EP4048621B1 - Crane with a telescopic jib and method for handling a load using such a crane - Google Patents

Crane with a telescopic jib and method for handling a load using such a crane Download PDF

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Publication number
EP4048621B1
EP4048621B1 EP20800715.3A EP20800715A EP4048621B1 EP 4048621 B1 EP4048621 B1 EP 4048621B1 EP 20800715 A EP20800715 A EP 20800715A EP 4048621 B1 EP4048621 B1 EP 4048621B1
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EP
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Prior art keywords
load
crane
pulley
sling
fixed member
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EP20800715.3A
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German (de)
French (fr)
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EP4048621A1 (en
Inventor
Ludovic Bertrand
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Knds France
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Nexter Systems 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
    • B66C23/62—Constructional features or details
    • 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
    • B66C23/64—Jibs
    • B66C23/66—Outer or upper end constructions

Definitions

  • the technical field of the invention is that of telescopic cranes and in particular auxiliary lifting devices intended to equip a telescopic boom crane.
  • Telescopic jib cranes are well known. They comprise a fixed member in which at least one movable member is slidably mounted in order to give the arrow a variable length.
  • the patent EP1342615 describes such a type of telescopic crane equipping an armored vehicle with a crane according to the characteristics of the preamble of independent claim 1.
  • the crane thus disclosed comprises a first end to which a first end of a sling is attached.
  • the second end of the sling is attached to a load that must be lifted and then moved around the vehicle.
  • the charge is an armor plate located on the periphery of the vehicle. Note that the load is always located directly above the end of the boom.
  • the lifting of the load is done by pivoting the crane in elevation, which induces a curved trajectory of the lifted load, a trajectory likely to cause impacts with its environment such as the body of the vehicle.
  • the invention proposes to solve both this problem of limiting the lifting gauge, in particular when a load is located under a fixed member of a telescopic jib crane, as well as the problem posed by the difficulty of lifting at the vertical of a load.
  • the invention relates to a crane with a telescopic boom intended to be attached to a vehicle, crane comprising a fixed member in which at least one movable member slides, characterized in that it carries an auxiliary lifting device which comprises a housing which is attached to the fixed member of the boom substantially above a load to be lifted, and containing at least a first pulley, called a return pulley, with an axis transverse to a direction of sliding of the boom, device also comprising a sling which is fixed by one end to a hooking point arranged at one end of the movable member and which is intended to be fixed by its other end to the load to be lifted, the sling thus passing over the return pulley such that the sliding of the movable member causes, via the sling, the lifting or vertical lowering of the load.
  • an auxiliary lifting device which comprises a housing which is attached to the fixed member of the boom substantially above a load to be lifted, and containing at least a first pulley, called a return pull
  • the housing may contain a second pulley, called a bypass pulley, with an axis parallel to that of the first pulley, the axis of the second pulley being located at a distance D from the fixed member of the crane greater than the distance d at which the axis of the first pulley is located relative to the fixed member.
  • a vehicle 100 includes a crane 10 which includes a telescopic boom 1 fixed to the roof 101 of the vehicle 100 (fixing means not shown).
  • the telescopic boom 1 comprises a so-called fixed member 2 secured to a base 11 of the crane 10.
  • Another member 4, called mobile member 4 can slide, under the action of an invisible internal cylinder, in the fixed member 2 so as to form a telescopic boom 1.
  • a elevation cylinder 3 makes it possible to raise or lower the boom 1 according to a desired elevation angle.
  • the bearing orientation over 360 degrees of the crane 10 is done thanks to a bearing motorization of the base 11 of the crane (not shown).
