EP1048605A1 - Multiple function crane with telescope jib - Google Patents

Abstract

Jib (7) comprises successive jib elements : jib foot (14), jib intermediate (15), and jib spike (16). Motorized mechanism, comprising jack (19) and link mechanism (20), links upper pylon (9) to jib foot for controlling rotation of jib foot relative to upper pylon. Jib intermediate comprises first short section (22), motorized using jack (25) and link mechanism (26); and second long sec (23), motorized using jack mechanism (28). Jib spike is motorized using jack (30) and link mechanism (31).

Description

The present invention relates to a lifting or handling, and more particularly a crane, which has multiple configurations and functions, particularly with regard to its arrow.

In the field of cranes, we know in particular the cranes tower whose preferred use is the construction of buildings of general parallelepiped shape.

The state of the art includes, in particular, cranes with foldable or telescoping mast tower, with boom retention system. A typical example is given by French patent No. 2,682,096 filed on 02.10.1991 in the name of the Applicant. For such cranes, it is known to make folding arrows in several successive elements, among others arrows with intermediate folding section - see by example French patent N ° 2 682 097 filed on 02.10.1991 in the name of the Applicant.

• grue à flèche horizontale distributrice,
• grue à flèche en " col de cygne " distributrice,
• grue à flèche inclinée distributrice, formant par exemple un angle de 30° à 45° par rapport à la verticale,
• grue relevable à volée de flèche.

For the commissioning of such a crane in a given place, it is necessary to predetermine the configuration of the crane before mounting, or dismantle the crane to change configuration, a choice must be made in particular between the following configurations:

• horizontal jib crane distributor,
• "swan neck" jib crane distributor,
• inclined distributor boom crane, for example forming an angle of 30 ° to 45 ° with respect to the vertical,
• lifting crane with boom boom.

The working dimensions of the crane are determined by the chosen configuration, and does not allow to escape from aerial obstacles such as pre-existing buildings, power lines, bridges, other cranes neighbors ...

The overall dimensions of the crane during its assembly are determined, for a chosen configuration, by the kinematics of the crane, and cannot be changed.

Dimensions of the crane out of service, in particular of the crane "weather vane", can also be important and annoying.

We also know cranes that include a mast, mounted on a frame, and a distributing boom made up of two elements successive, articulated together around a horizontal axis, the first boom element being articulated by its rear part, around an axis horizontal, at the top of the mast, and this first boom element being suitable to be brought into a substantially vertical position, in line with the mast upright, so as to raise the mast. Such cranes are described in French patent application No. 2,260,525, as well as in the applications German Patent Nos. 26 23 299 and No. 26 06 799. In the case of the French patent application cited above, only the front boom element has a raceway, on which the carriage moves crane. In the case of the two German patent applications mentioned, both boom elements have a raceway so that the carriage can move along the entire length of the boom, when the two elements of it are aligned.

• Le nombre d'éléments de la flèche est limité à deux.
• Ces grues possèdent une cinématique à parallélogramme, éventuellement complétée par des câbles et haubans.
• De plus, ces grues possèdent des motorisations par un ou des câbles mouflés.

As will be appreciated, such cranes can be used in at least two positions. However, the number and variety of positions and uses are limited, for various reasons:

• The number of arrow elements is limited to two.
• These cranes have parallelogram kinematics, possibly supplemented by cables and shrouds.
• In addition, these cranes are powered by one or more cables.

Thus, the structure of these known cranes imposes a predetermined displacement of the boom elements, and a very limited use positions, with a small variety of positions, the front boom element being for example usable only in horizontal position.

In particular, such cranes are not designed to avoid obstacles, frequently encountered on construction sites, or for perform specific tasks, such as introducing a charge to the through an opening.

The present invention aims to avoid all these drawbacks, by providing a new design, easily adaptable and quickly on site conditions, even when congested, thanks to a modifiable configuration which truly allows obtaining a multiple positions and uses of the same machine.

