AU2007254654A1 - Lift installation in a building with at least one transfer storey - Google Patents

Description

P001 Section 29 Regulation 3.2(2)

AUSTRALIA

Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: Invention Title: Lift installation in a building with at least one transfer sto:rey The following statement is a full description of this invention, including the best method of performing it known to us: (Lift installation in a building with at least one transfer storey SThe invention relates to a lift installation in a building with at least one transfer storey. This invention is defined in the introductory part of the independent patent claim.

Modern lift concepts for buildings with thirty and more storeys have transfer storeys which are served by a lift installation. Such a lift installation comprises a group of at least two lifts. A first lift directly serves the transfer storeys from an entrance lobby, i.e. passengers Sare coarsely distributed relatively quickly from the entrance lobby by a high-speed lift to S 10 the different transfer storeys. A second lift carries out fine distribution of the passengers r from the transfer storeys to the destination storeys thereof.

A lift usually comprises a lift cage, which is vertically movable in a shaft and receives passengers in order to transport these to a desired storey of a building. In order to be able to look after this task the lift usually has at least the following lift components: a drive with a motor and a drive pulley, deflecting rollers, tension means, a counterweigh: as well as a respective pair of guide rails for guidance of a lift cage and a counterweight.

In that case the motor produces the power required for transport of the passengers present in the lift cage. An electric motor usually looks after this function. This directly or indirectly drives a drive pulley, which is in friction contact with a tension means. The tension means can be a belt or a cable. It serves for suspension as well as conveying the lift cage and the counterweight, which both are so suspended that the gravitational forces thereof act in opposite direction along the tension means. The resultant gravitational force which has to be overcome by the drive, correspondingly substantially reduces. In addition, due to the greater contact force of the tension means with the drive pulley a greater drive moment can be transmitted by the drive pulley to the tension means. The tension means is guided by deflecting rollers.

The optimum utilisation of the shaft volume has ever increasing significance in lift construction. Particularly in high-rise buildings with a high degree of utilisation of the building a management of the passenger traffic as efficiently as possible for a given shaft volume is desired. This objective can be achieved firstly by an optimum space-saving arrangement of the lift components, which creates space for larger lift cages, and secondly by lift concepts which enable vertical movement of several independent lift cages in one shaft.

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SEP 1 526 103 shows a lift installation with at least two lifts in a building, which is divided up into zones. A zone in that case comprises a defined number of storeys which are served by a lift. A zone is allocated to each lift. A transfer storey is provided in order to go from one zone to another zone. At least one of the lifts has two lift cages which are movable independently of one another vertically one above the other at two cage guide rails. The arrangement of two fetch or carry cages is to assist with preventing unnecessary waiting times at the transfer storeys.

S (Ni A lift with at least two lift cages disposed one above the other in the same shaft is known from EP 1 489 033. Each lift cage has an own drive and an own counterweight. The drives are arranged near first and second shaft walls and the counterweights are also respectively suspended below the associated drive at drive or holding cables near first or second shaft walls. The axes of the drive pulleys of the drives are disposed perpendicularly to first and second shaft walls. The two independently movable lift cages ensure a high conveying performance. The positioning of the drives in the shaft near first or second walls renders a separate engine room superfluous and enables a space-saving, compact arrangement of the drive elements in the shaft head.

The object of the present invention is to further increase the conveying performance of a lift installation for a given shaft cross-section in a building with zonal division and at least one transfer storey.

The above-mentioned object is fulfilled by the invention in accordance with the definition of the independent patent claim.

The lift installation according to the invention lies in a building with at least two lifts, wherein the building is divided into building zones and each lift has at least one lift cage.

Each lift cage is movable independently by way of an own drive in an associated cage zone. In addition, each cage zone has at least one transfer storey. A first lift has at least three lift cages arranged vertically one above the other in a shaft. At least three of these cage zones are allocated to a building zone.

Thanks to the at least three lift cages, which are independently movable one above the Sother, of a lift, the lift installation has a significantly higher conveying performance. Waiting times at transfer storeys are thus further reduced and the creation of waiting loops is Slargely avoided.

Advantageously this at least one lift cage of a second lift is a multi-cage with at least two cages arranged vertically one above the other. These two cages are associated with the \same cage zone, since they are physically connected and can thus be moved only in common.

S 10 The advantage of the lift installation with a double-cage resides in the dcloubling of the (N available cage volume of a lift cage. Thus, up to twice as many passengers can be conveyed by one journey.

Advantageously the multi-cage serves at least two transfer storeys disposed one above the other.

The advantage of the lift installation is that in the case of doubling of the transfer storeys the waiting times on the respective transfer storeys can be further reduced. The transfer storeys have a transfer or waiting space for the transfer. In the case of a doubled number of such transfer spaces the transfer takes place substantially free of conflict and if, notwithstanding the increased conveying performance waiting times should nevertheless occur, the passengers have available twice the volume of waiting space. Staying in the transfer storeys or transfer or waiting spaces is thus more pleasant in every instance.

Advantageously the at least three lift cages of the first lift have a middle and two adjacent lift cages. The middle lift cage is in that case independently movable in a middle cage zone and the two adjacent lift cages are independently movable in two adjacent cage zones. With further advantage the middle cage zone overlaps adjacent cage zones.

