| 摘要 |
PROBLEM TO BE SOLVED: To provide a work machine for excavating a wide rectangular continuous hole which can excavate the wide rectangular continuous hole having a several-folded width at a stroke. SOLUTION: In the work machine for a wide rectangular continuous hole, a plurality of excavating rods which vertically movably support a rotation driving device on a support members erected on the ground are arranged so that a plurality of rows of the excavating rods standing in parallel with one another are placed in a longitudinal direction. The excavating rods are connected to the rotation driving device in a manner capable of transmitting rotation thereof, and hung from the device. Then each excavating rod mounts thereon a single or a plurality of rectangular hole excavators based on a Reuleaux mechanism which encloses the periphery of the rod and radially protrudes a triangular cutter. COPYRIGHT: (C)2007,JPO&INPIT
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