in the Sea of Japan on July...
A device for transferring wave-dissipating blocks was developed using net chains to allow for automation and labor saving. The device spreads net chains over a block and then tightens the net chains using a wire rope connected to a crane to lift the block. A model device was used to conduct a transfer experiment under several visibility conditions. A practical device was produced, and transfer work...
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