The advantage of the lift installation with such overlapping cage zones is that passengers can, at any desired storey which lies in the region of overlap of the cage zones, transfer from a middle cage zone to an adjacent cage zone. This enables a more flexible conduct of the passengers. In addition, storeys in the overlap region of the cage zones are served by two lift cages and thus the conveying performance of the lift installation is increased.

(Advantageously the at least three drives associated with the lift cages can be moved past 0by the lift cages.

The lift installation has the advantage that the drives can be arranged in space-saving and flexible manner in the shaft without coming into conflict with the lift cages.

Advantageously the at least three drives associated with the lift cages are positioned at a first shaft wall or a second, opposite shaft wall.

S 10 The advantage of the lift installation resides in the position of the drives between lift cages Sand first and second shaft walls. Space in the shaft head or shaft pit, where the drives are usually arranged, can thereby be saved.

Advantageously the drive of the middle lift cage is positioned at the first shaft wall and the two drives of the adjacent lift cages are positioned at the opposite, second shaft wall.

The advantage of the lift installation resides in the flexible and simple positioning of however many drives and the associated lift cages in the same shaft. In a conventional arrangement of the drives in the shaft head, thereagainst, the number of drives which can be installed is limited by the space available in the shaft head. Equally, a guidance of the tension elements free of conflict in such a conventional arrangement of the drives in the shaft head is subject to close limits.

The invention is clarified and further described in detail in the following by examples of embodiment and drawings, in which: Fig. 1 shows a schematic side view of an arrangement of a lift of a lift installation with three lift cages, three drives, three drive pulleys, three tension means and several deflecting rollers; Fig. 2 shows a schematic plan view of an arrangement of the lift of a lift installation according to Fig. 1; Fig. 3 shows a schematic plan view of an optional arrangement of a lift of a lift installation according to Fig. 1; Fig. 4 shows a side view of an arrangement of the drives on cross nmembers;

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Fig. 5 shows a schematic side view of a lift installation in a building with two building zones; and Fig. 6 shows a schematic side view of a lift installation in a building with four building zones.

S 10 The shaft is a space which is defined by six boundary planes and in which one or more lift N cages can be moved along a travel path. Usually four shaft walls, a ceiling and floor form these six boundary planes. However, it is equally conceivable that an upper or lower travel path limitation represents a boundary plane. This definition of the shaft can be expanded in the sense that several travel paths, along each of which one or more lift cages are movable, are also arranged in a shaft horizontally adjacent to one another.

Figure 1 shows a lift with at least three lift cages 7a, 7b, 7c which each have an own drive Al, A2, A3 and are movable independently of one another in vertical direction. In that case a middle lift cage 7a is arranged between two adjacent lift cages 7b, 7c, which are disposed respectively below and above the middle lift cage 7a.

The associated drives Al, A2, A3 are positioned laterally at first and second shaft walls.

The first and second shaft walls are those mutually opposite shaft walls not having shaft doors. The drive Al of the middle lift cage 7a is positioned at the first shaft wall and the two drives A2, A3 of the adjacent lift cages 7b, 7c are positioned at the opposite second shaft wall. In that case the drives Al, A2, A3 are positioned in alternation on opposite shaft walls. Additional drives (not shown) of further lift cages are alternately arranged at first and second shaft walls in correspondence with the alternating ordering of the drives.

The drives Al, A2, A3 are positioned in Fig. 1 at three different shaft heights, wherein the drives A2, A3 of adjacent lift cages 7b, 7c are positioned above or below the drive Al of the middle lift cage 7a. As a rule the distance in vertical direction between a middle drive Al and an adjacent drive A2, A3 is at least one cage height.

It is, however, also possible to position two drives at the same shaft height. For example, the drive Al of the middle lift cage 7a can be arranged on a first shaft wall and the drive A3 of the adjacent, upper lift cage 7c on the opposite, second shaft wall at l:he same shaft Sheight. The advantage of this arrangement resides in the simple maintenance of the two drives Al, A3. These can, in particular, be maintained from a common platform.

A drive Al, A2, A3 has a respective motor M1, M2, M3 and a respective drive pulley la, ib, Ic. The motor M1, M2, M3 is disposed in operative contact with the drive pulley la, b, ic and drives the tension means Z1, Z2, Z3 by means of this drive pulley la, ib, ic.

The drive pulley la, ib, Ic is so designed that it is suitable for receiving one or more tension means Z1, Z2, Z3. The tension means Z1, Z2, Z3 are preferably belts, such as C1 wedge-ribbed belts with ribs at one side which engage in one or more depressions at the drive pulley side. Belt variants such as smooth belts and belts toothed on one side or both sides with corresponding drive pulleys la, Ib, Ic are equally usable. In addition, different kinds of cables such as single cables, double cables or multiple cables are also usable.

The tension means Z1, Z2, Z3 comprise strands of steel wire or aramide or Vectran.

The at least three lift cages 7a, 7b, 7c and three counterweights 12a. 12b, 12c are suspended at the tension means Z1, Z2, Z3 in block-and-tackle manner. In that case the lift cages 7a, 7b, 7c have at least one first and at least one second deflecting roller 2a, 2b, 2c, 3a, 3b, 3c which are fastened in the lower region of the lift cages 7a, 7b, 7c. These deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c have, at the outer circumference, one or more grooves which are such that they can receive one or more tension means Z1, Z2, Z3. The deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c are thus suitable for the guidance of tension means Z1, Z2, Z3 and are brought into contact with the latter. A lift cage 7a, 7b, 7c is thus preferably suspended as a lower block-and-tackle.

