EP3393962A1 - Raising unit, crane with raisable jib comprising such a raising unit, and method for assembling such a crane - Google Patents

Raising unit, crane with raisable jib comprising such a raising unit, and method for assembling such a crane

Info

Publication number
EP3393962A1
EP3393962A1 EP16812997.1A EP16812997A EP3393962A1 EP 3393962 A1 EP3393962 A1 EP 3393962A1 EP 16812997 A EP16812997 A EP 16812997A EP 3393962 A1 EP3393962 A1 EP 3393962A1
Authority
EP
European Patent Office
Prior art keywords
lifting unit
jib
cylinder
foot
boom
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16812997.1A
Other languages
German (de)
French (fr)
Other versions
EP3393962B1 (en
Inventor
Michel Lissandre
Sylvain Raymond
Gabriel FRAISSE
Michael Mollenthiel
Tania GARCIA LOVERA
Florent MOURIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP3393962A1 publication Critical patent/EP3393962A1/en
Application granted granted Critical
Publication of EP3393962B1 publication Critical patent/EP3393962B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/344—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes adapted for transport purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/365—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes dismantable into smaller units for transport purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm

Definitions

  • the present invention relates to a lifting unit for composing a luffing jib crane.
  • the present invention relates to a luffing jib crane comprising such a lifting unit.
  • the present invention relates to an assembly method for assembling such a luffing jib crane.
  • the present invention applies to the field of tower cranes comprising a luffing jib.
  • the present invention is applicable to several crane structures, for example to structures composed of lattices and frames.
  • GB1374253A discloses a tower crane comprising a mast, a luffing jib, a lifting unit and a turning device for rotating the lifting unit.
  • the lift unit of GB1374253A comprises a proximal part of the luffing jib, a counter-boom supporting a balancing ballast, a securing part arranged between the boom and the counter-boom, and a jack which is substantially vertical. and which is connected, on the one hand, to the boom and, on the other hand, to the mast.
  • the lifting unit of GB1374253A is cumbersome, which makes it necessary to detach the cylinder from the boom and the mast before transporting the crane.
  • the connecting elements between boom, cylinder and mast are exposed to shocks and pollution, which reduces their service life as the multiple disassemblies of the crane.
  • the operations of assembly or disassembly of the crane are quite long.
  • the number of parts to be managed and stored separately is relatively large.
  • the present invention is intended in particular to solve, in whole or in part, the problems mentioned above.
  • the present invention relates to a lifting unit, for composing a luffing jib crane, the lifting unit comprising at least:
  • an arrow foot intended to form the proximal part of an arrow belonging to the luffing jib crane when the lifting unit is in a service configuration
  • a counter-arrow configured to support a weight intended to balance the arrow
  • a securing part arranged between the foot of the boom and the counter-boom, the securing part comprising a securing portion configured to secure the lifting unit to a mast of the luffing jib crane, and
  • a cylinder comprising a first cylinder part and a second cylinder part, the first cylinder part being mechanically connected to the boom foot so that the boom foot is movable at least between a lowered position and a raised position,
  • the lifting unit being configured to be placed at least: in a service configuration, in which the jack can move the jib foot between the lowered position and the raised position, and
  • the lifting unit being characterized in that the second cylinder part is mechanically connected to the securing part.
  • the jack extends between the foot of the arrow and the against-arrow.
  • the jack is in a retracted position.
  • the second part of the cylinder is not mechanically connected to the mast of the crane.
  • such a lifting unit has a relatively small footprint, because the cylinder is mechanically connected firstly to the foot of the arrow and secondly to the securing part.
  • the lifting unit can be transported, assembled on a crane, then disassembled from a crane as a unitary block, that is to say by keeping all its components (foot of arrow, counter boom, securing part, cylinder) mechanically connected to each other.
  • the connecting elements of the jib foot, the fastening part, the jib and the jacks can remain mechanically connected permanently, in particular during the initial assembly at the factory, during transport, storage, assembly, disassembly, corrective or preventive maintenance of the lifting unit.
  • a lifting unit reduces the duration of assembly or disassembly operations of the luffing jib crane. Moreover, such a lifting unit improves the safety of the operators responsible for these assembly or disassembly operations. In addition, such a lifting unit reduces the number of parts to be managed and stored separately, because all the components of the lifting unit remain attached to each other.
  • the foot of the arrow corresponds to the base of the arrow, that is to say to the proximal part of the arrow.
  • the boom foot generally compasses a pivot axis, around which the cylinder raises or lowers the boom when the lifting unit is in use.
  • the boom foot is movable between a lowered position and a raised position when the lifting unit is in use.
  • proximal and distal characterize an element according to its position, near or far, with respect to the counter-arrow.
  • a proximal member is relatively close to the jib, while a distal member is relatively far from the jib.
  • the securing part comprises a punch.
  • the securing portion is configured to join by embedding at the top of the mast of the luffing jib crane.
  • the securing portion has a generally triangular section in a vertical plane including the vertical axis about which the arrow rotates when the luffing jib crane is in use.
  • the securing part may for example have a prismatic shape with a triangular base or a tetrahedral shape with a triangular base.
  • the lifting unit further comprises a hoist winch for lifting a load suspended from the boom.
  • the securing portion directly connects the foot of the arrow to the against-arrow.
  • the securing portion may indirectly connect the foot of the arrow to the against-arrow, that is to say with at least one intermediate component between the foot of the arrow and the counter-arrow.
