Construction crane that is portable and movable when loaded

Abstract

The invention relates to a construction crane (1) that is portable and movable when loaded, referred to as the crane (1), comprising a chassis (2, 3) on which four wheels (230, 240, 330, 340) are mounted, at least two of which are pivotable, a mast (4) whose base is pivotably mounted on the chassis, the mast being pivotable, in a median longitudinal plane of the crane, about a transverse axis, a boom (6) attached to the head of the mast, the boom being pivotable, relative to the head of the mast, about a transverse axis, and slidable, on the head of the mast along a sliding axis included in the median longitudinal plane of the crane, and which can be adjusted by pivoting the boom. The boom is suitable for receiving a gripping means (7) for gripping a load to be moved (16), or force transmission means (8) intended to support, at least in part, a load to be moved and / or a lifting means (9) for lifting the load to be moved. The crane comprises an actuator (10) arranged to pivot the mast so as to support a distal end of the boom in a cantilevered manner with respect to the chassis, a base of the actuator being pivotably mounted on the chassis so as to pivot about a transverse axis distinct from the transverse axis about which the mast is pivotable, a head of the actuator being pivotably mounted so as to pivot about a transverse axis on an upper quarter of the mast located on the same side of the mast as the head, the actuator being pivotable, relative to the mast and the chassis, in the median longitudinal plane of the crane.

Description

DESCRIPTION Portable and mobile construction crane under load technical field

[0001] The present invention relates to the field of construction cranes.

[0002] The invention relates, in particular, to mobile construction cranes, that is to say, cranes capable of moving, in particular by rolling, while carrying a load.

[0003] The invention relates, in particular, to portable construction cranes, that is to say, suitable and intended to be transported to a site of use or construction site. State of the art

[0004] Construction cranes are tools used to lift loads upwards from the ground.

[0005] We are familiar with mobile construction cranes, such as mini crawler cranes, which are capable of moving. However, not all construction cranes are mobile under load, meaning they are not capable of moving while carrying a load.

[0006] Among mobile construction cranes under load, motorized, controlled-travel construction cranes are now widespread. Few of these cranes offer free movement, particularly laterally. Furthermore, changes of direction, especially when stationary, are difficult, if not impossible, for most state-of-the-art cranes, and in most cases result in swaying.

[0007] State-of-the-art construction cranes have the disadvantage of not being portable but only transportable using dedicated means of transport, such as dump trucks, flatbeds, trailers, or semi-trailers. Furthermore, on certain sites, particularly mountainous, remote, or inaccessible locations for large transport vehicles, it is necessary to transport the construction crane from the means of transport on which it was loaded to the actual work site. Therefore, the distance between the crane's transport and its point of use can be significant, and the access route to the work site may be rugged or difficult (sloping, uneven, or terraced terrain, including stairs or obstacles).

[0008] In addition, their mobility is often reduced due to weight, particularly the presence of an on-board engine, and / or the bulk of the crane, due to the wheelbase and / or the spacing of the wheels or tracks.

[0009] Furthermore, the operating area of ​​state-of-the-art cranes is mostly limited to ground-level areas. They generally cannot be used on upper floors of an enclosed building unless those floors are equipped with a freight elevator. Moreover, they can only be deployed on open / accessible floors of a building with the aid of an additional crane, or other lifting equipment, already present on site, to raise them to those floors.

[0010] One aim of the invention is to provide a construction crane: - suitable for indoor use, and / or - suitable for outdoor use, and / or - versatile, and / or - allowing the elimination of wobbling when the load is placed or when the load is positioned against or on the placement surface, and / or - manipulates with a single operator or, at a minimum, with a limited number of operators, and / or - low manufacturing cost, particularly one that is affordable for sole proprietorships and very small businesses, and / or - usable in a habitable room, and / or - usable on upper floors, and / or - usable in a room without access to the outside, and / or - fully removable, preferably without tools and / or manually, and / or - offering a significant range of motion, and / or - mobile under load, that is to say capable of moving while carrying a load, and / or - rotating and / or allowing the load to rotate, and / or - enabling the lifting and transport of loads at height, and / or - portable and / or able to be transported in any means of transport without the intervention of a trailer or dedicated means of transport for loading the crane. Description of the invention

[0011] For this purpose, a portable and mobile construction crane under load, called a crane, is proposed.

[0012] The crane includes a chassis. Four wheels are mounted on the chassis. Preferably, at least two of the four wheels are swivel casters.

[0013] The crane includes a mast. The base of the mast is pivotally mounted on the chassis. The mast is pivotable, in a longitudinal median plane of the crane, around a transverse axis.

[0014] The crane includes a jib. The jib is fixed to the masthead. The jib is pivotable relative to the masthead. The jib is pivotable about a transverse axis. The jib is sliding along the masthead along a sliding axis. The sliding axis lies in the longitudinal plane. central part of the crane. The sliding axis can be adjusted by pivoting the boom.

[0015] The arrow is suitable for or arranged to receive or includes: - a means of gripping a load to be moved, or - one or more means of transmitting force intended to support, at least in part, a load to be moved and / or a means of lifting said load to be moved.

[0016] The crane includes a jack. The jack is arranged to pivot the mast so as to carry a distal end of the boom cantilevered from the chassis. The base of the jack is mounted pivotally about a transverse axis distinct from the transverse axis about which the mast pivots, on the chassis. The head of the jack is mounted pivotally about a transverse axis on the upper quarter of the mast located on the masthead side. The jack pivots, relative to the mast and chassis, in the median longitudinal plane of the crane.

[0017] Preferably, in this application, it is understood by "pivotable": pivoting, able to pivot or arranged to pivot.

[0018] Preferably, in this application, it is understood by "sliding": sliding, able to slide or designed to slide.

[0019] Preferably, in this application, the median longitudinal plane is understood to mean: a plane located equidistant from each lateral side of the chassis. Preferably, the median longitudinal plane extends vertically.

[0020] Preferably, in the present application, "mounted" is understood to mean coupled, fixed (preferably in a mobile manner), assembled, hung or linked, preferably reversibly.

[0021] Preferably, the chassis includes all four wheels.

[0022] Preferably, the wheels are mounted or connected to the four corners or angles of the chassis.

[0023] Preferably, the gripping means is mounted on a distal end of the arrow.

[0024] One of the force transmission means can be mounted on a distal end of the boom.

[0025] The lifting means can be mounted on a distal end of the boom or can be mounted on the boom.

[0026] Preferably, the chassis includes a main axle and an auxiliary axle.

[0027] Preferably, the main bridge comprises two stringers, each extending along a longitudinal axis distinct from the crane.

[0028] Preferably, the main bridge includes a cross member. Preferably, the cross member of the main bridge extends along a transverse axis of the crane. Preferably, the cross member of the main bridge forms a front or rear end of the chassis.

[0029] Preferably, the main axle comprises two half-axles. Preferably, each half-axle of the main axle comprises a wheel that can be pivoting or fixed (and / or non-pivoting). Preferably, the two half-axles of the main axle are mounted to slide opposite each other in the cross member of the main axle.

[0030] Preferably, the auxiliary bridge comprises two longitudinal beams, each extending along a longitudinal axis distinct from the crane.

[0031] Preferably, the auxiliary bridge includes a cross member. Preferably, the cross member of the auxiliary bridge extends along a transverse axis of the crane. Preferably, the cross member of the auxiliary bridge forms a front or rear end of the chassis.

[0032] Preferably, the auxiliary bridge comprises two half-axles. Preferably, each half-axle of the auxiliary bridge comprises a swivel wheel. Preferably, the two half-axles of the auxiliary bridge are mounted to slide opposite each other within the transverse upright of the auxiliary bridge.

[0033] Preferably, each spar of the auxiliary deck is mounted in a respective spar of the main deck.

[0034] Preferably, the base of the mast is mounted pivotally, around a transverse axis extending between the two stringers of the main deck, on said main deck.

[0035] Preferably, the base of the cylinder is mounted pivotally, around a transverse axis, on the main bridge.

[0036] Preferably, the mast is non-extendable and / or of fixed dimensions (particularly in length) and / or is a single piece.

[0037] Preferably, it is understood by "sliding": pivoting, able to slide or arranged to slide.

[0038] Preferably, the main bridge's transverse upright extends along a transverse axis distinct from the transverse axis along which the auxiliary bridge's transverse upright extends.

[0039] Preferably, the two half-axles of the main bridge and the two half-axles of the auxiliary bridge are sliding in the cross member of the main bridge and respectively in the cross member of the auxiliary bridge.

[0040] Preferably, the median longitudinal plane is understood to be the plane equidistant from the two stringers of the main deck and the two stringers of the auxiliary deck. Preferably, the median longitudinal plane extends vertically.

