EP0731209A1 - Device for detecting the end of service life for synthetic fibre ropes - Google Patents

Device for detecting the end of service life for synthetic fibre ropes Download PDF

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Publication number
EP0731209A1
EP0731209A1 EP96103183A EP96103183A EP0731209A1 EP 0731209 A1 EP0731209 A1 EP 0731209A1 EP 96103183 A EP96103183 A EP 96103183A EP 96103183 A EP96103183 A EP 96103183A EP 0731209 A1 EP0731209 A1 EP 0731209A1
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EP
European Patent Office
Prior art keywords
rope
fibers
strand
carbon indicator
synthetic fiber
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.)
Granted
Application number
EP96103183A
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German (de)
French (fr)
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EP0731209B1 (en
Inventor
Claudio Dipl.-Ing. De Angelis
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Inventio AG
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Inventio AG
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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
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/148—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising marks or luminous elements
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
    • D07B1/025—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/20—Organic high polymers
    • D07B2205/2046—Polyamides, e.g. nylons
    • D07B2205/205—Aramides
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3007—Carbon
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2007—Elevators

Definitions

  • the invention relates to a device for detecting the discard of synthetic ropes for lifts.
  • the number of wire breaks is defined by a certain number of wire breaks on a rope section.
  • the inspector counts the number of wire breaks accordingly. If the wire rope is ready to be discarded in good time due to the number of broken wires, a sufficient residual breaking force is usually maintained which exceeds the rope pulling force that occurs.
  • a synthetic fiber rope cannot be compared to a steel rope. Due to the type of synthetic fiber rope, the method described above for determining the maturity cannot be used to assess a possible one Wear condition of a synthetic fiber rope can be used.
  • the outer jacket of the new support element prevents the visual detection of fiber or strand breaks.
  • GB-PS 2 152 088 has disclosed a synthetic fiber rope in which one or more electrically conductive indicator fibers are inserted into the strands in order to monitor the condition of the rope.
  • the carbon indicator fibers surrounded by the synthetic fibers and the strand should have the same mechanical properties so that they fail at the same time. Tearing of the fiber can be detected by applying a voltage source to the indicator fiber. In this way, each individual strand of a synthetic fiber rope can be checked and the rope can be replaced if a certain number of torn strands is exceeded.
  • the indicator fibers are dimensioned in such a way that they tear simultaneously with the supporting strands.
  • it is difficult to obtain sufficient residual tensile strength because the break of an indicator fiber means the failure of an entire load-bearing strand and not just a single strand of a strand.
  • the time span between an apparently intact rope and a necessary replacement of the rope is very short due to this method. The progress of wear is therefore not recognizable. This facility cannot meet the safety requirements in elevator construction.
  • a reduction in the diameter of the synthetic fiber rope, or wear of the sheath is not visible even after a large number of bending changes.
  • the invention has for its object a detection maturity for a synthetic fiber rope for elevators to propose the type mentioned at the outset, which does not have the aforementioned disadvantages and by means of which the ropes can be replaced reliably in good time, but not unnecessarily early.
  • Each strand of the synthetic fiber rope preferably has more than one indicator fiber, so that a randomness in the assessment of the rope condition is excluded.
  • the carbon indicator fibers twisted or twisted with the fibers into strands can be assigned one color per layer in order to simplify connection to a voltage source.
  • Indicator fibers in at least every strand layer allow a forward-looking estimate of the time of laying down.
  • the rope is automatically checked at certain intervals. If the limit is exceeded, the elevator is automatically moved to a specific stop and switched off.
  • the rope can be equipped with a two-layer, differently colored sheath, so that the degree of wear of the rope can be checked optically in a simple manner.
  • FIG. 1 shows a schematic representation of an elevator installation.
  • a car 2 guided in an elevator shaft 1 is driven by a drive motor 3 with a traction sheave 4 via a synthetic fiber rope 5.
  • a counterweight 6 hangs as a compensating element.
  • the rope 5 is fastened to the cabin 2 and to the counterweight 6 via rope end connections 7.
  • the coefficient of friction between the rope 5 and the traction sheave 4 is dimensioned such that a further conveyance of the cabin 2 is prevented when the counterweight 6 is placed on a buffer 8.
  • the synthetic fiber rope 5 shown which is constructed in a counter-lay version, has three layers.
  • a protective sheath 12 surrounds an outermost strand layer 13. Between a middle strand layer 14 and the outermost one Strand layer 13, a friction-reducing support jacket 15 is attached. This is followed by an inner strand layer 16 and a rope core 17.
  • the strands 18 are twisted or twisted from individual aramid fibers. Each individual strand 18 is treated with an impregnating agent, for example a polyurethane solution, to protect the aramid fibers.
  • the principle of discard maturity is based on the merging of two types of fibers with different properties to form a strand 18.
  • One fiber, the aramid has a high ability to change bends and a high specific elongation.
  • the other fiber, a carbon fiber 19 has a more brittle behavior, that is to say a less good ability to change bends and a lower elongation at break than the aramid fibers.
  • these values of the carbon indicator fibers 19 can be 30% -75% of the values of aramid fibers.
  • carbon indicator fibers 19 with different elongations at break are positioned in the cable 5. Due to the type of rope, the strand length decreases towards the core 17 of the rope 5, so that the inner strands will have the least elongation during operation.
  • conductive fibers are used for the indicators 19 with elongations at break becoming less towards the cable core 17. The number of torn carbon indicator fibers 19 can be determined with the aid of a voltage source.
  • FIG. 4 shows a strand 18 of a synthetic fiber rope 5 with a carbon indicator fiber 19.
  • Both types of fibers, aramid fibers 20 and carbon fiber 19, are arranged in parallel during strand manufacture and twisted or twisted together.
  • the carbon fiber 19 can also be placed exactly in the middle of the strand 18, or extend helically on the surface line.
  • the carbon fiber 19 should be placed within the impregnating agent to provide adequate protection against Pressure and friction is given. Otherwise, a premature failure of the carbon indicator fiber 19 is to be expected and the rope 5 incorrectly appears to be ready to be discarded.
  • the carbon indicator fiber 19 is more likely to break or break than the aramid fibers 20 of a strand 18, which is characterized by exceptionally good dynamic properties, either due to excessive stretching or an excessive number of bending cycles.
  • the indicator fiber 19 is in each strand layer 13, 14, 16 or in the outermost and innermost strand layer 13, 16 placed at least in two strands 18. In a few cases, only one indicator fiber 19 in the individual strand layers 13, 14, 16 is sufficient. With 1: 1 suspended lifts, two indicator fibers 19 of a strand layer 13, 14, 16 on the counterweight 6 are always connected to one another by connecting elements 22 or connected in series. With 2: 1 suspended systems, this process can be carried out in the machine room. The indicator fibers 19 are released from the composite of the rope end led out of the rope end fastening 7 and always connected in pairs.
  • the rope ends are also led out of the rope end connection 7 and the indicator fibers 19 are released from the rope assembly.
  • the associated carbon indicator fibers 19 are selected by means of continuity measurement and connected to marked electrical lines. These lines lead to an inspection control on the cabin 2.
  • different colors are assigned to the individual strand layers 13, 14, 16. In the inspection control are all the necessary electronic components that enable a permanent inspection of the synthetic fiber rope 5.
  • Fig. 6 shows a circuit diagram of the inspection control.
  • a constant current Ik is fed into the indicator fiber 19 running to the counterweight 6 via a voltage source 25.
  • the carbon indicator fiber 19 represents a resistor R.
  • a low-pass filter TP filters the incoming pulses and feeds them to a threshold switch SW.
  • the threshold switch SW compares the measured voltages. If specific limit values are exceeded, i.e. due to the tearing indicator fibers 19, the resistance becomes so great that the permissible voltage value is exceeded. This exceeding of the limit value is stored by a non-volatile memory M.
  • This memory M can be deleted by means of a reset button T or it forwards its information to a logic L located in the cabin 2. This logic L is automatically queried by the elevator control.
  • Each pair of indicators is wired according to the above arrangement and constantly checked. The elevator control continuously checks the logic and switches the elevator off if too many fiber tears are transmitted by the logic.
  • This discard maturity detection also enables the testing of strands 18 which are arranged in the middle or innermost strand layer 14, 16 of the rope 5, without a visual assessment or an inductive test being necessary. So that the various mechanical stress states in the strand layers 13, 14, 16 in the synthetic fiber rope 5 can be taken into account, the individual layers 13, 14, 16 are assigned carbon indicator fibers 19 with corresponding elongations at break. The outermost indicator fibers 19, which in addition to the pressures have to endure the highest shear loads, can be assigned indicator fibers 19 with a somewhat higher elongation at break. In this way, an optimally controlled rope wear control can be guaranteed.
  • Fig. 7 shows a synthetic fiber rope 5 in cross section, with a multi-colored sheath.
  • the slip represents the measure of the relative movement between rope 5 and traction sheave 4. It is defined as the difference in the speeds of rope 5 and traction sheave 4 in relation to the rope speed. If a rope 5 does not have its speed when it runs onto the traction sheave 4, this is referred to as sliding slip.
  • the rope 5 always slides on the traction sheave 4 in the direction of the greater rope pulling force, regardless of the direction of rotation of the traction sheave 4.
  • the magnitude of the expansion slip increases in accordance with the driving ability of the cable sheath 12 and the groove geometry of the traction sheave 4.
  • the cable sheath 12 should have a surface corresponding to the strand structure.
  • the surface of the cable sheath 12 can be referred to as a mountain / valley structure. Due to the material combination of the synthetic fiber rope 5 and the cast / steel drive pulley 4, this is no longer subject to abrasive wear, so that in principle one can speak of a defined running surface 30. Any liquids on the traction sheave 4 can be displaced from the defined running surface due to the mountain / valley structure of the cable sheath 12. The greatest pressures which act on the sheathed strands 18 are exerted in the groove base 31 of the traction sheave 4 on the mountain areas 32 of the rope 5. As a result, the greatest signs of wear and tear will be visible there.
  • the surface wear is generated primarily by the expansion slip, but also to a certain extent by the slip slip.
  • the cable sheath 12 is extruded in an inner 33 and an outer color 34.
  • the thickness of the inner rope extrusion, ie the second color 33 measures a specific thickness which still guarantees a sufficiently large running capacity.
  • the jacket 12 protects the strands 18 and creates the necessary traction. If the inspector recognizes the extruded second color 33 of the sheath 12 during a visual inspection, he knows that the rope 5 must be replaced in the foreseeable future.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ropes Or Cables (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Types And Forms Of Lifts (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The time when a synthetic lift cable (5) has to be replaced is determined by including electrically conducting carbon indicator fibres (19) among the strands of aramid fibres which make up the layers (13,14,16) of the cable. The carbon indicator fibres (19) have a lower extensibility and a lower fatigue strength in bending than the aramid fibres (20).

