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US 10,399,819 B2Granted
Elevator arrangement
AssigneeKone Corporation
InventorsEsko Aulanko, Matti Räsänen
Life of this patent
Estimating the term…
Abstract
The object of the invention is an elevator arrangement, which comprises at least two elevator cars that are connected to each other with suspension ropes or corresponding and are configured to move simultaneously with each other and reciprocally in an elevator hoistway, and a hoisting machine provided with at least one traction sheave or corresponding. The arrangement comprises at least one compensation means for compensating positioning inaccuracies caused by loading of the elevator cars.
Claims13
An elevator system comprising:
- elevator cars including at least a first elevator car and a second elevator car, the first elevator car and the second elevator car connected via suspension ropes and a traction belt such that the first elevator car and the second elevator car configured to simultaneously move reciprocally in an elevator hoistway;
- a hoisting machine including at least one traction sheave configured to move the traction belt;
- and
- compensators including a first pretensioning device and a second pretension device that are each secured to fixing points such that the traction belt extends from the first pretensioning device secured to a first one of the fixing points to a pair of diverting pulleys attached to a bottom of the first elevator car and around the at least one traction sheave onto a second pair of diverting pulleys attached to a bottom of the second elevator car, and terminates at the second pretensioning device secured to a second one of the fixing points, wherein
- each of the first pretension device and the second pretensioning device includes a roller, an adjustor, a spring and a u-shaped frame having a pair of side flanges between a base to form an interior of the frame, the interior of the frame houses the roller and the adjustor, the spring having a first end extending from the base in a direction perpendicular to a face of the base and a second end connected to the roller via a tensioning cable, and the adjustor configured to rotate along with the roller about an axis of rotation of a shaft of the roller and the adjustor that extends between fixing holes in the side flanges, the adjustor including an outer surface that is spirally eccentric with respect to the axis of rotation that corresponds to a spring constant of the spring such that the tensioning cable runs from the spring, about an eccentric spiral on the outer surface of the adjustor and attaches to adjuster, and the traction belt extends from the roller in a direction perpendicular to a direction of restoring force of the spring and onward towards one of the first elevator car and the second elevator car to maintain an alignment of the first elevator car at a sill of a first floor and the second elevator car at a sill of a second floor by applying a constant pre-tensioning force to the traction belt to compensate for positioning inaccuracies in each of the first elevator car and the second elevator car caused by loading of one or more of the elevator cars.
2 more elements
An elevator system comprising:
- a suspension rope and a traction belt connecting a first elevator car and a second elevator car;
- and
- compensators configured to maintain an alignment of the first elevator car at a sill of a first floor and the second elevator car at a sill of a second floor by compensating for differences in loads between the first elevator car and the second elevator car, the compensators including pretensioning devices, the compensators each being secured to fixing points such that the traction belt extends from a first one of the compensators secured to a first one of the fixing points to a pair of diverting pulleys attached to a bottom of the first elevator car and around at least one traction sheave onto a second pair of diverting pulleys attached to a bottom of the second elevator car, and terminates at a second one of the compensators secured to a second one of the fixing points, wherein
- each of the pretensioning devices include a roller, an adjustor, a spring and a u-shaped frame having a pair of side flanges between a base to form an interior of the frame, the interior of the frame houses the roller and the adjustor, the spring having a first end extending from the base in a direction perpendicular to a face of the base and a second end connected to the roller via a tensioning cable, and the adjustor configured to rotate along with the roller about an axis of rotation of a shaft of the roller and the adjustor that extends between fixing holes in the side flanges, the adjustor including an outer surface that is spirally eccentric with respect to the axis of rotation that corresponds to a spring constant of the spring such that the tensioning cable runs from the spring, about an eccentric spiral on the outer surface of the adjustor and attaches to adjuster, and the traction belt extends from the roller in a direction perpendicular to a direction of restoring force of the spring and onward towards one of the first elevator car and the second elevator car to provide a constant tensioning force in the traction belt irrespective of the loads in the first elevator car and the second elevator car.
1 more element
Dependencies are inferred from the claim text.