Method for retrofitting a building using a lift system and component kit for performing the method

Abstract

A method for retrofitting a building using a lift system and a component kit for performing the method are provided. The shaft of the lift system extends over at least two stories 3 and comprises a self-supporting sheet metal box made of at least one steel plate, which is provided for receiving a cabin of the lift system together with its guides and drive devices. The sheet metal box of the shaft has a profiled cross section, which forms a cross-sectional area in the cross-sectional plane within the sheet metal box, which essentially covers the area required by the cabin and its guides and drive devices, and additionally contains the area of a lift platform for bridging a distance between the cabin and the building. The method provides prefabricating the lift system and installing it to the building.

1 . A method for retrofitting a building with a lift system, the building containing a plurality of stories ( 3 ) which are subdivided and have story doors ( 4 ) which are accessible via a common staircase ( 5 ), the staircase ( 5 ) being adjacent to a front side ( 1 ) of the building and, for each story ( 3 ), having a main landing ( 7 ) for the story doors ( 4 ) and an intermediate landing ( 8 ) for a double-flight of stairs ( 9 ),
 the method comprising:
 prefabricating the lift system ( 26 ) having a shaft ( 27 ), having a cabin ( 36 ) which is movable in a longitudinal direction of the shaft ( 27 ), with guides and drive elements, and a lift platform ( 35 ) for bridging a distance between the cabin ( 36 ) and the building for each story ( 3 ), the shaft ( 27 ) extending over at least two stories ( 3 ) and comprising a self-supporting sheet metal box made of at least one steel plate, which is provided for receiving the cabin ( 36 ) together with the guides and the drive elements, said sheet metal box extends in a straight line in the longitudinal direction of the shaft ( 27 ) while being profiled in a cross-sectional plane orthogonal to the longitudinal direction of the shaft ( 27 ), and the sheet metal box of the shaft ( 27 ) having a cross section which forms a cross-sectional area in the cross-sectional plane within the sheet metal box, the cross-sectional area containing an area required by the cabin ( 36 ) and the guides and the drive elements and additionally an area of the lift platform ( 35 ), 
 fabricating a foundation ( 14 ) for the lift system ( 26 ) in front of the front side ( 1 ) of the building, 
 opening the front side ( 1 ) of the building in a width direction of the staircase ( 5 ), 
 removing the intermediate landings ( 8 ) and the double-flight of stairs ( 9 ), 
 installing walkways ( 24 ) at a height of the main landings ( 7 ), which extend horizontally from the main landings ( 7 ) to the front side ( 1 ) of the building and thereby only partially cover the cross section of the staircase ( 5 ) to provide clear space for a flight of stairs, 
 installing a single-flight of stairs ( 22 ) which connects the individual walkways ( 24 ) to one another and forms a modified staircase therewith, 
 setting up the lift system ( 26 ) on the foundation ( 14 ), 
 aligning the lift system ( 26 ) on the foundation ( 14 ) and joining the lift system ( 26 ) to the front side ( 1 ) of the building, 
 establishing a connection between the lift platforms ( 35 ) and the walkways ( 24 ) on each story ( 3 ), and 
 establishing access to the lift platform ( 35 ) of the ground floor from outside the building. 
   
     
     
         2 . The method as claimed in  claim 1 ,
 wherein the installation of the walkways ( 24 ) and the installation of the single-flight of stairs ( 22 ) is carried out by installing a preassembled staircase module ( 19 ) which contains at least the walkways ( 24 ) and stair sections ( 23 ) which connect the walkways ( 24 ) over one flight, and a holding structure ( 25 ) to which the walkways ( 24 ) and the stair sections ( 23 ) are fastened.   
     
     
         3 . The method as claimed in  claim 2 ,
 wherein the holding structure ( 25 ) is formed of a number of interconnected profiles or tubes, running in a stairwell or between the walkways ( 24 ) and the stair sections ( 23 ) and connecting all of the walkways ( 24 ) to one another.   
     
     
         4 . The method as claimed in  claim 3 , further comprising
 before the installation of the staircase module ( 19 ), installing a basement staircase module ( 16 ) having a single-flight stair section ( 23 ) and supports ( 17 ) for the staircase module ( 19 ).   
     
     
         5 . The method as claimed in  claim 4 , further comprising
 before the installation of the staircase module ( 19 ), attaching auxiliary rails ( 18 ) for sliding the staircase module ( 19 ) into the building, and sliding the staircase module ( 19 ) in using the auxiliary rails ( 18 ) through the open front side ( 1 ) of the building.   
     
