EP1790609B1 - Palan pour ascenseur - Google Patents

Palan pour ascenseur Download PDF

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Publication number
EP1790609B1
EP1790609B1 EP04771055.3A EP04771055A EP1790609B1 EP 1790609 B1 EP1790609 B1 EP 1790609B1 EP 04771055 A EP04771055 A EP 04771055A EP 1790609 B1 EP1790609 B1 EP 1790609B1
Authority
EP
European Patent Office
Prior art keywords
brake
side housing
winch
arms
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
EP04771055.3A
Other languages
German (de)
English (en)
Other versions
EP1790609A1 (fr
EP1790609A4 (fr
Inventor
Yasumasa Mitsubishi Electric Engineering Company Ltd. IIDA
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 EP1790609A1 publication Critical patent/EP1790609A1/fr
Publication of EP1790609A4 publication Critical patent/EP1790609A4/fr
Application granted granted Critical
Publication of EP1790609B1 publication Critical patent/EP1790609B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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 a winch for an elevator that serves to drive a rope to move a car in a vertical direction.
  • Another winch for an elevator is also known e.g. from EP-A-1394096 .
  • the present invention is intended to obviate the problems as referred to above, and has for its object to obtain a winch for an elevator in which a sheave can be directly maintained and checked, together with a brake device, by visual inspection from the same direction as that in which the brake device is maintained and checked, and there is no need to provide any space for maintenance and check that is protruded to a side opposite to a car in a wall area opposing to the sheave, while making it possible to do the maintenance and check operation of the sheave in an easy manner.
  • a winch includes: a motor side housing with a motor arranged therein; a brake side housing that is arranged in opposition to and fixedly attached to the motor side housing; a fixed shaft that penetrates through the brake side housing and the motor side housing and is fixedly secured thereto; a sheave that is rotatably mounted on the fixed shaft in the brake side housing; a brake drum that is mounted on the motor side housing so as to rotate together with the sheave; a pair of brake arms that have their one ends rotatably mounted on the brake side housing; brake shoes that are mounted on the brake arms, respectively, so as to be in sliding contact with braking surfaces, respectively, of the brake drum; brake springs that are arranged in the brake side housing between the pair of brake arms so that the pair of brake arms are urged in a direction away from each other; and an electromagnetic magnet that is arranged in the brake side housing between the other ends of the pair of brake arms so as to attract the other ends against resilient forces
  • Fig. 1 is a configuration view that illustrates a state in which a winch 3 according to a first embodiment of the present invention is installed to a hoistway 1.
  • the winch 3 is fixedly attached to a wall of the hoistway 1 through a beam 2.
  • a rope 5 is wrapped around a sheave 4 of the winch 3.
  • the rope 5 has one end connected with a car 7 through car side return wheels 6, and the other end connected with a balance weight 9 through weight side return wheels 8.
  • Fig. 2 is a front elevational view that shows the winch 3 of Fig. 1 .
  • Fig. 3 is a cross sectional arrow view when the winch 3 of Fig. 2 is cut away along line A - A.
  • a motor side housing 11 and a brake side housing 12 are arranged in opposition to each other and fixedly secured to each other.
  • a fixed shaft 10 is fixedly secured at its opposite ends to the central portions of the motor side housing 11 and the brake side housing 12, respectively.
  • the sheave 4 is rotatably mounted on this fixed shaft 10 through a bearing 13.
  • the sheave 4 having a plurality of grooves 15 formed along the rotational direction thereof is formed continuously with a concave-shaped brake drum 14 that extends in a diametral direction and protrudes in an axial direction.
  • the brake drum 14 has its outermost peripheral end face 20 arranged at a location nearer to the motor side housing 11 than to the grooves 15.
  • a plurality of permanent magnets 16 are fixedly attached at equal intervals to the outer peripheral surface of the brake drum 14 along the rotational direction of the sheave 4.
  • a stator 19 in opposition to the permanent magnets 16, the stator 19 being fixedly secured to the motor side housing 11.
