IL131057A - Device to arrest motion of an elevator installation - Google Patents

Device to arrest motion of an elevator installation

Info

Publication number
IL131057A
IL131057A IL13105799A IL13105799A IL131057A IL 131057 A IL131057 A IL 131057A IL 13105799 A IL13105799 A IL 13105799A IL 13105799 A IL13105799 A IL 13105799A IL 131057 A IL131057 A IL 131057A
Authority
IL
Israel
Prior art keywords
rope
overspeed
governor
elevator car
brake
Prior art date
Application number
IL13105799A
Other versions
IL131057A0 (en
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
Publication of IL131057A0 publication Critical patent/IL131057A0/en
Publication of IL131057A publication Critical patent/IL131057A/en

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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/044—Mechanical overspeed governors
    • 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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B66B5/044—Mechanical overspeed governors
    • B66B5/046—Mechanical overspeed governors of the pendulum or rocker arm type
    • 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
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B66B5/185—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by acting on main ropes or main cables
    • 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
    • B66B7/08—Arrangements of ropes or cables for connection to the cars or cages, e.g. couplings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Abstract

A device for arresting the motion of an elevator installation consisting of an overspeed governor (5) which monitors the speed of an elevator car (1) connected to a counterweight (4) by means of a suspension rope (3), the movement of the elevator car or the counterweight being transmitted to the overspeed governor by means of a governor rope (6) which causes the elevator installation to be arrested if overspeed of the elevator car occurs, characterized in that: if overspeed occurs in either a downward or an upward direction, the elevator car is arrested by means of a double-arm rocker type overspeed governor (24) with a tripping mechanism (14) actuating a tripping lever actuating a rope brake (15).

