EP0876988B1 - A load hooking and lifting system - Google Patents

A load hooking and lifting system Download PDF

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Publication number
EP0876988B1
EP0876988B1 EP98201419A EP98201419A EP0876988B1 EP 0876988 B1 EP0876988 B1 EP 0876988B1 EP 98201419 A EP98201419 A EP 98201419A EP 98201419 A EP98201419 A EP 98201419A EP 0876988 B1 EP0876988 B1 EP 0876988B1
Authority
EP
European Patent Office
Prior art keywords
load
lifting
connecting rod
hooking
hook
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
EP98201419A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0876988A2 (en
EP0876988A3 (en
Inventor
Yvan Juchem
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.)
Langonnaise Sah
Original Assignee
Langonnaise Sah
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 Langonnaise Sah filed Critical Langonnaise Sah
Publication of EP0876988A2 publication Critical patent/EP0876988A2/en
Publication of EP0876988A3 publication Critical patent/EP0876988A3/en
Application granted granted Critical
Publication of EP0876988B1 publication Critical patent/EP0876988B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks

Definitions

  • the present invention refers to a load hooking and lifting system, utilised, in particular in the industrial plants for the production and processing of metal parts.
  • a sling In the steel mills and in the foundries, a sling is used to lift and also to move heavy loads, said sling wraps completely the object in order to guarantee a safe hold and to avoid accidents during the whole operation.
  • a hook of a crane is, then, fixed to a rope of the sling, so that the operator, while working in the crane cab, can lift and move the load in every direction.
  • gravity or spring lever systems are further used, said systems require the presence of a second operator (besides the crane operator) to hook or release a rope of the sling to the crane arm.
  • EP 561 751 A which discloses a load hooking and lifting system according to the preamble of claim 1, is able to overcome the above mentioned disadvantages, and to provide a hooking, lifting and release system of slung loads and of other specific equipment with the operator inside a crane cab, and without any operator on the ground.
  • This system is a hooking and lifting system for slung loads which avoids the accidental release of the load sling from the lifting hook, due to accidental jolts, bumps or to unexpected manoeuvres of the crane operator.
  • a purpose of the present invention is to indicate a load hooking and lifting system, whereby its realisation does not require the use of expensive materials and/or of complex technologies.
  • the system of the present invention realises a safety connection between the lifting hook of a crane and a sling, and the crane operator works inside the crane cab, without any intervention by outside operators on the ground, both to hook and to release the loads.
  • This system allows to work with an open hook, without the need to have a gravity or spring type hook; the crane operator needs to wilfully manoeuvre the crane hook in order to release the load, whilst accidental jolts, bumps or unexpected manoeuvres do not cause the fall of the load.
  • the hooking and lifting system comprises a connecting rod, pivoted on the lifting sling of the load; when said connecting rod is horizontally positioned, it allows the engagement of the crane hook, and, when said connecting rod is vertically positioned in the locking position, it locks in place the crane hook.
  • the load hooking and lifting system is generally indicated by numeral 20, said system comprises a sling (indicated by numeral 70), which holds safely and steadily the load, a connecting rod 40, pivoted to the sling 70 of the load at one of its ends 41 and a hook 50 to lift the sling 70.
  • the lifting hook 50 is pivotally connected to a pulley 65 and it is fixed to a handling equipment (e.g. a bridge crane) by means of a rope 72; alternatively, the lifting hook 50 is located at one end of a crane arm (not shown) and it is driven by an operator inside the crane cab.
  • a handling equipment e.g. a bridge crane
  • the hook 50 engages on a projection 43 of the connecting rod 40, said projection is provided at the end 42, which is opposite to the end 41 whereto the load sling 70 is pivotally connected.
  • numeral 30 indicates a metallic element which extends from the surface of the connecting rod 40, in order to hold the hook 50 in its lifting position of the load.
  • the hooking and lifting system 20 works substantially as follows: the load hooking operation is executed when the connecting rod 40, whereto the sling 70 is fixed, reaches a substantially horizontal position (as shown in Figure 1) in relation to the end 41; then, the crane operator, working inside the crane cab, puts the curved surface of the hook 50 in contact with the walls of the projection 43, at the end 42 of the connecting rod 40, in order to guarantee the hold.
  • the connecting rod 40 reaches a vertical position and becomes the connecting element between the lifting means 50 and the sling 70 which holds the load; in this position, the load can be lifted and moved, in any direction, without causing the release and accidental fall of the load, as a consequence of accidental jolts of the lifting equipment or bumps of the load, due to sudden movements or to sudden or unexpected manoeuvring.
  • a holding metallic element 30 is provided, said element extends from the surface of the connecting rod 40 and holds the hook 50 against the walls of the projection 43 and avoids the release of the hook; in fact, a downward movement of the hook 50 is held by one of the surfaces of the element 30, which is formed by a strap of metallic material applied across the direction of the longest dimension of the connecting rod 40 and which is positioned close to the curved portion of the hook 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Jib Cranes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP98201419A 1997-05-05 1998-05-04 A load hooking and lifting system Expired - Lifetime EP0876988B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI001036A IT1291723B1 (it) 1997-05-05 1997-05-05 Sistema di aggancio e sollevamento di carichi
ITMI971036 1997-05-05

Publications (3)

Publication Number Publication Date
EP0876988A2 EP0876988A2 (en) 1998-11-11
EP0876988A3 EP0876988A3 (en) 2000-05-03
EP0876988B1 true EP0876988B1 (en) 2004-03-24

Family

ID=11377067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98201419A Expired - Lifetime EP0876988B1 (en) 1997-05-05 1998-05-04 A load hooking and lifting system

Country Status (4)

Country Link
EP (1) EP0876988B1 (enrdf_load_stackoverflow)
AT (1) ATE262477T1 (enrdf_load_stackoverflow)
DE (1) DE69822547T2 (enrdf_load_stackoverflow)
IT (1) IT1291723B1 (enrdf_load_stackoverflow)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1386583A (en) * 1918-04-03 1921-08-02 Jr John Paterson Hoisting-hook
US3741600A (en) * 1971-07-30 1973-06-26 American Hoist & Derrick Co Safety hook
SE507623C3 (sv) * 1992-02-18 1998-08-10 Wiklund Henry & Co Lyftkrok med saekerhetsspaerr och moejlighet till automatisk lastfrigoering

Also Published As

Publication number Publication date
EP0876988A2 (en) 1998-11-11
DE69822547T2 (de) 2005-04-14
EP0876988A3 (en) 2000-05-03
DE69822547D1 (de) 2004-04-29
IT1291723B1 (it) 1999-01-21
ITMI971036A0 (enrdf_load_stackoverflow) 1997-05-05
ITMI971036A1 (it) 1998-11-05
ATE262477T1 (de) 2004-04-15

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