US20130167967A1 - Elevator Suspension and/or Driving Assembly Having at Least One Traction Surface Comprising Exposed Weave Fibers - Google Patents
Elevator Suspension and/or Driving Assembly Having at Least One Traction Surface Comprising Exposed Weave Fibers Download PDFInfo
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- US20130167967A1 US20130167967A1 US13/822,080 US201113822080A US2013167967A1 US 20130167967 A1 US20130167967 A1 US 20130167967A1 US 201113822080 A US201113822080 A US 201113822080A US 2013167967 A1 US2013167967 A1 US 2013167967A1
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- tension elements
- weave fibers
- load bearing
- bearing member
- weave
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/04—Rope bands
- D07B5/045—Belts comprising additional filaments for laterally interconnected load bearing members
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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
- B66B7/062—Belts
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
- D03D1/0094—Belts
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D11/00—Double or multi-ply fabrics not otherwise provided for
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/004—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft with weave pattern being non-standard or providing special effects
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/006—With additional leno yarn
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/43—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with differing diameters
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D41/00—Looms not otherwise provided for, e.g. for weaving chenille yarn; Details peculiar to these looms
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
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- 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
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/063—Load-responsive characteristics high strength
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2403/00—Details of fabric structure established in the fabric forming process
- D10B2403/02—Cross-sectional features
- D10B2403/024—Fabric incorporating additional compounds
- D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
- D10B2403/02411—Fabric incorporating additional compounds enhancing mechanical properties with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2403/00—Details of fabric structure established in the fabric forming process
- D10B2403/02—Cross-sectional features
- D10B2403/024—Fabric incorporating additional compounds
- D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
- D10B2403/02412—Fabric incorporating additional compounds enhancing mechanical properties including several arrays of unbent yarn, e.g. multiaxial fabrics
Definitions
- elongated load carrying members such as round ropes or flat belts.
- the load carrying members are used for driving or propulsion in elevator systems.
- Round steel ropes have been the industry standard for many years.
- More recently flat belts including a plurality of tension member cords substantially retained in a jacket have been used in elevator systems. While there are advantages associated with such belts in an elevator system, there are also challenges presented.
- one challenge presented by some elevator belts is achieving a desired amount of traction between the belt and a traction sheave that causes movement of the belt and thus the elevator car.
- Different approaches have been suggested to achieve particular traction characteristics on a surface of an elevator belt.
- One approach is shown in the Published International Application WO 2005/094255. In that document, a jacket includes a roughened surface to provide desired friction characteristics.
- An exemplary elongated elevator load bearing member includes a plurality of tension elements that extend along a length of the load bearing member.
- a plurality of weave fibers transverse to the tension elements are woven with the tension elements such that the weave fibers maintain a desired spacing and alignment of the tension elements relative to each other.
- the weave fibers at least partially cover the tension elements.
- the weave fibers are exposed and establish an exterior, traction surface of the load bearing member.
- An exemplary method of making an elongated load bearing member includes providing a plurality of tension elements that extend along a length of the load bearing member.
- a plurality of weave fibers are woven together with the tension elements to thereby maintain a desired spacing and alignment of the tension elements relative to each other.
- the weave fibers at least partially cover the tension elements.
- the weave fibers are exposed and establish an exterior, traction surface of the load bearing member.
- FIG. 1 schematically shows selected portions of an example elevator system.
- FIG. 2 diagrammatically illustrates an example load bearing member having weave fibers that are woven together with tension elements.
- FIG. 3 schematically shows one example weave pattern that includes weave fibers in more than one direction.
- FIG. 4 schematically shows another example that includes tension elements distributed throughout a woven belt.
- FIG. 1 schematically shows selected portions of an example traction elevator system 20 .
- the illustrated example is for discussion purposes only.
- Features of the elevator system 20 that are not required for an understanding of the present invention (e.g. guide rails, safeties, etc.) are not shown or discussed.
- Those skilled in the art will appreciate that the present invention could be used in a variety of elevator system configurations and not only the specific example shown in this Figure.
- This example includes an elevator car 22 coupled with a counterweight 24 by one or more elongated elevator load bearing members 30 in a 1:1 roping arrangement. Other roping arrangements, such as 2:1 or greater, are possible.
