EP1918238B1 - Elevator with two superimposed cars in one shaft - Google Patents

Description

The invention relates to an elevator with at least two elevator cars located one above the other, which are vertically movable in a shaft. This invention is defined in the preamble of the independent claim.

An elevator consists of at least one elevator car, which can be moved vertically in a shaft and picks up passengers to drive them to a desired floor of a building. In order to perform this task, the elevator usually has at least the following elevator components: a drive, deflection rollers, tension elements, a counterweight, as well as a pair of rails for guiding an elevator car and a counterweight.

The drive generates the power required for the transport of the passengers present in the elevator car. As a rule, an electric motor performs this function. This drives directly or indirectly to a traction sheave, which is in frictional contact with a tension element. The tension member may be a belt or a rope. It is used for suspension and the promotion of the elevator car and the counterweight, which are both suspended so that their gravity act in the opposite direction along the tension element. Accordingly, the resulting gravity, which must be overcome by the drive significantly reduced. In addition, a larger drive torque can be transmitted from the drive pulley to the tension element by the larger Aufliegekraft of the tension element on the traction sheave. The tension element is guided by deflection rollers.

In elevator construction, the optimum utilization of the shaft volume is becoming increasingly important. Especially in high-rise buildings with a high degree of utilization of the building, it is desirable to manage the passenger volume as efficiently as possible for a given shaft volume. This goal can be achieved, first, by an optimal space-saving arrangement of the elevator components, which creates space for larger elevator cars, and secondly by elevator concepts, which allows the vertical movement of several independent elevator cars in a shaft.

EP 1 329 412 describes an elevator with an upper cabin and a lower cabin, which are moved in the same shaft. A drive for the upper cabin and a drive for the lower cabin are arranged horizontally in a shaft head, so that rotation axis of drive rollers are vertically aligned. The upper and the lower cabin are connected by means of suspension with a counterweight.

WO 2006/065241 describes a lift with several cabins in the same bay. The cabins are connected by suspension with counterweights. In this case, a suspension and lengths of the support means can be chosen so that the counterweights collide before the cabs can collide.

Out EP 1 489 033 is an elevator with at least two elevator cars located one above the other in the same shaft known. Each elevator car has its own drive and its own counterweight. The drives are arranged close to first and second shaft walls and also the counterweights are each suspended below the associated drive to drive or tethers close to first or second shaft walls. The axles of the traction sheaves the drives are perpendicular to the first and second shaft walls. The two independently movable lift cabins ensure a high flow rate. The positioning of the drives in the shaft near the first or second walls eliminates the need for a separate machine room and allows a space-saving compact arrangement of the drive elements in the shaft head.

The object of the present invention is to further improve the arrangement of elevator components for the vertical movement of several elevator cars in an elevator shaft.

The above-mentioned object is achieved by the invention according to the definition of the independent patent claim.

The elevator according to the invention has at least two elevator cars located one above the other in a shaft which can be moved vertically and which each have their own drive, their own counterweight and their own traction means, these drives being fixed in the area of the shaft head in such a way as to drive a first shaft wall and another drive is fixed to an opposite second shaft wall, and each have at least one traction sheave. At least one first deflection roller is assigned to a drive and is positioned on a second or first shaft wall opposite this drive above the counterweight assigned to this drive. The traction means is guided by the counterweight on the pulley to the traction sheave and from there to the elevator car. Advantageously, both drives are each assigned a first deflection roller.

The advantage of the elevator according to the invention lies in the space-saving arrangement of the drives in the shaft head near the first and second shaft walls. In addition, the traction means is performed at the page change in the shaft head above the elevator car from the first side of the shaft to the second side of the shaft between the drive and the first guide pulley in a space not used elsewhere space. Finally, the counterweight can be easily hung below the first pulley.

