| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction working machine which enables a working operator housed in a closed operator cabin to properly check an operating state of an object finishing mechanism. SOLUTION: Since a hydraulic crawler drill 1 makes the working operator WO drill a hole by means of a rock drill unit 4 in the state of being sealed in the operator cabin 6, its drilling sound is highly insulated by the operator cabin 6. Nevertheless, the drilling sound is inputted by a microphone 11 which is positioned outside the operator cabin 6, and reproduced by a speaker unit 13 which is positioned inside the operator cabin 6. In this case, the drilling sound is reproduced only in a frequency band appropriate for the checking of a drilling state. This enables the working operator WO housed in the sealed operator cabin 6 to properly check the operating state of the rock drill unit 4. COPYRIGHT: (C)2010,JPO&INPIT
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