EP2082983B1 - Lift assembly - Google Patents

Description

The invention relates to an elevator installation and a method for installing such an elevator installation.

In known elevator systems mainly drives with gear or gear machines are used, which have several disadvantages compared to gearless drives.

Thus, transmission lifts achieve worse efficiencies than gearless drives and regularly have no safety brake for uncontrolled elevator movements, especially upwards. Furthermore, the transmission requires oil and regular maintenance.

For this reason, it is desirable to replace gear drives by gearless drives. However, this poses the problem that in a conventional 1: 1 ratio between the drive and the car gearless drives with considerable drive torque must be used, so that in this way an economical operation is hardly possible.

It therefore makes sense to convert the elevator system from a 1: 1 ratio to an n: 1 ratio (n = 2, 3, 4 ...). Here, however, is problematic that existing elevator shafts are hardly suitable or significant structural changes must be made. So it is necessary to make new breakthroughs that may have a retroactive effect on the statics of the entire building.

From the publication EP 1 511 683 A1 is an elevator system, in particular a traction sheave elevator with an elevator car, with a drive whose drive torque is transmitted via an n: 1 ratio on the car, a counterweight and a first guide roller on the car and a second guide roller on the counterweight known.

It is an elevator system, in particular a traction sheave elevator with an elevator car with the features of claim 1 proposed. The elevator system comprises a drive, gearless or with gear, whose drive torque is transmitted via a n: 1 ratio via a suspension element. Furthermore, a counterweight is provided. A first pulley is provided on the car and a second pulley on the counterweight. The ratio of the diameter of at least one of the deflection rollers to the thickness of the suspension element perpendicular to the axis of the traction sheave is 30: 1 or less. The pulleys have smaller diameters than the traction sheave. If the suspension element has a round cross-section, then the ratio of the diameter of the deflection roller to the diameter of the suspension element is 30: 1 or smaller.

This elevator installation is usually installed in an elevator shaft. There is thus a miniaturization in the or the pulleys, so that the old breakthroughs can be used. Further miniaturization, for example in the traction sheave, is not necessary, so that the costs can be reduced. As a material for the deflection roller on the counterweight and / or car and / or the Ableitrolle offers a metallic material, eg. Steel, gray cast iron or ferrous cast iron materials to. These rolls can be combined with rolls of synthetic material.

The machine frame is designed to be movable or adjustable so that different elevator systems can be set up with a generic frame. The adjustability takes place, for example, via a telescopic arrangement or via linearly displaceable units. The machine frame can also be arranged below the shaft ceiling. In this case, no engine room is needed. However, a machine room-less elevator is not part of the invention.

As a support means is, for example, a rope, a wire rope or a rope made of a synthetic material used. This rope can be eight or more high-speed with a diameter of 8 mm or 6 mm.

In a method according to claim 6 for installing an n: 1 elevator installation according to one of claims 1 to 5, this n: 1 elevator installation having an elevator shaft and a machine room, in the machine room on a variable machine frame a drive machine with a traction sheave and at least one Guide pulley installed. In addition, a car and a counterweight are installed in the elevator shaft, wherein in each case a deflection roller is arranged on the counterweight and on the car and thus secured. The traction sheave, the at least one deflection roller and the car and the counterweight with the pulleys are connected to provide the n: 1 suspension via at least one rope. In this case, it is provided for the at least one deflecting roller used that a ratio of a diameter of this deflecting roller to a diameter of the at least one cable is 30: 1 or smaller.

In a method according to claim 7 for converting a 1: 1 elevator system to an n: 1 elevator system according to one of claims 1 to 5, wherein n is a whole, natural number greater than or equal to 1, is in a machine room on a variable machine frame installed a drive machine with a traction sheave and at least one deflection roller. In this conversion or a corresponding modernization, a car consisting of the 1: 1 elevator system and a counterweight from an elevator shaft can continue to be used. It can only be provided that at least one deflection roller is arranged on the car and on the counterweight. The at least one deflection roller from the engine room and the deflection rollers on the car and on the counterweight are connected by providing at least one cable to provide the suspension n: 1. It is further provided that a diameter for the deflection roller on the counterweight and / or the car is selected such that a ratio of this diameter to a diameter of at least one rope 30: 1 or less, for example 25: 1, is.

