EP1927570B1 - Mât de grue avec potence de lestage - Google Patents

Mât de grue avec potence de lestage Download PDF

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Publication number
EP1927570B1
EP1927570B1 EP20070356131 EP07356131A EP1927570B1 EP 1927570 B1 EP1927570 B1 EP 1927570B1 EP 20070356131 EP20070356131 EP 20070356131 EP 07356131 A EP07356131 A EP 07356131A EP 1927570 B1 EP1927570 B1 EP 1927570B1
Authority
EP
European Patent Office
Prior art keywords
jib
crane
arm
tower
counterweight
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.)
Active
Application number
EP20070356131
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1927570A1 (fr
Inventor
Jean-Claude Saint-Gerand
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.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
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Publication date
Application filed by Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP1927570A1 publication Critical patent/EP1927570A1/fr
Application granted granted Critical
Publication of EP1927570B1 publication Critical patent/EP1927570B1/fr
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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
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
    • 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
    • B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/342—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes with telescopic elements

Definitions

  • the present invention relates, in general, to the field of folding cranes. More particularly, this invention relates, for such cranes, an assembly consisting of the crane mast and a weight bracket associated with the mast, that is to say a bracket provided for the introduction and withdrawal, on the frame of the crane, stackable ballast blocks for stabilizing and balancing the crane in use thereof.
  • a first solution disclosed in the patent French FR 2306927 in the name of the Applicant, consists of a weight bracket that is mounted on the rotating platform of the crane, and which is connected by a halyard to the collapsible assembly constituted by the mast and the boom of the crane.
  • the weight bracket uses here the driving force of the crane usually used for folding and unfolding the assembly consisting of the mast and the boom, and the device can not be considered as autonomous.
  • ballast bracket attached to the mast of the crane, near its base, the mast being here telescopic.
  • the cable and the winch which control the telescoping of the mast of the crane are, in this case, also used to operate the stem and thus manipulate the ballast blocks.
  • the device is not autonomous. In addition it is necessary to position the ballast blocks by hand.
  • a self-erecting crane marketed by the Applicant under the name IGO28, and described in the documentation POTAIN 363-0200-032-0-FR, provided with a gallows weighting the cable is moved by the crane winch hoist, and which is equipped with a hydraulic steering mechanism.
  • the steering mechanism is connected to the hydraulic power unit of the crane, which involves the realization of a long and complicated hydraulic circuit to take into account the folding of the crane and the telescoping of the mast.
  • the steering cylinder of the stem being a small diameter cylinder while the hydraulic unit of the crane is designed to deliver a large fluid flow necessary to lift the crane, the rotating operation of the ballast bracket is somewhat progressive, which requires installing a flow limiter.
  • the present invention aims at eliminating the disadvantages of the various known solutions mentioned above, and its purpose is therefore to provide a device which makes it possible to automate as much as possible the weighting of a folding crane of the kind in question here, avoiding any manual intervention painful and dangerous, and also make the gallows self-ballast, so easily removable, and finally make the operation of this gallows more progressive, especially in its orientation movement.
  • the subject of the invention is essentially a crane mast with a ballast bracket, in particular for a collapsible construction crane, the weighting bracket intended for the handling of ballast blocks being, at least during use, fixed. to the mast or to an element thereof, said weighting bracket comprising a jib arm articulated about a vertical axis on the mast, and a tie rod which connects the mast to the front end of the jib arm, end which carries at least one pulley for the passage of a cable usable for lifting at least one ballast block, this assembly being characterized by the fact that, being of autonomous and removable design, the stem arm is coupled to a jack orientation with a power supply of its own.
  • the steering cylinder is a hydraulic cylinder, and its power supply is performed by a hydraulic unit belonging to the ballast bracket.
  • the hydraulic unit can be carried by the rear end of the stem arm, for example by a hinge yoke provided at this end of the stem arm.
  • the steering movement of the ballast bracket is motorized by means of a jack which is made independent of the hydraulic unit and the hydraulic circuit of the crane, in particular by using a integrated hydraulic power station at the weighting bracket and sized according to the energy requirements of this stem.
  • the hydraulic hoses that connect the control unit to the orientation cylinder can therefore be very short, and this cylinder operates very gradually.
  • disassembly of the ballast bracket that is to say its separation from the mast of the crane, is also facilitated.
  • the stem thus made easily removable can be used on several identical cranes.
  • the tie rod which connects the mast of the crane to the front end of the stem arm is composed of a flexible cable attached to the mast of the crane, and a rigid bar which extends the cable and is hinged to the front end of the stem arm.
