Pile hole enlarging bottom excavation hetsudo

摘要

(57) Abstract Objective The enlarging bottom excavation blade was installed in the bottom of the spiral featherEven with when, the fear of becoming the interference of earth removal, at the same time the revolving shaftThe enlarging bottom excavation blade is opened and closed securely with reversal. Constitution To install excavation blade 3 in the bottom of revolving shaft 1, continuationBeing, you install spiral feather 2. Rim section of spiral feather 2 lapTo the support cylinder 7 which is locked alongside the edge and 8 support bar 5 time motion andSleeve it constructs to cross direction unrestrictedly. In support bar 5 enlarging bottom excavation blade 6Directing to the lower part, sudden facilities it does, forming pile hole enlarging bottom excavation head 20It does.