EP2370336A1

EP2370336A1 - Eccentrically suspended elevator cabin

Info

Publication number: EP2370336A1
Application number: EP09796371A
Authority: EP
Inventors: Ernst Ach
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2008-12-26
Filing date: 2009-12-17
Publication date: 2011-10-05
Anticipated expiration: 2029-12-17
Also published as: PT2370336E; ES2441867T3; US20110272215A1; WO2010072643A1; CN102264624B; US20140246274A1; CN102264624A; EP2370336B1

Abstract

The invention relates to an elevator system (100) comprising at least one elevator cabin (2) and at least one counterweight (4) which are both able to be displaced in opposing directions along at least one guide track (7) in an elevator shaft (1) by way of a supporting and driving means (3) that is guided by a drive pulley (5) of a drive (6), wherein the supporting and driving means (3) is fastened directly onto the elevator cabin (2) eccentrically with respect to a center of gravity (S) of the elevator cabin (2) so that a tilting or load moment (M) results thereby, wherein the tilting or load moment (M) can be compensated by a compensation device (200).

Description

Eccentrically suspended elevator car

The present invention relates to an elevator installation in which at least one elevator car is not suspended centrally above its center of gravity, but rather eccentrically or eccentrically on a suspension element. This generally means that the one or more attachment points of the elevator car with the force application point of the holding or driving force for the elevator car does not match, as is the case for example in a so-called backpack suspension.

An elevator installation usually comprises an elevator cage and at least one counterweight, which are moved in opposite directions in an elevator shaft. The elevator car and the at least one counterweight run here in or along guide rails.

The designed as a T-profile guide rails take in principle in this type of eccentric suspension, the inclusion of a tilting moment, which is at an upper guide shoe of the elevator car or at the relevant point of the guide rail in a tensile force and at a lower guide shoe of the elevator car or at the relevant point of the guide rail in a compressive force. To the tilting moment of the elevator car itself adds in each case

Last moment generated, for example, by persons being transported.

Accordingly, eccentrically suspended elevator cars require on the one hand correspondingly sturdy molded guide rails and on the other hand guides that withstand the forces occurring. However, this fact represents a constructive additional expense or disadvantage, so that solutions are sought for this purpose. The patent CH 517 043 discloses a solution for an elevator car, in which a hydraulic thrust piston drive is arranged laterally in the elevator shaft outside the movement space of the elevator car. By means of a wrapping body, that is to say rope, which is guided by rollers arranged in mirror-inverted manner, a cradle with a joint is realized, which thus permits a starting of the driving force varying from the direction. This patent thus discloses an improved transmission of lying outside the range of motion of the elevator car

Kraftansatzpunktes to another force starting point, which lies within the movement space of the elevator car below the center of gravity of the elevator car. This ensures that additional, laterally acting stresses on the guide rails or in the guides are at least partially eliminated, that is tilting of the elevator car in the opposite diagonally arranged guide rails is avoided in the upward push operation. This patent specification thus does not describe dis- or eccentric suspension of the elevator car and no possibility of eliminating a tilting or load torque caused by the eccentric suspension.

From the published patent application WO 2008/012592 A, an elevator installation is known which uses so-called runners to support an elevator car with respect to the shaft walls. As a runner either roles are used, which roll along the shaft walls, or there are gliders are used, which slide along the shaft walls.

The object of the present invention is a

To find compensation device for the compensation of the occurring tilting and load moments in an eccentrically suspended elevator car. The solution of the problem consists in the design, arrangement and design of a compensation device which provides a wrap around rollers on the elevator car with at least one second support means.

The wrapping of at least two rollers arranged on the elevator car according to the invention is carried out in opposite directions, in such a way that the looping generated by at least one second support means torsion, which acts against the tilting or load moment of the elevator car. Such a torsion arises from the fact that the at least one second suspension element - hereinafter referred to as compensation means - is guided around a first roller offset from a center axis or centroid line of the elevator car to the guide rails on the elevator car at the top and around a second, from the Center axis or centroid of the elevator car offset in the opposite direction role in opposite directions, ie guided around the bottom. This results in force components that counteract the pressure occurring at the bottom of the elevator car and against the train that occurs at the top of the elevator car.

In principle, a compensation of this compressive and tensile force can be achieved not only by means of opposing rollers and a support means, but also by pulling or pressing mechanical devices that run along, for example on other guide rails with the elevator car. Accordingly, the term compensating means should also include such solutions in the following.

