EP3578495A1 - Lift system with a self-clamping cord-like compensation weight arrangement - Google Patents

Abstract

An elevator installation (1) is described which has a car (3), a counterweight (5), a rope-like suspension element arrangement (7), a rope-like compensation weight arrangement (9) and a drive arrangement (11). The compensation weight arrangement (9) is deflected at a lower deflection position (15) and is effectively connected to the car (3) and to the counterweight (5) in such a way that, on the one hand, a load on a part (17) of the compensation weight arrangement (9) on the car side, the extends between a connection position (19) on the car (3) and the lower deflection position (15), acts on the car (3) and on the other hand a load of a counterweight-side part (21) of the compensation weight arrangement (9), which is between a connection position (23) extends on the counterweight (5) and the lower deflection position (15), acts on the counterweight (5). The counterweight-side part (21) of the compensation weight arrangement (9) is connected to the counterweight (5) via a counterweight-side deflection element (27) rotatable about an axis of rotation (25) in such a way that at least one mechanically tensioning part (29) of the counterweight (5) mechanically In the elevator system (1), the rope-like compensation weight arrangement (9) is kept mechanically tensioned without additional tensioning devices, but by skillfully using at least part of the weight of the counterweight (5).

Description

The present invention relates to an elevator installation. In particular, the invention relates to an elevator system with a rope-like compensation weight arrangement.

In an elevator installation, an elevator cage and a counterweight are typically vertically displaceable within a hoistway. The elevator car and the counterweight are both held by a common rope-like support means arrangement. A "rope-like" arrangement can be understood here to mean an arrangement which is elongate and highly loadable in the direction of extent, but can be bent transversely to the direction of extension. Cable-like support means arrangements can have, for example, one or more carrying cables or carrying straps. A drive arrangement is also provided in the elevator installation for moving the suspension means arrangement and thus displacing the elevator car and the counterweight in opposite directions within the elevator shaft.

In particular, in elevator systems for very tall buildings, the support means arrangement must be very long, for example over 200 m long, in some cases up to 500 m or more long. In this case, a weight of the suspension element arrangement, which holds the counterweight on one side and which holds the elevator car on the other side, is similarly large or even larger than the weight of the counterweight or the elevator car itself. In particular, a free-hanging length and thus the hang Weight of that portion of the suspension element arrangement, which holds the counterweight or the elevator car, from where these two counter to be moved elevator components within the elevator shaft are currently.

In order to compensate for differences in weight between that portion of the suspension element arrangement which holds the counterweight and that portion of the suspension element arrangement which holds the elevator car, a rope-like compensation weight arrangement is often suspended downwardly between the elevator cage and the counterweight in the case of high elevator installations. This rope-like compensation weight arrangement can, for example, via one or more compensation chains or one or more compensation ropes or Compensating belts (hereinafter, these various elongated compensation weight means are to be referred to as "compensation ropes").

The compensation cables of the compensation weight arrangement hang down from the elevator car and the counterweight into the elevator shaft down to the vicinity of its shaft bottom. In doing so, these rope-like components of the compensating weight assembly typically need to be mechanically tensioned in some fashion to avoid being able to swing excessively in the hoistway, otherwise they could cross each other or become caught on other components in the hoistway, thereby creating unsafe situations the operation of the elevator system could arise. In particular, the rope-like components of the compensation weight assembly should be mechanically tensioned so that they can not touch, damage or even destroy other elevator equipment. Also, contact with the moving rope-like suspension means arrangement should be avoided.

In conventional elevator systems, the cable-like compensation weight arrangement is usually mechanically tensioned for this purpose by means of a tensioning device. Such a tensioning device is usually installed in a shaft pit of the elevator shaft. In general, the clamping device is designed to deflect a cable-like component on the one hand. On the other hand, the tensioning device should mechanically load the cable-like component away from the elevator car and the counterweight, that is, in a downward direction, so that the cable-like component is mechanically tensioned and thus prevented from free swinging within the elevator shaft.

However, clamping devices conventionally used in elevator systems are relatively complex and / or expensive to install. On the one hand, the tensioning device should reliably and always sufficiently hold the cable-like component of the compensation weight arrangement under mechanical tension. On the other hand, however, the tensioning device should also be able to yield sufficiently in the event of excessive loads due to the cable-like component in order not to jeopardize the integrity of the cable-like component.

