WO2021079219A1 - 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
WO2021079219A1
WO2021079219A1 PCT/IB2020/059381 IB2020059381W WO2021079219A1 WO 2021079219 A1 WO2021079219 A1 WO 2021079219A1 IB 2020059381 W IB2020059381 W IB 2020059381W WO 2021079219 A1 WO2021079219 A1 WO 2021079219A1
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Prior art keywords
load
crane
pulley
fixed
sling
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PCT/IB2020/059381
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French (fr)
Inventor
Ludovic Bertrand
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Nexter Systems
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Publication date
Application filed by Nexter Systems filed Critical Nexter Systems
Priority to EP20800715.3A priority Critical patent/EP4048621B1/en
Publication of WO2021079219A1 publication Critical patent/WO2021079219A1/en

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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 boom cranes are well known. They include a fixed member in which at least one movable member is slidably mounted in order to give the boom a variable length.
  • Patent EP1342615 describes such a type of telescopic crane fitted to an armored vehicle.
  • the crane thus disclosed comprises a first end to which is fixed a first end of a sling.
  • the second end of the sling is attached to a load which 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.
  • Such a crane despite its ability to vary its length, cannot lift a load located under the fixed member. To lift the load, it is necessary to raise the boom of the crane in a position close to the 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 displacement in elevation of the boom which can be constrained structurally or due to the environment of the vehicle. The lifting template is therefore limited.
  • the load is raised by pivoting the crane on site, which induces a curved trajectory of the lifted load, a trajectory liable to cause shocks with its environment such as the vehicle body.
  • a crane operator 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 translational movement of the mobile members of the crane, which is particularly difficult to achieve.
  • the invention proposes to solve both this problem of limiting the lifting jig, in particular when a load is located under a fixed member of a telescopic boom crane, as well as the problem posed by the difficulty of lifting. the vertical of a load.
  • the invention relates to a telescopic boom crane intended to be fixed to a vehicle, crane comprising a fixed member in which slides at least one movable member, characterized in that it carries an auxiliary lifting device which comprises a housing which is fixed to the fixed member of the jib substantially above a load to be lifted, and containing at least a first pulley, called a return pulley, with an axis transverse to a sliding direction of the jib, device also comprising a sling which is fixed by one end to an attachment 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 in such a way that the sliding of the movable member causes by means of the sling the vertical lifting or lowering of the load.
  • an auxiliary lifting device which comprises a housing which is fixed to the fixed member of the jib substantially above a load to be lifted, and containing at least a first pulle
  • the box may contain a second pulley, called the 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 which is the axis of the first pulley relative to the fixed member.
  • several bores can be arranged on the fixed member to allow several possible fixing points for the housing along the fixed member.
  • the subject of the invention is also a method for handling a load using a crane according to the preceding characteristics, a method comprising the following steps: - The box is placed so 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; - the load is hung at the second end of the sling; - the extension of the mobile member is controlled until the load is lifted.
  • the method will also include the following steps, after lifting the load: - The movement of the boom in elevation and / or bearing is controlled until the load is placed above a deposit location; - We order the retraction of the movable member until the load is deposited.
  • FIG. 1 represents a view of a vehicle equipped with a crane according to the invention and during a first phase of use.
  • FIG. 1 shows a detail view of an auxiliary lifting device according to the invention.
  • FIG. 1 shows a view of a vehicle equipped with a crane according to the invention and during a second phase of use.
  • FIG. 1 shows a view of a vehicle equipped with a crane according to the invention and during a third phase of use.
  • a vehicle 100 comprises a crane 10 which comprises 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 a movable member 4, can slide, under the action of a non-visible internal cylinder, in the fixed member 2 so as to form a telescopic boom 1.
  • a site jack 3 allows the boom 1 to be raised or lowered at a desired site angle.
  • the 360 degree bearing orientation of the crane 10 is achieved by means of a bearing motorization of the base 11 of the crane (not shown).
  • the lower part of the boom 1 has an auxiliary lifting device 5 which will be better seen in figure 2.
  • This auxiliary lifting device 5 comprises a sling 6 which is fixed by its first end to an attachment point 15 arranged at one end of the movable member 4, at the tip of an arrow 1.
  • the auxiliary lifting device 5 also comprises a housing 7. containing at least a first pulley 8, called a deflection pulley, with an axis 8a transverse to a sliding direction of the arrow 1.
  • the sling 6 travels through the housing 7 and passes over the return pulley 8.
  • the second end of the sling 6 is hooked 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 the boom 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 fixing 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 (a single flange 7a is visible in the figure).
  • the first pulley 8 is pivotally mounted between the flanges 7a and it is disposed 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 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 the 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 can thus be tensioned 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.
  • the dotted line 6a in Figure 2 shows the path that the sling 6 would adopt above the first pulley 8 if the second pulley 9 were absent.
  • the bypass pulley 9 makes it possible to deport the sling 6 below the second pulley 9, which therefore deportes 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 crane 10 can be pivoted in bearing as shown in FIG. 4, then lowered in elevation.
  • the final deposit of the load to the ground is done by controlling the retraction of the mobile member 4 in the fixed member 2 over a length ⁇ 3, which causes a strictly vertical movement of the sling 6 down a length ⁇ 4, and placing 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 jib which can be oriented in elevation and bearing, and that with a strictly vertical movement, both during lifting and during pose.
  • the auxiliary lifting device can optionally be attached at different places 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 according to the invention can thus constitute a kit which may or may not be attached to the crane as required.