Advantageously, a traction means is guided by the drive pulley and the first pulley over the elevator car so that the traction means forms an acute angle with third and fourth shaft walls. This Angle is usually not greater than 20 °. Advantageously, the elevator car is guided by car guide rails and the counterweight can be positioned between car guide rails and third and fourth shaft walls.

The advantage of this embodiment of the invention lies in the space-saving arrangement of the counterweights in the shaft between the car guide rails and third and fourth shaft walls.

Advantageously, at least one elevator car is suspended as a bottle. The elevator car is suspended as a bottle on second and third pulleys. The traction means is guided between the drive pulley and a first fixed point via second and third deflection rollers. Usually, the elevator car is suspended as a top or bottom bottle. The traction means is guided, for example, as a bottom block of the traction sheave on the side of the elevator car down to the second deflection roller. From the second deflection roller then the traction means is guided under the elevator car to the third deflection roller and from there further laterally to the elevator car up to a first fixed point of the traction means. Analogously, the arrangement of the second and third deflection roller in the case of a top bottle with appropriate guidance of the traction means. The traction means is guided by the traction sheave along first or second shaft walls to the second deflection roller. From there, the traction means above the elevator car to the third guide roller and finally guided along second or first shaft walls to the first fixed point.

The advantage of this embodiment of the invention is that thanks to the suspension of the elevator car as a bottle for the Operation of the elevator smaller traction torques are sufficient and accordingly smaller and more economical drives can be used. Another advantage lies in the space-saving side change of the traction device between the first and second shaft walls of the drive pulley to the first fixed point via a second and third pulley in a different unused space laterally and below the elevator car.

Advantageously, the elevator has fourth pulleys on which the counterweight is suspended as a bottle. The traction means is guided from the first guide roller down to the fourth guide roller and from there back up to a second fixed point of the traction means.

The advantage of this embodiment of the invention is that thanks to the suspension of the counterweight as a bottle for the operation of the elevator smaller traction moments are sufficient and accordingly smaller and more economical drives can be used.

Advantageously, the fixed points associated with a traction means lie on the same side of the associated elevator car.

The advantage of this embodiment of the invention lies in the easier assembly of the fixed points of the traction means. Alone the physical proximity of the two fixed points of the traction device make it easier for the fitter to assemble them. In addition, thanks to the integration of the two fixed points in a component, the number of individual parts of the elevator can be reduced.

Advantageously, the traction means is a belt which is guided by the drive pulley and at least first, second, third and fourth pulleys, only one side of the belt is in contact with the drive pulley and pulleys and that the belt between the drive pulley, the pulleys and its fixed points is guided essentially torsion-free.

The advantage of this design is the ease of use of belts with one-sided structured surface such as ribs, teeth or wedges. Since the leadership of the traction device is largely torsion-free, the same direction guiding the belt through the traction sheave and the pulleys is possible. As a result, unilateral engagement of the structuring in the traction sheaves and the deflection rollers without rotation of the belt about its longitudinal axis is possible. The belt has two dimensions transverse to the pulling direction, a first dimension with a relatively wide extension and a second dimension with a relatively thin extension. This means that the belt transversely to its pulling direction in its first dimension takes up much more space in the elevator shaft than in its second dimension. With torsion-free, equidirectional guidance of the belt, the belt takes up minimal space in the shaft space, since the first wide dimension of the belt is parallel to first or second shaft walls and only the short second dimension in the shaft space is perpendicular to first or second shaft walls. Therefore, this arrangement of the elevator with a torsion-free guidance of the belt is particularly space-saving. In addition, the belts are subjected to a largely torsion-free guidance smaller frictional forces and shear forces and have a longer lifetime. The elevator is thus also maintenance friendly.

Advantageously, the drives are in the region of the shaft head. In this case, the drives are mounted at different levels, so that the leadership of the traction means above the elevator car between a traction sheave and an associated first pulley is carried out without conflict. A first drive and its associated first pulley are thereby at a first level and a second drive and its associated first pulley are fixed at a second level which is above or below the first level. Accordingly, the traction means of a first and second elevator car are guided at two different levels.