For this purpose, in conventional tensioning devices, for example, a roller used as a deflection element must be able to displace vertically relative to the shaft bottom. Such displacement should be as mechanically damped as possible in order to prevent excessive vibrations within the tensioning device and / or the rope-like component and / or to prevent a jump of the cabin and / or the counterweight. Accordingly, conventional tensioning devices usually have at least one movable and displaceable deflecting element, which is loaded, for example, by means of a spring element towards a desired position and whose displacement is mechanically damped by a damping element.

In addition, a tensioning device conventionally used in an elevator system causes an additional mechanical stress on the rope-like compensation weight arrangement, which acts as an additional weight to be held in the elevator installation. However, this additional weight does not support the weight compensation to be effected by the compensation weight arrangement within the elevator installation and is therefore to be regarded as "dead weight".

There may be, inter alia, a need for an elevator installation in which a cable-type compensating weight assembly is mechanically tensioned in an alternative manner. In particular, there may be a need for an elevator system which has a rope-like compensating weight arrangement and is relatively simple in construction and / or in which the rope-like compensation weight arrangement can be kept taut without producing excessive "dead weight".

Such a need can be met by the elevator installation according to the independent claim. Advantageous embodiments are defined in the dependent claims and explained in the following description.

According to one aspect of the invention, an elevator system is proposed, which has a car, a counterweight, a rope-like suspension element arrangement, a cable-like compensation weight arrangement and a drive arrangement. The Tragmittelanordnung is deflected at an upper deflection and is on the one hand to the cab and on the other hand to the counterweight effectively connected to hold their load. The drive assembly cooperates with the suspension means assembly to displace the cabin and counterweight in opposite directions. The compensation weight arrangement is deflected at a lower deflection position and is operatively connected on the one hand to the cabin and on the other hand to the counterweight such that on the one hand a load of a cabin side part of the compensation weight arrangement which extends between a connection position on the cabin and the lower deflection position, on the cabin On the other hand, a load of a counterweight-side part of the compensation weight assembly extending between a connection position to the counterweight and the lower deflecting position acts on the counterweight. The counterweight-side part of the compensation weight assembly is connected to the counterweight via a counterbalancing member rotatable about an axis of rotation such that at least a portion of the counterweight, referred to herein as a mechanically-biasing member, acts mechanically stressingly on the compensation weight assembly.

Possible features and advantages of embodiments of the invention may be considered, inter alia, and without limiting the invention, as being based on the ideas and findings described below.

As a basic idea underlying the embodiments of the present invention, it can be considered to design and guide the rope-like compensation weight arrangement in an elevator installation by means of a counterweight-side deflection element, so that the rope-like compensation weight arrangement is no longer necessarily mechanically tensioned by means of an additionally provided tensioning device needs. Instead, the cable-like compensation weight arrangement can be held mechanically tensioned by means of the counterweight of the elevator installation or at least part of the counterweight of the elevator installation. The counterweight or the mechanically exciting part of the counterweight can in this case act as a load on the cable-like compensation weight arrangement such that it is tensioned. In this case, the configuration and arrangement of the compensation weight arrangement and the counterweight-side deflecting element is selected such that the counterweight on the one hand as in a conventional elevator system for at least partial compensation of the weight of the elevator car is used, on the other hand, but at least a portion of the counterweight and the cable-like compensation weight assembly loaded to train and thus mechanically under tension.

Details of embodiments of the invention as well as terms used in this regard will be explained below.

The cabin is used to pick up passengers and carry them vertically in a building using the elevator system.

The counterweight is coupled to the car via the cable-like suspension means arrangement and serves to compensate for a weight of the car as well as possibly at least part of the weight of passengers therein, in order to use less force to convey the car. The counterweight may be in one piece, but may also be composed of several sub-elements. In particular, the counterweight may have a frame in which one or more weight elements are held.

The rope-like suspension means arrangement can serve to hold the load of the car as well as the counterweight. For this purpose, the rope-like support means arrangement is designed for a given mechanical load on train. For such a design, the weight of the counterweight and the maximum permissible weight of the loaded cab is used and additionally given predetermined safety factors. The cable-like support means arrangement can be connected directly to the car and / or the counterweight, for example, by one end of the suspension element assembly is connected via a coupling device fixed to the car or the counterweight. Alternatively, the cable-like support means arrangement can be indirectly connected to the car and / or the counterweight, for example by interposing a coupling element such as a deflection roller. In both cases, the suspension element arrangement is effectively connected on the one hand to the cabin and on the other hand to the counterweight, ie the weights of each of the car and the counterweight act on the suspension means arrangement.

