Method for modernizing a building and structure with an elevator system constructed in a building

Abstract

In a method for modernizing a building, a former stairwell of the building is converted such that an elevator shaft of an elevator system to be constructed can be provided in the former stairwell. The elevator shaft is provided in the former stairwell of the building such that stepless access is facilitated to specific floors of the building from an elevator car of the elevator system, which car can be provided in the elevator shaft. A new staircase is constructed outside the former stairwell. In addition, a former staircase is removed from the former stairwell. Furthermore, access bridges are disposed next to the elevator shaft in the former stairwell, thereby enabling flush access from the new staircase to the specific floors.

Claims

1. A method for modernizing a building including converting a former stairwell of the building to enable an elevator shaft of an elevator system to be constructed in the former stairwell, the elevator shaft providing stepless access to specific floors of the building from an elevator car of the elevator system in the elevator shaft, and constructing a new staircase outside the former stairwell, the method comprising the steps of: removing the former staircase from the former stairwell at least in a region of the former stairwell extending over the specific floors; and disposing access bridges next to the elevator shaft constructed in the former stairwell, thereby enabling access from the new staircase to the specific floors.

2. The method according to claim 1 including constructing the new staircase in a new stairwell that is separated from the former stairwell by a wall of the building, the wall being an outer wall of the building or a former outer wall of the building, and forming passages in the wall that are adapted to be closed by doors and facilitate access through the passages from the new staircase to the specific floors via access bridges.

3. The method according to claim 1 wherein the access bridges each have at least a minimally permissible access width, at least along an access portion passing the elevator shaft, between the new staircase and a floor landing of an associated one of the specific floors.

4. The method according to claim 1 wherein the access bridges have an access width, at least along an access portion passing the elevator shaft, between the new staircase and a floor landing of an associated one of the specific floors, that is smaller than a width of a flight stairs of the former staircase.

5. The method according to claim 1 including constructing the new staircase before the former staircase is removed from the former stairwell at least over a region of the former stairwell extending over the specific floors and the access bridges are disposed in the former stairwell.

6. The method according to claim 5 including arranging the access bridges successively in the former stairwell from an uppermost floor of the specific floors to a lowermost floor of the specific floors.

7. The method according to claim 6 including arranging the access bridge for one of the specific floors in the former stairwell and then removing a portion of the former staircase between the one specific floor and a next one of the specific floors underneath the one specific floor.

8. The method according to claim 1 including constructing a wall for the elevator shaft in the former stairwell, and removing the former staircase from the former stairwell at least in the region of the former stairwell extending over the specific floors and disposing the access bridges in the former stairwell before the wall for the elevator shaft is constructed in the former stairwell.

9. The method according to claim 8 including constructing the wall for the elevator shaft from a lowermost floor of the specific floors to an uppermost floor of the specific floors with a plurality of wall elements.

10. The method according to claim 1 including attaching components for the elevator shaft to the access bridges before disposing the access bridges in the former stairwell.

11. The method according to claim 1 including providing a handrail fastened to each of the access bridges at the latest after disposition of the access bridges in the former stairwell and at least until a wall for the elevator shaft is constructed.

12. The method according to claim 1 including constructing the new staircase to enable bringing the access bridges to the specific floors via the new staircase to construct the elevator system, or constructing the access bridges to be longitudinally adjustable.

13. The method according to claim 1 including providing a counterweight space in the elevator shaft on a side of the elevator car nearer the new staircase, or in the elevator shaft on a side of the elevator car further away from the new staircase, or in the new stairwell on a side of the new stairwell nearer the elevator car.

14. The method according to claim 1 including attaching at least one sprinkler head to each of the access bridges, which sprinkler head is adapted to be supplied by a line for extinguishing water integrated in the new stairwell, and providing each of the access bridges with at least one water drain channel that is adapted to drain extinguishing water outward into the new stairwell.