The advantage of this embodiment of the invention lies in the space-saving arrangement of the drives and associated first pulleys. In addition, a conflict-free, i. ensures contact-free guidance of the traction means above the elevator car.

Advantageously, the drives are in the region of the shaft head, wherein the drives are mounted at the same level.

The advantage of this embodiment of the invention lies in the space-saving arrangement of the drives and associated first pulleys side by side in the shaft head, whereby a minimum shaft head height is installed. In addition, a conflict-free, ie non-contact guidance of the traction means is ensured above the elevator car.

Advantageously, first and second drives are fixed on a common carrier. Alternatively, the drives are fixed on a support.

The advantage of this embodiment of the invention can be found in the simple, flexible and space-saving arrangement of the drives in the shaft head.

Advantageously, the elevator has landing doors and car doors, wherein the shaft doors consist of two sliding elements and the car doors consist of more than two sliding elements.

The advantage of this embodiment of the invention is that sufficient space is provided to position the counterweight of an elevator car in the vicinity of first or second shaft walls between the guide rails of the elevator car and third or fourth shaft walls.

The interaction of the above-described elements of the invention, the positioning of the at least two drives, the deflection rollers and the counterweights and the resulting largely torsion-free guidance of the traction means, in particular in belts, results in a compact, space-saving and yet very flexible arrangement of the elevator components in the elevator shaft.

Fig.1

Seitenansicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, zwei Antrieben, zwei Treibscheiben, zwei Zugmittel und mehreren Umlenkrollen;

Fig.2

Draufsicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, zwei Antrieben, zwei Treibscheiben, zwei Zugmittel und mehreren Umlenkrollen;

Fig.3

Schematische Draufsicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, zwei Antrieben, die vor den Kabinenführungsschienen positioniert sind, zwei Treibscheiben, zwei Zugmittel, mehreren Umlenkrollen, zwei Gegengewichten, zwei Gegengewichtsführungsschienen, einer vierteiligen Kabinentüre und einer schachtseitigen Türe;

Fig.4

Schematische Draufsicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, zwei Antrieben, die je vor und hinter den Kabinenführungsschienen positioniert sind, zwei Treibscheiben, zwei Zugmittel, mehreren Umlenkrollen, zwei Gegengewichten, zwei Gegengewichtsführungsschienen, einer vierteiligen Kabinentüre und einer schachtseitigen Türe;

Fig.5

Schematische Seitenansicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, die jeweils als Unterflasche oder Oberfalsche aufgehängt sind, zwei Antrieben, zwei Treibscheiben, zwei Zugmittel, mehreren Umlenkrollen, zwei Gegengewichten und zwei Gegengewichtsführungsschienen;

Fig.6

Schematische Seitenansicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, die jeweils als Oberflasche aufgehängt sind, zwei Antrieben, zwei Treibscheiben, zwei Zugmittel, mehreren Umlenkrollen, zwei Gegengewichten und zwei Gegengewichtsführungsschienen;

Fig.7

Schematische Seitenansicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, die obere 1:1 und die untere als Unterflasche aufgehängt, zwei Antrieben, zwei Treibscheiben, zwei Zugmittel, mehreren Umlenkrollen, zwei Gegengewichten und zwei Gegengewichtsführungsschienen; und

Fig.8

Schematische Seitenansicht einer erfindungsgemässen Anordnung eines Aufzugs mit zwei Aufzugskabinen, die obere 1:1 und die untere als Oberflasche aufgehängt, zwei Antrieben, zwei Antriebsscheiben, zwei Zugmittel, mehreren Umlenkrollen, zwei Gegengewichten und zwei Gegengewichtsführungsschienen;

In the following, the invention will be clarified by exemplary embodiments and drawings and further described in detail. Show it:

