EP1057776B1 - Articulated jib crane - Google Patents

Articulated jib crane Download PDF

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Publication number
EP1057776B1
EP1057776B1 EP99810483A EP99810483A EP1057776B1 EP 1057776 B1 EP1057776 B1 EP 1057776B1 EP 99810483 A EP99810483 A EP 99810483A EP 99810483 A EP99810483 A EP 99810483A EP 1057776 B1 EP1057776 B1 EP 1057776B1
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EP
European Patent Office
Prior art keywords
jib
head member
foot
placing
lifting machine
Prior art date
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Expired - Lifetime
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EP99810483A
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German (de)
French (fr)
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EP1057776A1 (en
Inventor
Jean-Marc Yerly
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Individual
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Individual
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Priority to EP99810483A priority Critical patent/EP1057776B1/en
Priority to DE69919517T priority patent/DE69919517T2/en
Priority to AT99810483T priority patent/ATE273921T1/en
Publication of EP1057776A1 publication Critical patent/EP1057776A1/en
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Publication of EP1057776B1 publication Critical patent/EP1057776B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail

Definitions

  • the present invention relates to a lifting device with a distribution boom working in articulated mode or in lifting mode for lifting and handling of charges, according to the preamble of claim 1.
  • boom cranes hinged and swiveling vending machine i.e. articulated jib cranes adjustable.
  • Lifting distribution boom cranes also have the advantage, for compared to horizontal jib cranes of comparable pylon heights, ability to bring loads to greater heights.
  • Patent FR 2605619 describes a crane which combines the effects of a crane with distributor boom articulated with those of a lifting distributor boom crane, thus giving a certain versatility.
  • the crane described has the advantage of being unfoldable and foldable and this automatically.
  • this crane always has a minimum reach important.
  • the height gain under hook obtained when the tip of the arrow is raised remains relatively small, cannot exceed an amplitude angular equivalent to 30 ° from the horizontal.
  • the object of the present invention is to produce a jib lifting device versatile swivel dispenser, which can just as easily be used as a lifting jib crane only as a jib crane articulated, the transformation from one function to another must be done the most simply possible.
  • the object of the present invention is also to produce a multipurpose swiveling distributing boom lift which, when working as a articulated distributor boom crane, has a very small minimum reach.
  • Another object of the present invention is to produce a lifting machine with Versatile orientable distributor boom capable of distributing a load with a regular speed, in particular with a constant horizontal speed when works like an articulated jib crane.
  • the present invention also aims to achieve a lifting machine to versatile orientable distributor boom which, when the boom is articulated on a articulated pylon, can be folded up as compactly as possible so that it can be placed in a marine-type container for its transport.
  • the present invention relates to a boom lifting device swiveling distributor working in articulated mode or in lifting mode for the lifting and handling of loads as defined in claim 1, the dependent claims 2 to 12 specifying the characteristics of the different variants of this craft.
  • the first variant of the lifting device with swiveling distributing jib working in articulated mode or in lifting mode for lifting and handling of loads as shown in Figure 1 has a collapsible pylon consisting of two sections articulated to each other, namely a pylon base 21 and an upper pylon 22.
  • the pylon foot is pivotally mounted about an axis horizontal on the front part of a rotating chassis or turret 12.
  • the pylon upper door pivoting around a horizontal articulation 26, on the one hand, a articulated and lifting distributing boom 31, 41 and, on the other hand, two punches symmetrical 16 connected at their ends by an axis carrying two pulleys 17.
  • the turret 12 is pivotally mounted about a vertical axis on a carrying frame 11.
  • the pylon is kept in the usual working position thanks to a set of elements consisting of a ballast 13 fixed on the rear part of the turret 12, straightening struts 23 connecting the pylon to the turret, two tie rods 25, all connected to a control device not shown in the drawing, capable of be for example a winch placed on the turret 12, the two tie rods passing respectively on the two pulleys 17 of the punches 16.
  • the articulated and lifting distributor boom consists of two parts masters, namely an arrow foot 31 and a dart 41, articulated one to the other.
  • the lower end of the jib foot 31 is connected, by means of the horizontal joint 26, at the top of the upper pylon 22.
  • the other end of the boom foot is connected, via a horizontal articulation 45, to the dart 41.
  • the articulation 45 divides the dart 41 into two asymmetrical parts, namely a dart 42, carrying at its end two pulleys 44, and a dart point 43, carrying at its end 46 two pulleys guiding means load suspension consisting of a lifting cable 53, a muffle and a lifting hook 54.
  • the distributor arrow is in working position in articulated mode.
  • the tie rods 25 pass successively through the grooves in the pulleys 17 of the two punches 16, then in those of the two pulleys 44 of the jib 42, and are fixed on the dart 41.
  • the tie rods 25 form with the arrow foot 31, the two punches 16 and the counter-dart 42 a quadrilateral deformable. This geometric configuration, known from the prior art, allows the end 46 of the tip of the dart 43 to cover a surface approximately flat and horizontal.
  • the dart foot 31 is in fact made up of two parallel beams 31a and 31b laterally mounted on either side, on the one hand, of the upper pylon 22, and, on the other hand, of the dart 41.
  • the counter-dart 42 can be housed within the slot or the spacing 34 generated between these two beams 31a and 31b and perfect alignment of the dart 41 with the arrow foot 31 is then obtained, which, as we see below, allows a significant gain in height under hook compared to to the versatile arrows of the prior art which have a bent shape.
  • FIG. 2 shows different phases of boom operation distributor in articulated mode.
  • the device controlling the tie rods 25 has been previously blocked so keep the distance between the pulleys 17 and 44 constant during all phases of the articulation of the distributing arrow.
  • a distribution cable 51 fixed to the end 46 of the dart, passes through the groove of a pulley 28 placed at the top of the upper pylon 22 and is connected to a control device not shown in the drawing, which may for example be a winch placed on the turret 12, and which makes it possible to vary the length of this cable.
  • the end 46 of the dart point 43 passes through the intermediate position C, approximately corresponding to the minimum span position which was obtained with the lifting devices of the prior art.
  • Figure 3 shows, in detail, the arrangement different elements at the top of the upper pylon 22. It can be seen that the articulation 26, supporting the jib foot 31, is placed at the front of the pylon superior. A joint 27, supporting, on the one hand, the pulley 28 guiding the cable distribution 51 and, on the other hand, the two punches 16, is placed at the rear of the upper pylon.
  • each of the punches is articulated to a straightening sling 20, thus avoiding tilting of the punches towards the rear of the machine, the sling being connected to a straightening strut 23.
  • the top of the pylon is extended by two parts 29 forming a stop for the two punches, thus avoiding their tilting forward of the hoist.
  • Each of the beams of the jib foot 31 carries a return bridge 32 for straightening the boom.
  • a stop 33 based respectively on each of punches, thus avoiding the tilting of the jib foot 31 towards the rear of the machine lifting.
  • the return to articulated mode of the distributing boom is done by operating a traction on the cable 51.
  • the height of the profile of the dart 41 at the level of the articulation 45 is sufficient to act as a lever arm, thus allowing the release of the counter-dart 42 from the locking device 61.
  • the attachment point 48 of the tie rods 25 is situated at the level of articulation 45.
  • a cable 55 controlled for example using a winch placed on the turret 12 not shown in the drawing, is fixed near the end 44 of the counter-dart 42 and passes around a pulley 35 disposed under the two beams of the jib foot 31.
  • a simple pulling operation on this cable 55 first of all allows the dart 41 to be aligned with the arrow foot 31, then to guarantee the blocking of this alignment.
  • Figures 6 and 7a to 7c show in detail the elements constituting the blocking device 61 integral, on the one hand, with each of the two beams 31a and 31b of the jib foot 31 and, on the other hand, of the jib 42 of the dart 41 and cooperating together to keep the dart 41 and the arrow foot aligned 31.
  • each of the two beams 31a and 31b are mounted projecting and placed vis-à-vis respectively a part 62a and a part 62b.
  • a locking cylinder respectively 63a and 63b sliding in a horizontal transverse direction respectively within the housings 64a and 64b.
  • Lock cylinders are kept partly outside their housing under the action respectively springs 65a and 65b.
  • the operating mode of this locking device is all particularly detailed with regard to Figures 7a to 7c.
  • the dart 41 and the jib foot 31 are in the final phase alignment.
  • the end of the outer part of the two locking cylinders 33a and 63b comes into contact with the part 66.
  • the bevelled shape of the lateral faces of this part acting as a guide the locking cylinders are gradually slid into their respective housings 64a and 64b and the springs 65a and 65b are gradually compressed.
  • the alignment phase is continuing, the ends of the locking cylinders will be facing holes 67a and 67b respectively.
  • FIG. 8 represents, by a view of underneath, the dart and the jib foot in aligned position, the locking device 61 being locked.
  • the distributing boom can then operate in lifting mode.
  • two devices electromagnetic 69a and 69b are actuated to allow total removal of the two cylinders from locking 63a and 63b respectively of the holes 67a and 67b.
  • a pull on the distribution cable 51 makes it possible to break the alignment of the dart with the arrow foot.
  • the jib foot 31 consists of a single fork-shaped beam having a longitudinal slot 34 open at the end of the boom foot bearing the joint 45.
  • the length of this slot is sufficient for the counter-dart 42 can be accommodated there as shown in FIG. 10 of so as to allow alignment between the dart 41 and the jib foot 31.
  • a blocking device 61 similar to that of the first variant, ensures the alignment of the dart with the arrow foot.
  • the inclination of the distributing arrow obtained during the alignment of the distributor arrow and corresponding to position E is 7 ° above the horizontal.
  • a range of more than 24 meters corresponds to the maximum range that can be obtained with the lifting device of the invention.
  • Hook height is more than 24 meters.
  • the boom foot has a slot allowing the housing of all or part of the dart have just been illustrated in particular with a lifting machine whose the pylon is foldable.
  • the same versatility and performance similar to the distributing arrow are also obtained when replacing this foldable pylon by a conventional tower or by a telescopic pylon.
  • the next step is to release the tie rods 25.
  • FIG. 13 The folding of the pylon is illustrated in FIG. 13 using a succession of overlapping views. To clarify the drawing, we have not included the arrow dispenser in a folded and folded position on the upper pylon as described above.
  • the folded lifting device is placed on a carriage 71 and its carrier frame 11 is attached to the rear of a tractor 72.
  • the lifting device is placed on an articulated trailer 73 to a tractor 72.
  • the lifting device is placed in a known container 74 under the name of "marine container” and whose standard dimensions are 12040 millimeters for the length and 2450 millimeters for the height.
  • a vertical articulation 47 the counter-dart 42 has been folded back on itself, thus saving space this time in length.
  • the container can then be transported in a conventional manner, for example on a flatbed trailer 75.
  • the lifting device according to the invention has been described with a carrying frame 11 resting on the ground. It is understood that it can also be mounted, whatever whatever the type of pylon that composes it, on a rolling carrying chassis, possibly self-propelled.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

