WO2011045825A1 - Système d'ascenseur à entraînement par courroie - Google Patents

Système d'ascenseur à entraînement par courroie Download PDF

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Publication number
WO2011045825A1
WO2011045825A1 PCT/IT2009/000588 IT2009000588W WO2011045825A1 WO 2011045825 A1 WO2011045825 A1 WO 2011045825A1 IT 2009000588 W IT2009000588 W IT 2009000588W WO 2011045825 A1 WO2011045825 A1 WO 2011045825A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulleys
pulley
self
supporting structure
mobile
Prior art date
Application number
PCT/IT2009/000588
Other languages
English (en)
Inventor
Giuseppe Volpe
Original Assignee
Igv Group S.P.A.
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 Igv Group S.P.A. filed Critical Igv Group S.P.A.
Publication of WO2011045825A1 publication Critical patent/WO2011045825A1/fr

Links

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
    • 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

Definitions

  • the present invention relates to elevators in general and, in particular, to an operating system with toothed belts and mobile pulleys for elevator cabins and elevator platforms.
  • Tackle-type elevators include an idle pulley mounted at the top of the cylinder situated at the side or in the rear of the hoistway; sliding over the pulley is a rope with one end fixed to the ground and the other to the car sling on the elevator cabin.
  • the upward-rising piston pushes the pulley that rolls along the rope; gearing-down increases cabin speed to double that of the piston.
  • Toothed-belt (non-hydraulic) systems without a counterweight and fitted with a self-supporting structure to create the pathway for an elevator platform, have recently appeared on the market.
  • An example of this is provided by the Italian patent application TO200A000720 entitled “Impianto elevatore a piattaforma” ("Platform elevator system”).
  • the gearmotor and shaft of the driving pulleys, as well as the shaft of the idle pulleys are connected to the vertical guide rails for the elevator platform.
  • the car sling supporting the elevator platform slides alongside the vertical guide rails.
  • the toothed belts form a closed ring-wise pathway on the car sling to which the two ends of each belt are rigidly fixed.
  • toothed belts closed ring- wise can be used, these too rigidly fixed to the car sling at various points on the ring.
  • Purpose of the invention is therefore to overcome the drawbacks mentioned in relation to toothed-belt elevators.
  • subject of the present invention is a system for operating elevator cabins or platform elevators by means of toothed belts, comprising: - a self-supporting structure substantially consisting of two vertical guide on which to slide the cabin or platform elevator joined by crosspieces at their two ends;
  • system further includes:
  • said toothed belt departing from one of the two fixing elements, hereinafter called rope anchorage, arbitrarily choosing the first one as a starting point, travels along said self-supporting structure:
  • the drive pulley together with its electrical operating apparatus can be placed either high up or low down in the self-supporting structure.
  • the shafts of the mobile pulleys fixed to the car sling can be situated at various distances one from another and varyingly positioned in height without any limit to the invention.
  • the belts do not form closed pathways.
  • the car sling translates at half speed compared with belt speed, and as the belts slide in relation to the car sling due to transmissions effected by the opposite mobile pulleys in the car sling, there can be no rigid constraints between car sling and toothed belts. It follows that the only areas of contact between toothed belts and car sling lie in the grooves in the mobile pulleys with the car sling. But as the belt translates in those grooves it provides no fixed area subject to stresses at its connection with the car sling, contrary to what is the case with the known art. This drastically reduces the likelihood of the belts becoming detached. Further, the grooves in the mobile pulleys can be smooth and house the toothed belt which does not therefore "engage”.
  • the open conformation of the toothed belts makes it possible to mount elastic systems on the two heads of each belt to favour uniform tensioning and maintain it as such; this can be done at the most suitable positions, namely at the top and bottom of the self-supporting structure.
  • Each belt can therefore be separately tensioned and doubly protected from shocks caused by sharp movements when the elevator reaches a floor or leaves it, this too lessening the risks of breakage or detachment.
  • Figure 1 is a functional schematization of the path followed by the toothed belts around the various pulleys employed in operating the present invention
  • Figure 2 is a view in perspective of the system shown in Figure 1, including the cabin;
  • Figure 3 is a view in perspective of the central part of the system in Figure 2, without the cabin, to show the car sling and how it is connected to the toothed belts by means of mobile pulleys with it;
  • Figure 4 is an enlarged view in perspective of the upper part of the system seen in Figure 2;
  • Figure 5 is an enlarged view in perspective of the lower part of the system seen in Figure 2.
  • Figure 1 shows in schematic form the route taken by a belt 1 (toothed) to move an elevator cabin 10 between a drive pulley 6 and an idle tension pulley 7, one pulley at each end of the travel.
  • One end 2 of belt 1 is fixed to a first rope anchorage 3 placed just below the drive pulley 6, and a second end 4 fixed to a second rope anchorage 5 just above the tension pulley 7.
  • the route taken by belt 1 between rope anchorages 3 and 5 passes through the drive pulley 6, through the idle tension pulley 7, and through two further pulleys 8 and 9 movable with the cabin 10.
  • the grooves in pulley 6 and in pulleys 7, 8 and 9 are toothed (but the grooves in pulleys 8 and 9 can be smooth) allowing the teeth on belt 1 to penetrate inside the grooves in the pulleys, engaging them as if they were gears.
  • the figure shows the cabin 10 at about halfway along its travel.