Within the elevator system, the at least one cable is guided such that a first cable end is installed at an attachment point of the machine frame and thus fixed. Furthermore, this at least one rope is guided through a first breakthrough in the ceiling. Then wrapped around the at least one rope arranged on the counterweight pulley and is again guided by the first breakthrough of the ceiling upwards. Within the machine room, the rope wraps around the at least one deflection roller and the traction sheave. Thereafter, this rope is passed through a second opening in the ceiling and then wraps around the installed on the car deflecting roller and is then passed through the second opening in the ceiling again. A second end of the rope is installed at an attachment point on the machine frame and thus fixed. Accordingly, in each case a down-leading and leading up cable section of the rope is guided through a respective breakthrough.

Ratios D / d of the diameters of the pulleys installed on the car and the counterweight, respectively, to the diameter of the at least one rope are small, d. H. 30: 1 or less, for example 25: 1, 20: 1 or 15: 1. A diameter of the deflection rollers within the machine room can also be chosen larger. A ratio D / d of the diameter of the traction sheave to the rope is usually chosen 40: 1.

If the ratio D / d of the diameter of the traction sheave to the diameter of the rope greater than or equal to 40: 1, a longer life for the rope can be achieved, the entire elevator system is made more robust.

It is usually selected steel ropes with circular cross-section, which are eight or höherlitzig, therefore, the at least one rope may have at least 8 strands. Thus, special support means with additional effort of attachment are not necessary. It is thus achieved, inter alia, a minimization of a flat rope bundling for minimum breakthroughs for the at least one cable in the ceiling, which separates the engine room from the elevator shaft. In the n: 1 elevator system, which thus has a small drive torque by providing a n: 1 suspension, several thin cables and thus thin support means can be used. In addition, a diameter of the traction sheave can be chosen comparatively small, because a ratio of this diameter to the traction sheave to the at least one rope is 40: 1.

It is provided with a 2: 1 reduction only one pulley on the car and the counterweight. At higher ratios n> 2 more pulleys would have to be provided. These pulleys are in a projection screen of the car and the counterweight and thus require no additional space compared to a 1: 1 suspension.

In the case of the 1: 1 elevator system to be converted or modernized and / or a drive for the elevator system, connecting points on which ends of at least one cable were installed are now connected to the elevator car and to the counterweight when mounted on the construction site be used. Through a total provided Umbaupaket the car and the counterweight can be maintained without modification.

By providing the variable machine frame, by positioning the traction sheave and the at least one diverting pulley within the machine room, different rope outlets can be set for different widths of the cars and counterweights. When setting a distance of the at least one guide pulley within the engine room and the drive notes and the existing breakthroughs within the ceiling between the elevator shaft and the engine room are taken into account. The traction sheave drive, the at least one idler pulley within the machine room, and the suspension points for securing the at least one cable may be disposed on or on at least one common variable and vibration isolated machine frame.

In a variant of the drive or the drive machine, a relatively variable or positionable arrangement of the traction sheave and the at least one deflecting roller is provided within the machine room, wherein the at least one deflecting roller can be displaced variably to a position of the counterweight.

Another variant of the drive or the drive machine comprises an arrangement of the traction sheave with two deflection rollers formed as deflection rollers within the machine room, wherein, for example, at least one deflection roller can be displaced variably to the position of the counterweight and / or the car.

Since the existing breakthroughs in the ceiling between the engine room and the elevator shaft are used in the context of the conversion, a structural analysis within the engine room must not be re-examined.

Rotary axes of the traction sheave, the at least one deflecting rollers within the machine room and the deflecting rollers installed on the counterweight and the car can all be oriented in the same direction. This can mean for the deflection roller on the counterweight that its diameter is at most as large as a width of the counterweight, so that the deflection roller is rotated on the counterweight by 90 ° compared to conventional deflection rollers. Thus, the axis of rotation of this guide roller can be oriented parallel to a longitudinal side and thus perpendicular to a broad side of the counterweight.

