WO2012049019A1 - Système d'entraînement d'un ascenseur sans contrepoids - Google Patents

Système d'entraînement d'un ascenseur sans contrepoids Download PDF

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Publication number
WO2012049019A1
WO2012049019A1 PCT/EP2011/066776 EP2011066776W WO2012049019A1 WO 2012049019 A1 WO2012049019 A1 WO 2012049019A1 EP 2011066776 W EP2011066776 W EP 2011066776W WO 2012049019 A1 WO2012049019 A1 WO 2012049019A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulleys
pulley
belt
cabin
carrying element
Prior art date
Application number
PCT/EP2011/066776
Other languages
English (en)
Inventor
Marco Hoerler
Omar Galli
Gabriel Fierri
Francesco Frosio
Simone Pellascio
Original Assignee
Kone Corporation
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 Corporation filed Critical Kone Corporation
Priority to ES11772909.5T priority Critical patent/ES2550212T3/es
Priority to EP11772909.5A priority patent/EP2627599B1/fr
Publication of WO2012049019A1 publication Critical patent/WO2012049019A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/04—Driving gear ; Details thereof, e.g. seals
    • B66B11/08—Driving gear ; Details thereof, e.g. seals with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0065—Roping
    • B66B11/007—Roping for counterweightless elevators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0065—Roping
    • B66B11/008—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave
    • B66B11/0085—Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave of rucksack elevators