  • belt 2 descends for a certain length la until it reaches the mobile pulley 8 engaging its groove, rises for a length lb until it reaches the drive pulley 6 engaging its groove, descends again for a length lc until it reaches the tension pulley 7 engaging its groove, rises again for a length Id until it reaches the mobile pulley 9 engaging its groove, and finally once more descends for a length le towards the lower rope anchorage 5.
  • FIG. 1 realizes a tackle-type 2:1 system wherein, based solely on kinematic considerations in relation to a system by direct traction, it is found that cabin speed is halved compared with that using ropes (as if the direct system included gearing down of 2:1) permitting (a) the transportable load to be doubled, active torque and cabin speed being equal; (b) halving the active torque, transportable load and cabin speed being equal.
  • Figure 2 shows how the schematic view in Figure 1 can be realized. There are two vertical guide rails, 19, 20 that extend upwards to guide the up and down movement of the cabin 10 supported by the car sling 11 (of which only the upper part is visible).
  • Sliding blocks are present on the sides of the car sling for sliding along the guide rails 19 and 20.
  • the car sling 11 is connected to the toothed belt 1 as explained above, and is also similarly connected to a second toothed belt 12.
  • the toothed belts 1 and 12 are moved by two drive pulleys, respectively numbered 6 and 13, splined to the shaft 14 of a gearmotor 15 visible at the top of the guide rail 20.
  • the drive pulleys 6 and 13 are matched at the bottom by two tension pulleys 7 and 16, idle on a shaft 18 visible at the bottom of the guide rails 19 and 20.
  • Shafts 14 and 18 are sustained by the two vertical guide rails 19 and 20, one at the upper end and the other at the lower end.
  • the upper end of the toothed belt 12 is fixed to an upper rope anchorage 21, the lower end being fixed to a lower rope anchorage 22.
  • rope anchorages 2, 5, 21, and 22 are connected to helical-spring shock-absorbers in the order of: 23, 24, 25, and 26.
  • the upper shock-absorbers 23 and 25 are connected to a crosspiece 30 that joins the vertical guide rails 19 and 20 at the top.
  • the lower shock-absorbers 24 and 26 are connected to a crosspiece 31 joining these guide rails at the bottom.
  • the gearmotor 15 is also fixed to the same self-supporting structure.
  • FIG 3 shows the central area of the system illustrated in Figure 2, without the cabin 10 so that the structure of the car sling 11 may be seen, especially that part, not visible before, where the mobile pulleys are connected.
  • the car sling 11 is a frame that slides along the vertical guide rails 19 and 20, open at the front and comprising two strong parallel uprights 34 and 35, an upper crosspiece 36 joined by two right-angled arms 37 and 38 to the uprights 34 and 35.
  • Crosswise structures 39, 40, 41 are also fixed to said uprights.
  • two parallel shafts 45 and 47 are inserted and suitably spaced.
  • Two pulleys 8 and 44 are engaged on the shaft 45 in the space between the two uprights 34 and 35.
  • Two pulleys 9 and 46 are engaged on the shaft 47 also in the space between the two uprights 34 and 35.
  • the space between pulleys 8 and 44 is identical to that between all the other pairs of pulleys, so that the pulleys for each toothed belt are aligned along the same vertical line.
  • Shafts 45 and 47 are fixed in the walls of uprights 34 and 35 in the car sling 11 and the respective pulleys are idle on said shafts, so that each pulley can rotate independently.
  • This figure shows toothed belts 1 and 12 and, in the case of figure 1, the sections visible in that figure, namely: lb, la, lc, and sections Id, le, lc; similar sections can be seen in belt 12.
  • belt length la is fixed to the rope anchorage 3 in turn comiected to the spring 23 by a vertical rod 51 rigidly joined to rope anchorage 3 and, in the following order, passing through: a bored plate 50 supporting the spring 23, spring 23 axially and a plate 52 above spring 23 to which rod 51 is bolted.
  • a bored plate 50 supporting the spring 23, spring 23 axially and a plate 52 above spring 23 to which rod 51 is bolted.
  • the supporting plate 50 are two holes through which pass two vertical rods 53 bolted to plate 50 and uppermost to the crosspiece 30.
  • belt section 12a is fixed to the rope anchorage 21, in turn connected to the spring 25 by a vertical rod 57 rigidly joined to the rope anchorage 21 and through which pass, in the following order: a bored plate 56 supporting the spring 25, spring 25 axially, and a plate 58 above spring 25 to which the rod 57 is bolted.
  • a bored plate 56 supporting the spring 25, spring 25 axially
  • In the supporting plate 56 are two holes through which pass two vertical rods 59 bolted to the plate 56 and, uppermost, to the crosspiece 30.
  • the mechanisms here described pertaining to springs 23 and 25 form two identical shock-absorbers to counteract the stresses which belts 1 and 12 undergo when the cabin 10 suddenly accelerates or brakes.
  • the spring 23 is normally compressed by pressure which the plate 52 exerts on said spring through the rod 51 in opposition to the plate 50 maintained at a fixed distance from the crosspiece 30 by the two rods 53. The same happens in the case of the shock-absorber for belt 12.
  • Figure 5 illustrates the lower part of the traction system in Figure 2 showing the vertical guides 19 and 20 and the interconnecting crosspiece 31.
  • a frame 60 Centrally constrained to crosspiece 31 is a frame 60 to support the shaft 18 with the idle tension pulleys, 7 and 16, inside frame 60.
  • This frame also contains the shock- absorbers for toothed belts 1 and 12, identical one to another, and is closed uppermost by a crosswise wall 60a.
  • the mechanism includes a helical spring 24 crossed through axially by a rod 61 rigidly joined to the lower rope anchorage 5 and to a plate 62 under the spring 24, compressed by pressure from belt 1 against the fixed wall 60a.
  • the shock-absorbing mechanism includes the spring 26 through which a rod 63 passes axially to become rigidly joined to the lower rope anchorage 22 and to a plate 64 placed under spring 26, compressed by tension from belt 12 against the fixed wall 60a.
  • the system operates in exactly the same way as for the upper shock-absorbers.