The crane consists of a jib arm (31) mounted on the top of a mast (21, 22) and a jib head member (41) connected to the end of the arm by a pivot (45). The jib is supported by at least one stanchion (16) and a backstay (25), while the head member is divided by its pivot into a tip (43) carrying the load suspension assembly (53, 54), and a counter- member (42) which is connected to the stanchion. The movement of the head member relative to the jib arm is controlled by at least one transmission cable (51) fastened to the end of the head member and passing over the top of the mast. In addition, the jib arm can have a lengthwise channel of sufficient size to accommodate all or part of the head member.

Description

La présente invention concerne un engin de levage à flèche distributrice travaillant en mode articulé ou en mode relevable pour le levage et la manutention de charges, selon le préambule de la revendication 1.The present invention relates to a lifting device with a distribution boom working in articulated mode or in lifting mode for lifting and handling of charges, according to the preamble of claim 1.

Pour permettre la manutention de charges sur des chantiers de construction, on utilise habituellement des grues à flèche distributrice horizontale orientable sur laquelle coulisse un chariot servant de guide à des moyens de suspension.To allow handling of loads on construction sites, we usually use cranes with horizontal distributing boom which slides a carriage serving as a guide for suspension means.

Dans certaines circonstances, parfois très spécifiques, comme par exemple lorsque les chantiers sont encombrés ou lorsque la législation nationale interdit le survol de parcelles jouxtant le chantier, on leur préfère soit des grues à flèche distributrice relevable et orientable, soit des grues à flèche distributrice articulée orientable. Les grues à flèche distributrice relevable ont de plus l'avantage, par rapport aux grues à flèche horizontale de hauteurs de pylône comparables, de pouvoir amener des charges à de plus grandes hauteurs.In certain circumstances, sometimes very specific, such as for example when construction sites are congested or when national law prohibits overview of plots adjoining the site, we prefer either boom cranes hinged and swiveling vending machine, i.e. articulated jib cranes adjustable. Lifting distribution boom cranes also have the advantage, for compared to horizontal jib cranes of comparable pylon heights, ability to bring loads to greater heights.

Toutefois, ces deux types de grues présentent certains inconvénients par rapport aux grues à flèche horizontale. D'une part, leurs portées minimales étant relativement élevées, la manipulation de charges à proximité immédiate de la base des grues ne peut être assurée. D'autre part, il est très difficile de contrôler la régularité de la vitesse de distribution des charges qui permet d'éviter tout balancement intempestif.However, these two types of cranes have certain disadvantages by compared to horizontal boom cranes. On the one hand, their minimum ranges being relatively high, handling loads close to the base cranes cannot be insured. On the other hand, it is very difficult to control the regularity of the speed of distribution of the loads which makes it possible to avoid any untimely swaying.

Le brevet FR 2605619 décrit une grue qui combine les effets d'une grue à flèche distributrice articulée avec ceux d'une grue à flèche distributrice relevable, lui conférant ainsi une certaine polyvalence. De plus, la grue décrite a l'avantage d'être dépliable et repliable et ceci de façon automatique.Patent FR 2605619 describes a crane which combines the effects of a crane with distributor boom articulated with those of a lifting distributor boom crane, thus giving a certain versatility. In addition, the crane described has the advantage of being unfoldable and foldable and this automatically.

Toutefois, du fait du mode de conception et de commande des articulations de la flèche distributrice, cette grue possède toujours une portée minimale importante. De plus, le gain de hauteur sous crochet obtenu lorsque la pointe de la flèche est relevée reste relativement faible, ne pouvant dépasser une amplitude angulaire équivalente à 30° par rapport à l'horizontale. However, because of the design and control of the joints of the distributing boom, this crane always has a minimum reach important. In addition, the height gain under hook obtained when the tip of the arrow is raised remains relatively small, cannot exceed an amplitude angular equivalent to 30 ° from the horizontal.

D'autre part, lorsque cette grue est repliée et posée sur un châssis porteur roulant, spécialement conçu pour son transport, l'ensemble routier ainsi formé est tout juste admis à passer sous un gabarit de 4 mètres, l'autorisant à accéder sur le réseau routier. Toutefois, cet ensemble ne peut pas circuler sur certains axes secondaires à gabarit restreint.On the other hand, when this crane is folded up and placed on a supporting frame rolling, specially designed for its transport, the road assembly thus formed is just admitted to pass under a 4-meter template, authorizing him to access the road network. However, this set cannot circulate on certain axes secondary with restricted gauge.

