In a double-layered construction corrugated tube 23 of a wire harness 21 which are provided on an outer side of a high voltage cable 22 , an outer corrugated tube 26 is formed without a slit. In addition, an inner corrugated tube 27 is formed so as to be inserted from one end to the other end of the outer corrugated tube 26 with the high voltage cable 22 accommodated therein. The inner corrugated tube 27 is formed so that a pitch P 1 between adjacent ridge portions 38 thereof is narrower than a pitch P 2 between adjacent groove portions 30 of the outer corrugated tube 26.
1. A wire harness, comprising:
an electric wire; and
a double-layered corrugated tube having an outer corrugated tube and an inner corrugated tube each having circumferential extending ridge portions and groove portions provided alternately along an axial direction the tube;
wherein, in the double-layered corrugated tube, the outer corrugated tube is formed without a slit, and the inner corrugated tube is configured to slide inside the outer corrugated tube from one end to the other end of the outer corrugated tube with the electric wire accommodated in the inner corrugated tube,
wherein the ridge portions convex radially outward and includes a flat outer surface and the groove portions convex radially inward.
2. The wire harness as set forth in claim 1 , wherein the inner corrugated tube is formed so that inner surfaces of the groove portions thereof are allowed to be brought into a substantial contact with an outer surface of a covering of the electric wire in a circumferential direction.
3. The wire harness as set forth in claim 2 , wherein the inner corrugated tube is formed so that a pitch between adjacent ridge portions in the inner corrugated tube becomes narrower than a pitch between adjacent groove portions in the outer corrugated tube.
4. The wire harness as set forth in claim 3 , wherein ridge-side rounded portions having an arc-like shape in section are formed to the ridge portions of the inner corrugated tube and groove-side rounded portions having an arc-like shape in section are formed to the groove portions of the outer corrugated tube,
wherein the ridge-side rounded portions are brought into contact with the groove-side rounded portions.
5. The wire harness as set forth in claim 1 , wherein the wire harness is laid on a vehicle floor lower.