In an optional form of embodiment the deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c are disposed in the upper region of the lift cage 7a, 7b, 7c. In correspondence with the above description, the lift cage 7a, 7b, 7c is then suspended as an upper block-and-tackle.

Disposed in the upper region of the counterweights 12a, 12b, 12c is a third deflecting roller 4a, 4b, 4c, which is similarly suitable, analogously to the deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c, to receive one or more tension means Z1, Z2, Z3. Correspondingly, the counterweight 12a, 12b, 12c is preferably suspended at the third deflecting roller 4a, 4b, 4c as an upper block-and-tackle below the associated drive Al, A2, A3.

The tension means Z1, Z2, Z3 is led from a first fixing point 5a, 5b, 5c to a second fixing Spoint 6a, 6b, 6c via first, second and third deflecting rollers 2a, 2b, 2c, 3a, .3b, 3c, 4a, 4b, 4c and the drive pulley la, Ib, ic from a first shaft wall to the second shaft wall. The first fixing point 5a, 5b, 5c is in that case disposed opposite the associated drive Al, A2, A3 at approximately the same shaft height in the vicinity of a first or second shaft wall. The second fixing point 6a, 6b, 6c is disposed in the vicinity of the associated drive Al, A2, A3

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on an opposite second or first shaft wall.

S 10 The tension means Z1, Z2, Z3 runs from the first fixing point 5a, 5b, 5c along a first or C1 second shaft wall downwardly to the second deflecting roller 3a, 3b, 3c, loops around this from the outside to the inside at an angle of approximately 900 and leads to the first deflecting roller 2a, 2b, 2c. The tension means Z1, Z2, Z3 loops around this first deflecting roller 2a, 2b, 2c from the inside to the outside again through approximaltely 900 and is thereafter led along the lift cage 7a, 7b, 7c upwardly to the drive pulley 'la, ib, ic and loops around this from the inside to the outside through approximately 1500. Depending on the setting of the optional setting pulley 13a, 13b, 13c the looping angle can be set in a range of 90 to 1800. The tension means Z1, Z2, Z3 is thereafter led along a second or first shaft wall downwardly to the third deflecting pulley 4a, 4b, 4c, loops around this from the outside to the inside through approximately 1800 and is again led along a second or first shaft wall upwardly to the second fixing point 6a, 6b, 6c.

As mentioned above, a setting pulley 13a, 13b, 13c is an optional component of the drive Al, A2, A3. With this setting pulley 13a, 13b, 13c the looping angle of the tension means Z1, Z2, Z3 at the drive pulley la, ib, ic can be set, or increased or reduced, in order to transmit the desired traction forces from the drive pulley la, ib, ic to the tension means Al, A2, A3. Depending on the respective spacing of the setting pulley 13a, 13b, 13c from the drive pulley la, ib, Ic the spacing of the tension means Z1, Z2, Z3 from the drive Al, A2, A3, from the counterweight 12a, 12b, 12c or from the lift cage 7a, 7b, 7c can additionally be set. A conflict-free guidance of the tension means Z1, Z2, Z3 in the shaft between the drive pulley la, Ib, 1c and the first deflecting roller 2a, 2b, 2c is thus guaranteed.

A lift cage 7a, 7b, 7c as well as the respectively associated drives Al, A2, A3, drive pulleys la, Ib, Ic, deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c, 4a, 4b, 4c, optional setting Spulleys 13a, 13b, 13c, counterweights 12a, 12b, 12c, tension means Z1, Z2, Z3 and fixing 0 points 5a, 5b, 5c, 6a, 6b, 6c form a lift unit. Consequently, Fig. 1 shows a lift which has Sthree lift units, which in turn forms a triple group 14.

Proceeding from the middle lift unit with the lift cage 7a, the adjacent lower lift unit with the lift cage 7b and an adjacent upper lift unit with lift cage 7c are respectiwvely arranged in mirror image with respect to the middle one. The drives A1, A2, A3 of the lift units thus lie on mutually opposite first or second shaft walls and the associated drive pulleys 1 a, 1 b, C Ic, deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c, 4a, 4b, 4c, setting pulleys 13a, 13b, 13c, S 10 counterweights 12a, 12b, 12c, tension means Z1, Z2, Z3 and fixing points 5a, 5b, 5c, 6a, 6b, 6c of adjacent lift cages 7a, 7b, 7c are also arranged in mirror image. This rule of mirror-image arrangement of middle and adjacent lift units applies to any desired number of lift units installed in a shaft.

A further characteristic of the arrangement of the lift units is that the associated drives Al, A2, A3 and first fixing points 5a, 5b, 5c are positioned at approximately the same height at opposite first and second shaft walls. The shaft height predetermined by the fixing points 5b, 5c and drives Al, A2, A3 is also at the same time the highest point which an associated lift cage 7a, 7b, 7c can reach, since the tension means in the illustrated form of embodiment cannot raise a suspension point of a lift cage 7a, 7b, 7c above the height of the drive pulley la, Ib, Ic. The positioning of the drives Al, A2, A3 and first fixing points 5b, 5c of the middle and adjacent lift cages 7a, 7b, 7c is usually carried out at different shaft heights. The lift cages 7a, 7b, 7c can thus reach only different maximum shaft heights. Correspondingly, the middle and the adjacent lift cages 7a, 7b, 7c are allocated to different cage zones in which the lift cages 7a, 7b, 7c are movable.

