Synthetic fiber rope for supporting an elevator car
First Claim
1. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having a plurality of strands that are arranged in at least one strand layer, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
- at least one of the strands in the at least one strand layer being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn;
at least another strand of the plurality of strands not including either of an indicator fiber or an indicator yarn, wherein said indicator strand is inferior to said another strand in relation to applied stress for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installationwherein the synthetic fibers forming said indicator strand have a reverse bending capacity inferior to a reverse bending capacity of the synthetic fibers forming said another strand.
1 Assignment
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Accused Products
Abstract
A synthetic fiber rope can be used to the limit of failure by setting a sensitivity of detection of the state of wear of the rope. Strands of the rope have indicator fibers or indicator yarn that have a high probability of losing electrical conductivity and thereby indicate a worn cable. The indicator yarn consists of indicator fibers and of synthetic fibers, the indicator yarn fibers being inferior in relation to stress than the synthetic fibers of the strands.
27 Citations
17 Claims
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1. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having a plurality of strands that are arranged in at least one strand layer, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
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at least one of the strands in the at least one strand layer being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn; at least another strand of the plurality of strands not including either of an indicator fiber or an indicator yarn, wherein said indicator strand is inferior to said another strand in relation to applied stress for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installation wherein the synthetic fibers forming said indicator strand have a reverse bending capacity inferior to a reverse bending capacity of the synthetic fibers forming said another strand. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having strands, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
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a core strand; at least one inner strand layer formed of a plurality of first strands surrounding said core strand and including at least one of said first strands being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn; an outer strand layer formed of a plurality of second strands surrounding said inner strand layer wherein said indicator strand is inferior in relation to applied stress for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installation to ones of said first and second strands not including either of said at least one indicator fiber or said at least one indicator yarn wherein the synthetic fibers forming said indicator strand have a reverse bending capacity inferior to a reverse bending capacity of the synthetic fibers forming said another strand. - View Dependent Claims (13)
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14. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having strands, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
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a core strand; at least one inner strand layer formed of a plurality of first strands surrounding said core strand and including at least one of said first strands being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn; an outer strand layer formed of a plurality of second strands surrounding said at least one inner strand layer wherein said first and second strands are each surrounded by a matrix material and said matrix material surrounding said indicator strand has a lower resistance to abrasion than said matrix material surrounding other ones of said first and second strands not including either of said at least indicator fiber or said at least one indicator yarn for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installation; and wherein the synthetic fibers forming said indicator strand have a reverse bending capacity inferior to a reverse bending capacity of the synthetic fibers forming said another strand.
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15. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having a plurality of strands that are arranged in at least one strand layer, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
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at least one of the strands in the at least one strand layer being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn; at least another strand of the plurality of strands not including either of an indicator fiber or an indicator yarn, wherein said indicator strand is inferior to said another strand in relation to applied stress for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installation; and wherein said indicator strand includes said at least one indicator yarn and not said at least one indicator fiber, and wherein a modulus of elasticity of the synthetic fibers of said indicator yarn is higher than a modulus of elasticity of the synthetic fibers of said another strand.
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16. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having strands, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
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a core strand; at least one inner strand layer formed of a plurality of first strands surrounding said core strand and including at least one of said first strands being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn; an outer strand layer formed of a plurality of second strands surrounding said inner strand layer wherein said indicator strand is inferior in relation to applied stress for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installation to ones of said first and second strands not including either of said at least one indicator fiber or said at least one indicator yarn; and wherein said indicator strand includes said at least one indicator yarn and not said at least one indicator fiber, and wherein a modulus of elasticity of the synthetic fibers of said indicator yarn is higher than a modulus of elasticity of the synthetic fibers of said another strand.
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17. A synthetic fiber rope for supporting an elevator car in an elevator installation, said synthetic fiber rope having strands, the strands being formed of twisted yarns and the yarns being formed of synthetic fibers, comprising:
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a core strand; at least one inner strand layer formed of a plurality of first strands surrounding said core strand and including at least one of said first strands being an indicator strand including at least one indicator fiber or at least one indicator yarn, said at least one indicator fiber or said at least one indicator yarn for monitoring a rope service life of said synthetic fiber rope when supporting said elevator car in said elevator installation, said at least one indicator yarn including indicator fibers and synthetic fibers, said at least one indicator fiber or said at least one indicator yarn being positioned internal of said indicator strand and participating in a spiral structure of the synthetic fibers or of the synthetic fiber yarn; an outer strand layer formed of a plurality of second strands surrounding said at least one inner strand layer wherein said first and second strands are each surrounded by a matrix material and said matrix material surrounding said indicator strand has a lower resistance to abrasion than said matrix material surrounding other ones of said first and second strands not including either of said at least one indicator fiber or said at least one indicator yarn; and wherein said indicator strand includes said at least one indicator yarn and not said at least one indicator fiber, and wherein a modulus of elasticity of the synthetic fibers of said indicator yarn is higher than a modulus of elasticity of the synthetic fibers of said another strand.
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Specification