Device for adjusting the discard state detection of high-strength fiber ropes and lifting gear comprising such a device

A device for determining a discard state of a high-strength fiber rope having a rope core comprising high-strength plastic fibers or strands and a rope sheath surrounding the rope core, comprising:

• an optical detector and/or a load spectrum counter, wherein a damage image of the rope sheath is detectable by the optical detector, wherein load cycles associated with the high-strength fiber rope are countable by the load spectrum counter;
• a detector, wherein a light absorption coefficient and/or a degree of reflection of the rope sheath is detectable by the detector;
• and
• an adaptor, wherein the discard state is determinable by an algorithm, wherein the algorithm is adaptable by the adapter based on a detected light absorption coefficient and/or the detected degree of reflection, wherein when a darker rope sheath is detected, a critical number of load cycles is decreasable by the adaptor, and wherein when a brighter rope sheath is detected, the critical number of load cycles is increasable by the adaptor.

A device for determining a discard state of a high-strength fiber rope having a rope core comprising high-strength plastic fibers or strands and a rope sheath surrounding the rope core, comprising:

• an optical detector and/or a load spectrum counter, wherein a damage image of the rope sheath is detectable by the optical detector, wherein load cycles associated with the high-strength fiber rope are countable by the load spectrum counter;
• an adaptor, wherein the discard state is determinable by an algorithm, and wherein the algorithm is adaptable by the adapter based on a detected light absorption coefficient and/or a detected degree of reflection;
• and
• a detector, wherein the light absorption coefficient and/or the degree of reflection of the rope sheath is detectable by the detector, wherein when the detector detects a light absorption coefficient of a >0.6 or a >0.75 for a heavy load spectrum in which the high-strength fiber rope has a service life of less than 50% of the maximum service life which the high-strength fiber rope has when subjected to a load spectrum leading into a range of the Wöhler fatigue strength, a critical number of load cycles is adjustable by the adaptor to less than 50% of the number of load cycles at which a fatigue strength range is reached, and wherein when the detector detects a light absorption coefficient of a <0.4 or a <0.3 for a lightweight load spectrum at which the high-strength fiber rope has a service life of at least 75% of the maximum service life, the critical number of load cycles is adjustable by the adaptor to 75% or more of the number of load cycles at which the fatigue strength range is reached.