Definitions

  • the present invention relates to the field of elevators, particularly elevators without counterweight and with a belt drive.
  • the invention relates more particularly to a system for driving an elevator without counterweight.
  • Elevators without counterweight essentially comprise a self-supporting structure, for example made with two lateral guides along which the cabin slides. Said cabin is moved by a suspension means which can be a cable or, more preferably, a belt.
  • the belt is a substantially flat and wide means of suspension, which can be made, for example, with steel wires incorporated in a matrix of a plastic material.
  • Elevators without counterweight are particularly suitable for small buildings and/or in buildings of historical value, wherein the installation of a conventional elevator with counterweight would be too expensive and/or invasive. Due to the lack of the counterweight, an adequate system is however necessary for the tensioning of the belt or of the belts to ensure adherence on the driving pulley. This system serves to adjust the working tension of the belt or of the belts to the value required and necessary for correct operation.
  • the systems of the prior art are generally inaccurate and/or require complex operations, for example they require access to different parts of the elevator including the cabin, and several changes of the position of the operator, which increase time and cost.
  • the tension of the belt is adjusted by acting on a fixed end part of the same belt. This procedure is however laborious since it requires to unscrew and rotate an attachment flange. Moreover the flange can be rotated by steps which are imposed by the position of the anchorage bolts, for example steps of 30 degrees, and therefore the adjustment is not accurate.
  • the object of the invention is to overcome the disadvantages described above, and make available a practical and accurate system of adjustment of the tension of belts in elevators without counterweight.
  • a system for driving a cabin of an elevator without counterweight comprising at least one suspension belt for said cabin and a plurality of pulleys, wherein said at least one belt is wound around said pulleys, the pulleys being arranged in stationary sets and mobile sets of pulleys, the pulleys of each set being substantially coplanar and having parallel rotation axes, said system being characterised in that it comprises at least one group for adjusting the tension of said at least one belt, said adjustment group being associated to a stationary set of pulleys, and comprising an anchoring part and a pulley-carrying element which supports said stationary set of pulleys, and means for the fine adjustment of a vertical distance between said pulley-carrying element and said anchoring part.
  • the sets of pulleys are defined as stationary sets or mobile sets in the following manner.
  • the mobile sets of pulleys move together with the cabin, while the stationary sets remain still, being normally associated to the load-bearing structure of the elevator.
  • Said pulley-carrying element preferably comprises a fixed point anchorage for one of the terminations of the belt, and the pulley or the pulleys which make up the respective stationary set of pulleys.
  • the sets of pulleys may also be represented by a single pulley, even if it is preferable that they comprise a plurality of pulleys (for example three) to provide the system with adequate ratio of multiplication of the force and, therefore, to allow use of a smaller motor for a given weight of the cabin.
  • the invention is substantially based on the principle of moving the group formed by the aforesaid pulley-carrying element towards, or away from, said anchoring part, Said anchoring part is fixed, being for example integral with the load-bearing structure. As a consequence, the tension of the belt is increased or relaxed, as will be made even clearer with the following description.
  • the pulley-carrying element and said anchoring part are connected by means of at least one elastic means and the fine adjustment means act by adjusting the elastic deformation of said elastic means, preferably by adjusting the compression of said elastic means.
  • the adjustment means comprise at least one pin of connection between said pulley-carrying element and said anchoring part, which is provided with a coaxial spring. Said spring is compressed between a reference plane integral with the anchoring part and a surface of axial thrust on the pin. By regulating the compression of the spring, therefore, it is possible to increase or reduce the tension of the suspension means which is wound around the pulleys.
  • the surface of axial thrust on the pin can be obtained, for example, with a washer restrained with a nut screwed at the end of the same pin, and which acts as adjustment element.
  • the drive system can comprise one belt or two or more belts.
  • the invention provides advantageously independent groups for adjustment of the tension of each belt.
  • An object of the invention is also an elevator without counterweight comprising the driving system described above.
  • the fine adjustment group is preferably located in the lower zone of the load-bearing and guide structure of the elevator, to allow optimal accessibility.
  • the adjustment group can however be located also in the upper zone of the elevator. In the latter case, it shall be considered that the adjustment group is also sensitive to the weight of the cabin.
  • the location in the lower zone is preferred because of the easier access and because adjustment is independent of the weight of the cabin.
  • the invention acts substantially by varying the distance between the pulley- carrying element and the anchoring part, and then by varying the tension of the belt.
  • the main advantages of the invention are the easy access to the tensioning and adjustment group and the precise adjustment of the tension.
  • the tension of the suspension means can be adjusted from a single point, for example in the lower zone of the elevator, which is easily accessed.
  • adjustment is simply performed by acting on a nut and, therefore, requires little time and has a notable precision.
  • Further advantages are the constructional simplicity and compact size.
  • Fig. 1 shows schematically an elevator without counterweight and with belt traction, according to a preferred embodiment of the invention
  • Fig. 2 shows the basic diagram of winding of the suspension belt of the elevator of Fig. 1 .
  • Fig. 3 shows a detail of the base of the elevator and relative group for adjustment of the tension of the belts, according to a preferred embodiment.
  • Fig. 4 shows, more particularly, the group for adjustment of the tension of the belts according to a preferred embodiment.
  • Fig. 5 is a side view of the group of Fig. 4.
  • Fig. 6 is a section of the group of Figs. 4 and 5.
  • Fig. 7 is a detail of Fig. 6. Detailed description of a preferred embodiment
  • FIG. 1 an elevator of the self-supporting type without counterweight is shown, which comprises a cabin 1 guided by a load-bearing structure represented essentially by lateral guides 2 connected by an upper crosspiece 3 and by a lower crosspiece 4.
  • the elevator comprises a driving system of the cabin 1 which substantially includes a first belt 5 and a second belt 6, which are wound around a series of pulleys, and a motor 7.
  • the presence of at least two belts, which operate substantially in parallel, is appropriate for reasons of safety and is normally laid down by law.
  • the pulleys are grouped together in stationary and mobile sets, as shown as an example in Fig. 2.
  • the driving system preferably comprises respective sets of dedicated pulleys for each belt. In the example there are therefore respective stationary and mobile sets of pulleys for the first belt 5 and for the second belt 6.
  • the pulleys are coplanar in a plane parallel to the direction of movement of the cabin 1 .
  • Each set of pulleys in particular comprises a plurality of pulleys of different diameter and aligned by decreasing size, from a pulley of greater diameter to a pulley of smaller diameter.
  • Fig. 2 shows schematically the winding of one of the belts, referring to the belt 5.
  • Said belt 5 has two fixed end parts at anchoring points P1 and P2, which are located for example at the crosspieces 3, 4 of the load-bearing structure.
  • the belt 5 winds, in sequence, around the pulleys from 101 to 1 12, until it reaches the opposite end part P2.
  • the pulleys 101 , 103 and 105 form a first mobile set associated to the cabin 1 ;
  • the pulleys 102, 104, 106 form a first stationary set;
  • the pulleys 107, 109, 1 1 1 form a second stationary set and the pulleys 108, 1 10, 1 12 form a second mobile set.
  • the pulley 107 is driven by the motor 10 with a reduction.
  • the presence of this reduction is optional and in other applications of the invention, for example, the traction may be direct, with reduction belt or with mechanical reduction (motor reducer).
  • the winding of the belt 6 is substantially similar and therefore is not described in detail.
  • the mobile pulley sets move and follow the cabin.
  • the winding of the belt around the various pulleys determines a factor of multiplication of the lifting force, according to a well-known principle.
  • Each set of pulleys comprises a plurality of coplanar pulleys, arranged by their diameter from a pulley of a maximum diameter to a pulley of a minimum diameter.
  • the lower stationary set of the belt 5 (Fig. 3) comprises the pulley 107, of a maximum diameter; said pulley 107 is coplanar to a pulley 109 of intermediate diameter, and to a pulley 1 1 1 of a smaller diameter.
  • Said lower stationary set is denoted by 10.
  • a group for adjustment of the tension of the belt 5 is associated to said set 10 of pulleys.
  • Said adjustment group (Fig. 3) essentially comprises an anchoring part 1 1 integral with the load-bearing structure of the elevator; a pulley-carrying element 12 which supports the pulleys 107, 109 and 1 1 1 , and appropriate means for the fine adjustment of a vertical distance between said pulley- carrying element 12 and said anchoring part 1 1 . Said distance is denoted as "d" in Figs. 4 and 7.
  • connection pin 14 provided with a coaxial helicoidal spring 13.
  • the spring is compressed between a plane of abutment of the anchoring part 1 1 and a surface of axial thrust on the pin 14.
  • the parallel belt 6 has a respective pulley-carrying element 12' connected to the frame, for example to the same anchoring part 1 1 , via a respective pin 14' with spring 13'. Therefore the description of the adjustment of the belt 5 is equally applicable to the adjustment of the belt 6.
  • Figs. 4 to 7 show a preferred embodiment wherein the anchoring part 1 1 is made with an attachment plate 15, represented as an L-shaped plate with reinforcement fin 15'.
  • the pulley-carrying element 12 is formed preferably by a plate 16 whereon a lid 17 is attached, forming a box-like structure, with a U shape, which encloses the pulleys.
  • the drawing also shows the flange 18 for anchoring of the respective end part P2 of the belt.
  • the pin 14 passes through a hole in the plate 15.
  • Said pin 14 has a head 19 (Fig. 7) abutting on a lower plane 20 of the pulley-carrying element 12 and an opposite free end 21 .
  • the spring 13 is coaxial to the pin and is compressed between a surface 22 of the attachment plate 15 and a washer 23 restrained by a nut 24, which forms the aforesaid surface of axial thrust on the pin.
  • Said nut 24 is screwed on an threaded end of the pin 14.
  • the spring 13 generates and maintains a certain tension in the belt 5 and said tension is finely adjustable by acting on the nut 24.
  • the elastic force of the spring 13 in fact is transferred to the washer 23 and consequently tends to push the pin 14 downwards in the drawing, i.e. the group formed by the element 12 and by the pulleys is moved closer to the plate 15, thereby generating a tension on the respective belt 5.
  • the pulleys support 12 moves close to the part 1 1 , i.e. the dimension d (Figs. 4-7) decreases.
  • the spring 13 is compressed and the tension of the belt 5 is increased.
  • the elastic behaviour of the spring 13 has an effect of recovery of the play or of the deformations (for example thermal) and helps maintaining the tension of the belt 5.
  • Adjustment of the belt 6 is identical, i.e. is performed by acting on a similar end nut of the pin 14', as is readily understood from Fig. 5.
  • the system therefore allows the independent adjustment of the tension of several belts, and allows keeping the same tension for example in belts 5 and 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