  • the stator 19 is composed of an annular core 17 and a coil 18 with its conductor wound around the core 17.
  • the permanent magnets 16 and the stator 19 together constitute a motor.
  • Each of the brake arms 22 has its intermediate portion protruded toward the motor side housing 11 in a triangular shape, as shown in Fig. 5 .
  • a shoulder bolt 23 penetrates through the protruded portion of each brake arm, as shown in Fig. 2 , and a brake shoe 24, which can be placed into pressure contact with braking surfaces 25 formed on the inner side of the brake drum 14, is threaded to a tip end of each shoulder bolt 23.
  • a hemispherical concave portion 26 is formed in each brake shoe 24 at a side opposite to a corresponding braking surface 25.
  • a spherical washer 27 is arranged between the brake shoe 24 and a corresponding brake arm 22 in a manner rotatable with respect to the concave portion 26.
  • a coil spring 29 is arranged under compression between a head 28 of each shoulder bolt 23 and a corresponding brake arm 22.
  • Each brake shoe 24 is urged toward a corresponding brake arm 22 by means of the resilient force of a corresponding coil spring 29.
  • a pair of brake springs 30 are arranged fixed to the brake side housing 12 at locations right under the sheave 4. These brake springs 30 serve to urge the pair of brake arms 22 in a direction away from each other.
  • an electromagnetic magnet 31 is arranged fixed to the brake side housing 12 at a location right under the sheave 4.
  • a pair of L-shaped rope latches 32 are arranged fixed to the brake side housing 12, so that the rope 5 is prevented from disengaging from the grooves 15 in the sheave 4 by means of these rope latches 32.
  • the electromagnetic magnet 31 When the sheave 4 is driven to rotate, the electromagnetic magnet 31 is supplied with current thereby to generate an electromagnetic force, so that it attracts the tip ends of the respective brake arms 22 against the resilient forces of the brake springs 30, as shown in Fig. 2 . That is, the pair of brake arms 22 are caused to rotate about the corresponding support pins 21, respectively, and the brake shoes 24 fixed to the brake arms 22 are moved away from the braking surface 25 of the brake drum 14.
  • the brake shoes 24 are arranged away from the rotating surfaces of the brake arms 22 in a direction toward the motor side housing 11, as can be seen from Fig. 5 , so an offset or unbalanced load acts on the brake shoes 24, and hence the load might influence the braking surfaces 25 as it is.
  • the washers 27 with some play are interposed between the corresponding brake arms 22 and brake shoes 24, respectively, so that the offset load on the braking surfaces 25 of the brake shoes 24 is suppressed by the washers 27.
  • the pair of brake arms 22, the brake shoes 24, the brake springs 30 and the electromagnetic magnet 31, which together constitute the brake device are arranged at a side near the sheave, so the sheave 4 and the respective components constituting the brake device can be directly maintained and checked by visual inspection from the same direction, thus making it possible to improve a maintenance and check operation.
  • the winch 3 is fixedly attached to the wall surface of the hoistway 1 in such a manner that the sheave 4 faces to the side of the car 7 that moves up and down in the hoistway 1, so an operator can perform the maintenance and check operation in a wide space.
  • the winch 3 there is no need to take the trouble of providing a special space for maintenance and check that is protruded to a side opposite to the car 7 in a wall region opposing to the winch 3.
  • the washers 27 are slidable with respect to the corresponding hemispherical concave portions 26, the offset load applied to the braking surfaces 25 of the brake shoes 24 from the brake arms 22 is suppressed, so the braking performance becomes stabilized. Further, localized wear or abnormal wear of the brake shoes 24, which are in sliding contact with the braking surfaces 25, can be reduced, and at the same time the amount of wear of the braking surfaces 25 of the brake drum 14 can also be reduced.
  • the rope latches 32 are mounted on the brake side housing 12 to cover the grooves 15 in the sheave 4 so as to prevent the disengagement of the rope 5 from the grooves 15, when the maintenance and check of the sheave 4 and the respective components constituting the brake device are carried out, the gaps between the rope and the rope latches 32 can be checked directly from the same direction without using any special mirror or any special thickness gauge.

