Elevator arrangement and method for constructing elevator
A method for constructing an elevator includes providing a hoisting machine unit, a guide rail line, an elevator car, a counterweight, and a hoisting roping; using the elevator car for transporting passengers and/or goods while the hoisting machine unit is in a first position; installing one or more guide rail sections into the guide rail line above a guide rail section of the hoisting machine unit; removing the hoisting machine unit from the first position; installing a guide rail section into the guide rail line in place from where the guide rail section of the hoisting machine unit was removed; hoisting the hoisting machine unit; mounting the hoisting machine unit to a second position which is higher than the first position; and using the elevator car for transporting passengers and/or goods while the hoisting machine unit is in the second position. An elevator arrangement is described for implementing the method.
1. A method for constructing an elevator comprising the steps of:
providing a hoisting machine unit, the hoisting machine unit comprising a hoisting machine, and a guide rail section, on which the hoisting machine is fixed;
providing one or more guide rail lines in a hoistway for guiding an elevator car and/or a counterweight, said one or more guide rail lines comprising a guide rail line comprising a plurality of guide rail sections, said providing comprising positioning the hoisting machine unit in a first position such that the guide rail section of the hoisting machine unit is one of said plurality of guide sections, and the guide rail line comprises one or more guide rail sections below the guide rail section of the hoisting machine unit;
providing the elevator car and the counterweight in the hoistway;
providing a hoisting roping interconnecting the elevator car and the counterweight;
using the elevator car a first time for transporting passengers and/or goods while the hoisting machine unit is in said first position;
installing one or more guide rail sections into the guide rail line above the guide rail section of the hoisting machine unit;
removing the hoisting machine unit from said first position after a period of said using;
installing a guide rail section into the guide rail line in place from where the guide rail section of the hoisting machine unit was removed in said removing;
hoisting the hoisting machine unit;
mounting the hoisting machine unit to a second position higher than the first position, wherein said mounting comprises placing the guide rail section of the hoisting machine unit on top of the guide rail line; and
using the elevator car a second time for transporting passengers and/or goods while the hoisting machine unit is in said second position.
2. The method according to claim 1 , further comprising providing a hoisting arrangement actuatable to hoist and/or to lower the guide rail section immediately above the guide rail section of the hoisting machine unit.
3. The method according to claim 2 , wherein the hoisting and/or lowering of the guide rail section is performed with one or more actuatable hoisting devices of the hoisting arrangement.
4. The method according to claim 3 , wherein the one or more actuatable hoisting devices are supported by the guide rail section immediately below the guide rail section of the hoisting machine unit.
5. The method according to claim 3 , wherein the one or more actuatable hoisting devices are actuatable to hoist and/or lower the guide rail section immediately above the guide rail section of the hoisting machine unit via a bracket fixed on the guide rail section immediately above the guide rail section of the hoisting machine unit.
6. The method according to claim 2 , further comprising hoisting the guide rail section immediately above the guide rail section of the hoisting machine unit before removing the hoisting machine unit from said first position.
7. The method according to claim 1 , further comprising hoisting the guide rail section immediately above the guide rail section of the hoisting machine unit before removing the hoisting machine unit from said first position.
8. The method according to claim 7 , wherein in said hoisting the guide rail section, the guide rail section immediately above the guide rail section of the hoisting machine unit is hoisted such that the guide rail section immediately above the guide rail section is raised from being vertically supported by the guide rail section of the hoisting machine unit and/or such that a gap is formed or enlarged between the guide rail section of the hoisting machine unit and the guide rail section immediately above the guide rail section of the hoisting machine unit.
9. The method according to claim 1 , further comprising between said removing the hoisting machine unit from said first position and installing a guide rail section, supporting vertically the guide rail section which was previously immediately above the guide rail section of the hoisting machine unit with a hoisting arrangement.
10. The method according to claim 1 , wherein after installing a guide rail section into the guide rail line in place from where the guide rail section of the hoisting machine unit was removed in said removing, the method further comprises lowering the guide rail section which was previously immediately above the guide rail section of the hoisting machine unit towards the guide rail section installed.
11. The method according to claim 1 , wherein hoisting the hoisting machine unit is performed with a working platform vertically movable in the hoistway above the car.
12. The method according to claim 1 , wherein one or more guide rail sections of the guide rail line are supported laterally immovably in the hoistway with one or more brackets.