[0041] Preferably, the jack is arranged to pivot the mast so as to carry a distal end of said boom cantilevered from the main deck upright or from the auxiliary deck upright.

[0042] Preferably, the arrangement of the mast, jack and / or chassis, or the arrangement of the mast, jack and / or chassis relative to each other, allows the distal end of the boom to be cantilevered from the chassis, preferably also from the main deck upright or from the auxiliary deck upright.

[0043] Preferably, the distal end of the boom is intended or suitable or arranged to be cantilevered from the chassis, preferably also from the main bridge or from the auxiliary bridge.

[0044] It can be understood as referring to the front end of the chassis: - the end of the chassis (intended to be) located and / or positioned opposite the load to be moved and / or - the end of the chassis relative to which the distal end of the boom is intended to be, or is placed, in cantilever.

[0045] Preferably, the rear end of the chassis is defined relative to and / or in relation to and / or in opposition to the front end.

[0046] Preferably, the two half-axles of the main axle are mounted, preferably sliding, opposite each other in the main axle's cross member to adjust, preferably by sliding, the position of the wheels of the main axle half-axles relative to the chassis at various distances. Preferably, the two half-axles of the auxiliary axle are mounted, preferably sliding, opposite each other in the auxiliary axle's cross member to adjust, preferably by sliding, the position of the swiveling wheels of the auxiliary axle half-axles relative to the chassis at various distances.

[0047] Preferably, each side member of the auxiliary bridge is mounted, preferably sliding, in a respective side member of the main bridge to adjust, preferably by sliding a side member of the auxiliary bridge in a respective side member of the main bridge, a spacing between the transverse upright of the main bridge and the transverse upright of the auxiliary bridge, preferably between several spacings between the two half-axles of the main bridge and the two half-axles of the auxiliary bridge.

[0048] Preferably, the main deck comprises two or more crossbeams. Preferably, the two crossbeams are mounted, and preferably extend, between the two spars of the main deck. Preferably, one of the crossbeams is located, and preferably mounted, on a quarter, called the proximal quarter, of the main deck on the side opposite the distal end of the boom. Preferably, another of the crossbeams is located, and preferably mounted, on a quarter, called the distal quarter, of the main deck on the side of the distal end of the boom.

[0049] Preferably, the two crossbeams are mounted fixed between the two longitudinal members of the main bridge.

[0050] Preferably, the two crossbeams are mounted between an inner slice of one of the main deck spars and an inner slice of the other main deck spar.

[0051] Preferably, the base of the cylinder is mounted pivotally on the cross member located on the proximal quarter of the main bridge.

[0052] Preferably, according to a first operating mode of the crane, the main deck and the auxiliary deck are arranged and / or assembled and / or mounted together and / or the boom is mounted on the mast so that the distal end of said boom can be carried or cantilevered from the transverse post of the main deck.

[0053] Preferably, according to the first operating mode of the crane, the transverse post of the main bridge, relative to which the distal end of the boom is intended to be cantilevered, is mounted pivotally, relative to a longitudinal axis, on the chassis.

[0054] Preferably, the transverse upright of the main bridge is pivotable in a transverse plane of the crane.

[0055] Preferably, the transverse upright of the main bridge is mounted pivotally, relative to a median longitudinal axis, preferably to a median longitudinal axis of the chassis, on the main bridge.

[0056] Preferably, in this application, the median longitudinal axis is understood to mean: an axis located equidistant from each lateral side of the chassis, preferably an axis included in a plane of the chassis, preferably an axis included in a horizontal plane, preferably an axis included in the median longitudinal plane of the crane.

[0057] Preferably, according to a second mode of operation, the main deck and the auxiliary deck are arranged and / or assembled and / or mounted together and / or the boom is mounted on the mast so that the distal end of the boom can be carried or cantilevered from the cross member of the auxiliary deck.

[0058] Preferably, the crane includes locations arranged to receive counterweights in a removable manner. Preferably, the locations are positioned, rest, or are partially supported on the transverse upright of the auxiliary bridge.

[0059] Preferably, the berths are contained within at least one pier. Preferably, the transverse upright of the auxiliary deck and / or the stringers of the auxiliary deck and / or the stringers of the main deck include coupling means arranged to immobilize, in a removable manner, at least one pier.

[0060] Preferably, the crane includes a pivoting sleeve. Preferably, the pivoting sleeve is pivotally mounted on the mast head. Preferably, the boom is mounted, preferably sliding, within the pivoting sleeve. Preferably, the pivoting sleeve is arranged to allow the boom to slide and pivot, preferably relative to the mast.

[0061] Preferably, the pivot sleeve is mounted pivotally, around a transverse axis, on the masthead.

[0062] Preferably, the pivot sleeve is arranged to allow the boom to slide along a sliding axis located in the longitudinal median plane of the crane. Preferably, the sliding axis is adjustable by pivoting the pivot sleeve.

[0063] Preferably, the crane includes a means of limiting the pivot angle of the mast between 25° beyond the vertical on the side of the jack, and / or the side opposite the distal end of the boom, and / or 40° beyond the vertical on the side opposite the jack, and / or the side of the distal end of the boom.

[0064] Preferably, the means for limiting the mast's pivot angle is arranged to limit: - an angle formed between the mast, pivoted on the side of the jack and / or the side opposite the distal end of the boom, and the vertical with a value less than or equal to 25°, preferably less than or equal to 20° and preferably even less than or equal to 15°, and / or - an angle formed between the mast, pivoted on the opposite side of the jack and / or on the side of the distal end of the boom, and the vertical with a value less than or equal to 40°, preferably with a value less than or equal to 35° and preferably again with a value less than or equal to 30°.

[0065] Preferably, the mast includes a means for attaching the lifting system. Preferably, the means for attaching the lifting system, which is located, mounted, or fixed in the upper half of the mast on the masthead side, preferably to a cross-section of the mast. Preferably, the lifting means cooperates with the force transmission means.

[0066] Preferably, the crane includes a stabilizer arranged to support and / or stabilize the crane. Preferably, the stabilizer further includes at least three retractable and rotating legs, about a vertical axis and / or relative to a vertical axis of rotation, relative to the chassis.

[0067] Preferably, the stabilizer is mounted on the chassis, preferably still under the chassis.

[0068] Preferably, at least three legs are rotatable and / or arranged to be positioned relative to a vertical axis, preferably the vertical axis being perpendicular to the longitudinal and transverse axes of the crane, preferably the vertical axis is included in the median longitudinal plane of the crane.

[0069] Preferably, it can be understood as "transverse plane of the chassis": a plane perpendicular to the longitudinal planes of the crane. Preferably, it can be understood as "transverse plane of the chassis": a plane extending vertically.

[0070] Preferably, the stabilizer includes a pivoting plate base mounted under the chassis, preferably mounted under the main bridge.

[0071] Preferably, the base comprises a fixedly mounted plate under the chassis and a rotating plate, preferably relative to the fixed plate. Preferably, at least three of the legs are rotatable and / or rotated by rotation of the rotating plate.

[0072] Preferably, at least three legs are mounted retractably on the rotating plate.

[0073] Preferably, the at least three legs include, at their distal end, a pad intended to be brought into contact with the ground.

[0074] Preferably, the crane includes a lifting support mounted on the chassis. Preferably, the lifting support includes a pivot arranged to partially relieve and / or support the load carried by the crane and / or the weight of the crane, so as to allow the crane to rotate around the pivot under load. Brief description of the FIGURES

[0075] The invention will be better understood upon reading the following description, given solely by way of non-limiting example and made with reference to the accompanying drawings in which: - FIGURE 1 is a schematic representation, in a slanted top view, of one embodiment of the construction crane, - FIGURE 2 is a schematic side view representation of the construction crane without some of these elements, - FIGURE 3 is a schematic representation, in a slanted top view, of one embodiment of the construction crane, - FIGURE 4 is a schematic side view representation of the construction crane, - FIGURE 5 is a schematic representation, in a slanted top view, of an improvement to the construction crane, - FIGURE 6 is a schematic side view representation of the improvement illustrated in FIGURE 5 of the construction crane, lacking some of these elements. - FIGURE 7 is a schematic side view representation of a variant of the construction crane, lacking some of these elements, illustrated in FIGURES 1 to 4, - FIGURE 8 is a schematic side view representation of the variant of the construction crane illustrated in FIGURE 7.

[0076] It is understood that the embodiments described below are by no means exhaustive. In particular, variants of the invention may be conceived comprising only a selection of the features described below, isolated from the other features described, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the prior art. This selection includes at least one preferably functional feature without structural details, or with only a portion of the structural details if this portion alone is sufficient to confer a technical advantage or to differentiate the invention from the prior art.

