Abstract:
Elevator without counterweight, in which elevator there is a compensating system separating the roping portion of the hoisting ropes above the elevator car from the roping portion of the hoisting ropes below the elevator car and in which the rope tension is arranged by means of the compensating system to be greater in the portion of roping above the elevator car than in the portion of roping below the elevator car, installed by raising the travel height of the elevator at least once. When raising the travel height, the extension of the hoisting ropes is fed in via the compensating system or via the rope fastening in the compensating system.
Abstract:
Traction sheave elevator without counterweight and method for braking an elevator, in which elevator the elevator car is suspended by means of hoisting ropes consisting of a single rope or several parallel ropes, said elevator having a traction sheave which moves the elevator car by means of the hoisting ropes. In the elevator, when the elevator car is moving upwards in an emergency stop situation the braking of the operating brake of the elevator is at least partially prevented for at least a part of the stopping distance of the elevator.
Abstract:
An arrangement for reducing the displacement of an elevator car caused by a change in loading includes at least an elevator car configured to move up and down in an elevator hoistway and one or more counterweights, and also at least one rope element above the elevator car and at least one rope element below the elevator car and at least one pretensioner of the rope elements. The elevator car and counterweight are configured to be supported and moved via the rope elements and the pretensioner and rope pulleys, of which rope pulleys the first part are diverting pulleys, and the second part are traction sheaves. The arrangement additionally includes at least two hoisting machines. In the arrangement is a mechanism configured to lock at least two rope pulleys to be non-rotating at least during loading of the elevator car.
Abstract:
Un ascensor, preferiblemente un ascensor sin sala de máquinas, provisto de un cable de izado (9) revestido, en cuyo ascensor una máquina de izado se aplica a un conjunto de cables de izado por medio de una polea de tracción, comprendiendo dicho conjunto de cables de izado cables de izado (9) revestidos de sección transversal sustancialmente circular que tienen un núcleo que soporta la carga trenzado a partir de alambres (16) de acero sustancialmente fuertes de sección transversal circular y/o no circular, y en cuyo ascensor el conjunto de cables de izado soporta un contrapeso y una cabina de ascensor que se mueven en sus pistas respectivas, caracterizado por que - el cable de izado (9) es sustancialmente fino, en el que el núcleo que forma la parte que soporta la carga y que consiste de alambres de acero (16) tiene un diámetro de entre 2 y 10 mm, y en el que la relación del diámetro del núcleo de alambre de acero al grosor de la funda (17) es mayor que 4, preferiblemente entre 6-12, por ejemplo 8, y por que - el área en sección transversal de los alambres de acero (16) de cada cable de izado es mayor que 0,015 mm2 y menor que 0,2 mm2, y por que la resistencia de los alambres de acero (16) es mayor que 2000 N/mm2, y por que el núcleo de cada cable de izado (9) que está compuesto de alambres de acero (16) está revestido con una funda sustancialmente delgada (17) más blanda que el núcleo, que forma la superficie del cable de izado.
Abstract:
The invention relates to an elevator system and also to a method for ensuring the safety of an elevator system. The elevator system comprises a driving member (1) and also a hoisting means (3), which engages with the aforementioned driving member (1) by frictional traction. The elevator system comprises traction determination means (4, 5, 6A, 6B, 7) for determining the traction of the driving member (1), and the elevator system comprises a control circuit (4), which is configured to start a procedure ensuring the safety of the elevator system after the traction determination means (4, 5, 6A, 6B, 7) have detected that the traction of the driving member (1) has weakened.
Abstract:
An arrangement for equalizing rope force of an elevator may include: a hoisting machine, set of hoisting ropes, traction sheave, elevator car, guide rails, and compensating device. The hoisting machine may engage the hoisting ropes via the traction sheave. The elevator car may be at least partially supported by the hoisting ropes to move the elevator car. The elevator car may move along the guide rails. The compensating device may include first and second tensioning devices. The first tensioning device may be spaced apart from the second tensioning device. The first and second tensioning devices may be interconnected via a transmission device that transmits rotary motion. A first end of the set of hoisting ropes may be secured to a point in conjunction with the first tensioning device. A second end of the set of hoisting ropes may be secured to a point in conjunction with the second tensioning device.