| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a complete and stable branch joint structure by preventing cracking from developing on a joint head portion as well as prevention of leakage or dust due to looseness at a mutual joint portion over a long period, in a common rail having a structure formed by welding a joint metal fitting to a main-piping rail. <P>SOLUTION: This common rail is structured so as to be tightened through a sleeve washer screwed into the joint head portion with the pressure at the joint head portion by screwing a tubular sleeve nipple of external thread system welded or brazed onto the main-piping rail with a box nut previously assembled into branch piping, and so that a thread between the sleeve nipple and the box nut may be inverse to a thread between the joint head portion and the sleeve washer. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
