PURPOSE: To raise the efficiency of soil discharge work by providing plural links rotatably connected with a bottom plate, a spring to physically energize the links outwards, and a soil carrier with a bag to be attached to the bottom plate and the links.
CONSTITUTION: A vertically movable rope 12 is rewound by a winch 11, and a carrier 14 is inserted into a shaft 1. When a bottom plate 15 reaches the bottom of the shaft 1, the first and second links 16 and 18 are turned by the forces of springs 21 and 22, and the carrier 14 is expanded into a net form 23. Soil including large gravels and cobble stones are put on the bottom plate 15, the rope 12 is rolled up, and the links 16 and 18 are turned against the springs 21 and 22 and the soil is embraced by the net 23. The soil is delivered on a hopper 6 by the winch 11, the chain 25 is coupled with the coupling metals 9, the rope 12 is rewound, the bottom plate 15 is turned around the horizontal shaft 7 as a support point, and the net 23 is expanded.
SAKUMA TOSHIO
ITONAGA HIROSHI
YAMAMOTO FUMIO
HITACHI SHIPBUILDING ENG CO