EP1873114B1 - Transportable tower crane with a mobile ballast device - Google Patents
Transportable tower crane with a mobile ballast device Download PDFInfo
- Publication number
- EP1873114B1 EP1873114B1 EP20070356042 EP07356042A EP1873114B1 EP 1873114 B1 EP1873114 B1 EP 1873114B1 EP 20070356042 EP20070356042 EP 20070356042 EP 07356042 A EP07356042 A EP 07356042A EP 1873114 B1 EP1873114 B1 EP 1873114B1
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- EP
- European Patent Office
- Prior art keywords
- counterweight
- tower crane
- mast
- revolving platform
- articulated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
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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
- B66C23/344—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes adapted for transport purposes
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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
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
Definitions
- the present invention relates, in general, to the field of tower cranes, and more particularly that of transportable tower cranes, which are foldable for use on a construction site, and foldable for transport from a place of use to a other. Even more particularly, this invention relates to such a crane equipped with a mobile ballast device, the term "ballast" here designating a counterweight placed at the base of the crane, for its balancing and stabilization in position d 'use.
- this tower crane comprises a rotating platform, on which is articulated the lower element of the mast, while the upper element of the mast is hinged to the top of the lower element of the mast.
- the unfolding of the mast is controlled by an articulated assembly with stay cables and connecting rods which, in the particular case of the aforementioned document, comprises a single stay placed in a central position, that is to say located in the vertical median plane of the platform. rotating form and mast.
- the mobile ballast as provided in this document EP 0508907 A1 , is a counterweight mounted on a frame-shaped support, which is itself hinged around a horizontal axis, at the rear of the rotating platform.
- the front part of this support is hingedly connected, via two lateral rods, to the lower element of the mast.
- the counterweight itself, mounted on the support, is made as a single block, with two massive side parts and with a median recessed portion.
- the counterweight and its support are folded horizontally on the rotating platform, occupying the free space between this platform and the articulated structures of the crane. The latter then engage, in part, in the median recess of the counterweight.
- connection made by the connecting rods between the ballast support and the lower mast element causes, simultaneously, the deployment of the mobile ballast upwards or its folding on the platform -form.
- Such a mobile ballast device already meets the general purpose, which is to place, in the position of use, the counterweight quite far from the axis of vertical orientation of the crane, to produce a moment of high stability, while folding the ballast for the transport of the crane, in particular its transport on road.
- the solution proposed by this document is only suitable for an embodiment with a central strut mast training. It is not directly transferable to a crane which, in a more usual way, has two side mast mast shrouds; indeed, in this case, there would be interference between the shrouds and connecting rods, during the lifting of the crane and therefore the mobile ballast.
- the mounting of the counterweight on a support causes a complication of the structure of the mobile ballast device, without providing any particular advantage.
- this method of mounting the counterweight does not optimize, in the lowered transport position, the situation of the mobile ballast relative to the wheels by which the crane is carried and towed on the road.
- the present invention aims to avoid all the disadvantages previously described, and is therefore intended to improve the device considered mobile ballast for tower crane, in particular to adapt it to foldable cranes with lateral stays, while keeping a simple structure, and optimizing the raised and lowered positions of the counterweight, taking into account the environment of this counterweight.
- the subject of the invention is a transportable tower crane with a mobile ballast device, of the kind in question here, that is to say constituted of a counterweight connected by articulation to the rear part of a platform. rotating form of the crane and also connected in an articulated manner, via at least one connecting rod, to an element of a foldable and foldable mast of the crane, so that in the unfolded position of use of the crane, the counterweight is straightened substantially vertically above the rear portion of the turntable, while in the folded transport position of the crane the counterweight is folded over the turntable,
- the counterweight is, on the one hand, articulated to the rear part of the rotating platform by means of lateral elements extending substantially perpendicular to the longitudinal direction of said counterweight, and in that this counterweight is, on the other hand, hingedly connected, via the rod or rods, to the upper element of the foldable and collapsible mast.
- the counterweight is articulated to the rear part of the rotating platform by means of two elongate triangular side plates, integral with this counterweight, the axis of articulation located at the tip of these plates.
- an essential characteristic of the crane according to the present invention resides the particular mode of articulation of the counterweight on the rotating platform, which allows, in the position of use, to bring the counterweight into a position as far as possible from the axis of rotation of the crane, to produce a moment of high stability.
