Positional measurement projecting device and mounting structure therefor
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United States of America Patent
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May 26, 1998
Grant Date -
N/A
app pub date -
Jun 18, 1996
filing date -
Dec 20, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A positional measurement projecting device and a mounting structure therefor, which are capable of easily carrying out replacement work and of increasing the efficiency of a tunnel constructing operation. A light receiver (36), receiving an incident laser beam (18), is provided in a body frame (32) of a projecting device (30), and a light emitter (42), emitting a beam (44), is provided rearwardly of the light receiver (36). The light emitter (42) is attached to an outgoing direction regulating device (43), and a local controller (50) adjusts the outgoing elevation angle and the outgoing horizontal angle of the beam (44) through the outgoing direction regulating device (43).
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