- the weight of the elevator car 22 and counterweight 24 is suspended by the elongated elevator load bearing members 30 .
- a traction sheave 31 A causes desired movement of the elongated elevator load bearing members 30 to achieve desired movement and placement of the elevator car 22 within the hoistway.
- the illustrated example elevator system 20 includes a deflector pulley 31 B as seen in FIG. 1 that also engages the elongated elevator load bearing members 30 .
- Other examples include one or more idler or diverter pulleys on the car 22 , the counterweight 24 or both (for example to provide an overslung or underslung roping arrangement) that also engage the elongated elevator load bearing members 30 .
- FIG. 2 illustrates an example elongated elevator load bearing member 30 .
- This example includes a plurality of tension elements 32 .
- the tension elements 32 are arranged generally parallel to each other and extend in a longitudinal direction that establishes a length dimension of the elongated elevator load bearing member 30 .
- a plurality of weave fibers 34 are woven together with the tension elements 32 .
- the weave fibers 34 and the tension elements 32 are woven together into a fabric that maintains the tension elements 32 in a desired orientation relative to each other. In other words, the weave fibers 34 substantially retain the tension elements 32 in position.
- the phrase “substantially retained” means that the weave fibers 34 sufficiently engage the tension elements 32 such that the tension elements 32 do not pull out of the weave and remain substantially stationary relative to the weave fibers 34 in use (e.g., when the elongated elevator load bearing member 30 is subject to a load encountered during use in an elevator system 20 with, potentially, an additional factor of safety).
- the weave fibers 34 in this example have a length that is transverse to the length or longitudinal direction of the tension elements 32 .
- the example load bearing member 30 includes an exterior, traction surface 36 on at least one side of the load bearing member 30 .
- the traction surface 36 is established by exposed weave fibers 34 .
- An “exposed” weave fiber 34 in most embodiments will not be exposed along its entire length.
- the weave fibers 34 are woven into the woven fabric of the load bearing member 30 so that portions of each fiber will be beneath other weave fibers 34 or the tension elements 32 .
- all of the weave fibers 34 are exposed on the exterior, traction surface 36 .
- the layers of the weave or the arrangement of the weave fibers 34 leaves at least some of the weave fibers 34 covered over by other weave fibers 34 . In such examples, only some of the weave fibers are exposed and establish the exterior, traction surface.
- the tension elements 32 are the primary load bearing structure of the elevator load bearing member 30 .
- the weave fibers 34 do not support the weight of the elevator car 22 or counterweight 24 . Nevertheless, the weave fibers 34 do form part of the load path.
- the weave fibers 34 directly transmit the traction forces between the traction sheave 31 and the elevator load bearing member 30 to the tension elements 32 because the weave fibers 34 are exposed at the traction surface 36 .
- the weave fibers 34 in some examples prevent the tension elements 32 from contacting any component that the traction surface 36 engages. For example, the tension elements 32 will not contact a surface on the traction sheave 31 as the load bearing member 30 wraps at least partially about the traction sheave 31 .
- the size of the weave fibers 34 , the material of the weave fibers 34 , the pattern of the weave fibers 34 or a combination of these is selected to ensure the desired spacing between the tension elements 32 and the traction surface 36 so that the tension elements 32 are protected from direct engagement with a component such as the traction sheave 31 .
- the weave fibers 34 in some examples cover more than 50% of the surface area of the tension elements 32 that faces in the same direction as the traction surface 36 .
- the tension elements 32 comprise a first material and the weave fibers 34 comprise a second, different material.
- the weave fibers 34 have a much smaller thickness or cross-sectional dimension compared to that of the tension elements 32 .
- the tension elements 32 are metallic, such as drawn steel, and the weave fibers 34 comprise non-metallic materials, such as polymers for example.
- the illustrated example tension elements 32 in FIG. 2 comprise metal cords each comprising wound wires.
- each tension element 32 remains in a generally planar orientation along its length while the weave fibers 34 are in various locations along the length of each weave fiber 34 .
- the weave fibers 34 are of a lighter weight compared to the tension elements 32 and the weave fibers 34 are manipulated during the weaving process to conform about the exterior of the tension elements.