  • the lower part of the boom 1 includes an auxiliary lifting device 5 which will be better seen at the figure 2 .
  • This auxiliary lifting device 5 comprises a sling 6 which is fixed by its first end to a hooking point 15 disposed at one end of the movable member 4, arrowhead 1.
  • the auxiliary lifting device 5 also comprises a housing 7 containing at least a first pulley 8, called a return pulley, of axis 8a transverse to a sliding direction of the arrow 1.
  • the sling 6 travels in the housing 7 and passes over the return pulley 8.
  • the second end of the sling 6 is attached to a load 20 (here a spare wheel 20) which is located on the roof of the vehicle 100 and under the fixed member 2 of arrow 1.
  • the housing 7 is fixed to the fixed member 4 of the boom 1 by suitable fixing means, such as bolts (not shown).
  • suitable fixing means such as bolts (not shown).
  • several holes can be provided on the fixed member 4 to allow several possible attachment points for the housing 7 along the fixed member 2.
  • housing 7 is fixed substantially above the load 20 to be lifted.
  • the housing 7 is formed of a pair of parallel flanges 7a (only one flange 7a is visible in the figure).
  • the first pulley 8 is pivotally mounted between the flanges 7a and it is arranged at a lower end of the housing 7, oriented towards the lower end of the fixed member 2.
  • the housing 7 contains a second pulley 9, called the bypass pulley, which is also pivotally mounted on the flanges 7a and which is oriented towards the upper end of the fixed member 2.
  • the first and second pulley 8 and 9 have their axes 8a and 9a parallel, however the axis 8a of the first pulley 8 is at a distance d from the fixed member 2 which is less than the distance D separating the axis 9a from the second pulley 9 and the fixed member 2.
  • the sling 6 passes between the flanges 7a and is guided by the pulleys 8 and 9 which have grooves not shown.
  • the sling 6 passes above the first pulley 8 and below the second pulley 9.
  • the first pulley 8 has the function of returning the sling 6, in the vertical direction, towards the load 20 to be lifted.
  • the second pulley 9 makes it possible to move the sling 6 away from the fixed member 2 of the crane and also from the movable member 4.
  • the sling 6 could then interfere with an obstacle 11, for example a flange secured to a fixed or movable member of the crane.
  • the bypass pulley 9 makes it possible to shift the sling 6 below the second pulley 9, which therefore shifts the sling 6 away from the fixed member 2, by a distance D which is greater than the distance d separating the first pulley 8 and the fixed member 2.
  • the distance d between the return pulley 8 and the fixed member 2 would nevertheless be greater than that which it is possible to choose when using a bypass pulley 9.
  • the elongation of the boom 1 by a length ⁇ 1 causes the tension and sliding of the sling 6 in the auxiliary lifting device 5 which vertically lifts the load 20 located below the fixed member 2 by a height ⁇ 2 .
  • the crane 10 can be pivoted into bearing as shown in Figure figure 4 , then lowered in site.
  • the final removal of the load to the ground is done by controlling the retraction of the movable member 4 into the fixed member 2 over a length ⁇ 3, which results in a strictly vertical movement of the sling 6 downwards by a length ⁇ 4 , and the deposit of the load 20 on the ground, that is to say without any horizontal movement component.
  • the invention allows the safe and easy handling of a load which is placed under the fixed member of a crane boom adjustable in elevation and bearing and this with a strictly vertical movement, both during lifting and lowering. laid.
  • the auxiliary lifting device can possibly be fixed at different locations on the fixed member 2 to allow the lifting to be adapted to the position of the load relative to the fixed member.
  • the auxiliary lifting device can thus constitute a kit which can be attached or not to the crane depending on needs.

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

Description

Le domaine technique de l'invention est celui des grues télescopiques et en particulier des dispositifs de levage auxiliaires destinés à équiper une grue à flèche télescopique.The technical field of the invention is that of telescopic cranes and in particular auxiliary lifting devices intended to equip a telescopic boom crane.