- the plates by which the counterweight is articulated on the platform allow to shift back the center of gravity of the ballast, relative to their articulation, a distance equal to the sum of the half-height of the counterweight and the length of these plates.
- the use of such plates allows a direct articulation of the counterweight on the platform, without the need for a particular support shaped frame.
- the counterweight in the folded transport position the counterweight is brought back above the crane's running axle on the ground, which limits the load on it and allows to obtain an action of the towing shaft of the crane, exerted on the tractor truck, which is oriented towards the ground.
- the counterweight in the folded transport position, has an inclined general orientation, rising from the rear towards the front relative to the rotating platform.
- the counterweight in this particular folded position, can in particular be folded over a cabinet in the central part of the rotating platform, while occupying a sufficiently low height.
- the counterweight can also, in the transport position, be folded horizontally above the rotating platform.
- the counterweight is composed of two separate lateral blocks disposed respectively above the two longitudinal sides of the rotating platform, which allows the articulated structure of the crane to lower in the folded position, between these two blocks. .
- the inclined transport position of the counterweight does not constitute an obstacle to the complete folding of the crane.
- the mobile tower crane with mobile ballast device object of the present invention, overcomes all the disadvantages or shortcomings of the device known in the state of the art.
- This tower crane comprises at its base a fixed frame 1 on which is pivotably mounted, about a vertical axis, a rotating frame or a rotating platform 2.
- the crane comprises a folding foldable mast 3, which is composed of a lower mast element 4 and an upper mast element 5.
- the lower mast element 4 is articulated by its base, about a horizontal axis 6, on the rotating platform 2, towards the front thereof.
- the upper mast element 5 is articulated by its base, around a horizontal axis 7, at the top of the lower mast element 4.
- the boom (not shown) of the crane is itself carried, articulated way by the top of the upper mast element 5.
- the rotating platform 2 here includes, in its central part, a cabinet 8 between the two lateral parts of which is pivotally mounted the lower mast element 4.
- the crane comprises two lateral mast struts 9, mounted between the rotating platform 2 and the mast 3. More particularly, each shroud 9 is hinged, on the one hand, at a point 10 situated on the rear of the mast. the cabinet 8 and, secondly, at a point 11 located on the upper mast element 5.
- the two stays 9 are associated with a motorized control device for unfolding and folding the mast 3, which device is composed of a linkage 12 located in the region of the intermediate articulation (axis 7) of the mast 3, and a single cylinder 13 connecting the linkage 12 to an intermediate point 14 of the lower mast element 4.
- the linkage 12 comprises, on each side of the region of the intermediate hinge of the mast 3, two connecting rods respectively articulated to the two elements of mast 4 and 5.
- the crane further comprises a rear tie rod, not shown, which connects the rear portion of the rotating platform 2 to the arrow, to ensure the retention thereof.
- This rear tie also controls the unfolding of the boom simultaneously with the unfolding of the mast 3 controlled by the device composed of the linkage 12 and the jack 13.
- the crane comprises a mobile ballast device, designated as a whole by the reference 15.
- the mobile ballast device 15 comprises a counterweight, which consists of two separate lateral blocks 16, arranged respectively above on both longitudinal sides of the rotating platform 2, in a symmetrical arrangement with respect to the vertical median plane of this platform. A central free space 17 is thus formed between the two constituent blocks 16 of the counterweight.
- the counterweight consisting of the two blocks 16, is articulated to the rear part of the rotating platform 2 by means of two lateral plates 18, of elongated triangular shape, which extend substantially perpendicular to the longitudinal direction of this counterweight .
- the axis of articulation, thus connecting the counterweight to the rotating platform 2, is a horizontal axis 19 which is located at the tip of the plates 18.
- the portion of the counterweight furthest from these plates 18 is connected, by two lateral rods 20, to the upper mast element 5. More particularly, the two rods 20 are parallel and each connect one of the side blocks 16 of the counterweight to one side of the upper mast element 5. One end of each rod 20 is hingedly connected at a point 21 to the corresponding side block 9 while the other end of this rod 20 is articulated on a spacer lateral 22 carried by the upper mast element 5, in particular welded to this mast element.
- the positions of the hinge points 21, and the spacers 22, offset the vertical planes of displacement of the two rods 20 outwardly, relative to the vertical displacement planes of the two shrouds 9. The latter thus occupy an "inner" position , avoiding any interference between the stays 9 on the one hand, and the connecting rods 20 on the other hand.