Generally corresponds to an elevator installation with an eccentrically suspended elevator car, for example in the form of a so-called backpack suspension, the following basic structure: The elevator car runs along mostly two guide rails, which are arranged on one of the four sides of the elevator shaft. On the same side are usually also the drive and the Counterweight arranged. The driving, first carrying and blowing agent is in this case preferably attached as close as possible to the guide rails directly to the elevator car.

According to a basic variant of the invention, the second support means, which may have a round, wedge-shaped or flat cross-section, made of the materials or material compositions commonly used in this field. In particular, belts with a steel tensile carrier or a gall chain are considered because they have a low elongation and a permanent elongation. The supporting or better said compensating means is firmly attached at one end, for example, to a first, lower attachment point which is as deep as possible in the elevator shaft and as far as possible from the guide rails as far as possible. From this first, lower attachment point away, the compensation means wraps around a first roller, which is arranged on the lower edge of the elevator car, preferably horizontally as close as possible to the guide rails. From this first roll, the compensating means wraps around a second roll in opposite directions. This second roller is preferably arranged at the upper edge of the elevator car and preferably horizontally as far as possible away from the guide rails. From this second roller, the compensating means leads to a second, upper attachment point, which is preferably as high as possible in the elevator shaft and preferably horizontally as close as possible to the guide rails.

This basic variant of a compensating means arrangement optimally ensures possible leverage ratios and the smallest possible bending radii of the compensating means, but arrangements are also possible in which the two rollers are arranged at the same height, for example at the lower edge of the elevator car. Also, the support means guide not - as previously described - be diagonally extending, but also vertically extending configured in the elevator shaft.

Another, on the previously described constructive design variant performs the compensating means on rollers that protrude beyond a side wall of the elevator car, ie, the rollers are not placed on the bottom or the wall of the elevator car, which is opposite to the guide rails, but to one or - as a symmetrical pair - preferably on both side walls of the elevator car.

A further preferred embodiment variant provides on both sides of the elevator car in front of a winding shaft diagonally extending guide of the compensating means. This would require that the door of the elevator car is preferably placed on the front side (the guide rails opposite side) of the elevator car.

The compensating means described so far is fixedly fixed at its two ends. Calculations for this

Design variant have shown that the compensating means acts in this case with a slightly variable torque against the overturning moment of the elevator car. Within the fixed fastening points of the compensating means, when the elevator car moves, there is a displacement of a constant, unchangeable length variable, which is formed by the distance from the first roller to the elevator car to the second roller to the elevator car. As a result, for example, when the elevator car ascends, the length of the free piece of compensating means increases from the lower attachment point to the first roller. This increase in length occurs at the expense of a decrease in the free length of the compensating means from the second roller to the upper attachment point. This increase or decrease of a length at the expense of the decrease or increase in the other length takes place in practice not absolutely 1: 1. In other words, the torque, which according to the invention is opposed to the overturning moment of the elevator car, has a certain value when the elevator car is in the center of the elevator shaft. This value is formed by a tensile component (pulling away from the guide rails) caused by the lower free piece of balancing means and by a pressure component (pushing towards the guide rails) caused by the upper free piece of balancing means. Towards the lowest and the highest position of the elevator car in the elevator shaft, the two components of the torque shift accordingly. Thus, in the highest position of the elevator car, the pressure component on the guide rails at the top of the elevator car reaches a peak, while at the same time reaching the lowest value of the tension component away from the guide rails at the lower edge of the elevator car. In the lowest position of the elevator car in the elevator shaft, it is correspondingly reversed.

As already mentioned, the difference is small. Thus, for example, expressed in a length deviation, the difference in length is only 0.156 m, with a total length of the compensating means of 14 m and a possible

Accessibility of a minimum length of the upper free piece or the lower free piece of 2.28 m. The length of 2.28 m corresponds to the length of the hypotenuse in a right-angled triangle formed by a horizontal catheter in the form of the cabin depth (1.2 m) and a vertical catheter in the form of a minimally free shaft head height. In other words, the calculation is based on the assumption that the upper edge of the elevator car or the lower edge of the elevator car can approach a maximum of 2 m to the shaft ceiling or the shaft floor, from which Consequently, a minimum length of the free pieces of the compensating means of 2.28 m results.