  • the against-arrow is arranged opposite the foot of the arrow relative to the securing portion.
  • the counter-boom is arranged opposite the foot of the boom relative to the mast when the lifting unit is assembled on the luffing jib crane in the service configuration.
  • the counter-boom performs the counterweight function to compensate for the dead weight of the boom plus the weight of the load suspended from the boom.
  • the securing part further comprises a connecting portion which is configured to mechanically connect the boom foot to the against-arrow.
  • Such a connecting portion provides mechanical cohesion of several components of the lifting unit.
  • the first cylinder part and the second cylinder part are each equipped with a hinge ball joint, and the first cylinder part and the second cylinder part are mechanically connected respectively to the boom foot and to the securing part not only in the service configuration but also in the transport configuration.
  • the cylinder remains attached to the jib foot at each assembly and disassembly of the luffing jib crane. It is therefore not necessary to separate the cylinder from the boom foot.
  • the lifting unit forms a unitary block easy to transport, to assemble on a crane and to disassemble a crane.
  • this unit block protects the cylinder.
  • the jack is located generally between a distal region of the foot of the boom and the securing portion.
  • Such a cylinder does not exceed or little of a volume defined by the foot of the arrow and the against-arrow.
  • the lifting unit has a small footprint, which makes it easily transportable and manipulable.
  • the jack is totally located in a volume delimited on the one hand by the foot of the boom and on the other by the counter-boom.
  • the jack is a linear jack configured to move from a retracted position, in which the boom foot is in the lowered position, to an extended position, in which the boom foot is in the raised position, the jack in the retracted position extending in a cylinder direction which forms an angle of between -30 degrees and +30 degrees with a horizontal direction when the lifting unit is in the transport configuration.
  • the lifting unit can be stored and transported in a conventional container (40 feet) whose bottom wall is horizontal.
  • the jack direction is substantially parallel to the horizontal direction.
  • the first cylinder portion is located on a distal end portion of the cylinder, and the second cylinder portion is located on a proximal end portion of the cylinder.
  • the first actuator portion may be located at the distal end of the actuator, and the second actuator portion may be located at the proximal end of the actuator.
  • the jack is configured to be in the retracted position when the lifting unit is in the transport configuration.
  • the lifting unit is particularly compact in transport configuration.
  • the cylinder rod is protected in this transport configuration.
  • the jack is also in the retracted position when the lifting unit is in the handling, storage, assembly, disassembly and maintenance phases.
  • the cylinder can be protected, particularly its rod, against aggression, shocks, corrosion and external pollution during all handling of the cylinder.
  • the boom foot comprises an upper part and a lower part, the upper part being situated above the lower part when the lifting unit is in service configuration with the foot of the boom in the lowered position.
  • the lifting unit further comprising a pivot axis arranged between the jib foot and the counter-jib so that the pivot axis is situated higher than the lower part when the lifting unit is in the service configuration with the boom foot in the lowered position, the upper part being fixed to the pivot axis and the lower part being fixed to the first part of the jack, so that the jack can push the boom along an axis extending substantially in the extension of the lower chords of the boom when the lifting unit is in the service configuration with the boom foot lowered.
  • the pivot axis is located substantially at the altitude of the upper part when the lifting unit is in the service configuration with the foot lowered.
  • this makes it possible to keep the fluidic and / or electrical connections of the jack in the retracted position when the lifting unit is in transport configuration (compact).
  • the jack generally bears on the vertical mast of the luffing jib crane, which involves disconnecting the jack before transporting the components of the luffing jib crane.
  • the pivot axis is mechanically connected to the securing part not only in the service configuration but also in the transport configuration.
  • the pivot axis is provided with articulation ball joints.
  • the lifting unit further comprises a feeding device configured to supply energy to the jack so as to raise the jib foot, the feed device being fixed to the counter-boom so that the feeder can be transported with the counter-boom when the lifting unit is in transport configuration.
  • Such a cylinder supply device is transportable with the other components of the lifting unit, which eliminates the disassembly of the supply device.
  • the feed device is removably attached to the boom.
  • the feed device can be detached and transported separately from the other components of the lifting unit or the handling or assembly machine, which is useful when the transport vehicle has a small capacity.
  • the jack is a hydraulic linear jack
  • the feed device is a hydraulic unit.
  • the jack is an electric linear jack
  • the power device is a power plant.
  • the lifting unit further comprises:
  • conduits for conducting liquid between the feeder and the jack and
  • quick couplings arranged between the jack and the feeder, the quick couplers being located closer to the feeder than to the jack.
  • the quick couplers are placed in the junction region between the counter-jib and the securing part.
  • the hydraulic unit is located near the cylinder.
  • the lifting unit has a maximum length of less than 12 m, a maximum width of less than 2.25 m and a maximum height of less than 2.5 m.
  • the size of the lifting unit substantially corresponds to the road transport templates, rail or maritime.
  • the bulk of the lifting unit is smaller than the volume of a conventional container 40 feet long, which allows to easily transport the lifting unit. So these dimensions allow the foot of the arrow to remain always connected to the against-arrow via the securing part.
  • the securing part comprises ribs assembled so as to form an indeformable assembly.
  • such an indeformable assembly forms, on one side, a part embedded in the mast to support the counter-arrow and, on the other side, a hinge support for the foot of the arrow, so for the arrow.
  • the ribs of the securing part are dismountably assembled.