- the counterweight consisting of the two blocks 16 is pivotally movable about the axis 19 between a rectified position of use ( figures 1 and 2 ) and a folded transport position ( figure 4 ), passing through intermediate positions such as that of the figure 3 .
- Unfolding or folding the mast 3 of the crane controlled by the jack 13 associated with the linkage 12, is used to straighten the counterweight (blocks 16) and bring it to the use position, or to fold it down in working position, via connecting rods 20.
- the two triangular side plates 18 extend substantially horizontally towards the rear of the hinge axis 19, which shifts the center of gravity of the counterweight (blocks 16) towards the rear, with respect to the axis of articulation 19, a distance equal to the sum of the half height of the 16 blocks and the length of a plate 18. It is therefore understandable to achieve a high counterweight, and long plates 18.
- the counterweight (blocks 16) has a general orientation inclined at an angle A, which may be of the order of 30 °, relative to the horizontal, the counterweight rising from the rear to the front relatively to the rotating platform 2.
- angle A which may be of the order of 30 °, relative to the horizontal
- the blocks 16 constituting the counterweight are folded over the cabinet 8 present in the central part of the rotating platform 2.
- the articulated structure of the crane including its boom here not shown, is lowered between the two blocks 16, and thus takes place in the central free space 17.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Description
La présente invention concerne, de façon générale, le domaine des grues à tour, et plus particulièrement celui des grues à tour transportables, qui sont dépliables pour leur utilisation sur un chantier, et repliables pour leur transport d'un lieu d'utilisation à un autre. Encore plus particulièrement, cette invention se rapporte à une telle grue équipée d'un dispositif de lest mobile, le terme « lest » désignant ici un contrepoids placé à la base de la grue, en vue de son équilibrage et de sa stabilisation en position d'utilisation.The present invention relates, in general, to the field of tower cranes, and more particularly that of transportable tower cranes, which are foldable for use on a construction site, and foldable for transport from a place of use to a other. Even more particularly, this invention relates to such a crane equipped with a mobile ballast device, the term "ballast" here designating a counterweight placed at the base of the crane, for its balancing and stabilization in position d 'use.
Par le document
De façon généralement connue, cette grue à tour comporte une plate-forme tournante, sur laquelle est articulé l'élément inférieur du mât, tandis que l'élément supérieur du mât est articulé au sommet de l'élément inférieur du mât. Le dépliage du mât est commandé par un ensemble articulé à haubans et bielles qui, dans le cas particulier du document précité, comprend un hauban unique placé en position centrale, c'est-à-dire situé dans le plan médian vertical de la plate-forme tournante et du mât.In a generally known manner, this tower crane comprises a rotating platform, on which is articulated the lower element of the mast, while the upper element of the mast is hinged to the top of the lower element of the mast. The unfolding of the mast is controlled by an articulated assembly with stay cables and connecting rods which, in the particular case of the aforementioned document, comprises a single stay placed in a central position, that is to say located in the vertical median plane of the platform. rotating form and mast.
Le lest mobile, tel que prévu dans ce document
Le contrepoids lui-même, monté sur le support, est réalisé comme un seul bloc, avec deux parties latérales massives et avec une partie médiane évidée.The counterweight itself, mounted on the support, is made as a single block, with two massive side parts and with a median recessed portion.
En position dépliée d'utilisation de la grue, le contrepoids et son support s'élèvent à la verticale, au-dessus de la partie arrière de la plate-forme tournante.In unfolded position of use of the crane, the counterweight and its support rise vertically, above the rear part of the rotating platform.
En position repliée de transport de la grue, le contrepoids et son support sont rabattus à l'horizontale, sur la plate-forme tournante, en occupant l'espace libre entre cette plate-forme et les structures articulées de la grue. Ces dernières s'engagent alors, en partie, dans l'évidement médian du contrepoids.In the folded transport position of the crane, the counterweight and its support are folded horizontally on the rotating platform, occupying the free space between this platform and the articulated structures of the crane. The latter then engage, in part, in the median recess of the counterweight.
Lors des opérations de dépliage ou de repliage de la grue, la liaison réalisée par les bielles entre le support du lest et l'élément de mât inférieur provoque, de façon simultanée, le déploiement du lest mobile vers le haut ou son rabattement sur la plate-forme.During operations of unfolding or folding the crane, the connection made by the connecting rods between the ballast support and the lower mast element causes, simultaneously, the deployment of the mobile ballast upwards or its folding on the platform -form.
