Wire harness

Patent metadata

Field	Value
Publication number	US-11538608-B2
Application number	US-202017090613-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 6, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A wire harness includes an electric wire, a braided conductor covering the electric wire, a grommet having a tubular insertion portion through which the electric wire and the braided conductor are inserted, a water stop sheet sandwiched between an inner peripheral surface of the insertion portion and the braided conductor, and a fixture attached to the insertion portion so as to reduce a diameter of the insertion portion. The water stop sheet includes a base material layer having a plurality of pores communicating with each other in a thickness direction of the water stop sheet and a sealing compound layer laminated on the base material layer. The sealing compound layer is deformed so as to enter gaps between thin conductor wires constituting the braided conductor and the pores of the base material layer.

First claim

What is claimed is:

1. A wire harness comprising:
an electric wire;
a braided conductor covering the electric wire;
a grommet having a tubular insertion portion through which the electric wire and the braided conductor are inserted;
a water stop sheet sandwiched between an inner peripheral surface of the insertion portion and the braided conductor; and
a fixture attached to the insertion portion so as to reduce a diameter of the insertion portion,
wherein the water stop sheet includes a base material layer having a plurality of pores communicating with each other in a thickness direction of the water stop sheet and a sealing compound layer laminated on the base material layer, and the fixture reduces the diameter of the insertion portion such that the sealing compound layer deforms to enter gaps between thin conductor wires constituting the braided conductor and the pores of the base material layer.

2. The wire harness according to claim 1 ,
wherein the sealing compound layer has a rubber component containing butyl rubber, and
wherein the base material layer has a mesh material formed of fine mesh wires.

3. The wire harness according to claim 1 , further comprising:
a plurality of the electric wires; and
an inter-wire water stop material filling a gap between the plurality of electric wires,
wherein the braided conductor collectively covers the plurality of electric wires and the inter-wire water stop material.

4. A method for manufacturing a wire harness including an electric wire, a braided conductor covering the electric wire, a grommet having a tubular insertion portion through which the electric wire and the braided conductor are inserted, a water stop sheet sandwiched between an inner peripheral surface of the insertion portion and the braided conductor, and a fixture attached to the insertion portion so as to reduce a diameter of the insertion portion, the method comprising:
preparing the electric wire, the braided conductor, the grommet, the water stop sheet including a base material layer having a plurality of pores communicating with each other in a thickness direction of the water stop sheet and a sealing compound layer laminated on the base material layer, and the fixture;
winding cylindrically the water stop sheet around the electric wire such that the water stop sheet is in close contact with the outer peripheral surface of the electric wire;
inserting the electric wire around which the water stop sheet is wound into an insertion portion of the grommet; and
tightening the insertion portion by the fixture so as to reduce a diameter of the insertion portion after winding the fixture around an outer peripheral surface of the insertion portion in a state that the water stop sheet is sandwiched between an inner peripheral surface of the insertion portion and the braided conductor,
wherein in the tightening, the sealing compound layer deforms to enter gaps between thin conductor wires constituting the braided conductor and the pores of the base material layer.

Assignees

• Yazaki Corp

Inventors

• Tohyama Eiichi
• Tsukuda Takashi
• Shinohara Kei

Classifications

• H02G3/22

  Installations of cables or lines through walls, floors or ceilings, e.g. into buildings · CPC title

• H01B7/17

  Protection against damage caused by external factors, e.g. sheaths or armouring · CPC title

• H01B7/282 Primary

  Preventing penetration of fluid {, e.g. water or humidity,} into conductor or cable · CPC title

• H01B13/26

  by winding, braiding or longitudinal lapping · CPC title

• H01B7/28

  {Protection against damage caused} by moisture, corrosion, chemical attack or weather · CPC title