The cage zones K1, K2, K3 allocated to the lift cages 7a, 7b, 7c are evident, in Fig. 1. It is apparent therefrom that the shaft height of a drive Al, A2, A3 in the afore-described configuration predetermines the maximum shaft height of such a cage zone K1, K2, K3.

The minimum shaft height of a cage zone K1, K2, K3, thereagainst, is defined by the drive Al, A2, A3 of the next-but-one lift unit disposed thereunder. In the illustrated example of embodiment the counterweight 12c of the adjacent upper lift cage 7c and the drive A2 of the next-but-one adjacent lower lift cage 7b disposed thereunder is disposed, due to the mirror-image construction of middle and adjacent lift units, on the same first or second shaft wall. The deepest shaft height reachable by the counterweight 12c is thus limited by the drive A2 disposed thereunder on the same shaft wall. The travel range of the counterweight 12c between drive A2 and the drive A3 thus defines, for simultaneous 2:1 C)suspension of the associated lift cage 7c and counterweight 12c, the cage zone K3 of the lift cage 7c.

If use is made of this teaching for the triple group 14, partly overlapping cage zones K1, K2, K3 result, wherein only middle and adjacent cage zones K1, K2, K3 overlap. In a

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high-rise building with several triple groups 14 arranged one above the other all storeys disposed in a middle cage zone K1 are thus served by two lift cages.

N According to Fig. 2 the lift cages 7a, 7b, 7c are guided by two cage guide rails 10.1, 10.2.

The two cage guide rails 10.1, 10.2 form a connecting plane V which extends in each instance approximately through the centre of gravity S of the two lift cages 7a, 7b, 7c. In the illustrated form of embodiment the lift cages 7a, 7b, 7c are suspended eccentrically.

Here only the arrangement of two lift units arranged directly one above the other is shown.

However, it is clear to the expert that the arrangement for further pairs of lift units arranged directly one above the other takes place analogously thereto.

The tension means Z1, Z2, Z3 and the associated guide means, such as deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c, 4a, 4b, 4c and drive pulleys la, Ib, Ic, in this suspension arrangement lie on one side of the connecting plane V, wherein the deflecting rollers 4a, 4b, 4c are, for the sake of clarity, not illustrated in Fig. 2, i.e. all afore-mentioned components associated with a lift cage 7a, 7b, 7c lie either between third shaft walls and the connecting plane V or between fourth shaft walls and the connecting plane V. Third or fourth shaft walls denote shaft walls which have at least one shaft door 9 and opposite shaft walls. The spacing y of the tension means Z1, Z2, Z3 and the connecting plane V is advantageously approximately the same. The tension means Z1, Z3 of a lift cage 7a, 7b, 7c lie alternately on one or the other side of the connecting plane V. Thus, the moments produced by the eccentric suspension of the lift cages 7a, 7b, 7c have opposite effect. In the case of the same rated load of the lift cages 7a, 7b, 7c and in the case of an even number of the lift cages 7a, 7b, 7c the moments acting on the guide rails 10.1, 10.2 significantly rise.

The counterweights 12a, 12b, 12c are guided by two counterweight guide rails 11a.1, 11a.2, 11b.1, 11b.2. The counterweights 12a, 12b, 12c are positioned at opposite shaft walls between the cage guide rails 10.1, 10.2 and first or second shaft walls.

Advantageously, the counterweights 12a, 12b, 12c are suspended at their centre of gravity Sat the tension means Z1, Z2, Z3. Since the lift cages 7a, 7b, 7c are eccentrically suspended, the counterweights 12a, 12b, 12c are laterally offset in the vicinity of third and fourth shaft walls.

The axes of rotation of the drive pulleys la, Ib, Ic and of the deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c, 4a, 4b, 4c lie parallel to the first or second shaft walls. In the illustrated embodiment the afore-mentioned components are of the form that they can accept four O 10 parallelly extending tension means Z1, Z2, Z3, guide these or, in the case of the drive C1 pulley la, ib, ic, also drive these. In order to be able to receive the tension means Z1, Z2, Z3 the deflecting rollers 2a, 2b, 2c, 3a, 3b, 3c, 4a, 4b, 4c and drive pulleys la, ib, ic have four specially constructed contact surfaces, which in the case of cables are designed, for example, as grooves or in the case of belts, for example, also as dished surfaces or toothing or, in the case of a contact surface of flat construction, are provided with guide shoulders. These four contact surfaces can be formed either on a common roller-shaped base body or respectively on four individual rollers with a common axis of rotation.

With knowledge of this form of embodiment numerous possibilities of variation according to the respective objective are available to the expert. Thus, this can arrange one to four or more individual rollers with or without a spacing relative to one another on one axis of rotation. In that case each roller can accept, depending on the respective design, one to four or, in the case of need, even more tension means Z1, Z2, Z3.