The drive assembly is adapted to drive the cable-like support means assembly and thus to displace the car and counterweight in opposite directions. For this purpose, the drive assembly usually has a motor that drives a traction sheave, which in turn moves the suspension element assembly.

The rope-type compensating weight assembly may serve to at least partially compensate for differences in weight arising during operation of the elevator system in response to a relative position between the counterweight and the cab, because portions of the rope-like suspension means assembly which on one side of the drive assembly counterbalance and on another Side of the drive assembly hold the car, depending on the current relative position between the counterweight and the cabin are different lengths and thus are different heavy and thus exert different mechanical loads on the drive assembly.

The rope-like compensation weight arrangement may comprise one or more compensation ropes and / or one or more compensation belts and / or one or more compensation chains. The compensation ropes, belts or chains may, but need not necessarily, be the same or similar, as rope-like components of the suspension element assembly.

The rope-like compensating weight arrangement may be directly or indirectly connected to the cabin similarly to the rope-like suspension means arrangement. In other words, the rope-like compensation weight arrangement can be fixed with one end directly to the cabin. Alternatively, the rope-like Kompensationsgewichtsanordnung be guided over a fixed to the cabin deflection roller and be anchored with its end, for example, fixed to the shaft bottom of the elevator system.

Coming from the cab, the cabin-side part of the compensation weight arrangement extends between a position at which the compensation weight arrangement engages the cabin or a component fastened thereto and the lower deflecting position at which the compensation weight arrangement is deflected. At least this cabin side part of the compensation weight arrangement causes an additional weight on the cabin, the extent of which depends on how long the cabin-side part of the compensation weight arrangement is current, ie how far away the cabin is currently from the lower deflection position.

At the lower deflection position, the rope-like compensation weight arrangement is deflected, for example by 180 °, and then extends up to the counterweight. For this purpose, one or more deflection rollers may be provided at the lower deflection position. A counterweight-side part of the compensation weight arrangement thereby extends between the connection position at which the compensation weight arrangement is attached to the counterweight and the lower deflection position. At least this counterweight-side portion of the compensation weight assembly adds additional weight to the counterweight, the extent of which in turn depends on how long the counterweight-side portion of the compensation weight assembly is current, that is, how far the counterweight is currently away from the lower deflecting position.

The counterweight side portion of the compensating weight assembly is then operatively connected to the counterweight or at least one mechanically engaging portion of the counterweight. However, the counterweight-side part of the compensation weight arrangement does not run directly from the lower deflection position towards the counterweight. Instead, the counterweight-side portion of the compensation weight assembly is attached to the counterweight via a rotatable counterweight-side diverter member. The deflecting element is rotatable about a rotational axis, rotatable and / or pivotable. Eventually, the deflecting element may also be composed of a plurality of partial deflecting elements, which are each rotatable about their own axis of rotation. A direction of action of a force acting on the compensation weight arrangement force is deflected by the deflecting element, for example by 180 °.

Thus, the counterweight side portion of the compensation weight assembly may, for example, hang down on one side of the diverter, toward the lower divert position, and thus exert a downward weight force. This downwardly directed weight force then causes on an opposite side of the deflecting an upward force on a part running there the compensation weight arrangement or the attached counterweight or exciting part of the counterweight.

Expressed in opposite direction of action causes the counterweight or the exciting part of the counterweight a downward force on one side of the deflecting element, due to which then the counterweight-side part of the compensation weight assembly on the other side of the deflecting pulled up and stretched.

Due to this connection of the compensation weight arrangement after deflection via the deflecting element, it can be effected that the counterweight or at least a part thereof acts not only as a load on the suspension element arrangement but also as a load on the compensation weight arrangement and thus also biases the compensation weight arrangement mechanically to tension.

According to one embodiment, the counterweight-side deflecting element is arranged above the mechanically exciting part of the counterweight.

In other words, the counterweight-side deflecting element should be located directly vertically above or possibly laterally offset vertically above the mechanically exciting part of the counterweight. The mechanically exciting part of the counterweight can thus cause due to gravity, a downward force on one side of the overlying counterweight deflection element, which then on a relative to the axis of rotation of the deflection opposite side of the deflection an upward and thus exciting on the Kompensationsgewichtsanordnung acting force causes. The counterweight-side deflection element may need to be arranged only slightly above the exciting part of the counterweight, but preferably at least by a distance by which the maximum distance from the axis of rotation located parts of the deflecting element should be able to move vertically. For example, the counterweight-side deflecting element may be arranged at least 10 cm, preferably at least 20 cm, more preferably at least 50 cm above the mechanically exciting part of the counterweight. It should be emphasized that the deflection or at least its axis of rotation, although above the entire Counterweight can be arranged, but this need not necessarily be the case. The deflecting element can also be attached to the counterweight itself, provided that the counterweight is at least two parts and the deflecting element, for example, above the mechanically exciting part of the counterweight, which may be movable relative to a remainder of the counterweight, is arranged.