Description

Die Erfindung betrifft eine Einrichtung zur Erkennung der Ablegereife bei Kunstfaserseilen für Aufzüge.The invention relates to a device for detecting the discard of synthetic ropes for lifts.

Bis heute werden im Aufzugsbau Stahlseile verwendet, welche mit den Kabinen bzw. den Lastaufnahmemitteln und Gegengewichten verbunden sind. Diese laufenden Stahlseile sind nicht dauerfest. Durch schwellende Spannungen und unterstützt durch den Verschleiss treten in den Biegezonen nach und nach Drahtbrüche auf. Das Versagen tritt durch die Kombination der verschiedenen Beanspruchungen in Aufzugsseilen, geringe Zugspannungen, aber hohe Pressungen bei hohen Spielzahlen, auf. Im Aufzugsbau spricht man von einem kontrollierbaren Seilversagen. Dies bedeutet, dass aus dem äusseren Zerstörungsgrad des Seiles die gefahrlose Restnutzungsdauer ablesbar ist. Von der Zahl der Drahtbrüche und vor allem von der Zahl der äusseren Drahtbrüche kann nur bedingt auf die verbleibende Seilbruchkraft geschlossen werden. Innere Drahtbrüche bleiben unter Umständen unbemerkt. Aufgrund dessen wird die Ablegedrahtbruchzahl durch eine bestimmte Anzahl von Drahtbrüchen auf einem Seilabschnitt definiert. Der Prüfer zählt entsprechend die Anzahl der Drahtbrüche. Wird die Ablegereife des Drahtseiles an der Drahtbruchzahl rechtzeitig erkannt, bleibt im Normalfall eine ausreichende Restbruchkraft erhalten, die die auftretende Seilzugkraft übersteigt.To this day, steel cables are used in elevator construction, which are connected to the cabins or the load handling devices and counterweights. These running steel cables are not durable. As a result of swelling tensions and supported by wear, wire breaks gradually occur in the bending zones. The failure occurs due to the combination of the various stresses in elevator ropes, low tensile stresses, but high pressures with high numbers of games. In elevator construction one speaks of a controllable rope failure. This means that the safe residual service life can be read from the external degree of destruction of the rope. From the number of wire breaks and above all from the number of outer wire breaks, the remaining rope breaking force can only be concluded to a limited extent. Internal wire breaks may go unnoticed. Because of this, the number of wire breaks is defined by a certain number of wire breaks on a rope section. The inspector counts the number of wire breaks accordingly. If the wire rope is ready to be discarded in good time due to the number of broken wires, a sufficient residual breaking force is usually maintained which exceeds the rope pulling force that occurs.

