EP1806310B1 - Emergency stop device for elevator - Google Patents

Emergency stop device for elevator Download PDF

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Publication number
EP1806310B1
EP1806310B1 EP04793007A EP04793007A EP1806310B1 EP 1806310 B1 EP1806310 B1 EP 1806310B1 EP 04793007 A EP04793007 A EP 04793007A EP 04793007 A EP04793007 A EP 04793007A EP 1806310 B1 EP1806310 B1 EP 1806310B1
Authority
EP
European Patent Office
Prior art keywords
emergency stop
malfunction prevention
governor
speed
elevator
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.)
Expired - Fee Related
Application number
EP04793007A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1806310A1 (en
EP1806310A4 (en
Inventor
Akinari c/o Inaryo Technica Co. Ltd. KAJITA
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1806310A1 publication Critical patent/EP1806310A1/en
Publication of EP1806310A4 publication Critical patent/EP1806310A4/en
Application granted granted Critical
Publication of EP1806310B1 publication Critical patent/EP1806310B1/en
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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
    • B66B5/02—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
    • B66B5/06—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed electrical
    • 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

Definitions

  • the present invention relates to a safety device for stopping an elevator in case of an emergency.
  • a conventional emergency stop device incorporated into an elevator, when a relatively upward force is given to a connecting means, to which one end of a governor rope of a governor is fixed, by a shake of a cage or by an inertial force generated at the time of start of the elevator and when an action of the elevator exceeds a predetermined value, the emergency stop device is operated.
  • Patent Document 1 discloses a technique of preventing malfunction of an emergency stop device for stopping an elevator.
  • an end portion of the lifting lever on the shaft side has a cam, and a curved surface seat coming into contact with the cam is provided and a coil spring for pushing the curved surface seat by a predetermined force is also provided. Due to the above structure, when a force not less than a predetermined force is given to the governor rope and an action of the governor rope exceeds a predetermined value, the braking piece can be moved upward.
  • Patent Document 1 JP-A-5-319724
  • a mechanism for preventing the occurrence of malfunction is composed so that it can give a pushing force to a lifting lever. Therefore, in order to move the braking piece upward by operating the lifting lever, it is necessary to give a force, the intensity of which is not less than a predetermined value. Further, in order to get over a cam shape, it is necessary for the lifting lever to be rotated by a predetermined rotation. Therefore, a delay of the emergency stop operation is caused.
  • the present invention has been accomplished to solve the above problems. It is an object of the present invention to provide an emergency stop device of an elevator characterized in that: while the occurrence of malfunction is being prevented, a delay of the emergency stop action is reduced.
  • the present invention provides an emergency stop device of an elevator comprising: a cage; a guide rail; a governor; a governor rope; a connecting means, to one end of which the governor rope is connected; an emergency stop means operated according to a position of the other end of the connecting means, for obtaining a braking force for the cage coming into pressure contact with the guide rail; a malfunction prevention means for preventing malfunction when a predetermined pushing force is given to the action of the emergency stop means; and a malfunction prevention release means for releasing the predetermined pushing force given by the malfunction prevention means according to a cage speed when the cage speed exceeds a predetermined value.
  • the emergency stop device of an elevator comprises: a cage; a guide rail; a governor; a governor rope; a connecting means, to one end of which the governor rope is connected; an emergency stop means operated according to a position of the other end of the connecting means, for obtaining a braking force for the cage coming into pressure contact with the guide rail; a malfunction prevention means for preventing malfunction when a predetermined pushing force is given to the action of the emergency stop means; and a malfunction prevention release means for releasing the predetermined pushing force given by the malfunction prevention means according to a cage speed when the cage speed exceeds a predetermined value. Therefore, it is possible to improve a delay of the action of the emergency stop means caused by the pushing force given by the malfunction prevention means.
  • Electromagnetic switch 11 Emergency stop lever, 12 Emergency stop means body, 13 Braking piece, 14 Connecting lever, 15 Guide, 16 Roller, 17 Spring, 18 Pin, 19 Malfunction prevention means, 20 Spring, 21 Electromagnetic switch body, 22 Electromagnet, 23 Connecting lever, 23a Hole, 24 Electromagnetic switch, 25 Stopper, 26 Movable piece, 26a Pin, 27 Electromagnetic switch body, 28 Stopper, 29 Indication pin