[0077] In particular, all the variants and embodiments described can be combined with each other if there are no technical obstacles to this combination. Detailed description of the FIGURES

[0078] With reference to FIGURES 1 to 7, a non-limiting embodiment of the portable and mobile construction crane under load 1, referred to as crane 1, according to the invention, is illustrated.

[0079] According to the non-limiting embodiment presented, Crane 1 is completely demountable. Crane 1 is composed of a set of individual parts that can be assembled to form Crane 1 and disassembled by a single person. Crane 1 can be assembled in approximately ten minutes at most by a single person and disassembled in approximately ten minutes at most by a single person, without the need for any tools.

[0080] Advantageously, each of the individual parts has a weight of less than 20 kg.

[0081] According to the non-limiting embodiment, the individual parts are advantageously, for the most part (with the exception of a portion of the wheels 230, 240, 330, 340 and certain portions of the pivot 50), made of steel. However, the individual parts could be made of any suitable material known to those skilled in the art.

[0082] Thus, each of the elements of the crane 1, which will be described in the continuation of the description of the embodiment, can comprise or be made up of a single individual part or of several individual parts reversibly assembled.

[0083] By way of non-limiting examples, the individual parts, and therefore the components of crane 1, are, at least in part (entirely for most components), made of S235 steel, S275 steel, or S355 steel, or of an alloy of elements other than iron, for example, aluminum alloy. A person skilled in the art will know and be able to select the type of material suitable for crane 1.

[0084] The individual parts are arranged and designed for industrial manufacturing. The individual parts (shape, layout, etc.) are adapted and designed to be produced by industrial processes (laser cutting, stamping...) and provided with means of assembly (holes, orifices, lugs...) being obtained by industrial processes.

[0085] With reference to FIGURES 1 to 8, the embodiment of crane 1 is illustrated. Crane 1 comprises a chassis 2, 3, a mast 4, a boom 6 and a jack 10.

[0086] The chassis 2, 3 comprises four wheels 230, 240, 330, 340. At least two wheels 230, 240, 330, 340 are pivotally mounted on the chassis 2, 3. Each of the at least two pivotable wheels 230, 240, 330, 340 is pivoted about a separate vertical axis. In addition, each wheel 230, 240, 330, 340 is equipped with an individually actuable brake to immobilize (prevent the rotation of) the wheel 230, 240, 330, 340 on which it acts.

[0087] According to the non-limiting embodiment presented, the four wheels 230, 240, 330, 340 are swiveling.

[0088] However, according to an alternative, only the two wheels 330 and 340 are swiveling, and the two wheels 230 and 240 are fixed (non-swiveling) and parallel to the median longitudinal plane. Advantageously, in this case, the two fixed wheels 230 and 240 have a larger diameter than the swiveling wheels 330 and 340.

[0089] According to the non-limiting embodiment, the at least two swiveling wheels 230, 240, 330, 340 can be immobilized, each independently, at a pivot angle. By way of non-limiting example, the at least two swiveling wheels 230, 240, 330, 340 can be immobilized at pivot angles of 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315°.

[0090] Thus, immobilizing at least two swiveling wheels 230, 240, 330, 340 (in particular wheels 230, 240 of the main bridge 2) in a 0° (or 180°) position improves the control and maneuverability of crane 1's movement (especially under load 16). When moving crane 1, wheels 330, 340 are left free to swivel.

[0091] Thus, the crane 1 is mobile in all directions. In particular, the crane 1 can be rotated around any axis of the crane 1, especially under load, by means of the wheels 230, 240, 330, 340, and in particular by means of the at least two swiveling wheels 230, 240, 330, 340. Thus, the load 16 carried by the crane 1 can be moved or set in motion in all directions, whether in rotation and / or translation.

[0092] The base of mast 4 is pivotally mounted on chassis 2, 3 so that mast 4 is able to pivot (at its base), around a transverse axis, in the median longitudinal plane of crane 1.

[0093] A transverse axis is understood to mean: an axis extending along the width of the chassis 2, 3 and / or the crane 1. A longitudinal axis is understood to mean: an axis extending along the length of the chassis 2, 3 and / or the crane 1. A transverse axis (any transverse axis) is perpendicular to a longitudinal axis (any transverse axis).

[0094] Longitudinal plane is understood to mean: a plane extending along the length of the chassis and / or extending vertically and / or perpendicular to any transverse axis.

[0095] The median longitudinal plane is understood to be: the longitudinal plane located equidistant from the two lateral edges of the chassis 2, 3.

[0096] The boom 6 is fixed to the top of the mast 4. The boom 6 is pivotable, relative to the top of the mast 4, around a transverse axis. Furthermore, the boom 6 can slide along the top of the mast 4 along a sliding axis contained within the median longitudinal plane of the crane 1. The sliding axis can be adjusted by pivoting the boom 6.

[0097] Arrow 6 is designed to receive: - a means of gripping 7 of a load to be moved 16, or - one or more means of transmitting force 8 intended to support, at least in part, a load to be moved 16 and / or a means of lifting 9 of the load to be moved 16.

[0098] The lifting means 9 can be any type of chain 17, cable 17, rope 17, or webbing 17 winder / unwinder known to those skilled in the art. It could be, for example, a winch 9, a hoist 9, or an equivalent device known to those skilled in the art. The lifting means 9 can be motorized or manual.

[0099] Advantageously, the boom 6 is arranged to pivot, relative to the top of the mast 4, in the median longitudinal plane. Preferably, according to the non-limiting embodiment presented, the boom 6 is arranged to pivot through an angle between 75° and 150° with respect to the mast 4.

[0100] According to a preferred, but not limiting, embodiment, the actuating elements of the crane 1, in particular the jack 10 and the lifting means 9, are not motorized. In this case, the elements are manually actuated. The user can use a manual tool or means of actuating, such as, for example, a screwdriver (in particular an electric one, advantageously a cordless drill, i.e., with a battery, and even more preferably a cordless power screwdriver). Thus, the crane 1 according to the invention has no motor and does not require or require any electrical cable or wire (which could hinder or disrupt the crane 1 during its movement, particularly under load).

[0101] According to the embodiment, the force transmission means 8 are pulleys 8, in particular pulleys (sometimes called sprockets 8 or hubs 8) suitable and / or adapted to the lifting means 9.

[0102] Cylinder 10 is arranged to pivot mast 4. Thus, mast 4 will be pivoted by actuating cylinder 10. The pivoting of mast 4 under the action of cylinder 10 has to modulate / control the overhang of the distal end of the arrow 6 relative to the chassis 2, 3.

[0103] Thus, the sliding of the boom 6 on the head of the mast 4 as well as the pivoting of the mast 4, by the action of the cylinder 10, make it possible to increase the overhang of the distal end of the boom 6 relative to the chassis 2, 3. Thus, the crane 1 offers a significant travel and overhang of the load 16.

[0104] Furthermore, the jack 10 allows the distal end of the boom 6 to be cantilevered from the frame 2, 3. From this position, a load 16 resting on the ground can be lifted. The load 16 can be moved while cantilevered. The jack 10 also allows the distal end of the boom 6 to be brought above or directly below the frame 2, 3. Thus, the load 16 can be positioned and / or brought above or directly below the frame 2, 3 before being moved, further facilitating and stabilizing movement and enabling movement in confined spaces. The base of the cylinder 10 is mounted pivotally, around a transverse axis, on the chassis 2, 3. The head of the cylinder 10 is mounted pivotally, around a transverse axis, on an upper quarter of the mast 4 located on the side of the head of the mast 4. In this way, the cylinder 10 is pivotable, relative to the mast 4 and the chassis 2, 3, in the median longitudinal plane of the crane 1.

[0105] According to the non-limiting embodiment, the jack 10 is not motorized. Thus, the weight of the crane 1 is reduced, which facilitates its transport and movement (particularly under load).

[0106] The transverse axis around which the base of the cylinder 10 pivots is distinct from the transverse axis around which the base of the mast 4 pivots. Therefore, a non-zero angle is formed between the cylinder 10 and the mast 4. This non-zero angle is variable. It changes as the mast 4 pivots under the action of the cylinder 10.

[0107] Put another way or analogously, the base of the cylinder 10 and the base of the mast 4 are mounted in two distinct positions on the chassis 2, 3. Thus, a non-zero angle is formed between the cylinder 10 and the mast 4.

[0108] Thus, the arrangement of the jack 10 and the mast 4, in particular the mounting of the base of the jack 10 and the base of the mast 4 directly onto the chassis 2, 3, lowers the center of gravity of the crane 1, thereby providing improved stability. This also allows the crane 1 to be moved under heavy loads. Furthermore, it improves stability by reducing the risk of the crane 1 tipping over, especially in the event of swaying.