Ein Kunstfaserseil ist insofern nicht mit einem Stahlseil zu vergleichen. Aufgrund der Kunstfaserseilmachart kann das oben beschriebene Verfahren zur Bestimmung der Ablegereife nicht zur Beurteilung eines möglichen Verschleisszustandes eines Kunstfaserseiles genutzt werden. Der äussere Mantel des neuartigen Tragorganes verhindert die visuelle Erkennung von Faser- oder Litzenbrüchen.In this respect, a synthetic fiber rope cannot be compared to a steel rope. Due to the type of synthetic fiber rope, the method described above for determining the maturity cannot be used to assess a possible one Wear condition of a synthetic fiber rope can be used. The outer jacket of the new support element prevents the visual detection of fiber or strand breaks.

Mit der GB-PS 2 152 088 ist ein Kunstfaserseil bekanntgeworden, bei dem eine oder mehrere elektrisch leitende Indikatorfasern in die Litzen eingelegt werden, um den Seilzustand zu überwachen. Die von den Kunstfasern umgebenen Kohle-Indikatorfasern und die Litze sollen die gleichen mechanischen Eigenschaften haben, so dass sie gleichzeitig versagen. Durch Anlegen einer Spannungsquelle an der Indikatorfaser kann ein Reissen der Faser detektiert werden. Auf diese Weise kann jede einzelne Litze eines Kunstfaserseil überprüft und bei Überschreiten einer gewissen Anzahl gerissener Litzen das Seil ausgewechselt werden.GB-PS 2 152 088 has disclosed a synthetic fiber rope in which one or more electrically conductive indicator fibers are inserted into the strands in order to monitor the condition of the rope. The carbon indicator fibers surrounded by the synthetic fibers and the strand should have the same mechanical properties so that they fail at the same time. Tearing of the fiber can be detected by applying a voltage source to the indicator fiber. In this way, each individual strand of a synthetic fiber rope can be checked and the rope can be replaced if a certain number of torn strands is exceeded.

Bei der vorstehend beschriebenen Erfindung werden die Indikatorfasern so dimensioniert, dass sie gleichzeitig mit den tragenden Litzen reissen. Im Extremfall ist somit eine ausreichende Restbruchkraft schwierig zu erhalten, da der Riss einer Indikatorfaser das Versagen einer gesamten tragenden Litze bedeutet und nicht nur einer einzelnen Faser einer Litze. Die Zeitspanne zwischen einem scheinbar intakten Seil und einer notwendigen Auswechslung des Seils ist aufgrund dieser Methode sehr klein. Der Verschleissfortschritt ist somit nicht erkennbar. Diese Einrichtung kann den Sicherheitsanforderungen im Aufzugsbau nicht genügen. Desweitern ist eine Durchmesserreduzierung des Kunstfaserseils, bzw. eine Abnutzung des Mantels, auch nach einer grossen Anzahl Biegewechsel optisch nicht zu erkennen.In the invention described above, the indicator fibers are dimensioned in such a way that they tear simultaneously with the supporting strands. In extreme cases, it is difficult to obtain sufficient residual tensile strength because the break of an indicator fiber means the failure of an entire load-bearing strand and not just a single strand of a strand. The time span between an apparently intact rope and a necessary replacement of the rope is very short due to this method. The progress of wear is therefore not recognizable. This facility cannot meet the safety requirements in elevator construction. Furthermore, a reduction in the diameter of the synthetic fiber rope, or wear of the sheath, is not visible even after a large number of bending changes.

Der Erfindung liegt die Aufgabe zugrunde, eine Ablegereifeerkennung für ein Kunstfaserseil für Aufzüge der eingangs genannten Art vorzuschlagen, welche die vorgenannten Nachteile nicht aufweist und mittels welcher eine Auswechslung der Seile zuverlässig rechtzeitig, jedoch nicht unnötig vorzeitig erfolgen kann.The invention has for its object a detection maturity for a synthetic fiber rope for elevators to propose the type mentioned at the outset, which does not have the aforementioned disadvantages and by means of which the ropes can be replaced reliably in good time, but not unnecessarily early.

Diese Aufgabe wird durch die im Patentanspruch 1 gekennzeichnete Erfindung gelöst.This object is achieved by the invention characterized in claim 1.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass durch unterschiedliche Eigenschaften der leitenden Indikatorfasern und der tragenden Fasern eine genaue Beurteilung der Restbruchkraft des Kunstfaserseils möglich ist.The advantages achieved by the invention are essentially to be seen in the fact that different properties of the conductive indicator fibers and the supporting fibers enable an accurate assessment of the residual breaking strength of the synthetic fiber rope.

