SKIN PLATE OF DOOR BODY OF GATE, GIRDER MATERIAL OF DOOR BODY OF GATE, GUSSET PLATE OF DOOR BODY OF GATE, DOOR CONTACT OF GATE, AND PRODUCTS FOR WATER CHANNELS, RIVERS, LAKES, AND COASTS OR PARTS THEREFORE, AND STEPS OF ADMINISTRATIVE BRIDGE

摘要

PROBLEM TO BE SOLVED: To provide the skin plate of the door body of a gate, the girder material of the door body of the gate, the gusset plate of the door body of the gate, the door body of the gate, and the door contact of the gate capable of increasing the strength of a molding and reducing a molding time by increasing a molding pressure/molding temperature in a hand lay up method. SOLUTION: The door body 1 of the gate is assembled by connecting a flat plate-like skin plate 2, five vertical girders 3 as girder materials increasing the strength of the skin plate, two types of short lateral girders 4 and 5 as girder materials for reinforcing by joining these five vertical girders 3 to each other, and a gusset plate 3b installed on the vertical girders 3 to prevent the door body 1 from being twisted or deformed by using a large number of stainless steel bolts and nuts. The flat plate-like skin plate 2 is formed by pressurizing a laminate by a pressing machine while heating at a temperature of approximately 140°C to extrude air in the laminate so as to form a dense structure, and hardening a resin in a short time by heating at a high temperature and forming the molding as an FRP molding with higher strength. COPYRIGHT: (C)2005,JPO&NCIPI