EP1577248B1 - Aufzugsvorrichtung und geschwindigkeitsanpassungsseil - Google Patents

Aufzugsvorrichtung und geschwindigkeitsanpassungsseil Download PDF

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Publication number
EP1577248B1
EP1577248B1 EP02808325A EP02808325A EP1577248B1 EP 1577248 B1 EP1577248 B1 EP 1577248B1 EP 02808325 A EP02808325 A EP 02808325A EP 02808325 A EP02808325 A EP 02808325A EP 1577248 B1 EP1577248 B1 EP 1577248B1
Authority
EP
European Patent Office
Prior art keywords
car
speed governor
speed
governor rope
sheave
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
EP02808325A
Other languages
English (en)
French (fr)
Other versions
EP1577248A4 (de
EP1577248A1 (de
Inventor
Mineo Mitsubishi Denki K.K. OKADA
Kenichi Mitsubishi Denki K.K. OKAMOTO
Takuo Mitsubishi Denki K.K. KUGIYA
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 EP1577248A1 publication Critical patent/EP1577248A1/de
Publication of EP1577248A4 publication Critical patent/EP1577248A4/de
Application granted granted Critical
Publication of EP1577248B1 publication Critical patent/EP1577248B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B66B5/02—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
    • 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

Definitions

  • the present invention relates to an elevator system and a speed governor rope. More particularly, it relates to an elevator system provided with an emergency stopping device and a speed governor, and a speed governor rope used in this system.
  • an elevator system is provided with various devices such as a speed governor, emergency stopping device, and shock absorber to ensure safety.
  • a speed governor e.g., a speed governor, emergency stopping device, and shock absorber to ensure safety.
  • shock absorber e.g., a shock absorber to ensure safety.
  • the speed governor detects this fact to shut off the electric power for a hoist motor.
  • a hoist brake operates to stop the rotation of hoist, by which the upward and downward movement of car is stopped.
  • the deceleration caused by the emergency stopping device is set so that the average deceleration of car is within 1 G.
  • G designates gravitational acceleration, being about 9.8 m/s 2 .
  • the shock absorber is provided at the lower part of an elevator shaft.
  • the shock absorber alleviates a shock when the car collides with the bottom of elevator shaft.
  • the shock absorber is set, like the emergency stopping device, so that the average deceleration of car is within 1 G.
  • the speed at which the car collides with the shock absorber may become the second overspeed V t at the maximum.
  • a shock absorbing operation distance SB until the car is stopped by the shock absorber is set so as to have the same length as a stopping distance SA at which the car is stopped by the emergency stopping device.
  • the shock absorber itself becomes undesirably very long.
  • the shock absorbing operation distance SB of shock absorber sometimes exceeds 10 m.
  • the total height of shock absorber exceeds 20 m.
  • shock absorber itself increases the manufacturing cost of shock absorber, and hence increases the building cost of elevator system.
  • a space for installing a tall shock absorber having such a height must be secured at a part lower than the lowest floor of the elevator system. Further, if the car collides with the shock absorber at the speed V t , the car goes downward further from the lowest floor by the shock absorbing operation distance SB. At this time, a balancing weight goes upward further from the highest floor by the shock absorbing operation distance SB. Therefore, at the upper part of the elevator shaft, a space corresponding to the shock absorbing operation distance SB must be provided as a space for allowing the rise of balancing weight. That is to say, in the elevator system, a space corresponding to the height of shock absorber must be provided at the lower part of elevator shaft, and a space corresponding to the shock absorbing operation distance SB must be provided at the upper part thereof.
  • an elevator system can be thought in which the movement speed of car is controlled so as to be decreased compulsorily at the lower part of elevator shaft.
  • the maximum speed at the time when the car collides with the shock absorber can be decreased, so that the necessary shock absorbing operation distance SB of shock absorber can be shortened.
  • the shock absorbing operation distance SB is preferably secured considering a case where the car collides with the shock absorber at the second overspeed V t .
  • the present invention proposes an elevator system that is improved so as to solve the above problems, to shorten a shock absorber while a necessary shock absorbing operation distance is secured, and to decrease a necessary space in the upper and lower portions in an elevator shaft.
