To improve a sheet-type door for lockage/water conduction gate which is used for preventing outflow of dust or driftwood into a sluice gate of a dam or a reservoir or for maintaining the quality of water as countermeasures of water pollution, turbid water or blue-green algae in the dams or lakes and marshes.
Other edges of a door sheet S than the upper edge thereof are fixed to an U-shaped gate frame G, and the upper edge is supported by a support rope 1. By winding up extension parts of one end or both ends of the support rope 1, the door sheet S can be closed with respect to the U-shaped gate frame G and by winding down the support rope 1 oppositely, the door sheet S can be opened with respect to the U-shaped gate frame G. In the sheet-type door, an inverse V-shaped weight 3 from the vicinity of both right and left lower corners to the vicinity of the center of an upper end with respect to the door sheet S and separate weights 4, 4 disposed obliquely upwards from the middle of the inverse V-shaped weight 3, respectively, are disposed in the door sheet S. The one door sheet S is opened fully to a shape approximate to the U-shaped gate frame G by the weight 3 and the weights 4, 4, thereby perfectly preventing trouble in lockage or water conduction.
TSUTSUMI OSAMU
JPH042127B2 | 1992-01-16 | |||
JP2001146734A | 2001-05-29 |
Norihiko Fujita