  • the ribs of the securing part are assembled in a way that can not be dismantled.
  • the securing part is monobloc.
  • the counter-arrow and the securing portion are monobloc.
  • the securing portion extends the against-arrow at the top of the mast.
  • the lifting unit further comprises a rotation device which is configured to rotate the lifting unit about a substantially vertical axis when the lifting unit is in operation.
  • a rotation device can be transported in the unit block forming the lifting unit, which dispenses with mounting and dismounting the rotation device.
  • the present invention relates to a luffing jib crane comprising:
  • a mast configured to support the boom and the suspended load
  • a lifting unit according to the invention, the lifting unit being mechanically connected to the mast and secured to the boom.
  • the rotation device comprises a cabin unit.
  • the cabin unit and the rotation device can be assembled separately.
  • the luffing jib crane further comprises a rotation device configured to rotate the luffing unit and the luffing jib about a substantially vertical axis when the luffing jib crane is in use.
  • the against-arrow and the securing part are mechanically connected by embedding.
  • the present invention relates to a method of assembling a luffing jib crane according to the invention, comprising the steps:
  • the assembly method further comprises a step of balancing the luffing jib crane by placing ballast on the counter-jib.
  • the assembly method further comprises a step of setting security. After this adjustment step, the cylinder can push the foot of arrow, so raise the arrow.
  • Figure 1 is a side view of a lifting unit according to the invention, in a transport configuration;
  • Figure 2 is a perspective view of the lifting unit of Figure 1;
  • Figure 3 is a side view of a cons-arrow component of the lifting unit of Figure 1;
  • Figure 4 is a perspective view of the against-arrow of Figure 3;
  • Figure 5 is a side view of several components of the lifting unit of Figure 1;
  • Figure 6 is a perspective view of the components shown in Figure 5;
  • Figure 7 is a side view of a portion of a luffing jib crane according to the invention and comprising the lifting unit of Figure 1;
  • Figure 8 is an enlarged view of Detail VIII in Figure 7;
  • Figure 9 is a flow chart illustrating an assembly method according to the invention.
  • FIGs 1, 2, 3, 4, 5 and 6 illustrate a lifting unit 1 according to the invention, to compose a luffing jib crane 100.
  • the luffing jib crane 100 is illustrated in Figures 8 and 9.
  • the crane luffing jib 100 includes:
  • an arrow 102 which is configured to distribute a suspended load not shown
  • a mast 104 which is configured to support the boom and the suspended load
  • the lifting unit 1 which is mechanically connected to the mast 104 and secured to the arrow 1 02, as described below, and
  • a cabin unit 1 07 which is here fixed on the mast 104.
  • the lifting unit 1 comprises a jib 2, a counter-jib 4, a securing part 6 and a jack 8.
  • the lifting unit 1 is configured to be placed:
  • the lifting unit 1 has a maximum length L1 of less than 1 2 m, a maximum width W1 of less than 2.25 m and a maximum height H 1 of less than 2.5 m.
  • the jib foot 2 is intended to form the proximal part of the jib 102 when the lifting unit 1 is in the service configuration (FIGS. 7 and 8).
  • the counter-jib 4 is configured to support a weight 5 intended to balance the boom 102.
  • the counter-jib 4 comprises i) a rear portion 4.2 having a ballast receiving space 5 and ii) retaining rods. 4.5 arranged to guide and retain the ballast 5.
  • the bottom of the counter-arrow 4 comprises a platform extending from the rear portion 4.2 to the securing portion 6.
  • the securing part 6 comprises:
  • a securing portion 6.1 which is configured to secure the lifting unit 1 to the mast 1 04;
  • a connecting portion 6.2 which is configured to mechanically connect the jib foot 2 to the counter-jib 4.
  • the securing portion 6.1 is configured to be secured by fitting to the top 105 of the mast 104.
  • the securing portion 6.1 is here secured to the top 105 of the mast 104 by pins 6.10.
  • the against-arrow 4 and the connecting portion 6.2 are here mechanically connected by embedding, so integral and without degree of mobility between them.
  • the connecting portion 6.2 is arranged between the jib 2 and the counter-jib 4.
  • the connecting portion 6.2 connects, here directly, the jib 2 to the counter-jib 4.
  • the jib 2 and the against -flèche 4 are mechanically connected via the connecting portion 6.2.
  • the securing part 6 here comprises chords 6.0 assembled so as to form an indeformable assembly.
  • the chords 6.0 are here assembled removably.
  • the securing portion 6 supports the boom 102 when the luffing jib crane 1 00 is in use, the securing portion 6 is sometimes referred to as "boom".
  • the securing part 6 has a generally triangular section in a vertical plane including the substantially vertical axis Z around which the arrow 102 rotates when the luffing jib crane 100 is in use.
  • the securing part 6 here has a prismatic shape with a triangular base, as shown in FIG. 2.
  • the cylinder 8 comprises a first cylinder part 8.1 and a second cylinder part 8.2.
  • the first part of cylinder 8.1 is mechanically connected to the foot of the boom 2 so that the boom foot 2 is movable between the position lowered and the position raised.
  • the jack 8 makes it possible to raise or lower the jib 102, by means of the jib foot 2.
  • the first jack portion 8.1 is located at the distal end of the cylinder 8.
  • the first cylinder part 8.1 is mechanically connected to the jib 2 by a pivot connection about a pivot axis Y8.1 visible in FIGS. 5 and 6.