  • an elevator system in accordance with the present invention includes a car moving up and down in an elevator shaft by being guided by a guide rail erected in the elevator shaft; a speed governor for stopping the movement of the car according to the movement speed of the car; a speed governor rope which is formed into an endless shape and is wound on the speed governor; and an emergency stopping device which is provided on the car and is connected to one location of the speed governor rope to stop the movement of the car according to the operation of the speed governor rope.
  • the speed governor rope is formed so as to include a small-diameter region and a large-diameter region, and thereby the operation speed of the speed governor changes according to the position of the car.
  • the movement speed of the car can be adjusted as necessary when the movement of the car is stopped or the emergency stopping device is operated. Therefore, the shock absorbing operation distance of the shock absorber can be shortened, and hence the necessary space at the upper and lower parts of the elevator system can be decreased.
  • Figure 1 is a schematic view for illustrating an elevator system 100 in accordance with an embodiment of the present invention.
  • the elevator system 100 is constructed so as to include an elevator shaft 2 and a machine room 4.
  • the elevator shaft 2 is provided with stages 2A 1 , 2A 2 and 2A 3 arranged in that order from the highest part 2a of elevator shaft, and is provided with stages 2B 1 , 2B 2 and 2B 3 arranged in that order from the lowest part 2b thereof.
  • a car 6 and a balancing weight 8 are hung down by a rope 10. Also, in the elevator shaft 2, two guide rails 12 are erected. Each of two side walls, which are opposed to each other, of the car 6 are in contact with the guide rails 2. The car 6 moves up and down in the elevator shaft 2 by being guided by the guide rails 12.
  • a hoist 14 is provided in the machine room 4.
  • the rope 10 is wound on the hoist 14.
  • the hoist 14 moves the rope 10 by means of the rotation thereof, by which the car 6 and the balancing weight 8 fixed to the rope 10 are moved up and down.
  • a control panel 16 is provided in the machine room 4. The control panel 16 is connected to the hoist 14 to electrically control the hoist 14.
  • a speed governor 22 is provided in the machine room 4.
  • a tension pulley 24 is provided on the floor of the elevator shaft 2.
  • An endless speed governor rope 26, which is formed into a loop shape, is set around the speed governor 22 and the tension pulley 24. That is, the speed governor rope 26 is provided on the speed governor 22 and the tension pulley 24 under tension.
  • an emergency stopping device 28 is provided on the bottom of the car 6. The emergency stopping device 28 is connected to one location of the speed governor rope 26.
  • a shock absorber 30 is provided under the car 6.
  • Figure 2 is a schematic view for illustrating the speed governor 22 in accordance with the embodiment of the present invention.
  • Figure 3 is a schematic sectional view of the speed governor 22, taken along the line A-A' of Figure 2 .
  • Figure 4 is a schematic view for illustrating a state in which the rotation of the speed governor 22 is stopped, the view corresponding to Figure 2 .
  • see-through portions are indicated by dotted lines.
  • the speed governor 22 is constructed so that a sheave 32 is rotatably supported on a sheave base 36 by a sheave shaft 34 provided at the center of the sheave 32.
  • a pair of flyweights 38a and 38b are arranged at positions symmetrical with respect to the sheave shaft 34, and they each are installed to the sheave 32 with a pin 40 so as to be rotatable around the pin 40.
  • the flyweights 38a and 38b are connected to each other by a link 42. Further, on one flyweight 38a, an actuating claw 46 is provided.
  • the sheave base 36 is provided with a car stopping switch 48, and the car stopping switch 48 is provided with a switch lever 50.
  • the switch lever 50 is arranged at a position at which it is operated by the actuating claw 46.
  • a balancing spring 52 is fixed at an end of the flyweight 38a, which is on the opposite side to the position at which the actuating claw 46 is provided.
  • the other end of the balancing spring 52 is fixed to the sheave 32.
  • a latch 54 is provided near a portion of the flyweight 38a where the balancing spring 52 is fixed.
  • the sheave base 36 is provided with a ratchet 56 that engages with the latch 54 as necessary.
  • the balancing spring 52 is set so that the elastic force thereof acts in the direction opposed to the centrifugal force applied to the flyweight 38a. Further, the elastic force of the balancing spring 52 is adjusted so that when the angular velocity of rotation of the sheave 32 reaches ⁇ s , the actuating claw 46 of the flyweight 38a pushes the switch lever 50, and when the angular velocity thereof reaches ⁇ t , the latch 54 engages with the ratchet 56.
  • Figure 5 is a schematic view for illustrating the speed governor rope 26.
  • Figure 5(a) is a front view
