| 摘要 |
PROBLEM TO BE SOLVED: To improve the workability of a ready mixed-concrete spotting pin, by arranging a spotting portion at a lower end of an elastic barrel to be attached to an erect reinforcement, and positioning the spotting portion on a concrete finish level. SOLUTION: A ready mixed-concrete spotting pin 1 is formed by arranging a spotting portion 4 at a lower end of a barrel 3 having elasticity, forming a pinch 1 at an upper portion of the barrel 3, and forming a notch 2 to engage with a horizontal reinforcement or the like, in an upside portion of a midpoint of the barrel 3. When ready mixed-concrete is placed in an earthen floor or the like, the barrel 3 is fitted onto an erect reinforcement 5 or the like and fixed beforehand, and the spotting portion 4 is horizontally positioned to a finish portion 6 of the ready mixed-concrete. Further, in place of the notch 2, a pair of upper and lower retaining members may be formed at an upper end of the barrel 3, as needed, which engage with the horizontal reinforcement or the like, to thereby prevent vertical displacement of the barrel 3. Thus, a marker is not buried in concrete as in a conventional adhesive tape, and the finish location can be easily confirmed and the concrete earthen floor can be easily constructed.
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