| 摘要 |
<p>The present invention relates to a canonical point setting device which hangs a weight on an end of a wire and drops the weight on an area in the vicinity of a vertical tunnel floor to set a canonical point which is an origin point of a horizontal tunnel to measure an average value of an X-axis and a Y-axis of the shaking weight to set a reference point, then horizontally aligns the weight on the vertical tunnel floor below the weight to install the weight, and then aligns a center point of a display unit for setting the origin point with the measured reference point to set the canonical point. The canonical point setting device according to the present invention comprises: a horizontal adjustment member to set levelness by using a leveler on a tunnel floor; a rotation member inserted into the horizontal adjustment member to rotate 360 degrees; a first axis adjustment member installed on an upper portion of the rotation member to adjust a center line; a second axis adjustment member which is installed on an upper portion of the first axis adjustment member and wherein a center of a moving direction crosses at a right angle; and a display member having a display unit to move the first axis adjustment member and the second axis adjustment member to align the first and the second axis adjustment member with a reference point measured by a measuring means.</p> |