To this end, the invention essentially relates to a crane with multi-function boom, the crane comprising a mast, mounted on a chassis, and a distributing boom composed of at least two elements successive, articulated together around horizontal axes, the first boom element being articulated by its rear part about an axis horizontal at the top of the mast, and all boom elements including a raceway for a carriage, at least the first element of boom being able to be brought into a substantially vertical position, in the alignment of the erected mast, so as to raise said mast, this crane being characterized by the fact that the distributing arrow consists of three successive arrow elements, i.e. an arrow foot, an element intermediate arrow and an arrowhead, hinged together around horizontal axes, and that the crane is designed to be used with the single boom foot brought into a substantially vertical position, aligned with the upright mast, or be used with the boom foot and the intermediate boom element both brought into position substantially vertical, aligned with the upright mast, the different articulations of the crane, in particular those of the boom, being motorized by cylinder devices, or by cylinder and connecting rod assembly.

Advantageously, the crane mast has at its top a support face, substantially horizontal and facing upwards when the mast is erected, provided to cooperate with a bearing face complementary located at the rear of the first boom element, or arrow. The cooperation of these two support faces ensures the transmission efforts, when the first boom element is aligned with the mast trained.

Thus, the invention is mainly characterized by the fact that a or two boom elements can be temporarily aligned with the mast, and thus be part of this mast of which they constitute an "extension", the other element (s) then forming a useful arrow more or less shortened.

In addition, the arrow element (s) that are not used as mast parts can, thanks to the multiple articulations provided, can be used in various configurations, in particular for training a horizontal distributor arrow, an inclined distributor arrow, a "swan neck" arrow or a lifting arrow. In the case of this last use, it is advantageous that the arrow has at least one element which pivots around a horizontal axis located at the top of the mast or at the upper end of an arrow element aligned with the erected mast, while the arrowhead is held substantially in position horizontal and retains a distributing function. The lifting boom can also be a distributor over its entire length, and at an angle of significant travel, all elements of this arrow (not used as part of mast) remaining aligned.

Thanks to its special features, the crane object of the invention allows adapt the load-span characteristic curves, plus particularly for the construction of shaped buildings parallelepiped. In addition, the invention makes it possible to adapt the configurations from the crane to congested sites, to use areas usually prohibited and gain access to areas that are impossible to access traditional lifting or handling equipment (mobile cranes, trolleys with telescopic lifting arms, construction cranes). Note that the working configurations of the crane, object of the invention, are all the more many and varied as the configurations of the boom elements, as mentioned above, can be combined with variable mast configurations, especially if the mast is foldable or telescopic and can therefore be used in several positions.

Furthermore, thanks to its structure and its positions of use multiple, the boom of the crane object of the invention can advantageously receive, at its front end, equipment, accessories or apparatus, for example a boom extension, a nacelle or a fork, carried by a support itself mounted pivoting about an axis horizontal at this end of the arrow, which further multiplies the possibilities of using the crane.

It will also be noted that the different articulations of the crane, in particular those of the boom, being motorized by actuator devices, or cylinder and connecting rod, allow to pass easily and quickly from one configuration to another, for example to bring an element of arrow in the alignment of the mast or, conversely, to bring this element in a position where it belongs to the useful part of the arrow. The multiplication of the arrow elements, three in number, combined with the independence thus obtained for the articulations between these elements, that no kinematics are imposed beforehand, and that the crane can truly be brought in many configurations and various.

