EP1142815B1 - Mechanical tie-down apparatus for elevator cable - Google Patents

Mechanical tie-down apparatus for elevator cable Download PDF

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Publication number
EP1142815B1
EP1142815B1 EP20010106665 EP01106665A EP1142815B1 EP 1142815 B1 EP1142815 B1 EP 1142815B1 EP 20010106665 EP20010106665 EP 20010106665 EP 01106665 A EP01106665 A EP 01106665A EP 1142815 B1 EP1142815 B1 EP 1142815B1
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EP
European Patent Office
Prior art keywords
pulleys
elevator
tie
tensioning
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20010106665
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German (de)
French (fr)
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EP1142815A1 (en
Inventor
Ernst Ach
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Inventio AG
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Inventio AG
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Filing date
Publication date
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Priority to EP20010106665 priority Critical patent/EP1142815B1/en
Publication of EP1142815A1 publication Critical patent/EP1142815A1/en
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Publication of EP1142815B1 publication Critical patent/EP1142815B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B66B7/10—Arrangements of ropes or cables for equalising rope or cable tension

Definitions

  • the invention relates to a clamping device for at least one sub-cable according to the preamble of patent claim 1.
  • vertical and horizontal refer to the direction of travel of the elevator.
  • vertical is meant the direction substantially parallel to the direction of travel of the elevator, and by “horizontal” is meant the direction substantially perpendicular thereto.
  • Lower cable tensioning devices have long been known and are preferably used in traction elevators. They should, among other things, tension the lower ropes, keep the rope vibrations low and prevent the jumping of the counterweight or the elevator car.
  • the sub-rope tensioning device is provided with a single large pulley.
  • a disadvantage of this pulley is the large space requirement in the warehouse and their non-standardization, since it is always individually to produce depending on the size of the elevator installation.
  • the document JP-A-09156850 shows two tension rollers, which are arranged offset.
  • the sub-rope tensioning device known in this Embodiment, provided with two rollers with minimum allowable diameter.
  • the high speeds of the pulleys which increase the bearing noise and the use of multiple ropes with a small rope diameter.
  • the invention has for its object to provide a clamping device for at least one sub-cable, which does not have the above-mentioned disadvantages and allows the use of large low-noise idlers and large sub-diameters.
  • Another advantage is the fact that relatively large standardized tension rollers can be used.
  • Fig. 1 an elevator car 1 and a counterweight 2 can be seen, which are guided in a shaft 3 by means not shown guides and are connected to each other by at least one sub-cable 4 via a tensioning device 5.
  • the tensioning device 5 has two tension rollers 6, whose axes 7 lie on a common plane.
  • the lower cable 4 is fixed on the cabin side to a first suspension point 8 of the cabin frame 9, which coincides substantially with the middle of the width of the cabin floor.
  • Counterweight side the lower cable 4 is fixed to a second suspension point 10 of the counterweight frame 11, which coincides substantially with the center of the width of the counterweight floor.
  • the lower cable 4 can be fastened directly or indirectly, for example by means of springs, to the cabin frame 9 or to the counterweight frame 11.
  • the tension rollers 6 have diameters D1 and D2, which are the same length.
  • the horizontal distance TU, between the first suspension point 8 and the second suspension point 10, referred to below as the sub-cable distance TU, is greater than the sum of the two diameters D1 and D2.
  • the two tension rollers 6 are mounted in a roller frame 12 which is vertically movable in a guide 14 fixed to the shaft bottom 13.
  • the tension rollers are quite small. Due to the predetermined Unterseilabstandes TU can the sum of the diameters D1 and D2 should not be greater than the sub-wire spacing TU. The smaller the tension roller diameter, the higher the number of revolutions per distance unit of the elevator. The relatively small tension rollers 6 thus have a high speed, which leads to disturbing bearing noise. At the same time only small sub-diameters can be used in large numbers.
  • FIG. 2 an embodiment according to the invention is shown, in which, under the same conditions as in the prior art, larger tension rollers can be used.
  • FIG. 2 be the same elements of the elevator with the same reference numerals as in Fig. 1 designated.
  • the tension rollers 6 are arranged in a roller frame 12.
  • the roller frame 12 is generally a supporting structure for the tension rollers 6, which may be formed as a housing 12, for example.
  • the roller frame 12 is vertically movable in a guide 14 attached to the shaft bottom 13.
  • the tension rollers 6 are arranged offset in height relative to the shaft bottom.
  • the height-offset tension rollers 6 have in this embodiment of equal diameter D1 and D2, the sum of which is greater than the sub-cable distance TU.
  • the length L of the vertical projection of the two tension rollers 6 on a horizontal plane substantially corresponds to the Unterseilabstand TU, that is, the tension rollers 6 extend in the horizontal direction over a length L, which is substantially the Sub-rope distance TU is the same.
  • tension rollers 5 allows the use of larger tension rollers than in the prior art.
  • the number of revolutions per route unit becomes smaller, resulting in a Lagerge Hurchverminderung. It can be larger sub-diameters and thus less sub-cables 4 are used.
  • the tension rollers 6 can be standardized to use them, thanks to the flexible arrangement according to the invention, to different elevator systems.
  • the tension rollers are connected to each other by means that allow mutual adjustment of the tension rollers in the linear direction and / or in the direction of rotation.
  • the distance between the axes of the two tension rollers and / or the spatial arrangement of the rollers is mutually adjustable.
  • the housing 12 is provided with a plurality of holes 15, which allows the fixing of the idler rollers in different positions.
  • the fixations can usually be done with the help of fasteners such as screws. In this way, the adaptability of the tension rollers to the various elevator systems is increased.

