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WO2003018459A1 - Appareil de securite destine a la maintenance de systemes d'ascenseur depuis la surface superieure de la cabine - Google Patents

Appareil de securite destine a la maintenance de systemes d'ascenseur depuis la surface superieure de la cabine Download PDF

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Publication number
WO2003018459A1
WO2003018459A1 PCT/US2002/026656 US0226656W WO03018459A1 WO 2003018459 A1 WO2003018459 A1 WO 2003018459A1 US 0226656 W US0226656 W US 0226656W WO 03018459 A1 WO03018459 A1 WO 03018459A1
Authority
WO
WIPO (PCT)
Prior art keywords
brace
car
column
sleeve
upright position
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.)
Ceased
Application number
PCT/US2002/026656
Other languages
English (en)
Inventor
Thomas F. Malone, Jr.
Robert Isaman
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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
Priority claimed from US09/940,118 external-priority patent/US6481537B1/en
Priority claimed from US09/940,119 external-priority patent/US6481534B1/en
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Priority to DE10297157T priority Critical patent/DE10297157T5/de
Priority to JP2003523132A priority patent/JP4276941B2/ja
Publication of WO2003018459A1 publication Critical patent/WO2003018459A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B66B5/0043—Devices enhancing safety during maintenance
    • B66B5/005—Safety of maintenance personnel
    • B66B5/0056—Safety of maintenance personnel by preventing crushing
    • B66B5/0062—Safety of maintenance personnel by preventing crushing by devices, being operable or not, mounted on the elevator car

