| 摘要 |
PURPOSE: A multi hammer for reaming an excavation hole is provided to improve work efficiency by forming a structure which can accurately arrange a center part of a hammer body in an excavation hole. CONSTITUTION: A multi hammer for reaming an excavation hole comprises a hammer body(100), a piston, a center guide(103), and a bit(104). The hammer body comprises a torque supplier of an excavator, a joint connected to an air supplier, a hit space, and a bit mounting unit corresponding to the hit space. The center guide is protruded from the front end of the hammer body and guides excavating. The bit is installed in the bit mounting unit to hit the ground and is arranged covering the center guide.
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