EP0655410A2 - Dispositif automatique de test de sécurité pour ascenseurs hydrauliques - Google Patents

Dispositif automatique de test de sécurité pour ascenseurs hydrauliques Download PDF

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Publication number
EP0655410A2
EP0655410A2 EP94308801A EP94308801A EP0655410A2 EP 0655410 A2 EP0655410 A2 EP 0655410A2 EP 94308801 A EP94308801 A EP 94308801A EP 94308801 A EP94308801 A EP 94308801A EP 0655410 A2 EP0655410 A2 EP 0655410A2
Authority
EP
European Patent Office
Prior art keywords
test assembly
rope
lever
fastening device
abutment
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
EP94308801A
Other languages
German (de)
English (en)
Other versions
EP0655410B1 (fr
EP0655410A3 (fr
Inventor
Erminio Guaita
Leandre Adifon
Carlo Vailati
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
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Publication of EP0655410A2 publication Critical patent/EP0655410A2/fr
Publication of EP0655410A3 publication Critical patent/EP0655410A3/fr
Application granted granted Critical
Publication of EP0655410B1 publication Critical patent/EP0655410B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
    • B66B5/0093—Testing of safety devices
    • 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

Definitions

  • the present invention concerns an assembly to facilitate testing of safety mechanisms in hydraulic elevators.
  • hydraulic elevators can be actuated directly or indirectly.
  • a piston or.pistons are connected to the framework of the car by means of a series of ropes, which are, in turn, sent back over pulleys.
  • a speed governor is used to prevent the rate of descent from exceeding a predetermined value.
  • a slack rope system is provided instead of a governor.
  • a mechanism used along with a rupture valve over the piston, substitutes for the governor.
  • small wheels provided along the running guides of the elevator car are automatically pressed against the running guides, thus stopping the travel of the elevator car.
  • the cars of hydraulic elevators are mounted on a framework consisting of two uprights and a base. On each upright are the slide runners or rollers of the elevator car and a safety plate.
  • the safety plate includes a roller that moves vertically and which, if activated, presses against the guide, stopping the elevator car.
  • Each of the rollers is engaged by a torsion bar that actuates the rollers.
  • a slack rope device is installed on the elevator, the building operators may adopt several solutions to allow the test to be conducted by the inspectors.
  • One solution includes the steps of directly connecting a rope to the torsion bar and pulling it from the pit to engage the rollers with the guide and thereby block the full path of travel of the elevator car. As can be understood, this system is not particularly efficacious in that it does not actually de-tension the rope.
  • straps are mounted onto the guides and directly onto the framework of the elevator car.
  • the straps on the car are used to keep the torsion bar of the safety system in the rest position by means of the pressure of the springs of the hoist ropes.
  • the straps fixed onto the guides engage those arranged on the framework of the elevator car, releasing the springs that actuate the torsion bar of the safety system, thereby stopping the elevator car.
  • This type of device requires the operator to go into the hoistway of the elevator car after the test to remove the strap from the framework of the elevator car. This activity is not always acceptable according to the standards in effect.
  • a test assembly for facilitating safety tests in an elevator having a slack rope device
  • the test assembly including: a fastening device for a rope; means for attaching a rope to said fastening device; abutment means carried on the attachment means; means for engaging the abutment means to prevent relative movement between the abutment means and the fastening device; and means for remotely disengaging the engagement means from the abutment means, wherein such disengagement permits movement of the attachment means relative to the fastening device sufficient to activate the slack rope device.
  • a test assembly for facilitating safety tests in an elevator having a slack rope device, comprising stop means coupled to a rope of the elevator, means engaging said stop means to prevent movement of said rope, and means for remotely disengaging said engaging means from said stop means to allow said rope to move by an amount sufficient to activate the slack rope device.
  • a test assembly operates to permit movement of a rope by an amount sufficient to activate the elevator's slack rope system.
  • the test assembly preferably includes an attachment strap of one of the ropes which, upon activation of the test assembly, is permitted to slide in relation to a fastening device of the rope. The movement of the rope is an amount at least sufficient to activate the slack rope device.
  • the test assembly further preferably includes a flange carried on the attachment strap above said fastening device, means to engage the flange to lock the attachment strap into a deactivated position, and means to control remotely the engagement means to disengage the flange and thereby permit motion of the rope.
  • the means to engage includes a system of levers and wherein means to prevent unauthorized activation of the test assembly is provided on the system of levers.
  • the means includes a safety pin positioned to prevent pivoting of one of the system of levers.
  • a return spring is provided over the attachment strap, below the fastening device of the ropes. After activation of the test assembly, the return spring is compressed between the fastening device and the end of the attachment strap. The compressed spring urges the rope to return into its initial position such that the system of levers may be repositioned to engage the flange and block any further movement of the rope.
  • the system of levers includes a block on which a first and a second lever are hinged. In the deactivated position of the test assembly, one end of the first lever is engaged with the flange, and the other end is positioned above one end of the second lever.
  • the means of remote activation is connected to the other end of the second lever. Both levers are positioned with respect to each other in such a way that when the means of remote activation is acted upon, the second lever rotates, thus releasing the end of the first lever with which it is engaged. This permits the first lever to rotate and thereby release the flange, which, in turn, allows the attachment strap to slide in relation to the fastening device, by action of the spring of the slack rope device, consequently untensioning the rope.
  • a fastening device 1 is located in the pit of the hoistway. Straps 2 of two ropes 3 are attached to the fastening device. The opposite end of each rope 3 (see Figure 2) is connected to block 4, with a spring positioned around it and compressed between block 4 and plate 6. Blocks 4 are proximate to lever 7. Engagement between blocks 4 and lever 7 causes the activation of the safety device.
  • the safety device is illustrated generically with reference number 8, as it does not form part of the invention.
  • fixed block 9 is mounted on the fastening device 1.
  • a first lever 10, hinged at point 11, and a second lever 12, hinged at point 13, are hinged on the fixed block 9.
  • the first lever 10 is shown in a substantially horizontal position, in the deactivated condition shown in Figure 1, with one of its ends--the front one--engaged with flange 14 positioned over the threaded part 15 of strap 2, above fastening device 1, and with the other end engaged with the upper end of lever 12.
  • the lower end of lever 12, which is found in a substantially vertical position in the deactivated condition of Figure 1, is connected to line 16.
  • Line 16 provides means to activate the test assembly.
  • threaded part 15 extends below fastening device 1 by a much larger amount than the corresponding threaded part 15 of the other strap 2, over which the test assembly is not provided.
  • the threaded part 15 carries spring 17, which is positioned between fastening device 1 and nut and lock nut system 18, screwed to the end of threaded part 15.
  • the extent of threaded part 15 below fastening device 1 is determined so as to allow, as will be more evident later, rope 3 to move at least enough to activate safety device 8.
  • a safety pin 19 is provided on block 9. The safety pin provides means to prevent activation of the test assembly by an unauthorized person or accidental activation.
  • test assembly is realized further in such a way as to be restored automatically.
  • a typical hydraulic elevator has an automatic valve that, when activated, makes the pulleys drop even a little lower.
  • spring 17 can lengthen, bringing flange 14 back to a position in which it can be reengaged by the end of lever 10. In any case, it should be noted that the restoration would occur even in the absence of spring 17, simply by the force of gravity.
  • At least the invention provides a simple, easy to use test assembly for safety testing hydraulic elevators, which does not require long preparation times and that can be used quickly, and which allows the entire test to be conducted without the need to go into the hoistway.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Types And Forms Of Lifts (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
EP94308801A 1993-11-29 1994-11-29 Dispositif automatique de test de sécurité pour ascenseurs hydrauliques Expired - Lifetime EP0655410B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM930793A IT1262462B (it) 1993-11-29 1993-11-29 Dispositivo automatico per prove di sicurezza in ascensori idraulici ad azionamento indiretto.
ITRM930793 1993-11-29

