| 摘要 |
PROBLEM TO BE SOLVED: To provide a bushing with a lead having an insulating cover preventive of separation or breakage at its lead-out portion by minimizing the leakage of cold air from the lead-out portion of the lead wire. SOLUTION: The bushing having a through-hole 15 made in a heat insulating wall 14 in which a heat insulating material 13 is filled between an outer shell 11 and an inner shell 12, is fitted into the lead lead-out hole 17 of a tube body 16 fitted into the through-hole 15. It comprises a flange 21 provided at the end of a porcelain tube 22 using an elastomer material and a plurality of pterygiums 24 provided in spaced relation in the direction of the center axis of a portion of the porcelain tube 22 fitted to the lead lead-out hole 17, wherein a plurality of circular ribs 25 are provided on the outer periphery of the portion of the porcelain tube 22 fitted into the lead lead-out hole 17. The bushing 20 is separated in two while leaving a joint portion 27 at one place on the outer periphery portion, where a big stem 28 and a big stem hole 29 are provided on the opposite face on the rocking side. COPYRIGHT: (C)2004,JPO&NCIPI
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