- Each of the weave fibers 34 may be partially wrapped over the top (according to the drawing) of one of the tension elements, beneath an adjacent tension element 32 and over the top of the next.
- the tension elements 32 are held under tension during the weaving process, which keeps the tension elements 32 straight along the portion of their length with which the weave fibers 34 are being woven together.
- all of the tension elements 32 are aligned with each other in a generally parallel and generally co-planar arrangement.
- the weave fibers 34 maintain that desired alignment while allowing the load bearing member 30 to bend around sheaves in an elevator system.
- the weave fibers 34 maintain the desired relative orientations of the tension members 32 without requiring any external coating or jacket over the load bearing member 30 .
- the weave fibers 34 include or comprise an elastomer material that is useful for establishing the traction surface 36 .
- One example includes establishing weave fibers 34 of a desired material and then coating or impregnating the fibers with the elastomer material.
- Another example includes making each of the weave fibers 34 out of a plurality of filaments and including filaments made of the selected elastomer material within each of the weave fibers 34 .
- One example elastomer material comprises a urethane. Thermoplastic polyurethane is used in one example.
- the weave fibers 34 comprise yarn that is treated with a known sizing material.
- the sizing in some examples enhances the ability to weave the tension elements 32 and weave fibers together.
- the sizing in some examples enhances a wear characteristic of the weave fibers 34 such as minimizing fretting or fraying of the weave fibers during use in an elevator system.
- the sizing in some examples provides a desired traction characteristic on the traction surface 36 .
- FIG. 2 shows one such example pattern of the weave fibers 34 .
- the weave fibers 34 that are exposed on the exterior, traction surface 36 are aligned generally parallel to each other and generally perpendicular to the longitudinal direction of the tension elements 32 .
- FIG. 3 schematically illustrates another example weave pattern partially expanded to show the relative orientation of the weave fibers 34 relative to each other (the completed assembly would have weave fibers 34 and tension elements 32 much closer together similar to those shown in FIG. 2 ).
- some of the weave fibers 34 a are arranged generally perpendicular to the longitudinal direction or length of the tension elements 32 .
- Others of the weave fibers 34 b are arranged generally parallel to the tension elements 32 and generally perpendicular to the weave fibers 34 a .
- the example weave pattern of FIG. 3 will have a slightly different characteristic on the traction surface 36 when the weave fibers 34 b are included in a position where they are exposed on the traction surface 36 .
- the weave fibers 34 b are maintained only in spaces between the tension elements 32 and are not exposed so they do not have an impact on the contour or texture of the traction surface 36 .
- each of the tension elements 32 includes a coating 40 .
- the coating 40 is a protective coating to prevent corrosion of the material of the tension elements 32 .
- the coating 40 comprises an adhesive that facilitates the suitable positioning of, or bonding between, the weave fibers 34 and the exterior surface of the tension elements 32 .
- Still another example coating 40 comprises an elastomer that may be useful for protecting the material of the tension elements 32 during use in an elevator system.
- An elastomer coating 40 can also be useful for suitably positioning, or bonding, the weave fibers 34 in place with respect to the tension elements 32 if for example such a coating 40 is heated after the woven fabric is established.
- each tension element 32 comprises a plurality of wires formed into strands 32 A that are then wound together into a single cord.
- each tension element 32 comprises a plurality of individual load bearing strands 32 A or wires, for example.
- the tension elements 32 are distributed throughout the weave.
- the tension elements 32 in this example may be of the same size and characteristic as the individual wires or strands within a wound cord such as those included in the example of FIG. 2 .
- the tension elements 32 in an example like FIG. 4 may also be of a larger size.
- One example configuration like that shown in FIG. 4 includes discreet metal wires as the tension elements 32 .
- the metal wires have an outside diameter that is approximately equal to the outside diameter of the weave fibers 34 .
- the weave fibers 34 have a smaller diameter compared to that of the tension elements 32 .
- the disclosed examples provide a woven fabric as a basis for an elevator load bearing member. They provide the ability to realize an elevator load bearing member having a plurality of tension elements without requiring an application of a secondary or jacket material. Eliminating the requirement for a secondary coating or jacket enhances the economies of some manufacturing processes and eliminates features of such jackets that have come to be recognized as sources of challenges or drawbacks when they are in use in an elevator system.