[0109] Furthermore, the arrangement of the cylinder 10 and the mast 4, in particular the direct mounting of the base of the cylinder 10 and the base of the mast 4 onto the frame 2, 3, allows for a better distribution of stresses on the frame 2, 3, thus providing greater load resistance for the frame 2, 3. This also allows for the movement of significantly heavier loads 16 and the activation of the crane 1 under load.

[0110] Furthermore, the arrangement of the jack 10 and the mast 4, in particular the pivoting of the base of the jack 10 and the base of the mast 4 around two separate transverse axes, combined with the direct mounting of the base of the jack 10 and the base of the mast 4 onto the chassis 2, 3, allows the force and / or torque exerted by the load 16 on the crane 1 to be offset and distributed, further improving the stability of the crane 1. This also allows for the movement of significantly heavier loads 16 and the movement of the crane 1 under load. It also helps to limit the risk of the crane tipping over. 1, particularly in the case of swaying. Furthermore, all the aforementioned effects are obtained without limiting the deflection or the overhang provided by the boom 6.

[0111] Reducing the center of gravity of the crane 1, combined with the offset and distribution of the force and / or torque exerted by the load 16, allows for a considerable reduction in the longitudinal dimensions and the length of the chassis. 2, 3 and crane 1. It is therefore possible to use crane 1 in confined spaces, such as a house or a room.

[0112] The crane 1 according to the invention does not allow the mast 4 to pivot around the vertical and therefore does not allow the load 16 to move around the crane 1. Indeed, the pivoting of the mast 4 is limited to the median longitudinal plane only. However, the use of at least two swiveling wheels 230, 240, 330, 340, combined with the The increased stability provided by the crane 1 according to the invention (as described above) makes it possible to move the load 16 to the side of the crane 1 by rotating the crane 1 itself. Furthermore, the pivoting of the mast 4 only in the median longitudinal plane allows for a considerable reduction in the lateral dimensions and width of the chassis 2, 3, and the crane 1. It is therefore possible to use the crane 1 in confined spaces, such as a house, a room, or even a doorway.

[0113] Thus, the at least two swiveling wheels 230, 240, 330, 340, associated with individually operable brakes, allows the lateral movement of the crane 1, in particular by locking two wheels 230, 240, 330, 340, ideally two wheels 230, 240, 330, 340 located on the same lateral side of the chassis (2, 3), perpendicular to the chassis (2, 3).

[0114] Advantageously, the crane 1 includes a pivot sleeve 50, 51 mounted pivotably on the head of the mast 4. The boom 6 is mounted in the pivot sleeve 50, 51. The pivot sleeve 5 is arranged to slide and pivot the boom 6.

[0115] Advantageously, according to the non-limiting embodiment presented, the pivot sleeve 50, 51 is arranged to pivot the boom 6 by an angle between 75° and 150° with respect to the mast 4. According to the non-limiting embodiment presented, the pivot sleeve 50, 51 allows the mast to pivot in 15° increments.

[0116] The pivot sleeve 50, 51, according to the embodiment, comprises a sleeve portion 50 arranged to guide and constrain the sliding of the boom 6 about a sliding axis. The sleeve portion 50 is arranged to resist the stresses / torques exerted by the load 16 on the boom 6, in particular stresses with vertical components.

[0117] The sleeve portion 50 is suitable or arranged (or the inner portion of the sleeve 50 includes a suitable or arranged coating) to ensure the sliding and / or friction of the arrow 6 during sliding.

[0118] By way of non-limiting examples, the sleeve portion 50: comprises or is made of (or the inner portion of the sleeve 50 comprises or is made of a coating) thermoplastic material, for example in polyoxymethylene (POM), high-density polyethylene (HDPE) or tetrafluoropolyethylene (PTFE), or - includes thermoplastic plates, for example polyoxymethylene (POM), high-density polyethylene (HDPE) or tetrafluoropolyethylene (PTFE), preferably covering an inner portion of sleeve 50 and advantageously able to be arranged at both ends (proximal and distal) of sleeve 50.

[0119] The pivot sleeve 50, 51, according to the embodiment, comprises a pivot portion 51 arranged to pivot the pivot sleeve 50, 51 (and in particular the sleeve portion 50). The pivot portion 51 comprises two parallel plates arranged to be positioned on either side of the mast 4. Each plate comprises a set of pairs of holes, preferably extending along an arc of a circle. The two holes of each pair are aligned along a transverse axis. According to the non-limiting embodiment, a mechanical axis, preferably using a pin or key, can be used to immobilize the pivot portion 51, on or relative to the mast 4, along a given pivot axis.

[0120] Similarly, the boom 6 may include a set of pairs of holes formed in the two lateral slices or the two outer vertical walls. The two holes of each pair are aligned along a transverse axis. According to the non-limiting embodiment, a mechanical axis, advantageously secured by a pin or key, may be used to immobilize the boom 6, on or relative to the pivot sleeve 50, 51, in a given sliding position.

[0121] Advantageously, the crane 1 includes a stabilizer 140, 141, 142, 143. The stabilizer 140, 141, 142, 143 is arranged to support and / or stabilize the crane 1.

[0122] The stabilizer 140, 141, 142, 143 comprises at least three retractable legs 143, or four legs according to the embodiment. The at least three legs 143 are (completely and freely) rotatable, without angle limit, relatively to chassis 2, 3. According to the embodiment, the at least three legs 143 are (completely and freely) rotatable with respect to a vertical axis included in the median longitudinal plane.

[0123] According to the embodiment, the stabilizer 140, 141, 142, 143 comprises a rotating plate base 140, 141, 142 mounted under the chassis 2, 3 (under the main bridge 2 according to the embodiment). The base 140, 141, 142 comprises a plate 140 fixed under the main bridge 2 and a rotating plate 142 relative to the fixed plate. The rotating plate 142 rotates (completely and freely) relative to the fixed plate 140.

[0124] The base 140, 141, 142 includes a mechanical bearing, a ball bearing according to the embodiment, housed in the circular part 141 of the base 140, 141, 142. The mechanical bearing is arranged to allow the rotation of the rotating plate 142 relative to the fixed plate 140. Alternatively, the base 140, 141, 142 can be defined as a ball bearing 140, 141, 142.

[0125] The at least three retractable legs 143 are mounted securely and retractably on the rotating plate 142. Thus, according to the embodiment, the rotation of the chassis 2, 3 relative to the at least three legs 143 is ensured by the pivoting plate 142.

[0126] According to the embodiment, the at least three legs 143 include, at their distal end, a pad intended to be brought into contact with the ground.

[0127] The stabilizer 140, 141, 142, 143 allows the crane 1 to be used in rough terrain (stairs for example), uneven terrain and / or sloping terrain.

[0128] According to a first alternative of the non-limiting embodiment illustrated in FIGURES 7 and 8, the grasping means is a clamp 7.

[0129] Clamp 7 can be pivoted relative to the distal end of arrow 6.

[0130] The clamp 7 can be pivoted by means of a jack 71 or any other means known to a person skilled in the art.

[0131] According to a second alternative of the non-limiting embodiment, the lifting means 9 can be mounted directly on the distal end of the boom 6.

[0132] According to the second alternative, the means or means of force transmission 8 are not necessary for lifting the load to be moved 16. In this case, the crane 1 does not include means of force transmission 8.

[0133] According to a third alternative, the mast 4 includes a fastening means 12 for the lifting system 9. The fastening means 12 is disposed on a slice of the mast 4. Advantageously, the fastening means 12 is disposed on the slice of the mast 4 opposite the distal end of the boom 6. Advantageously, the fastening means 12 projects beyond the slice of the mast 4. The fastening means 12 is arranged to fix the lifting system 9 on the slice of the mast 4. Advantageously, the fastening means 12 is disposed in the upper half of the mast 4 on the side of the mast head 4. According to the non-limiting embodiment, the fastening means 12 is disposed in the upper quarter (in particular at the level of, near, in contact with, or opposite the mast head 4). The lifting means 12 cooperates with the force transmission means 8.

[0134] This third alternative also allows the use of only the actuable / pivotable elements of crane 1 (in particular the lifting system). 9 and the jack 10) while remaining in the immediate vicinity of the crane 1 (and in particular of the chassis 2, 3) by direct interaction.

[0135] Indeed, the attachment means 12 is advantageously positioned (on the mast 4 rather than at the distal end of the boom 6) to be directly accessible to the user. Thus, the positioning of the attachment means 12 according to the embodiment allows the use of a lifting means 9 and / or a jack. 10 non-motorized (preferably manually operated), which reduces the weight of the crane 1, increases its stability (due to the absence of motor load at its distal end), facilitates its movement (under load) and its assembly / disassembly.

