METHOD FOR MODERNIZING ELEVATOR SYSTEM

Abstract The invention relates to a method for modernizing an elevator system, which elevator system comprises a first elevator (1) comprising a first car (2) in a first hoistway (3), a second elevator (4), comprising a second car (5) in a second hoistway (6), the method comprising using the first and second car (2,5) for transporting passengers and/or goods between vertically displaced floors of a building (7), and thereafter removing the first elevator car from use for transporting passengers and/or goods between vertically displaced floors, and thereafter installing a construction time elevator (8) into the lower end of the first hoistway (3), the traveling zone (Z3) of the car (9) of the construction time elevator (8) covering only partially the height of the first hoistway (3); and thereafter using the car (9) of the construction time elevator (8) and the second car (5) simultaneously for transporting passengers and/or goods between vertically displaced floors of the building (7), during which using the method comprises performing construction work in the first hoistway (3) above the traveling zone (Z3) of the car (9) of the construction time elevator (8); and thereafter changing the traveling zone (Z3) of the car (9) of the construction time elevator (8) to extend higher (Z5) in the hoistway (3), and thereafter using the car (9) of the construction time elevator (8) and the second car (5) simultaneously for transporting passengers and/or goods between vertically displaced floors, during which using the method comprises performing construction work in the first hoistway (3) above the traveling zone (Z5) of the car (9) of the construction time elevator. Fig. 1 7-3 F - 6 12a F 18a 18b' 9