EP1352870B1 - Device for erecting and unfolding the mast and for erecting the jib of a crane - Google Patents

Device for erecting and unfolding the mast and for erecting the jib of a crane Download PDF

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Publication number
EP1352870B1
EP1352870B1 EP03356043A EP03356043A EP1352870B1 EP 1352870 B1 EP1352870 B1 EP 1352870B1 EP 03356043 A EP03356043 A EP 03356043A EP 03356043 A EP03356043 A EP 03356043A EP 1352870 B1 EP1352870 B1 EP 1352870B1
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EP
European Patent Office
Prior art keywords
mast
articulated
jib
jack
rod
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Expired - Lifetime
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EP03356043A
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German (de)
French (fr)
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EP1352870A1 (en
Inventor
Aimé Gaillard
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Manitowoc Crane Group France SAS
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Potain SA
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    • 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
    • B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks

Definitions

  • the present invention relates to lifting or handling equipment, and more particularly cranes.
  • This invention relates, more specifically, to a motorized device for lifting and unfolding the mast and lifting the boom of a crane, and even more particularly a crane with multi-function boom as described by the document FR 2792627 A in the name of the Applicant.
  • This document relates to a crane configuration changeable, which comprises a mast mounted on a frame, and a distributing arrow composed of successive elements articulated together about horizontal axes, the first boom element said arrow foot being itself even articulated around a horizontal axis at the top of the mast.
  • This first boom element, and possibly the next element can be brought in a substantially vertical position, in alignment with the erected mast, so as to raise this mast. All boom elements have a raceway for the same carriage.
  • the crane can be used as a long or shortened, horizontal or inclined distributor crane, or as a "gooseneck" boom crane, depending on the configuration of the boom elements, the height of the crane being also adjustable according to the number of boom elements brought into the extension of the mast.
  • the mast can itself be foldable and usable in several positions, the various configurations of the boom elements can thus be combined with the variable configurations of the mast.
  • the foldable mast is composed of two mast elements, namely a lower mast member hinged to the crane frame, and an upper mast member hinged to the top of the lower mast member.
  • the lower mast element is in particular articulated on a rotating frame, orientable about a vertical axis on a base frame, mounted on wheels, the crane can thus be presented as a self-propelled crane.
  • the aforementioned document provides devices with cylinder, or cylinder and linkage. This results in a multiplicity of jacks and linkages, given the total number of joints to motorize.
  • the motorized lifting and unfolding device comprises a jack located between the two elements of the mast, and articulated on the one hand on the lower part of the lower mast element, on the other hand on the lower part of the upper mast element via a crankshaft.
  • the unfolding of the mast is achieved using this linkage.
  • the lifting of the boom is achieved by means of a tie rod connected on the one hand to a fixed point of the rotating frame of the crane, and on the other hand to a fixed point of the boom.
  • the present invention aims to avoid the aforementioned disadvantages, by providing an improved device for lifting and unfolding the mast and lifting the boom of a crane, more particularly adapted to a crane with multi-function boom, this device comprising a number a minimum of cylinders that can be used both for lifting-unfolding and for working the crane, while allowing various configurations of this crane, while having a small footprint, in particular to reduce the height of the crane in the folded transport position.
  • the subject of the invention is a motorized device for raising and unfolding the mast and for lifting the boom of a crane of the type concerned, this device essentially comprising a double-acting hydraulic cylinder, the two ends of which are connected respectively has a lower linkage and upper linkage, the lower linkage for raising and unfolding the mast being also connected to the lower part of the upper mast element and the upper part of the lower mast element, and the connecting rod assembly upper device for raising the boom and moving it in various working positions being also connected to the upper part of the upper mast element and to the foot of boom, the device further comprising at least one stay connecting the lower part of the mast element greater than a point of the frame of the crane on which is articulated the lower part of the lower mast element, and locking means of the lower end of the aforementioned cylinder, in at least two distinct positions, on the lower part of the upper mast element, and finally a stop located in the upper part of the upper mast element and intended to cooperate with the upper linkage.
  • the inventive idea is to provide a single cylinder, associated with two linkages to achieve both the functions of unfolding-folding the mast, lifting-lowering of the boom, and work in "flight of arrow", c that is to say with a movement of raising the boom.
  • the two locking positions of the cylinder are involved, respectively, in the "unfolded mast” position and in the "folded mast” position.
  • the proposed system has a simple and safe kinematics: it involves neither combination of movements, nor manual intervention in its operation. It also provides complete independence of the movements and positions of the mast and the boom, allowing all possible configurations, in particular from a position with a substantially horizontal folded mast, or a position with a substantially vertical unfolded mast.
  • the need for a single cylinder for various movements or functions also leads to an economic realization. Furthermore, the cylinder is not positioned between the two mast members when they are folded, but it rests on the upper mast element, which increases the viewing angle of the driver from his cabin .
  • the lower linkage comprises a first connecting rod, preferably a double rod, articulated at one of its ends to the corresponding end of the jack, hinged at an intermediate point to the lower part of the upper mast element, and hinged at its other end at one end of a secnde connecting rod, preferably a double rod, itself articulated at its other end to the upper part of the lower mast element.
  • the upper linkage it advantageously comprises a bent rod, preferably a double rod, articulated at one of its ends to the upper part of the upper mast member and hinged at its other end, to both at the corresponding end of the cylinder and at one end of another rod, preferably a single rod, the other end is articulated to the foot of arrow.
  • the cranked rod here allows the upper linkage to "bypass" the articulation of the arrow foot at the top of the mast.
  • the purpose of the interlocks is not to introduce unnecessary stresses in the lower linkage, in particular by preventing the rotation of the first link (at three points) of this linkage in the folded transport position.
  • the main cylinder not only allows the lifting of the mast and the jib foot, during the initial installation of the crane, but also obtaining all intermediate jib positions, by ordering the more or less significant output of the rod of this cylinder.
  • the boom itself consists of two or more elements, articulated together, the unfolding of these boom elements relative to each other is obtained by an auxiliary motor, in particular by jack and linkage, not directly concerned. by the present invention.
  • the crane shown in the drawing in various positions, has a base carrier frame 1, mounted on wheels 2 and provided with stabilizers 3. On the base frame 1 is mounted a rotating frame 4, orientable about a vertical axis 5, and provided with a driving cabin 6 on one of its sides.
  • a folding mast 7, composed of a lower mast member 8 and an upper mast member 9, each of polygonal section and box structure.
  • the lower mast element 8 is articulated by its base, around a horizontal axis 10, on a lower part of the rotating frame 4.
  • the upper mast element 9 is articulated by its base, around a horizontal axis 12 at the top of the mast element lower 8, this intermediate articulation of the mast 7 allowing a relative pivoting of the elements 8 and 9 on an angle of about 180 °.
  • the folding mast 7 is held by a double guy 13, which connects the base of the upper mast member 9 to the upper part of the rotating frame 4.
  • the folding mast 7 carries a distributing arrow 14, which is composed of three successive arrow elements 15, 16 and 17, each of box structure, all of which comprise, at their lower face, a path of bearing 18 for an arrow cart 19.
  • the second boom element 16 is articulated by its rear end, about a horizontal axis 21, to the front end of the boom foot 15.
  • the crane is provided with a motorized device, designated generally by 23, for raising and unfolding its mast 7 and raising its boom 14.
  • the device 23 comprises a hydraulic cylinder 24, a lower linkage 25 and an upper linkage 26 .
  • the hydraulic cylinder 24, which is a double-acting cylinder, has a body 27 whose end is connected to the lower linkage 25, and a rod 28 whose end is connected to the upper linkage 26.
  • the double rod 33 is hinged about an axis 34 on the upper part of the lower mast element 8.
  • the simple connecting rod 38 is articulated at its other end, about an axis 39, with the jib foot 15.
  • the device 23 also comprises a locking system 40 of the lower end of the jack 24, hence the end of the body 27 of the jack 24, this locking system 40 being located at the base of the upper mast element 9 , and being shown more particularly in FIGS. 12 to 14.
  • the locking system 40 further comprises a guide assembly, consisting of two parallel slides 47 and 48, carried by the upper mast element 9 and also extending parallel to this mast element 9.
  • the two slides 47 and 48 are provided with matching pinholes, which comprise on the one hand a pair of lower pinholes 49, and on the other hand a pair of upper pinholes 50.
  • the two pins 44 and 45 of the lock 41 are provided to be engaged in the lower broaching holes 49 (in the "folded mast” position), or in the upper broaching holes 50 (in the "unfolded mast” position), the cylinder head 42 being movably mounted between the two slides 47 and 48.
  • the device 23 comprises a stop 51, located at the top of the upper mast element 9 (see FIGS. 2 and 3), and cooperating with the upper linkage 26, more particularly with the double cranked rod 35, so as to stopping rotation of this rod 35 in certain phases of operation.
  • the operation of the device 23 is established as follows, starting from the folded crane transport position (FIG. 1):
  • the two mast elements 8 and 9 have then come into abutment against each other, by means of support plates situated respectively at the top of the lower mast element 8 and at the base of the element. 9. These two mast elements 8 and 9 are thus stopped in aligned position. The arrow 14 remains, until then, folded against the mast 7.
  • the jack 24 is controlled in the direction of the output of its rod 28, which actuates the upper linkage 26 and causes the lifting of the jib foot 15, to a substantially horizontal position, in fact a position slightly inclined upwards (for example at an angle of about 5 °) - see figure 5.
  • the intermediate element 16 of the boom 14, and the boom tip 17, then remain folded over the boom foot 15.
  • the lifting and unfolding operations of the mast 7 and the boom 14, and the reverse folding and lowering operations are performed according to an automatic cycle, driven by a control unit comprising a computer.
  • This triggers the succession of movement commands, taking into account the information provided by a set of sensors, for example force, position and speed sensors, to perform a preprogrammed movement cycle of which each phase is controlled by sensors that allow or not the control of the next phase.
  • the crane can still be used in another configuration, illustrated in Figure 9, in which its mast 7 is partially unfolded, and supported on the rotating frame via a rear stand 52.
  • This configuration allows a distribution of loads associated with a possibility of displacement of the base carrier frame 1, for example for the loading and unloading of trucks.
  • the longitudinal axis of the boom 14 is advantageously offset laterally with respect to the longitudinal axis of the mast 7, and also with respect to the device 23, the boom foot 15 being thus located on the side of the upper linkage 26.
  • the simple connecting rod 38 of the upper linkage 26 is articulated about an axis 39 secured to the clevises of a cross member 53 laterally welded to the boom foot 15. Due to this lateral offset, an additional gain in lateral visibility is obtained for the driver posted in the driver's cab 6 when the crane is in the folded transport position.