  • Fig. 1 is a view showing a safety device of an elevator of Embodiment 1 of the present invention.
  • the cage 2 is elevated along the guide rails 1 in an elevating passage.
  • the endless governor rope 3, which is arranged in parallel with the guide rails 1, is wound round the governor 4 and the governor rope pulley 5.
  • the governor rope 3 is fixed to one end of the lifting rod 6 which is a connecting means.
  • the other end of the lifting rod 6 is pivotally fixed to a component of the emergency stop means 7. The component will be described later.
  • the governor 4 the shape of which is formed into a disk-shape or a ball-shape, is a device for adjusting a rotation of a rotary body by changing a rotary speed into a centrifugal force so that the rotary speed can be maintained constant irrespective of a change in a load given to the rotary body.
  • the governor 4 is rotated synchronously with an electric motor used for winding a cage. For example, when an overspeed of the cage reaches the first speed, which is a predetermined speed and lower than 1.3 times of the rated speed, an electric power source of the winding motor is turned off and an electromagnetic brake is operated at the same time.
  • the switch 8 is provided which is mechanically changed over by a centrifugal force generated by the pulley when the overspeed of the cage has reached the first speed.
  • the control means 9, which is electrically connected to the switch 8 receives an OFF signal from the switch 8, so that the electromagnetic switch 10 can be operated.
  • a mechanical overspeed switch which is conventionally arranged, for turning off the electric power source of the winding electric motor when the speed has reached the first speed.
  • the switch 8, the control means 9 and the electromagnetic switch 10 are respectively components provided for the malfunction prevention release means.
  • Fig. 2 is an arrangement view of the emergency stop means 7 composing the safety device of the elevator of Embodiment 1 of the present invention.
  • the other end portion of the lifting rod 6 is pivotally fixed to one end portion of the emergency stop lever 11 which is a component of the emergency stop device 7.
  • the emergency stop lever 11 is pivotally fixed to the hole 12a with respect to the emergency stop means body 12 of the emergency stop means 7.
  • the emergency stop lever 11 of the emergency stop means 7 is pivotally attached to one end of the braking piece 13 and also attached to one end of the connecting lever 14.
  • the emergency stop lever 11 is composed so that it can not be rotated counterclockwise from the present position by the stopper 28. Accordingly, the lifting rod 6 can not be moved downward from the present position.
  • Fig. 3 is a sectional view taken on line B - B in Fig. 2 showing the emergency stop means 7 composing the safety device of the elevator of Embodiment 1 of the present invention.
  • the lifting rod 6 is raised, two braking pieces 13 connected to the emergency stop lever 11 is moved upward. Then, both the braking pieces 13 are moved inward by the rollers 16 pivotally fixed to the guides 15 and slid with the guide rail 1, so that a braking force can be obtained.
  • Each guide 15 is fixed to the emergency stop means body 12 through the spring 17. Therefore, by a force given to the guide 15 by the spring 17, an intensity of the braking force, which is generated by the sliding motion between the guide rail 1 and the braking piece 13, is determined.
  • the pin 18 composes a portion of the electromagnetic switch 10 which is the malfunction prevention release means. Therefore, when the electromagnetic switch 10 is operated and the pin 18 is reciprocated, the connecting lever 14 and the malfunction prevention means 19 can be connected to and released from each other. Accordingly, the malfunction release motion is not affected by the spring force generated by the spring provided in the malfunction prevention means 19 . Therefore, no delay is caused and the emergency stop operation can be quickly conducted.
  • Fig. 4 is an operation view of a connecting lever 14, which composes a safety device of the elevator of Embodiment 1 of the present invention, and a malfunction prevention means 19 and also Fig. 4 is a sectional view of an electromagnetic switch 10 in this case.
  • Fig. 4 (a) is a view showing a normal state
  • Fig. 4 (b) is a view showing a state in which the governor 4 is operating at the first speed
  • Fig. 4 (c) is a view showing a state in which the governor 4 is operating at the second speed.
  • the view on the lower side is an operation view of the connecting lever 14 and the malfunction prevention means 19, and the view on the upper side is a sectional view of the electromagnetic switch 10 at the time.
  • the pin 18 is connected to the electromagnetic switch body 21 through the spring 20, and a force is always given to the pin 18 by the spring 20 so that the pin 18 can be pulled in the direction of the electromagnetic switch body 21.
