| 摘要 |
PROBLEM TO BE SOLVED: To easily remove a covering without damaging a corrosion prevention layer, and remove the covering at the position almost corresponding to an opening of an anchor hole by making the inside diameter of each inner peripheral blade, which is equipped with a pair of semi-circle inner peripheral blades and its heating means and is closably constituted, smaller than the inside diameter of an enclosure of the steel material and bigger than the outside diameter of a core material of the steel material. SOLUTION: This device is equipped with one pair of semi-circle inner peripheral blades 1, and carrying handles 2 integrated with each of the inner peripheral blades 1. A supporting axis 3 is provided between the inner peripheral blades 1 and the carrying handles 2, so that the inner peripheral blades 1 can be opened/closed by opening/closing the carrying handles 2. Each of the inner peripheral blades 1 is formed into a semi-circle shape, and a circular spacing 4 is constituted when one pair of the inner peripheral blades 1 are closed. The inside diameter of the circular spacing 4 is smaller than the inside diameter of the enclosure of an unbond PC steel stranded wire to be a cutting object, but bigger than the outside diameter of a core material of the stranded wire. Additionally, the inner peripheral blade 1 has a heater for heating the inner peripheral blade 1 to the temperature above the softening point of the covering, and it is preferable that the heater is built in the inner peripheral blade 1.
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