| 摘要 |
PROBLEM TO BE SOLVED: To easily and efficiently set the exact position of anchor points even for non-skilled workers. SOLUTION: The jig is composed of 4 corner members 12A, 12B, 12C and 12D forming the 4 corners of a rectangular frame, and 4 side members 14A, 14B, 14C and 14D forming the 4 sides arranged slidably to the corner members 12 and being capable of controlling the intervals of the cornet members 12. Holes 16 for marking are provided to each of the 4 corner members 12.
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