Les grues à flèche télescopique sont bien connues. Elles comportent un membre fixe dans lequel au moins un membre mobile est monté coulissant afin de donner à la flèche une longueur variable. Le brevet EP1342615 décrit un tel type de grue télescopique équipant un véhicule blindé avec une grue selon les caractéristiques du préambule de la revendication indépendante 1.Telescopic jib cranes are well known. They comprise a fixed member in which at least one movable member is slidably mounted in order to give the arrow a variable length. The patent EP1342615 describes such a type of telescopic crane equipping an armored vehicle with a crane according to the characteristics of the preamble of independent claim 1.

La grue ainsi divulguée, comprend une première extrémité à laquelle est fixée une première extrémité d'une élingue. La seconde extrémité de l'élingue est fixée à une charge qui doit être levée puis déplacée autour du véhicule. En l'espèce la charge est une plaque de blindage située à la périphérie du véhicule. On note que la charge est toujours située à l'aplomb de l'extrémité de la flèche.The crane thus disclosed comprises a first end to which a first end of a sling is attached. The second end of the sling is attached to a load that must be lifted and then moved around the vehicle. In this case the charge is an armor plate located on the periphery of the vehicle. Note that the load is always located directly above the end of the boom.

Une telle grue, malgré sa capacité à faire varier sa longueur, ne peut pas effectuer de levage d'une charge située sous le membre fixe. Pour soulever la charge, il faut relever la flèche de la grue dans une position proche de la verticale afin de positionner l'extrémité de la flèche au-dessus de la charge, ce qui n'est pas toujours possible pour des raisons de limitation du débatement maximal en site de la flèche qui peut être bridé structurellement ou bien du fait de l'environnement du véhicule. Le gabarit de levage se trouve donc limité.Such a crane, despite its ability to vary its length, cannot lift a load located under the fixed member. To lift the load, the crane boom must be raised to a position close to vertical in order to position the end of the boom above the load, which is not always possible for reasons of limitation of the load. maximum clearance at the height of the boom which can be restricted structurally or due to the environment of the vehicle. The lifting gauge is therefore limited.

De plus, l'élévation de la charge se fait par pivotement de la grue en site ce qui induit une trajectoire courbe de la charge soulevée, trajectoire susceptible d'occasionner des chocs avec son environnement tel que la caisse du véhicule.In addition, the lifting of the load is done by pivoting the crane in elevation, which induces a curved trajectory of the lifted load, a trajectory likely to cause impacts with its environment such as the body of the vehicle.

Pour obtenir une trajectoire purement verticale de la charge, un opérateur de la grue doit alors combiner le mouvement de pivotement en site de la grue avec un mouvement de translation des membres mobiles de la grue ce qui est particulièrement difficile à réaliser.To obtain a purely vertical trajectory of the load, a crane operator must then combine the pivoting movement in elevation of the crane with a translation movement of the mobile members of the crane, which is particularly difficult to achieve.

L'invention propose de résoudre tout à la fois ce problème de limitation du gabarit de levage, en particulier lorsqu'une charge est située sous un membre fixe d'une grue à flèche télescopique, ainsi que le problème posé par la difficulté de levage à la verticale d'une charge.The invention proposes to solve both this problem of limiting the lifting gauge, in particular when a load is located under a fixed member of a telescopic jib crane, as well as the problem posed by the difficulty of lifting at the vertical of a load.

Ainsi, l'invention porte sur une grue à flèche télescopique destinée à être fixée à un véhicule, grue comportant un membre fixe dans lequel coulisse au moins un membre mobile, caractérisée en ce qu'elle porte un dispositif de levage auxiliaire qui comprend un boîtier qui est fixé au membre fixe de la flèche sensiblement au-dessus d'une charge à soulever, et renfermant au moins une première poulie, dite poulie de renvoi, d'axe transversal à une direction de coulissement de la flèche, dispositif comprenant également une élingue qui est fixée par une extrémité à un point d'accrochage disposé à une extrémité du membre mobile et qui est destinée à être fixée par son autre extrémité à la charge à soulever, l'élingue passant ainsi sur la poulie de renvoi de telle sorte que le coulissement du membre mobile provoque par l'intermédiaire de l'élingue le soulèvement ou l'abaissement vertical de la charge.Thus, the invention relates to a crane with a telescopic boom intended to be attached to a vehicle, crane comprising a fixed member in which at least one movable member slides, characterized in that it carries an auxiliary lifting device which comprises a housing which is attached to the fixed member of the boom substantially above a load to be lifted, and containing at least a first pulley, called a return pulley, with an axis transverse to a direction of sliding of the boom, device also comprising a sling which is fixed by one end to a hooking point arranged at one end of the movable member and which is intended to be fixed by its other end to the load to be lifted, the sling thus passing over the return pulley such that the sliding of the movable member causes, via the sling, the lifting or vertical lowering of the load.

