WO2002051737A1 - Safety device for an elevator - Google Patents

Safety device for an elevator Download PDF

Info

Publication number
WO2002051737A1
WO2002051737A1 PCT/FI2001/001135 FI0101135W WO02051737A1 WO 2002051737 A1 WO2002051737 A1 WO 2002051737A1 FI 0101135 W FI0101135 W FI 0101135W WO 02051737 A1 WO02051737 A1 WO 02051737A1
Authority
WO
WIPO (PCT)
Prior art keywords
safety device
elevator
shaft
safety
space
Prior art date
Application number
PCT/FI2001/001135
Other languages
French (fr)
Inventor
Jukka MÄKI
Marco Steen
Seppo Ketoviita
Original Assignee
Kone Corporation
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 Kone Corporation filed Critical Kone Corporation
Priority to EP01994849.6A priority Critical patent/EP1343712B1/en
Publication of WO2002051737A1 publication Critical patent/WO2002051737A1/en
Priority to HK04102569A priority patent/HK1059614A1/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
    • B66B5/0043—Devices enhancing safety during maintenance
    • B66B5/005—Safety of maintenance personnel

Definitions

  • the present invention relates to an elevator safety device as defined in the preamble of claim 1.
  • a safety buffer arrangement provided for maintenance purposes at the bottom of the elevator shaft.
  • the safety buffers according to said application can be arranged in the path of the elevator car so as to prevent the car from moving downward beyond a certain distance from the bottom of the shaft and likewise below the counterweight to prevent the car from moving upward beyond a certain dis- tance from the top of the shaft.
  • the safety devices according to this specification are arranged on the bottom of the shaft in a lying position, from which they can be raised into the path of the car or counterweight when necessary. However, when lying on the bottom of the shaft, they take up some space in the vertical direction as well, and so they are not applicable in solutions where the space below the car is very small.
  • Another way of providing a safety space is to use removable buffer beams, which are mounted in place temporarily to allow maintenance operations when a safety space is needed.
  • the known solutions occupy a space under the car when it is moving and are difficult to automate.
  • the object of the invention is to disclose a new type of safety device designed to ensure a sufficient space above and below the elevator car in a maintenance situation in the case of elevators having a small shaft space.
  • the invention is based on the idea of making as efficient use of the empty space at the shaft bottom as possible so that the safety device need not take up any space in the vertical direction under the car unit (consisting of the car and the car frame) during normal operation of the elevator. Placing the safety device in the space between the counterweight and the car unit on the bottom of the shaft allows it to remain out of the way of the car unit when the latter is moving.
  • the safety device of the invention prevents the motion of the car unit by being turned to a position under the car unit, with the result that buffers attached to the underside of the car unit hit the safety device and the car unit stops at a certain height from the shaft bottom.
  • the safety device of the invention can be easily automated. Being placed between the car unit and the counterweight, it does not occupy any space under the elevator when the latter is moving. Therefore, it can be used in elevators having a very small space below the car. This safety device can also be used in other types of elevator.
  • the safety device has a plate-like structure that also allows it to function as a guard structure between movable parts in the shaft.
  • Fig. 1 presents a safety device according to the invention.
  • Fig. 2 presents the safety device in normal position.
  • Fig. 3 presents the safety device in operating position.
  • Fig. 1 presents a safety device 1 according to the invention, made of a durable material, such as steel, comprising a plate-like stopping device hinged on the shaft bottom by pivots 6. Fitted on the upper end of the stopping device is a rail 5 provided with two supports 8 designed to meet safety buffers attached to the underside of the car unit 9. The safety buffers may also be mounted on the safety device, and their function is to dampen the impact.
  • the car unit comprises the car and the car frame or only the car.
  • the safety device turns on its pivots 6 between a normal position and an operating position.
  • the safety device also comprises a locking device 7, which locks the safety device 1 in the operating position. The locking device can be opened and closed manually.
  • the safety de- vice also comprises a holding mechanism 20, such as a magnet, designed to hold the safety device in the operating position.
  • the magnet grabs the elevator guide rails.
  • the holding mechanism also holds the safety device in the normal position, with the magnet grabbing a shaft structure and thus holding the device in an upright position.
  • the safety device is provided with a micro switch for identifying its position and giving the elevator control system data indicating a safety guarding position.
  • the safety device 1 is in the normal position, which is used when the elevator is operating normally between floors.
  • the safety device is placed on the bottom 10 of the shaft in a space 14 between the counterweight and the car unit.
  • the car unit comprises a car 19 and a car frame 18 or only a car 19.
  • Space 14 comprises the space between one outer edge 15 of the car unit and a shaft wall 13, in which space the counterweight 16 is moving.
  • the figure shows the counterweight 16, although in reality it cannot be in the lower part of the shaft when the car unit is at the bottom floor. In the situation presented in the figure, the car unit 9 has reached the bottom floor.
  • the safety device is well applicable for use in a solution with a small space below the car as it does not take up any space under the car unit when the latter is moving.
  • the car unit is first stopped at a position where the serviceman can get onto the car top after having opened the doors 11.
  • the top of the car unit is provided with a rail-like safety device 12 that can be turned on the top of the car unit into a safety guarding position.
  • Fig. 3 presents the safety device 1 in an operating position, in which it stops the car unit at a certain height from the shaft bottom 10, thus ensuring a safety space.
  • the safety device 1 is mounted on the bottom by pivots 6, of which there are a total of two for one safety device.
  • a serviceman wants to work on the shaft bottom, he first opens the door on the bottom floor, thereby preventing movement of the eleva- tor.
  • the serviceman enters the shaft pit and releases the safety device 1 from its holding mechanism and turns it into the operating position, into the path of the car unit.
  • the safety device is now locked by the locking device and the holding mechanism, ensuring that a safety space exists in the pit.
  • the safety device is turned into its normal position, the upright position, whereupon the person leaves the pit and the elevator control system is given data indicating that the elevator is allowed to move.