  • the second cylinder portion 8.2 is mechanically connected to the connecting portion 6.2.
  • the second cylinder portion 8.2 is located on the proximal end of the cylinder 8.
  • the second cylinder portion 8.2 is mechanically connected to the connecting portion 6.2 by a pivot connection about a pin axis. pivot Y8.2 visible in Figures 5 and 6.
  • the jack 8 is here a hydraulic linear cylinder, which is configured to move from a retracted position, in which the jib foot 2 is in the lowered position, to an extended position, in which the jib foot 2 is in the raised position.
  • the first cylinder part 8.1 and the second cylinder part 8.2 are each equipped with a hinge ball joint.
  • the first part of cylinder 8.1 is mechanically connected to the foot of the boom 2, by its hinge joint, not only in the service configuration but also in the transport configuration.
  • the second cylinder portion 8.2 is mechanically connected, by its hinge joint, to the connecting portion 6.2 not only in the service configuration but also in the transport configuration.
  • the lifting unit 1 further comprises a feeding device 10 which is configured to supply energy to the jack 8 so as to raise the jib foot 2.
  • the feed device 10 is here a hydraulic unit configured to feed the jib. cylinder 8 in hydraulic energy. When powered, the jack 8 can raise the jib foot 2.
  • the feed device 1 0 is here relatively close to the jack 8, opposite to the location provided for the ballast 5.
  • the feeder 10 is attached to the counter-boom 4.
  • the feeder 10 can thus be transported with the counter-boom 4 when the lifting unit 1 is in the transport configuration.
  • the feeder 10 can remain attached to the counter-boom 4.
  • the jack 8 is a linear jack configured to pass:
  • the jack 8 extends between the jib foot 2 and the counter-jib 4.
  • the jack 8 is located generally between a region distal of the jib 2 and the securing portion 6.
  • the jack 8 is here completely located in a volume defined on the one hand by the foot of arrow 2 and on the other by the counter-arrow 4.
  • the cylinder direction X8 here forms an angle A8 approximately equal to -20 degrees with the horizontal direction X, as shown in Figures 1 and 8.
  • the cylinder 8 is in the retracted position when the lifting unit 1 is in transport configuration.
  • the cylinder 8 is also in the retracted position when the lifting unit 1 is in handling, storage, assembly, disassembly and maintenance phases.
  • the cylinder 8 can also be in the retracted position when the lifting unit 1 is in the service configuration with the jib foot 2 in the lowered position.
  • the lifting unit 1 further comprises ducts 12 for conducting the liquid between the supply device 10 and the cylinder 8.
  • the lifting unit 1 comprises quick couplers 14 arranged between the jack 8 and the device The quick couplers 14 are located closer to the supply device 10 than the cylinder 8. The quick couplers 14 can be placed in the junction region 4.6 between the counter-jib 4 and the securing part 6.
  • the boom foot 2 comprises an upper part 2.1 and a lower part 2.2.
  • the upper part 2.1 is located above the lower part 2.2 when the lifting unit 1 is in service configuration with the foot of the boom 2 lowered ( Figures 5 and 6).
  • the lifting unit 1 further comprises a pivot axis Y2.4.
  • the pivot axis Y2.4 is arranged between the foot of the arrow 2 and the counter-arrow.
  • the pivot axis Y2.4 is located higher than the lower part 2.2 when the lifting unit 1 is in service configuration with the foot of arrow 2 lowered ( Figures 5 and 6).
  • the pivot axis Y2.4 is here substantially at the altitude of the upper part 2.1 when the lifting unit 1 is in the service configuration with the foot of the boom 2 lowered.
  • the upper part 2.1 is fixed to the pivot axis Y2.4 and the lower part 2.2 is fixed to the first cylinder part 8.1.
  • the jack 8 can thus push the boom 2 along an axis of extension extending substantially in the extension of the lower chords 102.0 of the boom 102 when the lifting unit 1 is in the service configuration with the foot of the boom 2 lowered ( Figures 5 and 6).
  • This extension axis corresponds here to the horizontal direction X shown in FIG.
  • the jib foot 2 When the luffing jib crane 100 is in use, with the luffing unit 1 is in use, the jib foot 2 forms the proximal portion of the jib 102.
  • the jib foot 2 includes the jib axis. pivoting Y2.4, around which the cylinder 8 raises or lowers the boom 102.
  • the boom foot 2 is movable between a lowered position ( Figures 5, 6, 8 and 9) and a raised position when the lifting unit 1 is in use.
  • the pivot axis Y2.4 is mechanically connected to the securing part 6 not only in the service configuration but also in the transport configuration.
  • the pivot axis Y2.4 is provided with articulation ball joints.
  • the lifting unit 1 can be transported as a unitary block retaining all its interconnected components.
  • the connecting elements of the jib foot 2, the counter-jib 4, the securing part 6 and the cylinder 8 can remain connected (mechanically, hydraulically and / or electrically) permanently.
  • the lifting unit 1 here comprises a rotation device 16 which is configured to rotate the lifting unit 1 and the lifting boom 102 relative to the mast 104 and around the substantially vertical axis Z when the crane with luffing arrow 100 is in use.
  • the rotation device 16 is usually called the orientation ring.
  • the fastening portion 6 makes it possible to support the counter-jib 4 on one side and to support the jib 2, so the entire jib arrow 102, on the other side.
