EP0888997A1 - Mast foldable in three elements with folding/unfolding device for tower crane - Google Patents

Mast foldable in three elements with folding/unfolding device for tower crane Download PDF

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Publication number
EP0888997A1
EP0888997A1 EP98420106A EP98420106A EP0888997A1 EP 0888997 A1 EP0888997 A1 EP 0888997A1 EP 98420106 A EP98420106 A EP 98420106A EP 98420106 A EP98420106 A EP 98420106A EP 0888997 A1 EP0888997 A1 EP 0888997A1
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EP
European Patent Office
Prior art keywords
mast
mast element
articulated
elements
foldable
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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.)
Granted
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EP98420106A
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German (de)
French (fr)
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EP0888997B1 (en
Inventor
Paul Laroche
François Aquino
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Manitowoc Crane Group France SAS
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Potain SA
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/18Cranes 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
    • B66C23/26Cranes 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
    • B66C23/34Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/348Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/18Cranes 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
    • B66C23/26Cranes 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
    • B66C23/34Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes

Definitions

  • the present invention relates, in general, the field of foldable and collapsible tower cranes automatically, in particular for their transport to road, to the place of use and from a site to a other.
  • This invention is more particularly relative at the mast of such cranes.
  • mast cranes made up of a single element, telescopic mast cranes, lifting cranes mast foldable in several elements, and mast cranes foldable and telescopic.
  • the present invention relates to tower cranes of the foldable mast type, i.e. a mast consisting of at least two superimposed mast elements connected to each other by a joint, and capable of thus be folded to reduce the size of the mast and bring it into a substantially horizontal position, so to facilitate road transport of the crane.
  • the problem usually installed is to fold up in a minimal space, or less in a given transport space, a mast which, in the deployed working position, must have a maximum height or a given height.
  • Foldable mast cranes usually have a folding mast composed of only two elements of mast, i.e. a lower mast element articulated on the rotating chassis of the crane, and a mast element hinged top at the top of the mast element inferior.
  • a cylinder and connecting rod device which includes a hydraulic cylinder connecting the mast element lower than the upper mast element using a connecting rods, and dressage shrouds connecting the chassis rotating at the base of the upper mast element.
  • the present invention aims to provide a solution economical to the problem of making a tower crane foldable in a small footprint, for a height maximum working time, the proposed solution remaining within the frame of foldable masts.
  • the invention provides a foldable mast in three elements, which in the transport position is folded in a substantially triangular configuration, particularly compact, while in position work the three mast elements are in a position substantially vertical and provide a working height optimal.
  • This mast is provided with a folding / unfolding, also ensuring its straightening, which is relatively simple and based on the mechanical principle of a deformable double quadrilateral.
  • the intermediate mast element has advantageously a triangular shape, the apex of which away from the longitudinal axis of said mast element intermediate serves as a point of attachment and articulation superior for the shroud (s), and also point attachment and lower articulation for the tie rod.
  • the motorization means here comprise a single cylinder, which directly controls the deformation of the lower quadrilateral previously defined, while the upper quadrilateral is deformed, so synchronized, by the action of the linkage itself driven by the deformation of the lower quadrilateral.
  • the mast in three elements, object of the invention is thus unfolded in a continuous movement, from the folded position of transport to the upright working position, folding of this mast taking place in a movement strictly reverse.
  • the second cylinder allows here to deform the one way deformable quadrilateral independent of the lower quadrilateral, which allows modify and adapt the unfolding space to avoid obstacles such as walls, trees, power lines, etc ...
  • the tower crane shown in the drawing includes a base frame 1 which supports, by means of a orientation mechanism 2, a rotating chassis 3 on which is articulated around a horizontal axis 4, a mast foldable 5 composed of three elements, namely: one element lower mast 6, an intermediate mast element 7 and an upper mast element 8.
  • the lower mast element 6 is articulated by its base, around horizontal axis 4, on the chassis rotating 3.
  • the intermediate mast element 7, of relatively short, is articulated by its base, around a horizontal axis 9, at the top of the element lower mast 6.
  • the upper mast element 8 is articulated by its base, around a horizontal axis 10, at the top of the intermediate mast element 7.
  • the three elements of mast 6, 7 and 8 consist of trellis or boxes.
  • the intermediate mast element 7 is extended laterally and backwards by a part 11 moving away from the longitudinal axis 12 of this mast element intermediate 7, which thus presents, seen from the side, a general triangular appearance.
  • the axes of articulation horizontal 4, 9 and 10 are all parallel to each other.
  • the upper mast element 8 carries at its top a distributor crane boom 13, hinged at the top of this mast element 8 around another horizontal axis 14, parallel to the previous ones.
  • the arrow 13 is, it also, carried out in three successive elements, designated respectively as jib foot 15, element 16 arrow folding intermediate and arrowhead 17, hinged together around horizontal axes.
  • jib foot 15 To the base of the jib foot 15 is articulated about an axis horizontal 18, a rigid arrow punch 19 inclined towards rear of crane in working position.
  • a draft of arrow 20 connects the top 21 of the arrow punch 19 to a point 22 of the upper chord of the jib foot 15.
  • Two parallel stay cables 23 are articulated by a end, around the same horizontal axis 24, on the rotating chassis 3.
  • the other end of the two stay cables 23 is articulated, around a same horizontal axis 25, on the rear part 11 of the intermediate mast element 7. More particularly, the attachment axis 25 and of the guy lines 23 is located near the top of the part 11 furthest from the longitudinal axis 12 of this intermediate mast element 7.
  • This structure defines a first quadrilateral deformable 26, of which the four vertices are materialized by the horizontal articulation axes 4, 9, 25 and 24.
  • a hydraulic drive cylinder 27 is articulated by one of its ends, around an axis horizontal 28, to the rotating chassis 3.
  • the other end of the cylinder 27 is articulated around a horizontal axis, in a intermediate point 29 of the length of the mast element lower 6.
  • the jack 27 is located here on the side opposite the shrouds 23, so that it is also located under said mast element lower 6, in the folded transport position. The actuation of the jack 27 controls the deformation of the quadrilateral 26 previously defined.
  • a flexible tie rod 30, called the retaining tie rod arrow is articulated by its lower end around a horizontal axis 31, on the rear part 11 of the intermediate mast element 7; more specifically, the axis 31 of attachment and articulation of the tie rod 30 is located at the top of part 11 furthest from the axis longitudinal 12 of the intermediate mast element 7.
  • the upper end of the arrow retainer 30 is articulated at the top 21 of the arrow punch 19.
  • the upper mast element 8 carries, in its part upper, a short auxiliary punch 32 on which the arrow retaining rod 30 is able to bear, in certain phases of the folding / unfolding process.
  • the structure described above defines a second deformable quadrilateral 33, of which the four vertices are materialized by the horizontal articulation axes 10, 14, 21 and 31.
  • the bent lever 35 is thus articulated, by its two ends, respectively at the two connecting rods 37 and 40. It follows that a modification of the angle formed by the lower mast element 6 and the mast element intermediate 7 is accompanied by a variation corresponding to the angle formed by the mast element intermediate 7 and the upper mast element 8.
  • the deformation of the first quadrilateral deformable 26, controlled by the jack 27, caused by via crankshaft 34 a deformation of the second deformable quadrilateral 33.
  • the base chassis 1 of the crane is itself carried by platform 43 of a small truck.
  • the elements of the mast 5 and boom 13 of the crane are folded over of platform 43 and, in part, above the cabin 44 of the truck carrying the crane.
  • the mast element lower 6 occupies an oblique position, lowering towards the back of the truck.
  • the intermediate mast element 7 occupies a substantially vertical position, behind the truck.
  • the upper mast element 8 occupies a position substantially horizontal, from the back of the truck up to the top of his cabin 44.
  • the arrow 13 is, itself, folded in a substantially horizontal position above of the upper mast element 8.
  • the jack 27 is retracted and takes place under the mast element lower 6, while the linkage 34, folded, occupies the space delimited between the three mast elements 6, 7 and 8.
  • the unfolding of mast 5 in three elements 6, 7 and 8 is carried out continuously, from the position transport folded from figure 1 to position unfolded working figure 4, passing by intermediate positions ( Figures 2 and 3), depending on the principle of the deformation of the two quadrilaterals deformable 26 and 33, the first quadrilateral 26 being deformed directly by the cylinder 27, while the second quadrilateral 33 is deformed through crankshaft 34, without the need for any energy source additional, the crankshaft 34 being itself moved by the deformation of the first quadrilateral 26.
  • FIG. 6 shows another embodiment of the invention, in which the elements common to those previously described are designated by the same references.
  • the connecting rod is deleted and replaced by a second hydraulic cylinder 46.
  • One end of the cylinder 46 is articulated around an axis horizontal 47, on part 11 of the mast element intermediate 7.
  • the other end of the cylinder 46 is articulated, around a horizontal axis 48, at a point intermediate the length of the upper mast element 8, relatively close to the base of this element of the mast superior 8.
  • the second cylinder 46 controls the deformation of the second quadrilateral 33, regardless of the deformation of the first quadrilateral 26 which, as before, is controlled by cylinder 27.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The tower crane foldable mast is made from three components (6,7,8). The lower component (6) is articulated by its base (4) on the crane rotating chassis (3). An intermediate folding component (7) of relatively small length, is articulated (9) at the top of the lower mast component. The upper mast component (8) is articulated at its base (10) on the intermediate component and carries at its top the crane jib (13). The folding/unfolding device comprises a shroud (23) articulated by one end (24) to the rotating chassis and by the other end (25) to the intermediate component. A tie-rod (30) is articulated by one end (31) to the intermediate component and by its other end (21) to a kingpost (19) carried by the jib.

