FR2561226B1 - SAFETY DEVICE OF A LOAD LIFTING APPARATUS - Google Patents

SAFETY DEVICE OF A LOAD LIFTING APPARATUS

Info

Publication number
FR2561226B1
FR2561226B1 FR8404054A FR8404054A FR2561226B1 FR 2561226 B1 FR2561226 B1 FR 2561226B1 FR 8404054 A FR8404054 A FR 8404054A FR 8404054 A FR8404054 A FR 8404054A FR 2561226 B1 FR2561226 B1 FR 2561226B1
Authority
FR
France
Prior art keywords
pulley
load
chain
block
winch
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
Application number
FR8404054A
Other languages
French (fr)
Other versions
FR2561226A1 (en
Inventor
Daniel Blaive
Eric Chopinet
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.)
Novatome SA
Original Assignee
Novatome SA
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 SA filed Critical Novatome SA
Priority to FR8404054A priority Critical patent/FR2561226B1/en
Priority to AT85400486T priority patent/ATE29867T1/en
Priority to EP85400486A priority patent/EP0155217B1/en
Priority to DE8585400486T priority patent/DE3560671D1/en
Publication of FR2561226A1 publication Critical patent/FR2561226A1/en
Application granted granted Critical
Publication of FR2561226B1 publication Critical patent/FR2561226B1/en
Expired legal-status Critical Current

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)
  • Jib Cranes (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Forklifts And Lifting Vehicles (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).
FR8404054A 1984-03-16 1984-03-16 SAFETY DEVICE OF A LOAD LIFTING APPARATUS Expired FR2561226B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8404054A FR2561226B1 (en) 1984-03-16 1984-03-16 SAFETY DEVICE OF A LOAD LIFTING APPARATUS
AT85400486T ATE29867T1 (en) 1984-03-16 1985-03-13 SAFETY DEVICE FOR LIFTING A LOAD.
EP85400486A EP0155217B1 (en) 1984-03-16 1985-03-13 Safety device for load-hoisting equipment
DE8585400486T DE3560671D1 (en) 1984-03-16 1985-03-13 Safety device for load-hoisting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8404054A FR2561226B1 (en) 1984-03-16 1984-03-16 SAFETY DEVICE OF A LOAD LIFTING APPARATUS

Publications (2)

Publication Number Publication Date
FR2561226A1 FR2561226A1 (en) 1985-09-20
FR2561226B1 true FR2561226B1 (en) 1986-10-31

Family

ID=9302097

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8404054A Expired FR2561226B1 (en) 1984-03-16 1984-03-16 SAFETY DEVICE OF A LOAD LIFTING APPARATUS

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.
WO2002057176A1 (en) * 2001-01-18 2002-07-25 Plumettaz Sa Emergency braking and shock absorbing device for a lift or suspended load
BRPI0318598B1 (en) * 2003-11-27 2016-03-22 Ulma C Y E S Coop lifting system for slides, scaffolding and loads
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
ATE29867T1 (en) 1987-10-15
DE3560671D1 (en) 1987-10-29
EP0155217B1 (en) 1987-09-23
EP0155217A1 (en) 1985-09-18
FR2561226A1 (en) 1985-09-20

Similar Documents

Publication Publication Date Title
CA1216831A (en) Safety device
US4540329A (en) Safety lock for tailgate lift
FR2561226B1 (en) SAFETY DEVICE OF A LOAD LIFTING APPARATUS
NO20002195D0 (en) Device for carrying out work in an elevator shaft
AU581769B2 (en) Improvements relating to a lifting device
ATE33484T1 (en) DEVICE FOR LIMITING THE DESCENT OF AN ELEVATOR.
US2744637A (en) Winches
US3432145A (en) Mobile crane
US5062613A (en) Two speed hoist drive assembly
DE3767015D1 (en) PERSONAL DESCENT DEVICE.
GB2087346B (en) Raising and lowering a jib-type hoisting device
ATE61519T1 (en) LIFTING DEVICE.
ATE68162T1 (en) SAFETY DEVICE FOR THE ELECTRIC WINCH OF A CONSTRUCTION ELEVATOR.
RU2048423C1 (en) Crane for lifting and delivering loads into window aperture in building
FR2374251A1 (en) Safety switch for hoist or lift - uses balance lever to switch off driving motor and switch on warning light if cable fails
ES2031576T3 (en) APPARATUS TO BE FASTENED ON A FIXED PART THROUGH A SUSPENSION BRACKET FOR ELEVATION OR DESCENT OF A PERSON.
KR200180820Y1 (en) Device of transporting for a magnet-crane
JPH1171901A (en) Sending-in method and device for wall panel
JP3765621B2 (en) Winch random winding prevention device
ATE142598T1 (en) SAFETY DEVICE FOR ELEVATORS OR SIMILAR
US372013A (en) Brake for hoisting-engines
GB1082264A (en) Improvements in or relating to electric hoists
SU1191410A1 (en) Mast building hoist
SU954362A2 (en) Device for preventing oscillation of load
KR200314755Y1 (en) Governor for elevator

Legal Events

Date Code Title Description
TP Transmission of property