EP2480476B1 - Traction member for a counterweightless elevator - Google Patents

Traction member for a counterweightless elevator Download PDF

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Publication number
EP2480476B1
EP2480476B1 EP10740241.4A EP10740241A EP2480476B1 EP 2480476 B1 EP2480476 B1 EP 2480476B1 EP 10740241 A EP10740241 A EP 10740241A EP 2480476 B1 EP2480476 B1 EP 2480476B1
Authority
EP
European Patent Office
Prior art keywords
traction member
working surface
elevator
belt
traction
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.)
Not-in-force
Application number
EP10740241.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2480476A1 (en
Inventor
Marco Hoerler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kone Corp
Original Assignee
Kone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kone Corp filed Critical Kone Corp
Publication of EP2480476A1 publication Critical patent/EP2480476A1/en
Application granted granted Critical
Publication of EP2480476B1 publication Critical patent/EP2480476B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating
    • 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
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/22—Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes
    • 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 present invention relates to the technical field of traction members for elevators. More in detail, the invention relates to a self-centering traction member specifically adapted for use in a counterweight-less elevator.
  • the internal tensile ropes are made of a suitable, high-tensile material such as steel or a carbon fibre or similar.
  • GB-A-1362514 discloses a traction member for elevators having a number of steel cords encapsulated in a plastic medium.
  • EP-A-1153167 discloses a tension member for an elevator system comprising a car and a counterweight, the tension member having an aspect ratio of greater than one, defined as the ratio of tension member width w to thickness t (w/t), the tension member including load carrying ropes formed from metallic material encased within a common layer of coating, said layer defining an engagement surface for engaging a traction sheave.
  • the aforesaid flat traction members are generally preferred to ropes because they allow reducing the diameter of the traction pulleys.
  • the wires are distributed in the cross section of the flat traction member, instead to be twisted together to form a rope.
  • the applicable law generally prescribe a ratio between the diameter of the pulleys and the diameter of the rope. Is the traction member is a flat belt rather than a rope, the diameter of the pulleys can be smaller with the related advantages. It has been found that the flat traction members, however, pose the following technical problems and suffer the following drawbacks which are not yet completely solved.
  • a first problem is that the manufacturing process should preferably ensure that the internal high-tensile wires or strands lie in a plane and in a central region between the two surfaces of the flat traction member. This need makes the production process more complex, given that it implies the need to provide an accurate guide for the high-tensile wires or strands, during the step of melting the plastic material for encapsulation.
  • the present invention overcomes the above drawbacks of the prior art, providing a traction member according to claim 1.
  • the traction member has a plurality of tensile ropes encapsulated in a case, and is characterized in that said case has a substantially flat, non-working surface, and an opposite working surface, for contact with a sheave of the drive assembly of an elevator, said working surface being concave or convex, and in that the tensile ropes of said plurality of tensile ropes lie in a plane which is parallel to said non-working surface.
  • tensile rope is used with reference to an internal high-tensile reinforcement element of the traction member.
  • the tensile ropes may have a circular cross section (wires) or any non-circular cross section.
  • the tensile ropes are made of metal wires.
  • the tensile ropes are made of steel wires.
  • the tensile ropes are steel wires, having a diameter between 0.5 and 3 mm and more preferably they are distanced each other by 0.75 to 5 mm, most preferably 1 to 3 mm.
  • a further aspect of the invention provides that the ratio between the width L of the inventive traction member and height h of the arc formed by the concave working surface is in the range 2 to 100 and preferably in the range 2 to 50. In a preferred embodiment said ratio is close to 5.
  • the working surface may have protrusions adapted to engage corresponding recesses on a sheave.
  • a traction member according to the invention may have the form of a toothed belt.
  • the case may be made of a suitable plastic material, to provide encapsulation of the internal tensile ropes.
  • An object of the invention is also an elevator without counterweight, comprising a cabin, a drive system, and a traction member supporting said cabin, the traction member being in accordance with the above disclosure.
  • the traction member is adapted to use in a system without counterweight, such as a self-supporting home-lift.
  • counterweight such as a self-supporting home-lift.
  • the need to support both a car and a counterweight would require two working surfaces, or a twisting of the traction member, which however is not acceptable in practice, as it would cause rapid wearing.
  • the traction member has a smaller cross section in a central area, due to the concave shape of the working surface, reduces the need of plastic material for encapsulation, thus reducing weight and cost.
  • the arrangement of the tensile ropes in a surface parallel to the flat non-working surface is highly advantageous in terms of the manufacturing process, since said tensile ropes need to be positioned in a plane and not in a more complex arrangement.
  • a further and significant advantage is that the tensile ropes remain aligned in a plane, even when the traction member is in use and engaged with sheaves, so that they are subject to a substantially pure traction stress.
  • the traction member has a self-centering ability, due to the concave working surface.
  • Another advantage of the inventive traction member is a better adherence to the sheave, compared to ropes or conventional flat belts.
  • Figs. 1 to 3 relate to an embodiment of the invention, where a traction member for an elevator in made as a belt 201 having a non-working flat surface and an opposite concave or convex working surface.
  • the working surface is actually in contact with sheaves or pulleys during operation; the pulleys have preferably a contact surface with a corresponding convex or concave surface respectively, to engage the working surface of the belt.
  • Said belt 201 has a working concave surface 202 opposite to a non-working flat surface 203.
  • the belt 201 is internally reinforced with highly resistant wires 204 to 204 n which are disposed in a plane g-g parallel to the non-working plane surface 203.
  • the ratio between the width L of the belt 201 and height h of the arc formed by the concave working surface 202 is between 2 and 50.
  • the trace of the surface 202, as seen in Fig. 2 is an arc of a circle.
  • the wires 204 to 204 n are made of a material highly resistant to traction; preferably steel wires having a diameter between 0.5 and 2 mm are used, the distance f between two of said wires being preferably 1 to 3 mm.
  • the width L is between 5 and 200 mm and more preferably in the range 50 to 150 mm, especially for use in an elevator without counterweight.
  • Fig. 4 show a belt 201 with teeth 205 and 207 and a pulley 206 with teeth 207 adapted to engage teeth 205 of the working surface 202 of the belt 201.
  • a process for manufacturing the belt 201 comprises the steps of: arranging the reinforcing wires 204 to 204 n in the plane g-g, at a mutual distance of f, and moulding the belt 201 e.g. by injecting molten plastic material.
  • the manufacturing process is easier and less expensive due to the reinforcing wires being disposed in a plane, namely the plane g-g which is parallel to the flat non-working surface 203, rather than in a curved arrangement.
  • Fig. 5 discloses an exemplificative embodiment of a counterweight-less elevator that can be operated with a traction member according to the invention.
  • the elevator has a cabin 1 which is guided on two frame parts 2 and 3, and is provided with two suspension and support belts 4 and 5 passing around groups of coplanar pulleys.
  • a first belt 4 passes around four groups of pulleys 6 to 9, and a second belt 5 passes around another four groups of pulleys 6' to 9'.
  • Said belts 4 and 5 are for example in accordance with the above described embodiment of belt 201.
  • each group of pulleys is composed of two pulleys.
  • the pulleys of each group are denoted by the indexes a and b, for example the group 6 is formed by pulleys 6a and 6b.
  • the axes of pulleys of each group are parallel so that the pulleys are coplanar.
  • a motor 10 drives the pulleys 8a and 8'a by means of connecting axle 17.
  • the pulley 8a drives the belt 4 and the pulley 8'a drives the opposite belt 5.
  • the two support belts 4, 5, according to embodiments of the invention, are symmetrically arranged on one of the lateral walls 11, 12 or of the back wall 13 of the cabin 1.
  • the elevator of Fig. 5 is an example of a self-supporting elevator, since the cabin and the motor are supported by the frame parts 2 and 3 and no heavy structure is necessary. Hence the elevator is suitable for installation in small and residential buildings, without invasive civil works.
  • Fig. 6 discloses the use of the belt 201 in a single-belt elevator with a cabin 208.
  • the belt is located behind the back wall of the cabin 208 and passed around fixed and moving groups of pulleys.

