EP1724225B1 - Dispositif de freinage d urgence d un elevateur - Google Patents

Dispositif de freinage d urgence d un elevateur Download PDF

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Publication number
EP1724225B1
EP1724225B1 EP04713643A EP04713643A EP1724225B1 EP 1724225 B1 EP1724225 B1 EP 1724225B1 EP 04713643 A EP04713643 A EP 04713643A EP 04713643 A EP04713643 A EP 04713643A EP 1724225 B1 EP1724225 B1 EP 1724225B1
Authority
EP
European Patent Office
Prior art keywords
braking
drive sheave
brake
sheave
brake shoe
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 - Lifetime
Application number
EP04713643A
Other languages
German (de)
English (en)
Other versions
EP1724225A4 (fr
EP1724225A1 (fr
Inventor
Kazumasa Mitsubishi Denki Kabushiki Kaisha ITO
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 EP1724225A1 publication Critical patent/EP1724225A1/fr
Publication of EP1724225A4 publication Critical patent/EP1724225A4/fr
Application granted granted Critical
Publication of EP1724225B1 publication Critical patent/EP1724225B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
    • B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/30—Operating devices electrical

Definitions

  • the present invention relates to an emergency brake device for an elevator which brakes rotation of a drive sheave to stop an upward travel of a car.
  • a brake pulley located adjacent to an axial end portion of a drive sheave is rotated integrally with the drive sheave.
  • the brake pulley is provided with a braking surface to be joined to the axial end portion of the drive sheave. Further, the brake pulley is pressed against the drive sheave by means of a brake spring.
  • a brake bolt engages with the brake pulley to stop the rotation of the brake pulley.
  • braking is applied to the drive sheave due to the friction force between the drive sheave and the braking surface.
  • the present invention has been made with a view to solving the problems mentioned above, and therefore it is an object of the invention to provide an emergency brake device for an elevator which is capable of stopping the travel of a car more quickly.
  • an emergency brake device for an elevator which brakes rotation of a drive sheave, around which a main rope for suspending a car and a counterweight are wound, to stop upward travel of the car, comprising: a braking member having an attachment member and a brake shoe, the attachment member being capable of rocking motion about a rotation shaft of a deflector sheave around which the main rope is wound on a counterweight side with respect to the drive sheave, the brake shoe being provided to the attachment member and brought into and out of contact with a deflector sheave side outer peripheral surface of the drive sheave due to the rocking motion of the attachment member; and braking/releasing means connected to the braking member, for holding the brake shoe in a separated position separated from the drive sheave upon brake release and for causing the braking member to rock into abutment with the drive sheave upon braking.
  • Fig. 1 is a schematic structural view showing an elevator apparatus according to an embodiment of the present invention.
  • a pair of car guide rails 2 and a pair of counterweight guide rails 3 are arranged in a hoistway 1.
  • a car 4 is raised and lowered in the hoistway 1 while being guided by the car guide rails 2.
  • a counterweight 5 is raised and lowered in the hoistway 1 while being guided by the counterweight guide rails 3.
  • a machine room 6 is provided at a top of the hoistway 1.
  • a machine base 7 is arranged in the machine room 6.
  • a drive device (hoisting machine) 8 and a deflector sheave 9 are supported to the machine base 7.
  • the drive sheave 8 has a drive sheave main body 8a including a motor and a brake, and a drive sheave (traction sheave) 8b that is rotated by the motor of the drive device main body 8a.
  • a plurality of main ropes 10 (only one of which is shown in Fig. 1 ) are wound around the drive sheave 8b and the deflector sheave 9.