L'invention porte sur un système d'entraînement d'une cabine (1) d'un ascenseur sans contrepoids, lequel système comprend au moins un moyen de suspension (5, 6), tel qu'une courroie enroulée autour de poulies, les poulies étant agencées en ensembles de poulies respectivement immobiles et mobiles, sensiblement coplanaires, ayant des axes de rotation parallèles, la courroie ou chaque courroie comprenant un groupe pour l'ajustement de la tension qui est associé à un ensemble immobile de poulies (10), et comprend une partie d'ancrage (11, 15) et un élément de support de poulie (12) qui supporte ledit ensemble immobile de poulies (10), et des moyens (14) pour l'ajustement fin de la distance verticale entre ledit élément de support de poulie (12) et ladite partie d'ancrage (11).
PCT/EP2011/066776 2010-10-13 2011-09-27 Système d'entraînement d'un ascenseur sans contrepoids WO2012049019A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES11772909.5T ES2550212T3 (es) 2010-10-13 2011-09-27 Sistema para accionamiento de un ascensor sin contrapeso
EP11772909.5A EP2627599B1 (fr) 2010-10-13 2011-09-27 Système d'entraînement d'un ascenseur sans contrepoids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH16742010A CH703921A2 (it) 2010-10-13 2010-10-13 Sistema di azionamento per ascensore senza contrappeso.
CH01674/10 2010-10-13