Durch die in den Unteransprüchen aufgeführten Massnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Ablegereifeerkennung für Kunstfaserseile möglich. Jede Litzenlage des Kunstfaserseils besitzt vorzugsweise mehr als eine Indikatorfaser, damit eine Zufälligkeit in der Beurteilung des Seilzustandes ausgeschlossen ist. Den mit den Fasern zu Litzen verdrehten bzw. verzwirnten Kohle-Indikatorfasern kann pro Lage je eine Farbe zugeteilt werden um ein Anschliessen an eine Spannungsquelle zu vereinfachen. Indikatorfasern in mindestens jeder Litzenlage ermöglichen eine vorausschauende Abschätzung des Ablegezeitpunktes. Mittels einer mit den Indikatorfasern in Verbindung stehenden Inspektionssteuerung findet in bestimmten Intervallen eine selbsttätige Überprüfung des Seiles statt. Bei einer Grenzwertüberschreitung wird der Aufzug automatisch zu einer bestimmten Haltestelle gefahren und abgeschaltet. Zudem kann das Seil mit einem zweischichtigen, verschiedenfarbigen Mantel ausgestattet werden, so dass der Verschleissgrad des Seiles auf einfache Art und Weise optisch überprüft werden kann.The measures listed in the subclaims enable advantageous further developments and improvements of the discard maturity detection for synthetic fiber ropes specified in claim 1. Each strand of the synthetic fiber rope preferably has more than one indicator fiber, so that a randomness in the assessment of the rope condition is excluded. The carbon indicator fibers twisted or twisted with the fibers into strands can be assigned one color per layer in order to simplify connection to a voltage source. Indicator fibers in at least every strand layer allow a forward-looking estimate of the time of laying down. By means of an inspection control connected to the indicator fibers, the rope is automatically checked at certain intervals. If the limit is exceeded, the elevator is automatically moved to a specific stop and switched off. In addition, the rope can be equipped with a two-layer, differently colored sheath, so that the degree of wear of the rope can be checked optically in a simple manner.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt und im folgenden näher erläutert. Es zeigen:

Fig.1
eine schematische Darstellung einer Aufzugsanlage,
Fig.2, 3
ein Kunstfaserseil mit Indikatorfasern,
Fig.4
eine Litze eines Kunstfaserseils mit einer Kohle-Indikatorfaser,
Fig.5
eine Kontaktierung von Indikatorfasern an einem Seilende,
Fig.6
ein Schaltschema der Inspektionssteuerung, und
Fig.7
ein Kunstfaserseil im Querschnitt mit mehrfarbigem Mantel.
In the drawing, an embodiment of the invention is shown and explained in more detail below. Show it:
Fig. 1
1 shows a schematic representation of an elevator installation,
Fig. 2, 3
a synthetic fiber rope with indicator fibers,
Fig. 4
a strand of a synthetic fiber rope with a carbon indicator fiber,
Fig. 5
contacting of indicator fibers at one end of the rope,
Fig. 6
a circuit diagram of the inspection control, and
Fig. 7
a cross section of a synthetic fiber rope with a multicolored sheath.

Fig.1 zeigt eine schematische Darstellung einer Aufzugsanlage. Eine in einem Aufzugsschacht 1 geführte Kabine 2 wird von einem Antriebsmotor 3 mit einer Treibscheibe 4 über ein Kunstfaserseil 5 angetrieben. Am anderen Ende des Seiles 5 hängt ein Gegengewicht 6 als Ausgleichsorgan. Die Befestigung des Seils 5 an der Kabine 2 und am Gegengewicht 6 erfolgt über Seilendverbindungen 7. Der Reibwert zwischen dem Seil 5 und der Treibscheibe 4 wird so dimensioniert, dass bei auf einem Puffer 8 aufgesetztem Gegengewicht 6 eine weitere Förderung der Kabine 2 verhindert wird.1 shows a schematic representation of an elevator installation. A car 2 guided in an elevator shaft 1 is driven by a drive motor 3 with a traction sheave 4 via a synthetic fiber rope 5. At the other end of the rope 5, a counterweight 6 hangs as a compensating element. The rope 5 is fastened to the cabin 2 and to the counterweight 6 via rope end connections 7. The coefficient of friction between the rope 5 and the traction sheave 4 is dimensioned such that a further conveyance of the cabin 2 is prevented when the counterweight 6 is placed on a buffer 8.

Fig.2 und Fig.3 zeigen ein Kunstfaserseil 5 mit Indikatorfasern. Das gezeigte, in Gegenschlagausführung aufgebaute Kunstfaserseil 5 ist dreilagig. Ein Schutzmantel 12 umgibt eine äusserste Litzenlage 13. Zwischen einer mittleren Litzenlage 14 und der äussersten Litzenlage 13 wird ein reibungsmindernder Stützmantel 15 angebracht. Dann folgen eine innere Litzenlage 16 und eine Seilseele 17. Die Litzen 18 werden aus einzelnen Aramidfasern verdreht bzw. verzwirnt. Jede einzelne Litze 18 wird zum Schutz der Aramidfasern mit einem Imprägniermittel, z.B. Polyurethanlösung, behandelt. Das Prinzip der Ablegereifeerkennung basiert auf der Zusammenführung zweier Fasertypen mit verschiedenen Eigenschaften zu einer Litze 18. Die eine Faser, das Aramid, besitzt eine hohe Biegewechselfähigkeit und eine hohe spezifische Dehnung. Die andere Faser, eine Kohlefaser 19, hat ein spröderes Verhalten, also eine weniger gute Biegewechselfähigkeit und eine niedrigere Bruchdehnung als die Aramidfasern. Diese Werte der Kohle-Indikatorfasern 19 können je nach Anwendung bei 30% - 75% der Werte von Aramidfasern liegen. Entsprechend der im Seil 5 auftretenden verschiedenen Seilzugspannungen werden Kohle-Indikatorfasern 19 mit verschiedenen Bruchdehnungen im Seil 5 positioniert. Aufgrund der Seilmachart nimmt die Litzenlänge zur Seele 17 des Seiles 5 hin ab, so dass im laufenden Betrieb die inneren Litzen die geringste Dehnung aufweisen werden. Der Dehnung entsprechend werden für die Indikatoren 19 leitfähige Fasern mit zur Seilseele 17 hin geringer werdenden Bruchdehnungen verwendet. Mit Hilfe einer Spannungsquelle kann die Anzahl der gerissenen Kohle-Indikatorfasern 19 bestimmt werden.2 and 3 show a synthetic fiber rope 5 with indicator fibers. The synthetic fiber rope 5 shown, which is constructed in a counter-lay version, has three layers. A protective sheath 12 surrounds an outermost strand layer 13. Between a middle strand layer 14 and the outermost one Strand layer 13, a friction-reducing support jacket 15 is attached. This is followed by an inner strand layer 16 and a rope core 17. The strands 18 are twisted or twisted from individual aramid fibers. Each individual strand 18 is treated with an impregnating agent, for example a polyurethane solution, to protect the aramid fibers. The principle of discard maturity is based on the merging of two types of fibers with different properties to form a strand 18. One fiber, the aramid, has a high ability to change bends and a high specific elongation. The other fiber, a carbon fiber 19, has a more brittle behavior, that is to say a less good ability to change bends and a lower elongation at break than the aramid fibers. Depending on the application, these values of the carbon indicator fibers 19 can be 30% -75% of the values of aramid fibers. In accordance with the various cable tension tensions occurring in the cable 5, carbon indicator fibers 19 with different elongations at break are positioned in the cable 5. Due to the type of rope, the strand length decreases towards the core 17 of the rope 5, so that the inner strands will have the least elongation during operation. Corresponding to the elongation, conductive fibers are used for the indicators 19 with elongations at break becoming less towards the cable core 17. The number of torn carbon indicator fibers 19 can be determined with the aid of a voltage source.

