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AssigneeKone Corporation
InventorsEsko Aulanko, Jorma Mustalahti, Pekka Rantanen, Simo Makimattila
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A counterweight and an elevator car are suspended on a set of hoisting ropes. The elevator comprises one or more rope pulleys provided with rope grooves, one of said pulleys being a traction sheave driven by a drive machine and moving the set of hoisting ropes. At least one of the rope pulleys is provided with a coating bonded to the rope pulley and containing the rope grooves, said coating having a thickness that, at the bottom of the rope groove, is substantially less than half the thickness of the rope running in the rope groove and a hardness less than about 100 shoreA and greater than about 60 shoreA. In a preferred solution, the traction sheave is a rope pulley like this.
Elevator, in which a counterweight and an elevator car are suspended on a set of hoisting ropes consisting of hoisting ropes of substantially round cross-section and which comprises one or more rope pulleys provided with rope grooves, one of said pulleys being a traction sheave driven by a drive machine and moving the set of hoisting ropes, characterized in that at least one of said rope pulleys has against the hoisting rope a coating adhesively bonded to the rope pulley and containing the rope grooves, said coating having a thickness that, at the bottom of the rope groove, is substantially less than half the thickness of the rope running in the rope groove and a hardness less than about 100 shoreA and greater than about 60 shoreA.
Elevator as defined in any one of the preceding claims, characterized in that the thickness of the coating varies in the widthwise direction of the rope groove on the rope pulley.
Elevator as defined in any one of the preceding claims, characterized in that the hoisting ropes have a load-bearing part twisted from steel wires.
Traction sheave of an elevator, designed for hoisting ropes of substantially round cross-section, characterized in that the traction sheave has against the hoisting rope a coating adhesively bonded to the traction sheave and containing the rope grooves, said coating having a thickness that, at the bottom of the rope groove, is substantially less than half the thickness of the rope running in the rope groove and a hardness less than about 100 shoreA and greater than about 60 shoreA.
Dependencies are inferred from the claim text.