     
         6 . The method as claimed in  claim 1 , further comprising
 sealing contact points between the lift system ( 26 ) and the front side ( 1 ) of the building using at least one of assembly foam or an elastomeric sealing element.   
     
     
         7 . The method as claimed in  claim 1 ,
 wherein the foundation is fabricated as a foundation plate ( 14 ) from a one-part or multi-part precast concrete part ( 13 ).   
     
     
         8 . The method as claimed in  claim 1 ,
 further comprising using straight stair sections ( 23 ) having at least one of a quarter-turn entrance or exit or having a quarter platform at at least one of the entrance or exit for the single-flight of stairs ( 22 ).   
     
     
         9 . The method as claimed in  claim 1 ,
 further comprising using the shaft ( 27 ) for the lift system ( 26 ) to establish access to the lift platform ( 35 ) of the ground floor from outside the building, the sheet metal box of which, in a position in which the lift platform ( 35 ) for the ground floor of the building is located after the lift system ( 26 ) has been attached to the building on a side that is not a building side of the shaft ( 27 ), is provided with a passage opening for a front door ( 29 ), and attaching an outer staircase ( 32 ) to the shaft ( 27 ) which connects the passage opening of the shaft ( 27 ) to the ground level ( 2 ).   
     
     
         10 . The method as claimed in  claim 1 ,
 further comprising, before the installation of the walkways ( 24 ), in each case using a crossbeam, which is fastened on both sides of the staircase ( 5 ) to the outer walls of the front side ( 1 ) of the building, and placing the respective walkway ( 24 ) on the crossbeam.   
     
     
         11 . A component kit for performing the method as claimed in  claim 1 , comprising:
 the shaft ( 27 ) for the lift system and the preassembled staircase module ( 19 ), the staircase module ( 19 ) including a walkway ( 24 ) for each story ( 3 ) and the stair sections ( 23 ) which connect the walkways ( 24 ) over a single flight, and a holding structure ( 25 ) to which the walkways ( 24 ) and the stair sections ( 23 ) are fastened, and the shaft ( 27 ) extending over at least two of the stories ( 3 ) and comprising the self-supporting sheet metal box made of the at least one steel plate for receiving the cabin ( 36 ) together with the guides and drive elements, the sheet metal box extending in a straight line in the longitudinal direction of the shaft ( 27 ), and being profiled in the cross-sectional plane orthogonal to the longitudinal direction of the shaft ( 27 ), and the sheet metal box of the shaft ( 27 ) having the cross section forming the cross-sectional area within the sheet metal box in the cross section plane, the cross-sectional area containing the area required by the cabin ( 36 ) and the guides and drive elements and additionally the area of the lift platform ( 35 ).   
     
     
         12 . The component kit as claimed in  claim 11 ,
 wherein the holding structure ( 25 ) includes a number of interconnected profiles or tubes which extend in the stairwell or between the walkways ( 24 ) and the stair sections ( 23 ) and connecting all of the walkways ( 24 ) to one another.   
     
     
         13 . The component kit as claimed in  claim 11 ,
 wherein the stair sections ( 23 ) include at least one of quarter-turn entrance or exits or having a quarter platform at at least one of the entrance or exit.   
     
     
         14 . The component kit as claimed in  claim 11 ,
 further comprising a foundation plate ( 14 ) made of a one-part or multi-part precast concrete part ( 13 ).   
     
     
         15 . The component kit as claimed in  claim 11 ,
 further comprising a basement staircase module ( 16 ) having a single-flight stair section ( 23 ) and supports ( 17 ) for the staircase module ( 19 ).   
     
     
         16 . The component kit as claimed in  claim 11 ,
 wherein the shaft ( 27 ) comprises the sheet metal box and the lift platform ( 35 ) for each said story ( 3 ).   
     
     
         17 . The component kit as claimed in  claim 11 ,
 wherein the lift platforms ( 35 ) are provided with anchoring devices for anchoring to elements of the staircase ( 5 ) of the building.   
     
     
         18 . The component kit as claimed in  claim 11 ,
 wherein the sheet metal box is open on a building side of the shaft ( 27 ).   
     
     
         19 . The component kit as claimed in  claim 11 ,
 wherein the sheet metal box is provided with light openings ( 28 ) in a wall adjacent to the lift platforms ( 35 ).