ATE29867T1 - SAFETY DEVICE FOR LIFTING A LOAD. - Google Patents

SAFETY DEVICE FOR LIFTING A LOAD.

Info

Publication number
ATE29867T1
ATE29867T1 AT85400486T AT85400486T ATE29867T1 AT E29867 T1 ATE29867 T1 AT E29867T1 AT 85400486 T AT85400486 T AT 85400486T AT 85400486 T AT85400486 T AT 85400486T AT E29867 T1 ATE29867 T1 AT E29867T1
Authority
AT
Austria
Prior art keywords
pulley
load
chain
block
winch
Prior art date
Application number
AT85400486T
Other languages
German (de)
Inventor
Daniel Blaive
Eric Chopinet
Original Assignee
Novatome
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 Novatome filed Critical Novatome
Application granted granted Critical
Publication of ATE29867T1 publication Critical patent/ATE29867T1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B66D3/10—Applications of braking or detent devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B66C15/02—Safety gear for retaining load-engaging elements in the event of rope or cable breakage

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Jib Cranes (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

1. A safety device for a load hoisting apparatus comprising at least one winch (1) whose pulley is a chain pulley, a hoisting chain (18) returned in the lower part of its path by a second chain pulley (24) rotatively mounted on a horizontal shaft in the body of a pulley-block (21) to which the load (20) is hooked, and means (2) for taking up the vertical portion (18b) of the chain (18) opposed to the portion (18a) connecting the winch (1) to the second pulley (24), the safety device comprising at least one roller for wedging the second pulley (24) relative to the pulley-block (21) disposed within the pulley (24) and novable between an inoperative position, the pulley (24) being then free to rotate in the body of the pulley-block (21) for the displacement of the load (20), and an operative position in which the pulley (24) is locked against rotation in the pulley-block (21), characterised in that the wedging roller disposed in a cavity (28) of a support (26) integral with the body of the pulley-block (21) inside the pulley (24), and biased toward the inner surface of the pulley (24) by a spring (31) is actuated by a control unit comprising at least one load sensor (15-16) against which the weight of the load (20) is applied in the normal operation of the winch (1) through the portions (18a, 18b) of the chain (18) and which is released from the load (20) in the case of the breakage of one of the portions of the chain (18), and a pivotal arm (32) associated with at least one electromagnet (35) whose supply is controlled by the load sensor (15-18) maintaining the roller (30) in the retracted position relative to the inner surface of the pulley (24), when it is supplied with power, the load sensor (15-16) bringing about the cutting off of the supply of the electromagnet (35) and the locking of the pulley (24) of the pulley-block (19) when the release of the load (20) effectively corresponds to a breakage of one of the portions of the chain (18), the load being then hooked to the remaining portion (18a, 18b).
AT85400486T 1984-03-16 1985-03-13 SAFETY DEVICE FOR LIFTING A LOAD. ATE29867T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404054A FR2561226B1 (en) 1984-03-16 1984-03-16 SAFETY DEVICE OF A LOAD LIFTING APPARATUS
EP85400486A EP0155217B1 (en) 1984-03-16 1985-03-13 Safety device for load-hoisting equipment

Publications (1)

Publication Number Publication Date
ATE29867T1 true ATE29867T1 (en) 1987-10-15

Family

ID=9302097

Family Applications (1)

Application Number Title Priority Date Filing Date
AT85400486T ATE29867T1 (en) 1984-03-16 1985-03-13 SAFETY DEVICE FOR LIFTING A LOAD.

Country Status (4)

Country Link
EP (1) EP0155217B1 (en)
AT (1) ATE29867T1 (en)
DE (1) DE3560671D1 (en)
FR (1) FR2561226B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511447A (en) * 1992-06-29 1996-04-30 Galloway; Peter E. Automatic ratchet block
ES2116153B1 (en) * 1994-05-30 1999-05-16 Ganchos De Seguridad S L SAFETY SYSTEM FOR LIFTING DEVICES.
EP1351878B1 (en) * 2001-01-18 2004-11-10 Plumettaz Sa Emergency braking device for a vehicle towed or suspended by cables and vehicle equipped with such a device
CN100416023C (en) * 2003-11-27 2008-09-03 乌尔玛结构&包装合作社 Climbing system generally used for formboard, scaffold and load
US7437782B1 (en) * 2006-01-06 2008-10-21 Joerns Healthcare Inc. Load sensing safety device for vertical lift
CN114180453B (en) * 2022-02-17 2022-04-26 河南工学院 Anti-tipping mechanism of crane
CN115367646B (en) * 2022-07-08 2024-05-10 江苏核电有限公司 Main lifting driving device of loading and unloading machine for nuclear power station

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780318A (en) * 1955-10-11 1957-02-05 Roy A Owens Safety block
FR2359780A1 (en) * 1976-07-28 1978-02-24 Lorraine Laminage Controlling pick up of molten metal ladle - in which dynamometers on lifting cables compare loads with reference to sound alarm if incorrect
US4448290A (en) * 1981-11-23 1984-05-15 Acushnet Company Safety device for a cable wound drum

Also Published As

Publication number Publication date
DE3560671D1 (en) 1987-10-29
FR2561226B1 (en) 1986-10-31
FR2561226A1 (en) 1985-09-20
EP0155217B1 (en) 1987-09-23
EP0155217A1 (en) 1985-09-18

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EEIH Change in the person of patent owner
REN Ceased due to non-payment of the annual fee