DRAIN BOLT-NUT AND STAGNANT WATER PREVENTIVE DRAIN STRUCTURE OF STEEL BOX USING THIS DRAIN BOLT-NUT

摘要

PROBLEM TO BE SOLVED: To provide a drain bolt-nut dispensing with welding.;SOLUTION: In this stagnant water preventive drain structure of a steel box, a through-hole 131 is formed in a bottom plate 113 of a steel box-shaped structure, and water in the steel box-shaped structure is dropped and drained from its through-hole 131, and a drain bolt 1A is inserted from one into the through-hole 131 via the bottom plate 113, and a drain nut 1B is threadedly arranged in the other of its bottom plate 131, and a series of drain flow passages 13, 14 and 15 are formed in its drain bolt 1A and the drain nut 1B.;COPYRIGHT: (C)2007,JPO&INPIT