Elevator

Abstract

Elevator, preferably an elevator without machine room. In the elevator, a hoisting machine engages a set of hoisting ropes by means of a traction sheave. The set of hoisting ropes comprises hoisting ropes of substantially circular cross-section. The hoisting ropes support a counterweight and an elevator car moving on their respective tracks. The hoisting rope has a thickness below 8 mm and/or the diameter of the traction sheave is smaller than 320 mm. The contact angle between the hoisting rope or hoisting ropes and the traction sheave is larger than 180°.

1 . Elevator, preferably machineroomless elevator, wherein the thickness of hoisting ropes is below 8 mm and/or the diameter of the traction sheave is smaller than 320 mm and wherein the overall contact between the traction sheave and a hoisting rope exceed a contact angle of 180°.  
   
   
       2 . Elevator according to  claim 1 , wherein a hoisting machine engages a set of hoisting ropes by means of a traction sheave, said set of hoisting ropes comprising hoisting ropes of substantially circular cross-section, and in which elevator the set of hoisting ropes supports a counterweight and an elevator car moving on their respective tracks, and that the substantially round hoisting rope has a thickness below 8 mm and/or the diameter of the traction sheave is smaller than 320 mm and that the contact angle between the hoisting rope or hoisting ropes and the traction sheave is larger than 180°.  
   
   
       3 . Elevator according to  claim 1 , wherein between the traction sheave and the hoisting ropes there is a continues contact angle of at least 180°.  
   
   
       4 . Elevator according to  claim 1 , wherein the contact angle on the traction sheave consists of 2 or more parts.  
   
   
       5 . Elevator according to  claim 1 , wherein the roping of the traction sheave is implemented using ESW roping.  
   
   
       6 . Elevator according to  claim 1 , wherein the roping of the traction sheave is implemented using DW roping.  
   
   
       7 . Elevator according to  claim 1 , wherein the roping of the traction sheave is implemented using XW roping.  
   
   
       8 . Elevator according to  claim 1 , wherein the elevator car and/or the counterweight are suspended with a suspension ratio of 2:1.  
   
   
       9 . Elevator according to  claim 1 , wherein the elevator car and/or the counterweight are suspended with a suspension ratio of 1:1.  
   
   
       10 . Elevator according to  claim 1 , wherein the elevator car and/or the counterweight are suspended with a suspension ratio of 3:1.  
   
   
       11 . Elevator according to  claim 1 , wherein the elevator car and/or the counterweight are suspended with a suspension ratio of 4:1 or even with a higher suspension ratio.  
   
   
       12 . Elevator according to  claim 1 , wherein the counterweight is suspended n:1 and the car is suspended m:1 and m is an integer at least 1 and n is an integer greater than m.  
   
   
       13 . Elevator according to  claim 1 , wherein the average of the wire thicknesses of the steel wires of the hoisting ropes is about 0.5 mm, and that the strength of the steel wires is greater than 2000 N/mm Z .  
   
   
       14 . Elevator according to  claim 1 , wherein the average of the wire thicknesses of the steel wires of the hoisting ropes is greater than about 0.1 mm and less than about 0.4 mm.  
   
   
       15 . Elevator according to  claim 1 , wherein the average of the wire thicknesses of the steel wires of the hoisting ropes is greater than about 0.15 mm and less than about 0.3 mm.  
   
   
       16 . Elevator according to  claim 1 , wherein it is also implemented according to at least two of the other preceding claims.  
   
   
       17 . Elevator according to  claim 1 , wherein the strength of the steel wires of the hoisting ropes is greater than about 2300 N/mm 2  and less than about 2700 N/mm  Z .  
   
   
       18 . Elevator according to  claim 1 , wherein the weight of the hoisting machine of the elevator is at most about ⅕ of the weight of the nominal load of the elevator.  
   
   
       19 . Elevator according to any one of the preceding claims, wherein the outer diameter of the traction sheave driven by the hoisting machine of the elevator is at most about 250 mm.  
   
   
       20 . Elevator according to  claim 1 , wherein the weight of the hoisting machine of the elevator is at most about 100 kg.  
   
   
       21 . Elevator according to  claim 1 , wherein the hoisting machine is of gearless type.  
   
   
       22 . Elevator according to  claim 1 , wherein the hoisting machine is of geared type.  
   
   
       23 . Elevator according to  claim 1 , wherein the rope of the overspeed governor is thicker in diameter than the hoisting ropes.  
   
   
       24 . Elevator according to  claim 1 , wherein the overspeed governor rope is of the same thicknesses in diameter as the hoisting ropes.  
   
   
       25 . Elevator according to  claim 1 , wherein the weight of the elevator machine is at most about ⅙ of the nominal load, preferably at most about ⅛ of the nominal load, very preferably less than about {fraction (1/10)} of the nominal load.  
   
   
       26 . Elevator according to  claim 1 , wherein 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.  
   
   
       27 . Elevator according to  claim 1 , wherein the diameter of the pulleys supporting the car is equal to or less than the height dimension of a horizontal beam comprised in the structure supporting the car.  
   
   
       28 . Elevator as defined in  claim 1 , wherein the pulleys are placed at least partially inside the beam.  
   
   
       29 . Elevator as defined in  claim 1 , wherein the track of the elevator car is in an elevator shaft.  
   
   
       30 . Elevator as defined in  claim 1 , wherein 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 substantially non-fluid nature.  
   
   
       31 . Elevator as defined in  claim 1 , wherein the hoisting ropes have a surface part made of rubber, urethane or some other non-metallic material.  
   
   
       32 . Elevator according to  claim 1 , wherein the hoisting ropes are uncoated.  
   
   
       33 . Elevator as defined in  claim 1 , wherein the traction sheave and/or rope pulleys are/is coated at least in their/its rope grooves with a non-metallic material.  
   
   
       34 . Elevator as defined in  claim 1 , wherein the traction sheave and/or rope pulleys are/is made of a non-metallic material at least in the rim part comprising the rope grooves.  
   
   
       35 . Elevator as defined in  claim 1 , wherein the traction sheave is uncoated.  
   
   
       36 . Elevator according to  claim 1 , wherein the both the counter weight and the elevator car are suspended using a diverting pulley.  
   
   
       37 . Elevator according to  claim 1 , wherein the hoisting ropes are passed under, over or sideways past the elevator car by means of diverting pulleys mounted on the elevator car.  
   
   
       38 . Elevator according to  claim 1 , wherein at least the traction sheave and/or the rope pulleys form together with the hoisting ropes a material pair that allows the hoisting rope to bite into the traction sheave and/or into the rope pulley after the coating on the traction sheave has worn out.  
   
   
       39 . Elevator according to  claim 1 , wherein the elevator comprises a mounting base on which the hoisting machine with the traction sheave and at least one diverting pulley are mounted, and that the mounting base determines the relative positions of and distance between the diverting pulley and the traction sheave.  
   
   
       40 . Elevator according to  claim 1 , wherein at least the elevator hoisting machine, traction sheave, diverting pulley and mounting base have been fitted as a ready-made unit.