Claims (4)

  1. Treuil pour ascenseur, comprenant :
    un boîtier (11) côté moteur avec un moteur (16, 19) agencé dedans ;
    un boîtier (12) côté frein qui est agencé de manière opposée audit boîtier (11) côté moteur et solidement fixé à celui-ci ;
    un arbre fixe (10) qui pénètre à travers ledit boîtier (12) côté frein et ledit boîtier (11) côté moteur et est solidement fixé à ceux-ci ;
    une poulie (4) qui est montée en rotation sur ledit arbre fixe (10) dans ledit boîtier (12) côté frein;
    un tambour de frein (14) qui est monté sur ledit boîtier (11) côté moteur de manière à tourner conjointement avec ladite poulie (4) ;
    deux bras de frein (22) dont des extrémités sont montées en rotation sur ledit boîtier (12) côté frein ;
    des segments de frein (24) qui sont montés sur lesdits bras de frein (22), respectivement, de manière à être en contact coulissant avec des surfaces de freinage (25), respectivement, dudit tambour de frein (14) ;
    des ressorts de frein (30) qui sont agencés dans ledit boîtier (12) côté frein entre lesdits deux bras de frein (22) de sorte que lesdits deux bras de frein (22) soient sollicités dans une direction permettant de les éloigner l'un de l'autre ; et
    un aimant électromagnétique (31) qui est agencé dans ledit boîtier (12) côté frein entre les autres extrémités desdits deux bras de frein (22) de manière à attirer lesdites autres extrémités contre des forces élastiques desdits ressorts de frein (30) pour faire tourner ainsi lesdits bras de frein (22).
  2. Treuil pour ascenseur tel que revendiqué dans la revendication 1, comprenant en outre :
    des rondelles sphériques (27) qui peuvent coulisser par rapport à des parties concaves hémisphériques (26) formées dans des surfaces desdits segments de frein (24) au niveau d'un côté opposé aux surfaces de freinage (25) desdits segments de frein (24), respectivement ;
    des boulons (23) qui pénètrent à travers lesdits bras de frein (22) et lesdites rondelles (27) pour fixer solidement lesdits segments de frein (24) auxdits bras de frein (22) par leurs extrémités de pointe, respectivement ; et
    des ressorts (29) qui sont agencés entre des têtes (28) de parties d'extrémité de base desdits boulons (23) et lesdits bras de frein (22) pour solliciter lesdits segments de frein (24) vers lesdits bras de frein (22), respectivement.
  3. Treuil pour ascenseur tel que revendiqué dans la revendication 1 ou 2, dans lequel des verrous de câble (32) sont montés sur ledit boîtier (12) côté frein de manière à couvrir lesdites rainures (15) de ladite poulie (4) pour empêcher ainsi ledit câble (5) de se dégager desdites rainures (15).
  4. Treuil pour ascenseur tel que revendiqué dans l'une quelconque des revendications 1 à 3, dans lequel ledit treuil (3) est solidement fixé à une surface de paroi de ladite cage (1) d'ascenseur de telle manière que ladite poulie (4) fait face à un côté de ladite cabine (7) qui se déplace vers le haut et vers le bas dans ladite cage (1) d'ascenseur.
EP04771055.3A 2004-07-29 2004-07-29 Palan pour ascenseur Expired - Fee Related EP1790609B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2004/010842 WO2006011214A1 (fr) 2004-07-29 2004-07-29 Palan pour ascenseur

Publications (3)

Publication Number Publication Date
EP1790609A1 EP1790609A1 (fr) 2007-05-30
EP1790609A4 EP1790609A4 (fr) 2011-07-20
EP1790609B1 true EP1790609B1 (fr) 2014-03-05

Family

ID=35785973

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04771055.3A Expired - Fee Related EP1790609B1 (fr) 2004-07-29 2004-07-29 Palan pour ascenseur

Country Status (4)

Country Link
EP (1) EP1790609B1 (fr)
JP (1) JP4292206B2 (fr)
CN (1) CN100537392C (fr)
WO (1) WO2006011214A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5070912B2 (ja) * 2007-04-10 2012-11-14 株式会社日立製作所 エレベーター用巻上機
JP4825843B2 (ja) * 2008-06-18 2011-11-30 株式会社日立製作所 ブレーキ装置
WO2017022097A1 (fr) * 2015-08-05 2017-02-09 三菱電機株式会社 Treuil du type à rotor interne
WO2018142585A1 (fr) * 2017-02-03 2018-08-09 三菱電機株式会社 Treuil de type à rotor interne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI94123C (fi) * 1993-06-28 1995-07-25 Kone Oy Vetopyörähissi
FI95689C (fi) * 1994-06-23 1996-03-11 Kone Oy Hissikoneisto
JP3549990B2 (ja) * 1997-01-22 2004-08-04 三菱電機株式会社 ブレーキ装置
JP3725979B2 (ja) * 1998-07-07 2005-12-14 株式会社日立製作所 エレベーター装置
JP3537348B2 (ja) * 1999-04-05 2004-06-14 三菱電機株式会社 トラクション式エレベーター用巻上機
JP2002362861A (ja) * 2001-06-04 2002-12-18 Mitsubishi Electric Corp エレベーター巻上機の制動装置

Also Published As

Publication number Publication date
WO2006011214A1 (fr) 2006-02-02
CN100537392C (zh) 2009-09-09
EP1790609A1 (fr) 2007-05-30
CN1823001A (zh) 2006-08-23
EP1790609A4 (fr) 2011-07-20
JPWO2006011214A1 (ja) 2008-05-01
JP4292206B2 (ja) 2009-07-08

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