  • Each main rope 10 has a first end portion 10a to which the car 4 is connected, and a second end portion 10b to which the counterweight 5 is connected. That is, in the hoistway 1, the car 4 and the counterweight 5 are suspended according to a 1:1 roping system and raised and lowered by the drive force of the drive device 8.
  • a rotation shaft 9a of the deflector sheave 9 is parallel and horizontal to a rotation shaft 8c of the drive sheave 8b.
  • the rotation shafts 8c, 9a are stationary shafts, with the drive sheave 8b and the deflector sheave 9 being rotatable with respect to the drive shafts 8c, 9a, respectively.
  • the main rope 10 is wound around the deflector sheave 9 at a position on the counterweight 5 side with respect to the drive device 8.
  • the deflector sheave 9 leads the main rope 10 from the drive sheave 8b to the deflector sheave 9.
  • an emergency brake device 11 for braking the rotation of the drive sheave 8b in an emergency situation to stop the car 4.
  • the emergency stop device 11 is provided outside the drive sheave 8 separately from a brake arranged inside the drive device main body 8a. Further, the emergencybrake device 11 is electrically connected to a control device (control panel) 12 for controlling the drive device 8. A signal from a speed detector 13, which detects the speed of the car 4, is inputted to the control device 12.
  • the emergency brake device 11 When the ascent speed of the car 4 exceeds a preset speed, the emergency brake device 11 is actuated by the control device 12, whereby braking is applied to the rotation of the drive sheave 8b to thereby stop the car 4. It should be noted that when the descent speed of the car 4 exceeds a preset speed, a braking command signal is transmitted from the control device 2 to an emergency stop device (not shown) mounted in the car 4, thereby actuating the emergency stop device to stop the car 4.
  • Fig. 2 is a side view showing, partly in section, the construction of the emergency brake device 11 of Fig. 1
  • Fig. 3 is a side view showing how braking is effected with the emergency brake device 11 of Fig. 2
  • Fig. 4 is a sectional view taken along the line IV-IV of Fig. 2
  • Fig. 5 is a sectional view taken along the line V-V of Fig. 3 .
  • an attachment member (attachment arm) 15 is attached to the rotation shaft 9a of the deflector sheave 9.
  • the attachment member 15 is capable of rocking with respect to the rotation shaft 9a about the rotation shaft 9a.
  • a brake shoe 17 is attached to the distal end portion of the attachment member 15 through a plurality of brake springs 16.
  • the brake shoe 17 is brought into and out of contact with the deflector sheave 9 side (counterweight 5 side) outer peripheral surface of the drive sheave 8b due to the rocking motion of the attachment member 15. That is, the brake shoe 17 is displaceable between a separated position ( Fig. 2 ) where it is separated from the drive sheave 8b and a braking position ( Fig. 3 ) where it is in abutment with the outer peripheral surface of the drive sheave 8b.
  • Formed in the surface of the brake shoe 17 is a concave portion curved at the same curvature as the outer peripheral surface of the drive sheave 8b.
  • the attachment member 15, the brake springs 16, and the brake shoe 17 constitute a braking member 18.
  • a support member 19 is fixed to the rotation shaft 9a.
  • the support member 19 is held in its horizontal position irrespective of the rotation of the deflector sheave 9 or the rocking motion of the braking member 18.
  • Supported by the support member 18 is an electromagnetic actuator 20 serving as braking/releasing means.
  • the electromagnetic actuator 20 has a plunger 21 connected to the brake shoe 17 and a solenoid coil 22 for driving the plunger 21.
  • the solenoid coil 22 serves to hold the brake shoe 17 in the separated position through the intermediation of the plunger 21.
  • the solenoid coil 22 is deenergized, whereby the braking member 18 falls due to its own weight so the brake shoe 17 is brought into abutment with the drive sheave 8b.
