The invention relates to a method for determining the replacement state of wear of a rope made of a textile fibre material, wherein, in the course of using the rope, the elongation of the rope is monitored over its entire length and the rope is discarded if the elongation of the rope over the entire length exceeds a predetermined maximum value (%). The method according to the invention is characterized in that also the local elongation of a discrete rope section is monitored and the rope is discarded if the local elongation of the rope section exceeds a predetermined maximum value (%), with the maximum value of the local elongation of the rope section being greater than the maximum value of the elongation of the rope over the entire length.

The present invention relates to a high-strength fibre rope for hoisting equipment like cranes having a rope core (11) comprising high-strength synthetic fibres or strands (4) as well as a sheathing (2) surrounding the rope core (11) and indicating wear, wherein the sheathing (2) has at least a sheath layer, in which the synthetic fibres having different wear resistance and/or tensile strength and/or bending fatigue are interwoven with each other.

The invention relates to a method for monitoring condition of a rope of a hoisting device, which rope comprises one or more load bearing members oriented to extend parallel with longitudinal direction of the rope throughout the length thereof. The method comprises measuring strains of one or more portions of a load bearing member of the rope; and comparing the measured strains of one or more portions of a load bearing member of the rope with at least one reference. The invention also relates to a hoisting device implementing the method.

An armored DSS cable includes: an inner layer part including a first rope helically wound; and a surface layer part including an optical fiber module and a plurality of third ropes, the optical fiber module having an optical fiber and a plurality of second ropes helically surrounding the optical fiber and having a smaller outer diameter than the first rope, the third ropes having a larger outer diameter than the first rope, such that the optical fiber module and the third ropes are arranged on an identical circle and helically wound, wherein the inner layer part and the surface layer part are formed concentrically.

The invention is directed to a synthetic hoisting rope comprising a solid core surrounded by a first braided layer of a first set of strands that is surrounded by a second braided layer of a second set of strands.

A water safety rope and alarm system, comprising a rope mounted adjacent to a waterline of a marine or aquatic structure; a switch connected to the rope and configured to be triggered when the rope is tensioned; and an alarm connected to the switch and configured to produce an alarm signal when the switch is triggered.

The condition of a rope (20) is monitored according to the following steps: 1) providing a rope (20) with plastic material (22) inside the rope (20) and strength members (24, 28) present at least at the radially outer surface of the rope (20); 2) monitoring the rope (20) during its lifetime until parts of the plastic material (25) move to the radially outer surface until they become detectable at the outer surface of the rope (20).

A hoisting device rope has a width larger than a thickness thereof in a transverse direction of the rope. The rope includes a load-bearing part made of a composite material, the composite material including non-metallic reinforcing fibers, which include carbon fiber or glass fiber, in a polymer matrix. An elevator includes a drive sheave, an elevator car and a rope system for moving the elevator car by means of the drive sheave. The rope system includes at least one rope that has a width that is larger than a thickness thereof in a transverse direction of the rope. The rope includes a load-bearing part made of a composite material. The composite material includes reinforcing fibers in a polymer matrix.

A hoisting device rope has a width larger than a thickness thereof in a transverse direction of the rope. The rope includes a load-bearing part made of a composite material, the composite material including non-metallic reinforcing fibers, which include carbon fiber or glass fiber, in a polymer matrix. An elevator includes a drive sheave, an elevator car and a rope system for moving the elevator car by means of the drive sheave. The rope system includes at least one rope that has a width that is larger than a thickness thereof in a transverse direction of the rope. The rope includes a load-bearing part made of a composite material. The composite material includes reinforcing fibers in a polymer matrix.

The present invention relates to an apparatus for recognizing the replacement state of a high-strength fiber rope for lifting gear such as cranes as well as to a lifting gear such as a crane in which such a high-strength fiber rope is installed. It is the underlying object of the present invention to provide an improved apparatus for determining the replacement state of a high-strength fiber rope and to provide improved lifting gear having such a fiber rope that avoid the disadvantages of the prior art and further develop the latter in an advantageous manner. To be able to more easily determine the respective degree of damage of the jacket and thus the closeness to the imminent replacement state of the rope, the apparatus is provided with a reference damage memory in which reference representations of the rope with different degrees of damage to the jacket of the rope are contained to allow for an optical comparison of an actual image of the rope with the stored reference representations and thus, determination of the replacement state.