Fig.4 zeigt eine Litze 18 eines Kunstfaserseils 5 mit einer Kohle-Indikatorfaser 19. Beide Fasertypen, Aramidfasern 20 und die Kohlefaser 19, werden bei der Litzenherstellung parallel angeordnet und miteinander verdreht bzw. verzwirnt. Dabei kann die Kohlefaser 19 auch genau mittig in der Litze 18 plaziert werden, oder auf der Mantellinie wendelförmig verlaufen. Die Kohlefaser 19 sollte innerhalb des Imprägniermittels angeordnet werden, damit ein ausreichender Schutz gegen Pressung und Reibung gegeben ist. Ansonsten ist ein vorzeitiges Versagen der Kohle-Indikatorfaser 19 zu erwarten und das Seil 5 erscheint fälschlicherweise ablegereif. Im laufenden Betrieb wird in jedem Falle die Kohle-Indikatorfaser 19 entweder aufgrund zu grosser Dehnungen oder einer zu grossen Anzahl von Biegewechseln eher reissen oder brechen als die Aramidfasern 20 einer Litze 18, welche sich durch aussergewöhnlich gute dynamische Eigenschaften auszeichnet.4 shows a strand 18 of a synthetic fiber rope 5 with a carbon indicator fiber 19. Both types of fibers, aramid fibers 20 and carbon fiber 19, are arranged in parallel during strand manufacture and twisted or twisted together. The carbon fiber 19 can also be placed exactly in the middle of the strand 18, or extend helically on the surface line. The carbon fiber 19 should be placed within the impregnating agent to provide adequate protection against Pressure and friction is given. Otherwise, a premature failure of the carbon indicator fiber 19 is to be expected and the rope 5 incorrectly appears to be ready to be discarded. In any case, during operation, the carbon indicator fiber 19 is more likely to break or break than the aramid fibers 20 of a strand 18, which is characterized by exceptionally good dynamic properties, either due to excessive stretching or an excessive number of bending cycles.

Fig.5 zeigt eine Kontaktierung der Kohle-Indikatorfasern 19 an einem Ende eines Seiles 5. Ausschlaggebend für diese Ablegereifeerkennung ist die gute elektrische Leitfähigkeit der Kohle-Indikatorfasern 19. Die Indikatorfaser 19 wird in jeder Litzenlage 13, 14, 16 oder in der äussersten und innersten Litzenlage 13, 16 mindestens in zwei Litzen 18 plaziert. In wenigen Fällen reicht auch nur eine Indikatorfaser 19 in den einzelnen Litzenlagen 13, 14, 16 aus. Bei 1:1 gehängten Aufzügen werden immer zwei Indikatorfasern 19 einer Litzenlage 13, 14, 16 auf dem Gegengewicht 6 durch Verbindungselemente 22 miteinander verbunden bzw. in Reihe geschaltet. Bei 2:1 gehängten Anlagen kann dieser Vorgang im Maschinenraum durchgeführt werden. Die Indikatorfasern 19 werden aus dem Verbund des aus der Seilendbefestigung 7 geführten Seilendes herausgelöst und immer paarweise miteinander verbunden. Auf der Kabine 2 werden die Seilenden ebenfalls aus der Seilendverbindung 7 herausgeführt und die Indikatorfasern 19 aus dem Seilverbund gelöst. Dort werden die zusammengehörigen Kohle-Indikatorfasern 19 mittels Durchgangsmessung herausgesucht und mit gekennzeichneten elektrischen Leitungen verbunden. Diese Leitungen führen auf der Kabine 2 in eine Inspektionssteuerung. Um den Anschluss an die Inspektionssteuerung zu vereinfachen, werden den einzelnen Litzenlagen 13, 14, 16 verschiedene Farben zugeordnet. In der Inspektionssteuerung befinden sich alle notwendigen elektronischen Bauteile, die eine ständige Prüfung des Kunstfaserseiles 5 ermöglichen.5 shows a contacting of the carbon indicator fibers 19 at one end of a rope 5. Decisive for this discard maturity detection is the good electrical conductivity of the carbon indicator fibers 19. The indicator fiber 19 is in each strand layer 13, 14, 16 or in the outermost and innermost strand layer 13, 16 placed at least in two strands 18. In a few cases, only one indicator fiber 19 in the individual strand layers 13, 14, 16 is sufficient. With 1: 1 suspended lifts, two indicator fibers 19 of a strand layer 13, 14, 16 on the counterweight 6 are always connected to one another by connecting elements 22 or connected in series. With 2: 1 suspended systems, this process can be carried out in the machine room. The indicator fibers 19 are released from the composite of the rope end led out of the rope end fastening 7 and always connected in pairs. In the cabin 2, the rope ends are also led out of the rope end connection 7 and the indicator fibers 19 are released from the rope assembly. There, the associated carbon indicator fibers 19 are selected by means of continuity measurement and connected to marked electrical lines. These lines lead to an inspection control on the cabin 2. In order to simplify the connection to the inspection control, different colors are assigned to the individual strand layers 13, 14, 16. In the inspection control are all the necessary electronic components that enable a permanent inspection of the synthetic fiber rope 5.