Description

Die Erfindung betrifft eine Spannvorrichtung für mindestens ein Unterseil nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a clamping device for at least one sub-cable according to the preamble of patent claim 1.

Unter Unterseil im Sinne der Erfindung sind auch Ausgleichseile, Ausgleichketten oder dergleichen zu verstehen.Unterseil in the context of the invention also balancing cables, balancing chains or the like are to be understood.

In dieser Erfindung beziehen sich die Begriffe "vertikal" und "horizontal" auf die Fahrrichtung des Aufzuges. Mit "vertikal" ist die Richtung im wesentlichen parallel zur Fahrrichtung des Aufzuges gemeint und mit "horizontal" ist die dazu im wesentlichen senkrechte Richtung gemeint.In this invention, the terms "vertical" and "horizontal" refer to the direction of travel of the elevator. By "vertical" is meant the direction substantially parallel to the direction of travel of the elevator, and by "horizontal" is meant the direction substantially perpendicular thereto.

Unterseilspannvorrichtungen sind seit langem bekannt und werden vorzugsweise in Traktionsaufzügen eingesetzt. Sie sollen unter anderem die Unterseile spannen, die Seilschwingungen gering halten und das Springen des Gegengewichts oder der Aufzugskabine verhindern.Lower cable tensioning devices have long been known and are preferably used in traction elevators. They should, among other things, tension the lower ropes, keep the rope vibrations low and prevent the jumping of the counterweight or the elevator car.

Bei der bekannten Schrift DE 4334253 , ist die Unterseilspannvorrichtung mit einer einzigen grossen Seilrolle versehen. Nachteilig bei dieser Seilrolle ist der grosse Platzbedarf im Lager und ihre nicht Standardisierung, da sie immer in Abhängigkeit der Grösse der Aufzugsanlage einzeln herzustellen ist. Das Dokument JP-A-09156850 zeigt zwei Spannrollen, die versetzt angeordnet sind. Wie aus der Schrift DT 2425216 ersichtlich ist, ist die Unterseilspannvorrichtung, in dieser bekannten Ausführungsform, mit zwei Rollen mit minimal zulässigen Durchmesser versehen. Nachteilig bei dieser Ausführungsform sind die hohen Drehzahlen der Seilrollen, die die Lagergeräusche erhöhen und die Verwendung von mehreren Seilen mit kleinem Seildurchmesser.In the known font DE 4334253 , the sub-rope tensioning device is provided with a single large pulley. A disadvantage of this pulley is the large space requirement in the warehouse and their non-standardization, since it is always individually to produce depending on the size of the elevator installation. The document JP-A-09156850 shows two tension rollers, which are arranged offset. As can be seen from the document DT 2425216, the sub-rope tensioning device, known in this Embodiment, provided with two rollers with minimum allowable diameter. A disadvantage of this embodiment, the high speeds of the pulleys, which increase the bearing noise and the use of multiple ropes with a small rope diameter.