In normal operation of the lift the lift cages 7a, 7b, 7c are placed at a storey stop flushly with the storey and the cage doors 8 are opened together with the shaft doors 9 so as to enable transfer of passengers from the storey to the lift cages 7a, 7b, 7c and conversely.

Fig. 3 shows an alternative suspension arrangement with centrally suspended lift cages 7a, 7b, 7c. Here only the arrangement of two lift units arranged directly one above the other is shown. However, it will be clear to the expert that the arrangement for further pairs of lift units arranged directly one above the other takes place analogously thereto.

In that case the tension means Z1, Z2, Z3 are led from the deflecting rollers and drive 11 pulleys la, Ib, Ic on both sides of the connecting plane V. Advantageously, the 0suspension is then arranged symmetrically with respect to the connecting plane V. Since Sin this case the suspension centre of gravity substantially coincides with the centre of gravity S of the lift cages 7a, 7b, 7c no additional moments act on the cage guide rails 10.1, 10.2.

In this central suspension of the lift cages 7a, 7b, 7c the associated deflecting rollers 2a.1, 2a.2, 2b.1, 2b.2, 3a.1, 3a.2, 3b.1, 3b.2 and drive pulleys la.l, la.2, lb.1, lb.2 consist of at least two rollers arranged on the left and right of the connecting plane V. The deflecting S 10 rollers 4a, 4b, 4c of the counterweights 12a, 12b, 12c similarly consist of two rollers C" arranged on the left and the right of the connecting plane V, but for the sake of clarity not illustrated in Fig. 3. In the present example the deflecting rollers 2a.1, 2a.2, 3a.1, 3a.2 and the drive pulleys la.1, la.2, which are associated with the middle lift cage lie at a first spacing x from the connecting plane V and the deflecting rollers 2b.1, 2b.2, 3b.1, 3b.2 and the drive pulley Ib, which are associated with the adjacent lower lift cage 7b, at a second spacing X from the connecting plane V, wherein the first spacing x is snmaller than the second spacing X. A conflict-free guidance of the tension means Z1, Z2, Z3 in the case of central suspension of the lift cages 7a, 7b, 7c is thereby guaranteed.

Here, too, the counterweights 12a, 12b, 12c are advantageously suspended at their centre of gravity S at the tension means Z1, Z2, Z3 between the cage guide rails 10.1, 10.2 and first or second shaft walls. Since the lift cages 7a, 7b, 7c are now centrally suspended, the counterweights 12a, 12b, 12c also lie in a central region of the first and second shaft walls.

Thanks to this central position of the counterweights 12a, 12b, 12c the free space between the lateral ends of the counterweights 12a, 12b, 12c and third and fourth shaft walls increases. Design freedom for the counterweights 12a, 12b, 12c is thereby gained. Thus, for example, a narrower and wider counterweight 12a, 12b, 12c can be us;ed in order to better utilise the space. For a given shaft cross-section, the lift cage 7a, 7b, 7c gains width or, for a given cage size, the shaft cross-section can be reduced.

The centric and eccentric suspension variants, which are shown in Figs. 2 and 3, can be combined as desired with the following examples of Figs. 5 and 6.

As shown in Fig. 4, the drive Al has a motor M1, preferably an electric motor, a drive pulley la and optionally a setting pulley 13a by which the looping angle of the tension Smeans Z1 about the drive pulley la and the horizontal spacing of the tension means Z1 from the drive Al to the lift cage 7a or counterweight 12a can be set.

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The motor M1 lies vertically above the drive pulley la. Thanks to this arrangement the drive can be positioned in the clear projection of the counterweights 12a between the lift cages 7a and first and second shaft walls. The drives Al can thereby be moved past by the lift cages 7a and can thus be mounted in an otherwise unneeded space of the shaft.

By comparison with conventional lifts without an engine room there is thereby obtained space in the shaft head and/or in the shaft pit.

N According to Fig. 4 the drive Al is fixed on a cross member 19, which is fastened to a cage guide rail 10.1 and/or to the counterweight guide rails 11la.l, 11a.2. There can be further seen in Fig. 4 the third deflecting roller 4a, at which the counterweight 12a is suspended, and in the background the lift cage 7a. The example shown here is in mirror image with respect to the connecting plane V by comparison with the arrangement of Fig.

2.

The drives Al can also be optionally fixed directly on the shaft walls and in that case the cross members 19 are saved.

Fig. 5 shows a lift installation for a building with zonal division. A building zone G1, G2 is composed of several stories of the building disposed vertically one above the other. In that case at least one of these storeys of a buildings zone G1, G2 is a so-termed transfer storey U1, U2. It is usual to go from one building zone G1 to another building zone G2 by means of a feeder lift which stops only at the transfer storeys. Here this feeder lift is designed as a high-speed lift. The number of remaining storeys allocated to a building zone G1, G2 is defined by those storeys which are served by a take-away lift 14.1, 14.2.

This take-away lift 14.1, 14.2 undertakes fine distribution of the passengers from the transfer storeys U1, U2 to the destination storeys thereof.