La présente invention a pour but la réalisation d'un engin de levage à flèche distributrice orientable polyvalente, pouvant tout aussi bien être utilisé comme une grue à flèche distributrice relevable que comme une grue à flèche distributrice articulée, la transformation d'une fonction à l'autre devant se faire le plus simplement possible.The object of the present invention is to produce a jib lifting device versatile swivel dispenser, which can just as easily be used as a lifting jib crane only as a jib crane articulated, the transformation from one function to another must be done the most simply possible.

La présente invention a également pour but la réalisation d'un engin de levage à flèche distributrice orientable polyvalente qui, lorsqu'il travaille comme une grue à flèche distributrice articulée, possède une portée minimale très faible.The object of the present invention is also to produce a multipurpose swiveling distributing boom lift which, when working as a articulated distributor boom crane, has a very small minimum reach.

La présente invention a encore pour but la réalisation d'un engin de levage à flèche distributrice orientable polyvalente capable de distribuer une charge avec une vitesse régulière, en particulier avec une vitesse horizontale constante lorsqu'il travaille comme une grue à flèche distributrice articulée.Another object of the present invention is to produce a lifting machine with Versatile orientable distributor boom capable of distributing a load with a regular speed, in particular with a constant horizontal speed when works like an articulated jib crane.

La présente invention a aussi pour but la réalisation d'un engin de levage à flèche distributrice orientable polyvalente qui, lorsque la flèche est articulée sur un pylône articulé, puisse être replié de manière la plus compacte possible de telle sorte qu'il puisse être placé dans un conteneur de type marin en vue de son transport.The present invention also aims to achieve a lifting machine to versatile orientable distributor boom which, when the boom is articulated on a articulated pylon, can be folded up as compactly as possible so that it can be placed in a marine-type container for its transport.

A cet effet, la présente invention a pour objet un engin de levage à flèche distributrice orientable travaillant en mode articulé ou en mode relevable pour le levage et la manutention de charges tel que défini à la revendication 1, les revendications dépendantes 2 à 12 précisant les caractéristiques des différentes variantes de cet engin.To this end, the present invention relates to a boom lifting device swiveling distributor working in articulated mode or in lifting mode for the lifting and handling of loads as defined in claim 1, the dependent claims 2 to 12 specifying the characteristics of the different variants of this craft.

Afin rendre facile la compréhension de l'invention, un dessin représentant un mode de réalisation d'un engin de levage selon l'invention est présenté. Cela n'en limite pas pour autant la portée de cette invention. In order to make it easier to understand the invention, a drawing representing a embodiment of a lifting device according to the invention is presented. It does does not limit the scope of this invention.

Sur ce dessin,

  • la figure 1 représente en perspective une première variante de l'engin de levage avec une flèche distributrice en position de travail en mode articulé et, en arrière plan, en mode relevable;
  • la figure 2 représente, par des vues superposées en élévation, différentes phases de fonctionnement de la première variante de l'engin de levage avec une flèche distributrice en position de travail en mode articulé;
  • la figure 3 représente, par une vue partielle en élévation, le détail de l'articulation entre le pylône et la flèche distributrice de la première variante de l'engin de levage;
  • les figures 4a à 4d représentent, par des vues en élévation, les différentes étapes de transformation du mode articulé au mode relevable de la flèche distributrice de la première variante de l'engin de levage;
  • la figure 5 représente, par une vue en élévation, la flèche distributrice d'une deuxième variante de l'engin de levage;
  • la figure 6 représente, par une vue en perspective, le détail du dispositif pour le blocage de la flèche distributrice en position de travail en mode relevable de la première variante de l'engin de levage;
  • les figures 7a à 7c représentent, par des vues en coupe, les différentes étapes de fonctionnement du dispositif de blocage de la figure 6;
  • la figure 8 représente, par une vue de dessous, le détail de l'articulation et du dispositif de blocage entre le pied de flèche et la fléchette de la première variante de l'engin de levage;
  • la figure 9 représente en perspective une troisième variante de l'engin de levage avec une flèche distributrice en position de travail en mode articulé et, en arrière plan, en mode relevable;
  • la figure 10 représente, par une vue de dessous, le détail de l'articulation et du dispositif de blocage entre le pied de flèche et la fléchette de la troisième variante de l'engin de levage;
  • la figure 11 représente, par des vues superposées en élévation, différentes phases de fonctionnement de la première variante de l'engin de levage avec une flèche distributrice en position de travail en mode relevable;
  • la figure 12 représente, par une vue en élévation, la première variante de l'engin de levage ayant une flèche distributrice en position repliée le long du pylône;
  • la figure 13 représente, par des vues superposées en élévation, différentes étapes du repliage de la première variante de l'engin de levage;
  • la figure 14 représente, par une vue en élévation, la première variante de l'engin de levage en position repliée; et
  • les figures 15a à 15c représentent, par des vues en élévation, différents moyens pour transporter la première variante de l'engin de levage.
On this drawing,
  • Figure 1 shows in perspective a first variant of the lifting device with a distributor boom in the working position in articulated mode and, in the background, in lifting mode;
  • FIG. 2 represents, by superimposed views in elevation, different phases of operation of the first variant of the lifting machine with a distributor boom in the working position in articulated mode;
  • FIG. 3 shows, in a partial elevation view, the detail of the articulation between the pylon and the distributing jib of the first variant of the lifting machine;
  • FIGS. 4a to 4d represent, in elevation views, the different stages of transformation from the articulated mode to the lifting mode of the distributing boom of the first variant of the lifting machine;
  • Figure 5 shows, in an elevational view, the distributor boom of a second variant of the lifting device;
  • FIG. 6 shows, in a perspective view, the detail of the device for blocking the dispensing boom in the working position in lifting mode of the first variant of the lifting machine;
  • Figures 7a to 7c show, in sectional views, the different stages of operation of the locking device of Figure 6;
  • FIG. 8 shows, in a view from below, the detail of the articulation and of the locking device between the jib foot and the jib of the first variant of the lifting machine;
  • FIG. 9 is a perspective view of a third variant of the lifting device with a distributor boom in the working position in articulated mode and, in the background, in lifting mode;
  • Figure 10 shows, in a bottom view, the detail of the joint and the locking device between the boom foot and the dart of the third variant of the lifting machine;
  • FIG. 11 represents, by superimposed views in elevation, different phases of operation of the first variant of the lifting machine with a distributing boom in the working position in lifting mode;
  • Figure 12 shows, in an elevational view, the first variant of the lifting device having a distributing boom in the folded position along the pylon;
  • FIG. 13 represents, by superimposed views in elevation, different stages of the folding of the first variant of the lifting machine;
  • Figure 14 shows, in an elevational view, the first variant of the lifting device in the folded position; and
  • Figures 15a to 15c show, in elevation views, different means for transporting the first variant of the lifting device.

La première variante de l'engin de levage à flèche distributrice orientable travaillant en mode articulé ou en mode relevable pour le levage et la manutention de charges telle que représentée à la figure 1 comporte un pylône repliable constitué de deux tronçons articulés l'un à l'autre, à savoir un pied de pylône 21 et un pylône supérieur 22. Le pied de pylône est monté pivotant autour d'un axe horizontal sur la partie avant d'un châssis tournant ou tourelle 12. Le pylône supérieur porte pivotant autour d'une articulation horizontale 26, d'une part, une flèche distributrice 31, 41 articulée et relevable et, d'autre part, deux poinçons symétriques 16 reliés à leur extrémité par un axe portant deux poulies 17. La tourelle 12 est montée pivotante autour d'un axe vertical sur un châssis porteur 11.The first variant of the lifting device with swiveling distributing jib working in articulated mode or in lifting mode for lifting and handling of loads as shown in Figure 1 has a collapsible pylon consisting of two sections articulated to each other, namely a pylon base 21 and an upper pylon 22. The pylon foot is pivotally mounted about an axis horizontal on the front part of a rotating chassis or turret 12. The pylon upper door pivoting around a horizontal articulation 26, on the one hand, a articulated and lifting distributing boom 31, 41 and, on the other hand, two punches symmetrical 16 connected at their ends by an axis carrying two pulleys 17. The turret 12 is pivotally mounted about a vertical axis on a carrying frame 11.

