Restraint device for traction sheaves

A restraint device for restraining a rigging used with a traction sheave in a hoisting device, said restraint device operable for installation proximate to where said rigging passes through said traction sheave and substantially at a position of maximum lifting of said rigging, wherein a gap is formed between an outer radius of said rigging and said restraint device such that the outer radius of said rigging is allowed to pass through said traction sheave while lateral displacement of said rigging is limited;

• wherein the restraint device comprises:
• at least one removable attachment point for coupling the restraint device to said traction sheave;
• a first edge operable for limiting said lateral displacement of said rigging;
• and
• a second edge opposite to the first edge, wherein the first and second edges approximate a contour of said traction sheave, said restraint device being substantially symmetrical in a longitudinal axis such that said restraint device can be rotated about said longitudinal axis to present said second edge for limiting said lateral displacement;
• and
• wherein said restrain device:
• is substantially symmetrical in an axis perpendicular to the longitudinal axis such that the restraint device can be rotated around said axis perpendicular to the longitudinal axis and coupled to said traction sheave to present third and fourth edges of said restraint device which limit said lateral displacement of said rigging;
• each of said edges are substantially identical in contour to one another;
• and
• each of said edges respectively has an indication of a degree of wear so that a user can flip the restraint device to any of said edges in order to replace one of said edges that is indicating wear.