Wrapped steel wire

Abstract

A steel cable rope well-suited for the application to an elevator or a cargo-handling machine, in which each of side strands is constructed by twisting ordinary linear members together with at least one resinous linear member that is larger in diameter than each of the ordinary linear members. Owing to the existence of the resinous linear member of the relatively larger diameter, gaps are respectively defined between the individual side stands and a core rope and between the respectively adjacent side strands, and a resin for outer layer coating is pressed and packed through the gaps, thereby to prevent wear ascribable to the touch between a core rope and the outer side strands, as well as wear ascribable to the touch between the adjacent outer side strands, and wear ascribable to the metal touch between a sheave and the outer side strands.

Description

technical field [0001] The invention relates to a sheathed steel wire rope suitable for use as a moving cable of an elevator, cargo handling machinery, etc. Background technique [0002] The moving ropes used in cargo handling machines represented by elevators and cranes are reeled up while being moved by pulleys. Therefore, it is known that there are severe conditions in which the entire rope is subjected to tension and bending. [0003] In the past, as this kind of dynamic rope, in accordance with JIS·G·3525 and 3546, etc., a rope constructed in such a way that a plurality of side strands are arranged on the outer peripheral surface of a rope core made of fibers or steel strands or steel wire ropes has been used. wires and twist them together. [0004] In this structure, however, a high surface pressure is generated on the core and the side strands, and since the rope is bent by a pulley or the like, friction of the core against the side strands occurs. Thus, when the ro...

AI Technical Summary

Problems solved by technology

According to this prior art, although metal contact between the core and the side strands is prevented, it is difficult to maintain an appropriate distance between the side strands

Therefore, the side strands rub against each other and tend to fray

In addition, the pulleys and the side strands usually slide relative to each other in metal contact, so the pulleys with low hardness are worn out, so there is a problem that the replacement of expensive pulleys is troublesome and time-consuming.

Also, if oil is applied to reduce wear, the coefficient of friction between the pulley and the rope is changed, slipping occurs between the pulley and the rope, and as a result, the rotation of the pulley cannot be accurately transmitted to the rope

As a result, there is such a problem that the position control accuracy of objects connected to the ropes (such as elevator cars, loading and unloading, etc.) is reduced, and it is necessary to use pulleys with special groove processing as the pulleys.

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