Avantageusement, le boîtier pourra renfermer une seconde poulie, dite poulie de contournement, d'axe parallèle à celui de la première poulie, l'axe de la seconde poulie étant situé à une distance D du membre fixe de la grue plus grande que la distance d à laquelle se situe l'axe de la première poulie par rapport au membre fixe.Advantageously, the housing may contain a second pulley, called a bypass pulley, with an axis parallel to that of the first pulley, the axis of the second pulley being located at a distance D from the fixed member of the crane greater than the distance d at which the axis of the first pulley is located relative to the fixed member.

Avantageusement, plusieurs perçages pourront être aménagés sur le membre fixe pour permettre plusieurs points de fixation possibles pour le boîtier le long du membre fixe.Advantageously, several holes can be provided on the fixed member to allow several possible attachment points for the housing along the fixed member.

L'invention a également pour objet un procédé de manutention d'une charge à l'aide d'une grue selon les caractéristiques précédentes, procédé comportant les étapes suivantes :

  • on place le boîtier de telle sorte que la première poulie se trouve positionnée à l'aplomb de la charge ;
  • on fixe une première extrémité de l'élingue au point d'accrochage du membre mobile ;
  • on accroche la charge à la seconde extrémité de l'élingue ;
  • on commande l'extension du membre mobile jusqu'à levage de la charge.
The invention also relates to a method of handling a load using a crane according to the preceding characteristics, a method comprising the following steps:
  • the housing is placed in such a way that the first pulley is positioned directly above the load;
  • a first end of the sling is fixed to the attachment point of the movable member;
  • we hang the load on the second end of the sling;
  • the extension of the mobile member is controlled until the load is lifted.

Avantageusement, le procédé comportera également les étapes suivantes, après le levage de la charge :

  • on commande le mouvement de la flèche en site et/ou en gisement jusqu'à placer la charge au-dessus d'un emplacement de dépose ;
  • on commande la rétractation du membre mobile jusqu'à dépose de la charge.
Advantageously, the process will also include the following steps, after lifting the load:
  • the movement of the boom is controlled in elevation and/or bearing until the load is placed above a deposit location;
  • the retraction of the mobile member is controlled until the load is removed.

L'invention sera mieux comprise à la lecture de la description suivante, description faite à la lumière des dessins en annexe, dessins dans lesquels :

  • [Fig.1] représente une vue d'un véhicule doté d'une grue selon l'invention et au cours d'une première phase d'utilisation.
  • [Fig.2] représente une vue de détail d'un dispositif de levage auxiliaire selon l'invention.
  • [Fig.3] représente une vue d'un véhicule doté d'une grue selon l'invention et au cours d'une seconde phase d'utilisation.
  • [Fig.4] représente une vue d'un véhicule doté d'une grue selon l'invention et au cours d'une troisième phase d'utilisation.
The invention will be better understood on reading the following description, description made in light of the appended drawings, drawings in which:
  • [ Fig.1 ] represents a view of a vehicle equipped with a crane according to the invention and during a first phase of use.
  • [ Fig.2 ] represents a detailed view of an auxiliary lifting device according to the invention.
  • [ Fig.3 ] represents a view of a vehicle equipped with a crane according to the invention and during a second phase of use.
  • [ Fig.4 ] represents a view of a vehicle equipped with a crane according to the invention and during a third phase of use.