Definitions

  • This invention relates generally to a traction elevator system, and specifically to an apparatus for protecting maintenance personnel working on the roof of an elevator car.
  • Each harness is equipped with a lanyard that allows the worker to move freely about the rooftop area.
  • These lanyards are relatively long and are typically tethered to the crosshead of the lifting frame that extends across the roof of the car at a slightly higher elevation than the rooftop.
  • a good deal of slack is afforded the lanyard which can get in the way of the worker, and will permit the worker to fall some distance before the lanyard catches the worker's fall. Accordingly, there is a need to reduce the slack of the lanyard without restricting the worker's ability to move about the car rooftop area.
  • a beam, column or other brace is mounted to the elevator car and preferably is positionable to extend vertically a given distance above the car.
  • a feature of an embodiment of the present invention is to maintain adequate overhead space for a worker while he or she is situated upon the rooftop of an elevator car.
  • a preferred feature of this embodiment of the invention is to disable the up function of the elevator's inspection box control circuitry until such time as preventative measures have been carried out to prevent a worker on top of the elevator car from becoming entrapped between the car and the structure located in the top of the hoistway.
  • a body harness worn by the worker can be secured to an elevated section of the beam or column by means of a lanyard.
  • the lanyard provides sufficient slack to permit the worker to move freely about the rooftop, yet is short enough to limit the distance the worker will travel in the event the worker falls off the rooftop into the hoistway.
  • Fig. 1 is a perspective view showing a traction elevator system embodying the teachings of the present invention
  • Fig. 2 is a partial enlarged front view illustrating an embodiment of the safety apparatus of the present invention
  • Fig. 3 is a view similar to Fig. 2 illustrating a further embodiment of the invention.
  • a traction type elevator system generally referenced 10 that embodies the teachings of a preferred embodiment of the present invention.
  • the system 10 includes an elevator car 12 of well known construction that is supported inside a lifting frame 13.
  • Side members 14 of the frame contain guide mechanisms equipped with rollers 15 that are arranged to ride along opposed guide rails (not shown) that extend vertically along the length of the hoistway.
  • the lifting frame includes a crosshead 17 that passes horizontally across the top of the car between the side members of the frame.
  • Lifting ropes 18 are attached to the crosshead and the ropes trained over a drive sheave 20 and a deflection sheave 21 both of which are mounted in the hoistway close to the hoistway ceiling 23.
  • the opposite ends of the lifting ropes are secured to a counterweight assembly 25 which, like the car lifting frame, is arranged to ride along vertically disposed guide rails (not shown) located within the hoistway.
  • the term lifting rope, as herein used, refers to any suitable flexible cable or belt, as known and used in the art, that is suitable for lifting an elevator within the hoistway. The motion of the car is obtained through friction between the lifting ropes and the traction drive sheave 20.
  • the lifting ropes are passed over the drive sheave and one end of each rope is secured to the counterweight assembly. Accordingly, the ropes are tensioned on both sides of the drive sheave to develop the necessary drive friction to lift the elevator cab. As can be seen, the counterweight assembly assures that sufficient tension is developed on one side of the sheave. The weight of the car provides the needed opposing tension. An inherent safety feature is that traction is lost in the event the tension differential on the rope exceeds a given limit.
  • An inspection box 30 is mounted upon the crosshead 17 of the lifting frame.
  • the box is connected to the car controller and permits a mechanic 32 situated upon the roof of the car to control the operation of the car from the roof.
  • the inspection box allows the mechanic to move the elevator at very slow speed while he or she inspects the operation of various elevator system components. Accordingly, there presently exists the possibility, in the event of an inspection box failure or safety device override, of the car over-traveling past the uppermost landing and approaching or contacting structure in the top of the hoistway while a worker is situated upon the car roof. It should be further noted that more and more equipment is being located in the upper part of the hoistway in order to save space, further reducing the space available over the car.
  • the present embodiment is provided with a square shaped hollow sleeve 40 that is welded or otherwise connected to the crosshead 17 in a vertical or upright position.
  • the sleeve includes a pair of opposed side walls 41 and a pair of opposed end walls 42.
  • the side walls extend to a higher elevation than the two end walls to establish a cutout in the upper part of the sleeve.
  • a horizontally disposed pivot pin 44 extends across the cutout region and is secured in the upper section of each side wall.
  • An elongated square shaped hollow column 47 is rotatably mounted upon the pivot pin.
  • the pin is arranged to pass through opposed elongated slotted holes 50 formed in the side walls 48 of the column so that the column can rotate between a lowered position as shown in phantom outline in Fig. 2, into an upright position in axial alignment with the sleeve.
  • the column when placed in a vertical upright position can be slidably received within the sleeve.
  • the column and the sleeve are sized to provide a close sliding fit between walls of the column within the sleeve.
  • the axial length of the slotted holes 50 is sufficiently long to permit the column to bottom within the sleeve.
  • the axial length of the column when erected is sufficient that it extends upwardly to a height that is at least slightly higher than the shoulder height of an average worker when standing upon the roof of the car (about five feet (about 1.5 meters) or more), and preferably slightly higher the height of most workers that will stand upon the roof of the car.
  • the column is moved out of the way into the lowered position.
  • the column and the sleeve are sized so that the erected column can withstand a compressive load without buckling that is substantially greater than the slip load of the hoist system, that is, the load at which the rope slips upon the drive sheave.
  • the column 47 and sleeve 40 are preferably formed of low-carbon structural steel. Other ferrous alloys, such as other types of steel, and other materials, such as light alloys, polymers and composites, having sufficient compressive strength characteristics, may be used. Further, although the column 47 and sleeve 40 have been shown as square in cross-section, any suitable shapes may used, so long as the sleeve 40 can maintain the column 47 upright, and the column 47 can withstand a sufficient compressive load without buckling. For example, the column 47 can be a structural tube or an I-beam without substantially modifying the shape of the sleeve 40.
  • a sensing switch 57 may be mounted to the base of the sleeve where it is cycled by the column as it is bottomed in the sleeve.
  • the switch can be wired into the inspection box circuitry and arranged to prevent inspection operation in an upward direction (or in either direction, if desired) until such time as the column is fully seated within the sleeve.
  • the switch can also be used to disable normal elevator operations when the column is upright, especially if the column could otherwise be lifted into overhead structures during normal operation of the car.
  • the column is an I-beam 60 that is connected to a generous base plate 61 that is secured to the crosshead 17 by welds, bolts, screws, or other suitable fastener.
  • the I-beam is preferably connected to the base plate by a hinge 62 that enables the beam to be rotated between a vertical position as illustrated and a stored horizontal position.
  • a latch mechanism 65 can be used to secure the beam in an upright position.
  • the latch mechanism can include a hasp 66 that is arranged to pass over a U-shaped staple 67 that is secured in the base plate when the beam is brought to an upright position.
  • a pin 68 is passed through the staple 67 to lock the beam in an upright position.
  • the column is an I-beam 60 formed of steel.
  • other suitable shapes and materials can be employed.
  • a switch 70 can be mounted upon the crosshead 17 that senses when the beam is in a stored position.
  • the switch can be wired into the inspection box control circuitry and serves to disable the up (or up and down) function control any time the beam is in a stored position, and/or disables normal operation when the beam is not stored.
  • FIG. 2 the column is illustrated in a vertical or upright position seated within the sleeve.
  • a harness 70 of the type worn by a worker operating in high places may be attached to an elevated section of the column by a lanyard 73.
  • An eye bolt 74 is provided at the desired elevation, held securely to the column by a nut 75.
  • the distal end of the lanyard can be coupled to the eye bolt 74.
  • any suitable connecting device as known and used in the art such as, for example an eyelet near an edge of the column, or a U-bolt, shackle or clevis
  • multiple attachment points may be provided to accommodate different height workers. It should be further evident to one skilled in the art that a full body harness may also be employed without departing from the teachings of the invention.
  • a column having a length of about five to about six feet (about 1.5 to about 1.8 meters) is preferably utilized in the practice of the present invention.
  • the distal end of the lanyard is located at an elevation that is slightly above the average worker's shoulder.
  • the length of the lanyard is such that the lanyard is held aloft allowing the worker to move freely about the rooftop of the car while providing little slack in the event the worker falls off the roof into the hoistway.
  • the column may serve either as a brace to prevent upward overrun of the car into the hoistway ceiling or to provide an elevated attachment point for a safety harness, or both. If the column only acts as to provide the elevated attachment point, then the column and sleeve assembly need not necessarily be strong enough to halt the upward motion of the car, but should be able to withstand the expected load of a falling worker, and preferably should be sized to comply with regulatory requirements regarding structural strength of fall protection anchorages (for example, current OSHA regulations require sustaining a 5000 lb. (1866.2 kg) static load).
  • design variations on the column can include cross-sectional shape (structural tubing, open-section beams, etc.). Further, alternate crosshead mounting methods may be used. Alternately, the column may be mounted elsewhere on the lifting frame. Also, a contact plate (not shown) may be provided at the top of the hoistway at a location that the column would impact, or a resilient mount or device may be used to absorb the initial shock load of the column contacting the hoistway overhead structure.
  • the stroke of an energy accumulating device if used in the U.S., would only need to be about 65 mm.
  • other upright brace structures such as an A-frame or the like, may be employed instead of a vertical column.
  • the subject invention has been discussed in the context of traction elevator systems, for which car-top maintenance and/or inspection are common. However, it should be noted that the subject invention can be employed in other systems such as, for example, a hydraulic elevator system having a pressure relief valve on the main lifting piston. In such a system, a brace mechanism would withstand sufficient compressive loading to trigger the pressure relief valve and halt upward movement of the car. Although most useful in a low-overhead elevator system, if sufficient overhead space is available in the elevator system, then the column need not be moveable into a lowered position.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

