| 摘要 |
PROBLEM TO BE SOLVED: To provide a preservation structure for a ferrule structural body capable of providing positive insulation between a flange type ferrule and a saddle body of a different metal fixed to the ferrule via a fastener and between the fastener and the ferrule by a simple structure, and positively preventing corrosion of both. SOLUTION: Electrolytic corrosions of the ferrule 2, the saddle body 4 and a bolt B can be positively prevented by providing a composition of the bolt B screwed in a screw hole 14 of the saddle body 4 via a plurality of through holes 15 formed on a flange 6 of the ferrule 2 and fixing the flange 6 of the ferrule 2 to the saddle body 4, a first insulator 16 interposed between the flange 6 and a saddle abutting part 5, and a second insulator 18 fit on an outer circumference of the bolt B, attached inside the through holes 15, and providing insulation between the bolt B and the flange 6, and providing electrical insulation between different metals.
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