Thus, at least one deflection roller on the car and / or on the counterweight has a small diameter, which means in an embodiment that the diameter of this at least one deflection roller to a diameter of at least one rope, for example 25: 1. A diameter of the at least one rope to be used is usually 8 mm.

The breakthroughs in the ceiling between the machine room and the elevator shaft depend on a configuration of the 1: 1 elevator system, which is usually square or rectangular. When converting the 1: 1 elevator system to the n: 1 elevator system, where n is an even number in design, typically 2, so that a 2: 1 elevator system is produced, a diameter of the deflection roller on the counterweight or the car can be selected in that a first cable section of the at least one cable is guided out of the machine room through the opening, which wraps around at least one deflection roller and an upwardly leading second cable section is guided again into the machine room through the same opening.

Thus, the previously existing in the 1: 1 elevator cable ropes must not be increased. Depending on the given situation, it may be provided that the diameter of a respective deflection roller on the car or the counterweight is suitably selected. In particular, for the deflection roller on the counterweight can be provided that this longitudinally rather than transversely, as arranged in a classical arrangement on the counterweight and thus fixed.

Generalized instead of steel ropes and carrier means can be selected with any, for example, non-circular cross-section. Such support means can thus also be designed as straps.

By selecting a ratio D / d of a diameter of the pulleys to ropes, a bundling of trained as ropes suspension means for minimal breakthroughs can be achieved on the ceiling. By providing a n: 1 drive with a n: 1 suspension with several thin ropes, a smaller drive torque is achieved for the rebuilt elevator installation while reducing drive costs during operation.

Due to the variable setting of the machine frame different outlets of at least one rope can be realized in different widths of cars and counterweights.

As part of the conversion, only components that show signs of wear, such as the motor and thus the drive, a controller or the ropes, are usually replaced from the 1: 1 elevator system. Other reasons for the renovation include reduced maintenance costs, improved energy efficiency and increased safety. The counterweight and car can still be used on the new n: 1 lift system. From the 1: 1 elevator system thus a usually gearless n: 1 elevator system is provided.

By providing a diameter of the traction sheave to the at least one rope of 40: 1, the at least one rope is subjected to a lower bending stress due to a bending of the at least one rope, whereby a life of the at least one rope can be increased. Up to 10 or 11 ropes can be used for the new lift system, whereby diameters of such ropes can be approx. 6 mm.

In the modernization, an existing engine room is reused. A variable, flexible adaptation to existing elevator shafts is achieved by using the variable machine frame and by providing the small pulleys on the counterweight and the car. A distance of the axes or axes of rotation of the traction sheave and the at least one deflecting roller within the machine room can be selected variably.

The at least one pulley for the car can be centrally installed on the car or be. For example, a diameter of the traction sheave may be 240 mm, so that a diameter of the at least one rope to be used is 6 mm. In another embodiment, a diameter of the traction sheave may be 320 mm, with a diameter of the at least one rope being 8 mm. In both cases, a diameter of the traction sheave to the at least one rope is 40: 1. If a deflecting roller designed as a deflection roller is used within the machine room, no counterbending change is provided for the at least one cable. If, for example, two guide rollers designed as deflection rollers are used within the machine room, a counterbending change would be required for the at least one cable.

The proposed elevator system is, for example, suitable for a so-called traction sheave elevator and comprises a car or elevator car with a counterweight. The car and the counterweight are suspended at a ratio of n: 1. A drive of the elevator system comprises a traction sheave for providing a rope traction and a motor or a prime mover with a safety brake. The drive is regularly located above an uppermost position of the car within an engine room.

Within the hoistway, the car and counterweight are guided on rails to provide vertical movement of the car and counterweight. The traction sheave, at least one deflection roller and the pulleys on the car and the counterweight are typically coaxial and guided parallel to each other, with the provided on the at least one cable or suspension rope suspension between the car and the counterweight at least one each acting on the car deflecting pulley at least 2: 1 and thus n: 1 is squat.