Le pylône est maintenu en position de travail de manière habituelle grâce à un ensemble d'éléments constitué d'un lest 13 fixé sur la partie arrière de la tourelle 12, de contrefiches de redressage 23 reliant le pylône à la tourelle, de deux tirants 25, tous reliés à un dispositif de commande non représenté sur le dessin, pouvant être par exemple un treuil placé sur la tourelle 12, les deux tirants passant respectivement sur les deux poulies 17 des poinçons 16.The pylon is kept in the usual working position thanks to a set of elements consisting of a ballast 13 fixed on the rear part of the turret 12, straightening struts 23 connecting the pylon to the turret, two tie rods 25, all connected to a control device not shown in the drawing, capable of be for example a winch placed on the turret 12, the two tie rods passing respectively on the two pulleys 17 of the punches 16.

La flèche distributrice articulée et relevable est constituée de deux pièces maítresses, à savoir un pied de flèche 31 et une fléchette 41, articulées l'une à l'autre. The articulated and lifting distributor boom consists of two parts masters, namely an arrow foot 31 and a dart 41, articulated one to the other.

L'extrémité inférieure du pied de flèche 31 est reliée, par intermédiaire de l'articulation horizontale 26, au sommet du pylône supérieur 22. L'autre extrémité du pied de flèche est reliée, par l'intermédiaire d'une articulation horizontale 45, à la fléchette 41. L'articulation 45 divise la fléchette 41 en deux parties dissymétriques, à savoir une contrefléchette 42, portant à son extrémité deux poulies 44, et une pointe de fléchette 43, portant à son extrémité 46 deux poulies guidant des moyens de suspension de charge constitués d'un câble de levage 53, d'une moufle et d'un crochet de levage 54.The lower end of the jib foot 31 is connected, by means of the horizontal joint 26, at the top of the upper pylon 22. The other end of the boom foot is connected, via a horizontal articulation 45, to the dart 41. The articulation 45 divides the dart 41 into two asymmetrical parts, namely a dart 42, carrying at its end two pulleys 44, and a dart point 43, carrying at its end 46 two pulleys guiding means load suspension consisting of a lifting cable 53, a muffle and a lifting hook 54.

Telle que présentée au premier plan de la figure 1, lorsque l'extrémité 46 de la pointe de fléchette 43 se trouve en position A, la flèche distributrice se trouve en position de travail en mode articulé. Les tirants 25 passent successivement dans les gorges des poulies 17 des deux poinçons 16, puis dans celles des deux poulies 44 de la contrefléchette 42, et sont fixés sur la fléchette 41. Les tirants 25 forment avec le pied de flèche 31, les deux poinçons 16 et la contrefléchette 42 un quadrilatère déformable. Cette configuration géométrique, connue de l'art antérieur, permet à l'extrémité 46 de la pointe de la fléchette 43 de couvrir une surface approximativement plane et horizontale.As shown in the foreground of Figure 1, when the end 46 of the dart point 43 is in position A, the distributor arrow is in working position in articulated mode. The tie rods 25 pass successively through the grooves in the pulleys 17 of the two punches 16, then in those of the two pulleys 44 of the jib 42, and are fixed on the dart 41. The tie rods 25 form with the arrow foot 31, the two punches 16 and the counter-dart 42 a quadrilateral deformable. This geometric configuration, known from the prior art, allows the end 46 of the tip of the dart 43 to cover a surface approximately flat and horizontal.

En arrière plan de la figure 1, lorsque l'extrémité 46 de la pointe de fléchette 43 se trouve en position B, la flèche distributrice se trouve en position de travail en mode relevable. La fléchette 41 se trouve alignée avec le pied de flèche 31. On constate que les tirants 25 sont fixés sur la fléchette 41, à proximité de l'extrémité 46 de la pointe de fléchette 43. Dans cette configuration, ces tirants 25 ne passent plus que sur les poulies 17 des deux poinçons 16, et forment à présent un triangle avec les deux poinçons 16 et l'ensemble aligné pied de flèche 31 - fléchette 41.In the background of Figure 1, when the end 46 of the dart point 43 is in position B, the distributor boom is in the working position in lift mode. The dart 41 is aligned with the arrow foot 31. We notes that the tie rods 25 are fixed on the dart 41, near the end 46 of the dart point 43. In this configuration, these tie rods 25 do not pass more than on the pulleys 17 of the two punches 16, and now form a triangle with the two punches 16 and the aligned arrow foot 31 - dart 41 assembly.

Grâce à la perspective de la figure 1 présentant en particulier la flèche distributrice en position de travail en mode relevable, on constate nettement que le pied de fléchette 31 est en fait constitué de deux poutres parallèles 31a et 31b montées latéralement de part et d'autre, d'une part, du pylône supérieur 22, et, d'autre part, de la fléchette 41.Thanks to the perspective of FIG. 1 presenting in particular the arrow dispenser in the working position in lifting mode, we clearly see that the dart foot 31 is in fact made up of two parallel beams 31a and 31b laterally mounted on either side, on the one hand, of the upper pylon 22, and, on the other hand, of the dart 41.

On peut tout de suite constater l'intérêt d'une telle construction à deux poutres. En effet, la contrefléchette 42 peut se loger au sein de la fente ou de l'écartement 34 généré entre ces deux poutres 31a et 31b et un alignement parfait de la fléchette 41 avec le pied de flèche 31 est alors obtenu, ce qui, comme nous le verrons ci-dessous, permet un gain de hauteur sous crochet important par rapport aux flèches polyvalentes de l'art antérieur qui possèdent une forme coudée.We can immediately see the interest of such a construction for two beams. Indeed, the counter-dart 42 can be housed within the slot or the spacing 34 generated between these two beams 31a and 31b and perfect alignment of the dart 41 with the arrow foot 31 is then obtained, which, as we see below, allows a significant gain in height under hook compared to to the versatile arrows of the prior art which have a bent shape.

De plus, une telle construction à deux poutres renforce la structure de l'engin de levage en offrant une meilleure résistance à la torsion.In addition, such a construction with two beams strengthens the structure of the machine lifting while offering better resistance to torsion.

La figure 2 présente différentes phases du fonctionnement de la flèche distributrice en mode articulé.Figure 2 shows different phases of boom operation distributor in articulated mode.

Le mouvement général de l'ensemble des articulations, régit par la géométrie particulière du quadrilatère (44, 45, 26, 17), est connu de l'art antérieur. Il est toutefois important de commenter certaines des phases de ce mouvement afin de mettre particulièrement en évidence le rôle joué par deux des éléments de l'engin de levage, à savoir le système de commande du mouvement et la fente générée par les deux poutres du pied de flèche.The general movement of all the joints, governed by the geometry particular of the quadrilateral (44, 45, 26, 17), is known from the prior art. It is however important to comment on some of the phases of this movement in order to highlight in particular the role played by two of the elements of the machine lifting, namely the movement control system and the generated slit by the two beams of the boom foot.

Partons tout d'abord de la configuration dans laquelle l'extrémité 46 de la pointe de fléchette 43 se trouve en position A et qui correspond à la configuration en mode articulé présentée précédemment en perspective au regard de la figure 1.Let's start with the configuration in which the end 46 of the dart tip 43 is in position A and corresponds to the configuration in articulated mode presented previously in perspective with regard to FIG. 1.

Le dispositif commandant les tirants 25 a été préalablement bloqué de façon à maintenir constante la distance entre les poulies 17 et 44 pendant toutes les phases de l'articulation de la flèche distributrice.The device controlling the tie rods 25 has been previously blocked so keep the distance between the pulleys 17 and 44 constant during all phases of the articulation of the distributing arrow.

