Elevator
AssigneeKone Corporation
InventorsEsko Aulanko, Jorma Mustalahti, Pekka Rantanen, Simo Makimattila
Life of this patent
Estimating the term…
Abstract
In an elevator, preferably one without machine room, a hoisting machine engages a set of hoisting ropes via a traction sheave, said set of hoisting ropes comprising hoisting ropes of substantially circular cross-section. The ropes have a load-bearing part twisted from steel wires of circular and/or non-circular cross-section. The steel wires of the hoisting ropes have a cross-sectional area larger than about 0.015 mm2 and smaller than about 0.2 mm2 and a strength exceeding about 2000 N/mm2. The elevator preferably has a hoisting machine of substantially light weight relative to the nominal load.
Claims16
Elevator, preferably an elevator without machine room, in which elevator a hoisting machine engages a set of hoisting ropes via a traction sheave, said set of hoisting ropes comprising hoisting ropes of substantially circular cross-section, said ropes having a load-bearing part twisted from steel wires of circular and/or non-circular cross-section, and in which elevator the hoisting ropes support a counterweight and an elevator car moving on their tracks, characterized in that the cross-sectional area of the steel wires of the hoisting ropes is larger than about 0.015 mm2 and smaller than about 0.2 mm2, and that the steel wires of the hoisting ropes have a strength exceeding about 2000 N/mm2.
Elevator as defined in any one of the preceding claims, characterized in that the weight of the hoisting machine of the elevator is at most about ⅕ of the weight of the nominal load of the elevator.
Elevator as defined in any one of the preceding claims, characterized in that the outer diameter of the traction sheave driven by the hoisting machine of the elevator is at most about 250 mm.
Elevator as defined in any one of the preceding claims, characterized in that the weight of the hoisting machine of the elevator is at most about 100 kg.
Elevator as defined in any one of the preceding claims, characterized in that the speed governor rope is thicker in diameter than the hoisting ropes.
Elevator as defined in any one of the preceding claims, characterized in that the speed governor rope is of the same thickness in diameter as the hoisting ropes.
Elevator as defined in any one of the preceding claims, characterized in that the weight of the hoisting machine of the elevator is at most about ⅙ of the nominal load, advantageously at most about ⅛ of the nominal load, most advantageously less than about {fraction (1/10)} of the nominal load.
Elevator as defined in any one of the preceding claims, characterized in that the total weight of the elevator machine and its supporting elements is at most ⅕ of the nominal load, preferably at most about ⅛ of the nominal load.
Elevator as defined in any one of the preceding claims, characterized in that the diameter of the pulleys (502) supporting the car is equal to or less than the height dimension of a horizontal beam (504) comprised in the structure supporting the car.
Elevator as defined in any one of the preceding claims, characterized in that the pulleys (502) are placed at least partially inside the beam (504).
Elevator as defined in any one of the preceding claims, characterized in that the track of the elevator car is in an elevator shaft.
Elevator as defined in any one of the preceding claims, characterized in that at least part of the spaces between strands and/or wires in the hoisting ropes is filled with rubber, urethane or some other medium of a substantially non-fluid nature.
Elevator as defined in any one of the preceding claims, characterized in that the hoisting ropes have a surface component made of rubber, urethane or some other non-metallic material.
Elevator as defined in any one of the preceding claims, characterized in that the traction sheave is coated at least in its rope grooves with a nonmetallic material.
Elevator as defined in any one of the preceding claims, characterized in that the traction sheave is made of a non-metallic material at least in the rim part comprising the rope grooves.
Dependencies are inferred from the claim text.