In an alternative embodiment, the counterweight-side deflecting element can also be arranged below the mechanically exciting part of the counterweight.

According to one embodiment of the invention, the counterweight-side deflection element is formed with a roller which is rotatable about the axis of rotation, wherein the rope-like compensation weight arrangement is guided over the roller and is connected to the mechanically exciting part of the counterweight.

In other words, the cable-like compensation weight arrangement can be deflected by means of a roller, over the lateral surface of which the cable-like compensation weight arrangement extends, for example over an angular range of approximately 180 °. The roll can be cylindrical. Since the role in the specified application usually only needs to rotate by a few degrees or a few tens of degrees, but the role may also have a deviating from a circular cross-section. The roller may be operatively connected directly or indirectly to the rope-like suspension means assembly. For example, the roller can be held by a holder, which on the one hand rotatably holds the roller on its axis of rotation and on the other hand is held by the rope-like suspension element arrangement. The guided over the roller rope-like Kompensationsgewichtsanordnung can thus on the one hand its own weight, in particular the weight of the counterweight-side part of the Kompensationsgewichtsanordnung, and on the other hand, the attached at its end weight of the counterweight transferred to the role and pass on the role of the role holding the support means arrangement.

An embodiment of the deflecting element with or as a roller is technically easy to implement and / or easy to install.

According to an alternative embodiment, the counterweight-side deflecting element is formed with a lever which is rotatable about the axis of rotation, wherein the mechanical exciting part of the counterweight is attached to a first side of the lever and the counterweight-side part of the compensation weight assembly is connected to an opposite second side of the lever.

In other words, as a counterweight-side deflecting element, a lever may be provided, the two arms of which extend on opposite sides of the axis of rotation. The cable-like compensation weight arrangement does not need to be guided continuously over the deflecting element in this case. Instead, the rope-like compensating weight assembly may, for example, be in two parts, one end of the counterweight side portion of the compensating weight assembly engaging one of the arms of the lever, whereas a portion of the compensating weight assembly connected to the tensioning portion of the counterweight engages the other arm of the lever. Optionally, the rope-like compensation weight arrangement can also engage only one of the arms of the lever and the other arm of the lever be rigidly connected to the exciting part of the counterweight.

Thus, the weight of the counterweight-side part of the compensation weight arrangement can be deflected by the lever and transmitted as an upward force to the exciting part of the counterweight.

Optionally, the two arms of the lever may be of different lengths, that is, the axis of rotation of the lever not in the center, but be arranged off-center. As a result, the leverage laws can be adjusted according to a displacement effect and an associated force.

An embodiment of the deflecting element with or as a lever is technically easy to implement and / or to install.

According to one embodiment, the suspension element arrangement is operatively connected to the counterweight-side deflection element at a holding position, which is located in a vertical plane which encloses the axis of rotation of the counterweight-side deflection element.

In other words, the counterweight-side deflection element can be designed and arranged such that it can be held by the suspension element arrangement. A holding position at which the support means acts on the deflecting element or a holder holding the deflecting element should be located in a plane which runs vertically and which encloses the axis of rotation of the counterweight-side deflecting element. In other words, the suspension element arrangement can hold the counterweight-side deflection element in such a way that its axis of rotation settles vertically below the retaining position. Such held counterweight deflection element may be formed as a role or as a lever. The weight of the attached to the deflecting counterweight side of the Kompensationsgewichtsanordnung and the weight of the mechanically exciting part of the counterweight act on the counterweight-side deflecting element on this holding support means arrangement.

According to one embodiment, the counterweight-side part of the compensation weight arrangement is connected to the counterweight via the rotatable counterweight-side deflecting element such that a total weight of the counterweight acts mechanically exciting on the compensation weight arrangement.

In other words, it can be advantageous if the entire counterweight acts as a mechanically exciting part of the counterweight in order to keep the rope-like compensation weight arrangement tensioned. Due to the high total weight of the counterweight, the rope-like compensation weight arrangement is reliably prevented from swinging excessively in the lateral direction.