Description

La présente invention concerne, de façon générale, le domaine des grues à tour dépliables et repliables automatiquement, notamment en vue de leur transport sur route, vers le lieu d'utilisation et d'un chantier à un autre. Cette invention est plus particulièrement relative à la mâture de telles grues.The present invention relates, in general, the field of foldable and collapsible tower cranes automatically, in particular for their transport to road, to the place of use and from a site to a other. This invention is more particularly relative at the mast of such cranes.

Dans le domaine des grues à tour dépliables et repliables, on distingue les grues à mât constitué d'un seul élément, les grues à mat télescopique, les grues à mât pliable en plusieurs éléments, et les grues à mât pliable et télescopique. La présente invention se rapporte aux grues à tour du type à mât pliable, c'est-à-dire un mât constitué d'au moins deux éléments de mât superposés reliés l'un à l'autre par une articulation, et pouvant être ainsi repliés pour réduire l'encombrement du mât et l'amener dans une position sensiblement horizontale, afin de faciliter le transport sur route de la grue.In the field of foldable tower cranes and foldable, there are mast cranes made up of a single element, telescopic mast cranes, lifting cranes mast foldable in several elements, and mast cranes foldable and telescopic. The present invention relates to tower cranes of the foldable mast type, i.e. a mast consisting of at least two superimposed mast elements connected to each other by a joint, and capable of thus be folded to reduce the size of the mast and bring it into a substantially horizontal position, so to facilitate road transport of the crane.

Pour ce genre de grue, le problème généralement posé est de replier dans un encombrement minimal, ou du moins dans un encombrement de transport donné, une mâture qui, en position déployée de travail, doit posséder une hauteur maximale ou une hauteur donnée.For this kind of crane, the problem usually installed is to fold up in a minimal space, or less in a given transport space, a mast which, in the deployed working position, must have a maximum height or a given height.

Les grues à mât pliable possèdent, habituellement, une mâture pliante composée seulement de deux éléments de mât, soit un élément de mât inférieur articulé sur le châssis tournant de la grue, et un élément de mât supérieur articulé au sommet de l'élément de mât inférieur. Dans une réalisation connue particulière (voir documents FR-A-2682096 ou EP-A-0536061), la motorisation du dépliage et du repliage du mât en deux éléments est assurée par un dispositif à vérin et embiellage, qui comprend un vérin hydraulique reliant l'élément de mât inférieur à l'élément de mât supérieur à l'aide d'un embiellage, et des haubans de dressage reliant le châssis tournant à la base de l'élément de mât supérieur. Foldable mast cranes usually have a folding mast composed of only two elements of mast, i.e. a lower mast element articulated on the rotating chassis of the crane, and a mast element hinged top at the top of the mast element inferior. In a particular known embodiment (see documents FR-A-2682096 or EP-A-0536061), the motorization unfolding and folding the mast into two parts is ensured by a cylinder and connecting rod device, which includes a hydraulic cylinder connecting the mast element lower than the upper mast element using a connecting rods, and dressage shrouds connecting the chassis rotating at the base of the upper mast element.

D'autres exemples de grues à tour à mât pliable en deux éléments sont donnés par les documents FR-A-2436097, EP-A-0536060 et EP-A-0733583. Un engin de manutention et de levage avec mât pliable en deux éléments, qui n'est pas à considérer comme une véritable grue à tour, est encore décrit dans le document GB-A-2196605.Other examples of foldable mast tower cranes in two elements are given by documents FR-A-2436097, EP-A-0536060 and EP-A-0733583. A handling machine and lifting device with foldable mast in two parts, which is not to be considered a real tower crane, is still described in document GB-A-2196605.

De telles réalisations avec mâture en deux éléments ne résolvent qu'imparfaitement le problème de l'optimisation de la hauteur de travail de la grue, pour un encombrement de transport donné. De plus, elles combinent le dépliage du mât et son dressage, en un mouvement imposé et invariable qui, dans certains cas, peut se heurter à des obstacles préexistants (murs, arbres, lignes électriques, etc...).Such achievements with mast in two elements only partially solve the problem of optimizing the working height of the crane, to a given transport size. In addition, they combine the unfolding of the mast and its straightening, in one imposed and invariable movement which, in some cases, may encounter pre-existing obstacles (walls, trees, power lines, etc.).

Des grues à mât télescopique, voire à mâture pliable et télescopique, pourraient apporter des solutions valables à ce problème, sur le plan strictement cinématique, mais ces solutions sont beaucoup plus onéreuses.Cranes with telescopic mast, or even mast foldable and telescopic, could provide solutions valid for this problem, strictly speaking kinematic but these solutions are much more expensive.