Un tel dispositif de lest mobile répond déjà au but général, qui est de placer, en position d'utilisation, le contrepoids assez loin de l'axe d'orientation vertical de la grue, pour produire un moment de stabilité élevé, tout en repliant le lest pour le transport de la grue, notamment son transport sur route.Such a mobile ballast device already meets the general purpose, which is to place, in the position of use, the counterweight quite far from the axis of vertical orientation of the crane, to produce a moment of high stability, while folding the ballast for the transport of the crane, in particular its transport on road.
Toutefois, la réalisation particulière décrite dans le document
En particulier, la solution proposée par ce document est uniquement adaptée à une réalisation avec un hauban central de dressage du mât. Elle n'est pas directement transposable à une grue qui, de manière plus habituelle, possède deux haubans latéraux de dressage du mât ; en effet, dans ce cas, on observerait une interférence entre les haubans et les bielles, lors du relevage de la grue et donc du lest mobile.In particular, the solution proposed by this document is only suitable for an embodiment with a central strut mast training. It is not directly transferable to a crane which, in a more usual way, has two side mast mast shrouds; indeed, in this case, there would be interference between the shrouds and connecting rods, during the lifting of the crane and therefore the mobile ballast.
Il s'avère aussi que l'abaissement du lest mobile à l'horizontale, tel que le prévoit le document
Par ailleurs, le montage du contrepoids sur un support, qui est lui-même articulé à la plate-forme, entraîne une complication de la structure du dispositif de lest mobile, sans apporter aucun avantage particulier. En particulier, ce mode de montage du contrepoids n'optimise pas, en position abaissée de transport, la situation du lest mobile relativement aux roues par lesquelles la grue est portée et tractée sur route.Furthermore, the mounting of the counterweight on a support, which is itself articulated to the platform, causes a complication of the structure of the mobile ballast device, without providing any particular advantage. In particular, this method of mounting the counterweight does not optimize, in the lowered transport position, the situation of the mobile ballast relative to the wheels by which the crane is carried and towed on the road.
La présente invention vise à éviter l'ensemble des inconvénients précédemment exposés, et elle a donc pour but de perfectionner le dispositif considéré de lest mobile pour grue à tour transportable, en particulier pour l'adapter à des grues dépliables à haubans latéraux, tout en conservant une structure simple, et en optimisant les positions tant relevée que rabattue du contrepoids, en tenant compte de l'environnement de ce contrepoids.The present invention aims to avoid all the disadvantages previously described, and is therefore intended to improve the device considered mobile ballast for tower crane, in particular to adapt it to foldable cranes with lateral stays, while keeping a simple structure, and optimizing the raised and lowered positions of the counterweight, taking into account the environment of this counterweight.
A cet effet, l'invention a pour objet une grue à tour transportable avec dispositif de lest mobile, du genre ici concerné, c'est-à-dire constitué d'un contrepoids relié par articulation à la partie arrière d'une plate-forme tournante de la grue et relié aussi de façon articulée, par l'intermédiaire d'au moins une bielle, à un élément d'un mât dépliable et repliable de la grue, de telle sorte qu'en position dépliée d'utilisation de la grue, le contrepoids est redressé sensiblement à la verticale au-dessus de la partie arrière de la plate-forme tournante, tandis qu'en position repliée de transport de la grue le contrepoids est rabattu au-dessus de la plate-forme tournante, cette grue à tour étant essentiellement caractérisée par le fait que le contrepoids est, d'une part, articulé à la partie arrière de la plate-forme tournante par l'intermédiaire d'éléments latéraux s'étendant sensiblement perpendiculairement à la direction longitudinale dudit contrepoids, et en ce que ce contrepoids est, d'autre part, relié de façon articulée, par l'intermédiaire de la ou des bielles, à l'élément supérieur du mât dépliable et repliable.To this end, the subject of the invention is a transportable tower crane with a mobile ballast device, of the kind in question here, that is to say constituted of a counterweight connected by articulation to the rear part of a platform. rotating form of the crane and also connected in an articulated manner, via at least one connecting rod, to an element of a foldable and foldable mast of the crane, so that in the unfolded position of use of the crane, the counterweight is straightened substantially vertically above the rear portion of the turntable, while in the folded transport position of the crane the counterweight is folded over the turntable, which tower crane is essentially characterized in that the counterweight is, on the one hand, articulated to the rear part of the rotating platform by means of lateral elements extending substantially perpendicular to the longitudinal direction of said counterweight, and in that this counterweight is, on the other hand, hingedly connected, via the rod or rods, to the upper element of the foldable and collapsible mast.