15. A structure having an elevator system constructed in a building, comprising: an elevator shaft of the elevator system being arranged in a converted former stairwell of the building and the elevator system being arranged to provide stepless access to specific floors of the building from an elevator car in the elevator shaft; a new staircase constructed outside the former stairwell; and a plurality of access bridges disposed next to the elevator shaft in the former stairwell that provide flush access from the new staircase to the specific floors via the access bridges.

Description

DESCRIPTION OF THE DRAWINGS

(1) Embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are denoted by the same reference signs. In the drawings:

(2) FIGS. 1A and 1B are flow diagrams for explaining an embodiment of the invention; and

(3) FIG. 2A to 2F are partial, schematic, three-dimensional views of a building in different states according to a possible conversion with the construction of an elevator system corresponding to a possible embodiment of the invention.

DETAILED DESCRIPTION

(4) FIGS. 1A and 1B are flow diagrams for explaining an embodiment of the invention. The flow diagram is shown in two parts here, there being a connection at the connector A-B. The flow diagram begins with a state Z1, in which a building 1 is in an initial state. The building 1 comprises a former stairwell 3 having a former staircase 4. The former stairwell 3 and the former staircase 4 are referred to as former in this case in order to ensure that referencing is consistent throughout. In the context of planned conversion work to the building 1, the former staircase 4 is removed at least in substantial parts, so that it no longer functions as a staircase.

(5) The former staircase 4 comprises flights of stairs 5, 6, 7 (FIG. 2D). The view of the state Z1 shows the flights of stairs 5, 6. The flights of stairs 5, 6 are interconnected via an intermediate landing 8 of the former staircase. Furthermore, a floor landing 9 is provided which is observed as independent of the former staircase 4 here. This means that the floor landing 9 is at least substantially maintained in the context of the conversion works, even if the floor landing 9 has the function of a stair landing of the former staircase 4.

(6) Rooms 12, 13 inside the building 1 are accessible from the floor landing 9 via doors 10, 11. For access to the rooms 12, 13, access to the floor landing 9 is essential.

(7) The building 1 comprises a wall 15, which is an outer wall 15 in this embodiment. In this embodiment, a window 16 is inserted into the outer wall 15, so that daylight can enter the former stairwell 3.

(8) In the state Z2, a new staircase 17 is constructed outside the former stairwell 3. In this case, the new staircase 17 is separated from the former stairwell 3 by the wall 15. In this case, the new staircase 17 can be protected from weather influences by side walls 18, 19, 20, of which the side walls 18, 19 connect to the wall 15. The side walls 18 to 20 enclose a new stairwell 21 for the new staircase 17. It is optionally also possible, however, that one or more of the side walls 18 to 20 are attached only at a later point in time. In particular, the side wall 20 may initially remain open in order to bring necessary building materials or components to the individual floors via the new staircase 17.

(9) In the state Z3, the wall 15 has been converted such that the window 16 is dispensed with and is correspondingly closed in part and that a door 22 is integrated into the wall 15 at a passage 14 introduced into the wall 15, via which door access is facilitated into the former stairwell 3 from the new staircase 17. Furthermore, a horizontal access bridge 24 is arranged between the new staircase 17 and the floor landing 9. When the door 22 is open, substantially flush access from the new staircase 17 to the floor landing 9 via the new staircase 17, the passage 14 and the access bridge 24 is possible. The two flights of stairs 5, 6 can be demolished at substantially the same time. The access bridge 24 is connected at one end to the substantially existing floor landing 9 and the other end can be connected to a staircase landing 23 of the new staircase 17 or it can alternatively be supported on existing side walls of the former stairwell 3, for example.

(10) The measure described with reference to state Z3 is correspondingly repeated for each floor, until the former staircase 4 is completely demolished. This can lead to an open space 25 in the state Z4, for example, which open space can be used inter alia for the insertion of an elevator system 2.

(11) In the state Z5, the open space 25 is used in part by the elevator system 2, an elevator car 27 of the elevator system 2 being arranged in an elevator shaft 26 of the elevator system 2. Furthermore, a counterweight space 29 is provided on the side 28 nearer the new staircase 17, in which counterweight space a counterweight 30 of the elevator system 2 is arranged. Furthermore, the access bridge 24 is extended to a landing 31.

