To improve the efficiency of earth removal by arranging a bucket, in which soil and sand are held, at the place of a blade and introducing the bucket to a spot, where an excavated pit is avoided, by driving the blade.
The earth removing device 100 is composed of a leader support frame 120 rotatably installed on a crane, a leader derricking jack 121 derricking the frame 120, a leader 113, a sliding frame 111 and a rotatable blade 110. When excavated materials in a casing tube 70 are removed, an excavating bucket 50, in which soil and sand are held, is wound up, and stopped on the side of the blade 110. The blade 110 is opened by a blade extruding jack 112, the bucket 50 placed at the upper section of an excavated pit is pushed out forward, and a shell 51 is opened at the spot of installation of a muck box, etc., avoiding the excavated pit and soil and sand are removed. The blade 110 is closed, the bucket 50 is returned to the upper section of the excavated pit, and excavation works are reopened. Accordingly, since the slewing operation of the crane is unnecessitated, an earth removing time can be shortened largely.
OKUMOTO KAZUNOBU
ISHISE FUMIHIKO
KUGE YOSHIHIRO