L'invention concerne un appareil destiné à protéger un ouvrier se trouvant sur le toit d'une cabine d'ascenseur à traction. Une colonne verticale est sécurisée à la zone de toit de la cabine. Dans l'un des modes de réalisation, la colonne permet de supporter une charge de compression supérieure à la charge de désengagement du mécanisme d'entraînement de la cabine. Dans un autre mode de réalisation, un harnais est fixé à proximité du sommet de la colonne au moyen d'une longe.
PCT/US2002/026656 2001-08-27 2002-08-20 Appareil de securite destine a la maintenance de systemes d'ascenseur depuis la surface superieure de la cabine Ceased WO2003018459A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10297157T DE10297157T5 (de) 2001-08-27 2002-08-20 Sicherheitsvorrichtung für Wartung von Aufzugsystemen vom Dach der Kabine aus
JP2003523132A JP4276941B2 (ja) 2001-08-27 2002-08-20 エレベータかご上でのエレベータシステムの保守に用いる安全装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/940,118 2001-08-27
US09/940,118 US6481537B1 (en) 2001-08-27 2001-08-27 Rooftop safety apparatus for elevator servicing
US09/940,119 US6481534B1 (en) 2001-08-27 2001-08-27 Apparatus for maintaining adequate overhead space for car top mechanics in elevator systems
US09/940,119 2001-08-27

Publications (1)

Publication Number Publication Date
WO2003018459A1 true WO2003018459A1 (fr) 2003-03-06

Family

ID=27130129

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/026656 Ceased WO2003018459A1 (fr) 2001-08-27 2002-08-20 Appareil de securite destine a la maintenance de systemes d'ascenseur depuis la surface superieure de la cabine

Country Status (4)