According to an alternative embodiment, the counterweight side portion of the compensating weight assembly is tied to the counterweight via the rotatable counterweight side diverter such that only a partial weight member is mechanically biased on the compensating weight assembly, the partial weight member forming part of the counterweight and relative to a remainder of the counterweight in a vertical direction is relocatable.

In other words, it is not necessary to use the entire counterweight as a load to put the compensation weight arrangement under tension. Instead, you can it is sufficient to provide a partial weight element on the counterweight, which indeed contributes to the total weight of the counterweight, but which can be displaced relative to a remainder of the counterweight in the vertical direction at least over a small distance, for example by a few centimeters or a few decimeters. In this case, then only the partial weight element with its partial weight needs to load on the counterweight-side part of the compensation weight arrangement and tension it. Accordingly, the forces exerted on the rope-like compensation weight arrangement may be less than if the entire weight of the counterweight were used as the exciting force. Thus, for example, the rope-like compensation weight arrangement itself, but also the counterweight-side deflection element and / or other components can be dimensioned smaller and / or designed for lower loads.

According to one embodiment, the cable-like compensation weight arrangement is deflected at the lower deflecting position by at least one fixedly mounted ground-level deflecting element.

Thus, the rope-like compensation weight arrangement extending between the car and the counterweight can not only sag loosely downwards in the hoistway, but is held and deflected by the ground-level deflector in a partial area near the ground. The ground-level deflecting element may be similar to the counterweight-side deflecting element designed as a roller, lever or the like and be rotatable about an axis of rotation.

In contrast to conventional elevator systems, in which a holding and a deflection of a compensating rope takes place with a tensioning device in which a deflecting element is pivotally or otherwise vertically displaceable, needs in the presently described embodiment, the deflecting only rotatable, but not displaceable, in particular not be vertically displaceable. In other words, the axis of rotation of the deflecting element may be arranged stationary, for example, relative to the shaft bottom of the elevator installation. The ground-level deflector can thus be relatively simple and / or installed.

According to an embodiment that is particularly easy to implement, the ground-level deflecting element comprises a rotatable roller fixedly mounted in a hoistway.

The roller may be attached to or near the bottom of the hoistway. For this purpose, a holder on the one hand hold the roller on its axis of rotation and on the other hand be firmly anchored in the elevator shaft. The cable-like compensation weight arrangement can in this case again be guided around a lateral surface of the roller and in this case in particular be deflected by about 180 °. The ground-level deflecting element can also by means of several partial deflection elements, i. For example, a plurality of rollers, be formed, wherein the rope-like compensation weight arrangement extends in this example to parts of the lateral surface of such rollers, for example, deflected by about 90 °.

In particular, according to one embodiment, the ground-level deflection element allow a displacement of the rope-like compensation arrangement substantially unattenuated.

In other words, in conventional tensioning devices for compensating ropes in elevator systems, it has usually been necessary to dampen a displaceable deflecting element, such as a roller held on a pivoting arm, in such a way that the deflecting element can not vibrate excessively under changing loads caused by the compensating cable guided over it , In this case, usually a pivoting movement of the pivot arm and / or a rotational movement of the roller was mechanically damped.

In contrast, in the case of the elevator installation described here, the ground-level deflecting element should as far as possible not be vertically displaceable, but at least does not necessarily have to be damped in its movement. In particular, no or at least no substantial damping of the ground-level deflection element is necessary in order to dampen the cable-like compensation arrangement with respect to a displacement thereof. Accordingly, the ground-level deflection element can be constructed relatively simple, for example, as a stationary installed and / or in its rotary motion substantially unattenuated role.

According to one embodiment, the rope-like compensation weight arrangement can be designed to have the same mechanical load-bearing capacity as the suspension element arrangement.

In other words, while the rope-type compensating weight arrangement should generally also have a weight per rope length similar to that conventionally used in elevator installations, which corresponds approximately to that of the rope-type suspension means used in the same elevator installation, to imbalances between the ones towards the car and towards the counterweight, respectively be able to compensate for leading parts of the rope-like support means. In addition, in the rope-type compensating weight arrangement proposed herein, it may be advantageous to dimension or dimension same in tensile strength with respect to their mechanical load capacity as the rope-type suspension means arrangement.

This is particularly advantageous when no longer, as in conventional elevator systems, the entire weight of the counterweight is held exclusively by the suspension element assembly and the Kompensationsgewichtsanordnung need only hold its own weight, but instead parts of the rope-like Kompensationsgewichtsanordnung also the weight of the counterweight or at least the exciting Part of the counterweight should hold.

