| 摘要 |
PROBLEM TO BE SOLVED: To expand a lifting amount of excavated earth and sand approximately 2-3 times more than that of a conventional hammer grab or the like. SOLUTION: An openable/closable shell 46 to function as a sand and earth grasping part is mounted in the lower part of a cylindrical bucket body 45 which is in concentric with a yoke 44 and functions as an earth and sand storage part. A hanging sleeve 60 is supported by the yoke 44 so as to be ascendable and descendable, and a switching means is formed of a slot 67 and a lock lever 65 which are formed in the hanging sleeve 60. The closing action of the shell 46 is carried out in accordance with the pull-up operation of a rope 43. An actual operating state in which a whole bucket 41 is hung with the rope 43 while the closing of the shell 46 is completed and a non-operating state in which the whole bucket 41 is hung with the rope 43 while the shell 46 is opened are selectively switched. COPYRIGHT: (C)2007,JPO&INPIT
|