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

Description

La présente invention concerne les engins de levage ou de manutention, et plus particulièrement les grues. Cette invention se rapporte, plus spécifiquement, à un dispositif motorisé de relevage et dépliage du mât et de relevage de la flèche d'une grue, et encore plus particulièrement d'une grue avec flèche à fonctions multiples telle que décrite par le document FR 2792627 A au nom du Demandeur.The present invention relates to lifting or handling equipment, and more particularly cranes. This invention relates, more specifically, to a motorized device for lifting and unfolding the mast and lifting the boom of a crane, and even more particularly a crane with multi-function boom as described by the document FR 2792627 A in the name of the Applicant.

Ce document a pour objet une grue à configuration modifiable, qui comprend un mât monté sur un châssis, et une flèche distributrice composée d'éléments successifs articulés entre eux autour d'axes horizontaux, le premier élément de flèche dit pied de flèche étant lui-même articulé autour d'un axe horizontal au sommet du mât. Ce premier élément de flèche, et éventuellement l'élément suivant, peuvent être amenés en position sensiblement verticale, dans l'alignement du mât dressé, de manière à rehausser ce mât. Tous les éléments de flèche comportent un chemin de roulement pour un même chariot. Ainsi, la grue peut être utilisée comme une grue à flèche distributrice longue ou raccourcie, horizontale ou inclinée, ou encore comme une grue à flèche en "col de cygne", selon la configuration des éléments de flèche, la hauteur de la grue étant aussi modulable selon le nombre d'éléments de flèche amenés dans le prolongement du mât.This document relates to a crane configuration changeable, which comprises a mast mounted on a frame, and a distributing arrow composed of successive elements articulated together about horizontal axes, the first boom element said arrow foot being itself even articulated around a horizontal axis at the top of the mast. This first boom element, and possibly the next element, can be brought in a substantially vertical position, in alignment with the erected mast, so as to raise this mast. All boom elements have a raceway for the same carriage. Thus, the crane can be used as a long or shortened, horizontal or inclined distributor crane, or as a "gooseneck" boom crane, depending on the configuration of the boom elements, the height of the crane being also adjustable according to the number of boom elements brought into the extension of the mast.

Dans une telle grue avec flèche à fonctions multiples, le mât peut lui-même être dépliable et utilisable en plusieurs positions, les diverses configurations des éléments de flèche pouvant ainsi être combinées avec les configurations variables du mât. En particulier, le mât repliable est composé de deux éléments de mât, à savoir un élément de mât inférieur articulé sur le châssis de la grue, et un élément de mât supérieur articulé au sommet de l'élément de mât inférieur. L'élément de mât inférieur est notamment articulé sur un châssis tournant, orientable autour d'un axe vertical sur un châssis de base, monté sur roues, la grue pouvant ainsi se présenter comme un engin roulant autonome.In such a multi-function boom crane, the mast can itself be foldable and usable in several positions, the various configurations of the boom elements can thus be combined with the variable configurations of the mast. In particular, the foldable mast is composed of two mast elements, namely a lower mast member hinged to the crane frame, and an upper mast member hinged to the top of the lower mast member. The lower mast element is in particular articulated on a rotating frame, orientable about a vertical axis on a base frame, mounted on wheels, the crane can thus be presented as a self-propelled crane.

Pour la motorisation des différentes articulations d'une telle grue, le document précité prévoit des dispositifs à vérin, ou à vérin et embiellage. Il en résulte une multiplicité de vérins et d'embiellages, compte tenu du nombre total d'articulations à motoriser.For the motorization of the various joints of such a crane, the aforementioned document provides devices with cylinder, or cylinder and linkage. This results in a multiplicity of jacks and linkages, given the total number of joints to motorize.