Under an "equal mechanical load on train" can be understood that the Tragmittelanordnung and Kompensationsgewichtsanordnung are optionally designed taking into account in both cases the same safety factors for a tensile load up to a predetermined maximum force, the predetermined maximum forces are the same in both cases or at most differ from one another by at most 30%, preferably by at most 10%. For example, it may be advantageous to use the same cables or straps for the cable-like suspension element arrangement and the cable-like compensation weight arrangement. This can be achieved in particular a high level of security for the elevator system. In addition, do not need different types of rope-like support means are kept.

It should be understood that some of the possible features and advantages of the invention are described herein with reference to different embodiments of the elevator installation. A person skilled in the art will recognize that the features can be suitably combined, adapted or replaced in order to arrive at further embodiments of the invention.

• Fig. 1 zeigt eine Aufzuganlage gemäß einer Ausführungsform der vorliegenden Erfindung.
• Fig. 2 zeigt eine Aufzuganlage gemäß einer weiteren Ausführungsform der vorliegenden Erfindung.

Embodiments of the invention will now be described with reference to the accompanying drawings, in which neither the drawings nor the description are to be construed as limiting the invention.

• Fig. 1 shows an elevator installation according to an embodiment of the present invention.
• Fig. 2 shows an elevator system according to another embodiment of the present invention.

The figures are only schematic and not to scale. Like reference numerals designate like or equivalent features throughout the several figures

Fig. 1 shows an elevator installation 1 according to an embodiment of the present invention. The elevator installation 1 has a car 3, a counterweight 5, a cable-like suspension element arrangement 7, a cable-like compensation weight arrangement 9 and a drive arrangement 11.

The car 3 and the counterweight 5 are both held by the suspension means 7 effectively against gravity. By displacing the suspension element arrangement 7 by means of the drive arrangement 11, the cabin 3 and the counterweight 5 can be displaced vertically in an elevator shaft 49 in opposite directions. The suspension element arrangement 7 is thereby deflected on an upper deflection position 13 formed at least partially by the drive arrangement 11. In the example shown, the drive assembly 11 in a machine room and thus above a Shaft cover 55 arranged, but could also be mounted within the hoistway 49.

Particularly in the case of a very high elevator installation 1, the weight of that part of the suspension element arrangement 7 which holds the counterweight 5 and that part of the suspension element arrangement 7 which holds the cabin 3 can vary greatly depending on the current relative position between the car 3 and the counterweight 5 , Resulting differences in weight can in particular burden the drive arrangement 11.

In order to compensate for this effect, the cable-like compensation weight arrangement 9 is provided in the elevator installation 1. The rope-like compensation weight arrangement 9, like the suspension element arrangement 7, can have one or more cables, belts or the like. On the one hand, the compensating weight arrangement 9 is effectively connected to the car 3 on the one hand and is operatively connected to the counterweight 5 on the other hand. A cabin-side part 17 of the compensation weight arrangement 9 and, on the other hand, a counterweight-side part 21 of the compensation weight arrangement 9 in the elevator shaft 49 extend downwards to a lower deflection position 15. A weight of the cabin-side part 17 of the compensation weight arrangement 9 on the one hand and a weight of the counterweight-side part 21 of the compensation weight arrangement 9, on the other hand, depend in turn on the current position of the car 3 and the counterweight 5, the dependency being the same as in the case of the suspension means 7, so that weight differences are compensated for overall.

In the example shown, the compensation weight arrangement 9 is deflected at the lower deflection position 15 by a deflection element 45 close to the ground. The ground-level deflection element 45 has two cylindrical rollers 47, over whose lateral surfaces the compensation weight arrangement 9 is guided and deflected. The ground-level deflection element 45 including its rollers 47 is fixedly mounted within the elevator shaft 49, in particular in a hoistway pit 51, that is, the rollers 47 may rotate, but need not be displaced.

On the cab 3, the rope-like compensation weight arrangement 9 is effectively connected in the example shown by a roller attached to the cab 3, which thus forms a connection position 19 on the cab 3. One end of the rope-like compensation weight arrangement 9 is fixed to the shaft bottom 53. From there, the compensation weight arrangement 9 extends to the attachment position 19 on the car 3 upwards and then back down to the lower deflection position 15. From the lower deflection position 15 of the compensation weight assembly 9 extends upward to a connection position 23 on the counterweight 5 and is finally mounted below this attachment position 23 on the counterweight 5. Overall, the compensation weight assembly 9 in this embodiment is in a 2: 1 type configuration.