  • spring means such as a gas spring, are associated with the articulation of the rigid bar of the tie rod with the front end of the arm of the bracket, said spring means tending to rotate the bar relative to the arm of gallows in a predetermined direction. Thanks to these provisions, a folding of the tie is effected and is even easier, during the folding of the crane, so as to simultaneously fold the arm of the bracket against the mast of the crane.
  • the figure 1 represents, in side view, a folding tower crane, which comprises a fixed base frame 2, a rotating frame 3 which can be rotated relative to the fixed frame 2, a telescopic and foldable mast 4 made in two elements 5 and 6, and an arrow collapsible 7 made, in the example, in three successive deflection elements 8, 9 and 10.
  • the lower element 5 of the mast 4 is hingedly connected to the rotating frame 3 by two front stays 11 and two rear shrouds 12 , while the rear end of the boom 7 is hinged to the top of the upper element 6 of the mast 4.
  • An arrow retainer 13 here not detailed, holds the boom 7 in the horizontal position, in the working position crane that is to say when the mast 4 is erected vertically.
  • ballast bracket 15 is provided which is associated with the mast 4 and, more particularly, to the lower element 5 of this mast.
  • the figures 2 , 3 and 4 represent, in particular, the structure of the weighting bracket 15.
  • This weighting bracket 15 comprises a rigid stem arm 16 whose rear end is hingedly connected to the mast element 5 and whose front end is connected by an oblique tie rod 17 to the same mast element 5. .
  • the tie rod 17 is composed of a flexible cable 18 and a rigid bar 19.
  • the cable 18 is attached at a fixed point 20 to the mast element 5, in the upper part of this mast element.
  • the bar 19, which extends the cable 18, is articulated about a horizontal axis 21 on a vertical end cap 22 of the stem arm 16.
  • the end of the bar 19, which extends beyond the axis 21, is connected by a gas spring 23 to a point of the end yoke 22.
  • This end cap 22 of the jib arm 16 carries a horizontal axis 24, on which is mounted freely rotatable a first pulley 25 (see in particular the figure 3 ).
  • the jib arm 16 At its posterior end (see in particular the figure 4 ), the jib arm 16 comprises another vertical clevis 26, which is articulated by a horizontal axis 27 on a support 28, itself pivotally mounted along a vertical axis 29 on the lower mast element 5, close to the one of the corner members 30 of this mast element 5.
  • a hydraulic steering cylinder 31, arranged horizontally on one side of the mast element 5, has a cylinder body 32 articulated at a fixed point 33 of this mast element 5, and a cylinder rod 34 which is hinged in a point 35 on a lateral arm of the pivoting support 28.
  • the rear yoke 26 of the jib arm 16 carries, in its upper part, a hydraulic unit 36 which comprises a pump unit with an electric motor powered by alternating current available on the crane or on site.
  • a hydraulic unit 36 which comprises a pump unit with an electric motor powered by alternating current available on the crane or on site.
  • Two hydraulic hoses 37 and 38 connect the hydraulic unit 36 to the two chambers of the orientation cylinder 31.
  • the rear clevis 26 of the jib arm 16 also carries a horizontal axis 39, on which is mounted freely rotating a second pulley 40.
  • a cable 41 passes over the pulleys 25 and 40, the end of the cable 41 which hangs under the first pulley 25 having a hook 42 to which can be suspended, by means of slings 43, a block of ballast 14.
  • the cable 41 After passing over the second pulley 40 of the bracket 15, the cable 41 is directed downwards and then returned upwards by two other pulleys 44 and 45 located in the lower part of the mast element 5. Finally, The other end of the cable 41 is connected here by a hauling pulley 46 to the existing hoisting rope 47 of the crane, which is wound in a known manner around a drum of a hoist winch (not shown). The actuation of this winch moves the hoisting rope 47, which itself moves the cable 41 of the weighting bracket 15, so as to raise or lower the ballast block 14 suspended from the hook 42.
  • the combined operation of the hoist winch, and the orientation jack 31, makes it possible to move the ballast blocks 14 successively, for stack them on the rotating frame 3 of the crane or to remove them from this frame 3.
  • the weighting bracket 15 makes it possible to remove all the ballast blocks 14, before proceeding to fold the crane itself prior to the transporting the crane on a trailer or semi-trailer.
  • Figures 6 and 7 illustrate, in two successive phases, the folding of the crane which is here accompanied by a folding of the weighting bracket 15.
  • the assembly consisting of the arrow 7 and the mast 4 on the back that is to say to the side previously occupied by the ballast, as illustrated by the figure 6 .
  • the jib arm 16 then abuts against one of the rear shrouds 12.
  • ballast bracket 15 can be quickly dismantled, that is to say separated from the mast 4 of the crane, since it is linked to the mast 4 only at the level the point of attachment 20 of the cable 18 and at the level of the steering cylinder 31, this by means of connecting pins.
  • ballast device 15 may similarly be mounted on the lower member of a mast.
  • folding crane that is to say a mast consisting of two or more mast elements superimposed, articulated between them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)
EP20070356131 2006-11-28 2007-09-28 Mât de grue avec potence de lestage Active EP1927570B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0610393A FR2909082B1 (fr) 2006-11-28 2006-11-28 Mat de grue avec potence de lestage