Comme autre exemple connu de motorisation du dépliage d'une grue repliable, on peut citer aussi le document FR 2682096 A au nom du Demandeur. Ce document concerne une grue qui comprend un mât pliable en deux éléments et une flèche en deux éléments principaux. Pour une telle structure de grue, le dispositif motorisé de relevage et de dépliage comprend un vérin situé entre les deux éléments du mât, et articulé d'une part sur la partie inférieure de l'élément de mât inférieur, d'autre part sur la partie inférieure de l'élément de mât supérieur par l'intermédiaire d'un embiellage. Le dépliage du mât est réalisé à l'aide de cet embiellage. Le relevage de la flèche est réalisé à l'aide d'un tirant relié d'une part à un point fixe du châssis tournant de la grue, et d'autre part à un point fixe de la flèche.As another known example of motorization of the unfolding of a folding crane, one can also cite the document FR 2682096 A in the name of the Applicant. This document concerns a crane that includes a folding mast in two elements and an arrow in two main elements. For such a crane structure, the motorized lifting and unfolding device comprises a jack located between the two elements of the mast, and articulated on the one hand on the lower part of the lower mast element, on the other hand on the lower part of the upper mast element via a crankshaft. The unfolding of the mast is achieved using this linkage. The lifting of the boom is achieved by means of a tie rod connected on the one hand to a fixed point of the rotating frame of the crane, and on the other hand to a fixed point of the boom.

Une telle technique conserve divers inconvénients :

  • Le vérin placé entre les deux éléments de mât possède un encombrement important, qui est gênant notamment dans la position repliée de transport de la grue.
  • Les mouvements de relevage-dépliage du mât et de relevage de la flèche sont simultanés, et ne permettent pas de changement de configuration durant le travail de la grue, la configuration de travail étant obligatoirement pré-définie avant relevage et dépliage de la grue.
  • De toute façon, partant de cette conception de grue, on doit prévoir deux systèmes de motorisation, à savoir : un système pour le relevage et dépliage du mât et le relevage de la flèche, puisque ces mouvements sont associés, et un système pour le dépliage de la flèche, et le dispositif ici considéré n'est pas directement applicable à une grue avec flèche à fonctions multiples.
Such a technique retains various disadvantages:
  • The jack placed between the two mast elements has a large size, which is particularly troublesome in the folded transport position of the crane.
  • The movements of lifting-unfolding of the mast and lifting boom are simultaneous, and do not allow configuration change during the work of the crane, the work configuration is necessarily pre-defined before lifting and unfolding the crane.
  • Anyway, starting from this design of crane, one must provide two systems of motorization, namely: a system for the raising and unfolding of the mast and the raising of the boom, since these movements are associated, and a system for the unfolding of the boom, and the device here considered is not directly applicable to a crane with multi-function boom.

La présente invention vise à éviter les inconvénients précédemment exposés, en fournissant un dispositif perfectionné de relevage et dépliage du mât et de relevage de la flèche d'une grue, plus particulièrement adapté à une grue avec flèche à fonctions multiples, ce dispositif comprenant un nombre minimum de vérins utilisables tant pour le relevage-dépliage que pour le travail de la grue, en permettant des configurations diverses de cette grue, tout en possédant un faible encombrement notamment pour réduire la hauteur de la grue en position repliée de transport.The present invention aims to avoid the aforementioned disadvantages, by providing an improved device for lifting and unfolding the mast and lifting the boom of a crane, more particularly adapted to a crane with multi-function boom, this device comprising a number a minimum of cylinders that can be used both for lifting-unfolding and for working the crane, while allowing various configurations of this crane, while having a small footprint, in particular to reduce the height of the crane in the folded transport position.

A cet effet, l'invention a pour objet un dispositif motorisé de relevage et dépliage du mât et de relevage de la flèche d'une grue du genre concerné, ce dispositif comprenant essentiellement un vérin hydraulique à double effet dont les deux extrémités sont reliées respectivement à un embiellage inférieur et à un embiellage supérieur, l'embiellage inférieur destiné à relever et déplier le mât étant relié aussi à la partie inférieure de l'élément de mât supérieur et à la partie supérieure de l'élément de mât inférieur, et l'embiellage supérieur destiné à relever la flèche et à la mouvoir dans diverses positions de travail étant relié aussi à la partie supérieure de l'élément de mât supérieur et au pied de flèche, le dispositif comprenant encore au moins un hauban reliant la partie inférieure de l'élément de mât supérieur à un point du châssis de la grue sur lequel est articulée la partie inférieure de l'élément de mât inférieur, et des moyens de verrouillage de l'extrémité inférieure du vérin précité, en au moins deux positions distinctes, sur la partie inférieure de l'élément de mât supérieur, et enfin une butée située dans la partie supérieure de l'élément de mât supérieur et prévue pour coopérer avec l'embiellage supérieur.For this purpose, the subject of the invention is a motorized device for raising and unfolding the mast and for lifting the boom of a crane of the type concerned, this device essentially comprising a double-acting hydraulic cylinder, the two ends of which are connected respectively has a lower linkage and upper linkage, the lower linkage for raising and unfolding the mast being also connected to the lower part of the upper mast element and the upper part of the lower mast element, and the connecting rod assembly upper device for raising the boom and moving it in various working positions being also connected to the upper part of the upper mast element and to the foot of boom, the device further comprising at least one stay connecting the lower part of the mast element greater than a point of the frame of the crane on which is articulated the lower part of the lower mast element, and locking means of the lower end of the aforementioned cylinder, in at least two distinct positions, on the lower part of the upper mast element, and finally a stop located in the upper part of the upper mast element and intended to cooperate with the upper linkage.

Ainsi, l'idée inventive consiste à prévoir un unique vérin, associé à deux embiellages pour réaliser à la fois les fonctions de dépliage-repliage du mât, de relevage-abaissement de la flèche, et de travail en "volée de flèche", c'est-à-dire avec un mouvement de relevage de la flèche. Les deux positions de verrouillage du vérin interviennent, respectivement, dans la position "mât déplié" et dans la position "mât replié". Le système proposé possède une cinématique simple et sûre : il n'implique ni combinaison de mouvements, ni intervention manuelle dans son fonctionnement. Il procure aussi une totale indépendance des mouvements et positions du mât et de la flèche, permettant toutes configurations possibles, notamment à partir d'une position avec mât replié sensiblement horizontal, ou d'une position avec mât déplié sensiblement vertical.Thus, the inventive idea is to provide a single cylinder, associated with two linkages to achieve both the functions of unfolding-folding the mast, lifting-lowering of the boom, and work in "flight of arrow", c that is to say with a movement of raising the boom. The two locking positions of the cylinder are involved, respectively, in the "unfolded mast" position and in the "folded mast" position. The proposed system has a simple and safe kinematics: it involves neither combination of movements, nor manual intervention in its operation. It also provides complete independence of the movements and positions of the mast and the boom, allowing all possible configurations, in particular from a position with a substantially horizontal folded mast, or a position with a substantially vertical unfolded mast.

La nécessité d'un seul vérin pour divers mouvements ou fonctions conduit aussi à une réalisation économique. Par ailleurs, le vérin ne se trouve pas positionné entre les deux éléments de mât lorsque ceux-ci sont repliés, mais il repose sur l'élément de mât supérieur, ce qui permet d'accroître l'angle de vision du conducteur depuis sa cabine.The need for a single cylinder for various movements or functions also leads to an economic realization. Furthermore, the cylinder is not positioned between the two mast members when they are folded, but it rests on the upper mast element, which increases the viewing angle of the driver from his cabin .