Dans une forme de réalisation de la grue à tour transportable selon l'invention, le contrepoids est articulé à la partie arrière de la plate-forme tournante par l'intermédiaire de deux plaques latérales de forme triangulaire allongée, solidaires de ce contrepoids, l'axe d'articulation se situant au niveau de la pointe de ces plaques.In one embodiment of the transportable tower crane according to the invention, the counterweight is articulated to the rear part of the rotating platform by means of two elongate triangular side plates, integral with this counterweight, the axis of articulation located at the tip of these plates.
Ainsi, une caractéristique essentielle de la grue selon la présente invention réside le mode particulier d'articulation du contrepoids sur la plate-forme tournante, lequel permet, en position d'utilisation, d'amener le contrepoids dans une position la plus éloignée possible de l'axe de rotation de la grue, pour produire un moment de stabilité élevé. En effet, les plaques par lesquelles le contrepoids est articulé sur la plate-forme permettent de décaler vers l'arrière le centre de gravité du lest, par rapport à leur articulation, d'une distance égale à la somme de la demi-hauteur du contrepoids et de la longueur de ces plaques. Par ailleurs, le recours à de telles plaques permet une articulation directe du contrepoids sur la plate-forme, sans nécessité d'un support particulier en forme de cadre.Thus, an essential characteristic of the crane according to the present invention resides the particular mode of articulation of the counterweight on the rotating platform, which allows, in the position of use, to bring the counterweight into a position as far as possible from the axis of rotation of the crane, to produce a moment of high stability. Indeed, the plates by which the counterweight is articulated on the platform allow to shift back the center of gravity of the ballast, relative to their articulation, a distance equal to the sum of the half-height of the counterweight and the length of these plates. Furthermore, the use of such plates allows a direct articulation of the counterweight on the platform, without the need for a particular support shaped frame.
De plus, grâce à la configuration préconisée par l'invention, en position rabattue de transport le contrepoids se trouve ramené au-dessus de l'essieu de roulage au sol de la grue, ce qui limite la charge sur celui-ci et permet d'obtenir une action du timon de remorquage de la grue, exercée sur le camion tracteur, qui soit orientée vers le sol.In addition, thanks to the configuration recommended by the invention, in the folded transport position the counterweight is brought back above the crane's running axle on the ground, which limits the load on it and allows to obtain an action of the towing shaft of the crane, exerted on the tractor truck, which is oriented towards the ground.
Selon une caractéristique avantageuse de la grue selon l'invention, dans la position rabattue de transport, le contrepoids possède une orientation générale inclinée, s'élevant de l'arrière vers l'avant relativement à la plate-forme tournante. Dans cette position rabattue particulière, le contrepoids peut notamment être rabattu sur une armoire présente dans la partie centrale de la plate-forme tournante, tout en occupant une hauteur suffisamment faible.According to an advantageous characteristic of the crane according to the invention, in the folded transport position, the counterweight has an inclined general orientation, rising from the rear towards the front relative to the rotating platform. In this particular folded position, the counterweight can in particular be folded over a cabinet in the central part of the rotating platform, while occupying a sufficiently low height.
Toutefois, dans une autre forme de construction, le contrepoids peut aussi, dans la position de transport, être rabattu à l'horizontale au-dessus de la plate-forme tournante.However, in another form of construction, the counterweight can also, in the transport position, be folded horizontally above the rotating platform.
Avantageusement, le contrepoids est composé de deux blocs latéraux séparés, disposés respectivement au-dessus des deux côtés longitudinaux de la plate-forme tournante, ce qui permet à la structure articulée de la grue de s'abaisser en position repliée, entre ces deux blocs. Ainsi, la position de transport inclinée du contrepoids ne constitue nullement un obstacle au repliage complet de la grue.Advantageously, the counterweight is composed of two separate lateral blocks disposed respectively above the two longitudinal sides of the rotating platform, which allows the articulated structure of the crane to lower in the folded position, between these two blocks. . Thus, the inclined transport position of the counterweight does not constitute an obstacle to the complete folding of the crane.