Country Link
JP (1) JP4276941B2 (fr)
CN (1) CN1315712C (fr)
DE (1) DE10297157T5 (fr)
WO (1) WO2003018459A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2349514A1 (es) * 2008-07-30 2011-01-04 Orona, S. Coop. Aparato elevador.
EP1925581A4 (fr) * 2005-09-16 2012-12-19 Mitsubishi Electric Corp Dispositif de rambarde monte au-dessus d une cabine d ascenseur
WO2021099875A1 (fr) * 2019-11-21 2021-05-27 3M Innovative Properties Company Système de protection contre les chutes
WO2021099876A1 (fr) * 2019-11-21 2021-05-27 3M Innovative Properties Company Système de protection contre les chutes
US12102851B2 (en) 2019-11-21 2024-10-01 3M Innovative Properties Company Fall protection system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004053854B4 (de) * 2003-11-05 2014-03-27 Bornack Gmbh & Co. Kg Sicherungsanordnung
CN101068742B (zh) * 2004-11-30 2010-12-22 奥蒂斯电梯公司 设有可折叠起来的冲击吸收柱的电梯轿厢及相应的电梯
JP5081751B2 (ja) * 2008-07-15 2012-11-28 株式会社日立製作所 エレベーターの保守時安全装置
CN104024139B (zh) * 2011-12-21 2016-08-31 奥的斯电梯公司 包括用于维持顶部间隙的轿厢停止器的电梯系统
CN104326331A (zh) * 2014-10-29 2015-02-04 康力电梯股份有限公司 一种电梯上梁安全检修装置
CN108217392A (zh) * 2018-01-26 2018-06-29 苏州沃诺斯精密机械有限公司 一种安装有防冲顶柱的轿厢

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0958942A (ja) * 1995-08-22 1997-03-04 Mitsubishi Denki Bill Techno Service Kk エレベーターの間隔保持装置
WO1999047447A1 (fr) * 1998-03-18 1999-09-23 Kone Corporation Dispositif de securite pour ascenseur
EP0985628A2 (fr) * 1998-09-03 2000-03-15 Kabushiki Kaisha Toshiba Ascenseur comprenant des garde-corps à bords supérieurs amovibles
US6138798A (en) * 1995-12-22 2000-10-31 Macuga; Henry J. Elevator safety system incorporating false pit
FR2795060A1 (fr) * 1999-06-17 2000-12-22 Gilles Antras Dispositif de securite pour technicien ascensoriste permettant d'eviter l'ecrasement de celui-ci entre la cabine et le plafond de la cage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0958942A (ja) * 1995-08-22 1997-03-04 Mitsubishi Denki Bill Techno Service Kk エレベーターの間隔保持装置
US6138798A (en) * 1995-12-22 2000-10-31 Macuga; Henry J. Elevator safety system incorporating false pit
WO1999047447A1 (fr) * 1998-03-18 1999-09-23 Kone Corporation Dispositif de securite pour ascenseur
EP0985628A2 (fr) * 1998-09-03 2000-03-15 Kabushiki Kaisha Toshiba Ascenseur comprenant des garde-corps à bords supérieurs amovibles
FR2795060A1 (fr) * 1999-06-17 2000-12-22 Gilles Antras Dispositif de securite pour technicien ascensoriste permettant d'eviter l'ecrasement de celui-ci entre la cabine et le plafond de la cage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1925581A4 (fr) * 2005-09-16 2012-12-19 Mitsubishi Electric Corp Dispositif de rambarde monte au-dessus d une cabine d ascenseur
ES2349514A1 (es) * 2008-07-30 2011-01-04 Orona, S. Coop. Aparato elevador.
WO2021099875A1 (fr) * 2019-11-21 2021-05-27 3M Innovative Properties Company Système de protection contre les chutes
WO2021099876A1 (fr) * 2019-11-21 2021-05-27 3M Innovative Properties Company Système de protection contre les chutes
US12102851B2 (en) 2019-11-21 2024-10-01 3M Innovative Properties Company Fall protection system
US12350530B2 (en) 2019-11-21 2025-07-08 3M Innovative Properties Company Fall protection system

Also Published As

Publication number Publication date
CN1315712C (zh) 2007-05-16
JP4276941B2 (ja) 2009-06-10
CN1547549A (zh) 2004-11-17
JP2005500962A (ja) 2005-01-13
DE10297157T5 (de) 2004-07-22

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