Selon la figure 1, un véhicule 100 comporte une grue 10 qui comporte une flèche télescopique 1 fixée au toit 101 du véhicule 100 (moyens de fixation non représentés). La flèche 1 télescopique comporte un membre 2 dit fixe solidaire d'une la base 11 de la grue 10.According to figure 1 , a vehicle 100 includes a crane 10 which includes a telescopic boom 1 fixed to the roof 101 of the vehicle 100 (fixing means not shown). The telescopic boom 1 comprises a so-called fixed member 2 secured to a base 11 of the crane 10.

Un autre membre 4, dit membre mobile 4, peut coulisser, sous l'action d'un vérin interne non visible, dans le membre fixe 2 de manière à former une flèche télescopique 1.Another member 4, called mobile member 4, can slide, under the action of an invisible internal cylinder, in the fixed member 2 so as to form a telescopic boom 1.

Un vérin 3 de site permet de lever ou d'abaisser la flèche 1 selon un angle de site souhaité. L'orientation en gisement sur 360 degrés de la grue 10 se fait grâce à une motorisation en gisement de la base 11 de la grue (non représentée).A elevation cylinder 3 makes it possible to raise or lower the boom 1 according to a desired elevation angle. The bearing orientation over 360 degrees of the crane 10 is done thanks to a bearing motorization of the base 11 of the crane (not shown).

La partie inférieure de la flèche 1 comporte un dispositif de levage auxiliaire 5 qui sera mieux vu à la figure 2.The lower part of the boom 1 includes an auxiliary lifting device 5 which will be better seen at the figure 2 .

Ce dispositif de levage auxiliaire 5 comporte une élingue 6 qui est fixée par sa première extrémité à un point d'accrochage 15 disposé à une extrémité du membre mobile 4, en pointe de flèche 1. Le dispositif de levage auxiliaire 5 comporte aussi un boîtier 7 renfermant au moins une première poulie 8, dite poulie de renvoi, d'axe 8a transversal à une direction de coulissement de la flèche 1.This auxiliary lifting device 5 comprises a sling 6 which is fixed by its first end to a hooking point 15 disposed at one end of the movable member 4, arrowhead 1. The auxiliary lifting device 5 also comprises a housing 7 containing at least a first pulley 8, called a return pulley, of axis 8a transverse to a sliding direction of the arrow 1.

L'élingue 6 chemine dans le boîtier 7 et passe sur la poulie de renvoi 8. La seconde extrémité de l'élingue 6 est accrochée à une charge 20 (ici une roue de secours 20) qui est située sur le toit du véhicule 100 et sous le membre fixe 2 de la flèche 1.The sling 6 travels in the housing 7 and passes over the return pulley 8. The second end of the sling 6 is attached to a load 20 (here a spare wheel 20) which is located on the roof of the vehicle 100 and under the fixed member 2 of arrow 1.

Le boîtier 7 est fixé au membre fixe 4 de la flèche 1 par des moyens de fixation appropriés, tels que des boulons (non représentés). Avantageusement on pourra prévoir plusieurs perçages sur le membre fixe 4 pour permettre plusieurs points de fixation possibles pour le boîtier 7 le long du membre fixe 2.The housing 7 is fixed to the fixed member 4 of the boom 1 by suitable fixing means, such as bolts (not shown). Advantageously, several holes can be provided on the fixed member 4 to allow several possible attachment points for the housing 7 along the fixed member 2.

Ici le boîtier 7 est fixé sensiblement au-dessus de la charge 20 à soulever.Here the housing 7 is fixed substantially above the load 20 to be lifted.

Selon la figure 2, le boîtier 7 est formé d'une paire de flasques 7a parallèles (un seul flasque 7a est visible sur la figure).According to figure 2 , the housing 7 is formed of a pair of parallel flanges 7a (only one flange 7a is visible in the figure).