Landscapes

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

Abstract

Elevator safety dvice (1) for implementing a safety space, said elevator comprising an elevator shaft, a shaft bottom (10), a car unit (9), a counterweight (16), landing doors (11) , a space (14) defined by an outer edge (15) of the car unit and the corresponding wall (13) of the shaft, in which space the counterweight can be moved. The safety device (1) has been arranged on the bottom (10) of the shaft in the space defined by an outer edge of the car unit and the corresponding shaft wall so that it is not in the path of the counterweight and that, in an operation position, the safety device (1) can be brought into the path of the car unit (9).

Description

SAFETY DEVICE FOR AN ELEVATOR
The present invention relates to an elevator safety device as defined in the preamble of claim 1.
When elevators are installed in old buildings, it is often necessary to use solutions that take up as little space as possible. If the spaces at the top and bottom of the elevator shaft are to be enlarged, the work is often either impossible to implement in view of constructional aspects or expensive to carry out. Still, safety spaces for maintenance purposes as required by safety regulations have to be provided above and below the car.
According to Finnish application 980594, to ensure the required safety space, a safety buffer arrangement provided for maintenance purposes at the bottom of the elevator shaft is known. The safety buffers according to said application can be arranged in the path of the elevator car so as to prevent the car from moving downward beyond a certain distance from the bottom of the shaft and likewise below the counterweight to prevent the car from moving upward beyond a certain dis- tance from the top of the shaft. The safety devices according to this specification are arranged on the bottom of the shaft in a lying position, from which they can be raised into the path of the car or counterweight when necessary. However, when lying on the bottom of the shaft, they take up some space in the vertical direction as well, and so they are not applicable in solutions where the space below the car is very small. Another way of providing a safety space is to use removable buffer beams, which are mounted in place temporarily to allow maintenance operations when a safety space is needed. However, the known solutions occupy a space under the car when it is moving and are difficult to automate.
The object of the invention is to disclose a new type of safety device designed to ensure a sufficient space above and below the elevator car in a maintenance situation in the case of elevators having a small shaft space. The invention is based on the idea of making as efficient use of the empty space at the shaft bottom as possible so that the safety device need not take up any space in the vertical direction under the car unit (consisting of the car and the car frame) during normal operation of the elevator. Placing the safety device in the space between the counterweight and the car unit on the bottom of the shaft allows it to remain out of the way of the car unit when the latter is moving. When necessary, the safety device of the invention prevents the motion of the car unit by being turned to a position under the car unit, with the result that buffers attached to the underside of the car unit hit the safety device and the car unit stops at a certain height from the shaft bottom.
The invention is characterized by what is presented in the characterization part of claim 1. Other embodiments of the invention are characterized by what is presented in the other claims .
By using a safety device according to the invention, an advantageous implementation of a safety space with a small movement is ensured. The safety device of the invention can be easily automated. Being placed between the car unit and the counterweight, it does not occupy any space under the elevator when the latter is moving. Therefore, it can be used in elevators having a very small space below the car. This safety device can also be used in other types of elevator. The safety device has a plate-like structure that also allows it to function as a guard structure between movable parts in the shaft.