- One feature of the disclosed examples is that using a weave to maintain the tension elements 32 in a desired position relative to each other instead of using a jacket provides more damping compared to the viscoelastic behavior present with urethane jackets. Providing more damping by using a weave instead of a jacket can reduce noise levels during elevator system operation.
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Abstract
An exemplary elongated elevator load bearing member includes a plurality of tension elements that extend along a length of the load bearing member. A plurality of weave fibers transverse to the tension elements are woven with the tension elements such that the weave fibers maintain a desired spacing and alignment of the tension elements relative to each other. The weave fibers at least partially cover the tension elements. The weave fibers are exposed and establish an exterior, traction surface of the load bearing member.
Description
- There are a variety of uses of elongated load carrying members such as round ropes or flat belts. One such use is to suspend the loads in elevator systems. The load carrying members are used for driving or propulsion in elevator systems. Round steel ropes have been the industry standard for many years. More recently flat belts including a plurality of tension member cords substantially retained in a jacket have been used in elevator systems. While there are advantages associated with such belts in an elevator system, there are also challenges presented.
- For example, one challenge presented by some elevator belts is achieving a desired amount of traction between the belt and a traction sheave that causes movement of the belt and thus the elevator car. Different approaches have been suggested to achieve particular traction characteristics on a surface of an elevator belt. One approach is shown in the Published International Application WO 2005/094255. In that document, a jacket includes a roughened surface to provide desired friction characteristics.
- Other challenges are associated with the techniques used to apply the jacket to the belt. Some such techniques result in features that are believed to be a cause of noise during elevator operation. Adding a jacket layer also adds cost and manufacturing complexities.
- An exemplary elongated elevator load bearing member includes a plurality of tension elements that extend along a length of the load bearing member. A plurality of weave fibers transverse to the tension elements are woven with the tension elements such that the weave fibers maintain a desired spacing and alignment of the tension elements relative to each other. The weave fibers at least partially cover the tension elements. The weave fibers are exposed and establish an exterior, traction surface of the load bearing member.
- An exemplary method of making an elongated load bearing member includes providing a plurality of tension elements that extend along a length of the load bearing member. A plurality of weave fibers are woven together with the tension elements to thereby maintain a desired spacing and alignment of the tension elements relative to each other. The weave fibers at least partially cover the tension elements. The weave fibers are exposed and establish an exterior, traction surface of the load bearing member.
- The various features and advantages of the disclosed examples will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.
-
FIG. 1 schematically shows selected portions of an example elevator system. -
FIG. 2 diagrammatically illustrates an example load bearing member having weave fibers that are woven together with tension elements. -
FIG. 3 schematically shows one example weave pattern that includes weave fibers in more than one direction. -
FIG. 4 schematically shows another example that includes tension elements distributed throughout a woven belt. -
FIG. 1 schematically shows selected portions of an exampletraction elevator system 20. The illustrated example is for discussion purposes only. Features of theelevator system 20 that are not required for an understanding of the present invention (e.g. guide rails, safeties, etc.) are not shown or discussed. Those skilled in the art will appreciate that the present invention could be used in a variety of elevator system configurations and not only the specific example shown in this Figure. This example includes anelevator car 22 coupled with acounterweight 24 by one or more elongated elevatorload bearing members 30 in a 1:1 roping arrangement. Other roping arrangements, such as 2:1 or greater, are possible. The weight of theelevator car 22 andcounterweight 24 is suspended by the elongated elevatorload bearing members 30. - A
traction sheave 31A causes desired movement of the elongated elevatorload bearing members 30 to achieve desired movement and placement of theelevator car 22 within the hoistway. The illustratedexample elevator system 20 includes adeflector pulley 31B as seen inFIG. 1 that also engages the elongated elevatorload bearing members 30. Other examples include one or more idler or diverter pulleys on thecar 22, thecounterweight 24 or both (for example to provide an overslung or underslung roping arrangement) that also engage the elongated elevatorload bearing members 30. -