Selon une forme de réalisation du dispositif objet de l'invention, l'embiellage inférieur comprend une première bielle, de préférence une bielle double, articulée à l'une de ses extrémités à l'extrémité correspondante du vérin, articulée en un point intermédiaire à la partie inférieure de l'élément de mât supérieur, et articulée à son autre extrémité à une extrémité d'une secnde bielle, de préférence une bielle double, elle-même articulée à son autre extrémité à la partie supérieure de l'élément de mât inférieur.According to one embodiment of the device according to the invention, the lower linkage comprises a first connecting rod, preferably a double rod, articulated at one of its ends to the corresponding end of the jack, hinged at an intermediate point to the lower part of the upper mast element, and hinged at its other end at one end of a secnde connecting rod, preferably a double rod, itself articulated at its other end to the upper part of the lower mast element.

Quant à l'embiellage supérieur, celui-ci comprend avantageusement une bielle coudée, de préférence une bielle double, articulée à l'une des ses extrémités à la partie supérieure de l'élément de mât supérieur et articulée, à son autre extrémité, à la fois à l'extrémité correspondante du vérin et à une extrémité d'une autre bielle, de préférence une bielle simple, dont l'autre extrémité est articulée au pied de flèche. La bielle coudée permet ici à l'embiellage supérieur de "contourner" l'articulation du pied de flèche au sommet du mât.As for the upper linkage, it advantageously comprises a bent rod, preferably a double rod, articulated at one of its ends to the upper part of the upper mast member and hinged at its other end, to both at the corresponding end of the cylinder and at one end of another rod, preferably a single rod, the other end is articulated to the foot of arrow. The cranked rod here allows the upper linkage to "bypass" the articulation of the arrow foot at the top of the mast.

Les moyens de verrouillage de l'extrémité inférieure du vérin sur la partie inférieure de l'élément de mât supérieur comprennent, dans une forme d'exécution particulière :

  • d'une part, à l'extrémité inférieure du vérin, un verrou transversal constitué d'un vérin auxiliaire à double effet, dont le corps et la tige sont respectivement solidaires de deux axes opposés, montés coulissants dans des parties latérales respectives d'une tête du vérin principal, un ressort de sécurité étant prévu pour le maintien du verrou en position active ;
  • d'autre part, sur la partie inférieure de l'élément de mât supérieur, un ensemble de guidage composé de deux glissières parallèles à cet élément de mât, et munies respectivement de trous de brochage inférieurs et supérieurs situées en correspondance, la tête du vérin étant montée déplaçable entre les deux glissières dont les trous de brochage inférieurs sont prévus pour recevoir respectivement les deux axes du verrou dans la position "mât replié", et dont les trous de brochage supérieurs sont prévus pour recevoir respectivement les deux axes du verrou dans la position "mât déplié".
The locking means of the lower end of the jack on the lower part of the upper mast element comprise, in a particular embodiment:
  • on the one hand, at the lower end of the jack, a transverse lock consisting of a double-acting auxiliary jack, whose body and the rod are respectively integral with two opposite axes, slidably mounted in respective lateral parts of a head of the main cylinder, a safety spring being provided for maintaining the lock in the active position;
  • on the other hand, on the lower part of the upper mast element, a guide assembly composed of two rails parallel to this mast element, and respectively provided with corresponding lower and upper pinning holes, the cylinder head being mounted movably between the two slides, the lower pinning holes of which are designed to respectively receive the two pins of the latch in the "folded mast" position, and whose upper pinning holes are provided for respectively receiving the two axes of the latch in the latch. position "unfolded mast".

Les verrouillages ont pour rôle de ne pas introduire de contraintes inutiles dans l'embiellage inférieur, en empêchant notamment la rotation de la première bielle (à trois points) de cet embiellage en position repliée de transport.The purpose of the interlocks is not to introduce unnecessary stresses in the lower linkage, in particular by preventing the rotation of the first link (at three points) of this linkage in the folded transport position.

Le vérin principal permet non seulement le relevage du mât et du pied de flèche, lors de la mise en place initiale de la grue, mais encore l'obtention de toutes positions de flèche intermédiaires, par commande de la sortie plus ou moins importante de la tige de ce vérin. Dans la mesure où la flèche se compose elle-même de deux ou plusieurs éléments, articulés entre eux, le dépliage de ces éléments de flèche les uns par rapport aux autres est obtenu par une motorisation auxiliaire, notamment par vérin et embiellage, non concernée directement par la présente invention.The main cylinder not only allows the lifting of the mast and the jib foot, during the initial installation of the crane, but also obtaining all intermediate jib positions, by ordering the more or less significant output of the rod of this cylinder. Insofar as the boom itself consists of two or more elements, articulated together, the unfolding of these boom elements relative to each other is obtained by an auxiliary motor, in particular by jack and linkage, not directly concerned. by the present invention.

L'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de ce dispositif de relevage et dépliage du mât et de relevage de la flèche d'une grue :

  • Figure 1 est une vue de côté d'une grue équipée du dispositif selon l'invention, en position repliée de transport ;
  • Figures 2, 3, 4, 5 et 6 sont des vues de côté, similaires à la figure 1, illustrant des phases successives du relevage et dépliage du mât et du relevage de la flèche de cette grue ;
  • Figures 7, 8 et 9 sont des vues de côté de la même grue, dans diverses positions de travail ;
  • Figure 10 est une vue de côté du dispositif de relevage et de dépliage selon l'invention, représenté seul et plus en détail, en position repliée ;
  • Figure 11 est une vue en perspective correspondant à la figure 10 ;
  • Figure 12 montre, en perspective, le détail A agrandi de la figure 11 concernant les moyens de verrouillage du vérin ;
  • Figures 13 et 14 sont des vues en coupe de ces moyens de verrouillage, dans deux positions ;
  • Figure 15 est une vue en perspective du dispositif, en position dépliée.
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 example, an embodiment of this device for raising and unfolding the mast and lifting the boom. of a crane:
  • Figure 1 is a side view of a crane equipped with the device according to the invention, in the folded transport position;
  • Figures 2, 3, 4, 5 and 6 are side views, similar to Figure 1, illustrating successive phases of lifting and unfolding of the mast and lifting the boom of the crane;
  • Figures 7, 8 and 9 are side views of the same crane, in various working positions;
  • Figure 10 is a side view of the lifting device and unfolding according to the invention, shown alone and in more detail, in the folded position;
  • Figure 11 is a perspective view corresponding to Figure 10;
  • Figure 12 shows, in perspective, the enlarged detail A of Figure 11 relating to the locking means of the cylinder;
  • Figures 13 and 14 are sectional views of these locking means in two positions;
  • Figure 15 is a perspective view of the device in the unfolded position.

La grue représentée au dessin, dans diverses positions, possède un châssis porteur de base 1, monté roulant sur des roues 2 et pourvu de stabilisateurs 3. Sur le châssis de base 1 est monté un châssis tournant 4, orientable autour d'un axe vertical 5, et pourvu d'une cabine de conduite 6 sur l'un de ses côtés.The crane shown in the drawing, in various positions, has a base carrier frame 1, mounted on wheels 2 and provided with stabilizers 3. On the base frame 1 is mounted a rotating frame 4, orientable about a vertical axis 5, and provided with a driving cabin 6 on one of its sides.

