Abstract:
A method of manufacturing an elevator includes installing a movable supporting platform and an elevator car in the elevator hoistway; taking the elevator car into use to serve passengers and/or to transport goods; removing the elevator car from use; changing the service range of the elevator car to reach higher up in the elevator hoistway by lifting the supporting platform higher up in the elevator hoistway; and taking the elevator car back into use. The elevator is reeved to include construction-time hoisting roping, which includes one or more ropes, the longitudinal power transmission capacity of which is based at least essentially on non-metallic fibers in the longitudinal direction of the rope. In the method, guide rails to be fixed with guide rail brackets can additionally be installed by the aid of an installation device. An elevator arrangement can be used to perform the method.
Abstract:
Elevator, which includes at least an elevator car and a device for moving the elevator car, preferably along guide rails, and a counterweight, and one or more ropes, which rope connects the elevator car and the counterweight and is separate from the supporting function and passes around a diverting pulley mounted on the bottom end of the elevator hoistway. The rope comprises a power transmission part or a plurality of power transmission parts, for transmitting power in the longitudinal direction of the rope, which power transmission part is essentially fully of non-metallic material.
Abstract:
There is provided a steel cord including a plurality of untwisted core filaments of steel aligned in parallel, and a layer of sheath filaments of steel twisted around the core filaments so as to be unevenly distributed around the core filaments, wherein interstices between the filaments are maintained during vulcanization thereby achieving improved rubber penetration (sufficiently adhering rubber to the core filaments). Since the cross sectional length of the steel cord 10 is greater than the minimum cross sectional length, interstices A are maintained between sheath filaments 14 under the tension and pressure p of the surrounding rubber 16 applied to the steel cord 10 during vulcanization. Rubber 16 penetrates into the steel cord 10 through the interstices A, and sufficiently adhere to core filaments 12 to achieve high rubber penetration.
Abstract:
Steel cord used as a reinforcement for a belt layer in pneumatic tires. The steel cord is manufactured by forming a plurality of bends per strand length equivalent to one twist pitch on a strand, which constitutes an outer layer sheath, with the strand length equivalent to one twist pitch being a cycle, twisting these strands while the bends belonging to the same phase are aligned in a cord axial direction, and subjecting cord side surfaces to compression processing. As a result, flat side surface portions are formed, in which a plurality of strands forming the outer layer sheath are positioned substantially in the same plane. The steel cord thus formed is used in reinforcement plies for pneumatic radial tires such that the reinforcement plies are laminated so that the flat side surface portions are mutually parallel. Accordingly, the distribution of shearing stress acting on rubber between the flat side surface portions of the steel cord is made uniform and rigidity of a tire per amount of steel cord used is enhanced. Therefore, it is possible to reduce a weight of the steel cord used per tire and improve fuel efficiency by mounting such pneumatic radial tires on a vehicle.
Abstract:
A steel cord for the reinforcement of rubber articles has a three-layer twisting structure comprising a core (1) of 2 steel filaments, a middle sheath layer (2) of 6 steel filaments, and an outer sheath layer (3) of 11 steel filaments, in which a ratio ds/dc of filament diameter ds in the middle and outer sheath layers to filament diameter dc in the core is within a range of 1.15-1.5, and a twisting pitch of the core is not less than 20 mm. Such steel cord may be used as a reinforcing member in for example a heavy duty pneumatic radial tire or a conveyor belt.
Abstract:
A metallic cable (10) comprises a strand of identical helical shaped filaments (11, 12, 13) positioned beside and against each other such that each filament of the strand is in line contact with at least one other filament of the strand. The helixes of the filaments of the strand are sloped in a first direction. A single filament (14) is twisted with the strand in a direction opposite to said first direction. An apparatus and a method for manufacturing the metallic cable are also disclosed.
Abstract:
A method for manufacturing a hoisting rope (R,R',R",R"'), comprising the steps of providing a plurality of elongated composite members (1,1',1",1"'), which composite members (1,1',1",1"') are made of composite material comprising reinforcing fibers (f) in polymer matrix (m); arranging the composite members (1,1',1",1"') to form an elongated row (r,r',r",r"') of parallel composite members 1,1',1",1"', which row (r,r',r",r"') has a longitudinal direction (L), a thickness direction (T) and a width direction (W), and in which row (r,r',r",r"') the composite members (1,1',1",1"') are positioned side by side such that they are parallel to each other, and spaced apart from each other in width direction (W) of the row (r,r',r",r"'); directing plasma treatment on the outer surface of the composite members (1,1',1",1"'); embedding the composite members (1,1',1",1"') in fluid polymer material (2); and solidifying the polymer material wherein the composite members (1,1',1",1"') are embedded. A hoisting rope (R,R',R",R"') obtained with the method and an elevator comprising the hoisting rope (R,R',R",R"') are disclosed, too. The plasma treatment allows for an increased transmission ability of a hoisting rope compared to no plasma treatment.