Der Erfindung liegt die Aufgabe zugrunde eine Spannvorrichtung für mindestens ein Unterseil zu schaffen, die die obenerwähnten Nachteile nicht aufweist und die Verwendung grosser geräuscharmer Spannrollen sowie grosser Unterseildurchmesser ermöglicht.The invention has for its object to provide a clamping device for at least one sub-cable, which does not have the above-mentioned disadvantages and allows the use of large low-noise idlers and large sub-diameters.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Durch die in den abhängigen Ansprüchen aufgeführten Massnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Spannvorrichtung möglich.The measures listed in the dependent claims advantageous refinements and improvements of the claim 1 clamping device are possible.

Ein weiterer Vorteil ist darin zu sehen, dass relativ grosse standardisierte Spannrollen verwendet werden können.Another advantage is the fact that relatively large standardized tension rollers can be used.

Alle erläuterten Merkmale sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar, ohne den Rahmen der Erfindung zu verlassen.All features explained are not only in the particular combination specified, but also in other combinations or alone, without departing from the scope of the invention.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert und in den schematischen Zeichnungen dargestellt. Es zeigen:

  • Fig. 1 den unteren Teil einer Aufzugsanlage mit einer Spannvorrichtung gemäss Stand der Technik,
  • Fig. 2 den unteren Teil einer Aufzugsanlage mit einer Spannvorrichtung gemäss einer Ausführungsform der Erfindung.
The invention will be explained in more detail below with reference to an embodiment and illustrated in the schematic drawings. Show it:
  • Fig. 1 the lower part of an elevator installation with a tensioning device according to the prior art,
  • Fig. 2 the lower part of an elevator installation with a tensioning device according to an embodiment of the invention.

In Fig. 1 ist eine Aufzugskabine 1 und ein Gegengewicht 2 ersichtlich, die in einem Schacht 3 mittels nichtgezeigten Führungen geführt sind und miteinander durch mindestens ein Unterseil 4 über eine Spannvorrichtung 5 verbunden sind. Die Spannvorrichtung 5 weist zwei Spannrollen 6 auf, deren Achsen 7 auf einer gemeinsamen Ebene liegen. Das Unterseil 4 ist kabinenseitig an einem ersten Aufhängepunkt 8 des Kabinenrahmens 9 fixiert, der im wesentlichen mit der Mitte der Breite des Kabinenbodens übereinstimmt. Gegengewichtseitig ist das Unterseil 4 an einem zweiten Aufhängepunkt 10 des Gegengewichtsrahmens 11 fixiert, der im wesentlichen mit der Mitte der Breite des Gegengewichtsbodens übereinstimmt. Das Unterseil 4 kann direkt oder indirekt, beispielsweise mit Hilfe von Federn, an dem Kabinenrahmen 9 bzw. an dem Gegengewichtsrahmen 11 befestigt werden. Die Spannrollen 6 weisen Durchmesser D1 bzw. D2 auf, die gleichlang sind. Der horizontale Abstand TU, zwischen dem ersten Aufhängepunkt 8 und dem zweiten Aufhängepunkt 10, im folgenden Unterseilabstand TU genannt, ist grösser als die Summe der beiden Durchmesser D1 und D2. Die zwei Spannrollen 6 sind in einem Rollenrahmen 12 montiert, der in einer am Schachtboden 13 befestigten Führung 14 vertikal beweglich ist.In Fig. 1 an elevator car 1 and a counterweight 2 can be seen, which are guided in a shaft 3 by means not shown guides and are connected to each other by at least one sub-cable 4 via a tensioning device 5. The tensioning device 5 has two tension rollers 6, whose axes 7 lie on a common plane. The lower cable 4 is fixed on the cabin side to a first suspension point 8 of the cabin frame 9, which coincides substantially with the middle of the width of the cabin floor. Counterweight side, the lower cable 4 is fixed to a second suspension point 10 of the counterweight frame 11, which coincides substantially with the center of the width of the counterweight floor. The lower cable 4 can be fastened directly or indirectly, for example by means of springs, to the cabin frame 9 or to the counterweight frame 11. The tension rollers 6 have diameters D1 and D2, which are the same length. The horizontal distance TU, between the first suspension point 8 and the second suspension point 10, referred to below as the sub-cable distance TU, is greater than the sum of the two diameters D1 and D2. The two tension rollers 6 are mounted in a roller frame 12 which is vertically movable in a guide 14 fixed to the shaft bottom 13.