Publications (3)

Publication Number Publication Date
EP0655410A2 true EP0655410A2 (fr) 1995-05-31
EP0655410A3 EP0655410A3 (fr) 1995-11-29
EP0655410B1 EP0655410B1 (fr) 1999-09-08

Family

ID=11402075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94308801A Expired - Lifetime EP0655410B1 (fr) 1993-11-29 1994-11-29 Dispositif automatique de test de sécurité pour ascenseurs hydrauliques

Country Status (6)

Country Link
EP (1) EP0655410B1 (fr)
JP (1) JPH07196270A (fr)
KR (1) KR100329129B1 (fr)
AT (1) ATE184259T1 (fr)
DE (1) DE69420519T2 (fr)
IT (1) IT1262462B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872444A2 (fr) * 1997-04-14 1998-10-21 Kone Corporation Procédure et appareil pour tester un parachute d'ascenseur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027989A1 (de) * 2006-06-14 2007-12-20 Logos-Innovationen Gmbh Hebevorrichtung mit einer Antriebseinheit zum Heben einer Lastaufnahme
CN104310152B (zh) * 2014-09-19 2016-04-27 宁波浩渤工贸有限公司 一种电梯绳索安全紧固装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232213A1 (de) * 1982-08-30 1984-03-01 Oildinamic Aufzugsantriebe GmbH, 8011 Kirchheim Vorrichtung zur ploetzlichen entlastung des seilzugs von seilhydraulik-aufzuegen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232213A1 (de) * 1982-08-30 1984-03-01 Oildinamic Aufzugsantriebe GmbH, 8011 Kirchheim Vorrichtung zur ploetzlichen entlastung des seilzugs von seilhydraulik-aufzuegen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872444A2 (fr) * 1997-04-14 1998-10-21 Kone Corporation Procédure et appareil pour tester un parachute d'ascenseur
EP0872444A3 (fr) * 1997-04-14 1999-03-31 Kone Corporation Procédure et appareil pour tester un parachute d'ascenseur

Also Published As

Publication number Publication date
DE69420519T2 (de) 2000-04-13
ATE184259T1 (de) 1999-09-15
DE69420519D1 (de) 1999-10-14
ITRM930793A0 (it) 1993-11-29
EP0655410B1 (fr) 1999-09-08
JPH07196270A (ja) 1995-08-01
KR100329129B1 (ko) 2002-11-22
KR950013958A (ko) 1995-06-15
EP0655410A3 (fr) 1995-11-29
IT1262462B (it) 1996-06-19
ITRM930793A1 (it) 1995-05-29

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