| 摘要 |
PROBLEM TO BE SOLVED: To provide a crack monitor capable of easily acquiring the progression state of cracks, using a simple constitution. SOLUTION: The first monitoring body 2, provided with a mark 4 on the upper surface 2b, is mounted on the first crack part W1, and the second monitoring body 3 is mounted on the second crack part W2 so that the long and the short sides in accordance with the mark 4. When a crack C proceeds and the first crack part W1 and the second crack part W2 change, the position of the second monitoring body 3 with respect to the mark 4 is changed, and the long and short sides of the second monitoring body 3 deviate from the mark 4. The the progression state of the crack can be acquired by visually confirming/monitoring this deviation. COPYRIGHT: (C)2008,JPO&INPIT
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