In dieser bekannten Lösung sind die Spannrollen ziemlich klein. Aufgrund des vorbestimmten Unterseilabstandes TU kann die Summe der Durchmesser D1 und D2 nicht grösser als der Unterseilabstand TU sein. Je kleiner der Spannrollendurchmesser ist, desto höher ist die Zahl Umdrehungen pro Fahrstreckeneinheit des Aufzuges. Die relativ kleinen Spannrollen 6 haben somit eine hohe Drehzahl, was zu störenden Lagergeräuschen führt. Gleichzeitig können nur kleine Unterseildurchmesser in grosser Anzahl verwendet werden.In this known solution, the tension rollers are quite small. Due to the predetermined Unterseilabstandes TU can the sum of the diameters D1 and D2 should not be greater than the sub-wire spacing TU. The smaller the tension roller diameter, the higher the number of revolutions per distance unit of the elevator. The relatively small tension rollers 6 thus have a high speed, which leads to disturbing bearing noise. At the same time only small sub-diameters can be used in large numbers.

In Fig. 2 ist eine Ausführungsform gemäss der Erfindung dargestellt, bei der, bei gleichen Bedingungen wie im Stand der Technik, grössere Spannrollen verwenden werden können. In Figur 2 werden die gleichen Elemente des Aufzuges mit den gleichen Bezugszeichen wie in Fig. 1 bezeichnet. Der Einfachheit halber wird nur ein Unterseil 4 dargestellt. Selbstverständlich gilt das gleiche auch wenn mehrere Unterseile verwendet werden. Wie aus Figur 2 ersichtlich ist, sind die Spannrollen 6 in einem Rollenrahmen 12 angeordnet. Der Rollenrahmen 12 ist im allgemeinen eine tragende Struktur für die Spannrollen 6, die beispielsweise als Gehäuse 12 ausgebildet sein kann. Der Rollenrahmen 12 ist in einer am Schachtboden 13 befestigten Führung 14 vertikal beweglich. Die Spannrollen 6 sind in der Höhe bezüglich des Schachtbodens versetzt angeordnet. Die höhenversetzten Spannrollen 6 weisen in dieser Ausführungsform gleichgrosse Durchmesser D1 und D2 auf, deren Summe grösser als der Unterseilabstand TU ist. Vorzugsweise entspricht die Länge L der vertikalen Projektion der beiden Spannrollen 6 auf einer horizontalen Ebene im wesentlichen dem Unterseilabstand TU, das heisst die Spannrollen 6 erstrecken sich in die horizontale Richtung über eine Länge L, die im wesentlichen dem Unterseilabstand TU gleich ist. Mit der erfindungsgemässen Spannvorrichtung wird erreicht, dass das Unterseil 4 im Bereich zwischen Kabine 1 und der ihr gegenüber nächstliegenden Spannrolle 6 und im Bereich zwischen Gegengewicht 2 und der ihm gegenüber nächstliegenden Spannrolle 4 parallel verläuft.In Fig. 2 an embodiment according to the invention is shown, in which, under the same conditions as in the prior art, larger tension rollers can be used. In FIG. 2 be the same elements of the elevator with the same reference numerals as in Fig. 1 designated. For the sake of simplicity, only one sub-cable 4 is shown. Of course, the same applies even if several sub-ropes are used. How out FIG. 2 it can be seen, the tension rollers 6 are arranged in a roller frame 12. The roller frame 12 is generally a supporting structure for the tension rollers 6, which may be formed as a housing 12, for example. The roller frame 12 is vertically movable in a guide 14 attached to the shaft bottom 13. The tension rollers 6 are arranged offset in height relative to the shaft bottom. The height-offset tension rollers 6 have in this embodiment of equal diameter D1 and D2, the sum of which is greater than the sub-cable distance TU. Preferably, the length L of the vertical projection of the two tension rollers 6 on a horizontal plane substantially corresponds to the Unterseilabstand TU, that is, the tension rollers 6 extend in the horizontal direction over a length L, which is substantially the Sub-rope distance TU is the same. With the tensioning device according to the invention, it is achieved that the lower cable 4 runs parallel in the area between the car 1 and the closest tensioning roller 6 and in the area between the counterweight 2 and the closest tensioning roller 4.