FIG. 2 illustrates an example elongated elevatorload bearing member 30. This example includes a plurality oftension elements 32. As can be appreciated from the drawing, thetension elements 32 are arranged generally parallel to each other and extend in a longitudinal direction that establishes a length dimension of the elongated elevatorload bearing member 30. A plurality ofweave fibers 34 are woven together with thetension elements 32. In this example, theweave fibers 34 and thetension elements 32 are woven together into a fabric that maintains thetension elements 32 in a desired orientation relative to each other. In other words, theweave fibers 34 substantially retain thetension elements 32 in position. The phrase “substantially retained” means that theweave fibers 34 sufficiently engage thetension elements 32 such that thetension elements 32 do not pull out of the weave and remain substantially stationary relative to theweave fibers 34 in use (e.g., when the elongated elevatorload bearing member 30 is subject to a load encountered during use in anelevator system 20 with, potentially, an additional factor of safety). Theweave fibers 34 in this example have a length that is transverse to the length or longitudinal direction of thetension elements 32. - The example
load bearing member 30 includes an exterior,traction surface 36 on at least one side of theload bearing member 30. Thetraction surface 36 is established by exposedweave fibers 34. An “exposed”weave fiber 34 in most embodiments will not be exposed along its entire length. Theweave fibers 34 are woven into the woven fabric of theload bearing member 30 so that portions of each fiber will be beneathother weave fibers 34 or thetension elements 32. - In the illustrated example, all of the
weave fibers 34 are exposed on the exterior,traction surface 36. In some examples, the layers of the weave or the arrangement of theweave fibers 34 leaves at least some of theweave fibers 34 covered over byother weave fibers 34. In such examples, only some of the weave fibers are exposed and establish the exterior, traction surface. - The
tension elements 32 are the primary load bearing structure of the elevatorload bearing member 30. In some examples, theweave fibers 34 do not support the weight of theelevator car 22 orcounterweight 24. Nevertheless, theweave fibers 34 do form part of the load path. Theweave fibers 34 directly transmit the traction forces between the traction sheave 31 and the elevatorload bearing member 30 to thetension elements 32 because theweave fibers 34 are exposed at thetraction surface 36. - The
weave fibers 34 in some examples prevent thetension elements 32 from contacting any component that thetraction surface 36 engages. For example, thetension elements 32 will not contact a surface on the traction sheave 31 as theload bearing member 30 wraps at least partially about the traction sheave 31. The size of theweave fibers 34, the material of theweave fibers 34, the pattern of theweave fibers 34 or a combination of these is selected to ensure the desired spacing between thetension elements 32 and thetraction surface 36 so that thetension elements 32 are protected from direct engagement with a component such as the traction sheave 31. Theweave fibers 34 in some examples cover more than 50% of the surface area of thetension elements 32 that faces in the same direction as thetraction surface 36. - In one example the
tension elements 32 comprise a first material and theweave fibers 34 comprise a second, different material. In the illustrated example, theweave fibers 34 have a much smaller thickness or cross-sectional dimension compared to that of thetension elements 32. In one example thetension elements 32 are metallic, such as drawn steel, and theweave fibers 34 comprise non-metallic materials, such as polymers for example. The illustratedexample tension elements 32 inFIG. 2 comprise metal cords each comprising wound wires. - As a result of the weaving process in this example, each
tension element 32 remains in a generally planar orientation along its length while theweave fibers 34 are in various locations along the length of eachweave fiber 34. Theweave fibers 34 are of a lighter weight compared to thetension elements 32 and theweave fibers 34 are manipulated during the weaving process to conform about the exterior of the tension elements. Each of theweave fibers 34 may be partially wrapped over the top (according to the drawing) of one of the tension elements, beneath anadjacent tension element 32 and over the top of the next. In some examples, thetension elements 32 are held under tension during the weaving process, which keeps thetension elements 32 straight along the portion of their length with which theweave fibers 34 are being woven together. - In the illustrated example, all of the
tension elements 32 are aligned with each other in a generally parallel and generally co-planar arrangement. Theweave fibers 34 maintain that desired alignment while allowing theload bearing member 30 to bend around sheaves in an elevator system. Theweave fibers 34 maintain the desired relative orientations of thetension members 32 without requiring any external coating or jacket over theload bearing member 30. - In some examples, the