La première poulie 8 est montée pivotante entre les flasques 7a et elle est disposée au niveau d'une extrémité inférieure du boîtier 7, orientée vers l'extrémité inférieure du membre fixe 2.The first pulley 8 is pivotally mounted between the flanges 7a and it is arranged at a lower end of the housing 7, oriented towards the lower end of the fixed member 2.

Comme on le voit sur la figure 2 et selon un mode de réalisation particulier, le boîtier 7 renferme une seconde poulie 9, dite poulie de contournement, qui est elle aussi montée pivotante sur les flasques 7a et qui est orientée vers l'extrémité supérieure du membre fixe 2.As seen on the figure 2 and according to a particular embodiment, the housing 7 contains a second pulley 9, called the bypass pulley, which is also pivotally mounted on the flanges 7a and which is oriented towards the upper end of the fixed member 2.

La première et la seconde poulie 8 et 9 ont leurs axes 8a et 9a parallèles, cependant l'axe 8a de la première poulie 8 est à une distance d du membre fixe 2 qui est inférieure à la distance D séparant l'axe 9a de la seconde poulie 9 et le membre fixe 2.The first and second pulley 8 and 9 have their axes 8a and 9a parallel, however the axis 8a of the first pulley 8 is at a distance d from the fixed member 2 which is less than the distance D separating the axis 9a from the second pulley 9 and the fixed member 2.

L'élingue 6 passe entre les flasques 7a et elle est guidée par les poulies 8 et 9 qui comportent des gorges non représentées. L'élingue 6 passe au-dessus de la première poulie 8 et en dessous de la seconde poulie 9.The sling 6 passes between the flanges 7a and is guided by the pulleys 8 and 9 which have grooves not shown. The sling 6 passes above the first pulley 8 and below the second pulley 9.

La première poulie 8 a pour fonction de renvoyer l'élingue 6, suivant la direction verticale, vers la charge 20 à soulever. La seconde poulie 9 permet d'écarter l'élingue 6 du membre fixe 2 de la grue et également du membre mobile 4.The first pulley 8 has the function of returning the sling 6, in the vertical direction, towards the load 20 to be lifted. The second pulley 9 makes it possible to move the sling 6 away from the fixed member 2 of the crane and also from the movable member 4.

On peut ainsi tendre l'élingue 6 entre le point d'accrochage 15 à l'extrémité de la flèche 1 et la charge 20 tout en évitant toute interférence avec le ou les membres de la grue lors du levage.It is thus possible to tension the sling 6 between the attachment point 15 at the end of the boom 1 and the load 20 while avoiding any interference with the member(s) of the crane during lifting.

On a représenté par la ligne de pointillés 6a sur la figure 2 le cheminement qu'adopterait l'élingue 6 au-dessus de la première poulie 8 si la seconde poulie 9 était absente.We have represented by the dotted line 6a on the figure 2 the path that the sling 6 would adopt above the first pulley 8 if the second pulley 9 were absent.

On remarque que l'élingue 6 pourrait alors interférer avec un obstacle 11, par exemple une bride solidaire d'un membre fixe ou mobile de la grue.Note that the sling 6 could then interfere with an obstacle 11, for example a flange secured to a fixed or movable member of the crane.

La poulie de contournement 9 permet de déporter l'élingue 6 en dessous de la seconde poulie 9, ce qui déporte donc l'élingue 6 à distance du membre fixe 2, d'une distance D qui est supérieure à la distance d séparant la première poulie 8 et le membre fixe 2.The bypass pulley 9 makes it possible to shift the sling 6 below the second pulley 9, which therefore shifts the sling 6 away from the fixed member 2, by a distance D which is greater than the distance d separating the first pulley 8 and the fixed member 2.