La présente invention vise à apporter une solution économique au problème de la réalisation d'une grue à tour repliable dans un encombrement minimal, pour une hauteur de travail maximale, la solution proposée restant dans le cadre des mâtures pliables.The present invention aims to provide a solution economical to the problem of making a tower crane foldable in a small footprint, for a height maximum working time, the proposed solution remaining within the frame of foldable masts.

A cet effet, l'invention a pour objet une mâture pliable pour grue à tour, réalisée en trois éléments avec :

  • un élément de mât inférieur articulé par sa base sur le châssis tournant de la grue,
  • un élément de mât intermédiaire de pliage, de relativement faible longueur, articulé au sommet de l'élément de mât inférieur, et
  • un élément de mât supérieur, articulé à sa base sur l'élément de mât intermédiaire, et portant à son sommet la flèche de la grue,
cette mâture en trois éléments comportant un dispositif de pliage/dépliage comprenant lui-même :
  • au moins un hauban articulé par une extrémité au châssis tournant et par son autre extrémité à l'élément intermédiaire de pliage du mât,
  • un tirant articulé par une extrémité à l'élément intermédiaire de pliage du mât et, par son autre extrémité, à un poinçon porté par la flèche, et
  • des moyens moteurs servant à déformer, d'une part, le quadrilatère déformable inférieur ayant pour sommets l'axe d'articulation de l'élément de mât inférieur sur le châssis tournant, l'axe d'articulation de l'élément de mât intermédiaire avec l'élément de mât inférieur, l'axe d'articulation du ou des haubans à l'élément de mât intermédiaire et l'axe d'articulation du ou des haubans au châssis tournant, et d'autre part, le quadrilatère déformable supérieur ayant pour sommets l'axe d'articulation de l'élément de mât supérieur avec l'élément de mât intermédiaire, l'axe d'articulation de la flèche au sommet de l'élément de mât supérieur, l'axe d'articulation du tirant précité au poinçon de flèche et l'axe d'articulation de ce tirant à l'élément de mât intermédiaire.
To this end, the invention relates to a foldable mast for a tower crane, made of three elements with:
  • a lower mast element articulated by its base on the rotating chassis of the crane,
  • a relatively short intermediate folding mast element articulated at the top of the lower mast element, and
  • an upper mast element, articulated at its base on the intermediate mast element, and carrying at its top the boom of the crane,
this three-element mast comprising a folding / unfolding device itself comprising:
  • at least one stay hinged by one end to the rotating chassis and by its other end to the intermediate mast folding element,
  • a tie rod articulated by one end to the intermediate folding element of the mast and, by its other end, to a punch carried by the arrow, and
  • motor means serving to deform, on the one hand, the lower deformable quadrilateral having for vertices the axis of articulation of the lower mast element on the rotating frame, the axis of articulation of the intermediate mast element with the lower mast element, the articulation axis of the shroud (s) to the intermediate mast element and the articulation axis of the shroud (s) to the rotating chassis, and on the other hand, the upper deformable quadrilateral having the vertices of the axis of articulation of the upper mast element with the intermediate mast element, the axis of articulation of the arrow at the top of the upper mast element, the axis of articulation of the aforementioned tie rod arrow and the hinge pin of this tie rod to the intermediate mast element.

Ainsi, l'invention propose une mâture pliable en trois éléments, qui en position de transport est repliée selon une configuration sensiblement triangulaire, particulièrement compacte, tandis qu'en position de travail les trois éléments de mât sont dans une position sensiblement verticale et procurent une hauteur de travail optimale. Cette mâture est pourvue d'un dispositif de pliage/dépliage, assurant aussi son dressage, qui est relativement simple et repose sur le principe mécanique d'un double quadrilatère déformable. Pour définir cette configuration, l'élément de mât intermédiaire présente avantageusement une allure triangulaire, dont le sommet éloigné de l'axe longitudinal dudit élément de mât intermédiaire sert de point d'attache et d'articulation supérieur pour le ou les haubans, et aussi de point d'attache et d'articulation inférieur pour le tirant.Thus, the invention provides a foldable mast in three elements, which in the transport position is folded in a substantially triangular configuration, particularly compact, while in position work the three mast elements are in a position substantially vertical and provide a working height optimal. This mast is provided with a folding / unfolding, also ensuring its straightening, which is relatively simple and based on the mechanical principle of a deformable double quadrilateral. To define this configuration, the intermediate mast element has advantageously a triangular shape, the apex of which away from the longitudinal axis of said mast element intermediate serves as a point of attachment and articulation superior for the shroud (s), and also point attachment and lower articulation for the tie rod.

Les moyens de motorisation, assurant le dépliage et le repliage de cette mâture en trois éléments, sont eux aussi simples et d'un coût limité, en particulier dans une forme de réalisation de l'invention où ces moyens comprennent, en combinaison :

  • d'une part, un vérin unique articulé par une extrémité au châssis tournant et, par son autre extrémité, à l'élément de mât inférieur, et
  • d'autre part, un embiellage lié de façon articulée à l'élément de mât intermédiaire, à la partie supérieure de l'élément de mât inférieur et à la partie inférieure de l'élément de mât supérieur.
The motorization means, ensuring the unfolding and folding of this mast into three elements, are also simple and of limited cost, in particular in an embodiment of the invention where these means comprise, in combination:
  • on the one hand, a single jack articulated by one end to the rotating frame and, by its other end, to the lower mast element, and
  • on the other hand, a connecting rod articulated in an articulated manner to the intermediate mast element, to the upper part of the lower mast element and to the lower part of the upper mast element.

Ainsi, les moyens de motorisation comprennent ici un vérin unique, qui commande directement la déformation du quadrilatère inférieur précédemment défini, tandis que le quadrilatère supérieur est déformé, de manière synchronisée, par l'action de l'embiellage lui-même mû par la déformation du quadrilatère inférieur. La mâture en trois éléments, objet de l'invention est ainsi dépliée dans un mouvement continu, depuis la position repliée de transport jusqu'à la position dressée de travail, le repliage de cette mâture se déroulant selon un mouvement rigoureusement inverse.Thus, the motorization means here comprise a single cylinder, which directly controls the deformation of the lower quadrilateral previously defined, while the upper quadrilateral is deformed, so synchronized, by the action of the linkage itself driven by the deformation of the lower quadrilateral. The mast in three elements, object of the invention is thus unfolded in a continuous movement, from the folded position of transport to the upright working position, folding of this mast taking place in a movement strictly reverse.

Selon une autre forme de réalisation de l'invention, les moyens moteurs comprennent, en combinaison :

  • un premier vérin articulé par une extrémité au châssis tournant et, par son autre extrémité, à l'élément de mât inférieur, et
  • un second vérin articulé par une extrémité à l'élément de mât intermédiaire et, par son autre extrémité, à un point intermédiaire de la longueur de l'élément de mât supérieur.
According to another embodiment of the invention, the drive means comprise, in combination:
  • a first jack articulated at one end to the rotating frame and, at its other end, to the lower mast element, and
  • a second cylinder articulated by one end to the intermediate mast element and, by its other end, to an intermediate point of the length of the upper mast element.