Enfin, le fait que le contrepoids soit relié par des bielles à l'élément de mât supérieur (et non plus à l'élément de mât inférieur) permet de diminuer les efforts, lors du repliage et du dépliage. Au cours de ces opérations, l'interférence entre les bielles d'une part, et les haubans latéraux de dressage du mât d'autre part, qui se déplacent dans des plans verticaux parallèles, est facilement évitée par exemple en prévoyant, sur l'élément de mât supérieur, des entretoises latérales auxquelles sont articulées les bielles qui décalent vers l'extérieur les plans de déplacement de ces bielles par rapport aux plans de déplacement des haubans de dressage du mât qui occupent ici une position « intérieure ».Finally, the fact that the counterweight is connected by connecting rods to the upper mast element (and no longer to the lower mast element) reduces the efforts during folding and unfolding. During these operations, the interference between the connecting rods on the one hand, and the side mast side shrouds on the other hand, which move in parallel vertical planes, is easily avoided for example by providing, on the upper mast member, lateral spacers which are articulated rods which shift outwardly the planes of movement of these rods relative to the mast mast shrouds of travel plans occupy here an "inner" position.
Ainsi, la grue à tour transportable avec dispositif de lest mobile, objet de la présente invention, permet de remédier à tous les inconvénients ou toutes les insuffisances du dispositif connu de l'état de la technique.Thus, the mobile tower crane with mobile ballast device, object of the present invention, overcomes all the disadvantages or shortcomings of the device known in the state of the art.
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 cette grue à tour transportable avec dispositif de lest mobile :
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Figure 1 est une vue partielle, en perspective, d'une grue à tour équipée d'un dispositif de lest mobile, conforme à la présente invention, en position d'utilisation ; -
Figure 2 est une vue de côté de la grue en position d'utilisation, en correspondance avec lafigure 1 ; -
Figure 3 est une vue de côté similaire à lafigure 2 , montrant cette grue en position partiellement repliée ; -
Figure 4 est une autre vue de côté, similaire aux précédentes, montrant la même grue en position repliée de transport, avec le contrepoids rabattu.
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Figure 1 is a partial view, in perspective, of a tower crane equipped with a mobile ballast device, according to the present invention, in the position of use; -
Figure 2 is a side view of the crane in use position, in correspondence with thefigure 1 ; -
Figure 3 is a side view similar to thefigure 2 , showing this crane in a partially folded position; -
Figure 4 is another side view, similar to the previous ones, showing the same crane in folded transport position, with the counterweight folded down.
Sur toutes les figures, la grue à tour est représentée sans indication de sa flèche, laquelle n'est pas concernée par la présente invention.In all the figures, the tower crane is shown without indication of its arrow, which is not concerned by the present invention.
Cette grue à tour comprend à sa base un châssis fixe 1 sur lequel est monté de façon orientable, autour d'un axe vertical, un châssis tournant ou une plate-forme tournante 2.This tower crane comprises at its base a fixed frame 1 on which is pivotably mounted, about a vertical axis, a rotating frame or a
La grue comprend un mât dépliable et repliable 3, qui est composé d'un élément de mât inférieur 4 et d'un élément de mât supérieur 5. L'élément de mât inférieur 4 est articulé par sa base, autour d'un axe horizontal 6, sur la plate-forme tournante 2, vers l'avant de celle-ci. L'élément de mât supérieur 5 est articulé par sa base, autour d'un axe horizontal 7, au sommet de l'élément de mât inférieur 4. La flèche (non représentée) de la grue est elle-même portée, de façon articulée, par le sommet de l'élément de mât supérieur 5.The crane comprises a folding
La plate-forme tournante 2 inclut ici, dans sa partie centrale, une armoire 8 entre les deux parties latérales de laquelle est monté pivotant l'élément de mât inférieur 4.The
La grue comprend deux haubans latéraux 9 de dressage de mât 3, montés entre la plate-forme tournante 2 et le mât 3. Plus particulièrement, chaque hauban 9 est articulé, d'une part, en un point 10 situé sur l'arrière de l'armoire 8 et, d'autre part, en un point 11 situé sur l'élément de mât supérieur 5.The crane comprises two