weave fibers 34 include or comprise an elastomer material that is useful for establishing thetraction surface 36. One example includes establishingweave fibers 34 of a desired material and then coating or impregnating the fibers with the elastomer material. Another example includes making each of theweave fibers 34 out of a plurality of filaments and including filaments made of the selected elastomer material within each of theweave fibers 34. One example elastomer material comprises a urethane. Thermoplastic polyurethane is used in one example. - In some examples, the
weave fibers 34 comprise yarn that is treated with a known sizing material. The sizing in some examples enhances the ability to weave thetension elements 32 and weave fibers together. The sizing in some examples enhances a wear characteristic of theweave fibers 34 such as minimizing fretting or fraying of the weave fibers during use in an elevator system. The sizing in some examples provides a desired traction characteristic on thetraction surface 36. - A variety of different weave patterns can be used to weave together the
weave fibers 34 and thetension elements 32.FIG. 2 shows one such example pattern of theweave fibers 34. In this example, theweave fibers 34 that are exposed on the exterior,traction surface 36 are aligned generally parallel to each other and generally perpendicular to the longitudinal direction of thetension elements 32. -
FIG. 3 schematically illustrates another example weave pattern partially expanded to show the relative orientation of theweave fibers 34 relative to each other (the completed assembly would haveweave fibers 34 andtension elements 32 much closer together similar to those shown inFIG. 2 ). In this example, some of theweave fibers 34 a are arranged generally perpendicular to the longitudinal direction or length of thetension elements 32. Others of theweave fibers 34 b are arranged generally parallel to thetension elements 32 and generally perpendicular to theweave fibers 34 a. As can be appreciated by comparingFIG. 2 toFIG. 3 , the example weave pattern ofFIG. 3 will have a slightly different characteristic on thetraction surface 36 when theweave fibers 34 b are included in a position where they are exposed on thetraction surface 36. In another example, theweave fibers 34 b are maintained only in spaces between thetension elements 32 and are not exposed so they do not have an impact on the contour or texture of thetraction surface 36. - One feature of the example of
FIG. 3 is that each of thetension elements 32 includes acoating 40. In one example, thecoating 40 is a protective coating to prevent corrosion of the material of thetension elements 32. In another example, thecoating 40 comprises an adhesive that facilitates the suitable positioning of, or bonding between, theweave fibers 34 and the exterior surface of thetension elements 32. Still anotherexample coating 40 comprises an elastomer that may be useful for protecting the material of thetension elements 32 during use in an elevator system. Anelastomer coating 40 can also be useful for suitably positioning, or bonding, theweave fibers 34 in place with respect to thetension elements 32 if for example such acoating 40 is heated after the woven fabric is established. - In the example of
FIG. 2 , eachtension element 32 comprises a plurality of wires formed intostrands 32A that are then wound together into a single cord. In that example, eachtension element 32 comprises a plurality of individualload bearing strands 32A or wires, for example. In the example shown inFIG. 4 , thetension elements 32 are distributed throughout the weave. Thetension elements 32 in this example may be of the same size and characteristic as the individual wires or strands within a wound cord such as those included in the example ofFIG. 2 . Thetension elements 32 in an example likeFIG. 4 may also be of a larger size. - One example configuration like that shown in
FIG. 4 includes discreet metal wires as thetension elements 32. In one such example, the metal wires have an outside diameter that is approximately equal to the outside diameter of theweave fibers 34. In another example, theweave fibers 34 have a smaller diameter compared to that of thetension elements 32. - The disclosed examples provide a woven fabric as a basis for an elevator load bearing member. They provide the ability to realize an elevator load bearing member having a plurality of tension elements without requiring an application of a secondary or jacket material. Eliminating the requirement for a secondary coating or jacket enhances the economies of some manufacturing processes and eliminates features of such jackets that have come to be recognized as sources of challenges or drawbacks when they are in use in an elevator system.
- One feature of the disclosed examples is that using a weave to maintain the
tension elements 32 in a desired position relative to each other instead of using a jacket provides more damping compared to the viscoelastic behavior present with urethane jackets. Providing more damping by using a weave instead of a jacket can reduce noise levels during elevator system operation. - The preceding description is exemplary rather than limiting in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this invention. The scope of legal protection given to this invention can only be determined by studying the following claims.