Fig.6 zeigt ein Schaltschema der Inspektionssteuerung. Über eine Spannungsquelle 25 wird ein konstanter Strom Ik in die zum Gegengewicht 6 laufende Indikatorfaser 19 eingespeist. Die Kohle-Indikatorfaser 19 stellt einen Widerstand R dar. Ein Tiefpassfilter TP filtert die ankommenden Impulse und führt diese einem Schwellwertschalter SW zu. Der Schwellwertschalter SW vergleicht die gemessenen Spannungen. Bei Überschreitung spezifischer Grenzwerte, d.h. aufgrund der reissenden Indikatorfasern 19 wird der Widerstand so gross, dass der zulässige Spannungswert überschritten wird. Diese Überschreitung des Grenzwertes wird von einem nicht flüchtigen Speicher M gespeichert. Dieser Speicher M kann mittels einer Reset-Taste T gelöscht werden oder er gibt seine Informationen an eine auf der Kabine 2 befindliche Logik L weiter. Diese Logik L wird von der Aufzugssteuerung selbsttätig abgefragt. Jede Indikatorpaarung wird entsprechend der obengenannten Anordnung verkabelt und ständig überprüft. Die Aufzugssteuerung überprüft dauernd die Logik und schaltet den Aufzug ab, wenn zu viele Faserrisse von der Logik übermittelt werden.Fig. 6 shows a circuit diagram of the inspection control. A constant current Ik is fed into the indicator fiber 19 running to the counterweight 6 via a voltage source 25. The carbon indicator fiber 19 represents a resistor R. A low-pass filter TP filters the incoming pulses and feeds them to a threshold switch SW. The threshold switch SW compares the measured voltages. If specific limit values are exceeded, i.e. due to the tearing indicator fibers 19, the resistance becomes so great that the permissible voltage value is exceeded. This exceeding of the limit value is stored by a non-volatile memory M. This memory M can be deleted by means of a reset button T or it forwards its information to a logic L located in the cabin 2. This logic L is automatically queried by the elevator control. Each pair of indicators is wired according to the above arrangement and constantly checked. The elevator control continuously checks the logic and switches the elevator off if too many fiber tears are transmitted by the logic.

Damit eine bestimmte Resttragfähigkeit des Seiles 5 gewährleistet werden kann, darf nur ein bestimmter Prozentsatz der Indikatorfasern 19 versagen. Dieser Wert kann, in Abhängigkeit der Dimensionierung der Kohle-Indikatorfasern 19, zwischen 20% und 80% liegen, bezogen auf alle Kohle-Indikatorfasern 19. Dann wird der Aufzug selbsttätig in einen vorbestimmten Halt gefahren und ausgeschaltet. Störungsmeldungen können über ein Display weitergegeben und angezeigt werden. Der Verschleisszustand kann über ein Modem von jedem beliebigen Ort aus abgefragt werden.So that a certain residual load-bearing capacity of the rope 5 can be guaranteed, only a certain percentage of the indicator fibers 19 may fail. Depending on the dimensioning of the carbon indicator fibers 19, this value can be between 20% and 80%, based on all the carbon indicator fibers 19. The elevator is then automatically moved to a predetermined stop and switched off. Fault messages can be passed on and displayed on a display. The state of wear can be queried from any location using a modem.

Diese Ablegereifeerkennung ermöglicht auch die Prüfung von Litzen 18, die in der mittleren oder innersten Litzenlage 14, 16 des Seiles 5 angeordnet sind, ohne das eine visuelle Beurteilung oder eine induktive Prüfung notwendig wäre. Damit den verschiedenen mechanischen Spannungszuständen in den Litzenlagen 13, 14, 16 im Kunstfaserseil 5 Rechnung getragen werden kann, werden den einzelnen Lagen 13, 14, 16 Kohle-Indikatorfasern 19 mit entsprechenden Bruchdehnungen zugeordnet. Den äussersten Indikatorfasern 19, die neben den Pressungen die höchsten Schubbelastungen ertragen müssen, können Indikatorfasern 19 mit einer etwas höheren Bruchdehnung zugeordnet werden. Auf diesem Weg kann eine optimal gesteuerte Seilverschleisskontrolle gewährleistet werden.This discard maturity detection also enables the testing of strands 18 which are arranged in the middle or innermost strand layer 14, 16 of the rope 5, without a visual assessment or an inductive test being necessary. So that the various mechanical stress states in the strand layers 13, 14, 16 in the synthetic fiber rope 5 can be taken into account, the individual layers 13, 14, 16 are assigned carbon indicator fibers 19 with corresponding elongations at break. The outermost indicator fibers 19, which in addition to the pressures have to endure the highest shear loads, can be assigned indicator fibers 19 with a somewhat higher elongation at break. In this way, an optimally controlled rope wear control can be guaranteed.