Description

Device to arrest motion of an elevator installation Inventio AG C. 119002 Description : Device to Arrest Motion of an Elevator Installation The invention relates to a device for arresting the motion of an elevator installation consisting of an overspeed governor which monitors the speed of an elevator car, the elevator car being connected by means of a suspension rope to a counterweight, and the movement of the elevator car or counterweight being transmitted by means of a governor rope to the overspeed governor which causes the motion of the "elevator car to be arrested if overspeed occurs.
From patent specification DE 36 15 270 C2 an overspeed governor has become known which monitors the speed of travel of an elevator car. The elevator car has a wire rope which drives a rope pulley with an integral toothed wheel . A cam wheel imparts a rocking motion to a pivoted double- arm rocker which has a lug at one end. Mounted on the double-arm rocker in a pivoting manner is an actuating lever which is kept at rest relative to the double-arm rocker by means of a restraining device. The upper end of the actuating lever takes the form of an actuating dog and at the lower end there is a tripping lug which protrudes beyond a rocker lug. The two lugs are always in a position between two teeth on the toothed wheel when the roller follower is on a lobe on the cam wheel . When the roller follower is between two lobes on the cam wheel both lugs are raised out of the path of the teeth. As a result, the teeth on the toothed wheel pass under the lugs with no effect. At overspeed, the roller follower lifts off the cam wheel . The tripping lug remains in the path of the toothed wheel . A tooth of the toothed wheel strikes the tripping lug and displaces the actuating lever. This causes the actuating dog to operate a switch which switches off the drive. If the speed of the car increases further, the rocker lug enters into the path of the toothed wheel thereby jamming the toothed wheel and the rope pulley. The friction in the rope groove creates the force to trip a safety gear.
A disadvantage of the known device is that monitoring and arrest of the elevator car take place only in a downward direction.
It is in this respect that the invention aims to provide a remedy. The objective of the invention as characterized in Claim 1 is to avoid the disadvantages of the known device and to create a device which monitors the elevator car in an upward direction and in a downward direction and brings it to a standstill in an emergency.
The advantages resulting from the invention relate mainly to the fact that the releasing forces after arrest has taken place are very small . The engaged safety gear can be released by means of the available tractive capacity of the traction sheave, which is of particular significance on elevator installations having no machine room. Furthermore, the device according to the invention causes no additional load on the drive and does not give rise to excessive deceleration. The device according to the invention can be easily retrofitted on elevator installations without modifying the elevator car.
A more detailed description of the invention follows below by reference to drawings illustrating an embodiment.
The drawings show : Fig. 1 A schematic view of an elevator installation with the device for arresting motion of the elevator installation according to the invention; Fig. 2 A schematic view of an overspeed governor for actuating a rope brake which acts on a governor rope ; Fig. 3 A schematic view of the elevator installation with an exemplary embodiment of the device according to the invention for arresting the motion of an elevator installation; and Fig. 4 A schematic view of an overspeed governor for actuating a rope brake which acts on a suspension rope .
In Figs 1 to 4, number 1 designates an elevator car which can travel in an elevator hoistway (not shown) , the elevator car being connected to a counterweight 4 by means of a suspension rope 3 which passes over a traction sheave 2. To monitor the speed of the elevator car 1, or the counterweight 4, there is an overspeed governor 5 which operates, for example, on the principle of a pivoted double-arm rocker, the movement of the elevator car 1 or counterweight 4 being transmitted to the overspeed governor 5 by means of a governor rope 6. Governors operating, for example, on the principle of centrifugal force or inertia can also be used to monitor the speed. The governor rope 6 extends over the entire hoistway height, and at the lower end of the hoistway its direction is reversed and tension is applied by a return pulley 7, and at the upper end of the hoistway it is led over a rope pulley of the overspeed governor.
The ends of the governor rope 6 are attached to a first tripping lever 8 which is mounted in a pivoting manner on the elevator car 1 and which in the case of an emergency actuates a safety gear 9 mounted on the elevator car 1. After the elevator car 1 has been released from engagement of the safety gear, a resetting spring 10 resets the first tripping lever 8 and the safety gear 9. Mounted on the counterweight 4 is an arm 11 through which the governor rope passes. Close to the arm 11 is a spring thrust plate 12, which is rigidly fastened to the governor rope 6 and which supports a compensating spring 13 whose spring force presses it against the arm 11. The arm 11, spring thrust plate 12, and compensating spring 13 form an elastic rope linkage which is able to take up differing amounts of rope stretch between the suspension rope 3 and the governor rope 6. When overspeed of the elevator car 1 occurs in an upward direction, a tripping mechanism 14 of the overspeed governor 5 actuates a rope brake 15.
When overspeed of the elevator car 1 occurs in an upward direction, the overspeed governor 5 does not become jammed as it does at overspeed in a downward direction, but instead the rope brake 15 is actuated by the tripping mechanism 14. To prevent further acceleration of the elevator car 1 in an upward direction of travel, the rope brake 15 must compensate at least the unbalanced forces on the traction sheave 2. If the braking force is higher, the system will be decelerated depending on the moment of inertia of the installation. The braking force developed by the rope brake 15 must be at least as high as the maximum difference in rope forces at the traction sheave 2.
Fig. 2 shows details of the overspeed governor 5, the tripping mechanism 14, and the rope brake 15. The governor rope 6 passes over a rope pulley 17 which has a rope groove and is supported in a rotatable manner on a first axle 16. The first axle 16 is supported by a case 18. Mounted on the rope pulley 17 are a toothed wheel 19 with teeth 20, and a cam wheel 21 with lobes 22. Also mounted on the case 18 is a second axle 23 on which a double-arm rocker 24 having a follower roller 25 is mounted in a pivoting manner. At normal speed the follower roller 25 follows the surface of the cam wheel 21 with its lobes 22. At overspeed the 131057/2 follower roller 25 is no longer able to follow the surface of the cam due to the inertia of the double-arm rocker 24. Mounted on the opposite end of the double-arm rocker 24 from the follower roller 25 is a first lug 26 which at normal speed of the elevator car 1 enters the space between two teeth 20 of the toothed wheel when the follower roller 25 is on a cam lobe 22, and which is raised out of the path of the teeth 20 when the follower roller 25 is between two cam lobes 22. When the elevator car 1 travels at overspeed in a downward direction, the first lug 26 remains between two teeth 20, and the right-hand flank of the following tooth 20 hits the first lug 26 thereby jamming the toothed wheel 19 and with it the rope pulley 17. Due to the downward movement of the elevator car 1 relative to the jammed governor rope 6, the first tripping lever 8 engages the safety gear 9 and the elevator car 1 is held fast on the guiderails.
At the end of the double-arm rocker 24 opposite the follower roller 25 is an actuating plate 27 which is mounted in a pivoting manner on a third axle 28 of the double-arm rocker 24. The actuating plate 27 is held stationary relative to the double-arm rocker 24 by means of a restraining device, a snapper for example. At normal speed of the elevator car 1, a second lug 29 of the actuating plate 27 enters the space between two teeth 20 when the follower roller 25 is on a cam lobe 22, and is raised out of the path of the teeth 20 when the follower roller 25 is between two cam lobes 22. When the elevator car 1 travels at overspeed in an upward direction, the second lug 29 remains between two teeth 20, and the left-hand flank of the following tooth 20 hits the second lug 29, thereby causing the actuating plate 27 to turn in a clockwise direction. The toothed wheel 19 and with it the rope pulley 17 and the governor rope 6 continue their movement. The clockwise movement of the actuating plate 27 causes a finger 30 on the actuating plate 27 to turn a second tripping level 31 of the rope rake 15 in a counterclockwise direction about a fourth axle 32 on the rope brake 15, causing at least one brake shoe 34, which is moveable by means of at least one compression spring 33, to be released. The brake shoe 34 moves downward and is pressed against at least one opposite brake shoe 35 thereby braking the governor rope 6 which passes between the shoes 34, 35. The braking force applied to the governor rope 6 gently decelerates the elevator car 1 and the counterweight 4 and depends on the spring force of the compression spring 33, the surface of the shoes 34, 35, and the surface of the . governor rope 6. Deceleration of the counterweight 4 takes place via the governor rope 6, the spring thrust plate 12, and the arm 1 1.
Figures 3 and 4 show a device to arrest the motion of an elevator car 1 travelling at overspeed in an upward direction by means of a rope brake 15 acting on the suspension rope 3. By means of a Bowden cable 36 the movement of the second actuating lever 31, 32 is transmitted to the second actuating lever 31.1, 32.1 of the rope brake 15, the functioning of the rope brake 15 being unchanged.
In a further exemplary embodiment, the overspeed governor 5 can be used as a rope brake. In this variant, when the elevator car 1 travels at overspeed in an upward direction the toothed wheel 19 is jammed by means of a further lug mounted on the double-arm rocker 24. Provided that the governor rope 6 is very tightly pretensioned, the friction of the governor rope 6 in the rope groove specially formed for this purpose in the rope pulley 17 which is jammed, creates a sufficiently large braking force.
The overspeed governor 5 with the double-arm rocker 24 and the first lug 26 which is used to check for overspeed of the elevator car 1 in a downward direction can also be modified to check for overspeed of the elevator car 1 in an upward direction. Mounting the actuating plate 27 and the rope brake 15 is easily carried out.