  • the electromagnetic actuator 20 has a built-in auxiliary spring 25 urging the plunger 21 downward so that the plunger 21 is lowered with greater reliability at the time of braking.
  • An engaging member 24 is fixed to the brake shoe 17.
  • the engaging member 24 is provided with an elongated hole 24a.
  • the plunger 21 is provided with an engaging protrusion inserted in the elongated hole 24a.
  • the plunger 21 is connected to the brake shoe 17 through the intermediation of the engaging member 24.
  • Respectively provided in the outer peripheral surface of the drive sheave 8b and the outer peripheral surface of the deflector sheave 9 are a plurality of rope grooves 8d, 9b ( Figs. 4 and 5 ) into which the main ropes 10 are inserted.
  • the solenoid coil 22 is energized so that the plunger 21 is pushed up by the electromagnetic force of the solenoid coil 22, whereby the brake shoe 17 is separated from the outer peripheral surface of the drive sheave 8b. Further, the travelling speed of the car 4 is detected by the speed detector 13 and constantly monitored by the control device 12.
  • the brake shoe 17 is further displaced in the rotation direction of the drive sheave 8b after abutting with the outer peripheral surface of the drive sheave 8b, because the drive sheave 8b is rotating clockwise as seen in Figs. 2 and 3 . That is, the braking member 18 functions like a wedge so as to be wedged between the rotation shaft 9a and the drive sheave 8b. At this time, the brake spring 16 is compressed between the attachment member 15 and the brake shoe 17.
  • the brake shoe 17 is displaced until equilibrium is reached between the spring force of the brake spring 16 and the friction braking force generated by the brake shoe 17. That is, as the brake spring 16 is compressed, a force for pressing the brake shoe 17 against the drive sheave 8b is generated, whereby a friction braking force is generated between the brake shoe 17 and the drive sheave 8b.
  • the ascending car 4 can be decelerated with a predetermined braking force to be brought to a stop more quickly, irrespective of the speed of the car 4.
  • the attachment member 15 is capable of rocking about the rotation shaft 9a, thus allowing effective utilization of the space between the drive sheave 8b and the deflector sheave 9 in placing the emergency brake device 11. Furthermore, the casing of the deflector sheave 9 also serves as the casing of the emergency brake device 11 and thus it is unnecessary to provide a separate casing dedicated to the emergency brake device 11, thereby achieving a reduction in cost.
  • the brake shoe 17 is held in the separated position by energizing the solenoid coil 22, and the brake shoe 17 is brought into abutment with the drive sheave 8b by deenergizing the solenoid coil 22, whereby the rocking motion of the braking member 18 can be effected immediately in response to a command from the control device 12.
  • the braking member 18 rocks due to its own weight and the brake shoe 17 comes into abutment with the drive sheave 8b, thereby making it possible to bring the brake shoe 17 into abutment with the drive sheave 8b with greater reliability by means of a simple structure.
  • the emergency brake device 11 While in the above-described example the emergency brake device 11 is operated when the ascent speed of the car 4 reaches an abnormal speed, the emergency brake device 11 may also be operated when the car 4 is at rest at a landing floor during normal operation, thereby preventing the car 4 from ascending abnormally while passengers are getting into or out of the car 4.
  • the electromagnetic actuator 20 is exemplified as the braking/releasing means
  • the braking/releasing means is not limited to this.
  • an air actuator for holding the brake shoe in the separated position by means of air pressure or the like can also be employed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Braking Arrangements (AREA)

