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.

Claims

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).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0043] An embodiment of a lift system designed according to the invention and an embodiment for performing a method according to the invention are described and explained in more detail with reference to the accompanying drawings. Shown are:

[0044] FIGS. 1 to 20 different phases in the performance of an embodiment for a method according to the invention, in a schematic representation;

[0045] FIG. 21 a lateral cross section through a staircase of a building from FIGS. 1 to 20, using a retrofitted lift system;

[0046] FIGS. 22A-22C three sections with views of the staircase from FIG. 21 from above, namely through the basement, through the ground floor and through an upper story;

[0047] FIG. 23 a cross section through the lower half of the staircase, according to another embodiment;

[0048] FIG. 24 a part of a lateral cross section as in FIG. 21, but according to another embodiment; and

[0049] FIG. 25 a section having a view from above as in FIG. 22C, but according to the embodiment from FIG. 24.

DETAILED DESCRIPTION

[0050] The method shown schematically illustrated in FIGS. 1 to 20 in selected method steps and designed according to the invention is an example of the retrofitting according to the invention of a used residential building using a lift system according to the invention, which can be carried out on site within three working days.

[0051] FIG. 1 shows schematically a front side 1 of a four-story building, the ground floor of which is half a story height above ground level 2. A total of eight flats are accommodated in the four stories 3 above ground level 2, which flats are accessible via story doors 4. These make the flats accessible via a central staircase 5, which is adjacent to the front side 1 of the building and can be entered from the outside via a front entrance 6.

[0052] FIG. 2 shows the staircase 5 in greater detail. It is thus clear that the staircase 5 contains, in addition to eight story doors 4 for each story, a main landing 7, which is associated with the story doors 4, and an intermediate landing 8 for two flights of stairs 9. It is also clear here that the front entrance 6, which is located on ground level 2, leads to an intermediate landing for the double-flight of stairs 9, so that access to the ground floor can only be reached via a stair section of the double-flight of stairs.

[0053] FIG. 3 symbolizes the pick-up of residents who move to a hotel for the three-day construction work.

[0054] FIG. 4 shows that the construction work begins with an excavation 10 for a shallow foundation of the lift system (not yet illustrated here) and in parallel with a cut 11 for opening the front side 1 of the building in the width of the staircase 5.

[0055] In order to protect any supply lines of the building for fresh water, waste water, electricity and/or data traffic against excessive loads, as shown in FIG. 5, a specific cover 12 can be attached in the excavation 10. The excavation 10 is typically 0.8 m to 1.0 m deep, so that the supply lines can remain in place.

[0056] FIG. 6 symbolizes the delivery and insertion of a first precast concrete part 13 as part of a foundation plate 14 into the excavation 10, while the opening of the front side 1 of the building proceeds.

[0057] In FIG. 7, a second precast concrete part 13 has been delivered and inserted into the excavation 10, so that the foundation plate 14 has already been completed.

[0058] As FIG. 8 shows, the foundation plate 14 is then protected by placing a foundation cover 15 for the further construction work.

[0059] FIG. 9 illustrates schematically that after opening the front side 1 of the building, the double-flight of stairs 9 and the intermediate landings 8 are removed from the staircase 5. The main landings 7, however, remain in place.

[0060] As FIG. 10 shows, a basement staircase module 16 is then introduced into the staircase 5 and placed on the floor of the basement. This basement staircase module 16 essentially consists of a stair section 23 and a support 17 for setting up a staircase module (not yet illustrated here).

[0061] FIG. 11 illustrates how three auxiliary rails 18 are introduced into the staircase 5 on ground level 2, namely one auxiliary rail 18 each on the side walls of the staircase 5 and a third auxiliary rail 18 on the support 17 of the basement staircase module 16. The auxiliary rails 18 run over the foundation cover 15 here.

[0062] As shown in FIGS. 12, 13 and 14, a staircase module 19, which was prefabricated in the factory and can be delivered using a lorry 20 due to a corresponding inherent stability, is then lifted from the lorry 20 by a crane lorry 21, placed on the auxiliary rails 18 and slid into the staircase 5 along the auxiliary rails 18. The staircase module 19 here consists of a single-flight of stairs 22 having individual stair sections 23, each of which has a quarter-turn entrance and exit, in order to connect a walkway 24 for each story to the walkway 24 located below or above it. In particular, FIG. 15 illustrates here that the quarter-turn stair sections 23 continue to maintain the main landings 7 with regard to desirable barrier-free accessibility as maneuvering areas; the same applies to the lift platforms 35 (not shown here) (see FIGS. 21 to 23).

[0063] The staircase module 19 obtains the necessary inherent stability through a holding structure 25 which is arranged in the stairwell and comprises a plurality of vertically running steel tubes which connect the individual walkways 24, 24 to one another and finally transfer the load onto the support 17 of the basement staircase module 16.

[0064] After making connections between the walkways 24 and the main landings 7, and optionally after additional securing of the walkways 24 and/or the stair sections 23 on the side walls of the staircase 5, the foundation cover 15 is removed again and the auxiliary rails are scaled back by cutting to length. FIG. 15 shows this state.

[0065] The construction site is thus prepared for the delivery of a lift system 26 designed according to the invention, which in turn is delivered using a lorry 20 and is lifted and set up by a crane lorry 21, as shown in FIGS. 16 and 17. The lift system 26 here consists of a prefabricated shaft 27 designed according to the invention, in which a (not visible here) cabin is installed together with its guides and drive devices and other devices necessary for operation. The shaft 27 also comprises lift platforms (not visible here) for each story and a number of light openings 28 with windows, a front door 29 and a ground-level passage opening 30 positioned on ground level 2 for operating the cabin guided in the shaft 27.