Un câble de distribution 51, fixé à l'extrémité 46 de la fléchette, passe dans la gorge d'une poulie 28 placée au sommet du pylône supérieur 22 et est relié à un dispositif de commande non représenté sur le dessin, pouvant être par exemple un treuil placé sur la tourelle 12, et qui permet de faire varier la longueur de ce câble.A distribution cable 51, fixed to the end 46 of the dart, passes through the groove of a pulley 28 placed at the top of the upper pylon 22 and is connected to a control device not shown in the drawing, which may for example be a winch placed on the turret 12, and which makes it possible to vary the length of this cable.

Afin d'amener l'extrémité 46 de la pointe de fléchette 43 vers la position D correspondant à la portée minimale de l'engin de levage, on opère, par l'intermédiaire de son dispositif de commande, une simple traction sur le câble de distribution 51. Le crochet de levage 54 se rapproche progressivement du pylône.In order to bring the end 46 of the dart point 43 to position D corresponding to the minimum reach of the lifting machine, we operate, by through its control device, a simple pull on the cable distribution 51. The lifting hook 54 progressively approaches the pylon.

Du fait du mode simple de commande de la traction du câble de distribution 51, il devient facile de contrôler la régularité de la vitesse de translation de l'extrémité 46 de la pointe de fléchette et d'éviter ainsi tout balancement intempestif de la charge au cours de sa manipulation. Due to the simple mode of control of the traction of the distribution cable 51, it becomes easy to control the regularity of the translation speed of the end 46 of the dart point and thus avoid any untimely swaying of the load during its handling.

L'extrémité 46 de la pointe de fléchette 43 passe par la position intermédiaire C, correspondant approximativement à la position de portée minimale qui était obtenue avec les engins de levage de l'art antérieur.The end 46 of the dart point 43 passes through the intermediate position C, approximately corresponding to the minimum span position which was obtained with the lifting devices of the prior art.

Maintenant, du fait de présence de la fente ou écartement 34 entre les deux poutres 31a et 31b du pied de flèche 31 qui permet à la pointe de la fléchette 43 de s'y loger, la traction sur le câble 51 peut se poursuivre jusqu'à amener l'extrémité 46 de la pointe de fléchette 43 à la position D, tout contre le pied de flèche. Cette position D correspond à la portée minimale de l'engin de levage.Now, due to the presence of the slot or spacing 34 between the two beams 31a and 31b of the jib foot 31 which allows the tip of the dart 43 to lodge there, the traction on the cable 51 can continue until bringing the end 46 from the dart point 43 in position D, all against the arrow foot. This position D corresponds to the minimum reach of the hoist.

Dans cette position, la figure 3 présente, de façon détaillée, l'agencement des différents éléments au sommet du pylône supérieur 22. On constate que l'articulation 26, supportant le pied de flèche 31, est placée à l'avant du pylône supérieur. Une articulation 27, supportant, d'une part, la poulie 28 guidant le câble de distribution 51 et, d'autre part, les deux poinçons 16, est placée à l'arrière du pylône supérieur.In this position, Figure 3 shows, in detail, the arrangement different elements at the top of the upper pylon 22. It can be seen that the articulation 26, supporting the jib foot 31, is placed at the front of the pylon superior. A joint 27, supporting, on the one hand, the pulley 28 guiding the cable distribution 51 and, on the other hand, the two punches 16, is placed at the rear of the upper pylon.

L'extrémité de chacun des poinçons, opposée à celle portant les poulies 17, est montée en articulation à une élingue de redressage 20, évitant ainsi le basculement des poinçons vers l'arrière de l'engin, l'élingue étant reliée à une contrefiche de redressement 23. Le sommet du pylône est prolongé par deux pièces 29 formant butée pour les deux poinçons, évitant ainsi leur basculement vers l'avant de l'engin de levage. Chacune des poutres du pied de flèche 31 porte un chevalet de renvoi 32 destiné au redressement de la flèche. Sur chacun de ces chevalets se trouve une butée 33 s'appuyant respectivement sur chacun des poinçons, évitant ainsi le basculement du pied de flèche 31 vers l'arrière de l'engin de levage.The end of each of the punches, opposite to that carrying the pulleys 17, is articulated to a straightening sling 20, thus avoiding tilting of the punches towards the rear of the machine, the sling being connected to a straightening strut 23. The top of the pylon is extended by two parts 29 forming a stop for the two punches, thus avoiding their tilting forward of the hoist. Each of the beams of the jib foot 31 carries a return bridge 32 for straightening the boom. On each of these easels is a stop 33 based respectively on each of punches, thus avoiding the tilting of the jib foot 31 towards the rear of the machine lifting.

Partant de cette position D correspondant à la portée minimale et pour revenir à la position A initialement décrite, il suffit de relâcher le câble de distribution 51, tout en maintenant le blocage du dispositif de commande des tirants 25. Sous le seul effet de la gravité, l'extrémité 46 de la pointe de la fléchette 43 s'éloigne progressivement du sommet du pylône supérieur 22.Starting from this position D corresponding to the minimum range and for return to position A initially described, just release the distribution cable 51, while maintaining the locking of the tie rod control device 25. Under the only effect of gravity, the end 46 of the tip of the dart 43 moves away gradually from the top of the upper pylon 22.

A partir de la position A et en poursuivant le relâchement du câble de distribution 51, toujours en maintenant le blocage du dispositif de commande des tirants 25, on commence la transformation du mode articulé en mode relevable de la flèche distributrice.From position A and continuing to release the cable distribution 51, still maintaining the blocking of the device for controlling the tie rods 25, the transformation from articulated mode to liftable mode begins the distributing arrow.

Comme cela est symbolisé par les flèches blanches de la figure 4a, le pied de flèche 31 s'affaisse et l'extrémité 46 de la pointe de la fléchette se redresse. A la figure 4b, les tirants 25 se trouvent presque alignés avec la fléchette 41. A la figure 4c, le pied de flèche poursuit sa descente, les tirants 25 sont alors désolidarisés des poulies 44 de la contrefléchette 42.As symbolized by the white arrows in Figure 4a, the foot arrow 31 collapses and the tip 46 of the tip of the dart straightens. To the Figure 4b, the tie rods 25 are almost aligned with the dart 41. In Figure 4c, the jib foot continues its descent, the tie rods 25 are then separated pulleys 44 of the counter-dart 42.

Enfin, à la figure 4d, le câble de distribution 51 est totalement relâché. La fléchette 41 se trouve parfaitement alignée avec le pied de flèche 31, un dispositif de blocage 61, présenté ci-après, permettant de maintenir cet alignement. La flèche distributrice se trouve alors en position de travail en mode relevable. L'extrémité 46 de la pointe de fléchette 43 se trouvant à la position E, la flèche distributrice se trouve déjà inclinée de quelques degré par rapport à l'horizontale.Finally, in FIG. 4d, the distribution cable 51 is completely relaxed. The dart 41 is perfectly aligned with arrow foot 31, a device blocking 61, presented below, to maintain this alignment. The arrow vending machine is then in the working position in lifting mode. The end 46 of the dart point 43 being in position E, the distributor arrow is is already inclined a few degrees from the horizontal.

Le retour en mode articulé de la flèche distributrice se fait en opérant une traction sur le câble 51. La hauteur du profil de la fléchette 41 au niveau de l'articulation 45 est suffisante pour jouer le rôle de bras de levier, permettant ainsi la libération de la contrefléchette 42 du dispositif de blocage 61.The return to articulated mode of the distributing boom is done by operating a traction on the cable 51. The height of the profile of the dart 41 at the level of the articulation 45 is sufficient to act as a lever arm, thus allowing the release of the counter-dart 42 from the locking device 61.

