| 摘要 |
PROBLEM TO BE SOLVED: To provide a marking device capable of eliminating the obstruction to the light projection by loading a tunnel excavating machine with a laser radiating unit at a position near the top of the excavating machine, and computing position and direction of the irradiation on the basis of plural reference points in rear of a tunnel so as to irradiate the working face with the laser beam. SOLUTION: A boom jumbo 14 as a moving body being a tunnel excavating machine is arranged near a working face 12 inside of a tunnel 10, and a laser radiating unit 26 is fitted onto a charging cage 24 provided near the top of a front part of the boom jumbo 14. Plural reference points 28 are provided in side walls in rear of the working face 12. Distance from the two reference points 28 is obtained by using a measuring direction control unit and a light wave measuring unit, and a position and direction computing unit computes the position data and the direction data of the laser radiating unit 26. Continuously, a irradiating direction correcting computing unit computes for correction of the position data and the direction data on the basis of the marking reference pattern, and a irradiating direction control unit controls an actuator so as to control the irradiating direction of the laser irradiating unit 26. With this structure, obstruction to the light projection is eliminated, and the accurate marking to the working face 12 is realized. |
