Elevator and elevator refurbishing method

摘要

A car and a counterweight are suspended by a main rope that is wound onto a driving sheave, a car suspending sheave, and a counterweight suspending sheave. A first main rope portion between the driving sheave and the car suspending sheave and a second main rope portion between the car suspending sheave and the car-side rope fastener portion are passed through a common car-side penetrating aperture so as to cross each other when viewed in an axial direction of the driving sheave. A third main rope portion between the driving sheave and the counterweight suspending sheave and a fourth main rope portion the counterweight suspending sheave and the counterweight-side rope fastener portion are passed through a common counterweight-side penetrating aperture that is disposed on the machine room floor so as to cross each other when viewed in the axial direction of the driving sheave.

主权项

1. An elevator comprising:
a car that can be vertically raised and lowered inside a hoistway; a car suspending sheave that is disposed on an upper portion of the car between a top surface of the car and a top surface of the hoistway: a counterweight that can be raised and lowered inside the hoistway; a counterweight suspending sheave that is disposed on an upper portion of the counterweight between a top surface of the counterweight and a top surface of the hoistway: a driving apparatus that includes a driving sheave, that is disposed inside a machine room that is positioned above the hoistway, and that generates a driving force that raises and lowers the car and the counterweight; and a main rope that is connected to each of a car-side rope fastener portion and a counterweight-side rope fastener portion that are disposed inside the machine room, and that suspends the car and the counterweight by being wound onto the driving sheave, the car suspending sheave, and the counterweight suspending sheave, wherein: a portion of the main rope that is directed from the driving sheave to the car-side rope fastener portion is wound onto the car suspending sheave at a first side of the car suspending sheave, a distance from the side of the car suspending sheave to a vertical line that passes through a shaft axis of the driving sheave is horizontally greater than a distance from a vertical line that passes through a shaft axis of the car suspending sheave to the vertical line passing through axis of the driving sheave; a portion of the main rope that is directed from the driving sheave to the counterweight-side rope fastener portion is wound onto the counterweight suspending sheave at a first side of the counterweight suspending sheave, a distance from the side of the counterweight suspending sheave to the vertical line passing through the shaft axis of the driving sheave is horizontally greater than a distance from a vertical line that passes through a shaft axis of the counterweight suspending sheave to the vertical line passing through axis of the driving sheave, wherein the horizontal distance is substantially perpendicular to a vertical motion of the car; the main rope includes: a first main rope portion that is positioned between the driving sheave and the car suspending sheave; a second main rope portion that is positioned between the car suspending sheave and the car-side rope fastener portion; a third main rope portion that is positioned between the driving sheave and the counterweight suspending sheave; and a fourth main rope portion that is positioned between the counterweight suspending sheave and the counterweight-side rope fastener portion; the first main rope portion and the second main rope portion are passed through a common car-side penetrating aperture that is disposed on a machine room floor that forms a partition between the hoistway and the machine room, the first main rope extending from the driving sheave to the first side of the car suspending sheave and extending across the vertical line passing through the car suspending sheave axis, the second main rope extending from a second side of the car suspending sheave opposite the first side, to the car-side rope fastener portion and extending across the vertical line passing through the car suspending sheave axis, wherein a point of contact between the first main rope and the driving sheave is positioned on a first side of the vertical line extending through the car suspending sheave axis, and an end of the second rope attached to the car-side rope fastener portion is positioned on a second side of the vertical line extending through the car suspending sheave axis which is opposite the first side so that the first main rope and the second main rope cross each other when viewed in a direction perpendicular to the vertical motion of the car; and the third main rope portion and the fourth main rope portion are passed through a common counterweight-side penetrating aperture that is disposed on the machine room floor, the third main rope extending from the driving sheave to the first side of the counterweight suspending sheave and extending across the vertical line passing through the counterweight suspending sheave axis, the fourth main rope extending from a second side of the counterweight suspending sheave opposite the first side, to the counterweight-side rope fastener portion and extending across the vertical line passing through the counterweight suspending sheave axis, wherein a point of contact between the third main rope and the driving sheave is positioned on a first side of the vertical line extending through the counterweight suspending sheave axis, and an end of the fourth rope attached to the counterweight-side rope fastener portion is positioned on a second side of the vertical extending through the counterweight suspending sheave axis which is opposite the first side so that the third main rope and the fourth main rope cross each other when viewed in a direction perpendicular to the vertical motion of the car.