Figure 1 est une vue de côté d'une grue conforme à la présente invention, en position entièrement repliée de transport ;

Figure 2 est une vue de côté de la grue de figure 1, utilisée comme grue à flèche relevable, le mât restant replié ;

Figure 3 illustre diverses positions d'utilisation, correspondant à la configuration de la figure 2 ;

Figure 4 illustre d'autres positions d'utilisation avec une béquille, avec mât partiellement déplié ;

Figure 5 est une vue de côté de la même grue, illustrant diverses positions d'utilisation avec mât déplié ;

Figure 6 est une vue similaire à figure 5, illustrant d'autres positions d'utilisation, avec un élément de flèche aligné avec le mât ;

Figure 7 est une vue similaire aux précédentes, illustrant une utilisation avec flèche en "col de cygne" et relevable et/ou distributrice ;

Figure 8 est une vue similaire aux précédentes, illustrant encore une autre position avec deux éléments de flèche alignés avec le mât ;

Figure 9 illustre, sur la même vue de côté, diverses positions de la grue utilisée comme support d'une nacelle.

The invention will be better understood with the aid of the description which follows, with reference to the appended diagrammatic drawing representing, by way of example, an embodiment of this crane with multiple-function boom, and illustrating the multiple possibilities of use of such a crane:

Figure 1 is a side view of a crane according to the present invention, in the fully folded transport position;

Figure 2 is a side view of the crane of Figure 1, used as a lifting jib crane, the mast remaining folded;

Figure 3 illustrates various positions of use, corresponding to the configuration of Figure 2;

Figure 4 illustrates other positions of use with a stand, with partially unfolded mast;

Figure 5 is a side view of the same crane, illustrating various positions of use with the mast unfolded;

Figure 6 is a view similar to Figure 5, illustrating other positions of use, with an arrow element aligned with the mast;

Figure 7 is a view similar to the preceding, illustrating a use with arrow "swan neck" and liftable and / or dispenser;

Figure 8 is a view similar to the previous ones, illustrating yet another position with two boom elements aligned with the mast;

Figure 9 illustrates, on the same side view, various positions of the crane used to support a nacelle.

The crane shown in the drawing has a basic chassis 1, mounted on wheels 2 and provided with stabilizers 3. On the base frame 1 is mounted a rotating chassis 4, orientable around a vertical axis 5. On the rotating frame 4 is mounted a folding mast 6, which itself carries a distributor arrow 7.

The folding mast 6 is composed of two mast elements, namely a lower mast element 8 and an upper mast element 9, each of polygonal section and box structure (as shown) or trellis. The lower mast element 8 is articulated by its base, around a horizontal axis 10, on the rotating chassis 4. The upper mast element 9 is articulated by its base, around a horizontal axis 11, at the top of the lower mast element 8, this articulation allowing pivoting relative on an angle of 180 °.

The folding mast 6 is maintained by a double guy 12, the assembly being motorized by a cylinder device and connecting rod assembly not shown, which controls the unfolding and folding of the mast 6. In position fully folded (see Figures 1 and 2), the two elements 8 and 9 of the mast 6 are arranged horizontally, superimposed, on the rotating chassis 4. In this folded position, the upper part of the upper mast element 9 rests on a vertical support with lateral guide 41, provided at the rear of the rotating chassis 4. In the fully unfolded position (see figures 3 and following), the two elements 8 and 9 of the mast 6 are aligned, and straightened substantially vertically, a slight angle a may exist between the mast 6 upright and the vertical axis 5.

The upper mast element 9 has, at its top, a end face 13 which, as described below, serves as a bearing face for the rear part of the boom foot.

The distributing arrow 7 is composed of three elements of successive jibs 14, 15 and 16, each of box structure or trellises, all of which have, at their underside, a raceway 17.

The first arrow element 14, also called the arrow foot, is articulated at its rear end, around a horizontal axis 18, at top of the upper mast element 9, this articulation allowing a relative pivoting at an angle of 180 °. A motorization device, with cylinder 19 and connecting rod 20, connects the upper mast element 9 to the foot jib 14, to control the pivoting of this jib foot 14 relative to the upper mast element 9. The jib foot 14 has, at its rear part, an end face 21 which serves as a face support, cooperating with the end face 13 of the mast element upper 9 when aligning the jib foot 14 with this element of upper mast 9.