Il est bien entendu que pour des architectures de grues particulières (sans obstacle 11), il serait possible de prévoir une unique poulie de renvoi 8 et de ne pas prévoir de poulie de contournement 9.It is of course understood that for particular crane architectures (without obstacle 11), it would be possible to provide a single return pulley 8 and not to provide a bypass pulley 9.

On notera que dans ce cas, la distance d entre la poulie de renvoi 8 et le membre fixe 2 serait néanmoins supérieure à celle qu'il est possible de choisir lorsqu'on utilise une poulie de contournement 9.It will be noted that in this case, the distance d between the return pulley 8 and the fixed member 2 would nevertheless be greater than that which it is possible to choose when using a bypass pulley 9.

Lorsque l'élingue 6 est installée comme à la figure 1 et qu'elle relie le point d'accrochage 15 du membre mobile 4 à la charge 20 en passant par le boîtier 5, le membre mobile 4 peut alors être progressivement mis en extension, faisant ainsi augmenter la longueur de la flèche 1.When sling 6 is installed as in figure 1 and that it connects the attachment point 15 of the movable member 4 to the load 20 passing through the housing 5, the movable member 4 can then be gradually extended, thus increasing the length of the arrow 1.

Comme visible à la figure 3, l'élongation de la flèche 1 d'une longueur Δ1 entraine la tension et le glissement de l'élingue 6 dans le dispositif de levage auxiliaire 5 ce qui lève verticalement la charge 20 située en dessous du membre fixe 2 d'une hauteur Δ2.As visible at Figure 3 , the elongation of the boom 1 by a length Δ1 causes the tension and sliding of the sling 6 in the auxiliary lifting device 5 which vertically lifts the load 20 located below the fixed member 2 by a height Δ2 .

Une fois la charge 20 soulevée de son emplacement de repos initial sur le toit 101 du véhicule 100, la grue 10 peut être pivotée en gisement comme représenté à la figure 4, puis abaissée en site.Once the load 20 has been lifted from its initial resting location on the roof 101 of the vehicle 100, the crane 10 can be pivoted into bearing as shown in Figure figure 4 , then lowered in site.

La dépose finale de la charge jusqu'au sol se fait en commandant la rétractation du membre mobile 4 dans le membre fixe 2 sur une longueur Δ3, ce qui entraine un mouvement strictement vertical de l'élingue 6 vers le bas d'une longueur Δ4, et la dépose de la charge 20 au sol, c'est à dire sans aucune composante de mouvement horizontale.The final removal of the load to the ground is done by controlling the retraction of the movable member 4 into the fixed member 2 over a length Δ3, which results in a strictly vertical movement of the sling 6 downwards by a length Δ4 , and the deposit of the load 20 on the ground, that is to say without any horizontal movement component.

On constate donc que l'invention permet la manutention sûre et aisée d'une charge qui est placée sous le membre fixe d'une flèche de grue orientable en site et gisement et cela avec un mouvement strictement vertical, tant lors du soulèvement que de la pose.We therefore see that the invention allows the safe and easy handling of a load which is placed under the fixed member of a crane boom adjustable in elevation and bearing and this with a strictly vertical movement, both during lifting and lowering. laid.

Comme décrit précédemment, le dispositif de levage auxiliaire peut être éventuellement fixé à différents endroits sur le membre fixe 2 pour permettre d'adapter le levage à la position de la charge par rapport au membre fixe.As described previously, the auxiliary lifting device can possibly be fixed at different locations on the fixed member 2 to allow the lifting to be adapted to the position of the load relative to the fixed member.

Le dispositif de levage auxiliaire peut ainsi constituer un kit qui peut être fixé ou non à la grue en fonction des besoins.The auxiliary lifting device can thus constitute a kit which can be attached or not to the crane depending on needs.

