| 摘要 |
PROBLEM TO BE SOLVED: To reduce a cutting cost by obtaining an optional cutting depth by a wall sawing device which is miniaturized and small in output and has a blade of a small diameter. SOLUTION: In a method for cutting a structure, a cutting part of the structure 15 is cut in a prescribed depth by advancing the blade 2 to the structure 15 while it is rotated. An escape hole 16 into which the rotary shaft 4 of the blade 2 can be inserted and which turns to the forward/backward moving direction of the blade 2 is formed in the cutting part of the structure 15. When the blade 2 is advanced while being rotated, when the rotary shaft 4 of the blade 2 reaches the structure 15, the rotary shaft 4 is inserted into the escape hole 16 and moved in the escape hole 16 to follow the blade 2 to allow the advance of the blade 2. Since a cutting depth of at least the radius of the blade 2 is obtained, even by the miniaturized wall sawing device having the small diameter blade and the small output, the optional cutting depth is obtained, and the cutting cost can be largely reduced. COPYRIGHT: (C)2005,JPO&NCIPI
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