Sur la figure 4d, la position du point d'attache 48 des tirants 25 sur la pointe de la fléchette 43 devient apparente. Il a été trouvé que, lorsque ce point d'attache 48 est situé à un point quelconque entre l'extrémité 46 de la pointe de la fléchette 43 et le centre de gravité de la fléchette 41, le seul effet de la gravité permettait la réalisation de toutes les étapes de la transformation de la flèche.In FIG. 4d, the position of the attachment point 48 of the tie rods 25 on the tip of the dart 43 becomes apparent. It has been found that when this attachment point 48 is located at any point between the end 46 of the tip of the dart 43 and the center of gravity of the dart 41, the only effect of gravity allowed the completion of all stages of the boom transformation.

En revanche, lorsque le point d'attache 48 des tirants 25 se trouve à un point quelconque entre l'articulation 45 et le centre de gravité de la fléchette 41, il est nécessaire, pour obtenir l'alignement de la fléchette 41 avec le pied de flèche 31, d'avoir recours à un câble auxiliaire. Une telle variante de l'engin de levage de l'invention est présentée à la figure 5.On the other hand, when the attachment point 48 of the tie rods 25 is at a point between the joint 45 and the center of gravity of the dart 41, it is necessary, to obtain the alignment of the jib 41 with the jib foot 31, to use an auxiliary cable. Such a variant of the lifting device of the invention is shown in Figure 5.

Sur cette figure 5, le point d'attache 48 des tirants 25 se situe au niveau de l'articulation 45. Un câble 55, commandé par exemple à l'aide d'un treuil placé sur la tourelle 12 non représenté sur le dessin, est fixé à proximité de l'extrémité 44 de la contrefléchette 42 et passe autour d'une poulie 35 disposée sous les deux poutres du pied de flèche 31. Une simple opération de traction sur ce câble 55 permet tout d'abord d'aligner la fléchette 41 avec le pied de flèche 31, puis de garantir le blocage de cet alignement.In this FIG. 5, the attachment point 48 of the tie rods 25 is situated at the level of articulation 45. A cable 55, controlled for example using a winch placed on the turret 12 not shown in the drawing, is fixed near the end 44 of the counter-dart 42 and passes around a pulley 35 disposed under the two beams of the jib foot 31. A simple pulling operation on this cable 55 first of all allows the dart 41 to be aligned with the arrow foot 31, then to guarantee the blocking of this alignment.

Les figures 6 et 7a à 7c présentent en détail les éléments constituant le dispositif de blocage 61 solidaires, d'une part, de chacune des deux poutres 31a et 31b du pied de flèche 31 et, d'autre part, de la contrefléchette 42 de la fléchette 41 et coopérant ensemble afin de maintenir alignés la fléchette 41 et le pied de flèche 31.Figures 6 and 7a to 7c show in detail the elements constituting the blocking device 61 integral, on the one hand, with each of the two beams 31a and 31b of the jib foot 31 and, on the other hand, of the jib 42 of the dart 41 and cooperating together to keep the dart 41 and the arrow foot aligned 31.

Dans ce dispositif, sous chacune des deux poutres 31a et 31b sont montées en saillies et placées en vis-à-vis respectivement une pièce 62a et une pièce 62b. Dans chacune de ces deux pièces se trouve un cylindre de verrouillage respectivement 63a et 63b coulissant dans une direction transversale horizontale respectivement au sein des logements 64a et 64b. Les cylindres de verrouillage sont maintenus en partie à l'extérieur de leur logement sous l'action respectivement des ressorts 65a et 65b.In this device, under each of the two beams 31a and 31b are mounted projecting and placed vis-à-vis respectively a part 62a and a part 62b. In each of these two parts is a locking cylinder respectively 63a and 63b sliding in a horizontal transverse direction respectively within the housings 64a and 64b. Lock cylinders are kept partly outside their housing under the action respectively springs 65a and 65b.

Sous la contrefléchette 42 se trouve, montée en saillie, une pièce 66, dont les deux faces latérales sont biseautées. Deux forures 67a et 67b, destinées à servir respectivement de logement à la partie externe de chacun des cylindres de verrouillage 63a et 63b, ont été pratiquées respectivement sur les deux faces latérales de la pièce 66.Under the counter-dart 42 is mounted, projecting, a part 66, of which the two side faces are bevelled. Two holes 67a and 67b, intended for serve respectively as housing for the external part of each of the cylinders locking 63a and 63b, were practiced respectively on the two faces side of room 66.

Le mode de fonctionnement de ce dispositif de verrouillage est tout particulièrement détaillé au regard des figures 7a à 7c. Dans la position représentée à la figure 7a, la fléchette 41 et le pied de flèche 31 se trouvent en phase finale d'alignement. L'extrémité de la partie externe des deux cylindres de verrouillage 33a et 63b entre en contact la pièce 66. La forme biseautée des faces latérales de cette pièce jouant le rôle de guide, les cylindres de verrouillage sont progressivement introduits en coulissant au sein de leurs logements respectifs 64a et 64b et les ressorts 65a et 65b sont progressivement comprimés. La phase d'alignement se poursuivant, les extrémités des cylindres de verrouillage vont se trouver au regard respectivement des forures 67a et 67b.The operating mode of this locking device is all particularly detailed with regard to Figures 7a to 7c. In the position shown in FIG. 7a, the dart 41 and the jib foot 31 are in the final phase alignment. The end of the outer part of the two locking cylinders 33a and 63b comes into contact with the part 66. The bevelled shape of the lateral faces of this part acting as a guide, the locking cylinders are gradually slid into their respective housings 64a and 64b and the springs 65a and 65b are gradually compressed. The alignment phase is continuing, the ends of the locking cylinders will be facing holes 67a and 67b respectively.

Grâce à deux butées 68a et 68b, placées respectivement de part et d'autre de la pièce 66, l'alignement de la fléchette avec le pied de flèche est obtenu. A cette position particulière représentée à la figure 7c et sous l'action des ressorts 65a et 65b, les cylindres de verrouillages 63a et 63b s'engagent respectivement dans les deux forures 67a et 67b, assurant ainsi le verrouillage en position alignée de la fléchette avec le pied de flèche. La figure 8 représente, par une vue de dessous, la fléchette et le pied de flèche en position alignée, le dispositif de blocage 61 étant verrouillé. La flèche distributrice peut alors fonctionner en mode relevable.Thanks to two stops 68a and 68b, placed on each side respectively from part 66, the alignment of the dart with the jib foot is obtained. AT this particular position represented in FIG. 7c and under the action of the springs 65a and 65b, the locking cylinders 63a and 63b engage respectively in the two holes 67a and 67b, thus ensuring locking in the aligned position of the dart with the arrow foot. FIG. 8 represents, by a view of underneath, the dart and the jib foot in aligned position, the locking device 61 being locked. The distributing boom can then operate in lifting mode.

Pour repasser en mode de travail articulé, deux dispositifs électromagnétiques 69a et 69b, solidaires respectivement des deux pièces 62a et 62b, sont actionnés afin de permettre le retrait total des deux cylindres de verrouillage 63a et 63b respectivement des forures 67a et 67b. Comme nous l'avons vu ci-dessus, une traction sur le câble de distribution 51 permet de rompre l'alignement de la fléchette avec le pied de flèche.To return to articulated working mode, two devices electromagnetic 69a and 69b, respectively secured to the two parts 62a and 62b, are actuated to allow total removal of the two cylinders from locking 63a and 63b respectively of the holes 67a and 67b. Like us as seen above, a pull on the distribution cable 51 makes it possible to break the alignment of the dart with the arrow foot.