The longer the compensating means is in total, i. E. the higher, on the one hand, the elevator shaft is, or the longer, on the other hand, the free pieces can be held with respect to their minimum distance, the smaller the length difference becomes. This means that the design variant described impresses with particular simplicity and is particularly well suited for high elevator systems and / or elevator systems with a deep shaft pit and a high shaft head.

However, a further design variant based on this basic variant also provides for a compensation of the occurring length or torque difference.

A variant embodiment, in order to achieve this, provides a compensating means which has a defined elasticity range which is wider than the difference in length.

A further embodiment variant, with which the difference in length can be compensated, provides a weight-loaded compensating element. For this purpose, one of the two fixedly secured ends of the compensating means is no longer fixed, but acted upon in a deflection roller with a defined weight. Alternatively or in combination, a spring-loaded rocker can fulfill the same task.

In this regard, further according to the invention, the weight is selected in terms of its mass so that it, according to the most common cabin or building use, a certain value of the tilting or load moment of the elevator car so compensates that the tensile or compressive forces occurring the guide rails or the guide shoes of the elevator car at this value is zero. This value may be in the long-term average at half the payload or lower. If the elevator car is empty, or is loaded to the maximum, then only half the tilting or load torque acts on the guides.

According to the invention, the weight of an approximately horizontally disposed lever is adjustable and equipped with an electric-electronic control or safety switch for detecting a Aufsitzens the lever, which is connected to the entire safety circuit of the elevator system.

A further embodiment variant, with which the difference in length can be compensated, sees a

Spring reinforcement of one or both rollers on the elevator car. The rollers can thereby provide in the horizontal direction for a defined compensation in the tension of the compensating means.

A related embodiment variant provides for the compensation of the difference in length by a controlled adjustment of the rollers on the elevator car in the horizontal direction. For this controlled adjustment, for example, piston or a spindle can be provided, which by means of

Information as to how high the elevator car in the elevator shaft is currently controlled. Accordingly, the rollers are moved horizontally as needed. In this way, the Z-shaped arrangement of the compensating means can be spread more or less adaptively in the horizontal direction, but also the ratio of the tensile force of the upper free piece of the compensating means to the tensile force of the lower free piece of the compensating means can be influenced. Another adjustment of the compensating torque results from sensors which are arranged in the guide shoes of the elevator car. These sensors measure the occurring tensile or compressive force and can on the one hand so provide a balance that of the

Moment difference due to different high positions of the elevator car in the elevator shaft.

On the other hand, however, there is also an opportunity to adapt to different loads or different load distributions in the elevator car. If, for example, passengers are standing far away from the guide rails in the elevator car, then a greater tilting or load moment arises than if they were standing close to the guide rails. The sensors detect this new load situation and give a corresponding control command to a corresponding horizontal movement of the rollers, so that the effect of the compensation means changes so that the new load situation is compensated.

The guide shoes can be additionally equipped with dampers that dampen any torque peaks that occur when driving off or stopping.

Avoidance of the occurrence of torque peaks, both of the tilting or load moment, as well as of the opposing moment, which is generated by the compensating means, can be achieved by particularly smooth roller guides or sliding material. Preferably, the roller guides have a low coefficient of friction and almost identical coefficients of friction with respect to static and dynamic friction.

An inventive influence on the balancing torque also results from the design a fixed attachment point as horizontally movable. Thereby, the occurring length difference can be compensated, but also the tension angle, ie, the angle of attack of the tensile force on the roller results in an altered parallelogram of forces with an altered horizontal compensating force component.

A further embodiment variant of an elevator system according to the invention provides that the elevator car is suspended eccentrically in two respects. In other words, the elevator car is suspended from a corner, for example for construction reasons of the building. Thus, the tilting or load moment of the elevator car occurs diagonally. The solutions described so far went from a placement of the suspension of the

Elevator car on an imaginary extension line from the center of gravity of the elevator car perpendicular to that edge of the elevator car, which rests against the guide rails. However, if this imaginary extension line (heavy line) lies on the diagonal of the (usually rectangular or square) plan view surface of the cabin body or even a body diagonal of the cabin body, so this embodiment variant according to the invention provides, in addition to the one or two parallel compensation means, a further, at right angles led compensation means , The compensation directions thus acting in combination can thus compensate for a diagonally occurring tilting or load torque according to the invention.