Publications (2)

Publication Number Publication Date
EP1927570A1 EP1927570A1 (fr) 2008-06-04
EP1927570B1 true EP1927570B1 (fr) 2011-07-06

Family

ID=38222509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070356131 Active EP1927570B1 (fr) 2006-11-28 2007-09-28 Mât de grue avec potence de lestage

Country Status (3)

Country Link
EP (1) EP1927570B1 (es)
ES (1) ES2368766T3 (es)
FR (1) FR2909082B1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112660327A (zh) * 2020-12-09 2021-04-16 大连中远海运重工有限公司 浮式生产储存卸货装置改装压载管舱内倒运工装支架
FR3120619B1 (fr) * 2021-03-10 2023-12-01 Manitowoc Crane Group France Procédé de répartition d’une puissance électrique sur des équipements d’une grue
FR3120618B1 (fr) 2021-03-10 2023-11-03 Manitowoc Crane Group France Procédé de gestion d’alimentation électrique d’une grue à partir d’une source primaire et d’une source secondaire rechargeable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2049462A6 (es) * 1969-06-13 1971-03-26 Loirecord Ste
DE2326022C2 (de) * 1973-05-22 1975-05-22 Liebherr, Hans, Dr.-Ing. E.H., 7950 Biberach StraBenverfahrbarer Turmdrehkran
FR2306927A1 (fr) * 1975-04-09 1976-11-05 Potain Sa Potence mecanisee pour le levage et le positionnement precis d'un lest sur une grue orientable
FR2490609A1 (fr) * 1980-09-24 1982-03-26 Manitou Bf Sa Grue munie d'un dispositif de levage auxiliaire notamment pour la manutention de blocs de lestage

Also Published As

Publication number Publication date
FR2909082B1 (fr) 2009-01-09
ES2368766T3 (es) 2011-11-22
FR2909082A1 (fr) 2008-05-30
EP1927570A1 (fr) 2008-06-04

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