Of conventional compensation weight arrangements, the rope-like compensation weight arrangement 9 used for the elevator installation 1 presented here differs in particular in that the attachment position 23 up to which the counterweight-side part 21 of the compensation weight arrangement 9 extends upwards and over which the compensation weight arrangement 9 is effectively coupled to the counterweight 5 , is arranged above the counterweight 5. By this arrangement, the counterweight 5 is able to exert a force due to its weight on the rope-like compensation weight assembly 9, which mechanically clamps them.

Im in Fig. 1 As shown, this mechanical stress on the compensation weight arrangement 9 is achieved by providing a counterweight-side deflection element 27 in the form of a roller 31 at the connection position 23. The counterweight-side deflecting element 27 can be rotated about an axis of rotation 25 and is held at a holding position 39 by a counterweight-side part of the suspension element arrangement 7. The rope-like compensation weight arrangement 9 extends from the lower deflection position 15 coming high to the connection position 23 and over a lateral surface of the provided there roll 31 of the counterweight deflection element 27 before it is further mounted below the counterweight 5 and is operatively connected thereto.

Overall, the counterweight-side part 21 of the compensation weight assembly 9 is thus connected to the counterweight 5 via the rotatable about the rotation axis 25 counterweight-side deflection element 27 such that a mechanically exciting part 29th of the counterweight 5, which in this example corresponds to the total weight of the counterweight 5, acts mechanically exciting on the compensation weight arrangement 9.

At the in Fig. 2 In the embodiment shown, most of the elevator components described above are similar in construction to the previously described embodiment and will therefore not be explained again. In contrast to the embodiment described above, however, the compensation weight arrangement 9 and its connection to a mechanically exciting part 29 of the counterweight 5 are designed differently.

In particular, in this embodiment, the counterweight-side deflecting element 27 is formed by a lever 33. In the example shown, the lever 33 is attached to a frame of the counterweight 5 and can rotate about a rotation axis 25. Furthermore, the counterweight 5 has several parts, wherein a partial weight element 41 is vertically displaceable relative to a remainder 43 of the counterweight.

An attachment position 23, on which the counterweight-side part 21 of the compensation weight assembly 9 is attached to the lever 33 of the deflecting element, is again located above the mechanically exciting part 29 of the counterweight 5 in this case as well, this mechanically exciting part 29 being formed by the partial weight element 41 becomes. In an alternative embodiment, the attachment position 23, on which the counterweight-side part 21 of the compensation weight arrangement 9 is attached to the lever 33 of the deflection element, could also be below the mechanically tensioning part 29 of the counterweight 5. The mechanically exciting part 29 of the counterweight 5 is effectively coupled to a first side 35 of the lever 33. The counterweight-side part 21 of the compensation weight arrangement 9 acts on a relative to the rotation axis 25 opposite second side 37 of the lever 33 at. Lever arms on the first and second sides 35, 37 may be the same length or different lengths to achieve different path-to-power ratios.

Also in this second embodiment, the counterweight-side part 21 of the compensation weight assembly 9 on the counterweight 5 is rotatable about the rotation axis 25 rotatable counterweight-side deflecting element 27 in the form of the lever 33 in such a way tied, that the compensation weight assembly 9 is kept permanently tense. In this case, the mechanically exciting part 29 of the counterweight 5 is formed by the partial weight element 41.

In embodiments of the elevator installation 1 proposed herein, the force applied for mechanically tensioning the cable-like compensation weight arrangement 9 can be very large and amount to 5 up to the total weight of the counterweight. In particular, the clamping force can be significantly greater than was generally possible with conventional clamping devices used in elevator systems. This makes it possible to more reliably prevent the rope-like compensation weight arrangement 9 from oscillating excessively in the lateral direction within the elevator shaft 49. In addition, the special configuration of the compensation weight arrangement 9 and the deflection elements 27 used for the proposed elevator installation 1 makes it possible to dispense with a complicated mechanical tensioning device with displaceable and preferably damped moving components in the elevator installation 1. This ultimately results in the possibility of lower costs for the elevator installation 1 and / or a smaller space requirement, in particular in the area of the hoistway pit 51.

Finally, it should be noted that terms such as "comprising,""comprising," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a multitude. It should also be appreciated that features or steps described with reference to any of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limiting.

