EP1908720A1 - Sperre für eine Aufzugsschachtgrube - Google Patents

Sperre für eine Aufzugsschachtgrube Download PDF

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Publication number
EP1908720A1
EP1908720A1 EP07117612A EP07117612A EP1908720A1 EP 1908720 A1 EP1908720 A1 EP 1908720A1 EP 07117612 A EP07117612 A EP 07117612A EP 07117612 A EP07117612 A EP 07117612A EP 1908720 A1 EP1908720 A1 EP 1908720A1
Authority
EP
European Patent Office
Prior art keywords
barrier
pit
car
elevator installation
installation according
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.)
Granted
Application number
EP07117612A
Other languages
English (en)
French (fr)
Other versions
EP1908720B1 (de
Inventor
Hanspeter Bloch
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.)
Inventio AG
Original Assignee
Inventio AG
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 Inventio AG filed Critical Inventio AG
Priority to EP20070117612 priority Critical patent/EP1908720B1/de
Publication of EP1908720A1 publication Critical patent/EP1908720A1/de
Application granted granted Critical
Publication of EP1908720B1 publication Critical patent/EP1908720B1/de
Active 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
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/28—Buffer-stops for cars, cages, or skips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0043—Devices enhancing safety during maintenance
    • B66B5/005—Safety of maintenance personnel

Definitions

  • the present invention relates to elevators and, in particular, to a barrier located in the elevator pit to maintain the safety of personnel working in a pit of reduced depth.
  • the ropes 4 are driven by a traction sheave (not shown) to move the car 1 along guide rails (not shown) mounted to opposing shaft walls 6.
  • a buffer 16 is mounted in the pit 12 of the shaft 10 to arrest the car 1 should it travel beyond its normal travel limit (i.e. the lowest landing).
  • a minimum free vertical clearance C exists between the pit floor 14 and the lowest part of the car 1, which in this instance is the pulley box 2.
  • the toeguard 8 actually extends below the pulley box 2, as mentioned above, it can be explicitly excluded from consideration by the regulations.
  • the objective of the present invention is to reduce the pit depth and thereby the minimum free vertical clearance between the pit floor and the lowest parts of the car while maintaining the safety of any personnel working in the pit.
  • an elevator installation comprising a car within a shaft, a buffer mounted in a pit of the shaft and a barrier located in the pit surrounding or within an area wherein a vertical clearance between the pit floor and the car or equipment mounted thereon is less than a regulatory threshold value when the car fully compresses the buffer. Accordingly, the barrier acts to physically deterrent personnel within the pit from inadvertent presence in the area of reduced vertical clearance.
  • the barrier is height-adjustable and biased to its highest position. Accordingly, the barrier can have a height greater than the reduced vertical clearance but will not be damaged if the car travels into it. Furthermore, even if a maintenance person were to get a hand for example trapped between the car and the barrier, the height-adjustability of barrier ensures that such entrapment will not cause personal injury.
  • the barrier may be flexible and preferably elastically deformable. Such a barrier may take the form of an inflated balloon.
  • the flexible and deformable barrier may comprise two flexible uprights interconnected by linkage means such as a net. Should the car descend into the barrier, the flexible uprights will automatically deform to a reduced height. Since this barrier contains no complicated moving parts it provides a relatively low cost solution.
  • the flexible uprights are doubled-over so that if the car descends into the barrier each upright deforms outwards in mutually opposing directions. Accordingly, the greater the deformation of the uprights, the greater the area effectively protected by the barrier.
  • the barrier may comprise a pair of channels each retaining at least one slider, and linkage means secured to and interconnecting the sliders of the opposing channels. Accordingly, if the car descends into the barrier, the linkage means and sliders moved downwards in the channels against the biasing force.
  • the linkage means may have the form of rigid bars, wires, belts or a net.
  • Figs. 4 and 5 illustrate an elevator installation according to a first embodiment of the present invention. While the arrangements of the car 1 within the shaft 10 are identical to those previously described with respect to the prior art of Figs. 1 and 2 respectively, areas on the pit floor 14 directly beneath the underslung pulley box 2 or other components mounted under the car are clearly marked with a tape 18 of diagonal stripes of contrasting colours (e.g. yellow and black or red and white). Preferably, words such as "DANGER LOW CLEARANCE" can be printed in the tape 18. Furthermore, a barrier 20 is also erected in the pit 12 directly beneath the underslung pulley box 2. The barrier 20 comprises a pair of opposing flexible uprights 22 mounted to the pit floor 14 with an interconnecting net 24.
  • the tape 18 and the barrier 20 both act as visible warnings that the area under the pulley box 2 could potentially have a reduced vertical clearance.
  • the barrier 20 acts to physically deterrent personnel within the pit 12 from inadvertently working in the area of reduced vertical clearance.
  • the barrier 20 will be deflected due to the flexible nature of the uprights 22. Hence, even if a maintenance person were to get a hand for example trapped between the pulley box 2 and the barrier 20, the barrier is sufficiently flexible to accommodate the body part without causing damage.
  • the maintenance personnel Given the central location of the barrier 20 and the fact that it essentially spans the entire width of the pit 12, the maintenance personnel will inherently need to cross the barrier 20 occasionally; the barrier 20 is easily deformable to enable them to do so. However, these transitions across the barrier 20 make up only a small amount of the total time the maintenance personnel spend in the pit 12.
  • the large majority of maintenance operations carried out in the pit 12 will actually require the person to face away from the barrier 20 which in turn generally means that their arms will also be projecting away from the barrier 20. In which case the person will only come into contact with the barrier if he backs into it and the normal reaction to that is to step slightly away and out of the reduced clearance area. Even the majority of work on the pulley box 2 is carried out from the side rather than underneath. Hence, a relatively low barrier, perhaps at knee height ( ⁇ 500mm), would be sufficient to effectively deter personnel from inadvertent presence in the area under the pulley box 2.
  • Figs. 6 to 8 illustrate an alternative barrier 30 which is similar to the barrier 20 of the first embodiment but, in this instance, each of the uprights 32 is doubled-over with both ends secured to the pit floor 14.
  • the doubled-over uprights 32 and the interconnected net 24 are deflected outwards. Accordingly, any person standing adjacent to the barrier 30 is also thrust away from the reduced clearance area under the pulley box 2. The car may continue to descend, and thereby further deform the barrier 30, until it rests on the fully compressed buffer 16, as shown in Fig. 8.
  • the regulatory minimum free vertical clearance C may now be determined as existing between the pit floor 14 and the car 1, rather then between the pit floor 14 and the underslung pulley box 2 (as in the prior art of Fig. 3), enabling a space saving within the elevator installation corresponding to the height S of the pulley box 2.
  • the barrier 40 comprises a pair of opposing uprights in the form of U-shaped channels 42.
  • the channels 42 may be secured at their bases to the pit floor 14 as in the previously described embodiments, or, alternatively, they can be mounted on opposing side walls 6 of the shaft 10.
  • Each channel 42 retains a plurality of sliders 46 connected to a net 44.
  • the uppermost slider 46 in each channel 42 is biased upwards by a spring 48.
  • Fig. 11 shows an alternative embodiment of the invention, wherein the upward bias of the net 44 is provided by a counterweight 50.
  • the uppermost slider 46 within each channel 42 is attached by a wire or rope 54 which passes over a pulley 52 to the counterweight 50.
  • the area under the pulley box 2 is a relatively low maintenance intensive area. If, on the other hand, the reduced clearance area is within a high maintenance intensive sector of the pit 12, then a relatively high barrier, perhaps at shoulder height ( ⁇ 1500mm), should be employed in or surrounding the reduced clearance area to positively prevent personnel from inadvertent presence in that area.