Fig.7 zeigt ein Kunstfaserseil 5 im Querschnitt, mit mehrfarbigem Mantel. Für die visuelle Beurteilung eines Kunstfaserseils 5 auf einen möglichen ablegereifen Verschleisszustand wird die vorhandene Seilmanteloberfläche überprüft. Dafür muss gewährleistet werden können, dass ein Abrieb des Seilmantels 12 an der Oberfläche erfolgt. Dieser Abrieb wird über den im laufenden Betrieb auftretenden Schlupf erzeugt. Der Schlupf stellt das Mass für die Relativbewegung zwischen Seil 5 und Treibscheibe 4 dar. Er ist definiert als die Differenz der Geschwindigkeiten von Seil 5 und Treibscheibe 4 bezogen auf die Seilgeschwindigkeit. Hat ein Seil 5 beim Auflaufen auf die Treibscheibe 4 nicht deren Geschwindigkeit, spricht man von Gleitschlupf. Wenn beim Lauf über die Treibscheibe 4 die an beiden Seiten hängenden Gewichte unterschiedliche Seilzugkräfte verursachen, wird in jedem Fall Dehnschlupf auftreten, auch wenn die Treibfähigkeit überaus gross wäre. Das Seil 5 hat bei unterschiedlichen Seilzugkräften vor und hinter der Treibscheibe 4 verschiedene Spannungen. Dadurch werden verschiedene Dehnungen vor und hinter der Treibscheibe 4 erzeugt. Beim Lauf über die Treibscheibe 4 stellt sich der neue Dehnungszustand durch Rutschen des Seiles 5 ein. Bei kleinem Seilkraftverhältnis tritt die daraus resultierende Rutschbewegung im Bereich des Ablaufpunktes auf, bei voll ausgeschöpfter Treibfähigkeit tritt dagegen ein Rutschen über den gesamten Umschlingungsbogen auf.Fig. 7 shows a synthetic fiber rope 5 in cross section, with a multi-colored sheath. For the visual assessment of a synthetic fiber rope 5 for a possible wear-ready state, the existing surface of the rope sheath is checked. For this, it must be possible to ensure that the cable sheath 12 is abraded on the surface. This abrasion is generated by the slip occurring during operation. The slip represents the measure of the relative movement between rope 5 and traction sheave 4. It is defined as the difference in the speeds of rope 5 and traction sheave 4 in relation to the rope speed. If a rope 5 does not have its speed when it runs onto the traction sheave 4, this is referred to as sliding slip. If the weights hanging on both sides cause different cable tensile forces when running over the traction sheave 4, expansion slippage will occur in any case, even if the driving ability would be extremely high. The rope 5 has 4 different tensions in front of and behind the traction sheave with different rope tensile forces. This will cause different strains in front of and behind the Traction sheave 4 generated. When running over the traction sheave 4, the new state of stretching occurs due to the rope 5 sliding. If the rope force ratio is low, the resulting sliding movement occurs in the area of the point of unwinding, but when the driving capacity is fully exhausted, sliding occurs over the entire loop.

Das Seil 5 gleitet immer auf der Treibscheibe 4 in Richtung der grösseren Seilzugkraft, unabhängig von der Drehrichtung der Treibscheibe 4. Die Grössenordnung des Dehnschlupfes wächst entsprechend der Treibfähigkeit des Seilmantels 12 und der Rillengeometrie der Treibscheibe 4.The rope 5 always slides on the traction sheave 4 in the direction of the greater rope pulling force, regardless of the direction of rotation of the traction sheave 4. The magnitude of the expansion slip increases in accordance with the driving ability of the cable sheath 12 and the groove geometry of the traction sheave 4.

Der Seilmantel 12 soll eine der Litzenstruktur entsprechende Oberfläche erhalten. Die Oberfläche des Seilmantels 12 kann als Berg-/Talstruktur bezeichnet werden. Aufgrund der Materialkombination des Kunstfaserseils 5 und der Guss-/Stahltreibscheibe 4 unterliegt diese keinem abrasiven Verschleiss mehr, so dass im Prinzip von einer definierten Lauffläche 30 gesprochen werden kann. Allfällige Flüssigkeiten auf der Treibscheibe 4 können aufgrund der Berg-/Talstruktur des Seilmantels 12 von der definierten Lauffläche verdrängt werden. Die grössten Pressungen, die auf die ummantelten Litzen 18 wirken, werden im Rillengrund 31 der Treibscheibe 4 auf die Bergbereiche 32 des Seiles 5 ausgeübt. Folglich werden dort die grössten Verschleisserscheinungen zu erkennen sein. Vor allem durch den Dehnschlupf, aber auch in einem gewissem Masse durch den Gleitschlupf, wird der Oberflächenverschleiss erzeugt. Aus Erfahrungen mit den Stahlseilen werden die grössten Veränderungen auf den Beschleunigungsstrecken zu verzeichnen sein. Damit der Betrag des Abriebes festgestellt, d.h. dem Prüfer ein Mittel zur visuellen Kontrolle zur Verfügung gestellt werden kann, ob bis zur nächsten Prüfung genügend Manteldicke vorhanden ist, wird der Seilmantel 12 in einer inneren 33 und einer äusseren Farbe 34 extrudiert. Die Dicke der seilinneren Extrusion, d.h. die zweite Farbe 33 misst eine spezifische Stärke, die noch ein genügend grosses Laufvermögen garantiert. Der Mantel 12 schützt die Litzen 18 und erzeugt die notwendige Traktionsfähigkeit. Erkennt der Prüfer bei einer visuellen Kontrolle die einextrudierte zweite Farbe 33 des Mantels 12, so weiss er, dass das Seil 5 in absehbarer Zeit ersetzt werden muss.The cable sheath 12 should have a surface corresponding to the strand structure. The surface of the cable sheath 12 can be referred to as a mountain / valley structure. Due to the material combination of the synthetic fiber rope 5 and the cast / steel drive pulley 4, this is no longer subject to abrasive wear, so that in principle one can speak of a defined running surface 30. Any liquids on the traction sheave 4 can be displaced from the defined running surface due to the mountain / valley structure of the cable sheath 12. The greatest pressures which act on the sheathed strands 18 are exerted in the groove base 31 of the traction sheave 4 on the mountain areas 32 of the rope 5. As a result, the greatest signs of wear and tear will be visible there. The surface wear is generated primarily by the expansion slip, but also to a certain extent by the slip slip. Experience with the steel ropes will show the greatest changes on the acceleration routes. So that the amount of abrasion can be determined, ie a means of visual control can be made available to the tester, whether up to next test there is sufficient sheath thickness, the cable sheath 12 is extruded in an inner 33 and an outer color 34. The thickness of the inner rope extrusion, ie the second color 33, measures a specific thickness which still guarantees a sufficiently large running capacity. The jacket 12 protects the strands 18 and creates the necessary traction. If the inspector recognizes the extruded second color 33 of the sheath 12 during a visual inspection, he knows that the rope 5 must be replaced in the foreseeable future.

Zur optimalen Beurteilung des Seilzustandes eines Kunstfaserseiles sollte eine Kombination der beiden Prüfverfahren, die Selbstkontrolle mittels Indikatorfasern 19 und die visuelle Mantelkontrolle mit einem zweifarbigen Mantel, angewendet werden.For an optimal assessment of the condition of the rope of a synthetic fiber rope, a combination of the two test methods, the self-control by means of indicator fibers 19 and the visual sheath control with a two-colored sheath, should be used.