  • Figures 5(b) and 5(c) are sectional views taken along the lines B-B' and C-C' of Figure 5(a) , respectively.
  • the speed governor rope 26 is formed so as to include a small-diameter region 62, in which the rope diameter is small, and a large-diameter region 64.
  • the small-diameter region 62 is formed by providing a core 66 in the center and by arranging a total of eight strands 68 in one layer around the core 66 and twisting them.
  • the core 66 is formed of fibers such as hemp, and is impregnated with oil (grease) etc. to prevent the rope from rusting.
  • the strand 68 is formed by twisting thin steel wires called element wires.
  • the large-diameter region 64 is a region connected to the small-diameter region 62 as it is.
  • the large-diameter region 64 is formed by arranging strands 68 in two layers around the small-diameter region 62 and by twisting them.
  • the speed governor rope 26 is formed in an endless shape by connecting the ends thereof to each other into a loop form. The speed governor rope 26 moves in synchronism with the upward and downward movement of the car 6.
  • the large-diameter region 64 of the speed governor rope 26 is wound on the sheave 32 of the speed governor 22, and when the car 6 is located below the speed governor rope diameter change point C, the small-diameter region 62 is wound thereon.
  • Figure 6 is a schematic view for illustrating the emergency stopping device 28.
  • the emergency stopping device 28 is provided on the bottom of the car 6.
  • the emergency stopping device 28 includes a shaft support 72, a lever 74 arranged so as to be rotatable with respect to the shaft support 72, and a brake shoe 78 provided so as to be opposed to the guide rail 12.
  • a part of the lever 74 is connected to one location of the speed governor rope 26 so as to be rotated in association with the movement of the speed governor rope 26 as necessary.
  • the hoist 14 is controlled by the control panel 16. When a current flows in the hoist 14, the hoist 14 begins to rotate, and hence the rope 10 moves. Thereby, the car 6 and the balancing weight 8 are moved up or down in the elevator shaft 2.
  • Figure 7 is a graph showing the movement speed of the car 6. As shown in Figure 7 , the control is carried out so that when normal operation is performed and the car 6 does not stop at a midway floor, the car 6 begins to decelerate at point A near the stage 2A 3 , which is the third stage from the upper side, and at point B near the stage 2B 3 , which is the third stage from the lower side, and when the bottom of the car 6 comes to the stage 2A 1 of the highest floor or the stage 2B 1 of the lowest floor, the car 6 is stopped.
  • the flyweights 38a and 38b receive a centrifugal force proportional to the angular velocity of the sheave 32.
  • the flyweights 38a and 38b are in a state of being substantially fixed to the sheave 32 of the speed governor 22 because the elastic force of the balancing spring 52 is adjusted so as to be higher than the centrifugal force.
  • the angular velocity of the sheave 32 increases. Along with this, the centrifugal force applied to the flyweights 38a and 38b increases, so that the flyweights 38a and 38b move outward gradually with the pin 40 being the axis of rotation against the elastic force of the balancing weight 52.
  • the actuating claw 46 provided at one end of the flyweight 38a hits the switch lever 50, so that the switch lever 50 is pushed.
  • the car stopping switch 48 cuts off the current of the hoist 14. Thereby, the brake of the hoist 14 is operated to stop the rotation of the hoist 14, and hence the movement of the car 6 is stopped. Also, synchronously, the movement of the speed governor rope 26 is stopped, and the rotation of the sheave 32 of the speed governor 22 is also stopped.
  • V is the movement speed of the car 6, i.e., the movement speed of the speed governor rope 26, and R is the distance from the center of the sheave 32 to the center of the speed governor rope 26.
  • the distance from the center of the sheave 32 to the center of the speed governor rope 26 in the case where the small-diameter region 62 of the speed governor rope 26 is wound on the sheave is taken as R 1
  • the distance from the center of the sheave 32 to the center of the speed governor rope 26 in the case where the large-diameter region 64 thereof is wound on the sheave 32 is taken as R 2 .
  • the angular velocity of the sheave 32 at the time when the power for the hoist 14 is shut off has a fixed value that is adjusted and determined by the balancing spring 52 of the speed governor 22 etc. and refers to as ⁇ s .
  • Equation (2) taking the movement speed of the car 6 corresponding to the angular velocity ⁇ s in the case where the car 6 is located below the speed governor rope diameter change point C, that is, where the small-diameter region 62 is wound on the sheave 32 as V s1 and taking the movement speed of the car 6 corresponding to the angular velocity ⁇ s in the case where the car 6 is located above the speed governor rope diameter change point C, that is, where the large-diameter region 64 is wound on the sheave 32 as V s2 , Equation (2) can be obtained from Equation (1).