Fig.1

Side view of an inventive arrangement of an elevator with two elevator cars, two Drives, two traction sheaves, two traction means and several pulleys;

Fig.2

Top view of an inventive arrangement of an elevator with two elevator cars, two drives, two traction sheaves, two traction means and a plurality of pulleys;

Figure 3

Schematic plan view of an inventive arrangement of an elevator with two elevator cars, two drives, which are positioned in front of the car guide rails, two traction sheaves, two traction means, a plurality of pulleys, two counterweights, two counterweight guide rails, a four-part car door and a shaft-side door;

Figure 4

Schematic plan view of an inventive arrangement of an elevator with two elevator cars, two drives, each positioned in front of and behind the car guide rails, two traction sheaves, two traction means, a plurality of pulleys, two counterweights, two counterweight guide rails, a four-part car door and a shaft-side door;

Figure 5

Schematic side view of an inventive arrangement of an elevator with two elevator cars, which are suspended in each case as bottom block or top wrong, two drives, two traction sheaves, two traction means, a plurality of pulleys, two counterweights and two counterweight guide rails;

Figure 6

Schematic side view of an inventive arrangement of an elevator with two elevator cars, which are each suspended as a top bottle, two drives, two traction sheaves, two traction means, a plurality of pulleys, two counterweights and two counterweight guide rails;

Figure 7

Schematic side view of an inventive arrangement of an elevator with two elevator cars, the upper 1: 1 and the lower suspended as a bottom block, two drives, two traction sheaves, two traction means, a plurality of pulleys, two counterweights and two counterweight guide rails; and

Figure 8

Schematic side view of an inventive arrangement of an elevator with two elevator cars, the upper 1: 1 and the lower suspended as a top bottle, two drives, two drive pulleys, two traction means, a plurality of pulleys, two counterweights and two counterweight guide rails;

FIGS. 1 and 2 show an elevator for at least two elevator cars, each having its own drive A1, A2 and are movable independently of each other in the vertical direction. The drives A1, A2 are positioned in the shaft head above the elevator cars in the vicinity of first and second shaft walls. The first and second shaft walls are those shaft walls opposite each other which have no shaft door. Here are the drives A1, A2 at two different levels, so that the two traction means Z1, Z2, where the Elevator cabs A1, A2 suspended are conflict-free and without mutual contact are feasible.

With knowledge of the invention opens up for the expert numerous possibilities to fix the drives A1, A2 in the shaft. The person skilled in the art can also arrange the two drives A1, A2 at the same level. This variant is not shown purely for reasons of space, since a side view of the then successive drives A1, A2 is limited meaningful. However, the top view shows the FIG. 4 an arrangement of the drives A1, A2, which not only allows the already mentioned fixing of the drives A1, A2 at different levels, but also a fixation of the drives at the same level. This arrangement is particularly advantageous if the space in the shaft head are particularly narrow. In addition, a kofliktfreie guidance of the traction means Z1, Z2 is guaranteed in this variant.

Advantageously, the drives A1, A2 are each mounted on a support whereby extensive freedom in the orientation of the drives A1, A2 are given. In a further advantageous variant, the drives A1, A2 are mounted on the same carrier, an upper drive A1 on the upper side of the carrier and a lower drive A2 on the underside of the carrier. This arrangement of the drives A1, A2 is very compact and has the advantage of minimizing space in the shaft head.

The drive A1, A2 forms together with a traction sheave 1a, 1b for driving the traction means Z1, Z2 a drive module. The traction sheave 1a, 1b is designed so that it is suitable for receiving one or more traction means Z1, Z2. The traction means Z1, Z2 are preferably belts such as V-ribbed belts with unilateral ribs which engage in one or more pulley-side recesses. Belt variants such as smooth belts and belts toothed on one or both sides with corresponding drive pulleys 2a, 2b are also usable. In addition, various types of ropes such as single ropes, double ropes or multiple ropes can be used. The traction means have strands of steel wire gzw. Aramid fiber on.