The ratio of the diameter of at least one pulley to the diameter of the rope is 30: 1 or smaller. The ratio of the diameter of the traction sheave to the diameter of the traction rope is 40: 1 or smaller. The rope is usually formed as an eight or higher stranded steel cable.

Furthermore, it is provided that the deflection rollers have smaller diameter than the traction sheave. The traction sheave can be arranged directly on a drive shaft of, for example, a gearless drive machine, which furthermore has a safety brake. On the car, in a variant, a single deflection roller can be arranged, which is typically arranged parallel to the traction sheave, which means that axes of rotation of the deflection roller and the traction sheave are oriented in the same direction. In addition, a single deflection roller can also be arranged on the counterweight, wherein this deflection roller is arranged transversely to a length of the counterweight. The axis of rotation of this deflection roller on the counterweight can also be oriented in the same direction as a rotational axis of the traction sheave. However, it is also possible for an axle to rotate at least one deflecting roller on the counterweight and / or the car to a rotational axis of the traction sheave and / or the at least one deflecting roller at a suitable angle, for example 90 °. The ascending and outgoing portions of the rope to at least one of the two pulleys on the car and / or the counterweight are each guided by an existing opening and thus by an existing breakthrough of a ceiling that separates the elevator shaft of the engine room. Such a breakthrough will be made even before the modernization of the n: 1 Elevator system used at the original 1: 1 lift facility.

Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

Figur 1

zeigt in schematischer Darstellung eine nicht erfindungsmässe Ausführungsform einer 1:1 Aufzuganlage.

Figur 2

zeigt eine erste Ausführungsform einer 2:1 Aufzuganlage, die nach Umbau der 1:1 Aufzuganlage aus Figur 1 bereitgestellt ist in schematischer Darstellung.

Figur 3

zeigt in schematischer Darstellung eine zweite Ausführungsform einer 2:1 Aufzuganlage, die nach Umbau der 1:1 Aufzuganlage aus Figur 1 bereitgestellt ist.

Figur 4

zeigt in schematischer Darstellung eine dritte Ausführungsform einer 2:1 Aufzuganlage aus einer ersten Perspektive.

Figur 5

zeigt die Aufzuganlage aus Figur 4 aus einer zweiten Perspektive in schematischer Darstellung.

The invention is illustrated schematically by means of embodiments in the drawings and will be described in detail below with reference to the drawings.

FIG. 1

shows a schematic representation of a non erfindungsmässe embodiment of a 1: 1 elevator system.

FIG. 2

shows a first embodiment of a 2: 1 elevator system, after the conversion of the 1: 1 elevator system FIG. 1 is provided in a schematic representation.

FIG. 3

shows a schematic representation of a second embodiment of a 2: 1 elevator system, the after conversion of the 1: 1 elevator system FIG. 1 is provided.

FIG. 4

shows a schematic representation of a third embodiment of a 2: 1 elevator system from a first perspective.

FIG. 5

shows the elevator system FIG. 4 from a second perspective in a schematic representation.

The figures are described coherently and comprehensively, the same reference numerals designate the same components.

In the FIG. 1 illustrated 1: 1 elevator installation 2 is in an upper section of FIG. 1 from a side perspective and in a lower section FIG. 1 from a projection vertically from above shown schematically.

This 1: 1 elevator installation 2 comprises a car 4 and a counterweight 6, which are arranged in an elevator shaft 8. Furthermore, the elevator installation 2 comprises a machine room 10, in which a drive machine with a traction sheave 14 and a deflection roller 16 are arranged on a machine frame 12.

The elevator shaft 8 and the machine room 10 arranged above are separated from each other by a ceiling 18. This ceiling 18 has, as a first opening, a first opening 20 and a second opening 22.

