| 摘要 |
PROBLEM TO BE SOLVED: To provide a tape measure capable of specifically simply and accurately surveying an altitude and recognizing verticality to a ground on a wall face or the like. SOLUTION: On the tape measure having a case body combining an upper case 10 and a lower case 20, providing a fixed column 23 forming an opening part 201 on the side of the lower case, having a slit 24 on the peripheral face on the inside bottom face of the lower case, and hooking a hook part 261 on the terminal of a blade 26 in the slit, an extension and contraction rod 30 is installed on the side having the opening part in the case body, a through hole 31 is formed on the terminal of the extension and contraction rod, the blade is inserted from the through hole and pulled from the other end, and a weight 32 is fixed on the front end of the pulled blade.
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