Sur l'autre côté du châssis tournant 4 est monté un mât repliable 7, composé d'un élément de mât inférieur 8 et d'un élément de mât supérieur 9, chacun de section polygonale et de structure en caisson. L'élément de mât inférieur 8 est articulé par sa base, autour d'un axe horizontal 10, sur une partie inférieure du châssis tournant 4. L'élément de mât supérieur 9 est articulé par sa base, autour d'un axe horizontal 12, au sommet de l'élément de mât inférieur 8, cette articulation intermédiaire du mât 7 autorisant un pivotement relatif des éléments 8 et 9 sur un angle d'environ 180°.On the other side of the rotating frame 4 is mounted a folding mast 7, composed of a lower mast member 8 and an upper mast member 9, each of polygonal section and box structure. The lower mast element 8 is articulated by its base, around a horizontal axis 10, on a lower part of the rotating frame 4. The upper mast element 9 is articulated by its base, around a horizontal axis 12 at the top of the mast element lower 8, this intermediate articulation of the mast 7 allowing a relative pivoting of the elements 8 and 9 on an angle of about 180 °.

Le mât repliable 7 est maintenu par un hauban double 13, qui relie la base de l'élément de mât supérieur 9 à la partie supérieure du châssis tournant 4.The folding mast 7 is held by a double guy 13, which connects the base of the upper mast member 9 to the upper part of the rotating frame 4.

A son sommet, le mât repliable 7 porte une flèche distributrice 14, qui est composée de trois éléments de flèche successifs 15, 16 et 17, chacun de structure en caisson, qui comportent tous trois, au niveau de leur face inférieure, un chemin de roulement 18 pour un chariot de flèche 19.At its apex, the folding mast 7 carries a distributing arrow 14, which is composed of three successive arrow elements 15, 16 and 17, each of box structure, all of which comprise, at their lower face, a path of bearing 18 for an arrow cart 19.

Le premier élément de flèche 15, aussi appelé pied de flèche, est articulé à son extrémité arrière, autour d'un axe horizontal 20, au sommet de l'élément de mât supérieur 9, cette articulation autorisant un pivotement relatif sur un angle d'environ 180°. Le deuxième élément de flèche 16 est articulé par son extrémité arrière, autour d'un axe horizontal 21, à l'extrémité avant du pied de flèche 15. Le troisième élément de flèche 17, aussi désigné comme pointe de flèche, est articulé par son extrémité arrière, autour d'un axe horizontal 22, à l'extrémité avant du deuxième élément de flèche 16.The first boom element 15, also known as the boom foot, is articulated at its rear end, around a horizontal axis 20, at the top of the upper mast element 9, this articulation allowing a relative pivoting on an angle of about 180 °. The second boom element 16 is articulated by its rear end, about a horizontal axis 21, to the front end of the boom foot 15. The third boom element 17, also designated as an arrowhead, is articulated by its rear end, about a horizontal axis 22, at the front end of the second boom member 16.

La grue est pourvue d'un dispositif motorisé, désigné globalement par 23, pour le relevage et dépliage de son mât 7 et le relevage de sa flèche 14. Le dispositif 23 comprend un vérin hydraulique 24, un embiellage inférieur 25 et un embiellage supérieur 26.The crane is provided with a motorized device, designated generally by 23, for raising and unfolding its mast 7 and raising its boom 14. The device 23 comprises a hydraulic cylinder 24, a lower linkage 25 and an upper linkage 26 .

Le vérin hydraulique 24, qui est un vérin à double effet, possède un corps 27 dont l'extrémité est reliée à l'embiellage inférieur 25, et une tige 28 dont l'extrémité est reliée à l'embiellage supérieur 26.The hydraulic cylinder 24, which is a double-acting cylinder, has a body 27 whose end is connected to the lower linkage 25, and a rod 28 whose end is connected to the upper linkage 26.

L'embiellage inférieur 25 comprend une bielle double 29 à trois points, qui est articulée:

  • à l'une de ses extrémités, autour d'un axe 30, avec l'extrémité du corps 27 du vérin 24 ;
  • en un point intermédiaire de sa longueur, autour d'un axe 31, sur la partie inférieure de l'élément de mât supérieur 9 ;
  • à son autre extrémité, autour d'un axe 32, avec une extrémité d'une autre bielle double 33.
The lower linkage 25 comprises a double rod 29 three points, which is articulated:
  • at one of its ends, around an axis 30, with the end of the body 27 of the jack 24;
  • at an intermediate point of its length, about an axis 31, on the lower part of the upper mast element 9;
  • at its other end, about an axis 32, with one end of another double rod 33.

A son autre extrémité, la bielle double 33 est articulée, autour d'un axe 34, sur la partie supérieure de l'élément de mât inférieur 8.At its other end, the double rod 33 is hinged about an axis 34 on the upper part of the lower mast element 8.

L'embiellage supérieur 26 comprend une bielle double coudée 35 qui est articulée :

  • à l'une de ses extrémités, autour d'un axe 36, sur la partie supérieure de l'élément de mât supérieur 9 ;
  • à son autre extrémité, autour d'un axe 37, à la fois avec une extrémité d'une bielle simple 38, et avec l'extrémité de la tige 28 du vérin 24.
The upper linkage 26 comprises a double crank rod 35 which is articulated:
  • at one of its ends, around an axis 36, on the upper part of the upper mast element 9;
  • at its other end, about an axis 37, both with one end of a simple connecting rod 38, and with the end of the rod 28 of the jack 24.

La bielle simple 38 est articulée à son autre extrémité, autour d'un axe 39, avec le pied de flèche 15.The simple connecting rod 38 is articulated at its other end, about an axis 39, with the jib foot 15.

Le hauban double 13, mentionné plus haut, participe aussi au dispositif 23 de relevage de dépliage, en formant un quadrilatère déformable avec : la partie inférieure de l'élément de mât supérieur 9, la totalité de l'élément de mât inférieur 8, et le châssis tournant 4.The double strut 13, mentioned above, also participates in the unfolding lifting device 23, forming a deformable quadrilateral with: the lower part of the upper mast element 9, the whole of the lower mast element 8, and rotating frame 4.

Le dispositif 23 comprend encore un système de verrouillage 40 de l'extrémité inférieure du vérin 24, donc de l'extrémité du corps 27 de ce vérin 24, ce système de verrouillage 40 étant situé à la base de l'élément de mât supérieur 9, et étant représenté plus particulièrement sur les figures 12 à 14.The device 23 also comprises a locking system 40 of the lower end of the jack 24, hence the end of the body 27 of the jack 24, this locking system 40 being located at the base of the upper mast element 9 , and being shown more particularly in FIGS. 12 to 14.