(12) In a modified embodiment, the counterweight space 29 may also be arranged on the side 32 of the elevator car 27 further away from the new stairwell 21.

(13) As shown in the state Z5, the access bridge 24 comprises an access portion 35 passing the elevator shaft 26. The access portion 35 is designed having a minimum permissible access width 36 in this case. Additionally or alternatively, the access portion 35 may also have an access width 36 which is smaller than a width 37 of a former flight of stairs 6 of the former staircase 4, as shown in state Z3. As a result, in particular a width 38 of the elevator shaft 26 is optimally large.

(14) This ensures stepless and preferably barrier-free access to the spaces 12, 13 from the elevator car 27 via the access bridge 24 and the floor landing 9.

(15) In the embodiment shown in FIGS. 1A and 1B, an elevator car door may be provided on the side 32 nearer the floor landing 9, or on a side 39 nearer the access bridge 24. When there is sufficient space, it may be advantageous to arrange the elevator car door on the side 32, as this is nearer the doors 10, 11 to the rooms 12, 13. However, arranging on the side 39 usually has the advantage that a larger door opening is possible due to a correspondingly large elevator car door. In a specific arrangement, the door leaves of an elevator car door can also be arranged over a corner of the elevator car 27, which corner preferably relates to the sides 32, 39, thereby allowing very wide access to the elevator car 27.

(16) In a modified embodiment, in which the counterweight 30 is arranged for example on the side 32 of the elevator car 27, it is possible to exit via the side 28 to the platform 31. This facilitates access to the elevator car 27 on the ground floor.

(17) The structure and arrangement of the new stairwell 21 can take fire safety requirements into consideration by maintaining appropriate distances to adjacent windows 40, 41 of the building 1. In addition, modernizing elements, such as a riser for extinguishing water, communication lines and the like, can also be arranged in the new stairwell 21 and/or in the former stairwell 3.

(18) Auxiliary means related to fire safety can be integrated in the new stairwell 21 and the access bridge 24. The access bridge 24 can therefore be equipped with sprinkler systems or with sprinkler heads 33 (FIG. 2E), which are supplied by lines for extinguishing water integrated in the new stairwell 21. At the same time, the access bridges 24 may also be provided with water drain channels 34 (FIG. 2F) which divert extinguishing water outward into the new stairwell 21 if necessary. In principle, the access bridge 24 can therefore be designed as a protective zone.

(19) A space-saving design of the elevator system 2 with simultaneously large car dimensions of the elevator car 27 and of the elevator shaft 26 can be achieved. Simultaneously, further safety requirements for the building, such as requirements with regard to fire safety, can be easily met.

(20) FIG. 2A to 2F are partial, schematic, three-dimensional views of the building 1 in different states according to a possible conversion with the construction of an elevator system 2 corresponding to a possible embodiment of the invention. It should be noted here that modifications are shown with regard to the embodiment shown in FIGS. 1A and 1B.

(21) The conversion generally relates to specific floors 42 to 46, which are usually specified by planning the conversion project. Correspondingly, a region 61 of the former stairwell 3 extending over the specific floors 42 to 46 is produced, in which region the former staircase 4 is removed from the former stairwell 3, according to planning. In this case, all the floors 42 to 46 shown are specified, for example, and the region 61 relates to the entire former staircase 4.

(22) FIG. 2A shows the building 1 as an existing building 1. In this case, an entrance door 50 is provided via which the former stairwell 3 is accessible. In the context of conversion, the entrance door 50 can be converted without barriers or a barrier-free entrance door 50 of this kind can be implemented at another location. In this embodiment, the former stairwell 3 is closed at the top by a roof slope 51.