[0136] According to the non-limiting embodiment of the third alternative illustrated in FIGURES 1, 2 and 6, the crane 1 comprises several force transmission means 8, 81, 82 (pulleys according to the embodiment). However, the invention does not preclude the crane 1 from comprising a single pulley 8, cooperating with the lifting means 9, located at the distal end of the boom 6.

[0137] According to the non-limiting embodiment of the third alternative, the crane comprises return pulleys 81, 82, and a pulley 8 located at the distal end of the boom 6. One return pulley 81 is mounted on the mast 4 (on the edge of the mast 4 according to the embodiment). Another return pulley 82 is mounted on the boom 6 (on the lower edge of the boom 6 according to the embodiment). Such an arrangement thus makes it possible to maintain a maximum lifting height by eliminating the height that would be lost by positioning the lifting system 9 under the distal end of the boom 6 or on a different area of ​​the crane 1 than that described according to the invention.

[0138] According to a first improvement of crane 1, the chassis 2, 3 includes a main bridge 2 and an auxiliary bridge 3.

[0139] The main deck 2 and the auxiliary deck 3 each comprise two respective stringers 20, 21 and 30, 31. Stringers 20, 30 extend along a first longitudinal axis, and stringers 21, 31 extend along a second longitudinal axis, distinct from the first longitudinal axis. Stringers 20, 21, 30, 31 are hollow tubes according to the non-limiting embodiment.

[0140] The spar 30 of the auxiliary deck 3 is mounted in the spar 20 of the main deck 2 and the spar 31 of the auxiliary deck 3 is mounted in a spar 21 of the main deck 3.

[0141] In other words, the spar 30 of the auxiliary deck 3 is inside or in the spar 20 of the main deck 2 and the spar 31 of the auxiliary deck 3 is inside or in a spar 21 of the main deck 3.

[0142] The presence of the longitudinal members 30, 31 of the auxiliary bridge 3 in the longitudinal members 20, 21 of the main bridge 2 improves the stability of the crane 1 and also increases the resistance of the chassis 2, 3 to stresses.

[0143] Advantageously, the side members 30, 31 of the auxiliary bridge 3 are arranged to slide in the side members 20, 21 of the main bridge 2. Thus, the side members 20, 21, 30, 31 are arranged to adjust, by sliding the side members 30, 31 of the auxiliary bridge 3 in the respective side member 20, 21 of the main bridge 2, a wheelbase of the chassis 2, 3.

[0144] Thus, a wheelbase of the chassis 2, 3 of the crane 1 according to the invention is modular.

[0145] According to the non-limiting embodiment, the main bridge 2 and the auxiliary bridge 3 are arranged to adopt four distinct positions by sliding the side members 30, 31 within their respective side members 20, 21, so that the chassis 2, 3 can have four distinct wheelbases. The crane 1 according to the invention can therefore be adjusted according to the weight of the load 16 to be transported and the available maneuvering space. Increasing the wheelbase of the chassis 2, 3 will allow the movement of a heavier load 16, albeit with an increase in the overall dimensions of the crane 1.

[0146] In one of the four positions, called the short or compact position, the stringers 30, 31 of the auxiliary deck 3 are almost entirely inserted into the stringers 20, 21 of the main deck 2. In other words, a residual space is preserved or persists between the auxiliary deck 3 and the main deck 2.

[0147] The stringers 30, 31 of the auxiliary deck 3 are, at a minimum, partially inserted into the stringers 20, 21 of the main deck 2. The stringers 30, 31 of the auxiliary deck 3 can be inserted, gradually, into the stringers 20, 21 of the main deck 2 until they are almost entirely inserted into the latter.

[0148] According to the non-limiting embodiment, the four positions / wheelbases adopted by the chassis 2, 3, in the direction of the enlargement of the chassis 2, 3, by relative sliding of the longitudinal members 30, 31, 20, 21 can be a compact position, a medium position, a wide position and an extra-wide position.

[0149] The arrangement of the main bridge 2 and auxiliary bridge 3, in particular the sliding aspect of the longitudinal members 30, 31 in the longitudinal members 20, 21, makes it possible to increase the resistance to stress, creep, torsion of the chassis 2, 3. In addition, the arrangement of the main bridge 2 and auxiliary bridge 3, in particular the sliding aspect of the longitudinal members 30, 31 in the longitudinal members 20, 21, makes it possible to improve the stability of the crane 1.

[0150] Also, the more the stringers 30, 31 of the auxiliary bridge 3 are inserted, inserted or pushed into the stringers 20, 21 of the main bridge 2, the more the stability and resistance of the crane 1 will be improved.

[0151] In order to improve the stability and resistance to stresses (torsion and creep) of the crane 1, in particular of the chassis 2, 3, the main bridge 2 includes two crossbeams 25, 26 mounted between the two longitudinal members 20, 21 of the main bridge 2. However, as illustrated in FIGURE 5, the crane 1 may include more than two crossbeams 25, 26.

[0152] According to the embodiment, the two cross members 25, 26 extend between and are mounted on the inner edges or walls of the two longerons 20, 21 of the main deck 2. One cross member 26 is located at the end, called the proximal end, of the inner walls of the two longerons 20, 21 situated on the side of the auxiliary deck 3. Another cross member 25 is located at the end, called the distal end, of the inner walls of the two longerons 20, 21 situated on the side opposite the auxiliary deck 3.

[0153] According to a second improvement, combinable with the first improvement, the main bridge 2 includes a cross member 22 and the auxiliary bridge 3 a cross member 32. Each cross member 22, 32 extends along a transverse axis distinct from the crane 1. Each cross member 22, 32 forms an end which can be a front or rear end of the chassis 2, 3.

[0154] Advantageously, the two cross members 25, 26 each include a rod (or mechanical axis) extending along a longitudinal axis. The rod of the cross member 26 extends proximally (i.e., on the side of the auxiliary bridge 3) and the rod of the cross member 25 extends distally (i.e., on the opposite side of the auxiliary bridge 3 or in the longitudinal direction extending from the auxiliary bridge 3 towards the main bridge 2).

[0155] According to the second improvement, the main axle 2 comprises two half-axles 23, 24 and the auxiliary axle 3 comprises two half-axles 33, 34. Each of the half-axles 23, 24, 33, 34 comprises one of the wheels 230, 240, 330, 340. The two half-axles 23, 24 of the main axle 2 are mounted opposite each other in the cross member 22 of the main axle 2. The two half-axles 33, 34 of the auxiliary axle 3 are mounted opposite each other in the cross member 32 of the auxiliary axle 3.

[0156] According to the embodiment presented, the two half-axles 23, 24 of the main bridge 2 each comprise a swiveling wheel 230, 240. The two half-axles 33, 34 of the auxiliary bridge 3 each comprise a swiveling wheel 330, 340. However, as previously stated, it is envisaged that the two half-axles 23, 24 of the main bridge 2 each comprise a fixed (or non-swiveling) wheel 230, 240 and that the two half-axles 33, 34 of the auxiliary bridge 3 each comprise a swiveling wheel 330, 340.

[0157] According to the non-limiting embodiment, the transverse uprights 22, 32 and the half-axles 23, 24, 33, 34 are hollow tubes. Preferably, the half-axles 23, 24, 33, 34 are arranged so that the swiveling wheels 230, 240, 330, 340 are located on either side, relative to the longitudinal axis, (in other words, on each side) of the chassis 2, 3.

[0158] Advantageously, according to the second improvement, the two half-axles 23, 24 of the main axle 2 are arranged to slide independently of each other, opposite each other, in the transverse upright 22 of the main axle 2. The two half-axles 33, 34 of the auxiliary axle 3 are arranged to slide independently of each other, opposite each other, in the transverse upright 32 of the auxiliary axle 3. In one of the three positions, called the narrow position, the assembly of half-axles are fully inserted into the transverse uprights 22, 32.

[0159] Thus, the spacing of the swivel wheels 230, 240, 330, 340 of the crane 1 according to the invention is adjustable. Preferably, the spacing of the swivel wheels 230, 240, 330, 340 can be adjusted using the lifting support 15 (described below).

[0160] According to the non-limiting embodiment, each of the two half-axles 33, 34 of the auxiliary bridge 3 and each of the two half-axles 23, 24 of the main bridge 2 is arranged to independently adopt three distinct sliding positions, so that each swiveling wheel 230, 240, 330, 340 can have three distinct spacings. The spacing of the crane 1 according to the invention can therefore be adjusted according to the height and / or weight and / or volume of the load 16 to be transported.