Furthermore, the elevator installation 2 comprises a suspension element designed as a cable 24. In this case, a first end of the rope is fastened to the counterweight 6 at a first attachment point 26. Furthermore, the cable 24 is guided through the first opening 20 up into the machine room 10 and wraps around there the deflection roller 16 and the traction sheave 14. Then the cable 24 is out of the engine room 10 out through the second opening 22 again in the elevator shaft 8. A second end of the cable 24 is attached to a second attachment point 28 on a ceiling of the car 4.

It is now envisaged that the 1: 1 elevator system 2 off FIG. 1 As part of a conversion and thus a modernization in a n: 1 elevator system is rebuilt. The following FIG. 2 shows a schematic representation of a first embodiment of a designed as a 2: 1 elevator system 40 n: 1 elevator system, after modernization of the 1: 1 elevator system 2 from FIG. 1 is provided.

In an upper section off FIG. 2 This 2: 1 elevator system 40 is shown from a perspective laterally to the elevator shaft 8, the machine room 10 and the ceiling 18, which separates the elevator shaft 8 and the machine room 10 from each other.

The elevator shaft 8, the machine room 10 above the hoistway 8, the ceiling 18 with the first opening 20 and the second opening 22 and the car 4 and the counterweight 6 are the same as in the 1: 1 elevator system 2 FIG. 1 and are therefore not changed during the conversion and thus during the modernization of the 1: 1 elevator system 2.

A lower section off FIG. 2 shows the 2: 1 elevator system 40 from a perspective from above in a schematic representation.

The new 2: 1 lift system 40 off FIG. 2 differs from the original 1: 1 elevator installation 2 by a variable machine frame 42 with a new drive machine 44, which is designed to move a traction sheave 46. In addition, the new 2: 1 elevator system 40 within the engine room 10 includes a diverting pulley 48.

At the first attachment point 26 on the counterweight, a first deflection roller 50 is now arranged and thus fastened. At the second attachment point 28 on the car 4 is arranged a second pulley 52 and thus secured. Furthermore, the new 2: 1 elevator installation 40 comprises at least one propellant designed as a cable 54.

It is envisaged that a diameter of the traction sheave 46 to a diameter of the at least one cable 54 in the basis of FIG. 2 described first embodiment of the 2: 1 elevator system 40 40: 1. A diameter of the two pulleys 50, 52 to the cable 54 is 25: 1 in the present embodiment. A diameter of at least one of the two deflection rollers 50, 52 to a diameter of the at least one cable 54 is typically 30: 1 or smaller. In this case, such a ratio of the diameters of the deflection rollers 50, 52 to the at least one cable 54 is to be selected such that both an outgoing and a tapering section of the at least one cable 54 within the 2: 1 elevator installation 40 are each penetrated by an opening, 20, 22 is guided within the ceiling 18.

A double arrow 41 denotes a distance between the cable 54 and the counterweight 6. This distance 41 is dependent on the configuration of the elevator installation 40. With a variable machine frame 42, different distances 41 can be realized.

In the first embodiment of the 2: 1 elevator system 40, a first end of the at least one cable is attached to the machine frame 42 at a first attachment point 56. Starting from this first attachment point 56, this at least one cable 54 is guided downwards through the first opening 20 of the cover 18 and wraps around the first deflection roller 50, which is fastened to the counterweight 6. Furthermore, the at least one cable 54 is guided through the same first opening 20 of the cover 18 and wraps around the deflection roller 48 and subsequently the traction sheave 46 At least one cable 54 is guided, starting from the traction sheave 46 through the second opening 22 of the cover 18, out of the machine room 10 down into the hoistway 8 and wraps around the second guide roller 52, which is fastened to the car 4. Starting from the second deflection roller 52, the at least one cable is guided again through the second opening 22 within the ceiling 18 into the machine room 10. A second end of the at least one cable 54 is attached to the machine frame 42 at a second attachment point 58.

The first deflection roller 50 on the counterweight 6 is arranged transversely on this counterweight. Overall, it is provided that axes of rotation of the two deflection rollers 50, 52 and axes of rotation of the traction sheave 46 and the deflection roller 48 are oriented in the same direction within the first embodiment of the 2: 1 elevator system 40.