Les deux haubans 9 sont associés à un dispositif motorisé de commande de dépliage et repliage du mât 3, dispositif qui est composé d'un embiellage 12 situé dans la zone de l'articulation intermédiaire (axe 7) du mât 3, et d'un vérin unique 13 reliant l'embiellage 12 à un point intermédiaire 14 de l'élément de mât inférieur 4. L'embiellage 12 comprend, de chaque côté de la zone de l'articulation intermédiaire du mât 3, deux bielles articulées respectivement aux deux éléments de mât 4 et 5.The two
La grue comprend encore un tirant arrière, non représenté, qui relie la partie arrière de la plate-forme tournante 2 à la flèche, pour assurer la retenue de celle-ci. Ce tirant arrière commande aussi le dépliage de la flèche simultanément au dépliage du mât 3 commandé par le dispositif composé de l'embiellage 12 et du vérin 13.The crane further comprises a rear tie rod, not shown, which connects the rear portion of the
La grue comprend un dispositif de lest mobile, désigné dans son ensemble par la référence 15.The crane comprises a mobile ballast device, designated as a whole by the
Le dispositif de lest mobile 15 comprend un contrepoids, qui est constitué par deux blocs latéraux séparés 16, disposés respectivement au-dessus des deux côtés longitudinaux de la plate-forme tournante 2, dans une disposition symétrique par rapport au plan médian vertical de cette plate-forme. Un espace libre central 17 est ainsi ménagé entre les deux blocs 16 constitutifs du contrepoids.The
Le contrepoids, constitué des deux blocs 16, est articulé à la partie arrière de la plate-forme tournante 2 par l'intermédiaire de deux plaques latérales 18, de forme triangulaire allongée, qui s'étendent sensiblement perpendiculairement à la direction longitudinale de ce contrepoids. L'axe d'articulation, reliant ainsi le contrepoids à la plate-forme tournante 2, est un axe horizontal 19 qui se situe au niveau de la pointe des plaques 18.The counterweight, consisting of the two
La partie du contrepoids la plus éloignée de ces plaques 18 est reliée, par deux bielles latérales 20, à l'élément de mât supérieur 5. Plus particulièrement, les deux bielles 20 sont parallèles et relient chacune l'un des blocs latéraux 16 du contrepoids à un côté de l'élément de mât supérieur 5. Une extrémité de chaque bielle 20 est reliée de façon articulée, en un point 21, au bloc latéral 9 correspondant, tandis que l'autre extrémité de cette bielle 20 est articulée sur une entretoise latérale 22 portée par l'élément de mât supérieur 5, notamment soudée sur cet élément de mât. Les positions des points d'articulation 21, et les entretoises 22, décalent les plans verticaux de déplacement des deux bielles 20 vers l'extérieur, par rapport aux plans de déplacement verticaux des deux haubans 9. Ces derniers occupent ainsi une position « intérieure », évitant toute interférence entre les haubans 9 d'une part, et les bielles 20 d'autre part.The portion of the counterweight furthest from these
Grâce à la structure du dispositif de lest mobile 15, le contrepoids constitué des deux blocs 16 est déplaçable, par pivotement autour de l'axe 19, entre une position redressée d'utilisation (
Plus particulièrement, en position redressée d'utilisation (
En position rabattue de transport (
L'on ne s'éloignerait pas du cadre de l'invention, telle que définie dans les revendications annexées :
- en modifiant les détails de forme du dispositif de lest mobile, par exemple du contrepoids et de ses plaques d'articulation ;
- en réalisant une inversion de position entre les haubans et les bielles, c'est-à-dire en disposant les deux bielles intérieurement et les deux haubans extérieurement ;
- en positionnant le contrepoids non pas dans une orientation inclinée, mais à l'horizontale, dans la position rabattue de transport, l'orientation inclinée n'étant ici que la conséquence de la position et de la configuration de l'armoire de la plate-forme tournante ;
- éventuellement, en réalisant le contrepoids sous la forme d'un bloc unique, le cas échéant avec une seule bielle reliant ce contrepoids au mât ;
- en appliquant l'invention à des grues transportables pouvant posséder toutes particularités.
- by modifying the shape details of the mobile ballast device, for example the counterweight and its hinge plates;
- by performing a reversal of position between the stays and the connecting rods, that is to say by arranging the two connecting rods internally and the two shrouds externally;
- by positioning the counterweight not in an inclined orientation, but horizontally, in the folded transport position, the inclined orientation being here only the consequence of the position and the configuration of the cabinet of the platform. rotating form;
- possibly, realizing the counterweight in the form of a single block, if necessary with a single connecting rod connecting the counterweight to the mast;
- applying the invention to transportable cranes that can have any particularities.