Dans une troisième variante de l'engin de levage, particulièrement avantageuse lorsque le pylône est une tour classique 21 telle que représentée à la figure 9, le pied de flèche 31 est constitué d'une seule poutre en forme de fourche comportant une fente longitudinale 34 ouverte à l'extrémité du pied de flèche portant l'articulation 45. La longueur de cette fente est suffisante pour que la contrefléchette 42 puisse s'y loger comme cela est représenté à la figure 10 de façon à permettre l'alignement entre la fléchette 41 et le pied de flèche 31. Un dispositif de blocage 61, similaire à celui de la première variante, assure l'alignement de la fléchette avec le pied de flèche.In a third variant of the lifting machine, particularly advantageous when the pylon is a conventional tower 21 as shown in the FIG. 9, the jib foot 31 consists of a single fork-shaped beam having a longitudinal slot 34 open at the end of the boom foot bearing the joint 45. The length of this slot is sufficient for the counter-dart 42 can be accommodated there as shown in FIG. 10 of so as to allow alignment between the dart 41 and the jib foot 31. A blocking device 61, similar to that of the first variant, ensures the alignment of the dart with the arrow foot.

Le travail en mode relevable de chacune des flèches distributrices des trois variantes précédemment décrites de l'engin de levage s'opère de manière identique. Une fois la fléchette 41 et le pied de flèche 31 alignés et cette position verrouillée, en opérant une traction sur les tirants 25, par exemple à l'aide d'un treuil placé sur la tourelle 12 et non représenté sur le dessin, on relève progressivement la flèche distributrice. La figure 11 présente différentes amplitudes susceptibles d'être obtenues.The work in lifting mode of each of the distributing arrows of the three previously described variants of the hoist is operated so identical. Once the dart 41 and the arrow foot 31 are aligned and this position locked, by pulling the tie rods 25, for example using a winch placed on the turret 12 and not shown in the drawing, we gradually note the distributing arrow. Figure 11 shows different amplitudes likely to be obtained.

L'inclinaison de la flèche distributrice obtenue lors de l'alignement de la flèche distributrice et correspondant à la position E est de 7° au-dessus de l'horizontale. Une portée de plus de 24 mètres correspond à la portée maximale que l'on peut obtenir avec l'engin de levage de l'invention. La hauteur sous crochet est de plus de 24 mètres. The inclination of the distributing arrow obtained during the alignment of the distributor arrow and corresponding to position E is 7 ° above the horizontal. A range of more than 24 meters corresponds to the maximum range that can be obtained with the lifting device of the invention. Hook height is more than 24 meters.

A la position F, une inclinaison maximale de la flèche de près de 80° est obtenue. La portée minimale est alors de 6 mètres et la hauteur sous crochet est de près de 42 mètres.At position F, a maximum tilt of the boom of nearly 80 ° is obtained. The minimum reach is then 6 meters and the height under hook is almost 42 meters.

De telles performances sont comparables à celles habituellement obtenues avec des grues à flèche distributrice fonctionnant uniquement en mode relevable.Such performances are comparable to those usually obtained with jib cranes operating only in lifting mode.

Certains des avantages obtenus en utilisant une flèche distributrice dont le pied de flèche possède une fente permettant le logement de tout ou partie de la fléchette viennent d'être illustrés tout particulièrement avec un engin de levage dont le pylône est repliable. Cependant, une même polyvalence et des performances semblables de la flèche distributrice sont également obtenues lorsque l'on remplace ce pylône repliable par une tour classique ou encore par un pylône télescopique.Some of the benefits of using a distributing boom, the boom foot has a slot allowing the housing of all or part of the dart have just been illustrated in particular with a lifting machine whose the pylon is foldable. However, the same versatility and performance similar to the distributing arrow are also obtained when replacing this foldable pylon by a conventional tower or by a telescopic pylon.

Un avantage supplémentaire offert par la flèche distributrice dont le pied de flèche est tout particulièrement constitué de deux poutres est toutefois obtenu avec un engin de levage ayant un pylône repliable. Il s'agit du gain de place obtenu lorsque l'engin de levage est totalement replié, autorisant ainsi une large variété de mode de transport.An additional advantage offered by the distributing boom whose foot arrow is particularly made up of two beams is however obtained with a hoist having a collapsible pylon. This is the space saved when the hoist is fully folded, allowing a wide variety of mode of transport.

Pour replier totalement l'engin de levage, il convient tout d'abord de placer la flèche distributrice en position de travail en mode articulé puis, en agissant sur le câble de distribution 51, d'amener l'extrémité 46 de la pointe de flèche 43 à la position D correspondant à la portée minimale. La pointe de flèche 43 se trouve alors logée entre les deux poutres du pied de flèche 31.To fully fold the hoist, first place the distributor boom in working position in articulated mode then, by acting on the distribution cable 51, to bring the end 46 of the arrowhead 43 to the position D corresponding to the minimum range. The arrowhead 43 is then housed between the two beams of the jib foot 31.

L'étape suivante consiste à relâcher les tirants 25. Le pied de flèche 31, encadrant la pointe de fléchette 43, bascule alors vers l'avant de l'engin de levage et vient s'appuyer le long du pylône supérieur 22, comme cela est illustré à la figure 12.The next step is to release the tie rods 25. The arrow foot 31, framing the dart point 43, then tilts towards the front of the lifting machine and comes to rest along the upper pylon 22, as illustrated in the figure 12.

Le repliage du pylône est illustré sur la figure 13 à l'aide d'une succession de vues superposées. Pour clarifier le dessin, nous n'avons pas fait figurer la flèche distributrice dans une position pliée et rabattue sur le pylône supérieur comme décrit ci-dessus.The folding of the pylon is illustrated in FIG. 13 using a succession of overlapping views. To clarify the drawing, we have not included the arrow dispenser in a folded and folded position on the upper pylon as described above.

En actionnant sur un vérin à double effet 18 qui s'appuie sur le pied de pylône 21 et agit sur un système de bielles 19, le pylône se plie autour d'une articulation horizontale 24 et s'incline grâce à la présence des contrefiches de redressage 23. Les élingues de redressage 20, chacune liée en articulation à l'extrémité d'un poinçon 16, font pivoter ces poinçons autour de l'articulation 27.By operating on a double-acting cylinder 18 which rests on the foot of pylon 21 and acts on a system of connecting rods 19, the pylon folds around a horizontal articulation 24 and tilts thanks to the presence of the struts straightening 23. The straightening slings 20, each linked in articulation to the end of a punch 16, rotate these punches around the articulation 27.

A la fin du processus de repliage, tous les éléments de l'engin de levage se trouvent à l'horizontale, le pylône supérieur 22 reposant sur le pied de pylône 21 et supportant la fléchette 41 encadrée par les deux poutres du pied de flèche 31, les poinçons 16 et les élingues de redressages 20 étant placés aux cotés de ces éléments. Cette configuration est représentée sur la figure 14.At the end of the folding process, all the elements of the lifting device are lie horizontally, the upper pylon 22 resting on the pylon foot 21 and supporting the dart 41 framed by the two beams of the jib foot 31, the punches 16 and the straightening slings 20 being placed alongside these elements. This configuration is shown in Figure 14.

Le fait que la fléchette 41 puisse être logée entre les poutres 31a et 31b du pied de flèche 31 permet d'obtenir un gain de place important en hauteur. Par la compacité de l'engin de levage en position repliée, de nombreuses possibilités de transport sont offertes, aucune ne nécessitant la construction spécifique d'un châssis porteur roulant. Les figures 15a à 15c illustrent certaines de ces possibilités.The fact that the dart 41 can be housed between the beams 31a and 31b of the boom 31 allows a significant gain in space to be obtained in height. Over there compactness of the hoist in the folded position, numerous possibilities for transport are offered, none requiring the specific construction of a rolling chassis. Figures 15a to 15c illustrate some of these opportunities.