Le second vérin permet ici de déformer le quadrilatère déformable supérieur d'une manière indépendante du quadrilatère inférieur, ce qui permet de modifier et d'adapter l'espace de dépliage pour éviter des obstacles tels que murs, arbres, lignes électriques, etc...The second cylinder allows here to deform the one way deformable quadrilateral independent of the lower quadrilateral, which allows modify and adapt the unfolding space to avoid obstacles such as walls, trees, power lines, etc ...

L'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples, quelques formes d'exécution de cette mâture pliable en trois éléments avec dispositif de pliage/dépliage pour grue à tour :

  • Figure 1 représente en vue de côté une grue à tour avec mâture en trois éléments conforme à la présente invention à l'état entièrement replié (position de transport) ;
  • Figure 2 représente en vue de côté la grue de figure 1, dans une position intermédiaire en début de dépliage ;
  • Figure 3 représente la même grue, en vue de côté, dans une autre position intermédiaire en fin de dépliage :
  • Figure 4 est une vue de côté de cette grue en position complètement dépliée (position de travail) ;
  • Figure 5 représente, à échelle agrandie, le détail de l'embiellage du dispositif de pliage de la mâture de la grue des figures 1 à 4 ;
  • Figure 6 est une vue de côté d'une grue à tour avec mâture en trois éléments selon une autre forme de réalisation de l'invention, représentée en cours de dépliage.
  • The invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of examples, some embodiments of this mast foldable into three elements with folding / unfolding device for crane in turn:
  • Figure 1 shows a side view of a tower crane with mast in three elements according to the present invention in the fully folded state (transport position);
  • Figure 2 shows a side view of the crane of Figure 1, in an intermediate position at the start of unfolding;
  • Figure 3 shows the same crane, in side view, in another intermediate position at the end of unfolding:
  • Figure 4 is a side view of this crane in the fully extended position (working position);
  • 5 shows, on an enlarged scale, the detail of the crankshaft of the folding device of the mast of the crane of Figures 1 to 4;
  • Figure 6 is a side view of a tower crane with three-element mast according to another embodiment of the invention, shown during unfolding.
  • La grue à tour représentée au dessin comprend un châssis de base 1 qui supporte, par l'intermédiaire d'un mécanisme d'orientation 2, un châssis tournant 3 sur lequel est articulé, autour d'un axe horizontal 4, un mât pliable 5 composé de trois éléments, à savoir : un élément de mât inférieur 6, un élément de mât intermédiaire 7 et un élément de mât supérieur 8.The tower crane shown in the drawing includes a base frame 1 which supports, by means of a orientation mechanism 2, a rotating chassis 3 on which is articulated around a horizontal axis 4, a mast foldable 5 composed of three elements, namely: one element lower mast 6, an intermediate mast element 7 and an upper mast element 8.

    L'élément de mât inférieur 6 est articulé par sa base, autour de l'axe horizontal 4, sur le châssis tournant 3. L'élément de mât intermédiaire 7, de relativement faible longueur, est articulé par sa base, autour d'un axe horizontal 9, au sommet de l'élément de mât inférieur 6. L'élément de mât supérieur 8 est articulé par sa base, autour d'un axe horizontal 10, au sommet de l'élément de mât intermédiaire 7. Les trois éléments de mât 6, 7 et 8 sont constitués par des treillis ou des caissons. L'élément de mât intermédiaire 7 est prolongé latéralement et vers l'arrière par une partie 11 s'éloignant de l'axe longitudinal 12 de cet élément de mât intermédiaire 7, lequel présente ainsi, vu de côté, une allure générale triangulaire. Les axes d'articulation horizontaux 4, 9 et 10 sont tous parallèles entre eux.The lower mast element 6 is articulated by its base, around horizontal axis 4, on the chassis rotating 3. The intermediate mast element 7, of relatively short, is articulated by its base, around a horizontal axis 9, at the top of the element lower mast 6. The upper mast element 8 is articulated by its base, around a horizontal axis 10, at the top of the intermediate mast element 7. The three elements of mast 6, 7 and 8 consist of trellis or boxes. The intermediate mast element 7 is extended laterally and backwards by a part 11 moving away from the longitudinal axis 12 of this mast element intermediate 7, which thus presents, seen from the side, a general triangular appearance. The axes of articulation horizontal 4, 9 and 10 are all parallel to each other.

    L'élément de mât supérieur 8 porte à son sommet une flèche de grue 13 distributrice, articulée au sommet de cet élément de mât 8 autour d'un autre axe horizontal 14, parallèle aux précédents. La flèche 13 est, elle aussi, réalisée en trois éléments successifs, désignés respectivement comme pied de flèche 15, élément intermédiaire de pliage de flèche 16 et pointe de flèche 17, articulés entre eux autour d'axes horizontaux. A la base du pied de flèche 15 est articulé, autour d'un axe horizontal 18, un poinçon de flèche rigide 19 incliné vers l'arrière de la grue en position de travail. Un tirant de flèche 20 relie le sommet 21 du poinçon de flèche 19 à un point 22 de la membrure supérieure du pied de flèche 15.The upper mast element 8 carries at its top a distributor crane boom 13, hinged at the top of this mast element 8 around another horizontal axis 14, parallel to the previous ones. The arrow 13 is, it also, carried out in three successive elements, designated respectively as jib foot 15, element 16 arrow folding intermediate and arrowhead 17, hinged together around horizontal axes. To the base of the jib foot 15 is articulated about an axis horizontal 18, a rigid arrow punch 19 inclined towards rear of crane in working position. A draft of arrow 20 connects the top 21 of the arrow punch 19 to a point 22 of the upper chord of the jib foot 15.

    Deux haubans parallèles 23 sont articulés par une extrémité, autour d'un même axe horizontal 24, sur le châssis tournant 3. L'autre extrémité des deux haubans 23 est articulée, autour d'un même axe horizontal 25, sur la partie arrière 11 de l'élément de mat intermédiaire 7. Plus particulièrement, l'axe 25 d'attache et d'articulation des haubans 23 est situé près du sommet de la partie 11 le plus éloigné de l'axe longitudinal 12 de cet élément de mât intermédiaire 7.Two parallel stay cables 23 are articulated by a end, around the same horizontal axis 24, on the rotating chassis 3. The other end of the two stay cables 23 is articulated, around a same horizontal axis 25, on the rear part 11 of the intermediate mast element 7. More particularly, the attachment axis 25 and of the guy lines 23 is located near the top of the part 11 furthest from the longitudinal axis 12 of this intermediate mast element 7.

    Cette structure définit un premier quadrilatère déformable 26, dont les quatre sommets sont matérialisés par les axes d'articulation horizontaux 4, 9, 25 et 24.This structure defines a first quadrilateral deformable 26, of which the four vertices are materialized by the horizontal articulation axes 4, 9, 25 and 24.