Claims (10)

Einrichtung zur Erkennung der Ablegereife von Kunstfaserseilen (5) für Aufzüge, wobei das Kunstfaserseil (5) aus mehreren Litzenlagen (13, 14, 16) aufgebaut ist und dessen Litzen (18) aus Aramidfasern (20) und elektrisch leitenden Kohle-Indikatorfasern (19) bestehen,
dadurch gekennzeichnet,
dass die Kohle-Indikatorfasern (19) für eine geringere spezifische Dehnung und eine niedrigere Biegewechselfähigkeit als die Aramidfasern (20) dimensioniert sind.Device for detecting the maturity of synthetic fiber ropes (5) for lifts, the synthetic fiber rope (5) being constructed from a plurality of strand layers (13, 14, 16) and the strands (18) made of aramid fibers (20) and electrically conductive carbon indicator fibers (19 ) consist,
characterized,
that the carbon indicator fibers (19) are dimensioned for a lower specific elongation and a lower bending ability than the aramid fibers (20). Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
dass die Bruchdehnungen der Kohle-Indikatorfasern (19) zur Seilseele (17) hin geringer werden.Device according to claim 1,
characterized,
that the elongations at break of the carbon indicator fibers (19) towards the cable core (17) decrease. Einrichtung nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet,
dass jede Litzenlage (13, 14, 16) mindestens eine Kohle-Indikatorfaser (19) aufweist.Device according to one of claims 1 or 2,
characterized,
that each strand layer (13, 14, 16) has at least one carbon indicator fiber (19). Einrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass die Kohle-Indikatorfasern (19) mit den Aramidfasern (20) aus einer parallelen Anordnung miteinander verdreht oder verzwirnt werden.Device according to one of claims 1 to 3,
characterized,
that the carbon indicator fibers (19) are twisted or twisted with the aramid fibers (20) from a parallel arrangement. Einrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass die Kohle-Indikatorfasern (19) mittig in den Litzen (20) verlaufen.Device according to one of claims 1 to 4,
characterized,
that the carbon indicator fibers (19) run centrally in the strands (20). Einrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
dass die Kohle-Indikatorfasern (19) wendelartig auf der Oberfläche einer Litze (20) verlaufen.Device according to one of claims 1 to 4,
characterized,
that the carbon indicator fibers (19) run helically on the surface of a strand (20). Einrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
dass die Aufzugssteuerung ständig und selbsttätig den Zustand des Seiles (5) bzw. der Litzen (18) von einer Logik (L) abfragt.Device according to one of claims 1 to 6,
characterized,
that the elevator control continuously and automatically queries the state of the rope (5) or the strands (18) by a logic (L). Einrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
dass den einzelnen Litzenlagen (13, 14, 16) verschiedene Farben zugeordnet werden.Device according to one of claims 1 to 7,
characterized,
that the individual strand layers (13, 14, 16) are assigned different colors. Einrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
dass der Schutzmantel (12) des Kunstfaserseiles (5) eine innere Mantelfarbe (33) und eine äussere Mantelfarbe (34) aufweist.Device according to one of claims 1 to 8,
characterized,
that the protective sheath (12) of the synthetic fiber rope (5) has an inner sheath color (33) and an outer sheath color (34). Einrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
dass die Dicke des Mantels (12) im Bereich der inneren Mantelfarbe (33) ein genügend grosses Laufvermögen garantiert.Device according to one of claims 1 to 9,
characterized,
that the thickness of the jacket (12) in the area of the inner jacket color (33) guarantees a sufficiently large running capacity.
EP96103183A 1995-03-06 1996-03-01 Device for detecting the end of service life for synthetic fibre ropes Expired - Lifetime EP0731209B1 (en)

Applications Claiming Priority (3)

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CH63095 1995-03-06
CH63095 1995-03-06

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US11162214B2 (en) 2017-01-27 2021-11-02 Fatzer Ag Drahtseilfabrik Longitudinal element, in particular for a traction or suspension means
EP3392404A1 (en) 2017-04-20 2018-10-24 Teufelberger Fiber Rope GmbH High strength fibre cable for hoisting equipment such as cranes
US10808355B2 (en) 2017-04-20 2020-10-20 Teufelberger Fiber Rope Gmbh High-strength fibre rope for hoisting equipment such as cranes
CN107815905B (en) * 2017-12-03 2019-09-06 桐乡市易知简能信息技术有限公司 A kind of rope indicating pulling force
CN107815905A (en) * 2017-12-03 2018-03-20 桐乡市易知简能信息技术有限公司 A kind of rope that may indicate that pulling force

Also Published As

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CN1048777C (en) 2000-01-26
CA2169431A1 (en) 1996-09-07
ES2136335T3 (en) 1999-11-16
AU4584896A (en) 1996-09-19
CA2169431C (en) 2005-07-12
HU218451B (en) 2000-08-28
AU700649B2 (en) 1999-01-14
EP0731209B1 (en) 1999-07-07
KR960034054A (en) 1996-10-22
US5834942A (en) 1998-11-10
RU2148117C1 (en) 2000-04-27
TR199600183A2 (en) 1996-10-21
BR9600892A (en) 1997-12-30
CZ64996A3 (en) 1996-09-11
HU9600548D0 (en) 1996-05-28
JP3824698B2 (en) 2006-09-20
HUP9600548A2 (en) 1997-05-28
DK0731209T3 (en) 2000-01-17
CN1134484A (en) 1996-10-30
DE59602355D1 (en) 1999-08-12
AR001155A1 (en) 1997-09-24
NO960880L (en) 1996-09-09
JPH08261972A (en) 1996-10-11
PL181290B1 (en) 2001-07-31
NO960880D0 (en) 1996-03-05
CZ288156B6 (en) 2001-05-16
ATE181977T1 (en) 1999-07-15
HK1011391A1 (en) 1999-07-09
HUP9600548A3 (en) 1999-11-29
NZ286035A (en) 1997-06-24
PL313088A1 (en) 1996-09-16
KR100434776B1 (en) 2004-09-20
ZA961733B (en) 1996-09-10
NO305133B1 (en) 1999-04-06

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