Le système de verrouillage 40 comprend un verrou 41, situé à l'extrémité du corps 27 du vérin 24, extrémité qui forme une tête élargie 42. Le verrou 41 est composé :

  • d'un vérin hydraulique auxiliaire 43 à double effet, disposé transversalement ;
  • de deux axes opposés 44 et 45, solidaires respectivement du corps et de la tige du vérin auxiliaire 43, et montés coulissants dans les parties latérales de la tête de vérin 42 ;
  • d'un ressort de sécurité 46, intégré au vérin auxiliaire 43, et agissant dans le sens de la sortie de la tige de ce vérin, donc dans le sens de l'écartement des deux axes 44 et 45.
The locking system 40 comprises a latch 41, located at the end of the body 27 of the jack 24, which end forms an enlarged head 42. The latch 41 is composed of:
  • an auxiliary hydraulic jack 43 with double effect, arranged transversely;
  • two opposite axes 44 and 45, respectively integral with the body and the rod of the auxiliary cylinder 43, and slidably mounted in the side portions of the cylinder head 42;
  • a safety spring 46 integrated in the auxiliary cylinder 43, and acting in the direction of the output of the rod of the cylinder, so in the direction of the spacing of the two axes 44 and 45.

Le système de verrouillage 40 comprend encore un ensemble de guidage, composé de deux glissières parallèles 47 et 48, portées par l'élément de mât supérieur 9 et s'étendant aussi parallèlement à cet élément de mât 9. Les deux glissières 47 et 48 sont munies de trous de brochage, situés en correspondance, qui comprennent d'une part une paire de trous de brochage inférieurs 49, et d'autre part une paire de trous de brochage supérieurs 50. Les deux axes 44 et 45 du verrou 41 sont prévus pour être engagés dans les trous de brochage inférieurs 49 (en position "mât replié"), ou dans les trous de brochage supérieurs 50 (en position "mât déplié"), la tête de vérin 42 étant montée déplaçable entre les deux glissières 47 et 48.The locking system 40 further comprises a guide assembly, consisting of two parallel slides 47 and 48, carried by the upper mast element 9 and also extending parallel to this mast element 9. The two slides 47 and 48 are provided with matching pinholes, which comprise on the one hand a pair of lower pinholes 49, and on the other hand a pair of upper pinholes 50. The two pins 44 and 45 of the lock 41 are provided to be engaged in the lower broaching holes 49 (in the "folded mast" position), or in the upper broaching holes 50 (in the "unfolded mast" position), the cylinder head 42 being movably mounted between the two slides 47 and 48.

Enfin, le dispositif 23 comprend une butée 51, située au sommet de l'élément de mât supérieur 9 (voir figures 2 et 3), et coopérant avec l'embiellage supérieur 26, plus particulièrement avec la bielle double coudée 35, de manière à réaliser un arrêt en rotation de cette bielle 35 dans certaines phases du fonctionnement.Finally, the device 23 comprises a stop 51, located at the top of the upper mast element 9 (see FIGS. 2 and 3), and cooperating with the upper linkage 26, more particularly with the double cranked rod 35, so as to stopping rotation of this rod 35 in certain phases of operation.

Le fonctionnement du dispositif 23 s'établit comme suit, en partant de la position repliée de transport de grue (figure 1):The operation of the device 23 is established as follows, starting from the folded crane transport position (FIG. 1):

Au départ, la grue est repliée sur la châssis tournant 4, et ce châssis tournant 4 est lui-même verrouillé en orientation sur le châssis de base 1. L'ensemble constitué par le mât 7 replié et par la flèche 14 repliée prend place sur le côté de la cabine de conduite 6. La tige 28 du vérin 24 est partiellement sortie.Initially, the crane is folded on the rotating frame 4, and this rotating frame 4 is itself locked in orientation on the base frame 1. The assembly consisting of the mast 7 folded and the arrow 14 folded takes place on the side of the cab 6. The rod 28 of the cylinder 24 is partially out.

A partir de cette position, il est d'abord procédé au relevage et au dépliage du mât 7, comme montré aux figures 2 à 4. A cet effet, le vérin 24 est commandé dans le sens de la rentrée de sa tige 28, ce qui actionne l'embiellage inférieur 25 en faisant pivoter ses bielles 29 et 33, alors que l'embiellage supérieur 26 reste en appui sur la butée 51. Ce mouvement entraîne le relevage et dépliage simultané des deux éléments de mât 8 et 9, également à l'aide du quadrilatère déformable précité dont l'un des côtés est constitué par le hauban double 13. Les figures 2 et 3 montrent des positions intermédiaires, en cours de relevage et dépliage, tandis que la figure 4 montre la position finale, obtenue lorsque la tige 28 du vérin 24 est complètement rentrée. Les deux éléments de mât 8 et 9 sont alors parvenus en butée l'un contre l'autre, par l'intermédiaire de plaques d'appui situées respectivement au sommet de l'élément de mât inférieur 8 et à la base de l'élément de mât supérieur 9. Ces deux éléments de mât 8 et 9 sont ainsi arrêtés en position alignée. La flèche 14 reste, jusque là, repliée contre le mât 7.From this position, it is first carried out the lifting and unfolding of the mast 7, as shown in Figures 2 to 4. For this purpose, the cylinder 24 is controlled in the direction of the return of its rod 28, which actuates the lower linkage 25 by rotating its rods 29 and 33, while the upper linkage 26 remains in abutment on the stop 51. This movement causes the simultaneous lifting and unfolding of the two mast elements 8 and 9, also to using the aforesaid deformable quadrilateral of which one side is constituted by the double stay 13. Figures 2 and 3 show intermediate positions, being raised and unfolded, while Figure 4 shows the final position, obtained when the rod 28 of the cylinder 24 is fully retracted. The two mast elements 8 and 9 have then come into abutment against each other, by means of support plates situated respectively at the top of the lower mast element 8 and at the base of the element. 9. These two mast elements 8 and 9 are thus stopped in aligned position. The arrow 14 remains, until then, folded against the mast 7.

On décrira maintenant l'intervention du système de verrouillage 40, au cours de la phase précédemment décrite :We will now describe the intervention of the locking system 40, during the previously described phase:

Au départ (figures 1, 12 et 13), le mât 7 étant replié, le verrou 41 est verrouillé, par ses axes 44 et 45, dans les trous de brochage inférieure 49 des glissières 47 et 48, ce qui fixe la position relative des deux éléments de mât 8 et 9 par l'intermédiaire de l'embiellage inférieur 25. Avant de déplier le mât 7, le vérin auxiliaire 43 est actionné, dans le sens de la rentrée de sa tige, et sa position "tige rentrée" est maintenue entre les deux glissières 47 et 48 ― voir figure 14.Initially (Figures 1, 12 and 13), the mast 7 being folded, the latch 41 is locked by its axes 44 and 45 in the lower pinholes 49 of the slides 47 and 48, which sets the relative position of two mast elements 8 and 9 via the lower linkage 25. Before unfolding the mast 7, the auxiliary cylinder 43 is actuated, in the direction of retraction of its rod, and its "retracted rod" position is maintained between the two slides 47 and 48 - see Figure 14.

Lorsque la grue parvient en position "mât déplié" (figure 4), le verrou 41 est verrouillé, par ses axes 44 et 45, dans les trous de brochage supérieurs 50 des glissières 47 et 48, ce qui fixe la nouvelle position relative des deux éléments de mât 8 et 9, toujours par l'intermédiaire de l'embiellage inférieur 25.When the crane reaches the position "unfolded mast" (Figure 4), the latch 41 is locked by its axes 44 and 45 in the upper pinholes 50 of the slides 47 and 48, which sets the new relative position of the two mast elements 8 and 9, again via the lower linkage 25.