  • V s1 V s ⁇ 2 R 1 / R 2
  • Equation (4) can be obtained from Equation (1).
  • V t1 V t ⁇ 2 R 1 / R 2
  • R 1 is the distance in the case where the small-diameter region 62 is wound on the sheave 32
  • R 2 is the distance in the case where the large-diameter region is wound on the sheave 32. Therefore, the relationship expressed by Equation (6) holds.
  • V s1 and V t1 in the case where the small-diameter region 62 is wound are lower than V s2 and V t2 in the case where the large-diameter region 64 is wound. That is to say, when the car 6 is located below the speed governor rope diameter change point C, comparing with the case where the car 6 is located above the speed governor rope diameter change point C, the shutoff of power for the hoist 14 due to the speed governor 22 and the operation of the emergency stopping device 28 due to the speed governor 22 are carried out at a stage at which the movement speed of the car 6 is low.
  • the brake of the hoist 14 or the emergency stopping device 28 can be operated at a relatively early stage, and hence the collision of the car 6 with the shock absorber 30 can be restrained. Also, even when the downward movement speed of the car 6 does not reach a speed at which the emergency stopping device operates even if the car 6 reaches the lowest floor and when the emergency stopping device 28 does not operate until the car 6 reaches the lowest floor, the speed at which the car 6 collides with the shock absorber is V t1 at the maximum.
  • the speed governor rope diameter change point C is determined as described below.
  • L V t ⁇ 2 2 - V t ⁇ 1 2 / 2 ⁇ G
  • G is deceleration due to the emergency stopping device 28, which is about 9.8 m/s 2 , being the same value as the gravitational acceleration.
  • the shock absorber 30 can be one corresponding to the lower speed V t1 , not corresponding to the speed V t2 , so that a shock absorbing operation distance SB of the shock absorber 30 can be shortened.
  • the shock absorbing operation distance SB of the shock absorber 30 can be shortened without especially adding an electrical control mechanism. Therefore, the shock absorber 30 can be shortened, and hence a space necessary for installing the shock absorber 30 at the lowest part 2b of the elevator system can be decreased. Also, since the shock absorbing operation distance SB can be shortened, a space at the highest part 2a for the rise of the balancing weight 8 can be decreased. Therefore, the elevator system can be made small in size.
  • the emergency stopping device 28 can be operated when the speed of the car 6 is relatively low, even if the shock absorbing operation distance SB of the shock absorber 30 is short, a trouble such as a failure of the hoist 14 or breakage of the rope can be overcome properly.
  • the shape of the speed governor 22 is not limited to one explained in the embodiment.
  • the shape of the emergency stopping device 28 is not limited to one explained in the embodiment if the emergency stopping device 28 can be operated in association with the speed governor rope.
  • the deceleration due to the emergency stopping device 28 and the shock absorber 30 is 1 G in this embodiment, in the present invention, the deceleration is not limited to this value if safety within the car 6 can be ensured.
  • the small-diameter region 62 of the speed governor rope 26 is formed by twisting a total of eight strands 68 in one layer, and the large-diameter region thereof is formed by twisting the strands 68 in three layers.
  • the speed governor rope is not limited to this.
  • the speed governor rope may have a difference in diameter between the small-diameter region 62 and the large-diameter region 64 considering the necessary strength, the width of a portion in which the rope passes on the sheave 32 of the speed governor 22, the space for installing the shock absorber, and the like.
  • a position near the termination corresponds, for example, to a position below the speed governor rope diameter change point C in this embodiment.
  • the operation speed of the speed governor means the speed of the car 6 at the time when the speed governor shuts off the power for the hoist or operates the emergency stopping device, and corresponds, for example, V s1 , V s2 or V t1 , V t2 in this embodiment.
  • the speed governor rope is formed by changing the cross-sectional shape thereof, and thereby the operation speed of the speed governor is changed according to the position of the car.
  • the movement speed of the car in the case where the movement of the car is stopped or the emergency stopping device is operated as necessary can be adjusted. Therefore, the shock absorbing operation distance of the shock absorber can be shortened, and hence the necessary space at the upper and lower parts of the elevator system can be decreased.
  • the present invention is useful as the elevator system.

