| 摘要 |
PROBLEM TO BE SOLVED: To overcome the problem such that the construction of a conventional manhole is inefficient due to complicated processes and increased costs. SOLUTION: A manhole set device is composed of a positioning frame and a positioning ruler; a circular frame body of the positioning frame is provided with a plurality of finishing stake members and a plurality of height adjusting members; and the positioning ruler is composed of a ruler body and a pin which is provided in the central part of the ruler body. Preferably, the finishing stake members are provided at four places on cross-shaped lines, and the height adjusting member can be formed by screwing an adjust bolt into a nut which is fixed to the outer surface of the circular frame body. The positioning ruler can also be constituted by integrally fixing the pin to the ruler body, and constituted by detachably inserting the pin into a hole which is provided in the ruler body. COPYRIGHT: (C)2004,JPO
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