| 摘要 |
PROBLEM TO BE SOLVED: To protect an eaves gutter and a valley plate from corrosion caused by acid rain by installing an anticorrosive member of almost plate shape formed of a metal plate of zinc or the like with a high tendency of ionization at the upper face of a roof tile mainly near its end part facing a valley. SOLUTION: The center face of a body 2, formed in plate shape, of an anticorrosive member formed of a metal plate of zinc or a zinc alloy with a high tendency to be electric potential is provided with a plurality of slit holes 22 forming raised plates 23 by cutting and raising the body 2 in three directions to a height of about 3 mm to 5 mm and bending the long sides on the lower reaches side. A support plate 1 is placed over the lower face of the body 2, and the support plate 1 and the body 2 are inserted on the lower reaches side of a tile. Rainwater flowing down in the eaves direction from a roof face flows into a valley plate while being retained in the slit holes 22 of the anticorrosive member and passing a complicated passage since the raised plates 23 block the rainwater, but at this time, acid rain chemically reacts on metal with a high tendency to be electric potential such as zinc of the body 2 to moderate acidity toward neutral. A metallic eaves gutter and valley plate on the lower reaches side can therefore be prevented from corrosion.
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