  • the counter-jib 4 is arranged opposite the jib 2 with respect to the mast 104.
  • the lifting unit 1 further comprises a hoisting winch for lifting a load suspended from the boom 102.
  • FIG. 9 illustrates an assembly method 200 according to the invention.
  • the assembly method 200 comprises in particular the steps:
  • the assembly method 200 here comprises a step 206 consisting in balancing the luffing jib crane 1 00 by placing ballast 5 on the counter-jib 4.
  • the assembly method 200 includes a step 207 of setting security. After this adjustment step 207, the jack 8 can push the jib foot 2, thus raising the jib 102.

Landscapes

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

Abstract

What is proposed is a raising unit (1) comprising: – a jib root (2) forming the proximal portion of a jib in the service configuration, – a counter-jib (4) supporting a counterweight (5), – a securing portion (6) between the jib root (2) and the counter-jib (4) for securing the raising unit (1) to a tower (104), and – an actuator (8) connected to the jib root (2) such that the jib root (2) is able to move between a lowered position and a raised position. The second actuator portion (8.2) being connected to the securing portion (6). Also proposed is a tower crane (100) comprising such a raising unit (1). Additionally proposed is a method (200) for assembling such a crane (100).

Description

UNITE DE RELEVAGE, GRUE A FLECHE RELEVABLE COMPRENANT UNE TELLE UNITE DE RELEVAGE ET PROCEDE D'ASSEMBLAGE  LIFT UNIT, RECEIVABLE BALL CRANE COMPRISING SUCH LIFT UNIT AND ASSEMBLY METHOD
D'UNE TELLE GRUE  Such a crane
La présente invention concerne une unité de relevage pour composer une grue à flèche relevable. De plus, la présente invention concerne une grue à flèche relevable comprenant une telle unité de relevage. Par ailleurs, la présente invention concerne un procédé d'assemblage pour assembler une telle grue à flèche relevable.  The present invention relates to a lifting unit for composing a luffing jib crane. In addition, the present invention relates to a luffing jib crane comprising such a lifting unit. Furthermore, the present invention relates to an assembly method for assembling such a luffing jib crane.
La présente invention s'applique au domaine des grues à tour comprenant une flèche relevable. La présente invention peut s'appliquer à plusieurs structures de grues, par exemple aux structures composées de treillis et de membrures.  The present invention applies to the field of tower cranes comprising a luffing jib. The present invention is applicable to several crane structures, for example to structures composed of lattices and frames.
GB1374253A décrit une grue à tour comprenant un mât, une flèche relevable, une unité de relevage et un dispositif de rotation pour faire tourner l'unité de relevage. L'unité de relevage de GB1374253A comprend une partie proximale de la flèche relevable, une contre-flèche supportant un lest d'équilibrage, une partie de solidarisation agencée entre la flèche et la contre-flèche, ainsi qu'un vérin qui est sensiblement vertical et qui est relié, d'une part, à la flèche et, d'autre part, au mât.  GB1374253A discloses a tower crane comprising a mast, a luffing jib, a lifting unit and a turning device for rotating the lifting unit. The lift unit of GB1374253A comprises a proximal part of the luffing jib, a counter-boom supporting a balancing ballast, a securing part arranged between the boom and the counter-boom, and a jack which is substantially vertical. and which is connected, on the one hand, to the boom and, on the other hand, to the mast.
Cependant, l'unité de relevage de GB1374253A est encombrante, ce qui impose de détacher le vérin de la flèche et du mât avant de transporter la grue. Or, en configuration désassemblée, les éléments de liaison entre flèche, vérin et mât sont exposés aux chocs et aux pollutions, ce qui réduit leur durée de vie au fur et à mesure des multiples désassemblages de la grue. En outre, les opérations d'assemblage ou de désassemblage de la grue sont assez longues. Par ailleurs, le nombre de pièces à gérer et à stocker séparément est relativement grand.  However, the lifting unit of GB1374253A is cumbersome, which makes it necessary to detach the cylinder from the boom and the mast before transporting the crane. However, in disassembled configuration, the connecting elements between boom, cylinder and mast are exposed to shocks and pollution, which reduces their service life as the multiple disassemblies of the crane. In addition, the operations of assembly or disassembly of the crane are quite long. In addition, the number of parts to be managed and stored separately is relatively large.
La présente invention a notamment pour but de résoudre, en tout ou partie, les problèmes mentionnés ci-avant.  The present invention is intended in particular to solve, in whole or in part, the problems mentioned above.