[0161] Increasing the spacing of the swivel wheels 230, 240, 330, 340 improves the stability of crane 1. In particular, increasing the spacing of the swivel wheels 230, 240, 330, 340 also allows the crane 1 to move under load, especially in case of swaying.

[0162] According to the non-limiting embodiment, the adjustment of the spacing of the swiveling wheels 230, 240, 330, 340 in three distinct positions, as well as the adjustment of the wheelbase of the chassis 2, 3 in four distinct positions, is achieved by any mechanical linkage or mechanical assembly mechanism. The assembly mechanism according to the embodiment is of the mechanical axle type, preferably with a pin or key. However, the use of other assembly methods, such as, for example, a mortise and tenon joint, a splice, or a stud / screw system, is not precluded.

[0163] In practice, with regard to the wheelbase of the chassis 2, 3 in four distinct positions, four pairs of holes are provided in each longitudinal member 30, 31 of the auxiliary bridge 3. The two holes of each pair are aligned and opposite each other along a transverse axis for the four pairs of holes of the longitudinal members 30, 31.

[0164] One orifice of a considered pair is provided in a vertical wall (or slice) of each spar 30, 31 and the other orifice of the considered pair is provided in the opposite vertical wall (or slice) of each spar 30, 31.

[0165] A pair of holes is provided in each spar 20, 21 of the main deck so as to be aligned successively with the four pairs of holes of the spars 30, 31 by sliding the spars 30, 31 into the spars 20, 21.

[0166] In practice, with regard to the spacing of the pivoting wheels 230, 240, 330, 340 in three distinct positions, three pairs of holes are provided in each half-axle 23, 24, 33, 34. The two holes of each pair are aligned and opposite each other along a longitudinal axis for the three pairs of holes of the half-axles 23, 24, 33, 34.

[0167] An opening of a pair considered is provided in a vertical wall (or slice) of each half-axle 23, 24, 33, 34 and the other opening of the pair considered is provided in the opposite vertical wall (or slice) of each half-axle 23, 24, 33, 34.

[0168] Two pairs of holes are provided in each cross members 22, 32 so as to be aligned successively, each independently, with the three pairs of holes of the half-axles 23, 24, 33, 34 by sliding the half-axles 23, 24, 33, 34 in the cross members 22, 32. According to the embodiment, one pair of holes is provided on one side of the median longitudinal plane, preferably near or on the end, of each cross member 22, 23, and the other pair of holes is provided on the other side of the median longitudinal plane, preferably near or on the end, of each cross member 22, 23.

[0169] According to a third improvement, the base of mast 4 is mounted pivotally around a transverse axis extending between the two deck stringers 20 and 21. main 2, on said main bridge 2. The base of the jack 10 is mounted pivotally, around a transverse axis, on the main bridge 2.

[0170] Thus, the pivoting of the mast 4 around an axis extending between the two longitudinal members 20, 21, in particular between the inner edge of the longitudinal members 20, 21, makes it possible to reduce the center of gravity of the crane 1 and consequently to improve stability by limiting the risks of tipping of the crane 1, in particular in case of swaying.

[0171] In addition, the longitudinal members 20, 21 of the main bridge 2 straddle the base of the mast 4, which increases the stability of the crane 1 and the resistance to stresses (in particular torsion and creep) of the chassis 2, 3 and therefore of the crane 1.

[0172] Furthermore, the sliding of the auxiliary deck 3 stringers 30, 31 within the main deck 2 stringers 20, 21 allows the auxiliary deck 3 stringers 30, 31 (in addition to the main deck 2 stringers 20, 21) to straddle the base of the mast 4. This further increases the stability of the crane 1 and the resistance to stresses (particularly torsion and creep) of the chassis 2, 3 and therefore of the crane 1. This effect is maximized when the chassis 2, 3 (and the crane 1) is in the compact position (i.e., the auxiliary deck 30, 31 stringers are almost entirely inserted into the main deck 2 stringers 20, 21).

[0173] Advantageously, the base of the jack 10 is mounted on the proximal cross member 26. This has the effect of further offsetting and distributing the force and / or torque exerted by the load 16 on the crane 1, further improving the stability of the crane 1. This also allows for the movement of significantly heavier loads 16 and the activation of the crane 1 under load. It also helps to limit the risk of the crane 1 tipping, particularly in the event of sway. Furthermore, all the aforementioned effects are achieved without limiting the travel or overhang provided by the boom 6.

[0174] According to the third improvement to the non-limiting embodiment, and by way of non-limiting example, the base of the mast 4 comprises a foot 180, 181 extending along a transverse axis (perpendicular to the mast 4). The foot 180, 181 and mast 4 are integral and inseparable according to the embodiment. The base 180, 181 is mounted on the chassis 2, 3.

[0175] As a non-limiting example, the foot 180, 181 forms two arms 180, 181 (or two half-crossbeams) extending on either side of the base of the mast 4. The spars 20, 21 each include an opening (preferably an opening passing through each vertical wall of each spar 20, 21) opposite each other and extending along the same transverse axis. Each arm 180, 181 includes a lateral opening designed to cooperate with the opening of a respective spar 20, 21. Two mechanical shafts are arranged to be inserted, each through one of the two sets of openings (arm 180 / spar 20 and arm 181 / spar 21), preferably fitted with a key. Mast 4 is thus mounted or secured, in particular in a fixed manner, on the chassis 2, 3 by means of the mechanical axes.

[0176] Thus, the resistance to stress of mast 4 is improved.

[0177] All the improvements in the non-limiting embodiment are combinable.

[0178] According to the invention, the mast 4 is adapted and / or arranged to pivot by an angle between 25° beyond the vertical on the side of the jack 10 (or the side opposite the distal end of the boom 6), i.e. an angle of 25° formed between the vertical and the mast 4 when the mast is pivoted on the side of the jack 10 (or the side opposite the distal end of the boom 6), and 40° beyond the vertical on the side opposite the jack (or the side of the distal end of the boom 6), i.e. an angle of 40° formed between the vertical and the mast 4 when the mast is pivoted on the side opposite the jack 10 (or the side of the distal end of the boom 6).

[0179] Advantageously, the crane 1 includes a means for limiting the slewing angle 11 of the mast 4. By way of non-limitation, the means for limiting the slewing angle 11 limits the slewing angle of the mast 4 to a value less than or equal to 25° beyond the vertical on the side of the jack 10 (or on the opposite side to the distal end of the arrow 6), that is to say the angle formed between the vertical and the mast 4 when the mast is pivoted on the side of the jack 10 (or on the opposite side to the distal end of the arrow 6), and to an angle value less than or equal to 40° beyond the vertical on the opposite side to the jack (or on the side of the distal end of the arrow 6), that is to say the angle formed between the vertical and the mast 4 when the mast is pivoted on the opposite side to the jack 10 (or on the side of the distal end of the arrow 6).

[0180] According to a non-limiting embodiment, the pivot angle limiting means 11 is a stop, groove, or gutter. The gutter 11 is formed on the frame 2, 3, preferably projecting beyond the inner edge of the main deck 2's longitudinal members 20, 21, according to a non-limiting example of the embodiment. Advantageously, the base (or foot) 180, 181 of the mast 4 pivots in the gutter 11, which limits the pivot angle of the mast 4. Furthermore, the gutter 11 also facilitates the assembly of the crane 1 by providing a housing for the mast 4 (alone and unloaded), which can be placed (and repositioned) in the gutter 11 while awaiting assembly.

[0181] Advantageously, the crane 1 includes a lifting support 15. The lifting support 15 is intended to be mounted on the chassis 2, 3. The lifting support 15 includes a pivot 151, a ball joint 151 according to the embodiment, arranged to relieve and / or support, in part, the load 16 of the crane 1 and / or the weight of the crane 1 so as to allow rotation, under load, of the crane 1 around the pivot 151.

[0182] The lifting support 15 can be mounted in any position on the chassis 2, 3. This allows a pivot point of the crane 1 to be created in any position of the crane 1 (of the chassis 2, 3).

[0183] The rotation of the crane 1 (and therefore the rotation of the load 16), when it is relieved of part of the load (i.e. part of the load 16 lifted and part of the weight of the crane) by the lifting support 15 (regardless of the position of the lifting support 15), is improved and controlled.

[0184] Preferably, the lifting support 15 is mounted in the center of the cross member 22 of the main bridge 2. In this case, the rotation of the crane 1, when relieved of part of the load (i.e., part of the lifted load 16 and part of the crane's weight) by the lifting support 15, is facilitated by locking the swivel wheels 230, 240 at a pivot angle of 0° or 180° (due to the positioning of the lifting support 15 (and therefore of the pivot 151) in the median longitudinal plane). Accordingly, it is advantageous to leave the wheels 330, 340 freely swiveling.