The second arrow element 15, also called element boom intermediate, is itself composed of two sections 22 and 23.

The first short section 22, said rear section of folding, is articulated by its rear end, around a horizontal axis 24 located at raceway 17, on the front end of the jib foot 14. This articulation, allowing relative pivoting on an angle of 180 °, is motorized by a cylinder 25 and connecting rod device 26.

The second section 23 of greater length, called section front of the intermediate jib element 15 is articulated by its rear end, around an axis 27 located at the level of the bearing 17, on the front end of the first section 22. This articulation, allowing relative pivoting at an angle of 90 °, is motorized by a jack device 28.

The third and last arrow element 16, also designated as an arrowhead, is articulated by its rear end, around a horizontal axis 29 located at the level of the raceway 17, on the front end of the intermediate jib element 15 (therefore on the front end of the second section 23 of this element 15). This articulation, allowing relative pivoting over an angle of 180 °, is motorized by a cylinder 30 and connecting rod 31 device.

The distributing boom 7 has a boom carriage 32, mobile along the raceway 17, and motorized by a winch (not shown), preferably inside the jib foot 14. The passage of the cables for controlling the movement of the carriage 32, and of the lifting cable, is made at the various joints of the arrow 7 by cable guide pulleys (not shown), allowing operation of these cables in all the configurations of arrow 7.

In the embodiment illustrated in the drawing, the crane further includes a driver's cab 33, mounted on the chassis turning 4 by means of a connecting rod 34 forming a structure in deformable and motorized parallelogram by a jack not shown. The cabin 33 can thus be moved between a low position (Figures 1 to 4) and a high position (Figures 5 and following).

In the folded transport position, as shown in Figure 1, the arrow 7 is folded thanks to its various joints previously described, such that: the arrow foot 14 takes place horizontally above the mast 6 itself folded, the element boom intermediate 15 has its first section 22 (rear section of folding) arranged vertically and its second section 23 (front section) arranged horizontally above the jib foot 14, and the point of arrow 16 is oriented vertically or obliquely, downwards. The point boom 16 thus arranged is used for storing the carriage 32. The cabin 33, lowered, takes place on one side of the assembly formed by the mast 6 and the arrow 7 folded and lying horizontally.

From this fully folded position, the crane can be brought into a multiplicity of work positions, according to configurations given in arrow 7 which, themselves, can be combined with a folded, partially unfolded or unfolded configuration of the mast 6. Thus, Figures 2 to 3 illustrate a use of this crane with its mast 6 kept completely folded back (as in position transport), figure 4 shows a use with mast 6 partially unfolded, and Figures 5 to 8 illustrate other uses with the mast 6 fully unfolded, and erect.

According to Figure 3, the crane is used with its mast 6 completely folded, therefore resting on the vertical support 41 provided at the rear of the rotating chassis 4, the arrow 7 being used as a lifting arrow and / or dispenser, with various configurations (specified below).

In a variant, illustrated in FIG. 4, the crane comprises a stand 42, articulated or telescopic, which is mounted between the support 41 of its rotating chassis 4 and an element 9 of the mast 6, more particularly the head of the mast 6. In its deployed position, the stand 42 allows the work of the crane with the mast 6 partially unfolded. More specifically, the figure 4 shows various uses of the crane with the crutch 42 fully deployed, and it also briefly indicates a possibility of use with the stand 42 partially deployed, the element mast 9 then being closer to the horizontal. Of course, a variant with multi-position stand, allowing multiple intermediate inclined positions of the mast element 9, is also conceivable. The stand 42 can be articulated at its upper end or lower, and be motorized by a jack, or not motorized.

More specifically, Figure 4 shows use with lifting and distributing jib 7 on its front part (jib tip 16), and in variant indicated in phantom, with arrow 7 in "swan neck" distributor. Corresponding uses, but without a stand, are illustrated in figure 3.