The illustration shows a relative to a door opening 43 laterally provided counterweight 6. This can of course also be provided behind.

FIG. 3 shows a schematic representation of a second embodiment of a n: 1 elevator system, which is designed here as a 2: 1 elevator system 70 and after conversion of the basis of FIG. 1 featured 1: 1 elevator system is provided, from two perspectives.

Again, the elevator shaft 8, the engine room 10, the ceiling 18 with the first opening 20 and the second opening 22 and continue the car 4 and the counterweight 6 are taken from the original 1: 1 elevator system 2.

Since it is provided in the present embodiment that the original 1: 1 elevator installation 2 can be modernized according to the modular principle, the second embodiment of the 2: 1 elevator installation 70 has substantially the same components as those already described with reference to FIG FIG. 2 presented first embodiment of the 2: 1 elevator system 40.

Thus, this second elevator installation 70 also includes within the machine room 10 a variable machine frame 42 with a drive machine 44 which is designed to move a traction sheave 46, a first attachment point 56 and a second attachment point 58 for one end of at least one suspension element configured as a cable 54. Furthermore, a first deflection roller 48 and also a second deflection roller 72 are arranged on the variable machine frame 42.

Thus, the second embodiment of the 2: 1 elevator installation 70 differs FIG. 3 from the first embodiment of the 2: 1 elevator system 40 FIG. 2 in that it now has two deflection rollers 48, 72. As a result, the two attachment points 56, 58 for the ends of the at least one cable 54 and the prime mover 44 with the traction sheave 46 are positioned differently on the variable machine frame 42 of the second embodiment of the 2: 1 elevator system 70 than in the variable one Machine frame 42 of the first embodiment of the 2: 1 elevator system 40 is the case.

As with the first embodiment, it is also provided in the second embodiment of the 2: 1 elevator system 70 that a diameter of the traction sheave 46 to a diameter of the rope 54 is 40: 1. A diameter of a respective deflection roller 50, 52 on the counterweight 6 and the car 4 to a diameter of the at least one cable 54 in the second embodiment of the 2: 1 elevator system 70 is 25: 1.

Depending on the width of the openings 20, 22 within the ceiling 18, which remain unchanged from the 1: 1 elevator installation 2, a ratio of the diameters of the deflection rollers 50, 52 to a diameter of at least one cable 54 is 30: 1 or less.

Similar to the first embodiment of the 2: 1 elevator system 40 FIG. 2 the first end of the at least one cable 50 is attached to the first attachment point 56 of the variable machine frame 42 and led down therefrom through the first opening 20 of the cover 18 from the machine room 10 into the elevator shaft 8. There, the at least one cable 54 wraps around the first guide roller 50, which is secured transversely to the counterweight. Thereafter, the at least one cable is guided from below through the first opening 20 back into the machine room 10 and wraps around there the second deflecting roller 72, the traction sheave 46 and the first deflecting roller 48. Starting from the first deflecting roller 48, the at least one cable 54 through the second breakthrough 22 of the ceiling 18 is guided down into the elevator shaft and wraps around there the second guide roller 52 which is arranged on the ceiling of the car 4. Then, the at least one cable 54 is again guided upwards and again traverses the second opening 22 of the ceiling 18. The second end of the at least one cable 54 is fastened to the variable machine frame 42 at the second attachment point 58.

In both embodiments of the 2: 1 elevator systems 40, 70 it is provided that a ratio of the diameters of the deflection rollers 50, 52 to a diameter of the at least one cable 54 is 30: 1 or smaller. In the two present Embodiments is selected for the ratios of the diameter in each case a value of 25: 1. This makes it possible that in each case a downwardly leading and an upwardly leading portion of the rope and thus in each case a cable section which is wrapped within the elevator shaft 8 one of the two guide rollers 50, 52 through one and the same opening 20, 22 is guided. Thus, it is possible that the already existing at the original 1: 1 elevator installation 2 within the ceiling 18 openings 20, 22 after the modernization of the 1: 1 elevator system 2 can be adopted unchanged.