The building is here divided into two building zones G1, G2. Allocated to each of these building zones G1, G2 is a triple group 14.1, 14.2 which exclusively serves storeys of the allocated building zone G1, G2. The lift installation has three lifts which are arranged in two shafts 15.1, 15.2. Disposed in the first shaft 15.1 are two triple groups 14.1, 14.2, which are arranged one above the other, with six lift units, six lift cages and the associated Scage zones K1.1, K1.2, K1.3, K2.1, K2.2, K2.3. A change from the first building zone G1 to the second building zone G2 thus necessarily takes place by way of the lift of the Ssecond shaft 15.2 and only from the transfer storeys U1.1, U1.2 of the building zone G1 to the transfer storeys U2.1, U2.2 of the building zone G2. The two triple groups 14.1, 14.2 are responsible for the transport of the passengers from the transfer storeys U2.1, U2.2 to a storey of the corresponding building zone G1, G2 and between any two toreys within a building zone G1, G2. A more efficient channelled transport of passengers within the building is thus achieved.

The first shaft 15.1 can be optionally subdivided into two separate individual shafts each C1 with a respective lift. The shaft height of these individual shafts is substantially oriented to the height of the corresponding building zone G1, G2. The advantage of such separated individual shafts is the elimination of chimney effect and in turn also the elimination of undesired strong shaft draughts, such as can occur in high shafts.

A high-speed lift which exclusively serves transfer storeys U1.2, U1.1, U2.1, U2.2 is moved in the second lift shaft 15.2. This high-speed lift is, in the illustrated example, a double-decker lift with two fixedly connected cages which are arranged vertically one above the other and are movable in common in the shaft 15.2. These double-decker cages serve two transfer storeys U1.2, U1.1, U2.1, U2.2 arranged directly one above the other.

Each cage zone K1.1, K1.2, K1.3, K2.1, K2.2, K2.3 in each building zone G1, G2 has at least one transfer storey U1.2, U1.1, U2.1, U2.2. The following arrangement, by way of example, results in the upper building zone G2: the transfer storeys U2.1, U2.2 of the double-decker lift lie in a central region of the building zone G2, the lower transfer storey U2.2 is served by the lower cage of the double-decker cage and the middle and lower adjacent lift cage of the triple group 14.1 and the upper transfer storey U2.1 is served correspondingly by the upper cage of the double-decker cage and the middle and upper adjacent lift cage of the triple group 14.2. Thus, passengers whose destination storey lies in the middle cage zone K1.2 always have available two lift cages of the triple group 14.2 for onward travel.

Whereas the adjacent cage zones K2.2, K3.2 preferably each comprise a respective half of the storeys of a building zone, the middle cage zone K1.2 preferably has two storeys less than the number of storeys allocated to the building zone G2. Accordingly, the middle 0lift cage can serve all middle storeys of the building zone G2 apart from the two boundary Sstoreys. The middle lift cage can, due to the vertical stacking of the lift cages of a triple group 14.2, not travel past the upper or lower adjacent cages which each keep occupied at least one boundary storey of the building zone G2.

In the case of a minimum size of the middle cage zone K1.2 this comprises the two transfer storeys U2.1, U2.2. In this instance the middle lift cage of the triple group 14.2 Stakes over for the building zone G2 the function of an escalator 16, in that it transports the S 10 passengers from the upper transfer storey U2.1 to the lower transfer storey U2.2 and conversely. The two transfer storeys U2.1, U2.2 are then also the sole storeys of the building zone G2 which are each served by two lift cages of the triple group 14.2.

In the maximum extent of the middle cage zone K1.2, thereagainst, the two boundary storeys of the building zone G2 remain the sole storeys which are served only by the adjacent lower or upper lift cage of the triple group 14.2. All other storeys are served, in the maximum extent of the middle cage zone K1.2, by two lift cages.

The arrangement of the cage zones K1.1, K2.1, K3.1, the associated lift units and the transfer storeys U1.1, U1.2 in the building zone G1 substantially corresponds with the arrangement of the said elements of the building zone G2. A more important additional aspect relates to the transfer storeys U1.1, U1.2 of the lower building zone G1.

The two transfer storeys U1.1, U1.2 of the lower building zone G1 are connected by an escalator 16. The escalators are often used in building lobbies. The building lobbies are storeys in which the passengers enter the building and also leave again and are accordingly frequented by numerous passengers. If, for example, the lower transfer storey U1.2 is now a building lobby, the inflowing passengers now pass, in the case of need, rapidly to the upper transfer storey U1.1 thanks to the high conveying perlformance of the roller escalator 16 or pass, when leaving the building, rapidly from this back to the building lobby. Depending on the respective kind and position of the building the building lobby can in principle lie on any storey of the building. The building lobby is in that case usually served by at least one high-speed lift of the second shaft 15.2.

Fig. 6 shows a building with two additional building zones G3, G4 and associated triple Sgroups 14.3, 14.4 together with the cage zones K1.3, K2.3, K3.3, K1.4, K2.4, K3.4 as well as the associated transfer storeys U3.1, U3.2, U4.1, U4.2. As many triple groups 14 as Sdesired can thus be arranged vertically one above the other.

The invention is not restricted only to the illustrated forms of embodiment. With knowledge of the invention it is obvious to the expert to optimise different parameters for specific forms of building. Instead of a double-decker cage it is also possible for several or INO ,I individual single cages or multi-cages, which have more than two cages connected together, to be moved in a second shaft 15.2. In addition, the number of storeys allocated S 10 to a building zone G is freely selectable. The building zones G also do not need to have r the same number of storeys, but the number can vary from building zone to building zone.