Claims (5)

  1. - A crane (10) with a telescopic jib (1), intended to be attached to a vehicle, the crane (10) including a fixed member (2) in which at least one movable member (4) slides, characterised in that it bears an auxiliary lifting device (5) which comprises a housing (7) which is attached to the fixed member (2) of the jib (1) substantially above a load (20) to be lifted, and containing at least a first pulley (8), called guide pulley (8), of axis (8a) transverse to a sliding direction of the jib (1), the device (5) also comprising a sling (6) which is attached by one end to an attachment point (15) provided at one end of the movable member (4) and which is intended to be attached by its other end to the load (20) to be lifted, the sling (6) thus passing over the guide pulley (8) such that the sliding of the movable member (4) causes, by means of the sling (6), the vertical lifting or lowering of the load (20).
  2. - The crane according to claim 1, characterised in that the housing (7) contains a second pulley (9), called bypass pulley (9), of axis (9a) parallel to that of the first pulley (8), the axis (9a) of the second pulley (9) being located at a distance D from the fixed member (2) of the crane (10) greater than the distance d at which the axis (8a) of the first pulley (8) is located with respect to the fixed member (2).
  3. - The crane according to one of claims 1 or 2, characterised in that several bores are arranged on the fixed member (2) to allow several possible fixing points for the housing (7) along the fixed member (2).
  4. - A method for handling a load (20) using a crane (10) according to one of claims 1 to 3, the method including the following steps:
    - placing the housing (7) such that the first pulley (8) is positioned directly above the load (20);
    - attaching a first end of the sling (6) to the attachment point (15) of the movable member (4);
    - attaching the load (20) to the second end of the sling (6) ;
    - controlling the extension of the movable member (4) until the load (20) is lifted.
  5. - The method for handling a load (20) according to claim 4, the method also including the following steps after the lifting of the load:
    - controlling the movement of the jib (1) in elevation and/or in relative bearing until the load (20) is placed above a deposit location;
    - controlling the retraction of the movable member (4) until the load (20) is deposited.
EP20800715.3A 2019-10-24 2020-10-06 Crane with a telescopic jib and method for handling a load using such a crane Active EP4048621B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1911803A FR3102470B1 (en) 2019-10-24 2019-10-24 AUXILIARY LIFTING DEVICE INTENDED TO EQUIP A TELESCOPIC JIB CRANE, CRANE SO EQUIPPED AND METHOD FOR HANDLING A LOAD USING SUCH A CRANE.
PCT/IB2020/059381 WO2021079219A1 (en) 2019-10-24 2020-10-06 Crane with a telescopic jib and method for handling a load using such a crane

Publications (2)

Publication Number Publication Date
EP4048621A1 EP4048621A1 (en) 2022-08-31
EP4048621B1 true EP4048621B1 (en) 2023-11-29

Family

ID=69572111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20800715.3A Active EP4048621B1 (en) 2019-10-24 2020-10-06 Crane with a telescopic jib and method for handling a load using such a crane

Country Status (4)

Country Link
EP (1) EP4048621B1 (en)
ES (1) ES2970370T3 (en)
FR (1) FR3102470B1 (en)
WO (1) WO2021079219A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024162928A1 (en) * 2023-02-01 2024-08-08 Fnss Savunma Si̇stemleri̇ A.Ş. Portable load‐lifting mechanism for military vehicles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066804A (en) * 1961-03-13 1962-12-04 William G Mccrossen Double line derricks
DE2650697C3 (en) * 1976-11-05 1979-04-19 Fa. August Bilstein, 5828 Ennepetal Towing crane for motor vehicles
US6443685B1 (en) * 2000-10-18 2002-09-03 Yuki Numazu Vehicle towing device
EP1342615B1 (en) 2002-03-09 2010-03-24 Rheinmetall Landsysteme GmbH Integrated lifting device for armoured vehicle, particularly for combat vehicles

Also Published As

Publication number Publication date
FR3102470B1 (en) 2022-04-01
FR3102470A1 (en) 2021-04-30
WO2021079219A1 (en) 2021-04-29
ES2970370T3 (en) 2024-05-28
EP4048621A1 (en) 2022-08-31

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