LIST OF REFERENCE NUMBERS

1

elevator system

3

cabin

5

counterweight

7

rope-like suspension means arrangement

9

rope-like compensation weight arrangement

11

drive arrangement

13

upper deflection position

15

lower deflection position

17

Cabin-side part of the compensation weight arrangement

19

Connection position to the cabin

21

counterweight-side part of the compensation weight arrangement

23

Connection position to the counterweight

25

Rotary axis of the counterweight-side deflecting element

27

counterweight-side deflecting element

29

mechanically exciting part of the counterweight

31

role

33

lever

35

first side of the lever

37

second side of the lever

39

hold

41

Part weight element

43

Remainder of the counterweight

45

ground-level deflection element

47

role

49

elevator shaft

51

Elevator shaft pit

53

shaft bottom

55

shaft ceiling

Claims (11)

Elevator installation (1), comprising: a cabin (3), a counterweight (5), a rope-like suspension means arrangement (7), a rope-like compensation weight arrangement (9), a drive arrangement (11), wherein the suspension element arrangement (7) is deflected at an upper deflection position (13) and is operatively connected on the one hand to the cage (3) and on the other hand to the counterweight (5) in order to hold its load, the drive assembly (11) cooperating with the support means assembly (7) to displace the car (3) and the counterweight (5) in opposite directions, wherein the compensation weight arrangement (9) is deflected at a lower deflection position (15) and is operatively connected on the one hand to the cage (3) and on the other hand to the counterweight (5) such that on the one hand a load of a cabin side part (17) of the compensation weight arrangement (9 ) extending between an attachment position (19) on the cab (3) and the lower deflection position (15) acts on the cab (3) and, on the other hand, a load of a counterweight - side part (21) of the compensation weight assembly (9) extending between a connection position (23) on the counterweight (5) and the lower deflection position (15), acts on the counterweight (5), wherein the counterweight-side part (21) of the compensation weight arrangement (9) is connected to the counterweight (5) via a counterweight (27) rotatable about an axis of rotation (25) in such a way that at least one mechanically exciting part (29) of the counterweight (5) mechanically exciting on the compensation weight arrangement (9) acts. Elevator installation according to claim 1, wherein the counterweight-side deflection element (27) above the mechanically exciting part (29) of the weight of the counterweight (5) is arranged. Elevator installation according to one of the preceding claims, wherein the counterweight-side deflection element (27) is formed with a roller (31) which surrounds the Rotary axis (25) is rotatable and wherein the rope-like compensation weight assembly (9) is guided over the roller (31) and is connected to the mechanically exciting part (29) of the counterweight (5). Elevator installation according to one of the preceding claims 1 to 3, wherein the counterweight-side deflection element (27) is formed with a lever (33) which is rotatable about the axis of rotation (25) and wherein the mechanically exciting part (29) of the counterweight (5) a first side (35) of the lever (33) is connected and the counterweight-side part (21) of the compensation weight arrangement (9) is connected to an opposite second side (37) of the lever (33). Elevator installation according to one of the preceding claims, wherein the suspension element arrangement (7) is operatively connected to the counterweight-side deflecting element (27) at a holding position (39) which is located in a vertical plane which encloses the axis of rotation (25) of the counterweight-side deflecting element (27) , Elevator system according to one of the preceding claims, wherein the counterweight-side part (21) of the compensation weight arrangement (9) is connected to the counterweight (5) via the rotatable counterweight-side diverting element (27) such that a total weight of the counterweight (5) mechanically stresses the compensation weight arrangement (9) works. Lift installation according to one of claims 1 to 5, wherein the counterweight-side part (21) of the compensation weight arrangement (9) on the counterweight (5) via the rotatable counterweight-side deflecting element (27) is connected such that only a partial weight element (41) mechanically exciting on the Compensating weight arrangement (9) acts, wherein the partial weight element (41) forms part of the counterweight (5) and relative to a remainder (43) of the counterweight (5) is displaceable in a vertical direction. Elevator installation according to one of the preceding claims, wherein the rope-like compensation weight arrangement (9) deflects at the lower deflection position (15) by at least one stationary ground-deflecting element (45) becomes. Lift installation according to claim 8, wherein the ground-level deflection element (45) comprises a rotatable roller (47) fixedly mounted in an elevator shaft (49). Elevator installation according to one of claims 8 and 9, wherein the ground-level deflection element (45) allows a displacement of the rope-like compensation arrangement (9) substantially unattenuated. Elevator installation according to one of the preceding claims, wherein the cable-like compensation weight arrangement (9) is designed to have the same mechanical load-bearing capacity as the suspension arrangement (7).

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