It is also not always necessary for only triple groups 14 to be assigned to a building zone G. Thus, quadruple, quintuple or sextuple groups, etc., can also be assigned to the building zones G. The cabin zones do not have to be symmetrically constructed, for example, within a triple group. Depending on the position of the drives and the transfer storeys these cage zones K are freely adaptable to the specific building conditions.

Finally, the transfer storeys U can also be freely arranged with respect to number and position in a building zone G in dependence on cage zones K or number of cages of a multi-cage.

The following simple calculation shows that thanks to the invention a significant increase in conveying performance can be achieved. For a building zone G2 with, for example, ten storeys, according to the state of the art two lift cages each serve nine storeys, i.e. each lift cage has per storey a transport coefficient of 1.9 weighted by the number of storeys to be served, which coefficient represents a measure for the conveying performance of the lift cage in a specific storey. This gives for the two boundary storeys, which are each served only by one lift cage, a transport coefficient each of 1/9 and, for a central region of eight storeys where the two cage zones overlap, a transport coefficient of 2/9.

According to the invention the adjacent cage zones K2.2 and K3.2 each serve five upper and five lower storeys and the middle cage zone K1.2 eight storeys. A transport coefficient of 1/5 plus 1/8, or 13/40, results therefrom for the region of overlapping cage zones, and a transport coefficient of 1/5 for the boundary storeys.

This simple computation example shows that a significantly increased conveying 16 C performance results for all storeys of the building zone G2. The increase in conveying performance for the two boundary storeys is even of over-proportional size. In addition, it Q) can be readily seen that this increase in conveying performance also applies for a number, which is different from 10, of storeys in a building zone.

Claims (32)

1. Lift installation in a building with at least two lifts, wherein the building is divided into building zones (G1, G2; G3, G4) and each lift has at least one lift cage (7a, 7b, 7c), each lift cage (7a, 7b, 7c) is independently movable by way of an own drive (Al, A2, A3) in an associated cage zone (K1, K2, K3; K1.1, K2.1, K3.1, K1.2, K2.2, K3.2) and each cage zone (K1, K2, K3; K1.1, K2.1, K3.1, K1.2, K2.2, K3.2) has at least one transfer storey (U1.1, U1.2, U2.1, U2.2), characterised in that a first lift has at least three lift cages (7a, 7b, 7c) arranged vertically one above the other in a shaft and that at least three cage zones (K1, K2, K3; K1.1, K2.1, K3.1, K1.2, K2.2, K3.2) are allocated to a building zone (G1, G2; G3, G4).

2. Lift installation according to claim 1, characterised in that this at least one lift cage of a second lift is a multi-cage with at least two cages which are arranged vertically one above the other and which are associated with the same cage zone.

3. Lift installation according to claim 2, characterised in that the multi-cage serves at least two transfer storeys (U1.1, U1.2, U2.1, U2.2) disposed one above the other.

4. Lift installation according to any one of claims 1 to 3, characterised in that the at least three lift cages (7a, 7b, 7c) of the first lift have a middle and two adjacent lift cages, wherein the middle lift cage (7a) is independently movable in a middle cage zone (K1) and the two adjacent lift cages (7b, 7c) are independently movable in two adjacent cage zones (K2, K3). Lift installation according to claim 4, characterised in that the middle cage zone (K1) overlaps adjacent cage zones (K2, K3).

6. Lift installation according to claim 4, characterised in that the at least three drives (Al, A2, A3) associated with the lift cages (7a, 7b, 7c) can be moved past by the lift cages (7a, 7b, 7c).

7. Lift installation according to claim 4 or 6, characterised in that the at least three drives (Al, A2, A3) associated with the lift cages (7a, 7b, 7c) are positioned at a first shaft wall or a second opposite shaft wall. o 8. Lift installation according to claim 7, characterised in that the drive (Al) of the Smiddle lift cage (7a) is positioned at the first shaft wall and the two drives (A2, A3) of the adjacent lift cages (7a, 7c) are positioned at the opposite second shaft wall.

9. Lift installation according to claim 7 or 8, characterised in that the at least three I' drives (al, a2, a3) are positioned in alternation on opposite first or second shaft walls. IND

10. Lift installation according to any one of claims 4 and 6 to 8, characterised in that S 10 the at least three drives (Al, A2, A3) are positioned at different shaft heights.

11. Lift installation according to claim 10, characterised in that the drives (A2, A3) of the adjacent lift cages (7b, 7c) are arranged above or below the drive (Al) of the middle lift cage (7a).

12. Lift installation according to claim 10 or 11, characterised in that the distance in vertical direction between the two drives (Al) of a middle and an adjacent lift cage (A2, A3) is at least one cage height.

13. Lift installation according to any one of claims 4 and 6 to 8, characterised in that two drives (Al, A3) are positioned at the same shaft height.

14. Lift installation according to any one of the preceding claims, characterised in that the drive (Al, A2, A3) has at least one motor (M1, M2, M3) and drive pulley (la, 1 b, ic). Lift installation according to claim 14, characterised in that the motor (M1, M2, M3) is arranged vertically above the associated drive pulley (la, ib, ic).

16. Lift installation according to claim 14 or 15, characterised in that the axes of the drive pulleys (la, 1 b, ic) lie parallel to the first and the second shaft wall.