Claims (20)
1. An elongated elevator load bearing member of a traction elevator system, comprising:
a plurality of tension elements that extend along a length of the load bearing member; and
a plurality of weave fibers transverse to the tension elements and woven with the tension elements, the weave fibers maintaining a desired spacing and alignment of the tension elements relative to each other, the weave fibers at least partially covering the tension elements, the weave fibers being exposed and establishing an exterior, traction surface of the load bearing member.
2. The elongated elevator load bearing member of claim 1 , wherein the weave fibers have a thickness sufficient to prevent the tension elements from contacting a component that the traction surface engages.
3. The elongated elevator load bearing member of claim 1 , wherein weave fibers are arranged in a pattern that comprises a predetermined spacing between the weave fibers that establishes a surface area of coverage over the tension elements sufficient to prevent the tension elements from contacting a component that the traction surface engages.
4. The elongated elevator load bearing member of claim 1 , wherein the tension elements comprise a first material and the weave fibers comprise a second, different material.
5. The elongated elevator load bearing member of claim 4 , wherein the tension elements comprise metal and the weave fibers are non-metallic.
6. The elongated elevator load bearing member of claim 1 , wherein the weave fibers comprise yarn and sizing.
7. The elongated elevator load bearing member of claim 1 , wherein the weave fibers comprise yarn impregnated with an elastomer material.
8. The elongated elevator load bearing member of claim 1 , wherein the tension elements are at least partially coated with an adhesive coating on the tension elements, the weave fibers contacting the adhesive coating.
9. The elongated elevator load bearing member of claim 1 , wherein the tension elements are at least partially coated with an elastomer material.
10. The elongated elevator load bearing member of claim 1 , wherein the weave fibers have a first outside dimension and the tension member have a second, larger outside dimension.
11. A method of making an elongated elevator load bearing member of a traction elevator system, comprising the steps of:
providing a plurality of tension elements; and
weaving a plurality of weave fibers together with the tension elements to thereby
(i) maintain a desired spacing and alignment of the tension elements relative to each other,
(ii) at least partially cover the tension elements, and
(iii) establish an exterior, traction surface of the load bearing member comprising exposed ones of the weave fibers.
12. The method of claim 11 , comprising
at least partially covering the tension elements with the weave fibers that have a thickness sufficient to prevent the tension elements from contacting a component that the traction surface engages.
13. The method of claim 11 , comprising
at least partially covering the tension elements using a weave pattern that comprises a predetermined spacing between the weave fibers that establishes a surface area of coverage over the tension elements sufficient to prevent the tension elements from contacting a component that the traction surface engages.
14. The method of claim 11 , wherein the tension elements comprise a first material and the weave fibers comprise a second, different material.
15. The method of claim 14 , wherein the tension elements comprise metal and the weave fibers are non-metallic.
16. The method of claim 11 , wherein the weave fibers comprise yarn and sizing.
17. The method of claim 11 , wherein the weave fibers comprise yarn impregnated with an elastomer material.
18. The method of claim 11 , wherein the tension elements are at least partially coated with an adhesive coating prior to the weaving.
19. The method of claim 11 , wherein the tension elements are at least partially coated with an elastomer material prior to the weaving.
