초록 ▼

An overhead cable includes an outermost surface formed by twisting together a plurality of segment strands. A plurality of spiral grooves form recesses having substantially rectangular cross-sections and are provided at intervals in a circumferential direction of either the outer surface of the segm

An overhead cable includes an outermost surface formed by twisting together a plurality of segment strands. A plurality of spiral grooves form recesses having substantially rectangular cross-sections and are provided at intervals in a circumferential direction of either the outer surface of the segment strands or the outer surface regions of boundary portions where twisted segment strands adjoin each other. Thin segment strands and at least one thick segment strand form the outermost layer. A recessed portion is provided at one side surface among two surfaces of the segment strands forming the outermost layer, a projecting portion is provided at the other side surface, and the strands are twisted together so that the recessed portions and the projecting portions mate. The recessed and projecting portions formed at the two side surfaces of the segment strands mate with each other to form recess-projection mating portions, and the lengths of the contact of the recessed and projecting surfaces at the recess-projection mating portions is configured to be no more than 10% of the length of the recess-projection mating portions.

대표청구항 ▼

[ What is claimed is:] [1.]1. An overhead cable comprising:a tension-bearing core;a conductive layer provided at the outer circumference of said core; andan outermost layer formed by twisting together a plurality of segment strands at the outer circumference of said conductive layer,said outermost l

[ What is claimed is:] [1.]1. An overhead cable comprising:a tension-bearing core;a conductive layer provided at the outer circumference of said core; andan outermost layer formed by twisting together a plurality of segment strands at the outer circumference of said conductive layer,said outermost layer formed by the plurality of segment strands having at a part of an outer circumferential surface of said segment strands or outer circumferential surface regions where said segment strands are twisted together to adjoin each other at either one groove or a plurality of grooves that form a spiral shape along an outer surface of said outermost layer, each groove including a first surface opposite from and substantially parallel to a second surface and a bottom portion with a rectangular cross-section formed there between at intervals in the circumferential direction of the overhead cable,wherein at least one of said plurality of spiral grooves is formed to satisfy the following conditionwhere a width and a depth of the cross-section are W and h.