    Un vérin hydraulique de motorisation 27 est articulé par une de ses extrémités, autour d'un axe horizontal 28, au châssis tournant 3. L'autre extrémité du vérin 27 est articulée, autour d'un axe horizontal, en un point intermédiaire 29 de la longueur de l'élément de mât inférieur 6. Par rapport à cet élément de mât inférieur 6, le vérin 27 se situe ici du côté opposé aux haubans 23, de sorte qu'il se situe aussi sous ledit élément de mât inférieur 6, en position repliée de transport. L'actionnement du vérin 27 commande la déformation du quadrilatère 26 précédemment défini.A hydraulic drive cylinder 27 is articulated by one of its ends, around an axis horizontal 28, to the rotating chassis 3. The other end of the cylinder 27 is articulated around a horizontal axis, in a intermediate point 29 of the length of the mast element lower 6. With respect to this lower mast element 6, the jack 27 is located here on the side opposite the shrouds 23, so that it is also located under said mast element lower 6, in the folded transport position. The actuation of the jack 27 controls the deformation of the quadrilateral 26 previously defined.

    Un tirant souple 30, appelé tirant de retenue de flèche, est articulé par son extrémité inférieure autour d'un axe horizontal 31, sur la partie arrière 11 de l'élément de mât intermédiaire 7 ; plus particulièrement, l'axe 31 d'attache et d'articulation du tirant 30 est situé au sommet de la partie 11 le plus éloigné de l'axe longitudinal 12 de l'élément de mât intermédiaire 7. L'extrémité supérieure du tirant de retenue de flèche 30 est articulée au sommet 21 du poinçon de flèche 19.A flexible tie rod 30, called the retaining tie rod arrow, is articulated by its lower end around a horizontal axis 31, on the rear part 11 of the intermediate mast element 7; more specifically, the axis 31 of attachment and articulation of the tie rod 30 is located at the top of part 11 furthest from the axis longitudinal 12 of the intermediate mast element 7. The upper end of the arrow retainer 30 is articulated at the top 21 of the arrow punch 19.

    L'élément de mât supérieur 8 porte, dans sa partie supérieure, un court poinçon auxiliaire 32 sur lequel le tirant de retenue de flèche 30 est apte à prendre appui, dans certaines phases du processus de pliage/dépliage.The upper mast element 8 carries, in its part upper, a short auxiliary punch 32 on which the arrow retaining rod 30 is able to bear, in certain phases of the folding / unfolding process.

    La structure précédemment décrite définit un second quadrilatère déformable 33, dont les quatre sommets sont matérialisés par les axes d'articulation horizontaux 10, 14, 21 et 31. The structure described above defines a second deformable quadrilateral 33, of which the four vertices are materialized by the horizontal articulation axes 10, 14, 21 and 31.

    La déformation de ce second quadrilatère 33 est commandée au moyen d'un embiellage, désigné dans son ensemble par le repère 34, qui est représenté en détail sur la figure 5. L'embiellage 34 est composé :

    • d'un levier coudé 35, articulé autour d'un axe horizontal 36, situé dans la région de son coude, à l'élément de mât intermédiaire 7 ;
    • d'une bielle 37 articulée par une extrémité, autour d'un axe horizontal 38, à un point de la partie supérieure de l'élément de mât inférieur 6, et par son autre extrémité, autour d'un axe horizontal 39, à un bras du levier coudé 35 ;
    • d'une autre bielle 40, articulée par une extrémité, autour d'un axe horizontal 41, à un point de la partie inférieure de l'élément de mât supérieur 8, et par son autre extrémité, autour d'un axe horizontal 42, à l'autre bras du levier coudé 35.
    The deformation of this second quadrilateral 33 is controlled by means of a connecting rod assembly, generally designated by the reference 34, which is shown in detail in FIG. 5. The connecting rod assembly 34 is composed:
    • a bent lever 35, articulated around a horizontal axis 36, located in the region of its elbow, to the intermediate mast element 7;
    • of a connecting rod 37 articulated by one end, around a horizontal axis 38, at a point of the upper part of the lower mast element 6, and by its other end, around a horizontal axis 39, at a bent lever arm 35;
    • another connecting rod 40, articulated by one end, around a horizontal axis 41, at a point of the lower part of the upper mast element 8, and by its other end, around a horizontal axis 42, to the other arm of the bent lever 35.

    Le levier coudé 35 est ainsi articulé, par ses deux extrémités, respectivement aux deux bielles 37 et 40. Il en résulte qu'une modification de l'angle formé par l'élément de mât inférieur 6 et l'élément de mât intermédiaire 7 s'accompagne d'une variation correspondante de l'angle formé par l'élément de mât intermédiaire 7 et l'élément de mât supérieur 8. En d'autres termes, la déformation du premier quadrilatère déformable 26, commandée par le vérin 27, provoque par l'intermédiaire de l'embiellage 34 une déformation du second quadrilatère déformable 33.The bent lever 35 is thus articulated, by its two ends, respectively at the two connecting rods 37 and 40. It follows that a modification of the angle formed by the lower mast element 6 and the mast element intermediate 7 is accompanied by a variation corresponding to the angle formed by the mast element intermediate 7 and the upper mast element 8. In in other words, the deformation of the first quadrilateral deformable 26, controlled by the jack 27, caused by via crankshaft 34 a deformation of the second deformable quadrilateral 33.

    Le fonctionnement d'ensemble du dispositif de pliage/dépliage du mât 5 découle de ce qui précède, et est illustré par les figures 1 à 4 qui montrent des phases successives du dépliage de la grue, en partant de la position repliée de transport montrée sur la figure 1.The overall functioning of the folding / unfolding the mast 5 follows from the above, and is illustrated by figures 1 to 4 which show phases successive of the unfolding of the crane, starting from the folded transport position shown in Figure 1.

    Dans l'exemple illustré, le châssis de base 1 de la grue est lui-même porté par la plateforme 43 d'un petit camion. Ainsi, en position de transport, les éléments du mât 5 et de la flèche 13 de la grue sont repliés au-dessus de la plateforme 43 et, en partie, au-dessus de la cabine 44 du camion porteur de la grue.In the example illustrated, the base chassis 1 of the crane is itself carried by platform 43 of a small truck. Thus, in the transport position, the elements of the mast 5 and boom 13 of the crane are folded over of platform 43 and, in part, above the cabin 44 of the truck carrying the crane.

    Plus particulièrement, en ce qui concerne le mât 5, dans la position repliée de transport, l'élément de mât inférieur 6 occupe une position oblique, s'abaissant vers l'arrière du camion. L'élément de mât intermédiaire 7 occupe une position sensiblement verticale, à l'arrière du camion. L'élément de mât supérieur 8 occupe une position sensiblement horizontale, depuis l'arrière du camion jusqu'au dessus de sa cabine 44. La flèche 13 est, elle-même, repliée en position sensiblement horizontale au-dessus de l'élément de mât supérieur 8. On notera aussi que, dans cette position repliée de transport, le vérin 27 est rétracté et prend place sous l'élément de mât inférieur 6, tandis que l'embiellage 34, replié, occupe l'espace délimité entre les trois éléments de mât 6, 7 et 8.More specifically, with regard to the mast 5, in the folded transport position, the mast element lower 6 occupies an oblique position, lowering towards the back of the truck. The intermediate mast element 7 occupies a substantially vertical position, behind the truck. The upper mast element 8 occupies a position substantially horizontal, from the back of the truck up to the top of his cabin 44. The arrow 13 is, itself, folded in a substantially horizontal position above of the upper mast element 8. We will also note that, in this folded transport position, the jack 27 is retracted and takes place under the mast element lower 6, while the linkage 34, folded, occupies the space delimited between the three mast elements 6, 7 and 8.