After conversion of this original 1: 1 elevator system to one of the two described new 2: 1 elevator systems 40, 70, an enlargement of the openings 20, 22 is not required. In addition, no additional openings in the ceiling 18 to drill. Because the new machine frames 42 are variably adjustable, the new elevator systems 40, 72 can be flexibly adapted to a dimensioning of the car 4 and the counterweight 6 and a spacing of the two openings 20, 22.

The in the FIGS. 4 and 5 schematically illustrated third embodiment of a 2: 1 elevator installation 80 includes a variable machine frame 82 which is disposed within an engine room 84 within the elevator installation 80. An elevator shaft, with counterweight and car are in the FIGS. 4 and 5 not shown further. In the FIGS. 4 and 5 only a first opening 86 and a second opening 88 of a ceiling not shown between the engine room 84 and the elevator shaft are shown schematically, while this ceiling separates the engine room from the elevator shaft.

On the variable machine frame 82, a drive machine 90 is arranged with a drive shaft, wherein on the drive shaft of the drive machine 90, a traction sheave 92 is arranged to provide a rope traction. In addition, a deflecting roller 94 is arranged on the machine frame 82. Ropes 96, here only a rope 96 is shown, are provided for transmitting a rotational movement of the traction sheave 92 on the counterweight and the car, so that the counterweight and the car can perform vertical movements within the hoistway.

Furthermore, first ends 98 of the cables 96 are disposed at first attachment points 100 on the machine frame 88. Furthermore, second attachment points 102 are provided on which second ends of the cables 96 are arranged on the variable machine frame 82.

The in the FIGS. 4 and 5 shown third embodiment of the 2: 1 elevator system 80 is provided after modernization of an original 1: 1 elevator system. It is envisaged that the ceiling and the counterweight and the car of the original 1: 1 lift system will be taken over unchanged. The two passages 86, 88 inside the ceiling are passed through the ropes in the 1: 1 suspension of the original 1: 1 elevator system, are taken over unchanged in the new 2: 1 elevator system 80.

For the provided with the new 2: 1 elevator installation 80 2: 1 suspension of the ropes 96 is provided that a first downwardly leading cable section 104 each a cable 96 is guided at a first attachment point 100 through the first opening 86 and within the elevator shaft on the Wrapped counterweight arranged idler pulley. As the first leading up cable section 106 of the rope 96 is this rope 96 passes through the first passage 86 back into the machine room 84 and wraps around the deflection roller 94. Furthermore, the cable 96 wraps around the traction sheave 92. A second descending cable section 110 is guided through the second passage 88 and wraps around a second deflection roller within the elevator shaft , which is arranged on the car. A second upwardly leading cable section 112 of the cable 96 is again passed through the second passageway 88 such that one end of the second upwardly leading cable section 112 and thus a second end of the cable 96 is secured to the variable machine frame 82 at one of the second attachment points 102.

In particular from FIG. 5 It will be appreciated that beams 114 of the variable machine frame 88 have a number of screw openings that allow the prime mover 90 and at least the second attachment points 102 to be positioned and fastened with screws as desired along these struts. Thus, as part of the modernization of the original 1: 1 elevator system, providing the new 2: 1 elevator system 80, it is possible to use the existing openings 86, 88 unchanged. Appropriate positioning of the descending cable sections 104, 110 as well as the ascending cable sections 108, 112 can be flexibly set by positioning the drive machine 90 and the second attachment points 102.

It is provided in the illustrated embodiment that a ratio of a diameter of the traction sheave 92 to a ratio of a diameter of a rope 96 is 40: 1. A diameter of the in the FIGS. 4 and 5 Not shown deflection rollers on the counterweight and the car to a diameter of a respective cable 96 is less than or equal to 30: 1, for example 25: 1.

