| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a drainage structure excellent in versatility with a simple structure, and capable of preventing water from overflowing to the upper drain passage side such as an eaves gutter.SOLUTION: The drainage structure is provided by interposing a catchment unit 3 between a drain port 11 and a down-pipe 2 formed on a bottom surface 1b of an upper eaves gutter 1. The catchment unit is provided with a catchment part 31 provided on the inflow port side of the down-pipe and a water discharge part 32 provided above the catchment part of becoming the drain port side. The catchment part is also formed in a measure shape of a wider cross section than an inflow port, and the water discharge part is provided with slits 32a, etc. for communicating the inside and outside of the catchment unit.</p> |