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

Claims (4)

  1. Aufzugssystem (100) mit:
    einer Kabine (6), die sich in einem Aufzugsschacht (2) nach oben und nach unten bewegt, wobei sie durch eine Führungsschiene (12) geführt wird, die in dem Aufzugsschacht (2) montiert ist,
    einem Geschwindigkeitsregler (22) zum Anhalten der Bewegung der Kabine (6) gemäß der Bewegungsgeschwindigkeit der Kabine (6),
    einem Geschwindigkeitsreglerseil (26), das in einer endlosen Form ausgebildet ist und um den Geschwindigkeitsregler (22) gewickelt ist und
    einer Notanhalteeinrichtung (28), die an der Kabine (6) vorgesehen ist und mit einer Stelle des Geschwindigkeitsreglerseils (26) verbunden ist, um die Bewegung der Kabine (6) gemäß der Betätigung des Geschwindigkeitsreglerseils (26) anzuhalten,
    dadurch gekennzeichnet, dass
    das Geschwindigkeitsreglerseil (26) so ausgebildet ist, dass es einen Bereich (62) mit einem kleinen Durchmesser und einen Bereich (64) mit einem großen Durchmesser aufweist, wodurch sich die Betätigungsgeschwindigkeit des Geschwindigkeitsreglers (22) gemäß der Position der Kabine (6) verändert.
  2. Aufzugssystem (100) nach Anspruch 1, bei dem sich das Geschwindigkeitsreglerseil (26) synchron mit der Bewegung der Kabine (6) bewegt und
    bei dem, wenn die Kabine (6) an einer Position in der Nähe des Endes des Aufzugsschachts (2) angeordnet ist, ein Abschnitt des Bereichs (62) mit einem kleinen Durchmesser des Geschwindigkeitsreglerseils (26) um den Geschwindigkeitsregler (22) gewickelt ist.
  3. Aufzugssystem (100) nach Anspruch 1 oder 2, bei dem das Geschwindigkeitsreglerseil (26) eine kreisförmige Querschnittsform aufweist, deren Durchmesser sich verändert.
  4. Aufzugssystem (100) nach Anspruch 1, bei dem das Geschwindigkeitsreglerseil (26) einen Abschnitt, der in einer Schicht durch mehrere Stränge (68) ausgebildet ist, und einen Abschnitt aufweist, der in zwei oder mehr Schichten durch mehrere Stränge (68) ausgebildet und mit dem einschichtigen Abschnitt verbunden ist.
EP02808325A 2002-12-25 2002-12-25 Aufzugsvorrichtung und geschwindigkeitsanpassungsseil Expired - Fee Related EP1577248B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/013515 WO2004058620A1 (ja) 2002-12-25 2002-12-25 エレベータ装置及び調速機ロープ

Publications (3)

Publication Number Publication Date
EP1577248A1 EP1577248A1 (de) 2005-09-21
EP1577248A4 EP1577248A4 (de) 2011-06-01
EP1577248B1 true EP1577248B1 (de) 2013-03-06

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Application Number Title Priority Date Filing Date
EP02808325A Expired - Fee Related EP1577248B1 (de) 2002-12-25 2002-12-25 Aufzugsvorrichtung und geschwindigkeitsanpassungsseil

Country Status (5)

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EP (1) EP1577248B1 (de)
JP (1) JPWO2004058620A1 (de)
KR (1) KR100627540B1 (de)
CN (1) CN100352753C (de)
WO (1) WO2004058620A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4842112B2 (ja) * 2006-12-06 2011-12-21 株式会社日立製作所 エレベーターの調速機ロープ振れ止め装置
JP5735504B2 (ja) 2009-07-20 2015-06-17 オーチス エレベータ カンパニーＯｔｉｓ Ｅｌｅｖａｔｏｒ Ｃｏｍｐａｎｙ エレベータの調速機
JP2017100865A (ja) * 2015-12-03 2017-06-08 東芝エレベータ株式会社 ガバナ装置及びこれを備えたエレベータ装置
KR101955788B1 (ko) * 2017-02-22 2019-03-08 현대엘리베이터주식회사 다단 가변속 엘리베이터

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2727876B2 (ja) * 1992-06-18 1998-03-18 三菱電機株式会社 エレベータ用調速機
FI95021C (fi) * 1993-06-08 1995-12-11 Kone Oy Menetelmä ja laitteisto hissin tarrauslaitteen laukaisemiseksi
JPH0867447A (ja) * 1994-08-30 1996-03-12 Mitsubishi Denki Bill Techno Service Kk エレベータの調速機
JP3954173B2 (ja) * 1997-10-21 2007-08-08 東芝Ｉｔコントロールシステム株式会社 ピット据付形調速機
JP2001354372A (ja) * 2000-06-14 2001-12-25 Mitsubishi Electric Corp エレベーター装置

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Publication number Publication date
CN100352753C (zh) 2007-12-05
KR100627540B1 (ko) 2006-09-21
JPWO2004058620A1 (ja) 2006-04-27
KR20050002832A (ko) 2005-01-10
CN1620400A (zh) 2005-05-25
EP1577248A4 (de) 2011-06-01
WO2004058620A1 (ja) 2004-07-15
EP1577248A1 (de) 2005-09-21

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