Claims (7)

- 8 - 131057/2 CLAIMS:
1. A device for arresting the motion of an elevator installation consisting of an overspeed governor which monitors the speed of an elevator car connected to a counterweight by means of a suspension rope, the movement of the elevator car or the counterweight being transmitted to the overspeed governor by means of a governor rope which causes the elevator installation to be arrested if overspeed of the elevator car occurs, characterized in that: if overspeed occurs in either a downward or an upward direction, the elevator car is arrested by means of a double-arm rocker type overspeed governor with a tripping mechanism actuating a tripping lever actuating a rope brake.
2. A device for arresting the motion of an elevator installation according to claim 1 , characterized in that the rope brake is located on the governor rope, the governor rope being braked by a braking device of the rope brake if overspeed of the elevator car occurs in an upward direction.
3. A device for arresting the motion of an elevator installation according to claim 1 , characterized in that the rope brake is located on the suspension rope, the suspension rope being braked by a braking device of the rope brake if overspeed of the elevator car occurs in an upward direction.
4. A device for arresting the motion of an elevator installation according to claim 1 , characterized in that the overspeed governor includes a rope brake, the governor rope being - 9 - 131057/2 braked by friction in a rope pulley of the overspeed governor if overspeed of the elevator car occurs in an upward direction.
5. A device for arresting the motion of an elevator installation according to claims 1 to 3, characterized in that the tripping mechanism is an actuating plate which is mounted on a double-arm rocker of the overspeed governor and which is held at rest relative to the double-arm rocker by means of a restraining device and which when overspeed of the elevator car occurs in an upward direction can be displaced by means of a toothed wheel of the overspeed governor.
6. A device to arrest the motion of an elevator installation according to claims 1 to 3, characterized in that the rope brake has at least one spring, at least one brake shoe, and at least one opposite brake shoe, there being a tripping lever which can be actuated by the tripping mechanism to release the brake shoe, and the rope being braked by brake shoes which are pretensioned by means of a spring.
7. A device to arrest the motion of an elevator installation according to claim 2, characterized in that an elastic rope linkage is provided to connect the counterweight to the governor rope. For the Applicants REINHOLD COHN AND PARTNERS By: ΙΛ Ί
IL13105799A 1998-08-14 1999-07-23 Device to arrest motion of an elevator installation IL131057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98810779 1998-08-14

Publications (2)

Publication Number Publication Date
IL131057A0 IL131057A0 (en) 2001-01-28
IL131057A true IL131057A (en) 2002-07-25

Family

ID=8236249

Family Applications (1)

