| 摘要 |
<p>In a waterproof method for a wire end joint portion formed by integrally welding exposed parts of cores at ends of a plurality of wires forming a wiring harness to be installed in an automotive vehicle, a waterproof protection tube in which one end of a transparent heat shrinkable tube is closed by a sealing member is prepared, the heat shrinkable tube is expanded beforehand to have an inner diameter larger than the one when the heat shrinkable tube was formed, the wire end joint portion and a melted thermosetting waterproofing agent are inserted through an opening at the other end of the waterproof protection tube, the solidification starting temperature of the waterproofing agent is set higher than the shrinkage starting temperature of the heat shrinkable tube, heating is applied so that the inner diameter of the heat shrinkable tube shrinks to the one when the heat shrinkable tube was formed, wherein it is set such that the waterproofing agent is not solidified at the heating temperature and reaches the solidification starting temperature after the heat shrinkable tube is shrunk to have a set inner diameter, thereby being solidified.</p> |