Abstract

The invention relates to a crane with a telescopic jib and to a method for handling using such a crane. The crane (10) with a telescopic jib (1) comprises a fixed member (2) inside which at least one mobile member (4) slides. It is characterized in that it bears an auxiliary lifting device (5) which comprises a housing (7) fixed to the fixed member (2) of the jib (1) and above a load (20) that is to be lifted, and which contains a first pulley (8) termed deflection pulley (8), the axis of which is transverse to the direction of sliding of the jib (1). The auxiliary lifting device (5) also comprises a sling (6), fixed by one end to an attachment point (15) located at one end of the mobile member (4), and fixed by its other end to the load (20) that is to be lifted. The sling (6) thus passes over the deflection pulley (8) so that the sliding of the mobile member (4) brings about, via the sling (6), the vertical lifting or lowering of the load (20).

Description

Grue à flèche télescopique et procédé de manutention d’une charge à l’aide d’une telle grueTelescopic boom crane and method of handling a load using such a crane
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. Telescopic boom cranes are well known. They include a fixed member in which at least one movable member is slidably mounted in order to give the boom a variable length. Patent EP1342615 describes such a type of telescopic crane fitted to an armored vehicle.
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 is fixed a first end of a sling. The second end of the sling is attached to a load which 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, it is necessary to raise the boom of the crane in a position close to the 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 displacement in elevation of the boom which can be constrained structurally or due to the environment of the vehicle. The lifting template 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 load is raised by pivoting the crane on site, which induces a curved trajectory of the lifted load, a trajectory liable to cause shocks with its environment such as the vehicle body.
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 translational 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 jig, in particular when a load is located under a fixed member of a telescopic boom crane, as well as the problem posed by the difficulty of lifting. 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 telescopic boom crane intended to be fixed to a vehicle, crane comprising a fixed member in which slides at least one movable member, characterized in that it carries an auxiliary lifting device which comprises a housing which is fixed to the fixed member of the jib substantially above a load to be lifted, and containing at least a first pulley, called a return pulley, with an axis transverse to a sliding direction of the jib, device also comprising a sling which is fixed by one end to an attachment 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 in such a way that the sliding of the movable member causes by means of the sling the vertical lifting or 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 box may contain a second pulley, called the 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 which is the axis of the first pulley 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 bores can be arranged on the fixed member to allow several possible fixing 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 subject of the invention is also a method for handling a load using a crane according to the preceding characteristics, a method comprising the following steps:
- The box is placed so 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;
- the load is hung at 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 method will also include the following steps, after lifting the load:
- The movement of the boom in elevation and / or bearing is controlled until the load is placed above a deposit location;
- We order the retraction of the movable member until the load is deposited.
L’invention sera mieux comprise à la lecture de la description suivante, description faite à la lumière des dessins en annexe, dessins dans lesquels :The invention will be better understood on reading the following description, description made in the light of the accompanying drawings, drawings in which:
représente une vue d’un véhicule doté d’une grue selon l’invention et au cours d’une première phase d’utilisation. represents a view of a vehicle equipped with a crane according to the invention and during a first phase of use.
représente une vue de détail d’un dispositif de levage auxiliaire selon l’invention. shows a detail view of an auxiliary lifting device according to the invention.