Dans ce but, la présente invention a pour objet une unité de relevage, pour composer une grue à flèche relevable, l'unité de relevage comprenant au moins :  For this purpose, the present invention relates to a lifting unit, for composing a luffing jib crane, the lifting unit comprising at least:
un pied de flèche destiné à former la partie proximale d'une flèche appartenant à la grue à flèche relevable lorsque l'unité de relevage est en configuration de service, une contre-flèche configurée pour supporter un lest destiné à équilibrer la flèche, an arrow foot intended to form the proximal part of an arrow belonging to the luffing jib crane when the lifting unit is in a service configuration, a counter-arrow configured to support a weight intended to balance the arrow,
une partie de solidarisation agencée entre le pied de flèche et la contre- flèche, la partie de solidarisation comprenant une portion de solidarisation configurée pour solidariser l'unité de relevage à un mât de la grue à flèche relevable, et  a securing part arranged between the foot of the boom and the counter-boom, the securing part comprising a securing portion configured to secure the lifting unit to a mast of the luffing jib crane, and
un vérin comprenant une première partie de vérin et une deuxième partie de vérin, la première partie de vérin étant reliée mécaniquement au pied de flèche de sorte que le pied de flèche est mobile au moins entre une position abaissée et une position relevée,  a cylinder comprising a first cylinder part and a second cylinder part, the first cylinder part being mechanically connected to the boom foot so that the boom foot is movable at least between a lowered position and a raised position,
l'unité de relevage étant configurée pour être placée au moins : dans une configuration de service, dans laquelle le vérin peut déplacer le pied de flèche entre la position abaissée et la position relevée, et  the lifting unit being configured to be placed at least: in a service configuration, in which the jack can move the jib foot between the lowered position and the raised position, and
dans une configuration de transport, dans laquelle le pied de flèche est en position abaissée,  in a transport configuration, in which the boom foot is in the lowered position,
l'unité de relevage étant caractérisée en ce que la deuxième partie de vérin est reliée mécaniquement à la partie de solidarisation.  the lifting unit being characterized in that the second cylinder part is mechanically connected to the securing part.
En d'autres termes, le vérin s'étend entre le pied de flèche et la contre-flèche. Lorsque le pied de flèche est en position abaissée, le vérin est dans une position rentrée. Contrairement aux grues de l'état de la technique, la deuxième partie de vérin n'est pas reliée mécaniquement au mât de la grue.  In other words, the jack extends between the foot of the arrow and the against-arrow. When the jib foot is in the lowered position, the jack is in a retracted position. Unlike the cranes of the state of the art, the second part of the cylinder is not mechanically connected to the mast of the crane.
Ainsi, une telle unité de relevage a un encombrement relativement faible, car le vérin est relié mécaniquement d'une part au pied de flèche et d'autre part à la partie de solidarisation. Avec un encombrement relativement faible, l'unité de relevage peut être transportée, assemblée sur une grue, puis désassemblée d'une grue comme un bloc unitaire, c'est-à-dire en conservant tous ses composants (pied de flèche, contre-flèche, partie de solidarisation, vérin) reliés mécaniquement entre eux.  Thus, such a lifting unit has a relatively small footprint, because the cylinder is mechanically connected firstly to the foot of the arrow and secondly to the securing part. With a relatively small footprint, the lifting unit can be transported, assembled on a crane, then disassembled from a crane as a unitary block, that is to say by keeping all its components (foot of arrow, counter boom, securing part, cylinder) mechanically connected to each other.
Par conséquent, les éléments de liaison du pied de flèche, de la partie de solidarisation, de la contre-flèche et du vérin peuvent rester reliés mécaniquement en permanence, en particulier pendant l'assemblage initial en usine, pendant le transport, le stockage, le montage, le démontage, les maintenances correctives ou préventives de l'unité de relevage.  Consequently, the connecting elements of the jib foot, the fastening part, the jib and the jacks can remain mechanically connected permanently, in particular during the initial assembly at the factory, during transport, storage, assembly, disassembly, corrective or preventive maintenance of the lifting unit.
Ces liaisons permanentes permettent de protéger les éléments de liaison contre les chocs ou les pollutions, en particulier les rotules du pied de flèche et les articulations du vérin, donc de maximiser leur durée de vie. En effet, les rotules du pied de flèche et les articulations du vérin restent toujours reliés mécaniquement à la structure de l'unité de relevage. Or, dans une grue de l'état de la technique, les éléments de liaison, qui sont relativement fragiles, risquent d'être endommagées lors des multiples assemblages et désassemblages. These permanent connections make it possible to protect the connecting elements against shocks or pollution, in particular the ball joints of the foot of boom and the joints of the cylinder, so maximize their service life. Indeed, the ball joints of the boom and the joints of the cylinder are always mechanically connected to the structure of the lifting unit. However, in a crane of the state of the art, the connecting elements, which are relatively fragile, may be damaged during multiple assemblies and disassemblies.
De plus, une unité de relevage selon l'invention permet de réduire la durée des opérations d'assemblage ou de désassemblage de la grue à flèche relevable. Par ailleurs, une telle unité de relevage améliore la sécurité des opérateurs chargés de ces opérations d'assemblage ou de désassemblage. De plus, une telle unité de relevage diminue le nombre de pièces à gérer et à stocker séparément, car tous les composants de l'unité de relevage restent solidarisés les uns aux autres.  In addition, a lifting unit according to the invention reduces the duration of assembly or disassembly operations of the luffing jib crane. Moreover, such a lifting unit improves the safety of the operators responsible for these assembly or disassembly operations. In addition, such a lifting unit reduces the number of parts to be managed and stored separately, because all the components of the lifting unit remain attached to each other.
Le pied de flèche correspond à la base de la flèche, c'est-à-dire à la partie proximale de la flèche. Le pied de flèche compote généralement un axe de pivotement, autour duquel le vérin relève ou abaisse la flèche lorsque l'unité de relevage est en service. Le pied de flèche est mobile entre une position abaissée et une position relevée lorsque l'unité de relevage est en service.  The foot of the arrow corresponds to the base of the arrow, that is to say to the proximal part of the arrow. The boom foot generally compasses a pivot axis, around which the cylinder raises or lowers the boom when the lifting unit is in use. The boom foot is movable between a lowered position and a raised position when the lifting unit is in use.