Selon la figure 15a, l'engin de levage replié est posé sur un chariot 71 et son châssis porteur 11 est attaché à l'arrière d'un tracteur 72. Selon la figure 15b, l'engin de levage est posé sur une remorque articulée 73 à un tracteur 72.According to FIG. 15a, the folded lifting device is placed on a carriage 71 and its carrier frame 11 is attached to the rear of a tractor 72. According to FIG. 15b, the lifting device is placed on an articulated trailer 73 to a tractor 72.

Selon la figure 15c, l'engin de levage est placé dans un conteneur 74 connu sous le nom de "conteneur marin" et dont les dimensions normalisées sont de 12040 millimètres pour la longueur et de 2450 millimètres pour la hauteur. Auparavant et grâce à la présence d'une articulation verticale 47, la contrefléchette 42 a été repliée sur elle-même, offrant ainsi un gain de place cette fois en longueur. Le conteneur peut ensuite être transporté de manière classique, par exemple sur une remorque à plate-forme plane 75.According to FIG. 15c, the lifting device is placed in a known container 74 under the name of "marine container" and whose standard dimensions are 12040 millimeters for the length and 2450 millimeters for the height. Previously and thanks to the presence of a vertical articulation 47, the counter-dart 42 has been folded back on itself, thus saving space this time in length. The container can then be transported in a conventional manner, for example on a flatbed trailer 75.

L'engin de levage selon l'invention a été décrit avec un châssis porteur 11 reposant à même le sol. Il est bien entendu qu'il peut être également monté, quel que soit le type de pylône qui le compose, sur un châssis porteur roulant, éventuellement automoteur.The lifting device according to the invention has been described with a carrying frame 11 resting on the ground. It is understood that it can also be mounted, whatever whatever the type of pylon that composes it, on a rolling carrying chassis, possibly self-propelled.

Claims (13)

  1. A lifting machine with an orientable placing jib working in articulated mode or in liftable mode for lifting and handling loads comprising a jib foot (31) mounted in articulation at the top of a mast (21, 22), a jib head member (41) connected by an articulation (45) to the end of the jib foot, and a jib holding assembly comprising at least one stay (16) and at least one rear tie (25), the jib head member (41) being delimited by the articulation (45) in two parts, namely a counter jib head member (42) and a jib head member tip (43), the counter jib head member (42) being connected to the stay (16) by the rear tie (25) and the jib head member tip (43) carrying at its end (46) means (53, 54) for suspending the load, characterised in that the jib foot (31) and the jib head member (41) have such conjugate shapes that the jib head member tip (43) is aligned with the jib foot in working position in liftable mode.
  2. A lifting machine with a placing jib according to claim 1, characterised in that said conjugate shapes of the jib foot (31) and of the jib head member (41) are chosen such that the jib head member tip (43) comes against or within the jib foot (31) in folded position of the jib.
  3. A lifting machine with a placing jib according to claim 1 or 2, characterised in that the jib foot (31) comprises a longitudinal slot (34) over at least part of its length, said slot (34) being open at the end of the jib foot which carries the articulation (45) and having dimensions sufficient to allow all or part of the jib head member (41) to be housed within the jib foot.
  4. A lifting machine with a placing jib according to claim 3, characterised in that the slot (34) has dimensions sufficient to allow the counter jib head member (42) to be housed.
  5. A lifting machine with a placing jib according to one of claims 1 to 4, characterised in that the jib foot (31) comprises two parallel beams (31a, 31b) mounted laterally on either side on the one hand of the mast (21, 22) and on the other hand of the jib head member (41), so as to allow either the jib head member tip (43) or the counter jib head member (42) to be housed within the slot (34) formed between the two beams (31a, 31b).
  6. A lifting machine with a placing jib according to one of claims 1 to 5, characterised in that the tie (25) is fixed to the jib head member tip (43) at a point (48) situated between the end (46) of the jib head member tip (43) and the centre of gravity of the jib head member (41).
  7. A lifting machine with a placing jib according to one of claims 1 to 5, characterised in that the tie (25) is fixed to the jib head member tip (43) at a point (48) situated between the articulation (45) and the centre of gravity of the jib head member (41).
  8. A lifting machine with a placing jib according to one of claims 1 to 7, characterised in that it has a locking device comprising on the one hand two pieces (62a, 62b) fixed to the jib foot (31) and disposed opposite each other on either side of the slot (34), each of the said pieces being equipped with a sliding locking cylinder (63a, 63b), and on the other hand a counter piece (66) fixed to the counter jib head member (42) and having bevelled lateral faces each having a hole (67a, 67b), the assembly being arranged so that the cylinders (63a, 63b) can cooperate respectively with each of the holes when the jib head member is aligned with the jib foot.
  9. A lifting machine with a placing jib according to claim 1, characterised in that the relative movement of the jib head member with respect to the jib foot is controlled by at least one distribution cable (51) fixed to the end (46) of the jib tip and going to the top of the mast.
  10. A lifting machine with a placing jib according to claim 9, characterised in that a traction cable (55) is fixed in the vicinity of the end (44) of the counter jib head member (42) and passes around a pulley (35) mounted under the two beams (31a, 31b) of the jib foot, and in that the alignment and locking of the jib head member (41) with the jib foot (31) is performed by traction on said cable.
  11. A lifting machine with a placing jib according to one of the preceding claims, characterised in that the mast (21, 22) is a foldable mast or a telescopic mast.
  12. A lifting machine with a placing jib according to one of claims 1 to 8, characterised in that the mast (21, 22) is a tower.
  13. Use of a container (64) for the housing and transportation of a lifting machine with a placing jib according to one of claims 1 to 11.
EP99810483A 1999-06-02 1999-06-02 Articulated jib crane Expired - Lifetime EP1057776B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99810483A EP1057776B1 (en) 1999-06-02 1999-06-02 Articulated jib crane
DE69919517T DE69919517T2 (en) 1999-06-02 1999-06-02 Crane with articulated crane arm
AT99810483T ATE273921T1 (en) 1999-06-02 1999-06-02 CRANE WITH A CRANE ARM MADE OF LINKS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99810483A EP1057776B1 (en) 1999-06-02 1999-06-02 Articulated jib crane

Publications (2)

Publication Number Publication Date
EP1057776A1 EP1057776A1 (en) 2000-12-06
EP1057776B1 true EP1057776B1 (en) 2004-08-18

Family

ID=8242862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810483A Expired - Lifetime EP1057776B1 (en) 1999-06-02 1999-06-02 Articulated jib crane

Country Status (3)

Country Link
EP (1) EP1057776B1 (en)
AT (1) ATE273921T1 (en)
DE (1) DE69919517T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1514832A1 (en) 2003-09-15 2005-03-16 Jean-Marc Yerly Lifting device
CN102942125B (en) * 2012-12-12 2014-10-22 中联重科股份有限公司 Auxiliary jib tail frame, auxiliary jib comprising same and hoisting equipment
CN103410370B (en) * 2013-08-13 2015-07-01 中国建筑科学研究院建筑机械化研究分院 Tower body erecting and descending mechanism for tower crane and erecting and descending method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260733B (en) * 1966-05-04 1968-02-08 Herbert Biedermann Dipl Ing Luffing crane, especially tower crane
DE1531150A1 (en) * 1968-01-04 1969-12-11 Biedermann Dipl Ing Herbert Boom crane, especially tower crane, with luffing jib or retractable jib
FR2180614B2 (en) * 1972-04-20 1976-03-12 Loirecord
FR2548646B1 (en) * 1983-07-05 1985-12-13 Cadillon FAST FOLDING FOLDABLE CRANE
FR2605619B1 (en) * 1986-10-27 1989-03-31 Potain Sa FOLDABLE MACHINE FOR HANDLING AND LIFTING LOADS

Also Published As

Publication number Publication date
ATE273921T1 (en) 2004-09-15
EP1057776A1 (en) 2000-12-06
DE69919517T2 (en) 2005-09-29
DE69919517D1 (en) 2004-09-23

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