The traction means Z1, Z2 in the FIG. 1 is configured as a pulley, wherein both at least one elevator car and at least one counterweight is suspended as a bottle. The traction means Z1, Z2 is guided from a first fixed point 13a, 13b to a second fixed point 14a, 14b such that it is deflected by a plurality of deflection rollers 2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b and the traction sheave 1a, 1b in FIG Essentially torsion-free is performed.

The traction means Z1, Z2 is thereby guided from a first fixed point 13a, 13b to the first deflecting roller 2a, 2b such that the respective counterweight assigned to an elevator car is suspended on the rollers 3a, 3b as a bottle. The traction means Z1, Z2 thus extends from the first fixed point 13a, 13b along a first or second shaft wall down to the roller 3a, 3b, wraps it from inside to outside at an angle of approximately 180 ° and again leads upwards along a first or second shaft wall to the first deflection roller 2a, 2b. This first deflection roller 2a, 2b lies opposite the associated traction sheave 1a, 1b in the vicinity of second or first shaft walls. In the present embodiment, the first deflection roller 2a, 2b part of a deflection, which is connected via rigid bar-shaped rods with the drive module and with this one Assembly forms. The advantage of this embodiment is the reduction in the number of components and the associated ease of assembly. In addition, the drive and deflection modules can be moved along the connecting rods, so that a flexible length adjustment of the assembly to the real dimensions of the shaft is possible. Another advantage is the modular design of the assembly which allows for convenient maintenance or replacement thereof.

From the first deflection roller 2a, 2b, the traction means Z1, Z2 is now guided to the traction sheave 1a, 1b along the shaft ceiling and wraps around this traction sheave 1a, 1b from inside to outside in a wrap angle of 90 to 180 °. In the further course, the traction means Z1, Z2 generated below the traction sheave 1a, 1b with second 4a, 4b and third 5a, 5b pulleys bottle suspension of the elevator car by the traction means Z1, Z2 down from the traction sheave 1a, 1b along first or second shaft walls second deflection rollers 4a, 4b is guided. The traction means Z1, Z2 wraps around the deflection roller 4a, 4b from outside to inside in a wrap angle of about 90 ° and then leads horizontally to the third deflection roller 5a, 5b. Finally, the traction means Z1, Z2, after looping around the third deflection roller 5a, 5b, pass from inside to outside at a wrap angle of approximately 90 ° along first or second shaft walls up to the second fixing point 14a, 14b.

A shim 6a, 6b is optional part of the drive module. With this shim 6a, 6b, the wrap angle of the traction means on the traction sheave 1a, 1b can be adjusted, or enlarged or reduced by the desired traction forces of the traction sheave 1a, 1b to the traction means A1, A2 to transfer.

From the FIGS. 2 to 4 it can be seen that the two axes formed by the drives A1, A2 and the deflection rollers 2a, 2b are at an acute angle to third and fourth shaft walls. The third and fourth shaft walls are those walls opposite each other in the shaft which have at least one shaft door 8. This ensures that the associated counterweights 12a, 12b, which are suspended as a bottle at the first fixed point 13a, 13b and the first deflection roller 2a, 2b, are positioned between the car guide rails 10 of the elevator cars 7a, 7b and third and fourth shaft walls. The advantage of such an arrangement of the drive A1, A2 and the deflection roller 2a, 2b lies in the space-saving and easy positioning of the counterweights 12a, 12b. The counterweights 12a, 12b are guided by counterweight guide rails 11a, 11b.

In addition, the axis formed by the two deflection rollers 5a, 5b and 4a, 4b, on which the elevator car 7a, 7b is suspended, close to the car guide rails 10. As a result, moments caused by the suspension forces of the traction means Z1, Z2 on the elevator car 7a, 7b are transmitted to the car guide rails 10, kept small.