[0185] In this preferred embodiment, it is advantageous that the vertical (transverse) plane comprising the axis of the lifting support 15, and in particular the vertical axis of the pivot 151 of the lifting support 15, and the vertical (transverse) plane comprising and connecting the centers of rotation of the wheels 230, 240 are coincident in the same vertical (transverse) plane.

[0186] The crane 1 may include an extension 19 or jib 19. The extension 19 is mounted on the distal end of the boom 6.

[0187] All the characteristics and elements relating to arrow 6, and in particular to the distal end of arrow 6, according to the invention are transposable and applicable to extension 19.

[0188] According to the embodiment, the extension 19 includes a pivotable joint 190 mounted about a transverse axis on the distal end of the arrow 6. Thus, the extension 19 is pivotable relative to the arrow 6.

[0189] According to a first mode of operation of the crane 1, shown in FIGURES 1 to 8, the main deck 2 and the auxiliary deck 3 are arranged and / or assembled, and / or the boom 6 is mounted on the mast 4, so that the distal end of the boom 6 can be cantilevered in relation to the cross member 22 of the main deck 2. In other words, in this first mode of operation, the load 1 is opposite or facing the mast 4 and the main deck 2 but not the jack 10 (or the auxiliary deck 3).

[0190] The first operating mode allows the use of counterweights 130. Also, the first operating mode is particularly suitable for heavy loads 16.

[0191] Crane 1 includes housings or locations suitable for receiving, in a removable manner, counterweights 130.

[0192] Advantageously, the locations are arranged and / or rest, in part, on the transverse post 32 of the auxiliary bridge 3. Advantageously, the locations rest and / or are arranged, at least in part, on a distal quarter, located on the side opposite the main bridge 2, of the auxiliary bridge 3. In other words, the locations are arranged on the side of the frame 2, 3 opposite the distal end of the boom 6 (and in particular the load 16).

[0193] According to the non-limiting embodiment, the locations rest and / or are arranged on the cross member 32, on the stringers 30, 31 of the auxiliary deck 3 and on the stringers 20, 21 of the main deck 2 in the compact position, or respectively in the compact and medium positions, and rest and / or are arranged (only) on the cross member 32 and on the stringers 30, 31 of the auxiliary deck 3 in the medium, wide and extra-wide positions, or respectively in the wide and extra-wide positions.

[0194] This arrangement of the counterweights 130 allows for an increase in the load transportable by the crane 1. This arrangement also provides an optimal overhang for the load 16.

[0195] Furthermore, the arrangement of the crane 1 according to the invention, in particular the arrangement of the counterweight locations 130 associated with the increase in the wheelbase of the chassis 2, 3 according to the invention, makes it possible to considerably increase the load 16 transportable by the crane 1.

[0196] Advantageously, the transverse post 32 of the auxiliary bridge 3 and / or the stringers 30, 31 of said auxiliary bridge 3 and / or the stringers 20, 21 of the main bridge 2 include coupling means 271, 272, 273, 274 arranged to immobilize, reversibly, at least one counterweighted 130 barge 13.

[0197] According to the non-limiting embodiment, the coupling means 271, 272, 273, 274 are arranged to receive, in a removable manner, two bins 13. Each of the bins 13 comprises two compartments and each compartment can receive several counterweights 130.

[0198] Advantageously, a central space, preferably extending along and / or coinciding with the median longitudinal plane, is provided between the two trays 13. In this way, particularly (but not exclusively) in the compact configuration of the chassis 2, 3, the central space accommodates the cylinder 10 (and / or the two trays 13 are positioned on either side of the median longitudinal plane) and also allows the cylinder 10 to pivot within the central space. Furthermore, the central space also allows the lifting support 15 to be mounted on the, preferably in the center of the, transverse upright 32.

[0199] By way of non-limiting example, each side member 20, 21 includes two fixed studs 273, 274, the cross member 32 of the auxiliary bridge 3 includes two pairs of fixed studs 271, preferably one pair per bin 13, and each side member 30, 31 of the auxiliary bridge 3 includes a sliding stud 272 along the side member 30, 31. The sliding studs 272 allow the bins to be mounted regardless of the wheelbase of the crane 1 (i.e. regardless of the position adopted by the chassis 2, 3: compact, medium, wide or extra-wide). Each stud 271, 272, 273, 274 is arranged to cooperate with a separate notch provided on the underside of the bins 13 so that the bins 13 are immobilized on the chassis 2, 3. In the compact position of the chassis 2, 3, the residual space between the auxiliary bridge 3 and the main bridge 2 is occupied by the sliding studs 272.

[0200] According to the embodiment, each bin 13 includes a central partition separating the two compartments. The central partition of each bin is also arranged to form a handle facilitating the mounting / dismounting, by the operator, of the (empty) bins 13 onto the frame 2, 3. In addition, the handle is also arranged to form an attachment area for a lifting device, which allows the bins 13 loaded with counterweights 130 to be mounted / dismounted onto the frame 2, 3.

[0201] According to an advantageous embodiment of the second improvement implemented with the first operating mode of the crane 1, the cross member 22 of the main deck 2 is mounted pivotally, relative to a longitudinal axis, on the main deck 2, in a transverse plane (perpendicular to the longitudinal pivot axis of the cross member 22).

[0202] Advantageously, the cross member 22 of the main bridge 2 is mounted pivotally, relative to a longitudinal axis, on the cross member 25, in a transverse plane (perpendicular to the longitudinal pivot axis of the cross member 22).

[0203] Advantageously, the vertical walls of the cross member 22 include two openings, aligned and opposite each other along the longitudinal axis, arranged to receive the rod 250 of the cross member 25. The cross member 22 is pivotally mounted on the cross member 25. Thus, the cross member 22 is pivotally mounted relative to the side members 20, 21 and the frame 2, 3.

[0204] This arrangement improves the stability of the crane 1 and significantly reduces swaying by allowing the cross member 22 (and therefore the wheels 230, 240 of the main axle 2) to pivot freely relative to the chassis 2, 3. Indeed, the pivoting of the cross member 22 allows the crane 1 to absorb the movements and stresses transmitted to it (and in particular to the mast 4 and therefore to the load 16) by unevenness / irregularities in the ground (holes, grooves, protrusions, etc.) and / or by small obstacles on the ground (gravel, pebbles, etc.) and / or by differences in ground level. In this way, the four wheels 230, 240, 330, and 340 are constantly in contact with the ground.

[0205] Advantageously, the cross member 22 includes a device for limiting the pivoting range of the cross member 22 (and therefore of the wheels 230, 240) relative to the cross member 25 (and therefore to the frame 2, 3). Typically, the pivoting range is advantageously limited to an angle of ±3°, or 1.5° in the non-limiting embodiment, relative to the cross member 25 (or to the longitudinal and / or horizontal plane along which the frame 2, 3 extends, or to the longitudinal and / or horizontal plane comprising (or coinciding with) the frame 2, 3). In the non-limiting embodiment, the pivoting range limiting device comprises two projecting elements of the cross member 22 extending each inside a respective spar 20, 21 of the main deck 2. Each projecting element of the cross member 22 cooperates with a respective stop disposed in its respective spar 20, 21 of the main deck 2. By way of non-limiting example, each of the two projecting elements of the cross member 22 is a plate or plate comprising an oblong hole (whose length extends vertically) and the stop disposed in each spar 20, 21 is a fixed mechanical axis, preferably through and extending along a transverse axis, extending inside the oblong hole.

[0206] According to the advantageous embodiment of the second improvement implemented with the first operating mode of the crane 1, the vertical wall of the cross member 32 opposite the cross member 26 includes an opening, aligned along the longitudinal axis, arranged to receive the rod of the cross member 26. In the compact position, the rod of the cross member 26 is housed in the opening of the cross member 32.

[0207] According to a second mode of operation of the crane 1 (not shown in the FIGURES), the main deck 2 and the auxiliary deck 3 are arranged and / or assembled, and / or the boom 6 is mounted on the mast 4, so that the distal end of the boom 6 can be cantilevered from the cross member 32 of the auxiliary deck 3.

[0208] In other words, in this second mode of operation, the load 16 is opposite or facing the mast 4, preferably opposite the auxiliary bridge 3, and preferably even opposite the transverse upright 32.

[0209] In the second operating mode, no counterweight is required. Crane 1 can move loads 16 within small areas (rooms in a house or premises). The overhang is limited, but the range of motion is the same. Thus, the load 16 can be moved, particularly vertically, due to the mobility of crane 1 under load.

[0210] As a non-limiting example, and advantageously, the wheelbase of chassis 2, 3 (i.e. the position adopted by chassis 2, 3) is extra-wide according to the second operating mode.

