Disclosed is a steel wire rope for conveyor belts. The steel wire rope includes a central steel wire, a steel wire layer externally wound on the central steel wire, and a plurality of external steel wire strands. Each external steel wire strand includes a core steel wire and N external steel wires. The central steel wire, the steel wire layer externally wound on the central steel wire, and the plurality of external steel wire strands are wound into a steel wire rope for conveyor belts in one step. The steel wire layer is externally wound on the outer side of the central steel wire, the external steel wire strands are wound to wrap the outer side of the steel wire layer, and the external steel wire strands are in line contact with the steel wire layer.

Disclosed is a steel wire rope for conveyor belts. The steel wire rope includes a central steel wire, a steel wire layer externally wound on the central steel wire, and a plurality of external steel wire strands. Each external steel wire strand includes a core steel wire and N external steel wires. The central steel wire, the steel wire layer externally wound on the central steel wire, and the plurality of external steel wire strands are wound into a steel wire rope for conveyor belts in one step. The steel wire layer is externally wound on the outer side of the central steel wire, the external steel wire strands are wound to wrap the outer side of the steel wire layer, and the external steel wire strands are in line contact with the steel wire layer.

A steel cord for rubber reinforcement that has a construction with an outer layer and an inner strand surrounded by and adjacent to the outer layer, the inner strand having at least one steel filament with a number of N.sub.1 and an average diameter of d.sub.1 expressed in mm, the outer layer having steel filaments with a number of N.sub.2 and an average diameter of d.sub.2 expressed in mm. The inner strand has a torque T.sub.1 and the outer layer has a torque T.sub.2, the relation between T.sub.1 and T.sub.2 is defined. By doing this, the tip rise problem of the rubber ply reinforced by steel cords is reduced.

A steel cord for rubber reinforcement that has a construction with an outer layer and an inner strand surrounded by and adjacent to the outer layer, the inner strand having at least one steel filament with a number of N.sub.1 and an average diameter of d.sub.1 expressed in mm, the outer layer having steel filaments with a number of N.sub.2 and an average diameter of d.sub.2 expressed in mm. The inner strand has a torque T.sub.1 and the outer layer has a torque T.sub.2, the relation between T.sub.1 and T.sub.2 is defined. By doing this, the tip rise problem of the rubber ply reinforced by steel cords is reduced.