  • the pin 18 is fixed while coming into contact with the electromagnet 22. Accordingly, since the pin 18 is located on the electromagnet 22 side in the usual case, the pin 18 is engaged in the holes provided in the connecting lever 14 and the malfunction prevention means 19.
  • Fig. 5 is a view showing a state in which the emergency stop means 7 composing the emergency stop device of the elevator of Embodiment 1 of the present invention is operated. Since the connecting lever 14 and the malfunction prevention means 19 are not connected to each other, when the lifting rod 6 is given a force upward, it is moved upward, so that the emergency stop lever 11 can be rotated and the braking piece 13 can be also moved upward. Therefore, the guide rail 1 and the braking piece 13 are slid on each other, and a braking force can be obtained. At this time, the emergency braking operation can be conducted. In this case, even when the lifting rod 6 is given an upward force, it is not affected by the pushing force of the malfunction prevention means 19. Therefore, the emergency stop operation can be conducted without causing any delay.
  • the emergency stop device of an elevator includes: a cage 2; a guide rail 1; a governor 4; a governor rope 3; a lifting rod 6, to one end of which the governor rope 3 is connected; an emergency stop means 7 operated according to a position of the other end of the lifting rod 6, for obtaining a braking force to brake the cage 2 by sliding on the guide rail 1; a malfunction prevention means 19 for giving a predetermined load so as to operate the emergency stop means 7; and an electromagnetic switch 10 for releasing the predetermined load given to the malfunction prevention means 19 when the control means 9 conducts controlling according to a signal inputted from the switch 8. Therefore, a delay of the emergency stop means 7 can be improved which is caused by a pushing force generated by the malfunction prevention means 19.
  • the control means 9 electrically connected to the switch 8 receives an OFF signal from the switch 8, so that an electric current of the electromagnet 22 in the electromagnetic switch 10, which is a component of the emergency stop device 7, can be shut off.
  • the following constitution may be adopted.
  • the control means 9 electrically connected to the switch 8 receives an ON signal from the switch 8, so that an electric current of the electromagnet 22 in the electromagnetic switch 10, which is a component of the emergency stop device 7, can be applied.
  • the spring 20 In the constitution of the electromagnetic switch 10, the spring 20 must be composed so that it can generate a force in the direction in which the electromagnetic switch body 21 and the pin 18 are always contacted with each other.
  • an electric current is made to flow in the electromagnet 22
  • the first and the second speed the second speed must be higher than the first speed, and the first speed must be higher than the rated speed.
  • the first speed is not necessarily 1.3 or 1.4 times higher than the rated speed as exemplarily shown here.
  • Fig. 6 is an operation view of a connecting lever 23, which composes an emergency stop device of an elevator of Embodiment 2 of the present invention, and a malfunction prevention means 19 and also Fig. 6 is a sectional view of an electromagnetic switch 24 in this case.
  • portions not shown in the drawing are the same as those of Embodiment 1, and like reference characters are used to indicate like parts in Figs. 4 and 6 .
  • one end of the emergency stop lever 11 is pivotally fixed to one end of the connecting lever 23.
  • An L-shaped hole 23a is formed at the other end of the connecting lever 23 .
  • This hole 23a is engaged with the rod-shaped stopper 25 fixed to the malfunction prevention section 19.
  • the connecting lever 23 is engaged with the movable piece 26 to which two pins 26a are fixed.
  • the movable piece 26 composes one component of the electromagnetic switch 24.
  • the other components of the electromagnetic switch 24, which is a malfunction prevention release means includes: an electromagnetic switch body 27; a spring 20 for generating a pushing force between the electromagnetic switch body 27 and the movable piece 26; and an electromagnet 22, which is fixed to the electromagnetic switch body 27, for generating an attraction force with the movable piece 26.
  • the movable piece 26 Since an electric current always flows in the electromagnet 22 fixed to the electromagnetic switch 24 at the usual time, the movable piece 26 is fixed, coming into contact with the electromagnet 22. Accordingly, at the usual time, the rod-shaped stopper 25, which is fixed to the malfunction prevention section 19, is located on the upper side of the L-shaped hole 23a. Therefore, the connecting lever 23 can not be moved to the right or the left by a force lower than the pushing force of the malfunction prevention section 19.
  • the emergency stop device of an elevator of the present invention is suitably used for a safety device incorporated into an elevator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
EP04793007A 2004-10-27 2004-10-27 Emergency stop device for elevator Expired - Fee Related EP1806310B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/015895 WO2006046284A1 (ja) 2004-10-27 2004-10-27 エレベータの非常停止装置