Diese spezielle Anordnung der Spannrollen 5 ermöglicht die Verwendung von grösseren Spannrollen als im Stand der Technik. Somit wird die Zahl der Umdrehungen pro Fahrstreckeneinheit kleiner, was zu einer Lagergeräuchverminderung führt. Es können grössere Unterseildurchmesser und damit weniger Unterseile 4 verwendet werden. Im übrigen können die Spannrollen 6 standardisiert werden, um sie, dank der flexiblen Anordnung gemäss der Erfindung, an verschiedene Aufzugsanlagen zu verwenden.This special arrangement of the tension rollers 5 allows the use of larger tension rollers than in the prior art. Thus, the number of revolutions per route unit becomes smaller, resulting in a Lagergeräuchverminderung. It can be larger sub-diameters and thus less sub-cables 4 are used. Moreover, the tension rollers 6 can be standardized to use them, thanks to the flexible arrangement according to the invention, to different elevator systems.

Die Spannrollen sind miteinander durch Mittel verbunden, die eine gegenseitige Verstellung der Spannrollen in linearer Richtung und/oder in Drehrichtung erlauben. In anderen Worten ist der Achsenabstand der beiden Spannrollen und/oder die räumliche Anordnung der Rollen zueinander verstellbar. Dies wird dadurch erzielt, dass das Gehäuse 12 mit mehreren Löcher 15 versehen ist, die die Fixierung der Spannrollenachsen in verschiedenen Positionen erlaubt. Die Fixierungen können üblicherweise mit Hilfe von Befestigungsmitteln wie Schrauben erfolgen. In dieser Weise wird die Anpassungsfähigkeit der Spannrollen an die verschiedenen Aufzugsanlagen erhöht.The tension rollers are connected to each other by means that allow mutual adjustment of the tension rollers in the linear direction and / or in the direction of rotation. In other words, the distance between the axes of the two tension rollers and / or the spatial arrangement of the rollers is mutually adjustable. This is achieved in that the housing 12 is provided with a plurality of holes 15, which allows the fixing of the idler rollers in different positions. The fixations can usually be done with the help of fasteners such as screws. In this way, the adaptability of the tension rollers to the various elevator systems is increased.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Aufzugskabinecar
22
Gegengewichtcounterweight
33
Aufzugsschachtelevator shaft
44
Unterseillower cable
55
Spannvorrichtungjig
66
Spannrolleidler
77
SpannrollenachseIdler axle
88th
erster Aufhägepunktfirst suspension point
99
Kabinenrahmencar frame
1010
zweiter Aufhägepunktsecond suspension point
1111
GegengewichtsrahmenCounterweight frame
1212
Rollenrahmen / GehäuseRoller frame / housing
1313
Schachtbodenshaft bottom
1414
Spannvorrichtung-FührungJig-guide
1515
Loch im GehäuseHole in the housing
TUTU
UnterseilabstandRope separation
D1D1
SpannrollendurchmesserIdler pulley diameter
D2D2
SpannrollendurchmesserIdler pulley diameter
LL
Länge der vertikalen Projektion der SpannrollenLength of vertical projection of the tension rollers