In the context of the present invention is also an embodiment in which the compensating means is not stationary attached to the elevator shaft walls, but attached to the guide rails of the elevator car. The previously shown and inventive Z-shaped arrangement of the compensating means can be realized in this case by the elevator car not only on the side in or along guide rails runs on which the counterweight, the drive and the eccentric suspension are, but also on the opposite side. The elevator car thus runs, for example, on all four edges on guide rails; However, due to the eccentric suspension of the elevator car and the tilting moment caused thereby still occur tensile and compressive forces in the guides, which it according to the invention to eliminate or at least weaken.

In this regard, a first embodiment variant this can be achieved according to the invention by the compensating means is attached in parallel in separate guide shoes, which are arranged at a distance above and below the elevator car. As a result, the absorption of the tensile and compressive forces caused by the tilting moment is advantageously distributed over a greater length of the guide rails.

The disadvantage of this arrangement according to the invention, however, is that thereby a mobility of the elevator car is placed in a particularly high and a particularly low position. Accordingly, a second embodiment variant in this respect provides, in addition to the two (or four) guide rails for the elevator car, further fastening rails provided only for the compensating means. At least two such opposing mounting rails thus assume the tilting moment-eliminating arrangement of the otherwise also Z-shaped compensating means. As a result, the recording of the tilting moment is no longer distributed over a greater length of the elevator car guide rails, but ensured by specially provided mounting rails. Thus, the guide shoes of the compensating means no longer have to be at a distance from the guide shoes of the elevator car but can be placed at the same height. The disadvantage of abandoning possible mobility of the elevator car in a particularly high and a particularly low position, or the need for a high shaft head and a deep shaft pit thus eliminated.

The described inventive variants of embodiment is common that the elevator car is hung eccentrically and thereby a tilting moment or unwanted forces occur in the guides. Furthermore, they have in common that counteracting these forces by means of a compensating means. This is realized, for example, in a Z-shaped guide of the compensating means via at least two rollers on the elevator car by a first roller from the center of gravity of the elevator car to the elevator car suspension is arranged offset and a second role from the center of gravity of the elevator car away from the elevator car Suspension is arranged offset. The first role is overlapped, the second is unterschlungen.

Thus, the described embodiments of the invention can be combined with each other. In particular, the adjustment and adaptation options described in paragraphs [0021] to [0030] are applicable to all design variants.

An elevator suspension according to the invention has the following advantages:

- An imposed for cost reasons or building conditions eccentric suspension is balanced in terms of forces and loads.

- The guides for the elevator car no longer have to be so costly and complex designed to withstand higher loads than the pure leadership of the elevator car. - The compensation of the loads occurring is inexpensive and realized with few individual parts.

- The driving forces can be reduced because the guides run easier.

- The wear of the guides and thus their maintenance intensity decreases.

The forces transferred from the guide rails to the building are both static and dynamically lower.

- The noise is lower.

- The compensation of the tilting or load torque is customizable. - The compensation of the respective, current tilting or

Lastmomentes is constantly controllable adaptive.

- A suspension of the elevator car at only one of its corners is feasible.

Further or advantageous embodiments of the elevator suspension according to the invention, or the suitably designed elevator installation, form the subject matters of the dependent claims.

Based on figures, the invention is explained symbolically and by way of example closer. The figures are described coherently and comprehensively. The same reference symbols denote the same components, reference symbols with different indices indicate functionally identical or similar components.

In the process, they show

Fig. 1 is a schematic representation of an elevator system in a backpack suspension with an inventive

Balancer; FIG. 2 a schematic representation of the elevator installation according to the invention from FIG. 1 in plan view; FIG. 3 shows a further embodiment variant of an elevator installation or compensation device according to the invention; Fig. 4 shows a further embodiment variant of an inventive elevator system or equalization device and 5 shows a further embodiment variant of an elevator installation or compensation device according to the invention.

1 shows an elevator installation 100 with an inventive compensation device 200. In one

Elevator shaft 1 is an elevator car 2 arranged movable, which is connected via a support means 3 with a movable counterweight 4. The support means 3 is driven during operation with a traction sheave 5 of a drive unit 6. The elevator car 2 is located in a so-called

Backpack suspension, which can cause a tilting or load moment M for the elevator car 2 from a center of gravity S. The elevator car 2 and the counterweight 4 are guided by means of extending over the shaft height guide rails 7 and 7a. The elevator car 2 has an upper edge 8 and a

Lower edge 9 on. At the latter, a first roller 10a and a second roller 10b are arranged. The first roller 10a is placed offset from a center of gravity SL toward the guide rail 7 of the elevator car 2. The second roller 10b, however, is offset from the centroid line SL in the other direction, away from the guide rail 7. A compensating means 11 is guided so that it underlies the second roller 10b away from an attachment point 12a and over-slips the first roller 10a. From the first roller 10a away the compensating means 11 is guided to a second attachment point 12b, which is located in a lever 15. The lever 15 is rotatably articulated in a pivot point 21 and carries a weight 14 which can be moved on the lever 15. Under the lever 15 is a safety switch 20, which triggers when sitting of the lever 15 due to elimination of the tension in the compensating means 11 through the then downwardly rotating lever 15.