[0066] As FIG. 17 shows, the lift system 26 is set up on the foundation plate 14 and then aligned and fixed. At the same time, the contact surfaces between the shaft 27 and the front side 1 of the building are sealed with fire protection foam. As can be seen from FIG. 17, the shaft 27 covers the entire width of the staircase 5, so that the front side 1 of the building is closed again after the lift system 26 has been set up.

[0067] In order to create an escape route or access to the staircase 5 and to the individual story doors 4 bypassing the lift, the front door 29, which is now located at the level of the ground floor, since it leads to the ground floor lift platform, from where the ground floor walkway 24 and the ground floor main landing 7 can be reached, is equipped with an outer platform 31 and an outer staircase 32.

[0068] After removal of the lift system 26 and attachment of handrails 33 and a canopy 34, as shown in FIG. 19, the retrofitting of the building with the lift system 26 is completed and, as shown in FIG. 20, the residents can move into their flats again.

[0069] FIG. 21 illustrates the result of an embodiment of a method according to the invention in a lateral sectional illustration through the staircase 5. The associated FIGS. 22A-22C show sectional views from above through the basement (FIG. 22A), through the ground floor (FIG. 22B) and through one of the upper stories (FIG. 22C), which in particular illustrates the construction according to the invention of the lift system 26 or the prefabricated shaft 27.

[0070] As FIG. 21 shows, the staircase 5 consists of four above-ground stories, a ground floor and three upper stories, and a basement. The story doors 4 each open onto a main landing 7 which has remained in its original state. The front side 1 of the building has been opened, and the main landings 7 have been connected at the same level to lift platforms 35 by means of inserted walkways 24 fastened to the staircase side walls, which were joined together with the prefabricated shaft 27 to the front side 1 of the building. The shaft 27 stands here on a foundation plate 14, which was previously inserted in front of the front side 1 of the building in a corresponding excavation 10.

[0071] At ground level 2, an outwardly oriented passage opening 30 can be reached in the shaft 27, through which a cabin (not illustrated here) that is movable within the shaft 27 in the longitudinal direction is accessible. Alternatively, access to the staircase 5 via the outer staircase 32 and the front door 29 to the ground floor lift platform 35 is ensured, from where the single-flight of stairs 22 with the walkways 24 can be reached without having to use the lift system 26.

[0072] As FIG. 21 illustrates, each level of each main landing 7 or each story door 4 can be reached directly via the lift system 26, and each story door 4 can be reached by the lift system 26 at the same level via the lift platform 35, the walkway 24 and the main landing 7 without any barriers.

[0073] The stair sections 23 having quarter-turn entrance and exit prevent the main landings 7 and the lift platforms 35 from having to be part of the single-flight of stairs 22. Rather, they can be used as mere traffic and maneuvering areas in the sense of complete accessibility. Appropriate handrails ensure the necessary traffic safety.

[0074] The central function of the lift platform 35 is illustrated using FIG. 22, in particular FIG. 22B. This is the only way to ensure an escape route or access to the staircase 5 without having to use the lift system 26. Due to the fact that since the ground floor, which is half a story above ground level 2, can only be reached at the same level from the front side 1 of the building via a walkway 24, an outer staircase 32 must be provided, via which one can get from ground level 2 to walkway 24. If the cabin 36 of the lift system 26 were not spaced apart from the front side 1 of the building, as is the case here, but rather opened directly towards the walkway 24, it would not be possible to access the walkway 24 via the outer staircase 32. At the same time, the lift platform 35 increases the area of the staircase 5 since the shaft 27 with its lift platform 35 covers the entire width of the staircase 5 and thereby closes the front side 1 of the building again.

[0075] FIG. 22A moreover again illustrates that the foundation plate 24 is composed of two precast concrete parts 13, which are indirectly connected to one another by fastening each precast concrete part 13, 13 to the lift system 26. The stair section 36, which leads from the basement to the ground floor, has a quarter-turn entrance, but a straight exit, since it is part of the basement staircase module 16, which ultimately forms a support 17 for the staircase module 19.

[0076] The design of the modified staircase having a single-flight of stairs 22, which, as in the embodiment according to FIGS. 1 to 20, is formed by a prefabricated staircase module 19 and a basement staircase module 16, is illustrated again in more detail in a partial sectional lateral view in FIG. 23. It can also be seen here that the stair sections 23, like the holding structure 25 of the staircase module 19, are prefabricated from steel profiles.

[0077] FIG. 24 is a lateral sectional view through the staircase 5 according to another embodiment in comparison to the embodiment illustrated in FIG. 21. Here again, a prefabricated staircase module was used, which differs from the embodiment according to FIG. 21 in that the individual stair sections 23 are straight, that is, they do not have any quarter-turned entrances and exits.

[0078] Using this construction, the main landings 7 and the lift platforms 35 are also used as part of the single-flight of stairs 22, as can be clearly seen from FIG. 25, a section with a view of the staircase from FIG. 24 from above, namely through an upper story. As can be seen from this figure, it is a relatively wide staircase, so that the shaft 27 having the cabin 36 can be joined asymmetrically to the staircase 5 and the lift platform 35 in such a way that the traffic space in front of the cabin 36, which is necessary for accessibility or accessibility design, does not coincide with that area of the lift platform 35, on which the straight stair section 23 is joined and which would therefore have to be regarded as part of the single-flight of stairs 22.

[0079] If the staircase has a sufficient width for an embodiment according to FIGS. 24 and 25, it can be advantageous for cost reasons to form the single-flight of stairs 22 from straight-line stair sections 23.