CH703168A2 - Refinement of suspension and safety shutdown system for the cab of an elevator without counterweight. - Google Patents

Refinement of suspension and safety shutdown system for the cab of an elevator without counterweight. Download PDF

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Publication number
CH703168A2
CH703168A2 CH7782010A CH7782010A CH703168A2 CH 703168 A2 CH703168 A2 CH 703168A2 CH 7782010 A CH7782010 A CH 7782010A CH 7782010 A CH7782010 A CH 7782010A CH 703168 A2 CH703168 A2 CH 703168A2
Authority
CH
Switzerland
Prior art keywords
assembly
fixed
carriage
suspension
cabin
Prior art date
Application number
CH7782010A
Other languages
Italian (it)
Inventor
Omar Galli
Marco Hoerler
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
Priority to CH7782010A priority Critical patent/CH703168A2/en
Publication of CH703168A2 publication Critical patent/CH703168A2/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0065Roping
    • B66B11/008Roping with hoisting rope or cable operated by frictional engagement with a winding drum or sheave

Abstract

Lift comprising a fixed structure (2) and a cabin (1), a suspension system comprising at least one suspension means (3) wound on pulleys (4) and a carriage (5) for driving said cabin (1), in wherein said carriage comprises a fixed assembly integral with the cabin (1) and a suspended assembly and in which at least one damping system is present between said fixed assembly and said suspended assembly, of the carriage.

Description

[0001] The present invention relates to the lift technique. The invention relates in particular to an improvement in the suspension and safety stop system for the cabin of a self-supporting elevator without counterweight.
[0002] It is known that an elevator must be equipped with a safety brake capable of stopping the car in case of speeding or in any case a malfunction. This safety system is commonly referred to as the "parachute" brake. In the event of the intervention of said parachute brake, the cabin locks almost instantaneously, and the kinetic energy of the moving mass is discharged on the guide structure, causing high stresses and / or strong vibrations. Furthermore, the abrupt stop affects passengers on board the cabin.
[0003] The object of the present invention is to solve this problem. The purpose in particular is to devise a system to prevent the intervention of the safety brake from triggering sudden stresses and / or vibrations on the cabin.
[0004] This object is achieved with a lift without a counterweight according to the attached independent claim no. 1. Some preferred embodiments are described in the dependent claims.
[0005] In a preferred form, the cab is suspended from a rope or belt by means of a group called a carriage; said carriage essentially comprises a fixed assembly which is stably anchored to the cab, and an assembly which is elastically suspended to the fixed assembly, not being constrained directly to the cab. At least one respective pulley or a respective group of pulleys are associated with said fixed assembly and with said suspended assembly of the carriage. The suspension means wraps around said pulleys or groups of pulleys of the fixed assembly and of the suspended assembly. The suspension means can be represented by one or more ropes or straps. In a preferred embodiment, said suspension means is represented by a belt.
[0006] The suspended assembly of the trolley is elastically connected to the fixed assembly by at least one spring or equivalent elastic means. In an exemplary embodiment of the invention, the two assemblies are connected by sliding pins contrasted by respective coaxial springs.
[0007] According to the invention, at least one damping system is provided between said fixed assembly and said suspended assembly of the carriage. The abrupt stop of the cabin, following a parachute brake intervention, tends to move the fixed assembly and the moving assembly of the trolley away from each other or closer together, respectively if the brake intervenes during the descent or ascent of the cabin. The damping system has a damping function which makes the car stop less abrupt, and prevents the triggering of annoying vibrations for the occupants or which could be dangerous for the integrity of the driving and suspension system, causing permanent damage to vital parts elevator.
[0008] Further advantages of the invention are: the compactness of the solution, the constructive simplicity, the reduced implementation time. At each intervention of the parachute brake, the damping system absorbs the inertia and therefore the kinetic energy of the moving mass, protecting the constructive parts of the lift. The arrest due to the intervention of the parachute brake, thanks to the invention, is also less brusque is more bearable by any passengers on board the cabin.
[0009] These and other advantages of the invention will be more clear below, with the help of the description of some preferred but non-limiting embodiments, in which: fig. 1 shows schematically a lift without counterweight, according to a preferred embodiment of the invention; fig. 2 <sep> shows the detail "B" of the lift truck of fig. 1, in side view, fig. 3 shows a front view of the carriage of fig. 2, the fig. 4 and 5 show a variant of the invention with a double shock absorber.
[0010] With reference to the figures, there is shown a lift de! self-supporting type without counterweight, which comprises a cabin 1 guided by a supporting structure represented essentially by lateral guides 2 connected by upper and lower cross members 2A, 2B. The booth 1 is suspended from a belt 3, wound around pulleys 4. More particularly, the booth 1 is suspended from a carriage 5 which supports some of the pulleys around which the belt 3 is wound.
[0011] The pulleys 4 are arranged in fixed and mobile groups. Fixed groups of pulleys are integral with the supporting structure, and mobile units are associated with the carriage 5, following the movement of the cabin 1. In the example, two sets of fixed pulleys are associated respectively with the upper and lower cross members 2A, 2B, and two groups of movable pulleys are associated with the carriage 5.
[0012] Preferably, the pulleys of each group are coplanar in a plane parallel to the direction of movement of the cab; more preferably, each group comprises a plurality of pulleys of different diameters and aligned by decreasing dimensions, from a pulley of greater diameter to a shorter-diameter pulley, as shown in the figures and in particular in Fig. 3e 5.
[0013] The belt 3 winds around the pulleys 4, between two fixed end points. A motor (not shown) drives a driving pulley, for example one of the pulleys 4 of a fixed unit integral with the crosspiece 2A or 2B.
[0014] The trolley 5, according to one of the embodiments of the invention, is shown in more detail in Figs. 2 and 3. The carriage 5 essentially comprises an assembly 5a associated with the cab 1, and an assembly 5b which is elastically suspended to the assembly 5a, not being directly anchored to the cab itself.
[0015] Referring more specifically to fig. 2, the fixed assembly 5a comprises a plate 6, fixed to the rear wall of the booth 1. Said plate 6 carries a first group of three coplanar pulleys 4 of decreasing diameter, as shown in fig. 3. The suspended assembly comprises, a plate 7 which carries another group of three coplanar pulleys 4 of decreasing diameter.
[0016] The plates 6 and 7 are connected by two pins 8A each contrasted by a coaxial spring 8, which is preloaded with a defined compression. In this way the system maintains an adequate tension of the belt 3 and acts as a compensation system. In particular, the spring 8 is opposed to a mutual distance between the plates 6 and 7.
[0017] According to the invention, a shock-absorbing system connects the two assemblies 5a and 5b together. In the example of fig. 2 and 3, a damping system 20 connects the fixed plate 6 to the suspended plate 7. The damping system 20 reacts with a force proportional to the relative speed that exists between the two plates 6 and 7, with effect of damping the vibrations of the springs 8.
[0018] In fig. 2 and 3 said damping system 20 is made with a cylinder 21 integral with the assembly 5b, and a piston 22 slidable in the cylinder 21 and with the end integral with the assembly 5a. The stroke of the piston 22 in the cylinder 21 is opposed by a suitable means (oil, gas or other) which provides the damping effect.
[0019] Realizations of the invention are possible with more than one damping system. In another embodiment of the invention, shown in figs. 4 and 5, two shock absorbers 20 are provided on opposite sides of the carriage 5. This configuration with double shock absorber is further advantageous because it provides a more precise guide than the assembly 5b with respect to the fixed assembly 5a and avoids the birth of a bending moment.