The guidance and tension of the compensating means 11 causes a compensation of the tilting or load moment M. The mass of the weight 14 may in this case be chosen such that the one Value of the tilting or load torque M can be compensated to zero, which corresponds to the most frequent payload of the elevator car 2.

FIG. 2 schematically shows the invention described in the preceding FIG

Elevator installation 100 with the compensation device 200, but this time in a plan view, so that the elevator car 2, viewed from above, no longer has only the upper edge 8, but also an upper edge 8a opposite it.

In contrast to hitherto, it can be seen that the compensating means 11 undermines the elevator car 2 in the center. Furthermore, it can be seen in this illustration that the guide rail 7 for the elevator car 2 with a mirror-symmetrically arranged guide rail counterpart 7 ^{Λ forms} a pair and the guide rail 7a for the counterweight 4 with a mirror-symmetrically arranged guide rail counterpart 7a ^Λ .

In Fig. 3, an elevator system 100a according to the invention is shown with an inventive compensation device 200a. The compensating means 11 is also Z-shaped as before around the first roller 10a and the second roller 10b. The first roller 10a is arranged as before on the lower edge 9 of the elevator car 2, the second roller 10b this time, however, at the

Upper edge 8 of the elevator car 2. The rollers 10a and 10b are designed so that they protrude beyond the illustrated side wall of the elevator car 2. The compensating means 11 is attached with its free ends respectively to fastening points 12c and 12d which are as far as possible, but preferably displaceable in the horizontal direction. The attachment point 12c, or even the attachment point 12d can also, according to the principle of FIG. 1, be subjected to a weight. The rollers 10a and 10b are preferably horizontally displaceable arranged on the side wall of the elevator car 2.

Cabin guides 17a and 17b are provided with a sensor 16a and 16b, so that the tensile load in the cab guide 17a and the pressure load in the cab guide 17b can be measured and, based on this measurement signal, the horizontal movability of the rollers 10a and 10b and / or the attachment points 12c and 12d can be controlled.

Thus, the now taking place laterally on the elevator car 2 compensation of the tilting or load torque M remains in the plane of the drawing, is preferably on the rear side wall of the elevator car 2 an identical and symmetrical leadership of a - not visible, because hidden in this side view - second compensating means IIa provided on identical and symmetrically arranged rollers 10c and 10d. This second compensating means IIa would then be attached to symmetrical attachment points 12e and 12f, wherein an optional weight compensation can then be realized cumulatively with a weight for both compensating means 11 and 11a.

4 shows schematically and in plan view a further embodiment variant of an elevator system 100b according to the invention with an inventive compensation device 200b. The elevator car 2 is hung on a corner, which can be seen from the fact that the traction sheave 5 is placed there. Consequently, the center of gravity S is shifted and there is a tilting or load moment M, which acts diagonally and consists of torque components Ml and M2. The compensating means 11 compensates for the moment component M2 as usual, while another compensating means 11b extending at right angles to the compensating means 11 compensates the moment component M1. As previously disclosed, the compensating means IIb undermines the elevator car 2 with rollers 10e and 10f and is fixed on the shaft side in an attachment point 12g.

5 shows schematically a further embodiment variant of an elevator system 100c according to the invention with an inventive compensation device 200c. As previously disclosed, the elevator car 2 is held in a Z-shaped manner over the rollers 10a and 10b by a compensating means 11c. However, the compensating means 11c is fixed in a compensating means guide 18a running along with the elevator car. The compensating means 11c is therefore no longer stationary in contrast to the previous design variants.

In this illustration, the Ausgleichsmittel- guide 18a, as the car guides 17a and 17b, also runs on the guide rail 7. A preferred variant, however, next to the guide rail 7 to arrange a mounting rail 19a, not shown here, the only for the run and the stop is reserved by the compensating means guide 18a. On the opposite side of the shaft is shown that a mounting rail 19b is arranged only for a compensating means guide 18b.