Claims (6)

  1. Elevator with tie-down apparatus for at least one elevator cable, which connects a car (1) and a counterweight (2) of the elevator traveling in a hoistway (3), the tie-down apparatus (5) having two tensioning pulleys (6), the two tensioning pulleys (6) being arranged offset in relation to a vertical and a horizontal,
    characterized in that
    the two tie-down pulleys (6) are arranged in a housing (12), the housing being provided with several holes (15) that serve to fix the tie-down pulley axles (7) of the tie-down pulleys (6) so that the distance between the axles of the two tie-down pulleys (6), and or the spatial arrangement of the pulleys relative to each other, is adjustable.
  2. Elevator according to Patent Claim 1,
    characterized in that
    the tensioning pulleys (6) have diameters (D1, D2) that are so dimensioned that the sum of the two tensioning pulley diameters (D1, D2) is greater than a pre-determined horizontal distance (TU) between a first hitch point (8) of the elevator cable (4) on the car (1) and a second hitch point (10) of the elevator cable (4) on the counterweight (2) .
  3. Elevator according to one of the foregoing patent claims,
    characterized in that
    the two tensioning pulleys (6) have the same diameter (D1, D2) .
  4. Elevator according to one of the foregoing patent claims,
    characterized in that
    the two tensioning pulleys (6) are so arranged relative to each other that the length (L) of the vertical projection of the two tensioning pulleys (6) onto the horizontal corresponds essentially to the horizontal distance (TU).
  5. Elevator according to one of the foregoing patent claims,
    characterized in that
    the housing (12) is vertically movable in a guide (14) that is fastened to the floor (13) of the hoistway (3).
  6. Elevator according to one of the foregoing patent claims,
    characterized in that
    the two tensioning pulleys (6) can be moved relative to each other.
EP20010106665 2000-03-31 2001-03-16 Mechanical tie-down apparatus for elevator cable Expired - Lifetime EP1142815B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20010106665 EP1142815B1 (en) 2000-03-31 2001-03-16 Mechanical tie-down apparatus for elevator cable

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP00810280 2000-03-31
EP00810280 2000-03-31
EP20010106665 EP1142815B1 (en) 2000-03-31 2001-03-16 Mechanical tie-down apparatus for elevator cable

Publications (2)

Publication Number Publication Date
EP1142815A1 EP1142815A1 (en) 2001-10-10
EP1142815B1 true EP1142815B1 (en) 2008-12-03

Family

ID=26073839

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Application Number Title Priority Date Filing Date
EP20010106665 Expired - Lifetime EP1142815B1 (en) 2000-03-31 2001-03-16 Mechanical tie-down apparatus for elevator cable

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014104047A1 (en) 2014-03-21 2015-09-24 Thyssenkrupp Elevator Ag Elevator with sub-rope tensioning device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3070043A1 (en) * 2015-03-18 2016-09-21 Inventio AG Clamping device in elevator installations
DE202020104314U1 (en) 2020-07-27 2021-08-02 Elgo Batscale Ag Device for wear detection for elevator systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2639929B1 (en) * 1988-12-01 1991-03-29 Otis Elevator Co SUPPORT BEAM FOR PULLEYS OF LIFT TRACTION CABLES
US4949815A (en) * 1989-06-08 1990-08-21 Otis Elevator Company Sheave array of a self propelled elevator using a linear motor on the counterweight
JPH06211463A (en) * 1993-01-18 1994-08-02 Hitachi Ltd Elevator device
JPH09156850A (en) * 1995-12-05 1997-06-17 Mitsubishi Denki Bill Techno Service Kk Braking device for elevator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014104047A1 (en) 2014-03-21 2015-09-24 Thyssenkrupp Elevator Ag Elevator with sub-rope tensioning device

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