Abstract:
The invention provides a cable and a belt for an elevator, which is provided with a resin coating body, high reliability, stable friction coefficient relative to sliding, improved wearing resistance and maintains long-term and stable drawing in various environment. The cable or belt comprises a tension element which bears tension along the length direction and a resin coating body which prevents the tension element from wearing and damaging. The resin coating body is mixed with insoluble solid additive particles in the resin base material.
Abstract:
A load bearing assembly (26) for an elevator system (20), the load bearing assembly comprising: at least one elongated tension member (32); a jacket (34) in the form of coating covering at least some of the at least one tension member, wherein the jacket material comprises a mixture of (a) a polymer material (64, 68); and (b) a halogen-free melamine based intumescent flame retardant (62) comprising at least one of melamine-cyanurate, melamine-phosphate, melamine pyrophosphate or melamine polyphosphate. Also a corresponding method of making such a load bearing assembly (26) is disclosed.
Abstract:
A method for determining a state of a suspension traction means (11) of an elevator system (1) is disclosed, the suspension traction means (11) comprising at least one electrically conductive cord (23) having a first end (80) and an opposite second end (85), the cord (23) having a wave impedance, wherein a signal generator (30) is electrically connected to the first end (80) of the cord (23) and a terminating resistor having a first resistance value matched to the wave impedance of the cord (23) is electrically connected to the second end (85) of the cord (23), the method comprising the steps: inputting an,in particular alternating,electrical excitation signal of the signal generator (30) into the first end (80) of the cord (23); at least one of measuring a reflection signal of the excitation signal at the first end (80) of the cord (23), and measuring a transmitted signal of the excitation signal at the second end (85) of the cord (23); and determining the state of the suspension traction means (11) based on a comparison of the excitation signal with at least one of the reflection signal and the transmitted signal.
Abstract:
A product comprising a plurality of interlaced yarns wherein at least a first yarn having a tensile strength, having a value TS in N/tex, said first yarn containing a plurality of UHMWPE fibres having a titer, having a value T in den, wherein the ratio T/TS is at least 5 den.tex/N. The tensile strength is obtained by adjusting the drawing ratio or the UHMWPE filaments / fibres accordingly. The product shows resistance to abrasion. The product can be a rope or round slings, comprising a sheath / jacket comprising said first yarn.
Abstract:
A rope having a cut-resistant jacket which includes a core comprised of a plurality of sub-ropes. The sub-ropes may be in a parallel strand configuration. The sub-ropes and the strands thereof may be made of fibers of a synthetic material, such as polyester, nylon, polypropylene, polyethylene, aramids, or acrylics. A cut-resistant jacket surrounds the core and is made from a material that has increased strength and/or abrasion resistance over the material of the core. The cut-resistant jacket may comprise steel wires and may further comprise braided steel wires or rope. The braided steel wires or rope may be covered with a plastic material for increased corrosion resistance. A filter layer may be disposed between the core and the cut-resistant jacket and may be wrapped around an outer surface of the core prior to the cut-resistant jacket being formed.
Abstract:
A cable or rope (10-1; 10-2), of the composite type, comprising: a inner metallic rope or core (10-A), consisting of a plurality of metal strands (10-A'), and a plurality of covering layers formed around the inner metallic core (10-A), wherein the covering layers comprise a first layer (10-B) of Kevlar formed around the inner metallic core (10-A), and a second layer (10-C) of polyester that is formed around and covers the first layer (10-B) of Kevlar, and wherein the first and the second coating layer, respectively Kevlar and polyester, are made with a fabric of braided yarns, or, according to a further embodiment (10-2) of the composite cable, the covering layers comprise a further third layer (10-C), of Kevlar and/or Dyneema, which is formed around and covers the second layer (10-C) of polyester, in turn formed and arranged around the first layer (10-B) of Kevlar. The cable or rope of the invention substantially innovates over the known conventional cables. The invention also relates to an innovative anchoring and safety system (20), based on the use of a rope and directed to put in safety roofs (RO) and the roofing of buildings against accidental falls from an height of the people working on them, comprising one or more anchorages (21), fixed to the roof (TE) to make safe and sure, in each of which the rope (E) is stably locked by screwing, so as not to create problems of instability for the people that is attached to the rope.