According to another particularity, one or two elements of the arrow 7, namely the single jib foot 14 or the jib foot 14 and the element boom intermediate 15, can be aligned with mast 6 unfolded partially or completely unfolded, and thus raise this mast 6 with, for consequently, a shortening of the useful part of the arrow 7.

In particular, the crane can be used as a crane with distributor arrow 7, substantially horizontal, according to the various configurations described below:

The crane is used with a "long" distributor boom 7, the three elements 14, 15 and 16 of which are substantially aligned horizontally - see the position indicated "A" in figure 5; the respective raceways 17 of the three boom elements 14, 15 and 16 then come in line with each other, to form a straight and continuous raceway along which the carriage circulates 32.

The crane is used with a "medium" distributor boom 7, the first jib element 14 being aligned with the mast 6 unfolded and erected that it extends upwards, and its second and third elements 15 and 16 being aligned substantially horizontally - see the position indicated "B" in figure 6.

The crane is used with a 7 "short" distributing jib, its first and second elements 14 and 15 being aligned with the mast 6 unfolded and erect that they extend upwards, and only the third element 16, or arrowhead, being held in position substantially horizontal - see the position illustrated in figure 8.

The crane is used with its boom 7 partially folded, the first boom member 14 being substantially horizontal, the first section or folding section 22 of the intermediate element 15 being oriented upwards, and the second section or front section 23 of this intermediate element 15, as well as the arrowhead 16 located aligned, folded 180 ° above the first jib element 14 - see the position indicated "C" in figure 5.

Starting from the previously described configurations, the same crane can also be used with a lifting boom 7 distributor 7, forming an angle notably between 0 ° and 45 °, or even more, by compared to the horizontal. This possibility can be combined with the various usable boom lengths, the resulting configurations being easily imaginable.

Another type of use is designated as a "col" arrow swan ". In this type of use, the arrow foot 14 forms an angle intermediate, between 0 ° and 90 °, relative to the horizontal, therefore also relative to the mast 6. The remaining part of the arrow 7, so the second and third arrow elements 15 and 16 are maintained substantially horizontal (unless more or less inclined). Such a swan neck arrow configuration is indicated by position "D" in Figure 5, as well as in Figure 7 (see below).

The crane can still be used as a jib crane liftable.

In this type of use, the carriage 32 is held on the arrowhead 16, which optionally can be held in position horizontal and maintain a distributing function. According to one possibility, the first and second arrow elements 14 and 15 are aligned, and pivot around the horizontal axis 18, located at the top of the mast 6 - see the position indicated "E" in Figure 5. Alternatively, the first jib element 14 is aligned with the raised mast 6, and only the second jib element 15, with its two sections 22 and 23 aligned, pivots around the horizontal axis 24 at the top of the mast raised here by the arrow element 14 -see the position indicated "F" in FIG. 6. The FIG. 2 illustrates yet another use in a lifting jib crane, in which the aligned arrow elements 14 and 15 pivot around the horizontal axis 18 kept in the low position, since the mast 6 remains here folded up. The support point 41 is here used to allow the work of the crane with mast 6 in the horizontal lying position.

Still using the lifting boom crane, depending on another option, elements 14, 15, 16 of arrow 7 (which are not used as mast part) are aligned, so that arrow 7 is distributor over the entire length of these elements. This is illustrated on the FIG. 5, position "E1", for a liftable distributor boom 7 over all the length of its three elements 14, 15, 16 aligned, and in FIG. 6, "F1" position, for a lifting 7 distributing boom on both front elements 15 and 16 aligned.

This last option can be combined with a "collar swan ", the first arrow element 14 being kept inclined, as illustrated in figure 7.

In all cases of the distributing lifting boom, the arrow 7 (or the lifting part of this arrow 7) has, between its low position and its position raised to the maximum, a deflection angle β which can be of the order of 45 ° under load (this angle may be greater, in use of the crane at low load, or empty).

