Trail expansion and contraction walking type bed job machine

摘要

PURPOSE: To pull out expansion legs easily even when the expansion legs are sunk into a poor subsoil by ejecting compressed air from air nozzles formed to the outer circumferences of the lower end sections of two pairs of the expansion legs downward mounted to a machine body. ;CONSTITUTION: Two pairs of expansion legs 5A, 5B, one pair of which is composed of three or more, are installed downward to a machine body 1, and each expansion leg 5A, 5B is expanded and contracted vertically while being moved fore and aft for every pair, and can be made to walk and shift. In the leg expansion walk type water-bottom working machine, a plurality of air nozzles 11... are opened to the outer circumferences of the lower end sections of each expansion leg 5A, 5B. When the expansion legs 5A, 5B are expanded and contracted vertically and moved fore and aft and the legs 5A, 5B are sunk into a poor subsoil during forward movement or backward movement, compressed air is ejected from the air nozzles 11, and the legs 5A, 5B are pulled out easily.;COPYRIGHT: (C)1993,JPO&Japio