Claims (8)
- Portable tower crane with mobile ballast device (15), said device (15) being composed of a counterweight (16) connected by a joint (19) to the rear part of a revolving platform (2) of the crane and likewise connected in an articulated ma nner, by means of at least one connecting rod (20), to an element of an unfoldable and refoldable mast (3) of the crane, such that, in the unfolded, service position of the crane, the counterweight (16) is erected substantially vertically above the rear pa rt of the revolving platform (2), whereas in the folded transport position of the crane, the counterweight (16) is folded down above the revolving platform (2), characterized in that the counterweight (16) is, on the one hand, articulated to the rear part of the revolving platform (2) by means of side elements (18) extending substantially perpendicularly to the longitudinal direction of said counterweight (16), and in that said counterweight (16) is, on the other hand, connected in an articulated manner, by means of one or more connecting rod(s) (20), to the upper element (5) of the unfoldable and refoldable mast (3).
- Portable tower crane according to Claim 1, characterized in that the counterweight (16) is articulated to the rear part of the revolving platform (2) by means of two side plates (18) of an elongated triangular shape, firmly joined to said counterweight (16), the hinge pin (19) being located at the level of the tips of said plates (18).
- Portable tower crane according to Claim 1 or 2, characterized in that, in the folded transport position, the counterweight (16) has a general inclined orientation (A), rising from the rear forwards relative to the revolving platform (2).
- Portable tower crane according to Claim 3, characterized in that the counterweight (16) is folded down onto a cabinet (8) present in the central part of the revolving platform (2).
- Portable tower crane according to Claim 1 or 2, characterized in that, in the transport position, the counterweight (16) is folded do wn horizontally above the revolving platform (2).
- Portable tower crane according to any one of Claims 1 to 5, characterized in that the counterweight is composed of two separate side blocks (16), arranged respectively above the two longitudinal sides of the revolving platform (2).
- Portable tower crane according to Claim 6, characterized in that two parallel connecting rods (20) are provided, each of which links one of the side blocks (16) of the counterweight to one side of the upper mast element (5).
- Portable tower crane according to any one of Claims 1 to 7, characterized in that, on the upper mast element (5), lateral cross members (22) are provided to which are articulated the connecting rods (20) and which shift the planes of displacement of these connecting rods (20) outwards relative to the planes of displacement of the erecting stays (9) of the mast (3), which occupy an "internal" position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0605877A FR2903095B1 (en) | 2006-06-29 | 2006-06-29 | MOBILE LEST DEVICE FOR TRANSPORTABLE TOWER CRANE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1873114A1 EP1873114A1 (en) | 2008-01-02 |
EP1873114B1 true EP1873114B1 (en) | 2008-12-31 |
Family
ID=37546913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20070356042 Expired - Fee Related EP1873114B1 (en) | 2006-06-29 | 2007-04-03 | Transportable tower crane with a mobile ballast device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1873114B1 (en) |
DE (1) | DE602007000430D1 (en) |
ES (1) | ES2320279T3 (en) |
FR (1) | FR2903095B1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE680166A (en) * | 1965-05-07 | 1966-10-03 | ||
ES2054535B1 (en) * | 1991-04-12 | 1995-08-01 | Aldaz Alberto Munarriz | IMPROVEMENTS IN THE SUBJECT OF THE MAIN PATENT N 9100941 FOR "TILTING COUNTERWEIGHT SYSTEM FOR DEPLOYABLE CRANES". |
-
2006
- 2006-06-29 FR FR0605877A patent/FR2903095B1/en active Active
-
2007
- 2007-04-03 DE DE200760000430 patent/DE602007000430D1/en active Active
- 2007-04-03 EP EP20070356042 patent/EP1873114B1/en not_active Expired - Fee Related
- 2007-04-03 ES ES07356042T patent/ES2320279T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
FR2903095A1 (en) | 2008-01-04 |
DE602007000430D1 (en) | 2009-02-12 |
ES2320279T3 (en) | 2009-05-20 |
EP1873114A1 (en) | 2008-01-02 |
FR2903095B1 (en) | 2008-08-22 |
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