A partir de cette position, il est procédé au relevage et au dépliage de la flèche 14, en commençant par le relevage du pied de flèche 15. A cet effet, le vérin 24 est commandé dans le sens de la sortie de sa tige 28, ce qui actionne l'embiellage supérieur 26 et entraîne le relevage du pied de flèche 15, jusqu'à une position sensiblement horizontale, en fait une position légèrement inclinée vers le haut (par exemple selon un angle d'environ 5°) ― voir figure 5. L'élément intermédiaire 16 de la flèche 14, et la pointe de flèche 17, restent alors repliés sur le pied de flèche 15.From this position, it is proceeded to the lifting and unfolding of the boom 14, starting with the lifting of the boom foot 15. For this purpose, the jack 24 is controlled in the direction of the output of its rod 28, which actuates the upper linkage 26 and causes the lifting of the jib foot 15, to a substantially horizontal position, in fact a position slightly inclined upwards (for example at an angle of about 5 °) - see figure 5. The intermediate element 16 of the boom 14, and the boom tip 17, then remain folded over the boom foot 15.

Enfin, le dépliage complet de la flèche 14, jusqu'à l'alignement de ses trois éléments 15, 16 et 17, est obtenu par une motorisation auxiliaire par vérin et embiellage, non représentée. La grue parvient ainsi dans une configuration de travail, avec sa flèche 14 sensiblement horizontale (figure 6).Finally, the complete unfolding of the boom 14, to the alignment of its three elements 15, 16 and 17, is obtained by an auxiliary actuator cylinder and linkage, not shown. The crane thus arrives in a working configuration, with its arrow 14 substantially horizontal (Figure 6).

D'autres positions de travail de la grue sont obtenues par la commande du vérin 24, dans le sens de sortie de sa tige 28 :

  • Toutes positions de flèche intermédiaires, telles que celle de la figure 7, la flèche 14 restant alignée, peuvent être obtenues entre la position sensiblement horizontale (figure 6) et une position sensiblement verticale (figure 8).
  • La position sensiblement verticale de la flèche 14 (figure 8) est atteinte lors de la butée de la tige 28 du vérin 24 en position de fin de course de sortie.
Other working positions of the crane are obtained by controlling the jack 24, in the output direction of its rod 28:
  • Any intermediate arrow positions, such as that of Figure 7, the arrow 14 remaining aligned, can be obtained between the substantially horizontal position (Figure 6) and a substantially vertical position (Figure 8).
  • The substantially vertical position of the arrow 14 (Figure 8) is reached during the abutment of the rod 28 of the cylinder 24 in the end of stroke position.

Le repliage et l'abaissement de la flèche 14, puis du mât 7, jusqu'au retour dans la position repliée de transport, sont obtenus par des manoeuvres inverses de celles décrites précédemment.Folding and lowering the boom 14, and then the mast 7, until the return to the folded transport position, are obtained by reverse maneuvers of those described above.

Les opérations de relevage et de dépliage du mât 7 et de la flèche 14, et les opérations inverses de repliage et d'abaissement, sont réalisées selon un cycle automatique, piloté par une unité de contrôle-commande comprenant un calculateur. Celui-ci déclenche la succession des commandes de mouvements, en tenant compte des informations fournies par un ensemble de capteurs, par exemple des capteurs d'efforts, de position et de vitesse, pour réaliser un cycle de mouvements préprogrammés dont chaque phase est contrôlée par des capteurs qui autorisent ou non la commande de la phase suivante.The lifting and unfolding operations of the mast 7 and the boom 14, and the reverse folding and lowering operations, are performed according to an automatic cycle, driven by a control unit comprising a computer. This triggers the succession of movement commands, taking into account the information provided by a set of sensors, for example force, position and speed sensors, to perform a preprogrammed movement cycle of which each phase is controlled by sensors that allow or not the control of the next phase.

La grue peut encore être utilisée dans une autre configuration, illustrée par la figure 9, dans laquelle son mât 7 est partiellement déplié, et appuyé sur le châssis tournant par l'intermédiaire d'une béquille arrière 52. Cette configuration permet une distribution des charges, associée à une possibilité de déplacement du châssis porteur de base 1, par exemple pour le chargement et le déchargement de camions.The crane can still be used in another configuration, illustrated in Figure 9, in which its mast 7 is partially unfolded, and supported on the rotating frame via a rear stand 52. This configuration allows a distribution of loads associated with a possibility of displacement of the base carrier frame 1, for example for the loading and unloading of trucks.

Enfin, en se référant à la figure 15, l'axe longitudinal de la flèche 14 est avantageusement déporté latéralement par rapport à l'axe longitudinal du mât 7, et aussi par rapport au dispositif 23, le pied de flèche 15 se situant ainsi sur le côté de l'embiellage supérieur 26. La bielle simple 38 de l'embiellage supérieur 26 est articulée autour d'un axe 39 solidaire de chapes d'une traverse 53 soudée latéralement sur le pied de flèche 15. Grâce à ce décalage latéral, on obtient un gain supplémentaire de visibilité latérale, pour le conducteur posté dans la cabine de conduite 6, lorsque la grue est en position repliée de transport.Finally, with reference to FIG. 15, the longitudinal axis of the boom 14 is advantageously offset laterally with respect to the longitudinal axis of the mast 7, and also with respect to the device 23, the boom foot 15 being thus located on the side of the upper linkage 26. The simple connecting rod 38 of the upper linkage 26 is articulated about an axis 39 secured to the clevises of a cross member 53 laterally welded to the boom foot 15. Due to this lateral offset, an additional gain in lateral visibility is obtained for the driver posted in the driver's cab 6 when the crane is in the folded transport position.

L'on ne s'éloignerait pas du cadre de l'invention, telle que définie dans les revendications annexées :

  • en modifiant les détails constructifs du dispositif, par exemple de ses embiellages ;
  • en réalisant le mât et les éléments de flèche sous la forme de structures de forme et de section quelconques, par exemple avec une structure en treillis et non plus en caisson ;
  • en modifiant le nombre des éléments successifs de la flèche ;
  • en appliquant le dispositif à une grue montée sur un châssis de base, ou autre élément porteur, de tout type et de toute forme, roulant ou non ;
  • en prévoyant, sur la grue, tout agencement de cabine ou de poste de conduite, pouvant différer de l'exemple particulier représenté.
One would not depart from the scope of the invention, as defined in the appended claims:
  • modifying the constructive details of the device, for example of its links;
  • by making the mast and the boom elements in the form of structures of any shape and section, for example with a lattice structure and no longer in a box;
  • by modifying the number of successive elements of the arrow;
  • applying the device to a crane mounted on a base frame, or other carrier, of any type and shape, rolling or not;
  • by providing, on the crane, any arrangement of cabin or driving position, which may differ from the particular example shown.