Landscapes

  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP10740241.4A 2009-09-21 2010-08-10 Traction member for a counterweightless elevator Not-in-force EP2480476B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01457/09A CH701918A2 (it) 2009-09-21 2009-09-21 Cinghia di trasmissione autocentrante.
PCT/EP2010/061618 WO2011032787A1 (en) 2009-09-21 2010-08-10 Traction member for a counterweightless elevator

Publications (2)

Publication Number Publication Date
EP2480476A1 EP2480476A1 (en) 2012-08-01
EP2480476B1 true EP2480476B1 (en) 2015-01-28

Family

ID=42938594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10740241.4A Not-in-force EP2480476B1 (en) 2009-09-21 2010-08-10 Traction member for a counterweightless elevator

Country Status (5)

Country Link
EP (1) EP2480476B1 (es)
AR (1) AR078298A1 (es)
CH (1) CH701918A2 (es)
TW (1) TW201111265A (es)
WO (1) WO2011032787A1 (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2493990A (en) * 2011-08-26 2013-02-27 Electra Ltd Counterweightless lifting platform assembly
WO2013075751A1 (en) 2011-11-25 2013-05-30 Kone Corporation Power transmission belt
WO2016157105A1 (en) 2015-03-31 2016-10-06 Fisher & Paykel Healthcare Limited A user interface and system for supplying gases to an airway
SG11201901094YA (en) 2016-08-11 2019-03-28 Fisher & Paykel Healthcare Ltd A collapsible conduit, patient interface and headgear connector
CN106995176B (zh) * 2017-05-27 2022-09-13 浙江安家快速电梯有限公司 一种同步带强驱家用梯

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1362514A (en) 1970-03-16 1974-08-07 Teleflex Ltd Winches
FR2772360B1 (fr) * 1997-12-15 2000-02-18 France Elevateurs Dispositif pour deplacer une charge en hauteur, comprenant un organe d'entrainement sans fin loge dans un couloir
EP1153167B2 (en) 1998-12-22 2011-06-29 Otis Elevator Company Tension member for an elevator
CN101848852B (zh) * 2007-09-27 2014-09-10 奥蒂斯电梯公司 电梯承重部件
WO2010037679A1 (en) * 2008-09-30 2010-04-08 Marco Hoerler Elevator

Also Published As

Publication number Publication date
AR078298A1 (es) 2011-10-26
WO2011032787A1 (en) 2011-03-24
EP2480476A1 (en) 2012-08-01
CH701918A2 (it) 2011-03-31
TW201111265A (en) 2011-04-01

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