FIGS. 3 and 4 show two variants of the previously described embodiment of the invention. In this case, the suspension axles, formed by the deflection rollers 4a, 4b and 5a, 5b, on which the elevator car 7a, 7b is suspended, either both in front of the car guide rails 10 or one each before or behind the car guide rails 10. The A person skilled in the art may prefer one or the other solution depending on the space conditions in the shaft, the first-mentioned symmetrical suspension being advantageous with respect to the torque exerted by the elevator car 7a, 7b on the car guide rail 10. The distance from the suspension axis of the elevator car 7a, 7b to the car guide rails 10 is kept minimal, thus reducing the moment, moreover, the two opposing moments partially or completely cancel each other out. With knowledge of the above teachings the skilled person further variants not shown are available, such as the location of the two suspension axes behind the car guide rails.

The space-saving positioning of at least one counterweight 12a, 12b between the car guide rails 10 and a third or fourth shaft wall can be realized thanks to a special arrangement of the car door 9. In normal operation of the elevator, the elevator cars 7a, 7b are placed flush with the floor at a floor stop and the car doors 9 are opened together with the landing doors 8 to allow the transfer of passengers from the floor to the elevator car 7a, 7b. When the car doors 9 open, its sliding elements protrude into the shaft space and occupy a certain otherwise unobstructed shaft space. If the car door 9 does not consist of two sliding elements as usual, but of at least four sliding elements, which are telescopically on or extendable, less shaft space is claimed during the opening process of the car doors 9. Thanks to the shorter sliding elements, these sliding elements protrude less far into the shaft space when the car door 9 is open, thus keeping more space free for the counterweights 12a, 12b or other items in the shaft, such as electrical installation, sensors, safety device or electrical box.

According to the invention, various options are available to the person skilled in the art in order to suspend the elevator cars 7a, 7b. Depending on the available space in the shaft head, shaft pit or between floors, a suspension variant is optimal.

FIGS. 5 and 6 show an arrangement with two hung as a bottle elevator cars 7a, 7b. In FIG. 5 the upper elevator car 7a is suspended as a top bottle and elevator car 7b as a bottom bottle. This suspension variant is particularly advantageous when a minimal approach between the elevator cars is desired, for example, when the floor distances are small. According to FIG. 6 Both elevator cars 7a, 7b are suspended as top bottles. This variant is advantageous if the space conditions in the pit are narrow. In addition, in both examples, the upper elevator car 7a with upper bottle can not be pressed by the traction means Z1, Z2 into the shaft head.

The FIGS. 7 and 8 show a suspension with a 1: 1 suspension of the upper elevator car 7a. The lower elevator car 7b is suspended according to the invention as a bottle. Depending on the space available in the elevator shaft, the lower elevator car 7b can be suspended as an upper or lower bottle.

Claims (20)