    Pour déployer la grue sur son lieu d'utilisation, des stabilisateurs 45 sont abaissés jusqu'au sol, et le vérin 27 est actionné dans le sens de la sortie de sa tige. L'élément de mât inférieur 6 est ainsi progressivement relevé, en pivotant autour de l'axe horizontal 4, tandis que, compte tenu de la liaison assurée par les haubans 23, l'élément de mât intermédiaire 7 conserve sa position initiale sensiblement verticale. Grâce à l'embiellage 34, l'élément de mât supérieur 8 est lui aussi progressivement relevé, depuis sa position initiale horizontale. La figure 2 montre la configuration de la grue, notamment de son mât 5, dans une position intermédiaire en début de dépliage, tandis que la figure 3 montre la configuration de la grue dans une autre position intermédiaire, plutôt vers la fin du dépliage. Enfin, la figure 4 montre la grue complètement dépliée, les trois éléments de mât 6, 7 et 8 étant parvenus en position sensiblement verticale.To deploy the crane at its place of use, stabilizers 45 are lowered to the ground, and the cylinder 27 is actuated in the direction of exit from its rod. The lower mast element 6 is thus gradually raised, pivoting around the axis horizontal 4, while, given the connection provided by the guys 23, the intermediate mast element 7 retains its initial substantially vertical position. Thanks to the linkage 34, the upper mast element 8 is also progressively raised, from its position horizontal initial. Figure 2 shows the configuration of the crane, in particular of its mast 5, in a position intermediate at the start of unfolding, while Figure 3 shows the configuration of the crane in another position intermediate, rather towards the end of the unfolding. Finally, the figure 4 shows the crane fully extended, the three mast elements 6, 7 and 8 having arrived in position substantially vertical.

    En résumé, le dépliage du mât 5 en trois éléments 6, 7 et 8 s'effectue de façon continue, depuis la position repliée de transport de la figure 1 jusqu'à la position dépliée de travail de la figure 4, en passant par des positions intermédiaires (figures 2 et 3), selon le principe de la déformation des deux quadrilatères déformables 26 et 33, le premier quadrilatère 26 étant déformé directement par le vérin 27, tandis que le second quadrilatère 33 est déformé par l'intermédiaire de l'embiellage 34, sans nécessité d'aucune source d'énergie supplémentaire, l'embiellage 34 étant lui-même mû par la déformation du premier quadrilatère 26.In summary, the unfolding of mast 5 in three elements 6, 7 and 8 is carried out continuously, from the position transport folded from figure 1 to position unfolded working figure 4, passing by intermediate positions (Figures 2 and 3), depending on the principle of the deformation of the two quadrilaterals deformable 26 and 33, the first quadrilateral 26 being deformed directly by the cylinder 27, while the second quadrilateral 33 is deformed through crankshaft 34, without the need for any energy source additional, the crankshaft 34 being itself moved by the deformation of the first quadrilateral 26.

    Simultanément au dépliage du mât 5, on observe le relevage et le dépliage de la flèche 13, qui s'effectuent selon un principe connu en soi, non détaillé ici.Simultaneously with the unfolding of the mast 5, the lifting and unfolding of the boom 13, which takes place according to a principle known per se, not detailed here.

    Le repliage du mât, permettant de ramener la grue en position de transport, se déroule selon un processus rigoureusement inverse du dépliage précédemment décrit, en actionnant le vérin 27 dans le sens de la rentrée de sa tige.The folding of the mast, allowing to bring back the crane in the transport position, takes place according to a process strictly opposite to the unfolding described above, actuating the jack 27 in the direction of the retraction of its rod.

    La figure 6 montre une autre forme de réalisation de l'invention, dans laquelle les éléments communs à ceux précédemment décrits sont désignés par les mêmes repères. Dans cette autre forme de réalisation, l'embiellage est supprimé et remplacé par un second vérin hydraulique 46. Une extrémité du vérin 46 est articulée, autour d'un axe horizontal 47, sur la partie 11 de l'élément de mât intermédiaire 7. L'autre extrémité du vérin 46 est articulée, autour d'un axe horizontal 48, en un point intermédiaire de la longueur de l'élément de mât supérieur 8, relativement proche de la base de cet élément du mât supérieur 8. Dans cette autre forme de réalisation, le second vérin 46 commande la déformation du second quadrilatère 33, indépendamment de la déformation du premier quadrilatère 26 qui, comme précédemment, est commandée par le vérin 27.Figure 6 shows another embodiment of the invention, in which the elements common to those previously described are designated by the same references. In this other embodiment, the connecting rod is deleted and replaced by a second hydraulic cylinder 46. One end of the cylinder 46 is articulated around an axis horizontal 47, on part 11 of the mast element intermediate 7. The other end of the cylinder 46 is articulated, around a horizontal axis 48, at a point intermediate the length of the upper mast element 8, relatively close to the base of this element of the mast superior 8. In this other embodiment, the second cylinder 46 controls the deformation of the second quadrilateral 33, regardless of the deformation of the first quadrilateral 26 which, as before, is controlled by cylinder 27.

    L'on ne s'éloignerait pas du cadre de l'invention :

    • en remplaçant les deux haubans parallèles 23 par un seul hauban, ou par deux haubans entretoisés ;
    • en modifiant la position du vérin 27, qui au lieu d'être situé à l'avant de l'élément de mât inférieur 6 (et sous cet élément en position repliée de transport) peut aussi être disposé derrière l'élément de mât inférieur 6 (et au-dessus de cet élément en position repliée de transport), encore une autre possibilité consistant en ce que le vérin unique, ou premier vérin 27 selon le cas, est articulé sur un prolongement de l'élément de mât inférieur 6, s'étendant au-delà de l'axe d'articulation 4 de cet élément de mât 6 sur le châssis tournant 3 ;
    • en utilisant la mâture pliable en trois éléments, telle que décrite précédemment, sur une grue dont la flèche, non directement concernée par la présente invention, présenterait une structure et un mode de pliage différents de ceux-ci décrits et illustrés ;
    • en appliquant l'invention à une grue montée pour son transport non pas sur un camion porteur, mais directement sur des essieux, ou sur une remorque, ou sur tout autre moyen de transport roulant ou non tel que wagon, conteneur, etc ...
    We would not depart from the scope of the invention:
    • replacing the two parallel guy lines 23 with a single guy line, or with two braced stays;
    • by modifying the position of the jack 27, which instead of being located at the front of the lower mast element 6 (and under this element in the folded transport position) can also be arranged behind the lower mast element 6 (and above this element in the folded transport position), yet another possibility consisting in that the single cylinder, or first cylinder 27 as the case may be, is articulated on an extension of the lower mast element 6, s 'extending beyond the hinge axis 4 of this mast element 6 on the rotating frame 3;
    • using the foldable mast in three elements, as described above, on a crane whose jib, not directly concerned with the present invention, would have a structure and a folding mode different from those described and illustrated;
    • by applying the invention to a crane mounted for its transport not on a carrier truck, but directly on axles, or on a trailer, or on any other means of transport, whether rolling or not such as a wagon, container, etc.

