| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect areas designated as those to be driven before floor material fixing nails are driven into a floor material by providing magnetic layers on the areas designated to be driven and magnetically detecting the magnetic layers so that the presence of the areas designated to be driven is discriminated. SOLUTION: A floor heating mat 10 includes pipings 12 composed of crosslinked polyethylene pipes for supplying heating medium such as hot water in the inner part of a base material sheet 11 made of foaming polyethylene, etc. At the end part of the floor heating mat 10, an inlet port for supplying hot water to the pipings 12 and an exhaust port are provided. Further, in the floor heating mat 10, small floor joists 14 are provided between the pipings 12. Magnetic sheets 15 made of a magnetic material are laminated on parts corresponding to the upper parts of the small joists 14 on the surface of the floor heating mat 10. Nails for fixing a floor material 22 such as a flooring material onto the floor heating mat 10 are made of a magnetic material such as iron. They are driven into positions where the small joists 14 exist, that is to say, positions (areas designated to be driven) to which the magnetic sheets 15 are bonded.</p> |