• passage d'une flèche 7 distributrice (déchargement d'un camion) à une flèche 7 relevable pour la distribution d'une charge sur le sommet d'un bâtiment.
• évitement d'un bâtiment 35 par passage en position avec flèche 7 et mât 6 alignés, avant retour en configuration de flèche 7 distributrice pour la distribution de la charge 36 sur une autre partie du chantier (voir figure 8).
• manutention d'une charge au travers d'une ouverture, par combinaison d'un relevage du mât 6 avec la variation du " col de cygne " de la flèche 7.

The various configurations described above can be combined, during a working cycle of the crane, for example according to the following sequences:

• passage from a distributing boom 7 (unloading from a truck) to a lifting boom 7 for distributing a load on the top of a building.
• avoidance of a building 35 by passing into position with arrow 7 and mast 6 aligned, before returning to configuration of distributor arrow 7 for the distribution of load 36 on another part of the site (see FIG. 8).
• handling of a load through an opening, by combination of lifting the mast 6 with the variation of the "swan neck" of the arrow 7.

The arrowhead 16 can be replaced, in its function boom end, by a simple cross member serving to support cable return pulleys controlling the movement of the carriage 32, and fixed point for the lifting cable, said cross member being fixed on the front section 23 of the “intermediate” jib element 15. In position for transporting the crane, the carriage 32 is then placed on one of the sections 22 or 23 of the "intermediate" element 15.

In the case of the removal of arrowhead 16, the “intermediate” element of arrow 15 can receive in replacement, at its front end, as shown in FIG. 9, an articulated support 37 around a horizontal axis 38 and receiving a nacelle 39. The articulation of the support 37 on the jib element 15 allows relative pivoting on 180 °, and this articulation is motorized by a device (not shown) with cylinder and connecting rod assembly. In this application, the nacelle 39 can be brought into a multiplicity of work positions, such as those indicated in "G", "H", "I" and "J", using the various joints of the crane, and in particular the possibilities already explained higher to align an arrow element 14, or two arrow elements 14 and 15, with mast 6 itself unfolded and erected (in the examples illustrated). In particular, in the position indicated in "G", the nacelle 39 can be brought into an area separated from the base frame 1 by a wall 40 or other obstacle higher or lower. Mast 6 could be in a folded or partially folded configuration.

In variants not shown, the support 37 can receive other equipment, accessories or devices, such as a boom extension or fork, or a special tool, for example a bucket, allowing lifting, handling, earthmoving or other.

• en réalisant le mât en un seul tronçon de longueur fixe, ou en un ou plusieurs tronçons télescopiques ;
• en réalisant le mât et les éléments de flèche sous la forme de structures de forme et section quelconques, par exemple en réalisant le pied de flèche comme une structure de section triangulaire ;
• en modifiant le nombre et la répartition des éléments ou tronçons de flèche, par exemple en réalisant tout l'élément intermédiaire de flèche comme un tronçon rigide unique ;
• en remplaçant les moyens de motorisation, associés aux diverses articulations, par tous équivalents des dispositions précédemment indiquées ;
• en montant la même structure de grue sur un châssis de base, ou autre élément porteur, de tout type et de toute forme, roulant ou non ;
• en prévoyant, sur cette grue, tout agencement de cabine ou poste de conduite différent de l'exemple particulier représenté ;
• en rajoutant des tirants et des poinçons permettant de rigidifier la structure.

One would not depart from the scope of the invention, as defined in the claims:

• by making the mast in a single section of fixed length, or in one or more telescopic sections;
• by making the mast and the jib elements in the form of structures of any shape and section, for example by making the jib base as a structure of triangular section;
• by modifying the number and distribution of the boom elements or sections, for example by making the entire intermediate boom element as a single rigid section;
• by replacing the motorization means, associated with the various articulations, by all equivalent of the provisions previously indicated;
• by mounting the same crane structure on a basic chassis, or other load-bearing element, of any type and shape, whether rolling or not;
• by providing, on this crane, any arrangement of cabin or driving position different from the particular example shown;
• by adding tie rods and punches to stiffen the structure.