Dans la présente demande, les termes « proximal » et « distal » caractérisent un élément selon sa position, proche ou éloignée, par rapport à la contre-flèche. Ainsi, un élément proximal est relativement proche de la contre-flèche, tandis qu'un élément distal est relativement éloigné de la contre-flèche.  In the present application, the terms "proximal" and "distal" characterize an element according to its position, near or far, with respect to the counter-arrow. Thus, a proximal member is relatively close to the jib, while a distal member is relatively far from the jib.
Selon une variante, la partie de solidarisation comprend un poinçon.  According to a variant, the securing part comprises a punch.
Selon une variante, la portion de solidarisation est configurée pour solidariser par encastrement au sommet du mât de la grue à flèche relevable.  According to a variant, the securing portion is configured to join by embedding at the top of the mast of the luffing jib crane.
Selon une variante, la partie de solidarisation a une section globalement triangulaire dans un plan vertical incluant l'axe vertical autour duquel la flèche tourne lorsque la grue à flèche relevable est en service. La partie de solidarisation peut par exemple avoir une forme prismatique à base triangulaire ou une forme tétraédrale à base triangulaire.  Alternatively, the securing portion has a generally triangular section in a vertical plane including the vertical axis about which the arrow rotates when the luffing jib crane is in use. The securing part may for example have a prismatic shape with a triangular base or a tetrahedral shape with a triangular base.
Selon une variante, l'unité de relevage comprend en outre un treuil de levage destiné à lever une charge suspendue à la flèche. Selon une variante, la partie de solidarisation relie directement le pied de flèche à la contre-flèche. Alternativement, la partie de solidarisation peut relier indirectement le pied de flèche à la contre-flèche, c'est-à-dire avec au moins un composant intermédiaire entre le pied de flèche et la contre- flèche. Alternatively, the lifting unit further comprises a hoist winch for lifting a load suspended from the boom. According to a variant, the securing portion directly connects the foot of the arrow to the against-arrow. Alternatively, the securing portion may indirectly connect the foot of the arrow to the against-arrow, that is to say with at least one intermediate component between the foot of the arrow and the counter-arrow.
Par définition, la contre-flèche est agencée à l'opposé du pied de flèche par rapport à la portion de solidarisation. La contre-flèche est agencée à l'opposé du pied de flèche par rapport au mât lorsque l'unité de relevage est assemblée sur la grue à flèche relevable en configuration de service. Ainsi, la contre-flèche remplit la fonction de contrepoids pour compenser le poids mort de la flèche plus le poids de la charge suspendue à la flèche.  By definition, the against-arrow is arranged opposite the foot of the arrow relative to the securing portion. The counter-boom is arranged opposite the foot of the boom relative to the mast when the lifting unit is assembled on the luffing jib crane in the service configuration. Thus, the counter-boom performs the counterweight function to compensate for the dead weight of the boom plus the weight of the load suspended from the boom.
Selon un mode de réalisation, la partie de solidarisation comprend en outre une portion de liaison qui est configurée pour relier mécaniquement le pied de flèche à la contre-flèche.  According to one embodiment, the securing part further comprises a connecting portion which is configured to mechanically connect the boom foot to the against-arrow.
Ainsi, une telle portion de liaison assure la cohésion mécanique de plusieurs composants de l'unité de relevage.  Thus, such a connecting portion provides mechanical cohesion of several components of the lifting unit.
Selon un mode de réalisation, la première partie de vérin et la deuxième partie de vérin sont sont équipées chacune d'une rotule d'articulation, et la première partie de vérin et la deuxième partie de vérin sont mécaniquement reliées respectivement au pied de flèche et à la partie de solidarisation non seulement dans la configuration de service mais aussi dans la configuration de transport.  According to one embodiment, the first cylinder part and the second cylinder part are each equipped with a hinge ball joint, and the first cylinder part and the second cylinder part are mechanically connected respectively to the boom foot and to the securing part not only in the service configuration but also in the transport configuration.
En d'autres termes, le vérin reste solidaire du pied de flèche à chaque montage et démontage de la grue à flèche relevable. Il n'est donc pas nécessaire de désolidariser le vérin du pied de flèche.  In other words, the cylinder remains attached to the jib foot at each assembly and disassembly of the luffing jib crane. It is therefore not necessary to separate the cylinder from the boom foot.
Ainsi, l'unité de relevage forme un bloc unitaire facile à transporter, à assembler sur une grue et à désassembler d'une grue. De plus, ce bloc unitaire protège le vérin.  Thus, the lifting unit forms a unitary block easy to transport, to assemble on a crane and to disassemble a crane. In addition, this unit block protects the cylinder.
Selon un mode de réalisation, le vérin est situé globalement entre une région distale du pied de flèche et la partie de solidarisation.  According to one embodiment, the jack is located generally between a distal region of the foot of the boom and the securing portion.
Ainsi, un tel vérin ne dépasse pas ou peu d'un volume délimité par le pied de flèche et la contre-flèche. L'unité de relevage a un faible encombrement, ce qui la rend facilement transportable et manipulable.  Thus, such a cylinder does not exceed or little of a volume defined by the foot of the arrow and the against-arrow. The lifting unit has a small footprint, which makes it easily transportable and manipulable.