In the following, the invention will be described in detail with reference to the attached drawings.
Fig. 1 presents a safety device according to the invention.
Fig. 2 presents the safety device in normal position.
Fig. 3 presents the safety device in operating position. Fig. 1 presents a safety device 1 according to the invention, made of a durable material, such as steel, comprising a plate-like stopping device hinged on the shaft bottom by pivots 6. Fitted on the upper end of the stopping device is a rail 5 provided with two supports 8 designed to meet safety buffers attached to the underside of the car unit 9. The safety buffers may also be mounted on the safety device, and their function is to dampen the impact. The car unit comprises the car and the car frame or only the car. The safety device turns on its pivots 6 between a normal position and an operating position. The safety device also comprises a locking device 7, which locks the safety device 1 in the operating position. The locking device can be opened and closed manually. In addition to the locking device, the safety de- vice also comprises a holding mechanism 20, such as a magnet, designed to hold the safety device in the operating position. The magnet grabs the elevator guide rails. The holding mechanism also holds the safety device in the normal position, with the magnet grabbing a shaft structure and thus holding the device in an upright position. The safety device is provided with a micro switch for identifying its position and giving the elevator control system data indicating a safety guarding position.
In Fig. 2, the safety device 1 is in the normal position, which is used when the elevator is operating normally between floors. The safety device is placed on the bottom 10 of the shaft in a space 14 between the counterweight and the car unit. The car unit comprises a car 19 and a car frame 18 or only a car 19. Space 14 comprises the space between one outer edge 15 of the car unit and a shaft wall 13, in which space the counterweight 16 is moving. The figure shows the counterweight 16, although in reality it cannot be in the lower part of the shaft when the car unit is at the bottom floor. In the situation presented in the figure, the car unit 9 has reached the bottom floor. It can be seen that the safety device is well applicable for use in a solution with a small space below the car as it does not take up any space under the car unit when the latter is moving. When there is a need to work above the car unit 9 on the top of the car, the car unit is first stopped at a position where the serviceman can get onto the car top after having opened the doors 11. To ensure a top safety space for the service- man, the top of the car unit is provided with a rail-like safety device 12 that can be turned on the top of the car unit into a safety guarding position.
Fig. 3 presents the safety device 1 in an operating position, in which it stops the car unit at a certain height from the shaft bottom 10, thus ensuring a safety space. The safety device 1 is mounted on the bottom by pivots 6, of which there are a total of two for one safety device. When a serviceman wants to work on the shaft bottom, he first opens the door on the bottom floor, thereby preventing movement of the eleva- tor. Next, the serviceman enters the shaft pit and releases the safety device 1 from its holding mechanism and turns it into the operating position, into the path of the car unit. The safety device is now locked by the locking device and the holding mechanism, ensuring that a safety space exists in the pit. To restore the normal operating state of the elevator, the safety device is turned into its normal position, the upright position, whereupon the person leaves the pit and the elevator control system is given data indicating that the elevator is allowed to move.
It is obvious to the person skilled in the art that different embodiments of the invention are not limited to the examples described above, but that they may be varied within the scope of the following claims.