20. The method of claim 11 , wherein the weave fibers have a first outside dimension and the tension member have a second, larger outside dimension.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013529135A JP5735651B2 (en) | 2010-09-20 | 2011-01-19 | Elevator suspension / drive assembly having at least one traction surface with exposed textile fibers |
US13/822,080 US20130167967A1 (en) | 2010-09-20 | 2011-01-19 | Elevator Suspension and/or Driving Assembly Having at Least One Traction Surface Comprising Exposed Weave Fibers |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2010/049433 WO2011142775A1 (en) | 2010-05-13 | 2010-09-20 | Elevator suspension and/or driving assembly having at least one traction surface defined by weave fibers |
PCT/US2011/021602 WO2012039781A1 (en) | 2010-09-20 | 2011-01-19 | Elevator suspension and/or driving assembly having at least one traction surface comprising exposed weave fibers |
US13/822,080 US20130167967A1 (en) | 2010-09-20 | 2011-01-19 | Elevator Suspension and/or Driving Assembly Having at Least One Traction Surface Comprising Exposed Weave Fibers |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2010/049433 Continuation-In-Part WO2011142775A1 (en) | 2010-05-13 | 2010-09-20 | Elevator suspension and/or driving assembly having at least one traction surface defined by weave fibers |
PCT/US2011/021602 A-371-Of-International WO2012039781A1 (en) | 2010-05-13 | 2011-01-19 | Elevator suspension and/or driving assembly having at least one traction surface comprising exposed weave fibers |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/822,419 Division US11193220B2 (en) | 2010-05-13 | 2017-11-27 | Elevator suspension and/or driving assembly having at least one traction surface comprising exposed weave fibers |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130167967A1 true US20130167967A1 (en) | 2013-07-04 |
Family
ID=48693888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/822,080 Abandoned US20130167967A1 (en) | 2010-09-20 | 2011-01-19 | Elevator Suspension and/or Driving Assembly Having at Least One Traction Surface Comprising Exposed Weave Fibers |
Country Status (2)
Country | Link |
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US (1) | US20130167967A1 (en) |
JP (1) | JP5735651B2 (en) |
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CN103741371A (en) * | 2013-12-20 | 2014-04-23 | 苏州鑫帛泰纺织科研有限公司 | Square braided rope |
EP3447020A1 (en) * | 2017-08-25 | 2019-02-27 | Otis Elevator Company | Self-extinguishing fabric belt for elevator system |
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US20200318286A1 (en) * | 2019-04-08 | 2020-10-08 | Otis Elevator Company | Elevator load bearing member having a fabric structure |
US10926976B2 (en) * | 2018-06-18 | 2021-02-23 | Otis Elevator Company | Belt with corrugated material |
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US11753276B2 (en) * | 2019-06-04 | 2023-09-12 | Otis Elevator Company | Elevator load bearing member having a fabric structure |
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CN103741371A (en) * | 2013-12-20 | 2014-04-23 | 苏州鑫帛泰纺织科研有限公司 | Square braided rope |
US11465885B2 (en) * | 2016-03-09 | 2022-10-11 | Otis Elevator Company | Reinforced fabric elevator belt with improved internal wear resistance |
EP3447020A1 (en) * | 2017-08-25 | 2019-02-27 | Otis Elevator Company | Self-extinguishing fabric belt for elevator system |
US20190062114A1 (en) * | 2017-08-25 | 2019-02-28 | Otis Elevator Company | Self-extinguishing load bearing member for elevator system |
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KR20190022398A (en) * | 2017-08-25 | 2019-03-06 | 오티스 엘리베이터 컴파니 | Self-extinguishing fabric belt for elevator system |
US10549952B2 (en) * | 2017-08-25 | 2020-02-04 | Otis Elevator Company | Self-extinguishing fabric belt for elevator system |
AU2018220098B2 (en) * | 2017-08-25 | 2023-12-14 | Otis Elevator Company | Self-extinguishing fabric belt for elevator system |
KR102574228B1 (en) | 2017-08-25 | 2023-09-05 | 오티스 엘리베이터 컴파니 | Self-extinguishing fabric belt for elevator system |
US11485612B2 (en) * | 2018-06-18 | 2022-11-01 | Otis Elevator Company | Belt with corrugated material |
US10926976B2 (en) * | 2018-06-18 | 2021-02-23 | Otis Elevator Company | Belt with corrugated material |
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US20200318286A1 (en) * | 2019-04-08 | 2020-10-08 | Otis Elevator Company | Elevator load bearing member having a fabric structure |
Also Published As
Publication number | Publication date |
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JP5735651B2 (en) | 2015-06-17 |
JP2013542897A (en) | 2013-11-28 |
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AS | Assignment |
Owner name: OTIS ELEVATOR COMPANY, CONNECTICUT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WESSON, JOHN P.;KRISHNAN, GOPAL R.;DEVALVE, TIMOTHY D.;AND OTHERS;SIGNING DATES FROM 20101221 TO 20110117;REEL/FRAME:029961/0023 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |