Steel cord for reinforcing rubber articles and rubber crawler and tire using same

Abstract

Provided is a steel cord for reinforcing rubber articles, which can prevent a reduction in the strength of the steel cord caused by twisting steel filaments, and a tire and a crawler using the steel cord. Provided is a steel cord 1 for reinforcing rubber articles formed by twisting a plurality of sheath strands 3 are twisted around a core strand 2, and the core strand 2 comprises: a core composed of two core filaments 2a aligned in parallel without being twisted; and at least one sheath composed of a plurality of sheath filaments 2b twisted around the core, and a diameter dc of the core filament 2a and a diameter ds of the sheath filament 2b satisfy the following expression (1): dc<ds   (1) and the tensile strength T (MPa) of the core filament 2a satisfies the relationship represented by the following expression (2): T<3650−17000×(dc−0.15)2   (2).

Dependencies are inferred from the claim text.