Landscapes

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

Abstract

La présente invention concerne une structure autoportante destinée à des ascenseurs et à des plateformes élévatrices, s'installant à l'intérieur ou à l'extérieur de bâtiments, et comprenant deux guides verticaux réunis l'un à l'autre à chaque extrémité par des traverses. Un moteur à engrenages, comportant un arbre et deux poulies motrices clavetées, est monté à une extrémité de ladite structure, l'autre extrémité étant un arbre pourvu de deux poulies tendeuses. Deux autres arbres, destinés à deux autres paires de poulies mobiles, sont réunis à une élingue de cabine supportant la cabine ou la plateforme qui sont mobiles avec l'élingue de cabine. Des courroies crantées sont en prise entre des points fixes et les diverses poulies de façon à servir de support à l'élingue de cabine. La conformation de chaque courroie est du type palan ouvert 2:1; les courroies ne sont pas fixées à l'élingue de cabine par rapport à laquelle elles coulissent grâce aux transmissions créées par les poulies mobiles associées à ladite élingue de cabine.
PCT/IT2009/000588 2009-10-13 2009-12-29 Système d'ascenseur à entraînement par courroie WO2011045825A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001754A ITMI20091754A1 (it) 2009-10-13 2009-10-13 Sistema di azionamento a cinghie dentate e pulegge mobili per cabine di ascensore e piattaforme elevatrici
ITMI2009A001754 2009-10-13

Publications (1)

Publication Number Publication Date
WO2011045825A1 true WO2011045825A1 (fr) 2011-04-21

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PCT/IT2009/000588 WO2011045825A1 (fr) 2009-10-13 2009-12-29 Système d'ascenseur à entraînement par courroie

Country Status (2)

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IT (1) ITMI20091754A1 (fr)
WO (1) WO2011045825A1 (fr)

Cited By (1)

* 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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924154A1 (fr) * 1997-12-15 1999-06-23 France Elévateurs S.A. Dispositif pour déplacer une charge en hauteur, comprenant un organe d'entrainement sans fin logé dans un couloir
US20030057031A1 (en) * 2000-05-19 2003-03-27 Stephan Gottlieb Elevator system for the vertical transport of loads in an aircraft
WO2007053138A1 (fr) * 2005-11-02 2007-05-10 Otis Elevator Company Ensemble porteur d'ascenseur comprenant divers éléments porteurs de dimensions différentes
WO2008056026A1 (fr) * 2006-11-10 2008-05-15 Kone Corporation Ascenseur à poulie de traction sans contrepoids
EP1947048A1 (fr) * 2007-01-17 2008-07-23 Motala Hissar AB Moyen de commande d'ascenseur
WO2010037679A1 (fr) * 2008-09-30 2010-04-08 Marco Hoerler Ascenseur

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924154A1 (fr) * 1997-12-15 1999-06-23 France Elévateurs S.A. Dispositif pour déplacer une charge en hauteur, comprenant un organe d'entrainement sans fin logé dans un couloir
US20030057031A1 (en) * 2000-05-19 2003-03-27 Stephan Gottlieb Elevator system for the vertical transport of loads in an aircraft
WO2007053138A1 (fr) * 2005-11-02 2007-05-10 Otis Elevator Company Ensemble porteur d'ascenseur comprenant divers éléments porteurs de dimensions différentes
WO2008056026A1 (fr) * 2006-11-10 2008-05-15 Kone Corporation Ascenseur à poulie de traction sans contrepoids
EP1947048A1 (fr) * 2007-01-17 2008-07-23 Motala Hissar AB Moyen de commande d'ascenseur
WO2010037679A1 (fr) * 2008-09-30 2010-04-08 Marco Hoerler Ascenseur

Cited By (1)

* 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

Also Published As

Publication number Publication date
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