    Claims (7)

    Mâture pliable pour grue à tour, caractérisée en ce qu'elle est réalisée en trois éléments (6,7,8) avec : un élément de mât inférieur (6) articulé par sa base (en 4) sur le châssis tournant (3) de la grue, un élément de mât intermédiaire de pliage (7), de relativement faible longueur, articulé (en 9) au sommet de l'élément de mât inférieur (6), et un élément de mât supérieur (8), articulé à sa base (en 10) sur l'élément de mât intermédiaire (7), et portant à son sommet la flèche (13) de la grue, cette mâture (5) en trois éléments (6,7,8) comportant un dispositif de pliage/dépliage comprenant lui-même : au moins un hauban (23) articulé par une extrémité (en 24) au châssis tournant (3) et par son autre extrémité (en 25) à l'élément intermédiaire de pliage (7) du mât (5), un tirant (30) articulé par une extrémité (en 31) à l'élément intermédiaire de pliage (7) du mât (5) et, par son autre extrémité (en 21), à un poinçon (19) porté par la flèche (13), et des moyens moteurs (27 ,34 ou 46) servant à déformer, d'une part, le quadrilatère déformable inférieur (26) ayant pour sommets l'axe d'articulation (4) de l'élément de mât inférieur (6) sur le châssis tournant (3), l'axe d'articulation (9) de l'élément de mât intermédiaire (7) avec l'élément de mât inférieur (6), l'axe d'articulation (25) du ou des haubans (23) à l'élément de mât intermédiaire (7) et l'axe d'articulation (24) du ou des haubans (23) au châssis tournant (3), et d'autre part, le quadrilatère déformable supérieur (33) ayant pour sommets l'axe d'articulation (10) de l'élément de mât supérieur (8) avec l'élément de mât intermédiaire (7), l'axe d'articulation (14) de la flèche (13) au sommet de l'élément de mât supérieur (8), l'axe d'articulation (21) du tirant précité (30) au poinçon de flèche (19) et l'axe d'articulation (31) de ce tirant (30) à l'élément de mât intermédiaire (7). Foldable mast for tower crane, characterized in that it is made in three elements (6,7,8) with: a lower mast element (6) articulated by its base (at 4) on the rotating chassis (3) of the crane, an intermediate folding mast element (7), of relatively short length, articulated (at 9) at the top of the lower mast element (6), and an upper mast element (8), articulated at its base (at 10) on the intermediate mast element (7), and carrying at its top the boom (13) of the crane, this mast (5) in three elements (6,7,8) comprising a folding / unfolding device itself comprising: at least one guy (23) articulated by one end (at 24) to the rotating frame (3) and by its other end (at 25) to the intermediate folding element (7) of the mast (5), a tie rod (30) articulated by one end (at 31) to the intermediate folding element (7) of the mast (5) and, by its other end (at 21), to a punch (19) carried by the arrow ( 13), and motor means (27, 34 or 46) serving to deform, on the one hand, the lower deformable quadrilateral (26) having for its tops the articulation axis (4) of the lower mast element (6) on the rotating frame (3), the articulation axis (9) of the intermediate mast element (7) with the lower mast element (6), the articulation axis (25) of the shroud (s) ( 23) to the intermediate mast element (7) and the articulation axis (24) of the shroud (s) (23) to the rotating frame (3), and on the other hand, the upper deformable quadrilateral (33) having for vertices the articulation axis (10) of the upper mast element (8) with the intermediate mast element (7), the articulation axis (14) of the arrow (13) at the top of the upper mast element (8), the hinge pin (21) of the aforementioned tie rod (30) to the arrow punch (19) and the hinge pin (31) of this tie rod (30) to the 'intermediate mast element (7). Mâture pliable en trois éléments pour grue à tour selon la revendication 1, caractérisée en ce que l'élément de mât intermédiaire (7) présente une allure triangulaire, dont le sommet éloigné de l'axe longitudinal (12) dudit élément de mât intermédiaire (7) sert de point d'attache et d'articulation (25) pour le ou les haubans (23), et aussi de point d'attache et d'articulation inférieur (31) pour le tirant (30).Foldable mast in three elements for crane tower according to claim 1, characterized in that the intermediate mast element (7) has a shape triangular, the apex of which is distant from the longitudinal axis (12) of said intermediate mast element (7) serves as a point attachment and articulation (25) for the shroud (s) (23), and also of attachment and articulation point lower (31) for the tie rod (30). Mâture pliable en trois éléments pour grue à tour selon la revendication 1 ou 2, caractérisée en ce que les moyens de motorisation, assurant le dépliage et le repliage de cette mâture (5) en trois éléments (6,7,8), comprennent en combinaison : d'une part, un vérin unique (27) articulé par une extrémité (en 28) au châssis tournant (3) et, par son autre extrémité (en 29), à l'élément de mât inférieur (6), et d'autre part, un embiellage (34) lié de façon articulée à l'élément de mât intermédiaire (7), à la partie supérieure de l'élément de mât inférieur (6) et à la partie inférieure de l'élément de mât supérieur (8). Mast foldable in three elements for tower crane according to claim 1 or 2, characterized in that the motor means, ensuring the unfolding and folding of this mast (5) into three elements (6,7,8), include combination : on the one hand, a single jack (27) articulated by one end (at 28) to the rotating frame (3) and, by its other end (at 29), to the lower mast element (6), and on the other hand, a connecting rod (34) hingedly linked to the intermediate mast element (7), to the upper part of the lower mast element (6) and to the lower part of the mast element upper (8). Mâture pliable en trois éléments pour grue à tour selon la revendication 3, caractérisée en ce que l'embiellage (34) est composé : d'un levier coudé (35) articulé (en 36), dans la région de son coude, à l'élément de mât intermédiaire (7), d'une bielle (37) articulée par une extrémité (en 38) à un point de la partie supérieure de l'élément de mât inférieur (6), et par son autre extrémité (en 39) à un bras du levier coudé (35), et d'une autre bielle (40) articulée par une extrémité (en 41) à un point de la partie inférieure de l'élément de mât supérieur (8), et par son autre extrémité (en 42) à l'autre bras du levier coudé (35). Mast foldable in three elements for tower crane according to claim 3, characterized in that the linkage (34) is composed: a bent lever (35) articulated (at 36), in the region of its elbow, to the intermediate mast element (7), a connecting rod (37) articulated by one end (at 38) to a point on the upper part of the lower mast element (6), and by its other end (at 39) to an arm of the bent lever (35 ), and another connecting rod (40) articulated by one end (at 41) at a point on the lower part of the upper mast element (8), and by its other end (at 42) at the other arm of the lever angled (35). Mâture pliable en trois éléments pour grue à tour selon la revendication 1 ou 2, caractérisée en ce que les moyens de motorisation, assurant le dépliage et le repliage de cette mâture (5) en trois éléments (6,7,8), comprennent en combinaison : un premier vérin (27) articulé par une extrémité (en 28) au châssis tournant (3) et, par son autre extrémité (en 29), à l'élément de mât inférieur (6), et un second vérin (46) articulé par une extrémité (en 47) à l'élément de mât intermédiaire (7) et, par son autre extrémité, à un point intermédiaire (48) de la longueur de l'élément de mât supérieur (8). Mast foldable in three elements for tower crane according to claim 1 or 2, characterized in that the motor means, ensuring the unfolding and folding of this mast (5) into three elements (6,7,8), include combination : a first jack (27) articulated at one end (at 28) to the rotating frame (3) and, at its other end (at 29), to the lower mast element (6), and a second cylinder (46) articulated at one end (at 47) to the intermediate mast element (7) and, at its other end, to an intermediate point (48) of the length of the upper mast element (8 ). Mâture pliable en trois éléments pour grue à tour selon l'une quelconque des revendications 3 à 5, caractérisée en ce que le vérin unique, ou premier vérin (27) selon le cas, est articulé en un point intermédiaire (29) de la longueur de l'élément de mât inférieur (6), ce vérin (27) étant situé devant ou derrière l'élément de mât inférieur (6).Foldable mast in three elements for crane tower according to any one of claims 3 to 5, characterized in that the single cylinder, or first cylinder (27) as appropriate, is articulated at an intermediate point (29) of the length of the lower mast element (6), this cylinder (27) being located in front of or behind the mast element lower (6). Mâture pliable en trois éléments pour grue à tour selon l'une quelconque des revendications 3 à 5, caractérisée en ce que le vérin unique, ou premier vérin (27) selon le cas, est articulé sur un prolongement de l'élément de mât inférieur (6), s'étendant au-delà de l'axe d'articulation (4) de cet élément de mât (6) sur le châssis tournant (3).Foldable mast in three elements for crane tower according to any one of claims 3 to 5, characterized in that the single cylinder, or first cylinder (27) as applicable, is articulated on an extension of the lower mast element (6), extending beyond the hinge pin (4) of this mast element (6) on the rotating frame (3).
    EP19980420106 1997-07-02 1998-06-25 Mast foldable in three elements with folding/unfolding device for tower crane Expired - Lifetime EP0888997B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9708621A FR2765564B1 (en) 1997-07-02 1997-07-02 MATURE FOLDABLE IN THREE ELEMENTS WITH FOLDING / FOLDING DEVICE FOR TOWER CRANE
    FR9708621 1997-07-02