Claims (10)

Crane with multifunction jib, the crane comprising a mast (6), mounted on a chassis (1, 4), and a distributing jib (7) composed of at least two successive elements (14, 15, 16), articulated between them around horizontal axes (24, 29), the first boom element (14) being articulated by its rear part around a horizontal axis (18) at the top of the mast (6), and all the boom elements (14, 15, 16) comprising a raceway (17) for a carriage (32), at least the first boom element (14) being able to be brought into a substantially vertical position, in alignment with the mast (6 ) erected, so as to raise said mast (6), characterized in that the distributing boom (7) consists of three successive boom elements, either a boom foot (14), an intermediate boom element (15) and an arrowhead (16), hinged together around horizontal axes (24, 29), and in that the crane is designed to be able to ir be used with the single jib foot (14) brought into a substantially vertical position, aligned with the raised mast (6), or else be used with the jib foot (14) and the intermediate jib element (15) both in a substantially vertical position, aligned with the mast (6) erected, the various articulations of the crane, in particular those of the boom (7), being motorized by actuator (28), or actuator (19, 25 , 30) and connecting rod assembly (20, 26, 31). Crane with multi-function boom depending on the claim 1, characterized in that the intermediate boom element (15) is composed of two sections (22, 23), namely a rear section short folding (22) and a larger front section (23) length, allowing the use of the partially folded boom (7), the front section (23) of the intermediate boom element (15) being aligned with the arrowhead (16) and folded 180 ° above the arrowhead (14) substantially horizontal (position "C"). Crane with multi-function boom depending on the claim 1 or 2, characterized in that the mast (6) has at its top a substantially horizontal bearing face (13) facing towards the high when the mast (6) is erected, provided to cooperate with a face complementary support (21) located behind the first element boom, or boom foot (14), when this boom element (14) is aligned with the upright mast (6). Crane with multi-function boom according to one any one of claims 1 to 3, characterized in that the one or more elements (14, 15, 16) of the arrow (7) which are not used as mast parts can be used to form a horizontal boom (7) distributor (positions "A" and "B"), a lifting distributor boom, a swan neck arrow (positions "D" and "F"), or a lifting arrow (position "E"). Crane with multi-function boom depending on the claim 4, characterized in that, in the boom use liftable, the boom (7) has at least one element (14, 15) which pivots around a horizontal axis (18, 24) located at the top of the mast (6) or the upper end of a jib element (14) aligned with the mast (6) upright, while the arrowhead (16) is held in position substantially horizontal and retains a distributing function. Crane with multi-function boom depending on the claim 4, characterized in that, in the boom use lifting, the arrow (7) is used as a distributing arrow on the whole length of its elements (14, 15, 16), aligned, which are not used as part of the mast. Crane with multi-function boom according to one any one of claims 1 to 6, characterized in that it has a foldable or telescopic mast (6), usable in several positions, boom element configurations (14, 15, 16) being thus combinable with variable mast configurations (6). Crane with multi-function boom depending on the claim 7, characterized in that its rotating chassis (4) comprises, at the rear, a vertical support with lateral guide (41), on which is able to rest part of the mast (6) in the folded position, to allow work of the crane with mast (6) in the supine position. Crane with multi-function boom depending on the claim 8, characterized in that it comprises a stand (42), articulated or telescopic, mounted between the support (41) of its chassis rotating (4) and an element (9) of the mast (6), and allowing, in its position deployed, the work of the crane with the mast (6) partially unfolded. Crane with multi-function boom according to one any one of claims 1 to 9, characterized in that the arrow (7) is designed to receive equipment at its front end, accessory or apparatus, such as a boom extension, a nacelle (39) or a fork, carried by a support (37) itself mounted pivoting around a horizontal axis (38) at this end of the arrow (7).

Images