Claims (4)

  1. Dispositif de frein de secours pour un ascenseur qui freine la rotation d'une poulie d'entraînement (8b), autour de laquelle est enroulé un câble principal (10) pour suspendre une cabine (4) et un contrepoids (5), pour arrêter le déplacement vers le haut de la cabine (4), comprenant :
    un élément de freinage (18) ayant un élément d'attachement (15) et une mâchoire de frein (17), l'élément d'attachement (15) étant susceptible d'un mouvement de balancement autour d'un arbre de rotation d'une poulie formant déflecteur (9) autour de laquelle est enroulé le câble principal (10) sur un côté contrepoids (5) par rapport à la poulie d'entraînement (8b), la mâchoire de frein (17) étant disposée sur l'élément d'attachement (15) et amenée en et hors de contact avec une surface périphérique extérieure, côté poulie formant déflecteur (9), de la poulie d'entraînement (8b) en raison du mouvement de balancement de l'élément d'attachement (15) ; et
    un moyen de freinage / libération (20) relié à l'élément de freinage (18), pour maintenir la mâchoire de frein (17) dans une position séparée de la poulie d'entraînement (8b) lors de la libération de frein et pour amener l'élément de freinage (18) à se balancer en butée contre la poulie d'entraînement (8b) lors du freinage.
  2. Dispositif de frein de secours pour un ascenseur selon la revendication 1, dans lequel l'élément de freinage (18) a en outre un ressort de frein (16) disposé entre l'élément d'attachement (15) et la mâchoire de frein (17).
  3. Dispositif de frein de secours pour un ascenseur selon la revendication 1, dans lequel le moyen de freinage / libération (20) a un piston (21) relié à l'élément de freinage (18), et une bobine de solénoïde (22) qui, quand elle est excitée, amène la mâchoire de frein (17) à être maintenue dans la position séparée par l'intermédiaire du piston (21).
  4. Dispositif de frein de secours pour un ascenseur selon la revendication 3, dans lequel la désexcitation de la bobine de solénoïde (22) amène l'élément de freinage (18) à se balancer en raison de son propre poids pour amener la mâchoire de frein (17) en butée contre la poulie d'entraînement (8b).
EP04713643A 2004-02-23 2004-02-23 Dispositif de freinage d urgence d un elevateur Expired - Lifetime EP1724225B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/002056 WO2005080248A1 (fr) 2004-02-23 2004-02-23 Dispositif de freinage d'urgence d'un elevateur

Publications (3)

Publication Number Publication Date
EP1724225A1 EP1724225A1 (fr) 2006-11-22
EP1724225A4 EP1724225A4 (fr) 2012-02-22
EP1724225B1 true EP1724225B1 (fr) 2013-01-09

Family

ID=34878955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04713643A Expired - Lifetime EP1724225B1 (fr) 2004-02-23 2004-02-23 Dispositif de freinage d urgence d un elevateur

Country Status (4)

Country Link
EP (1) EP1724225B1 (fr)
JP (1) JP4292201B2 (fr)
CN (1) CN100447068C (fr)
WO (1) WO2005080248A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7656641B2 (en) * 2006-12-21 2010-02-02 General Electric Company Apparatus and method for controlling a solenoid
EP2135832B1 (fr) * 2008-06-19 2012-01-11 Inventio AG Frein d'ascenseur et une installation d'ascenseur dotée d'un frein d'ascenseur
WO2011004468A1 (fr) * 2009-07-08 2011-01-13 三菱電機株式会社 Dispositif de frein à tambour à action directe pour ascenseur
CN103062256B (zh) * 2013-02-02 2015-11-18 江苏武东机械有限公司 锥形盘式制动器
CN103112795B (zh) * 2013-02-02 2015-10-07 江苏武东机械有限公司 自锁外缘制动器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190917998A (en) * 1909-08-04 1910-08-04 Paul Taylor Kenny Safety Indicator and Control for Electric Lifts.
US3795290A (en) * 1970-12-09 1974-03-05 Hitachi Ltd Drum, rim grip braking device
JP2763244B2 (ja) * 1993-01-07 1998-06-11 三菱電機株式会社 エレベーター用制動装置
WO2002053485A1 (fr) * 2000-12-28 2002-07-11 Mitsubishi Denki Kabushiki Kaisha Dispositif de frein d'urgence pour ascenseur
KR100614145B1 (ko) * 2002-04-19 2006-08-21 미쓰비시덴키 가부시키가이샤 엘리베이터용 비상브레이크장치

Also Published As

Publication number Publication date
EP1724225A4 (fr) 2012-02-22
WO2005080248A1 (fr) 2005-09-01
CN1747886A (zh) 2006-03-15
JPWO2005080248A1 (ja) 2007-08-30
CN100447068C (zh) 2008-12-31
JP4292201B2 (ja) 2009-07-08
EP1724225A1 (fr) 2006-11-22

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