Abstract:
The invention relates to a suspension arrangement for an elevator, which elevator preferably is an elevator without machine room and in which elevator the hoisting machine (4) is connected via a traction sheave (5) to hoisting ropes (3), by means of which the elevator car (1) is moved, and which hoisting machine (4) comprises at least a stator frame (26) secured to a mounting place in the elevator shaft and a traction sheave (5) and a rotor frame (25) forming a fixed assembly, which assembly is mounted with bearings so as to be rotatable with respect to the stator frame, and which hoisting machine (4) is secured to a stiffener (22) bracing the stator frame (26). The stiffener (22) comprises a support for mounting a bearing (23), said support being preferably situated below the traction sheave (5) and extending in a direction towards the hoisting machine, on which support is mounted with a bearing a freely rotating auxiliary diverting pulley (7).
Abstract:
An elevator roping arrangement includes: hoisting ropes; diverting pulleys; and a fixing and support arrangement. First and fourth diverting pulleys are disposed on the elevator car, while second and third diverting pulleys are disposed in an upper part of an elevator shaft. The hoisting ropes pass from a traction sheave to the diverting pulleys. The fixing and support arrangement is disposed at a top end of elevator car guide rails and includes two support beams. Each support beam is fixed at a first end to a wall of the shaft, extends from the first end to a second end away from the wall, and is fixed to a guide rail between the ends. A vertical plane is defined between the guide rails. At least one of the diverting pulleys is on an opposite side of the plane from the wall, and is disposed at a distance from the plane.
Abstract:
An elevator hoisting rope set (3) suspends a counterweight (2) and an elevator car (1). The elevator has one or more rope pulleys provided with rope grooves, one of said rope pulleys being a traction sheave (7) that moves the hoisting ropes (3). At least the traction sheave (7) has against the hoisting rope (3) a coating adhesively attached to it and increasing the coefficient of friction. At least the traction sheave (7) and the hoisting ropes (3) together form a material pair in which the hoisting ropes (3) bite into the traction sheave (7), maintaining a grip sufficient for the operation of the elevator even in an exceptional situation where the coating (102) increasing the coefficient of friction on the surface of the traction sheave (7) is lost.
Abstract:
Travelator, the conveyor of which comprises a frame, which comprises a stationary first frame part and a second frame part that moves in relation to it. The drive wheel is mounted on a bearing allowing rotation onto the first frame part. The power unit rotates the drive wheel. The diverting wheel is mounted on a bearing allowing free rotation onto the second frame part. The transport surfaces are connected to a traction element which is formed as an endless loop, and which is led to pass over the drive wheel and the diverting wheel. The tightening device is arranged to act between the first frame part and the second frame part to move the diverting wheel linearly away from the drive wheel in order to exert tightening force on the traction element. The travelator comprises identification means for identifying the drive status of the conveyor, and adjustment means for adjusting the tightening force of the tightening device to different force levels based on the drive status identified. In the method the drive status of the conveyor is identified, and the tightening force of the endless traction element of the conveyor of the travelator is adjusted on the basis of the drive status identified.
Abstract:
A handrail for a travelator, moving ramp or escalator, wherein the handrail frame (5) of the handrail comprises a first handrail frame part (9) fixedly mounted on the frame of the travelator and a second handrail frame part (10) with a turn-around guide (7) connected to it, the second handrail frame part (10) being guided to be movable in the direction of the handrail with respect to the first handrail frame part (9) between a mounting position (I) and a tensioning position (II), in which mounting position (I) the handrail belt can be removed from the handrail and/or mounted on the handrail, and in which tensioning position (II) the handrail belt is in a tensioned state; and that a tensioning device (8) has been fitted to move the second handrail frame part (10) and to lock it in position relative to the first handrail frame part (9).
Abstract:
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.
Abstract:
A set of elevators, e.g. an elevator group, is connected to a common power supply. The elevators are controlled by a common control system so that an elevator car having stopped is prevented from being dispatched in the up direction if, of the elevator cars of the elevators connected to the common power supply, more cars are moving upwards than are moving downwards.
Abstract:
A conveyor for use in a travelator for transporting passengers in a transport direction. The conveyor comprises a frame; a plurality of shafts mounted on the frame substantially transversely to the transport direction, each of the plurality of shafts being substantially parallel to one another and spaced apart from one another. A belt pulley pack is mounted on each of the shafts, each belt pulley pack comprising a plurality of belt pulleys mounted adjacent to one another. Each belt pulley comprises a mold-cast object comprising: a first side having a first aligning and coupling element formed therein; a second side opposite to the first side, the second side having a second aligning and coupling element fitted to match the first aligning and coupling element, so that the first and second aligning and coupling elements of adjacent belt pulleys align and couple the adjacent belt pulleys together in a shape-locking manner. A moving transport surface comprises a plurality of mutually parallel endless belt loops, each of the belt loops passing over two belt pulleys located on different shafts.
Abstract:
Elevator, in which the elevator car is suspended by means of hoisting ropes (3) consisting of a single rope or several parallel ropes, said elevator having a traction sheave (5) which moves the elevator car (1) by means of the hoisting ropes (3). The elevator has rope portions of the hoisting ropes going upwards and downwards from the elevator car. The rope portions going upwards from the elevator car are under a first rope tension (T1) and the rope portions going downwards from the elevator car are under a second rope tension (T2). The elevator has a compensating system (16) acting on the hoisting ropes for equalizing and/or compensating the rope tension and/or rope elongation and/or keeping the ratio (T1/T2) between the first rope tension and the second rope tension substantially constant.
Abstract:
The conveyor of a travelator comprises a number of shafts and a number of mutually parallel endless belts. The conveyor comprises a number of conveyor modules successively connected to each other with a connecting section between them. The belts in the connecting section are arranged to be loosenable so that at least one shaft over which the belts to be loosened are passed is detachable so as to allow the conveyor modules to be released from each other. To release a conveyor module, at least one shaft on which the belt loops in the connecting section turn over is moved in relation to another shaft to slacken the belt loops. The shaft over which the loosened belt loops are passed is detached and removed from the belt loops. The detached conveyor module is removed for maintenance and/or replaced. In the assembly, a number of conveyor modules are provided, the conveyor modules are placed one after the other and connected to each other in the connecting section by belt loops and at least one detachably mounted shaft, which is placed in the belt loops in the connecting section. At least one of the shafts over which the belt loops in the connecting section are passed is moved to tighten the belt loops and to form a substantially continuous conveyor surface across the connecting section.