Claims

claims

1. elevator installation (100) with at least one elevator car (2) and with at least one counterweight (4), both with a via a traction sheave (5) of a drive (6) guided support and propellant means (3) in opposite directions on at least one guide rail (7) in an elevator shaft (1) are movable, wherein the supporting and propellant means (3) eccentrically to a center of gravity (S) of the elevator car (2) directly to the elevator car (2) is fixed, so thereby a tilting or Lastmoment (M), which is compensated by a compensating device (200) characterized in that the compensating device (200) comprises: at least one first roller (10a) on the elevator car (2), wherein the first roller (10a) from the center of gravity ( S) of the elevator car (2) offset from the at least one guide rail (7) of the elevator car (2), at least one second roller (10b) on the elevator car (2), wherein the second roller (10b) from the center of gravity (S) the elevator car (2) w eg from the at least one

Guide rail (7) of the elevator car (2) is arranged, and a Z-shaped arrangement of a compensating means (11) which forms a wrap of the first roller (10a) and the second roller (10b) on the elevator car (2).

2. elevator installation (100) according to claim 1, characterized in that the compensating device (200) at an upper edge (8) of the elevator car (2) with the elevator car (2) revolving mechanical end device and a lower edge (9) of the Elevator car (2) with the elevator car (2) entraining pulling mechanical device comprises.

3. elevator installation (100) according to claim 1 or 2, characterized in that the compensating means (11) is a belt with Stahlzugträger or a Gallkette.

4. elevator installation (100) according to claim 1, 2 or 3, characterized in that the first roller (10 a) and the second roller (10 b) at the lower edge (9) of the elevator car (2) are arranged and that the compensating means (11 ) of the first roller (10a) and of the second roller (10b) in each case parallel to the walls of the elevator shaft (1) to a respective attachment point (12a, 12b) is guided.

5. Elevator installation (100) according to claim 1, 2 or 3, characterized in that the first roller (10a) on the lower edge (9) of the elevator car (2) and the second roller (10b) on the upper side (8) of the elevator car are arranged protruding beyond the body of the elevator car (2) and that the compensating means (11) of the first roller (10a) and of the second roller (10b) each diagonally to the walls of the elevator shaft (1) to a respective attachment point (12c, 12d) is guided on the opposite shaft wall.

6. elevator installation (100) according to claim 5, characterized in that a third roller (10c) and a fourth roller (1Od) symmetrical to the first roller (10a) and the second roller

(10b) are arranged on the opposite side wall of the elevator car (2) and that a second compensating means (IIa) is arranged symmetrically to the compensating means (11).

7. elevator installation (100) according to any one of the preceding claims 1-6, characterized in that the compensating means (11) is defined elastic.

8. elevator installation (100) according to one of claims 4-7, characterized in that at least one attachment point (12) of the Compensation means (11) is realized with a weight (14) and that the mass of the weight (14) is designed for the most frequent payload of the elevator car (2).

9. elevator installation (100) according to claim 8, characterized in that the weight (14) is adjustably arranged on a in a pivot point (21) rotatably hinged lever (15) and that a safety switch (20) outputs a signal with eliminated counterclaim.

10. elevator installation (100) according to one of the preceding claims 1-9, characterized in that at least one of the rollers (10) is horizontally adjustable and that at least one of

Fixing points (12) is horizontally adjustable.

11. elevator installation (100) according to claim 10, characterized in that by a sensor (16) in cabin guides

(17) the elevator car (2) a signal can be output, with which the horizontal adjustment of the rollers (10) or the horizontal adjustment of the attachment point (12) is controllable.

12. elevator installation (100) according to any one of the preceding claims 1-11, characterized in that the supporting and propellant means (3) at a corner of the elevator car (2) is fixed and that a second or third compensating means (Hb) at right angles to the compensating means (11) or to the compensating means (11) and the second compensating means (IIa) extends.

13. elevator installation (100) according to any one of the preceding claims 1-12, characterized in that the elevator shaft (1) at least one further guide rail (7b) for the elevator car (2), which is opposite to the guide rail (7) and that or the compensating means (11, Ha, Hb) on these guide rails (7, 7b) with compensating means Guides (18a, 18b) with the elevator car (2) are attached running.

14. elevator installation (100) according to claim 13, characterized in that with the elevator car (2) follower balancing guides (18a, 18b) are arranged on only provided for this purpose mounting rails (19a, 19b).