    Publications (2)

    Publication Number Publication Date
    EP0888997A1 true EP0888997A1 (en) 1999-01-07
    EP0888997B1 EP0888997B1 (en) 2003-01-29

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    Application Number Title Priority Date Filing Date
    EP19980420106 Expired - Lifetime EP0888997B1 (en) 1997-07-02 1998-06-25 Mast foldable in three elements with folding/unfolding device for tower crane

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    EP (1) EP0888997B1 (en)
    JP (1) JP4212069B2 (en)
    DE (1) DE69811002T2 (en)
    ES (1) ES2190576T3 (en)
    FR (1) FR2765564B1 (en)
    RU (1) RU2193007C2 (en)

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    FR2792627A1 (en) * 1999-04-23 2000-10-27 Potain Sa CRANE WITH MULTI-FUNCTION BOOM
    EP1352870A1 (en) * 2002-04-12 2003-10-15 Potain Device for erecting and unfolding the mast and for erecting the jib of a crane
    EP1364906A1 (en) * 2002-05-21 2003-11-26 Potain Tower crane with foldable counter-jib
    CN109761153A (en) * 2019-01-26 2019-05-17 湖南维尔力德科技有限公司 The stacker crane body of foldable telescopic arm
    US20210261388A1 (en) * 2018-06-27 2021-08-26 Tadano Demag Gmbh Vehicle crane comprising a movable adapter between the main boom and the main boom extension

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    DE102008013990A1 (en) * 2008-03-13 2009-09-17 Putzmeister Concrete Pumps Gmbh Articulated mast for arrangement at chassis of truck for e.g. movable concrete pump, has framework with operating bars hinged at operating joints and lever, and adjustable in length under formation of one of drive aggregates
    DE102009005237A1 (en) * 2009-01-21 2010-07-29 Liebherr-Werk Biberach Gmbh Tower Crane
    AT12086U1 (en) * 2010-06-17 2011-10-15 Palfinger Ag VEHICLE CRANE
    JP6085493B2 (en) * 2013-02-15 2017-02-22 株式会社東京Bk足場 Tower crane
    CN105417408B (en) * 2015-12-21 2017-05-10 太原重工股份有限公司 Attached type folding arm crane and mounting method thereof
    NL2019511B1 (en) * 2017-09-08 2019-03-19 Mammoet Eng B V Crane comprising first mast with tiltable first mast upper part

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    FR2792627A1 (en) * 1999-04-23 2000-10-27 Potain Sa CRANE WITH MULTI-FUNCTION BOOM
    EP1048605A1 (en) * 1999-04-23 2000-11-02 Potain Multiple function crane with telescope jib
    US6439408B1 (en) 1999-04-23 2002-08-27 Potain Crane with jib having multiple functions
    EP1352870A1 (en) * 2002-04-12 2003-10-15 Potain Device for erecting and unfolding the mast and for erecting the jib of a crane
    FR2838415A1 (en) * 2002-04-12 2003-10-17 Potain Sa DEVICE FOR LIFTING AND FILLING THE MAT AND TILTING THE ARROW OF A CRANE
    US6991120B2 (en) * 2002-04-12 2006-01-31 Potain Device for raising and unfolding the mast and for raising the jib of a crane
    EP1364906A1 (en) * 2002-05-21 2003-11-26 Potain Tower crane with foldable counter-jib
    FR2839962A1 (en) * 2002-05-21 2003-11-28 Potain Sa TOWER CRANE WITH FOLDING COUNTER
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    US20210261388A1 (en) * 2018-06-27 2021-08-26 Tadano Demag Gmbh Vehicle crane comprising a movable adapter between the main boom and the main boom extension
    US11702324B2 (en) * 2018-06-27 2023-07-18 Tadano Demag Gmbh Vehicle crane comprising a movable adapter between the main boom and the main boom extension
    CN109761153A (en) * 2019-01-26 2019-05-17 湖南维尔力德科技有限公司 The stacker crane body of foldable telescopic arm

    Also Published As

    Publication number Publication date
    EP0888997B1 (en) 2003-01-29
    JP4212069B2 (en) 2009-01-21
    DE69811002D1 (en) 2003-03-06
    FR2765564B1 (en) 1999-08-27
    FR2765564A1 (en) 1999-01-08
    ES2190576T3 (en) 2003-08-01
    RU2193007C2 (en) 2002-11-20
    JPH1171093A (en) 1999-03-16
    DE69811002T2 (en) 2003-10-16

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