Claims

1. Elevator safety device (1) for implementing a safety space, said elevator comprising an elevator shaft, a shaft bottom (10), a car unit (9), a counterweight (16), landing doors (11) , a space (14) defined by an outer edge (15) of the car unit and the corresponding wall (13) of the shaft, in which space the counterweight can be moved, characterized in that the safety device (1) has been arranged on the bottom (10) of the shaft in the space defined by an outer edge of the car unit and the corresponding shaft wall so that it is not in the path of the counterweight and that, in an operating position, the safety device (1) can be brought into the path of the car unit (9) .
2. Elevator safety device as defined in claim 1, characterized in that in the normal position, when the elevator is traveling, the safety device (1) is in a substantially upright position relative to the bottom (10) of the shaft, between the car unit (9) and the counterweight (16) .
3. Elevator safety device as defined in claim 1 or 2 , characterized in that the safety device comprises a stopping device (4) hinged on the bottom (10) of the shaft.
4. Elevator safety device as defined in claim 3, characterized in that the stopping device (4) is of a plate-like structure and is mounted on the bottom (10) of the shaft via pivots (6) located at its lower edge.
5. Elevator safety device as defined in claim 3 or 4, characterized in that the stopping device (4) has a rail (5) at its upper end.
6. Elevator safety device as defined in any one of the preceding claims, characterized in that the safety device comprises a micro switch that gives the elevator control system data indicating a safety guarding position and an inhibition of normal operation.
7. Elevator safety device as defined in any one of the preceding claims, characterized in that the safety device comprises a locking device (7) and a holding mechanism (20) for locking the safety device in the operating posi- tion.
8. Elevator safety device as defined in claim 5, characterized in that the rail (5) of the safety device (1) is provided with supports (8) which in the operating position are hit by safety buffers provided on the underside of the car unit.
9. Elevator safety device as defined in claim 1, characterized in that the top of the car unit is provided with a safety rail (12) to implement a sufficient overhead safety space.
PCT/FI2001/001135 2000-12-22 2001-12-19 Safety device for an elevator WO2002051737A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01994849.6A EP1343712B1 (en) 2000-12-22 2001-12-19 Safety device for an elevator
HK04102569A HK1059614A1 (en) 2000-12-22 2004-04-13 Safety device for an elevator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20002851 2000-12-22
FI20002851A FI112640B (en) 2000-12-22 2000-12-22 Elevator safety device

Publications (1)

Publication Number Publication Date
WO2002051737A1 true WO2002051737A1 (en) 2002-07-04

Family

ID=8559810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/001135 WO2002051737A1 (en) 2000-12-22 2001-12-19 Safety device for an elevator

Country Status (5)

Country Link
EP (1) EP1343712B1 (en)
CN (1) CN1224570C (en)
FI (1) FI112640B (en)
HK (1) HK1059614A1 (en)
WO (1) WO2002051737A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077243B2 (en) 2003-05-21 2006-07-18 Inventio Ag Elevator installation with a buffer for creating a zone of protection in an elevator installation and a method of creating a zone of protection
WO2008056026A1 (en) * 2006-11-10 2008-05-15 Kone Corporation Traction sheave elevator without counterweight
EP2050703A3 (en) * 2007-10-16 2009-07-22 Exclusive Lift GmbH Lift assembly for people and/or loads with at least one lift cabin
WO2013025185A1 (en) * 2011-08-12 2013-02-21 Otis Elevator Company Low pit access detection and monitoring
US11078043B2 (en) 2017-05-12 2021-08-03 Otis Elevator Company Elevator overrun systems