représente une vue d’un véhicule doté d’une grue selon l’invention et au cours d’une seconde phase d’utilisation. shows a view of a vehicle equipped with a crane according to the invention and during a second phase of use.
représente une vue d’un véhicule doté d’une grue selon l’invention et au cours d’une troisième phase d’utilisation. shows 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 FIG. 1, a vehicle 100 comprises a crane 10 which comprises 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 a movable member 4, can slide, under the action of a non-visible 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 site jack 3 allows the boom 1 to be raised or lowered at a desired site angle. The 360 degree bearing orientation of the crane 10 is achieved by means of 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 has an auxiliary lifting device 5 which will be better seen in 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 an attachment point 15 arranged at one end of the movable member 4, at the tip of an arrow 1. The auxiliary lifting device 5 also comprises a housing 7. containing at least a first pulley 8, called a deflection pulley, with an 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 through the housing 7 and passes over the return pulley 8. The second end of the sling 6 is hooked 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 the boom 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 fixing 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 (a single 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 disposed 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 in Figure 2 and according to a particular embodiment, the housing 7 contains a second pulley 9, called 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 the 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 it 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 function of the first pulley 8 is to return the sling 6, in the vertical direction, to the load 20 to be lifted. The second pulley 9 makes it possible to separate the sling 6 from the fixed member 2 of the crane and also from the mobile 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. The sling 6 can thus be tensioned 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. The dotted line 6a in Figure 2 shows 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 mobile 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 deport the sling 6 below the second pulley 9, which therefore deportes 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 understood that for particular crane architectures (without obstacle 11), it would be possible to provide a single deflection 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.Note that in this case, the distance d between the deflection pulley 8 and the fixed member 2 would nevertheless be greater than that which can be chosen 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 the sling 6 is installed as in Figure 1 and 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 progressively extended, thus increasing the length of the boom 1.
Comme visible à la figure 3, l’élongation de la flèche 1 d’une longueur ∆1 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 ∆2.As can be seen in Figure 3, the extension of the boom 1 by a length raine1 causes the sling 6 to slide and slide in the auxiliary lifting device 5 which vertically lifts the load 20 located below the limb fixed 2 with a height ∆2.
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 in bearing as shown in FIG. 4, then lowered in elevation.
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 ∆3, ce qui entraine un mouvement strictement vertical de l’élingue 6 vers le bas d’une longueur ∆4, et la dépose de la charge 20 au sol, c’est à dire sans aucune composante de mouvement horizontale.The final deposit of the load to the ground is done by controlling the retraction of the mobile member 4 in the fixed member 2 over a length ∆3, which causes a strictly vertical movement of the sling 6 down a length ∆4, and placing 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.It can therefore be seen that the invention allows the safe and easy handling of a load which is placed under the fixed member of a crane jib which can be oriented in elevation and bearing, and that with a strictly vertical movement, both during lifting and during pose.
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 above, the auxiliary lifting device can optionally be attached at different places 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 selon l’invention peut ainsi constituer un kit qui peut être fixé ou non à la grue en fonction des besoins.The auxiliary lifting device according to the invention can thus constitute a kit which may or may not be attached to the crane as required.

Claims (5)