Claims (7)

1. Elevator system (40, 70, 80), comprising an elevator car (4), comprising a machine room (10, 84) in which on a variable machine frame (42, 82) a drive machine (44, 90) and at least one deflection roller (48, 72, 94) are provided, the drive machine (44, 90) having a traction sheave (46, 92), wherein the drive moment of the drive machine is transferred via a carrier means to the elevator car (4) in a ratio of n:1, and comprising a counterweight (6) and a first deflecting roller (52) on the elevator car (4), and a second deflecting roller (50) on the counterweight (6), characterized in that the ratio between the diameter of at least one of the deflecting rollers (50, 52) and the thickness of the carrier means (54, 96) perpendicular to the axis of the traction sheave (46, 92) is 30:1 or less so that a pulled-out portion as well as a pulled-in portion of the carrier means is guided through a respective aperture (20, 22, 86, 88) within a ceiling (18), wherein the deflecting rollers (50, 52) have smaller diameters than the traction sheave (46, 92).
2. Elevator system according to Claim 1, wherein the carrier means is a rope (54, 96).
3. Elevator system according to Claim 1 or 2, wherein the ratio for both deflecting rollers (50, 52) is 30:1.
4. Elevator system according to one of Claims 1 to 3, wherein the second deflecting roller (50) is arranged transversely on the counterweight (6).
5. Elevator system according to one of Claims 1 to 4, wherein the ratio of the traction sheave (46, 92) is 40:1 or less.
6. Method of installing an n:1 elevator system (40, 70, 80) according to any one of Claims 1 to 5 having an elevator shaft (8) and a machine room (10, 84), wherein a drive machine (44, 90) having a traction sheave (46, 92) and at least one deflection roller (48, 72, 94) are installed at a variable machine frame (42, 82) in the machine room (10, 84), and wherein an elevator car (4) and a counterweight (6) are installed in the elevator shaft (8), wherein a respective deflecting roller (50, 52) is arranged at the elevator car (4) and the counterweight (6), wherein the traction sheave (46, 92), the at least one deflection roller (48, 72, 94) and the deflecting rollers (50, 52) of the elevator car (4) and the counterweight (6) are connected via at least one carrier means providing a n:1 suspension, and wherein a horizontal distance between the elevator car (4) and the counterweight (6) is adjusted by adjusting the variable machine frame (42, 82) by varying the distance between the traction sheave (46, 92) and the at least one deflecting roller (50, 52), wherein at least one rope (54, 96) serves as carrier means, wherein a ratio between the diameter of at least one of both deflecting rollers (50, 52) and the diameter of the at least one rope (54, 96) is 30:1 or less, so that a pulled-out portion as well as a pulled-in portion of the at least one rope (54, 96) is guided through a respective aperture (20, 22, 86, 88) within a ceiling (18).
7. Method of modifying an 1:1 elevator system (2) to an n:1 elevator system (40, 70, 80) according to any one of Claims 1 to 5, wherein a drive machine (44, 90) having a traction sheave (46, 92) and at least one deflection roller (48, 72, 94) are installed at a variable machine frame (42, 82) in the machine room (10, 84), and wherein an elevator car (4) and a counterweight (6) from an elevator shaft (8) of the 1:1 elevator system (2) are used, wherein a respective deflecting roller (50, 52) is arranged at the elevator car (4) and the counterweight (6), wherein the traction sheave (46, 92), the at least one deflection roller (48, 72, 94) and the deflecting rollers (50, 52) of the elevator car (4) and the counterweight (6) are connected via at least one carrier means providing a 2:1 suspension, and wherein a horizontal distance between the elevator car (4) and the counterweight (6) is adjusted by adjusting the variable machine frame (42, 82) by varying the distance between the traction sheave (46, 92) and the at least one deflecting roller (50, 52), wherein at least one rope (54, 96) serves as carrier means, wherein the ratio between the diameter of at least one of both deflecting rollers (50, 52) and the diameter of the at least one rope (54, 96) is 30:1 or less, so that a pulled-out portion as well as a pulled-in portion of the at least one rope (54, 96) is guided through a respective aperture (20, 22, 86, 88) within a ceiling (18).

Images