Publications (1)

Publication Number Publication Date
WO2012049019A1 true WO2012049019A1 (fr) 2012-04-19

Family

ID=44862948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/066776 WO2012049019A1 (fr) 2010-10-13 2011-09-27 Système d'entraînement d'un ascenseur sans contrepoids

Country Status (4)

Country Link
EP (1) EP2627599B1 (fr)
CH (1) CH703921A2 (fr)
ES (1) ES2550212T3 (fr)
WO (1) WO2012049019A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US216568A (en) * 1879-06-17 Improvement in dumb-waiters
FR2921913A1 (fr) * 2007-10-08 2009-04-10 Emile Kadoche Ascenseur sans contrepoids motorisation embarquee dans l'etrier de la cabine du type a adherence
ES2326023A1 (es) * 2009-03-25 2009-09-28 Ascensores Johima, S.L Ascensor de polea diferencial.
WO2010037679A1 (fr) 2008-09-30 2010-04-08 Marco Hoerler Ascenseur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US216568A (en) * 1879-06-17 Improvement in dumb-waiters
FR2921913A1 (fr) * 2007-10-08 2009-04-10 Emile Kadoche Ascenseur sans contrepoids motorisation embarquee dans l'etrier de la cabine du type a adherence
WO2010037679A1 (fr) 2008-09-30 2010-04-08 Marco Hoerler Ascenseur
EP2185456A1 (fr) * 2008-09-30 2010-05-19 Marco Hoerler Ascenseur
ES2326023A1 (es) * 2009-03-25 2009-09-28 Ascensores Johima, S.L Ascensor de polea diferencial.

Also Published As

Publication number Publication date
EP2627599A1 (fr) 2013-08-21
EP2627599B1 (fr) 2015-07-15
CH703921A2 (it) 2012-04-13
ES2550212T3 (es) 2015-11-05

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