  1. Grue (10) à flèche télescopique (1) destinée à être fixée à un véhicule, grue (10) comportant un membre fixe (2) dans lequel coulisse au moins un membre mobile (4), caractérisée en ce qu’elle porte un dispositif de levage (5) auxiliaire qui comprend un boîtier (7) qui est fixé au membre fixe (2) de la flèche (1) sensiblement au-dessus d’une charge (20) à soulever, et renfermant au moins une première poulie (8), dite poulie de renvoi (8), d’axe (8a) transversal à une direction de coulissement de la flèche (1), dispositif (5) comprenant également une élingue (6) qui est fixée par une extrémité à un point d’accrochage (15) disposé à une extrémité du membre mobile (4) et qui est destinée à être fixée par son autre extrémité à la charge (20) à soulever, l’élingue (6) passant ainsi sur la poulie de renvoi (8) de telle sorte que le coulissement du membre mobile (4) provoque par l’intermédiaire de l’élingue (6) le soulèvement ou l’abaissement vertical de la charge (20).Crane (10) with telescopic boom (1) intended to be fixed to a vehicle, crane (10) comprising a fixed member (2) in which at least one movable member (4) slides, characterized in that it carries a device auxiliary lifting device (5) which comprises a housing (7) which is fixed to the fixed member (2) of the boom (1) substantially above a load (20) to be lifted, and enclosing at least a first pulley ( 8), called the return pulley (8), of axis (8a) transverse to a sliding direction of the boom (1), device (5) also comprising a sling (6) which is fixed by one end to a point hooking (15) arranged at one end of the movable member (4) and which is intended to be fixed by its other end to the load (20) to be lifted, the sling (6) thus passing over the return pulley ( 8) so that the sliding of the movable member (4) causes via the sling (6) the vertical lifting or lowering of the load (20).
  2. Grue selon la revendication 1, caractérisée en ce que le boîtier (7) renferme une seconde poulie (9), dite poulie de contournement (9), d’axe (9a) parallèle à celui de la première poulie (8), l’axe (9a) de la seconde poulie (9) étant situé à une distance D du membre fixe (2) de la grue (10) plus grande que la distance d à laquelle se situe l’axe (8a) de la première poulie (8) par rapport au membre fixe (2).Crane according to Claim 1, characterized in that the housing (7) contains a second pulley (9), called the bypass pulley (9), with an 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) in relation to the fixed member (2).
  3. Grue selon une des revendications 1 ou 2, caractérisée en ce que plusieurs perçages sont aménagés sur le membre fixe (2) pour permettre plusieurs points de fixation possibles pour le boîtier (7) le long du membre fixe (2).Crane according to one of claims 1 or 2, characterized 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. Procédé de manutention d’une charge (20) à l’aide d’une grue (10) selon une des revendications 1 à 3, procédé comportant les étapes suivantes :
    - on place le boîtier (7) de telle sorte que la première poulie (8) se trouve positionnée à l’aplomb de la charge (20);
    - on fixe une première extrémité de l’élingue (6) au point d’accrochage (15) du membre mobile (4);
    - on accroche la charge (20) à la seconde extrémité de l’élingue (6);
    - on commande l’extension du membre mobile (4) jusqu’à levage de la charge (20).    Method for handling a load (20) using a crane (10) according to one of claims 1 to 3, method comprising the following steps:
    - The housing (7) is placed so that the first pulley (8) is positioned directly above the load (20);
    - A first end of the sling (6) is fixed to the attachment point (15) of the movable member (4);
    - The load (20) is hung at the second end of the sling (6);
    - the extension of the movable member (4) is controlled until the load (20) is lifted.
  5. Procédé de manutention d’une charge (20) selon la revendication 4, procédé comportant également les étapes suivantes après le levage de la charge :
    - on commande le mouvement de la flèche (1) en site et/ou en gisement jusqu’à placer la charge (20) au-dessus d’un emplacement de dépose ;
    - on commande la rétractation du membre mobile (4) jusqu’à dépose de la charge (20).    A method of handling a load (20) according to claim 4, the method also comprising the following steps after lifting the load:
    - The movement of the boom (1) in elevation and / or in bearing is controlled until the load (20) is placed above a deposit location;
    - The retraction of the movable member (4) is controlled until the load (20) is deposited.
PCT/IB2020/059381 2019-10-24 2020-10-06 Crane with a telescopic jib and method for handling a load using such a crane WO2021079219A1 (en)

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EP20800715.3A EP4048621B1 (en) 2019-10-24 2020-10-06 Crane with a telescopic jib and method for handling a load using such a crane

Applications Claiming Priority (2)

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FR1911803 2019-10-24
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.

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WO2021079219A1 true WO2021079219A1 (en) 2021-04-29

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2650697A1 (en) * 1976-11-05 1978-05-11 Bilstein August Fa Towing crane with winch attachment - has pivoted roller on chassis to loop lifting cable into horizontal plane
US6443685B1 (en) * 2000-10-18 2002-09-03 Yuki Numazu Vehicle towing device
EP1342615A2 (en) 2002-03-09 2003-09-10 Rheinmetall Landsysteme GmbH Integrated lifting device for armoured vehicle, particularly for combat vehicles

Family Cites Families (1)

* 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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2650697A1 (en) * 1976-11-05 1978-05-11 Bilstein August Fa Towing crane with winch attachment - has pivoted roller on chassis to loop lifting cable into horizontal plane
US6443685B1 (en) * 2000-10-18 2002-09-03 Yuki Numazu Vehicle towing device
EP1342615A2 (en) 2002-03-09 2003-09-10 Rheinmetall Landsysteme GmbH Integrated lifting device for armoured vehicle, particularly for combat vehicles

Also Published As

Publication number Publication date
EP4048621A1 (en) 2022-08-31
EP4048621B1 (en) 2023-11-29
FR3102470B1 (en) 2022-04-01
FR3102470A1 (en) 2021-04-30

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