Publications (3)

Publication Number Publication Date
EP1806310A1 EP1806310A1 (en) 2007-07-11
EP1806310A4 EP1806310A4 (en) 2012-03-21
EP1806310B1 true EP1806310B1 (en) 2013-03-27

Family

ID=36227536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04793007A Expired - Fee Related EP1806310B1 (en) 2004-10-27 2004-10-27 Emergency stop device for elevator

Country Status (4)

Country Link
EP (1) EP1806310B1 (zh)
JP (1) JPWO2006046284A1 (zh)
CN (1) CN100528727C (zh)
WO (1) WO2006046284A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2837592A1 (en) * 2013-08-13 2015-02-18 Aplicaciones Electromecanicas Gervall, S.A. Driving system for a lift safety gear
JP6188962B2 (ja) * 2014-09-22 2017-08-30 三菱電機株式会社 エレベータ装置
JP6505249B2 (ja) * 2015-11-26 2019-04-24 三菱電機株式会社 エレベータかごの非常止め装置
EP3309104B1 (en) * 2016-10-14 2019-10-09 KONE Corporation Method for avoiding unwanted safety gear tripping in an elevator system, controller adapted to perform such a method, governor brake and elevator system each having such a controller
CN109693986B (zh) * 2017-10-23 2021-03-12 上海三菱电梯有限公司 防止电梯意外制动的方法
CN110282519B (zh) 2018-03-19 2022-05-17 奥的斯电梯公司 限速系统、释放装置、电梯限速系统和电梯
CN110526048B (zh) * 2019-08-08 2022-01-07 深圳市海浦蒙特科技有限公司 一种强驱电梯的控制方法及系统
WO2021214867A1 (ja) * 2020-04-21 2021-10-28 株式会社日立製作所 非常止め装置及びエレベーター
WO2022013939A1 (ja) * 2020-07-14 2022-01-20 株式会社日立製作所 エレベータ装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031749B2 (ja) * 1977-08-13 1985-07-24 株式会社日立製作所 エレベ−タ安全装置
JP2626408B2 (ja) * 1992-05-20 1997-07-02 三菱電機株式会社 エレベータ用非常停止装置
US6161653A (en) * 1998-12-22 2000-12-19 Otis Elevator Company Ropeless governor mechanism for an elevator car
JP2000219450A (ja) * 1999-02-01 2000-08-08 Toshiba Corp エレベータ装置
JP2001122549A (ja) * 1999-10-25 2001-05-08 Hitachi Ltd エレベーターのガバナ
JP2002068634A (ja) * 2000-08-29 2002-03-08 Hitachi Ltd エレベータの非常止め装置
JP4369156B2 (ja) * 2002-05-02 2009-11-18 インベンテイオ・アクテイエンゲゼルシヤフト エレベータかご用の安全制動装置を係合するための機器
DE10300993A1 (de) * 2003-01-14 2004-07-22 Aufzugswerke M. Schmitt & Sohn Gmbh & Co. Bremsvorrichtung für eine Aufzuganlage
MY135853A (en) * 2003-02-04 2008-07-31 Inventio Ag Safety device for an elevator

Also Published As

Publication number Publication date
WO2006046284A1 (ja) 2006-05-04
EP1806310A1 (en) 2007-07-11
JPWO2006046284A1 (ja) 2008-05-22
EP1806310A4 (en) 2012-03-21
CN1930072A (zh) 2007-03-14
CN100528727C (zh) 2009-08-19

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