1. Lift with at least two lift cages (7a, 7b) which are disposed one above the other, in a shaft, which cages are vertically movable and each have an own drive (A1, A2), each an own counterweight (12a, 12b) and each an own traction means (Z1, Z2), wherein these drives (A1, A2) are fixed in the region of the shaft head in such a manner that one drive (A1) is fixed at a first shaft wall and a further drive (A2) is fixed an opposite second shaft wall and each have at least one drive pulley (1a, 1b), wherein at least one first deflecting roller (2a, 2b) is associated with one drive (A1, A2) and is positioned on a second or first shaft wall, which is opposite this drive (A1, A2), above the counterweight (12a, 12b) associated with this drive (A1, A2), and that the traction means (Z1, Z2) is led from the counterweight (12a, 12b) over the deflecting roller (2a, 2b) to the drive pulley (1a, 1b) and from there to the lift cage (7a, 7b), characterised in that associated fixing points (13a, 13, 14a, 14b) of a traction means (Z1, Z2) lie on the same side of the lift cage (7a, 7b).
2. Lift according to claim 1, characterised in that a respective first deflecting roller (2a, 2b) is associated with each of the two drives (A1, A2).
3. Lift according to any one of the preceding claims, characterised in that at least one traction means (Z1, Z2) is so guided by the drive pulley (1a, 1b) and the first deflecting roller (2a, 2b) above the lift cage (7a, 7b) that the traction means (Z1, Z2) forms an acute angle with third and fourth shaft walls.
4. Lift according to claim 3, characterised in that the angle is at most 20°.
5. Lift according to any one of the preceding claims, characterised in that the lift cage (7a, 7b) is guided by cage guide rails (10) and that the counterweight (12a, 12b) is positionable between cage guide rails (10) and third and fourth shaft walls.
6. Lift according to any one of the preceding claims, characterised in that a first lift cage (7a, 7b) is suspended in block-and-tackle manner.
7. Lift according to claim 6, characterised in that the lift cage (7a, 7b) is suspended in block-and-tackle manner at second deflecting rollers (4a, 4b) and third deflecting rollers (5a, 5b) and that the traction means (Z1, Z2) is led between the drive pulley (1a, 1b) and a first fixing point (13a, 13b) via second deflecting rollers (4a, 4b) and third deflecting rollers (5a, 5b).
8. Lift according to any one of the preceding claims, characterised in that the counterweight (10) is suspended in block-and-tackle manner at a fourth deflecting roller (3a, 3b), wherein the traction means (Z1, Z2) is led from the first deflecting roller (2a, 2b) downwardly to the fourth deflecting roller (3a, 3b) and from there back up to a second fixing point (14a, 14b) of the traction means (Z1, Z2).
9. Lift according to any one of the preceding claims, characterised in that the traction means (Z1, Z2) consist of at least one cable or double cable.
10. Lift according to any one of claims 1 to 8, characterised in that the traction means (Z1, Z2) is a belt.
11. Lift according to claim 10, characterised in that the traction means (Z1, Z2) is a belt structured at one side.
12. Lift according to claim 10 or 11, characterised in that the traction means (Z1, Z2) is a cogged belt, ribbed belt or V-belt.
13. Lift according to any one of the preceding claims, characterised in that the belt is guided by the drive pulley (1a, 1b) and at least first deflecting rollers (2a, 2b), second deflecting rollers (4a, 4b), third deflecting rollers (5a, 5b) and fourth deflecting rollers (3a, 3b), and is disposed in contact with the drive pulley (1a, 1b) and deflecting rollers (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b) only at one side of the belt and that the belt is guided between the drive pulley (1a, 1b), the deflecting rollers (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b) and its fixing points (13a, 13b, 14a, 14b) to be substantially free of twisting.
14. Lift according to any one of the preceding claims, characterised in that the drives (A1, A2) are disposed in the region of the shaft head, wherein the drives (A1, A2) are fastened at different levels.
15. Lift according to any one of the preceding claims, characterised in that the drives (A1, A2) are located in the region of the shaft head, wherein the drives (A1, A2) are fastened at the same level.
16. Lift according to any one of the preceding claims, characterised in that the drives (A1, A2) are positioned on the same beam.
17. Lift according to any one of the preceding claims, characterised in that the drives (A1, A2) are each positioned on a respective beam.
18. Lift according to any one of the preceding claims, characterised in that the lift has shaft doors (8) and a cage door (9), wherein the shaft doors (8) consist of two sliding elements and the cage door (9) consists of more than two sliding elements.
19. Lift according to any one of the preceding claims, characterised in that the lift cages (7a, 7b) are guided by cage guide rails (10), wherein the two drive modules and the two associated deflecting modules each lie on a respective side of the connecting line of the cage guide rails (10).
20. Lift according to any one of the preceding claims, characterised in that the lift cages (7a, 7b) are guided by cage guide rails (10), wherein the two drive modules and the two associated deflecting modules each lie on the same side of the connecting line of the cage guide rails (10).

Images