Application Number Title Priority Date Filing Date
IL13105799A IL131057A (en) 1998-08-14 1999-07-23 Device to arrest motion of an elevator installation

Country Status (15)

Country Link
EP (1) EP0980842B1 (en)
JP (1) JP2000211841A (en)
AR (1) AR021198A1 (en)
AT (1) ATE255534T1 (en)
BR (1) BR9903588A (en)
CZ (1) CZ293515B6 (en)
DE (1) DE59907918D1 (en)
ES (1) ES2212425T3 (en)
HU (1) HU223608B1 (en)
IL (1) IL131057A (en)
NO (1) NO320636B1 (en)
PL (1) PL197088B1 (en)
PT (1) PT980842E (en)
SK (1) SK285406B6 (en)
ZA (1) ZA995117B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832139B1 (en) * 2001-11-13 2004-08-06 Otis Elevator Co PARACHUTE COUNTERWEIGHT INSTALLATION FOR ELEVATOR
EP1350753B1 (en) * 2002-04-02 2008-05-07 Inventio Ag Device for engaging the emergency braking device of an elevator car
DE50309764D1 (en) * 2002-04-02 2008-06-19 Inventio Ag Device for engaging a safety gear for an elevator car
US7637357B2 (en) 2004-09-09 2009-12-29 Mitsubishi Electric Corporation Elevator apparatus with sheave rotational speed difference determination for detecting an abnormality
CN101973474B (en) * 2010-11-08 2012-07-18 日立电梯(上海)有限公司 Elevator overspeed protective device
BR112013021886A2 (en) * 2011-03-09 2016-11-01 Inventio Ag test method and device for testing a speed limitation system of an elevator installation
CN103754724B (en) * 2014-01-06 2015-11-11 中国矿业大学 Device and method for driving speed limiter rope wheel during checking of elevator speed limiter
JP6296973B2 (en) * 2014-12-24 2018-03-20 株式会社日立製作所 Speed governor and elevator device
CN106006300A (en) * 2016-07-27 2016-10-12 江南嘉捷电梯股份有限公司 Elevator speed governor system
EP3517473A1 (en) * 2018-01-25 2019-07-31 KONE Corporation Inertia brake for braking a governor rope of a governor system of an elevator system
CN109693980B (en) * 2019-02-21 2021-03-19 联想(北京)有限公司 Elevator dispatching method, device and system
EP3819245A1 (en) * 2019-11-08 2021-05-12 KONE Corporation An elevator
GR1010279B (en) * 2021-10-12 2022-08-05 Ευαγγελος Νικολαου Κλαμπανης Speed regulator's security mechanism

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669181A5 (en) * 1985-08-29 1989-02-28 Inventio Ag PRELIMINARY DEVICE ON A CAM WHEEL SPEED LIMITER FOR ELEVATOR.
US5197571A (en) * 1991-06-03 1993-03-30 Burrell Michael P Self centering elevator cable safety brake
US5183979A (en) * 1991-07-22 1993-02-02 Otis Elevator Company Elevator governor rope restraint when elevator car moves with car doors open
US5299661A (en) * 1992-11-03 1994-04-05 Otis Elevator Company Mechanical overspeed safety device
US5495919A (en) * 1994-04-25 1996-03-05 Otis Elevator Company Safety brake apparatus for an elevator car or counterweight
US5617933A (en) * 1995-06-13 1997-04-08 Otis Elevator Company Bi-directional elevator governor

Also Published As

Publication number Publication date
PL334896A1 (en) 2000-02-28
HUP9902702A2 (en) 2000-09-28
CZ293515B6 (en) 2004-05-12
NO993924D0 (en) 1999-08-13
EP0980842B1 (en) 2003-12-03
PL197088B1 (en) 2008-02-29
SK285406B6 (en) 2007-01-04
SK105099A3 (en) 2000-05-16
HU9902702D0 (en) 1999-10-28
HU223608B1 (en) 2004-10-28
ES2212425T3 (en) 2004-07-16
DE59907918D1 (en) 2004-01-15
ATE255534T1 (en) 2003-12-15
EP0980842A1 (en) 2000-02-23
PT980842E (en) 2004-04-30
IL131057A0 (en) 2001-01-28
JP2000211841A (en) 2000-08-02
NO320636B1 (en) 2006-01-09
ZA995117B (en) 2000-11-16
HUP9902702A3 (en) 2001-05-28
BR9903588A (en) 2000-09-05
NO993924L (en) 2000-02-15
CZ289499A3 (en) 2000-02-16
AR021198A1 (en) 2002-07-03

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