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101068742B (en) * 2004-11-30 2010-12-22 奥蒂斯电梯公司 Elevator car with fold-away shock absorbing legs, and the corresponding elevator
EP2838827B1 (en) * 2012-04-20 2020-07-15 KONE Corporation Testing apparatus and safety arrangement
MY176465A (en) 2013-10-29 2020-08-11 Otsuka Pharma Co Ltd Synthetic route to 2?-deoxy-2?,2?-difluorotetrahydrouridines
CN108137276A (en) * 2015-09-25 2018-06-08 奥的斯电梯公司 Accessible formula buffer of elevator
US20220024719A1 (en) * 2018-12-19 2022-01-27 Inventio Ag Device for creating a temporary protective space
US11691847B2 (en) 2019-06-20 2023-07-04 Tk Elevator Corporation Elevator travel blocking apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129678A1 (en) * 1983-05-25 1985-01-02 G.M.V. SERVICE S.r.l. Automatic device for lifts or goods-lifts without safety lift-shafts
SE456417B (en) * 1984-03-20 1988-10-03 Sven Agren Lift shaft with cage
CH667638A5 (en) * 1985-09-27 1988-10-31 Inventio Ag Safety device for maintenance space under lift cabin - has prop swung outwards under cabin after carrier arm has been positioned
JPH0318575A (en) * 1989-06-16 1991-01-28 Mitsubishi Electric Corp Operating circuit for elevator
NL9100059A (en) * 1991-01-11 1992-08-03 Otis Liften B V Lift-cage position locking mechanism - has gravity operated locks providing lower and upper safety zones within a lift shaft
JPH0958942A (en) * 1995-08-22 1997-03-04 Mitsubishi Denki Bill Techno Service Kk Space keeping device of elevator
US5727657A (en) * 1995-01-31 1998-03-17 Inventio Ag Apparatus for blocking elevator car travel
US5806633A (en) * 1995-12-22 1998-09-15 Macuga; Henry J. Elevator safety system incorporating false pit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129678A1 (en) * 1983-05-25 1985-01-02 G.M.V. SERVICE S.r.l. Automatic device for lifts or goods-lifts without safety lift-shafts
SE456417B (en) * 1984-03-20 1988-10-03 Sven Agren Lift shaft with cage
CH667638A5 (en) * 1985-09-27 1988-10-31 Inventio Ag Safety device for maintenance space under lift cabin - has prop swung outwards under cabin after carrier arm has been positioned
JPH0318575A (en) * 1989-06-16 1991-01-28 Mitsubishi Electric Corp Operating circuit for elevator
NL9100059A (en) * 1991-01-11 1992-08-03 Otis Liften B V Lift-cage position locking mechanism - has gravity operated locks providing lower and upper safety zones within a lift shaft
US5727657A (en) * 1995-01-31 1998-03-17 Inventio Ag Apparatus for blocking elevator car travel
JPH0958942A (en) * 1995-08-22 1997-03-04 Mitsubishi Denki Bill Techno Service Kk Space keeping device of elevator
US5806633A (en) * 1995-12-22 1998-09-15 Macuga; Henry J. Elevator safety system incorporating false pit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 138 (M - 1100) 8 April 1991 (1991-04-08) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 07 31 July 1997 (1997-07-31) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077243B2 (en) 2003-05-21 2006-07-18 Inventio Ag Elevator installation with a buffer for creating a zone of protection in an elevator installation and a method of creating a zone of protection
WO2008056026A1 (en) * 2006-11-10 2008-05-15 Kone Corporation Traction sheave elevator without counterweight
EA014743B1 (en) * 2006-11-10 2011-02-28 Коне Корпорейшн Traction sheave elevator without counterweight
EP2050703A3 (en) * 2007-10-16 2009-07-22 Exclusive Lift GmbH Lift assembly for people and/or loads with at least one lift cabin
EP2325129A1 (en) * 2007-10-16 2011-05-25 H. Henseler AG Lift assembly for people and/or loads with at least one lift cabin
EP2325128B1 (en) 2007-10-16 2017-08-23 Inventio AG Lift assembly for people and/or loads with at least one lift cabin
WO2013025185A1 (en) * 2011-08-12 2013-02-21 Otis Elevator Company Low pit access detection and monitoring
US11078043B2 (en) 2017-05-12 2021-08-03 Otis Elevator Company Elevator overrun systems

Also Published As

Publication number Publication date
CN1481332A (en) 2004-03-10
FI20002851A0 (en) 2000-12-22
EP1343712B1 (en) 2014-05-21
FI112640B (en) 2003-12-31
HK1059614A1 (en) 2004-07-09
FI20002851A (en) 2002-06-23
CN1224570C (en) 2005-10-26
EP1343712A1 (en) 2003-09-17

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