EP1048606A1 - Grue - Google Patents

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Publication number
EP1048606A1
EP1048606A1 EP00201522A EP00201522A EP1048606A1 EP 1048606 A1 EP1048606 A1 EP 1048606A1 EP 00201522 A EP00201522 A EP 00201522A EP 00201522 A EP00201522 A EP 00201522A EP 1048606 A1 EP1048606 A1 EP 1048606A1
Authority
EP
European Patent Office
Prior art keywords
boom
crane
rotation
attached
crane base
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.)
Withdrawn
Application number
EP00201522A
Other languages
German (de)
English (en)
Inventor
Gijsbert Nieuwenhuis
Jacob Jan Dorresteijn
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.)
Figee Bv
Original Assignee
Figee Bv
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 Figee Bv filed Critical Figee Bv
Publication of EP1048606A1 publication Critical patent/EP1048606A1/fr
Withdrawn legal-status Critical Current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
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52—Floating cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
    • B66C13/54—Operator's stands or cabins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
    • B66C23/08—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • B66C23/14—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes with means, e.g. pantograph arrangements, for varying jib configuration

Definitions

  • the invention relates to a crane, comprising a foot provided with a turntable by means of which a crane base is rotatably supported, a front boom and a rear strut which are attached to the crane base some distance apart about parallel axes of rotation orientated transversely to the axis of rotation of the turntable, a top boom, the rear end of which is attached to the rear strut such that it can pivot about an axis of rotation parallel to the axes of rotation on the crane base, the front boom being attached to said top boom, between the rear end and the front end, such that it can pivot about an axis of rotation parallel to the axis of rotation at the rear end, balancing means which interact with one of the booms and a hoist line suspended from the front end.
  • a crane of this type is known and is also referred to as a lemniscate crane after the movement executed by the top boom thereof.
  • the crane can in particular be used as a floating crane for unloading ships carrying a bulk load such as coal, iron ore and the like.
  • the known crane has a front boom and a rear strut which are both constructed as arms which are rigid with respect to bending. As a consequence thereof both arms play a role in transmitting horizontal transverse loadings on the top boom to the crane base.
  • Such a construction is fairly heavy and, as a consequence of the rigidity of the two arms, can give rise to problems which are associated with the correct mutual alignment of the various pivot joints.
  • the aim of the invention is to provide a crane of such a type which does not have these disadvantages.
  • This aim is achieved in that the front boom and the pivot joints thereof with the top boom and the crane base are designed to transmit compressive forces and torque and the rear strut and/or at least one of the pivot joints thereof with the top boom and the crane base are designed to transmit essentially only tensile forces.
  • the front boom of the crane according to the invention is constructed as a torsion arm that is so rigid that it is able fully to absorb the horizontal transverse loadings exerted on the top boom and moments resulting therefrom.
  • the rear strut does not play any part in transmitting these transverse loadings.
  • the front boom preferably has a lower widened or fork-shaped end, the two ends or fork legs of which each have a bearing by means of which the front boom is pivotably attached to the crane base.
  • the front boom can preferably also have an upper widened or fork-shaped end, the two ends or fork legs of which each have a bearing by means of which the front boom is pivotably attached to the top boom.
  • this arm has only a single bearing unit at at least one end, by means of which bearing unit said arm is attached to the crane base and/or to the top boom.
  • a bearing unit can comprise a ball joint bearing.
  • the other bearing unit can be a torsionally rigid bearing unit.
  • the rear strut can be constructed in various ways.
  • this can be a torsionally slack arm.
  • This can be provided with one or two torsionally rigid pivot joints. Torsionally slack pivot joints are also possible with such a rear strut.
  • the rear strut can be a torsionally rigid arm, one or both pivot joints of which are torsionally slack.
  • balancing means are provided which are attached to the front boom.
  • the front boom already has a rigid construction per se in connection with the fact that this arm has to absorb the torsional loadings. Consequently this arm is particularly suitable for absorbing balancing forces and moments.
  • Said balancing means can comprise at least one balance arm which is pivotably mounted, between the two ends, on the crane base about an axis of rotation parallel to the axes of rotation of the front boom and rear strut, which balance arm is joined at one end to one of said boom and strut and carries a balance weight at the other end.
  • the balance arm can be pivotably joined to the front boom via a coupling rod provided with a pivot joint at both ends.
  • two balance arms are provided which are arranged symmetrically with respect to the turntable and each of which carries its own balance weight.
  • the crane base has a tower which extends obliquely upwards to the rear, the rear strut being attached to the free end thereof.
  • a cab boom is pivotably attached to the front boom.
  • a cab for the operator is located at the front end of said cab boom and a tie bar is pivotably attached to the rear end thereof, which tie bar is also pivotably attached to the crane base such that a parallelogram guide is formed with the front boom.
  • the crane shown in the figures comprises a foot 1 on which the crane base 2 is rotatably supported by means of turntable 3.
  • the crane base has a tower 4 which extends upwards and to the rear.
  • the front boom 6 is pivotably supported on the crane base by means of bearings 5.
  • the rear strut 8 is pivotably supported at the end of the tower 4 by means of bearings 7.
  • the front boom 6 and the rear strut 8 are likewise pivotably attached to the top boom 11 at their upper ends by means of bearings 9 and 10, respectively.
  • the hoist line 12, with the grab 13 thereon, is supported at the end of the top boom 11 by means of a hoisting installation, no further details of which are given.
  • the front boom 6 is provided at the bottom end thereof with a fork-shaped end 14 which has two fork legs 15 angled away from one another.
  • Each of the fork legs 15 is attached to the crane base 2 by means of a bearing 5.
  • the front boom 6 is also provided at its top end with a fork-shaped end 16, with two fork legs 17 angled away from one another. Said fork legs 17 support the top boom 11 by means of the bearings 9.
  • the front boom 6 is of a torsionally rigid construction. In view of this torsion construction and the fork-shaped ends 14, 16, the front boom 6 is able fully to absorb transverse loadings on the top boom 11, which give rise to a torsional load in the front boom 6.
  • the rear strut 8 takes no or virtually no part in the transmission of these transverse stresses to the top boom 11.
  • the rear strut 8 can therefore be constructed as a tensile strut.
  • One of the bearings 7, 10 can be constructed as a ball joint; the other bearing can be torsionally rigid in connection with positioning of the rear strut 8.
  • balance arms 18 are provided, at the end of each of which a balance weight 19 is located.
  • the balance arms are pivotably attached to the fixed arm 4 about pivot shaft 20.
  • Each balance arm 18 is joined to the front boom 6 by means of a coupling rod 21.
  • Adjustment of the position of the booms and strut 6, 8, 11 is achieved by means of the hydraulic piston/cylinder devices 22, which at one end are attached to the front boom 6 and at the other end are attached to the fixed structure 4.
  • a cab boom 23 is also pivotably attached to the front boom. Said cab boom 23 is attached, at that end thereof which extends towards the rear with respect to the pivot joint 24, to a tie bar 25 which runs parallel to the front boom 6.
  • the cab boom 23 is thus able to move with the booms and strut 6, 8 and 11 by means of a parallelogram suspension, such that the operator in the cab 26 located at the front of said cab boom 23 always has a good view of a load to be unloaded.
  • the crane is accommodated on a pontoon, indicated in its entirety by 27, which is known per se and will not be further described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP00201522A 1999-04-27 2000-04-27 Grue Withdrawn EP1048606A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1011906A NL1011906C2 (nl) 1999-04-27 1999-04-27 Hijskraan.
NL1011906 1999-04-27