Landscapes

  • Types And Forms Of Lifts (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP20070117612 2006-10-06 2007-10-01 Sperre für eine Aufzugsschachtgrube Active EP1908720B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070117612 EP1908720B1 (de) 2006-10-06 2007-10-01 Sperre für eine Aufzugsschachtgrube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06121879 2006-10-06
EP20070117612 EP1908720B1 (de) 2006-10-06 2007-10-01 Sperre für eine Aufzugsschachtgrube

Publications (2)

Publication Number Publication Date
EP1908720A1 true EP1908720A1 (de) 2008-04-09
EP1908720B1 EP1908720B1 (de) 2012-04-25

Family

ID=39148391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070117612 Active EP1908720B1 (de) 2006-10-06 2007-10-01 Sperre für eine Aufzugsschachtgrube

Country Status (1)

Country Link
EP (1) EP1908720B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052459A1 (de) * 2000-10-23 2002-05-02 Mueller Wolfgang T Schutzraumvorrichtungen für maschinenraumlose Aufzüge mit reduziertem Schacht
EP1479636A1 (de) 2003-05-21 2004-11-24 Inventio Ag Puffer zum Schaffen einer Schutzzone in einer Aufzugsanlage
WO2005058739A2 (en) * 2003-12-10 2005-06-30 Otis Elevator Company Elevator pit safety apparatus
US20060042883A1 (en) * 2004-09-02 2006-03-02 Gary Scott Elevator pit safety device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052459A1 (de) * 2000-10-23 2002-05-02 Mueller Wolfgang T Schutzraumvorrichtungen für maschinenraumlose Aufzüge mit reduziertem Schacht
EP1479636A1 (de) 2003-05-21 2004-11-24 Inventio Ag Puffer zum Schaffen einer Schutzzone in einer Aufzugsanlage
WO2005058739A2 (en) * 2003-12-10 2005-06-30 Otis Elevator Company Elevator pit safety apparatus
US20060042883A1 (en) * 2004-09-02 2006-03-02 Gary Scott Elevator pit safety device

Also Published As

Publication number Publication date
EP1908720B1 (de) 2012-04-25

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