| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of operation such as stone removal, pile drawing or the like by installing double edges and a catching pawl to the lower section of a single leg respectively, forming a large-mouth pinhole, a standard pinhole and a small-mouth pinhole to an intermediate section and manufacturing scissors through a pin with a washer. SOLUTION: Handles 3, 2 are mounted on single legs 8, 9, and scissors 11 are assembled. Large-mouth pinholes 12, standard pinholes 13 and small-mouth pinholes 14 are formed to the single legs 8, 9, and double edges 19 are set up to the scissors 11 and front edges 21 at the front ends of catching pawls 20. A box 16 for a crowbar is assembled into a box pinhole 15 for the crowbar. A lever receiving shaft 17 with the box and a rotating horizontal shaft are fitted to the box 16 for the crowbar, and a crowbar inserting port 18 is formed to the lever receiving shaft 17 with the box. The crowbar is inserted into the crowbar inserting port 18, and used as a lever. An auxiliary instrument for a survey-pit boring tool is manufactured by passing pins with washers into the standard pinholes 13 and assembling the pins, and a stake or the like is removed by using the catching pawls 20 and the front edges 21. Accordingly, even womenfolks and the aged can promote operation easily.
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