(23) FIG. 2B shows a first conversion measure. In this case, a new stairwell 21 is produced in front of the outer wall 15 of the building 1. The new stairwell 21 is protected from weather influences by side walls 18, 19, 20 and a new roof element 52. Due to the open view, the side wall 19 is not shown; however, said side wall is implemented opposite the side 18 in accordance with the view shown in FIGS. 1A and 1B. Glass elements can advantageously be integrated in the side walls 18 to 20, in order to allow daylight to enter the new stairwell 21. Furthermore, a design consisting of a correspondingly fire-resistant material may be possible in some cases, in order to provide fire protection. The roof element 52 functions simultaneously as an upper end of the former stairwell 3 after the building 1 has been converted. In this case, components 53, 54, in particular fastening elements 53, 54, which are used to construct the elevator system 2 can be fastened to the roof element 52, which may be provided as a prefabricated part.

(24) The new staircase 17 is constructed in the new stairwell 21. Furthermore, conversion is carried out on the wall 15, windows 16 being replaced with a door 22 and a window 56 by combination elements 55 in this embodiment. In this embodiment, this is achieved in that an additional wall 57 is constructed in front of the previous outer wall 15. The outer wall 15 can then be completely or partially demolished in the region of the former stairwell 3. However, other conversion measures are also conceivable.

(25) In the context of conversion, the roof slope 51 is also removed at least in part.

(26) FIG. 2C shows a state of the building 1 during conversion, the roof pitch 51 already being demolished and the access bridge 24 being inserted into the former stairwell 3. A handrail 60 is also installed on the access bridge 24, so that passengers cannot fall into the existing elevator shaft 26. In this state, access is possible to all the floors 42 to 46 of the building 1. This access is possible specifically either via the former staircase 4 or via the new staircase 17 and the access bridge 24 with regard to the level on the floor landing 9. This means that only the level of the building 1 on the floor landing 9 is subject to temporary access restrictions due to the conversion work.

(27) Subsequently, the flights of stairs 5, 6 and the intermediate landing 8 of the former staircase 4 are demolished.

(28) FIG. 2D shows the building 1, a further access bridge 24A already being inserted with regard to a lower floor. Access to a floor landing 9A is possible from the new staircase 17 via the access bridge 24A.

(29) Correspondingly, the further flights of stairs, in particular the flight of stairs 7, of the former staircase 4 are then demolished from the top to the bottom in a stepwise manner and access bridges 24B, 24C relevant thereto are introduced into the former stairwell 3.

(30) FIG. 2E shows the building 1 after the former staircase 4 has been demolished floor by floor. The region 61 over which the former staircase 4 is demolished extends over the entire former staircase 4. However, the region 61 can extend only over part of the former staircase 4. For example, the former staircase 4 can also lead to a basement, the portion of the former staircase 4 relevant thereto being maintained. The basement is a floor which is not affected and therefore does not belong to the specific floors, i.e. the floors 42 to 46 here.

(31) Furthermore, wall elements 62 can be arranged in the former stairwell 3 preferably from bottom to top and in particular can be connected to the access bridges 24, 24A to 24C.

(32) FIG. 2F shows the converted building 1 having the schematically shown constructed elevator system 2. In this case, the wall elements 62 form a wall 63. The elevator car 27 and the counterweight 30 are therefore suspended from at least one suspension means 65 inside the elevator shaft 26, which is enclosed by the wall 63 and a building wall 64 (see FIG. 1B). A schematically shown drive machine unit 66 having a drive sheave can be fastened to the components 53, 54, around which drive sheave the at least one suspension means 65 is guided.

(33) Furthermore, guide rails for the counterweight 30 and the elevator car 27 can be arranged in the elevator shaft 26.

(34) Components, in particular correspondingly dimensioned parts of the wall elements 62, door attachments or fastening structures for fastening guide rails, can already be attached to the access bridges 24, 24A to 24C when the access bridges 24, 24A to 24C are arranged in the former stairwell 3. The handrail 60 can therefore be designed as part of the wall element 62 of the elevator shaft 26, for example, or a door threshold of a shaft door can be attached to the access bridge.

(35) The invention is not limited to the embodiment, possible design and modifications described.

(36) In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.