Rope deflection and suitable synthetic fiber rope and their use
AssigneeInventio AG
InventorClaudio De Angelis
Life of this patent
Estimating the term…
Abstract
In a rope deflection, such as preferably a traction sheave drive for an elevator, the diameter at the rope contacting surface and the lay length of a synthetic fiber rope passing over it are related to each other in such a way that within the angle of wrap of the rope, each of the strands of the covering layer of strands lies on the traction sheave at least three times. This relationship achieves a permanently reliable rope drive with a synthetic fiber rope for use on pulleys or traction sheaves, with which irreversible displacements of strands in the covering layer of strands of the synthetic rope can be reliably avoided.
Claims11
A rope deflection comprising:
- a sheave having a circumferential rope contact surface;
- and
- a synthetic fiber rope having a plurality of load-bearing synthetic fiber strands laid in a twist with a predetermined lay length and contacting said contact surface along an arc of a circle, said arc being less than 360 degrees, said synthetic fiber rope contacting said contact surface along a length of at least three of said lay lengths.
A rope deflection comprising:
- a sheave having a plurality of circumferential grooves formed therein;
- and
- a plurality of synthetic fiber ropes each having a plurality of load-bearing synthetic fiber strands laid in a twist with a predetermined lay length and contacting an associated one of said grooves along an arc of a circle, said arc being less than 360 degrees, each said synthetic fiber rope contacting said associated groove along a length of at least three of said lay lengths.
A synthetic fiber rope for use with a rope deflection sheave comprising a rope having a plurality of load-bearing synthetic fiber strands laid in an outer layer, said synthetic fiber strands being laid in a twist with a predetermined lay length, said predetermined lay length being selected whereby when the rope contacts a surface of a rope deflection sheave along an arc of a circle defining an angle of wrap, each said synthetic fiber strand contacts the sheave surface at least three times.
A rope deflection comprising:
- a sheave having a circumferential rope contact surface;
- and
- a synthetic fiber rope having a plurality of load-bearing synthetic fiber strands laid in a twist with a predetermined lay length and contacting said contact surface along an arc of a circle, said arc being approximately 180 degrees, said synthetic fiber rope contacting said contact surface along a length of at least three of said lay lengths.
Dependencies are inferred from the claim text.