Claims (5)

1. Lift without counterweight comprising a fixed structure (2) and a cabin (1), a suspension system comprising at least one suspension means (3) wound on pulleys (4) and a carriage (5) for driving said cabin ( 1), characterized in that said carriage comprises a fixed assembly (5a) which is rigidly connected to the cabin, and a suspended assembly (5b) which is elastically connected to said fixed assembly, in which at least one respective pulley (4) is associated to said fixed assembly and at least another respective pulley is associated with said moving assembly of the carriage, and in that at least one damping system (20) is interconnected between said fixed assembly and said suspended assembly of the carriage.
2. Lift according to claim 1, characterized in that said damping system comprises at least one cylinder and piston damper assembly, in which the cylinder (21) is associated with one (5b) of said fixed and suspended assembly, and the piston (22) is associated with the other (5a) of said fixed and suspended assembly.
3. Lift according to claim 1 or 2, wherein the fixed assembly comprises a plate (6) fixed to a wall of the cabin, and said plate supports a group of said pulleys; the movable assembly comprises a second plate (7) which supports a second group of said pulleys, the two plates being elastically connected by at least one spring (8), and also being connected by said damping system (20).
4. Lift according to claim 1, 2 or 3, wherein the carriage comprises two damping systems on opposite sides of said carriage.
5. Lift according to any one of the preceding claims, the suspension means being a belt.
CH7782010A 2010-05-17 2010-05-17 Refinement of suspension and safety shutdown system for the cab of an elevator without counterweight. CH703168A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH7782010A CH703168A2 (en) 2010-05-17 2010-05-17 Refinement of suspension and safety shutdown system for the cab of an elevator without counterweight.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH7782010A CH703168A2 (en) 2010-05-17 2010-05-17 Refinement of suspension and safety shutdown system for the cab of an elevator without counterweight.
PCT/IB2011/052140 WO2011145042A1 (en) 2010-05-17 2011-05-16 Improvement of a suspension and safety stop system for a cabin of an elevator without counterweight
EP20110731091 EP2571801B1 (en) 2010-05-17 2011-05-16 Improvement of a suspension and safety stop system for a cabin of an elevator without counterweight

Publications (1)

Publication Number Publication Date
CH703168A2 true CH703168A2 (en) 2011-11-30

Family

ID=44628287

Family Applications (1)

Application Number Title Priority Date Filing Date
CH7782010A CH703168A2 (en) 2010-05-17 2010-05-17 Refinement of suspension and safety shutdown system for the cab of an elevator without counterweight.

Country Status (3)

Country Link
EP (1) EP2571801B1 (en)
CH (1) CH703168A2 (en)
WO (1) WO2011145042A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19632850C2 (en) * 1996-08-14 1998-09-10 Regina Koester Traction sheave elevator without counterweight
FI120091B (en) * 2006-11-10 2009-06-30 Kone Corp Counterweight traction lift
FI123730B (en) * 2006-11-10 2013-10-15 Kone Corp Arrangement in the elevator speed limiter
SE0700098L (en) * 2007-01-17 2008-07-18 Motala Hissar Ab Elevator drive device
CN102164840A (en) * 2008-09-30 2011-08-24 通力股份公司 Elevator

Also Published As

Publication number Publication date
EP2571801B1 (en) 2014-05-14
EP2571801A1 (en) 2013-03-27
WO2011145042A1 (en) 2011-11-24

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