17. Lift installation according to any one of the preceding claims, characterised in that a counterweight (12a, 12b, 12c) is associated with each lift cage (7a, 7b, 7c).

18. Lift installation according to claim 17, characterised in that each counterweight C (12a, 12b, 12c) is guided by two counterweight guide rails (11a.1, 11a.2, 11b.1, 11b.2).

19. Lift installation according to claim 17 or 18, characterised in that each lift cage (7a, 7b, 7c) is movable along two cage guide rails (10.1, 10.2). Lift installation according to claim 18 or 19, characterised in that the counterweights (12a, 12b, 12c) are positionable between the cage guide rails (10.1, 10.2) and first or second shaft walls. O 10 21. Lift installation according to any one of claims 17 to 20, characterised in that at (N least one tension means (Z1, Z2, Z3) is associated with each lift cage (7a, 7b, 7c).

22. Lift installation according to claim 21, characterised in that the lift cage (7a, 7b, 7c) and the associated counterweight (12a, 12b, 12c) are suspended at a common tension means (Z1, Z2, Z3).

23. Lift installation according to claim 21 or 22, characterised in that the tension means (Z1, Z2, Z3) are disposed in operative contact with the drive pulley (la, 1b, 1c).

24. Lift installation according to any one of claims 21 to 23, characterised in that the lift cages (7a, 7b, 7c) are suspended at the tension means (Z1, Z2, Z3) in block-and-tackle manner. Lift installation according to claim 24, characterised in that the lift cages (7a, 7b, 7c) each have at least one first and second deflecting roller (2a, 2b, 2c, 3a, 3b, 3c) mounted in the lower region of the lift cages (7a, 7b, 7c).

26. Lift installation according to claim 25, characterised in that the tension means (Z1, Z2, Z3) are guided by the drive pulleys (la, 1b, 1c) and the first and second deflecting rollers (2a, 2b, 2c, 3a, 3b, 3c) to first fixing points (5a, 5b,

27. Lift installation according to any one of claims 21 to 26, characterised in that the counterweights (12a, 12b, 12c) are suspended below the associated drives (Al, A2, A3) in block-and-tackle manner at the tension means (Z1, Z2, Z3).

28. Lift installation according to claim 27, characterised in that the counterweights (12a, 12b, 12c) have third deflecting rollers (4a, 4b, 4c) fixed in the upper region of the Scounterweights (12a, 12b, 12c).

29. Lift installation according to claim 28, characterised in that the tension means (Z1, Z2, Z3) are guided by the drive pulleys (la, ib, 1c) via the third deflecting rollers (4a, 4b, 4c) to second fixing points (6a, 6b, 6c).

30. Lift installation according to any one of claims 21 to 29, characterised in that the S 10 tension means (Z1, Z2, Z3) consist of at least one cable or double cable.

31. Lift installation according to any one of claims 21 to 29, characterised in that the tension means (Z1, Z2, Z3) consist of at least one belt.

32. Lift installation according to claim 30 or 31, characterised in that the supporting structure of the tension means (Z1, Z2, Z3) is formed from aramide fibres or Vectran fibres.

33. Lift installation according to claim 31, characterised in that the belts are structured at one side.

34. Lift installation according to claim 31 or 33, characterised in that the belts are cogged belts or wedge-ribbed belts.

35. Lift installation according to claim 33 or 34 in combination with claims 25 and 28, characterised in that the belts are guided by the drive pulleys (la, Ib, ic) and at least first deflecting rollers (2a, 2b, 2c), second deflecting rollers (3a, 3b, 3c) and third deflecting rollers (4a, 4b, 4c), only one side of the belts is disposed in contact with the drive pulleys (la, Ib, Ic) and deflecting rollers (2a, 2b, 2c, 3a, 3b, 3c, 4a, 4b, 4c) and the belts are turned through 1800 about the respective longitudinal axis thereof between the drive pulleys (la, Ib, ic) and the first deflecting rollers (2a, 2b, 2c).

36. Lift installation according to claim 19 in combination with claim 25, characterised in that the cage guide rails (10.1, 10.2) form a connecting plane and the tension means (Z1, Z2, Z3), the drive pulleys (1a, 1b, ic) and the first and second deflecting rollers (2a, S2b, 2c, 3a, 3b, 3c) of the associated lift cage (7a, 7b, 7c) are arranged at one side of the connecting plane C)

37. Lift installation according to claim 19 in combination with claim 25, characterised in that the lift cages (7a, 7b, 7c) are guided by two cage guide rails (10.1, 10.2), wherein these cage guide rails (10.1, 10.2) form a connecting plane and the tension means (Z1, Z2, Z3), the drive pulleys (la, Ib, Ic) and the first and second associated deflecting ,rollers (2a, 2b, 2c, 3a, 3b, 3c) of the associated lift cage (7a, 7b, 7c) are arranged at both Ssides of the connecting plane (N 38. Lift installation according to one of the preceding claims, characterised in that each drive (Al, A2, A3) is fixed on a crossbeam (19).

39. Lift installation according to claim 38 in combination with claims; 18 and 19, characterised in that the crossbeam (19) is fastened to the cage guide rails (10.1) and/or to the counterweight guide rails (1 a.1, 1 a.2).