[0211] Of course, the invention is not limited to the examples just described and many modifications can be made to these examples without departing from the scope of the invention.

[0212] Thus, in combinable variants of the previously described embodiments: - in the compact position, the wheelbase of crane 1 (i.e. the distance between wheels 230, 240 and wheels 330, 340) is 1100 mm, and / or - in the extra-wide wheelbase, the wheelbase of crane 1 (i.e., the distance between wheels 230, 240 and wheels 330, 340) is 1760 mm, and / or - in the narrow position, the spacing of the swivel wheels 230, 240, 330, 340 is 580 mm, and / or - in the widest spacing of the swivel wheels 230, 240, 330, 340, the width of crane 1 is 900 mm, and / or - the crane 1 according to the embodiment allows a maximum or useful lifting height of the lifting hook 171 of the chain 17 of 3090 mm (without use of extension 19 mounted on the boom 6), of 3520 mm with the extension 19 mounted on the boom 6 and of 4950 mm with the extension 19 mounted on the boom 6 and with an additional extension or with a longer boom, and / or - the crane 1 allows (according to the first operating mode) to reach a maximum distance between the lifting hook 171 and the end of the chassis 2, 3 (i.e. the main bridge 2) of 2522 mm, and / or - Crane 1 includes a 200mm drawbar, and / or - according to the first operating mode of crane 1, the drawbar 200 is mounted on the auxiliary bridge 3, preferably the drawbar 200 is mounted on the transverse upright 32 of the auxiliary bridge 3, and / or - according to the second operating mode of crane 1, the drawbar 200 is mounted on the main deck 2, preferably the drawbar 200 is mounted on the transverse upright 22 of the main deck 2, and / or - the crane includes a guardrail 300, and / or - the guardrail 300 is mounted on the main deck 2, preferably the guardrail 300 is mounted on the cross member 22 of the main deck 2, and / or - whatever the mode of operation, refinement, improvement, or mode of operation of the crane 1, with reference to FIGURES 7 and 8, the boom 6 is slidable in the sleeve 50 by means of a jack 72 or any other means known to the person skilled in the art.

[0213] Furthermore, the different features, forms, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or mutually exclusive.

Claims

DEMANDS 1. Portable and mobile construction crane under load (1), referred to as crane (1), comprising: - a chassis (2, 3) on which four wheels (230, 240, 330, 340) are mounted, at least two of which are swiveling, - a mast (4) whose base is pivotally mounted on said chassis, said mast being pivotable, in a median longitudinal plane of the crane, around a transverse axis, - a boom (6) fixed to the top of said mast, said boom being pivotable, relative to said top of said mast, around a transverse axis, and sliding, on the top of said mast, along a sliding axis included in the median longitudinal plane of the crane, adjustable by pivoting said boom; said boom being capable of receiving: • a means of gripping (7) a load to be moved (16), or • one or more means of transmitting force (8) intended to support, at least in part, a load to be moved (16) and / or a means of lifting (9) said load to be moved, - a jack (10), arranged to pivot said mast so as to support a distal end of said boom cantilevered from said frame, of which: • a base is mounted pivoting around a transverse axis distinct from the transverse axis around which the mast pivots, on the chassis, • a head is mounted pivotally, around a transverse axis, on an upper quarter of the mast located on the side of said head of said mast, said jack being pivotable, relative to the mast and the chassis, in the median longitudinal plane of the crane.

2. Crane (1) according to claim 1, wherein the chassis (2, 3) comprises a bridge (2), referred to as the main bridge (2), and a bridge (3), referred to as the auxiliary bridge (3), said main bridge and, respectively, said auxiliary bridge each comprising: - two longerons (20, 21), and respectively two longerons (30, 31), each extending along a longitudinal axis distinct from the crane, - a transverse upright (22), and respectively a transverse upright (32); each respective transverse upright extends along a transverse axis distinct from the crane, one of said transverse uprights forming a front end of said chassis and the other of said transverse uprights forming a rear end of said chassis, - two half-axles (23, 24), and respectively two half-axles (33, 34); the two half-axles (23, 24) of the cross member (22) of the main bridge (2) each comprise a swiveling or non-swiveling wheel (230, 240), and the two half-axles (33, 34) of the cross member (32) of the auxiliary bridge comprise two swiveling wheels (330, 340); said two half-axles being mounted opposite each other, in the transverse upright of said main bridge, and respectively in the transverse upright of said auxiliary point, each longitudinal member (30, 31) of the auxiliary bridge is mounted in a respective longitudinal member (20, 21) of the main bridge, the base of the mast (4) is mounted pivotally, around a transverse axis extending between said two longitudinal members of said main bridge, on said main bridge, the base of the jack (10) is mounted pivotally, around a transverse axis, on said main bridge.

3. Crane (1) according to the preceding claim, in which the two half-axles (23, 24) of the main bridge (2) are mounted to slide opposite each other in the cross member (22) of said main bridge, and the two half-axles (33, 34) of the auxiliary bridge (3) are mounted to slide opposite each other in the cross member (32) of said auxiliary bridge, to adjust the position of the wheels (230, 240, 330, 340), relative to the chassis (2, 3), in several spacings.

4. Crane (1) according to claim 2 or 3, wherein each side member (30, 31) of the auxiliary bridge (3) is mounted to slide within a respective side member (20, 21) of the main bridge (2) to adjust, by sliding a side member of said auxiliary bridge within a respective side member of said main bridge, a spacing between the cross member (22) of said main bridge and the cross member (32) of said auxiliary bridge between several wheelbases between the two half-axles (23, 24) of said main bridge and the two half-axles (33, 34) of said auxiliary bridge.

5. Crane (1) according to any one of claims 2 to 4, wherein the main bridge (2) comprises two crossbeams (25, 26) mounted between the two spars (20, 21) of said main bridge; one of the crossbeams is disposed on a quarter, referred to as the proximal quarter, of said main bridge located on the side opposite the distal end of the boom (6) and another of the crossbeams is disposed on a quarter, referred to as the distal quarter, of said main bridge located on the side of said distal end of said boom.

6. Crane (1) according to the preceding claim, in which the base of the jack (10) is pivotally mounted on the cross member (26) disposed on the proximal quarter of the main bridge (2).

7. Crane (1) any one of claims 2 to 6, wherein the main deck (2) and the auxiliary deck (3) are arranged so that the distal end of said boom can be cantilevered from the cross member (22) of the main deck (2).

8. Crane (1) according to the preceding claim, wherein the transverse post (22) of the main bridge (2), relative to which the distal end of the boom (6) is intended to be cantilevered, is pivotally mounted, relative to a longitudinal axis, on the chassis (2, 3).

9. Crane (1) according to any one of claims 2 to 6, wherein the main deck (2) and the auxiliary deck (3) are arranged so that the distal end of said boom can be cantilevered from the cross member (32) of the auxiliary deck (3).

10. Crane (1) any one of claims 2 to 9, comprising locations arranged to receive, in a removable manner, counterweights (130); said locations being disposed, in part, on the transverse post (32) of the auxiliary bridge (3).

11. Crane (1) according to the preceding claim, wherein the locations are included in at least one tray (13); the cross member (32) of the auxiliary deck (3) and / or the stringers (30, 31) of said auxiliary deck and / or the stringers (20, 21) of the main deck (2) include coupling means (271, 272, 273, 274) arranged to immobilize, in a removable manner, at least one tray.

12. Crane (1) according to any one of the preceding claims, comprising a pivot sleeve (50, 51) pivotally mounted on the mast head (4); the boom (6) is mounted in said pivot sleeve and said pivot sleeve being arranged to slide and pivot said boom (6).

13. Crane (1) according to any one of the preceding claims, comprising a means for limiting the pivot angle (11) of the mast (4) between 25° beyond the vertical on the side of the jack (10) and 40° beyond the vertical on the opposite side of said jack.

14. Crane (1) according to any one of the preceding claims, wherein the mast (4) includes a hooking means (12), for the lifting system (9), arranged to fix, on a slice of said mast, said lifting system being disposed in the upper half of said mast on the side of the head of said mast; said lifting means cooperating with the force transmission means (8).

15. Crane (1) according to any one of the preceding claims, comprising a stabilizer (140, 141, 142, 143) arranged to support and / or stabilize the crane, said stabilizer comprising at least three retractable and rotating legs (143) about a vertical axis, relative to the chassis 2, 3.

16. Crane (1) according to any one of the preceding claims, comprising a lifting support (15) mounted on the chassis (2, 3), said lifting support comprising a pivot (151) arranged to relieve and / or support, in part, the load carried by the crane and / or the weight of the crane, so as to allow rotation, under load, of the crane around said pivot.

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