Publications (1)

Publication Number Publication Date
EP1048606A1 true EP1048606A1 (fr) 2000-11-02

Family

ID=19769096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00201522A Withdrawn EP1048606A1 (fr) 1999-04-27 2000-04-27 Grue

Country Status (2)

Country Link
EP (1) EP1048606A1 (fr)
NL (1) NL1011906C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100028105A1 (en) * 2005-12-24 2010-02-04 Ulrich Malchow Floating Device for Transporting and Transferring Containers
CN104229641A (zh) * 2014-09-02 2014-12-24 珠海三一港口机械有限公司 一种起重机
CN104261263A (zh) * 2014-09-02 2015-01-07 珠海三一港口机械有限公司 一种提高门座式起重机司机室视野的被动机构和起重机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104444851B (zh) * 2014-11-17 2016-07-06 广东粤新海洋工程装备股份有限公司 一种船用吊机安装方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE493548A (fr) * 1949-01-26 1950-05-16
US4081932A (en) * 1975-08-11 1978-04-04 Pool Company Platform crane
US4653656A (en) * 1984-07-30 1987-03-31 Triplett James T Double center luffing crane
WO1989010892A1 (fr) * 1988-04-28 1989-11-16 Amca International Corporation Fixation de deplacement etendu du crochet en eaux profondes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE493548A (fr) * 1949-01-26 1950-05-16
US4081932A (en) * 1975-08-11 1978-04-04 Pool Company Platform crane
US4653656A (en) * 1984-07-30 1987-03-31 Triplett James T Double center luffing crane
WO1989010892A1 (fr) * 1988-04-28 1989-11-16 Amca International Corporation Fixation de deplacement etendu du crochet en eaux profondes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100028105A1 (en) * 2005-12-24 2010-02-04 Ulrich Malchow Floating Device for Transporting and Transferring Containers
CN104229641A (zh) * 2014-09-02 2014-12-24 珠海三一港口机械有限公司 一种起重机
CN104261263A (zh) * 2014-09-02 2015-01-07 珠海三一港口机械有限公司 一种提高门座式起重机司机室视野的被动机构和起重机
CN104261263B (zh) * 2014-09-02 2016-06-08 三一海洋重工有限公司 一种提高门座式起重机司机室视野的被动机构和起重机

Also Published As

Publication number Publication date
NL1011906C2 (nl) 2000-10-30

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