Elevator Ropes

Abstract

PROBLEM TO BE SOLVED: To provide wire rope maintained easily, having a long lifetime, high strength and a thin diameter, and suitable for compactification of an elevator system.SOLUTION: Wire rope comprises: a core 11; multiple side strands 12 arranged along external circumference of the core 11; and adjunct strands 13 provided to outside of the side strands 12 and in valleys between the side strands 12 neighboring each other. The side strands 12 are constructed by twisting multiple strands comprised of normal round wires. The adjunct strands 13 are constructed by twisting multiple strands, and external layer strands 32 are comprised of modified wires and the strands other than the external layer strands are comprised of normal round wires. Each circumcircle A of the side strand 12 and each circumcircle B of the adjunct strand touch an about equivalent circle internally.

Description

technical field [0001] The present invention relates to an improved construction of cables for running ropes used in elevators. Background technique [0002] Ropes can be broadly classified into standing ropes and moving ropes according to their usage. The stationary cable is at rest with a load applied to it, while the active cable passes over a sheave or is wound on a drum with a load applied to it. [0003] A typical movable cable is an elevator sling, and the cable 101 used as the elevator sling is, for example, as Figure 5 As shown, an elevator car 104 and a counterweight 105 are connected by a sheave 102 linked with a driving motor to change the direction of the cable 101 and a pulley 103 for changing the direction of the cable 101 . The elevator car 104 ascends and descends by the rotation of the sheave 102 and the traction force of the rope 101 . At this time, since a bending stress is applied to the cable 101 in a state where a load is applied to the cable 101 , ...

AI Technical Summary

Problems solved by technology

[0016] In this case, maintenance is required by the electromagnetic flaw detection method. Although this electromagnetic flaw detection method can detect whether a wire breakage has occurred, it cannot determine the exact location where the wire breakage occurred.

Also, it is impossible to disassemble the moving cable even if it is known that the part invisible to the naked eye has broken

Therefore, in the prior art, it takes a lot of labor, time and cost to maintain and inspect the cables

[0017] The cable disclosed by the above-mentioned Patent Document 2 is not only complicated in structure, labor-intensive and time-consuming in manufacture, and high in cost, but also has the problem that it is difficult to reduce the diameter.

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