The present invention provides a pull rope head fixing apparatus and an elevator system using the same, and belongs to the technical field of elevators. The pull rope head fixing apparatus of the present invention is configured to simultaneously fix rope heads of N pull ropes that are arranged in parallel, and includes: a hydraulic cylinder body configured to form a hydraulic cylinder; N first hydraulic sub-cylinders arranged in parallel on the hydraulic cylinder body and communicated with the hydraulic cylinder; and first pistons each disposed corresponding to each of the first hydraulic sub-cylinders. The pull rope head fixing apparatus of the present invention can automatically balance the tensions of multiple pull ropes fixed by it.

A method for releasing safety gears of an elevator car or a counterweight of an elevator system, the elevator system including a stalling detector coupled to compensation roping associated with the elevator car or the counterweight and configured to detect an increased rope tension, includes preventing a stalling indication from the stalling detector during a rescue operation; and moving the elevator car in order to release the safety gears.

A device for cage jamming buffer of large-tonnage hoisting system of ultra-deep shaft is provided. End cage jamming buffer mechanisms are added at both ends of an automatic wire rope tension balancing mechanism, wherein the end cage jamming buffer mechanisms include an end buffer module and an end fixing module, and the end buffer module and the end fixing module are respectively mounted on shafts of the automatic wire rope tension balancing mechanisms at two ends. The end buffer module mainly consists of a buffer bearing pedestal, a limit block, a buffer block, and a stop block sequentially mounted on the shaft of the automatic wire rope tension balancing mechanism at one end. The end fixing module mainly consists of a fixing bearing pedestal and a fixing block mounted on the shaft, wherein the fixing bearing pedestal is connected to a transmission gear by an adjusting bolt.

A vibration damping device for reducing vibration of an elevator rope includes a displacement amplifier arranged around a region from a first portion of the elevator rope drawn and a second portion of the elevator rope drawn from an opposite side of one or more sheaves in parallel with the first portion. The displacement amplifier is configured to amplify a displacement of each of the first portion and the second portion of the elevator rope. The device also includes a limiting member that controls displacement amplification performed by the displacement amplifier such that the displacement of the first portion or the second portion amplified by the displacement amplifier does not become greater than a first displacement, which is a displacement of the elevator rope by which the elevator rope is not allowed to return to an equilibrium position of the vibration.

A protective cover for a load bearing member of an elevator system includes a sleeve wrapped around a perimeter of the load bearing member, the sleeve configured to protect the load bearing member from debris damage during installation or maintenance operation of the elevator system, and configured to slide along a length direction of the load bearing member. A tether is configured to connect the sleeve to a working platform.

A protective cover for a load bearing member of an elevator system includes a sleeve wrapped around a perimeter of the load bearing member, the sleeve configured to protect the load bearing member from debris damage during installation or maintenance operation of the elevator system, and configured to slide along a length direction of the load bearing member. A tether is configured to connect the sleeve to a working platform.

An object of the invention is to provide a vibration damping system that can avoid the occurrence of resonance of an elevator rope regardless of the vibration frequency of a vibration source. A vibration damping system (200) includes a displacement amplifier (7), a calculation unit (66), and a displacement amplification control unit (67). The displacement amplifier (7) is arranged along a given position in the longitudinal direction of the elevator rope. The displacement amplifier (7) amplifies a displacement due to vibration of the elevator rope based on a variable amplification factor. The calculation unit (66) calculates the natural frequency of the elevator rope. The displacement amplification control unit (67) controls the displacement amplification of the displacement amplifier (7) based on the natural frequency calculated by the calculation unit (66) and a preset vibration frequency.

An object of the present invention is to provide a vibration damping device including an instability preventing means, for efficiently suppressing amplification of vibration of a long structure, which is mechanically flexible, due to a resonance phenomenon. A vibration damping device (100) for reducing vibration of a long structure (1) includes a displacement amplifier (7) and limiting members (8). The displacement amplifier (7) is arranged along a given position in the longitudinal direction of the structure (1). The displacement amplifier (7) amplifies a displacement of the structure (1). The limiting members (8) control displacement amplification performed by the displacement amplifier (7) such that the displacement of the structure (1) amplified by the displacement amplifier (7) does not become greater than a first displacement, the first displacement being a displacement of the structure (1) by which the structure (1) is not allowed to return to the equilibrium position of the vibration.

A method for roping an elevator. At the bottom part of the elevator shaft the hoisting ropes are routed under the pulleys of the elevator car. Then the elevator car and the counterweight are hoisted to the upper part of the shaft where the first ends of the hoisting ropes are routed through the traction sheave and the counterweight pulleys. After that the first rope ends are fixed to the counterweight side rope terminals and the counterweight is lowered to the bottom part of the shaft. During the descent the hoisting ropes are unwound from the reels through the whole roping system with the help of the mass of the counterweight. Finally, the second ends of the hoisting ropes are fixed to the car side rope terminal and tightened to the correct tension.

A method for roping an elevator. At the bottom part of the elevator shaft the hoisting ropes are routed under the pulleys of the elevator car. Then the elevator car and the counterweight are hoisted to the upper part of the shaft where the first ends of the hoisting ropes are routed through the traction sheave and the counterweight pulleys. After that the first rope ends are fixed to the counterweight side rope terminals and the counterweight is lowered to the bottom part of the shaft. During the descent the hoisting ropes are unwound from the reels through the whole roping system with the help of the mass of the counterweight. Finally, the second ends of the hoisting ropes are fixed to the car side rope terminal and tightened to the correct tension.