Claims (6)

  1. A motorized device for raising and unfolding the mast and for folding the jib of a crane, more particularly of a crane with a jib having multiple functions, with a modifiable configuration, which comprises a foldable mast (7) composed of a lower mast element (8), articulated on a chassis (4), and an upper mast element (9), articulated on the top of the lower mast element (8), and a distributing jib (14) composed of successive elements (15, 16, 17) articulated on one another, the first jib (14) element, called a jib foot (15), itself being articulated on the top of the mast (7), and this first jib element (15) and, if appropriate, the following element (16) being capable of being brought into a substantially vertical position, in alignment with the raised mast (7), so as to increase the height of this mast (7), all the jib elements (15, 16, 17) comprising a rolling track (18) for the same carriage (19), characterized in that it comprises a double-acting hydraulic jack (24), the two ends of which are connected respectively to a lower rod assembly (25) and to an upper rod assembly (26), the lower rod assembly (25) intended for raising and unfolding the mast (7) being also connected to the lower part of the upper mast element (9) and to the upper part of the lower mast element (8), and the upper rod assembly (26) intended for raising the jib (14) and for moving it into various working positions being also connected to the upper part of the upper mast element (9) and to the jib foot (15), the device also comprising at least one guy (13) connecting the lower part of the upper mast element (9) to a point of the chassis (4) of the crane on which the lower part of the lower mast element (8) is articulated, and means (40) for locking the lower end of the abovementioned jack (24), in at least two separate positions, on the lower part of the upper mast element (9), and, finally a stop (51) located in the upper part of the upper mast element (9) and provided for cooperating with the upper rod assembly (26).
  2. The device as claimed in claim 1, characterized in that the lower rod assembly (25) comprises a first rod (29), preferably a double rod, articulated at one of its ends (30) on the corresponding end of the jack (24), articulated at an intermediate point (31) on the lower part of the upper mast element (9) and articulated at its other end (32) on one end of a second rod (33), preferably a double rod, itself articulated at its other end (34) on the upper part of the lower mast element (8).
  3. The device as claimed in claim 1 or 2, characterized in that the upper rod assembly (26) comprises a first bent rod (35), preferably a double rod, articulated at one of its ends (36) on the upper part of the upper mast element (9) and articulated, at its other end (37), both on the corresponding end of the jack (24) and on one end of another rod (38), preferably a single rod, the other end (39) of which is articulated on the jib foot (15).
  4. The device as claimed in any one of claims 1 to 3, characterized in that the means (40) for locking the lower end of the jack (24) on the lower part of the upper mast element (9) comprise:
    - on the one hand, at the lower end of the jack (24), a transverse bolt (41) consisting of a double-acting auxiliary jack (43), the body and stem of which are respectively integral with two opposite axles (44, 45) mounted slideably in respective lateral parts (42) of a head of the main jack, a safety spring (46) being provided for keeping the bolt (41) in the active position;
    - on the other hand, on the lower part of the upper mast element (9), a guide assembly composed of two slideways (47, 48) which are parallel ta this mast element (9) and are equipped respectively with lower (49) and upper (50) broaching holes corresponding to one another, the jack head (42) being mounted displaceably between the two slideways (47, 48), the lower broaching holes (49) of which are provided for receiving respectively the two axles (44, 45) of the bolt (41) in the "mast folded" position and the upper broaching holes (50) of which are provided for receiving respectively the two axles (44, 45) of the bolt (41) in the "mast unfolded" position.
  5. The device as claimed in any one of claims 1 to 4, characterized in that the jack (24) is provided not only for raising the mast (7) and the jib foot (15) when the crane is initially being put in place, but also for obtaining all intermediate jib positions via control of the greater or lesser extension of the stem (28) of this jack (24).
  6. The device as c in any one of claims 1 to 5, characterized in that the longitudinal axis of the jib (14) is offset laterally with respect to the longitudinal axis of the mast (7) and also with respect to the device (23), the jib foot (15) thus being located at the side of the upper rod assembly (26).
EP03356043A 2002-04-12 2003-03-10 Device for erecting and unfolding the mast and for erecting the jib of a crane Expired - Lifetime EP1352870B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0204606A FR2838415B1 (en) 2002-04-12 2002-04-12 DEVICE FOR LIFTING AND FILLING THE MAT AND TILTING THE ARROW OF A CRANE
FR0204606 2002-04-12

Publications (2)

Publication Number Publication Date
EP1352870A1 EP1352870A1 (en) 2003-10-15
EP1352870B1 true EP1352870B1 (en) 2007-04-04

Family

ID=28052276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03356043A Expired - Lifetime EP1352870B1 (en) 2002-04-12 2003-03-10 Device for erecting and unfolding the mast and for erecting the jib of a crane

Country Status (7)

Country Link
US (1) US6991120B2 (en)
EP (1) EP1352870B1 (en)
JP (1) JP4185802B2 (en)
DE (1) DE60312913T2 (en)
ES (1) ES2285068T3 (en)
FR (1) FR2838415B1 (en)
RU (1) RU2307062C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101691190B (en) * 2009-09-29 2012-01-04 秦皇岛天业通联重工股份有限公司 Bulk cargo crane

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008007970U1 (en) * 2008-06-13 2008-09-04 Bauer Maschinen Gmbh Construction work tool with swiveling mast
FR3044304B1 (en) * 2015-11-27 2018-09-21 David Broennec LIFTING DEVICE FOR GLAZING INSTALLATION
CN107043078B (en) * 2017-03-27 2018-12-14 绍兴明煌科技有限公司 A kind of folding small-sized electric power equipment take-off and landing device
FR3125032B1 (en) * 2021-07-06 2023-07-07 Manitowoc Crane Group France Crane control method for selecting and applying a preferential load curve according to the inclination of a jib structural element

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
FR1172323A (en) 1956-02-17 1959-02-09 Tractor trolley, especially for lifting devices
IT1164241B (en) * 1983-05-25 1987-04-08 Luigi Cattaneo Spa AUTOMATIC LIFTING CRANE
FR2548646B1 (en) * 1983-07-05 1985-12-13 Cadillon FAST FOLDING FOLDABLE CRANE
FR2605619B1 (en) * 1986-10-27 1989-03-31 Potain Sa FOLDABLE MACHINE FOR HANDLING AND LIFTING LOADS
FR2731999B1 (en) * 1995-03-21 1997-05-30 Potain Sa AUTOMATED MOUNT CRANE WITH LATERAL FOLDABLE BOOM
FR2765564B1 (en) * 1997-07-02 1999-08-27 Potain Sa MATURE FOLDABLE IN THREE ELEMENTS WITH FOLDING / FOLDING DEVICE FOR TOWER CRANE
FR2792627B1 (en) * 1999-04-23 2001-06-01 Potain Sa CRANE WITH MULTI-FUNCTION BOOM
EP1172323A1 (en) * 2000-07-11 2002-01-16 Jean-Marc Yerly Articulated jib crane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101691190B (en) * 2009-09-29 2012-01-04 秦皇岛天业通联重工股份有限公司 Bulk cargo crane

Also Published As

Publication number Publication date
JP2003306295A (en) 2003-10-28
US6991120B2 (en) 2006-01-31
EP1352870A1 (en) 2003-10-15
DE60312913T2 (en) 2007-12-13
US20030196982A1 (en) 2003-10-23
JP4185802B2 (en) 2008-11-26
RU2307062C2 (en) 2007-09-27
ES2285068T3 (en) 2007-11-16
FR2838415B1 (en) 2004-10-01
DE60312913D1 (en) 2007-05-16
FR2838415A1 (en) 2003-10-17

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