| 摘要 |
PROBLEM TO BE SOLVED: To easily flexibly-fold and remove a tip screw portion by supporting a tip screw portion of a separator bolt with an insertion hole supporting portion and a screw supporting portion of a folded bar body so as to flexibly fold it and by forming a rotation stopping portion of the separator bolt so as to support it in a playing engagement state. SOLUTION: When a tip screw portion 16 of a separator bolt 15 is inserted to the most deepest end of an insertion hole portion 6, a rotation stopping portion 17 of the separator bolt 15 is playingly engaged with a playing engagement groove 8 of the insertion hole portion 6. In this state, a screw supporting portion 9 supports the tip screw portion 16 of the separator bolt 15 with a distance from the depth end of the insertion hole portion 6. An insertion hole supporting portion 7 supports the base end side of the tip screw portion 16, that is a concrete wall side. A grabbing bar is bent at a bottleneck portion 18 of the separator bolt 15 when it is pressed upward, and is bent by pressing it downward, and the tip screw portion 16 is flexibly folded and removed from the bottleneck portion 18 of the separator bolt 15.
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