Selon une variante, le vérin est totalement situé dans un volume délimité d'une part par le pied de flèche et d'autre part par la contre-flèche. Selon un mode de réalisation, le vérin est un vérin linéaire configuré pour passer d'une position rentrée, dans laquelle le pied de flèche est en position abaissée, à une position déployée, dans laquelle le pied de flèche est en position relevée, le vérin en position rentrée s'étendant selon une direction de vérin qui forme un angle compris entre -30 degrés et +30 degrés avec une direction horizontale lorsque l'unité de relevage est en configuration de transport. According to one variant, the jack is totally located in a volume delimited on the one hand by the foot of the boom and on the other by the counter-boom. According to one embodiment, the jack is a linear jack configured to move from a retracted position, in which the boom foot is in the lowered position, to an extended position, in which the boom foot is in the raised position, the jack in the retracted position extending in a cylinder direction which forms an angle of between -30 degrees and +30 degrees with a horizontal direction when the lifting unit is in the transport configuration.
Ainsi, l'unité de relevage peut être stockée et transportée dans un conteneur conventionnel (40 pieds) dont la paroi inférieure est horizontale.  Thus, the lifting unit can be stored and transported in a conventional container (40 feet) whose bottom wall is horizontal.
Selon une variante, lorsque le vérin est en position rentrée, la direction de vérin est sensiblement parallèle à la direction horizontale.  According to a variant, when the jack is in the retracted position, the jack direction is substantially parallel to the horizontal direction.
Selon une variante, la première partie de vérin est située sur une portion d'extrémité distale du vérin, et la deuxième partie de vérin est située sur une portion d'extrémité proximale du vérin. Par exemple, la première partie de vérin peut être située à l'extrémité distale du vérin, et la deuxième partie de vérin peut être située à l'extrémité proximale du vérin.  According to a variant, the first cylinder portion is located on a distal end portion of the cylinder, and the second cylinder portion is located on a proximal end portion of the cylinder. For example, the first actuator portion may be located at the distal end of the actuator, and the second actuator portion may be located at the proximal end of the actuator.
Selon un mode de réalisation, le vérin est configuré pour être en position rentrée lorsque l'unité de relevage est en configuration de transport.  According to one embodiment, the jack is configured to be in the retracted position when the lifting unit is in the transport configuration.
Ainsi, l'unité de relevage est particulièrement compacte en configuration de transport. De plus, la tige du vérin est protégée dans cette configuration de transport.  Thus, the lifting unit is particularly compact in transport configuration. In addition, the cylinder rod is protected in this transport configuration.
Selon une variante, le vérin est aussi en position rentrée lorsque l'unité de relevage est en phases de manipulation, de stockage, de montage, de démontage, de maintenance. Ainsi, le vérin peut être protégé, en particulier sa tige, contre les agressions, chocs, corrosions et pollutions extérieures durant toutes les manipulations du vérin.  According to one variant, the jack is also in the retracted position when the lifting unit is in the handling, storage, assembly, disassembly and maintenance phases. Thus, the cylinder can be protected, particularly its rod, against aggression, shocks, corrosion and external pollution during all handling of the cylinder.
Selon un mode de réalisation, le pied de flèche comprend une partie haute et une partie basse, la partie haute étant située au-dessus de la partie basse lorsque l'unité de relevage est en configuration de service avec le pied de flèche en position abaissée,  According to one embodiment, the boom foot comprises an upper part and a lower part, the upper part being situated above the lower part when the lifting unit is in service configuration with the foot of the boom in the lowered position. ,
l'unité de relevage comprenant en outre un axe de pivotement agencé entre le pied de flèche et la contre-flèche de sorte que l'axe de pivotement est situé plus haut que la partie basse lorsque l'unité de relevage est en configuration de service avec le pied de flèche en position abaissée, la partie haute étant fixée à l'axe de pivotement et la partie basse étant fixée à la première partie de vérin, de sorte que le vérin peut pousser la flèche suivant un axe s'étendant sensiblement dans le prolongement des membrures inférieures de la flèche lorsque l'unité de relevage est en configuration de service avec le pied de flèche abaissé. the lifting unit further comprising a pivot axis arranged between the jib foot and the counter-jib so that the pivot axis is situated higher than the lower part when the lifting unit is in the service configuration with the boom foot in the lowered position, the upper part being fixed to the pivot axis and the lower part being fixed to the first part of the jack, so that the jack can push the boom along an axis extending substantially in the extension of the lower chords of the boom when the lifting unit is in the service configuration with the boom foot lowered.
Ainsi, une telle position de l'axe de pivotement, autour duquel le vérin relève ou abaisse la flèche, libère un espace permettant d'implanter le vérin et de former un ensemble rigide. De plus, une telle position de l'axe de pivotement permet de libérer un espace suffisant pour loger le vérin, de sorte que le vérin peut pousser la flèche avec un effort relativement important tout en autorisant un encombrement global facilement transportable lorsque le vérin est en position rentrée.  Thus, such a position of the pivot axis, around which the cylinder raises or lowers the boom, frees a space for implanting the cylinder and form a rigid assembly. In addition, such a position of the pivot axis makes it possible to free a space sufficient to house the jack, so that the jack can push the boom with a relatively large force while allowing an overall space easily transportable when the jack is in position. retracted position.
Selon une variante, l'axe de pivotement est situé sensiblement à l'altitude de la partie haute lorsque l'unité de relevage est en configuration de service avec le pied de flèche abaissé. Ainsi, cela permet de conserver les connexions fluidiques et/ou électriques du vérin en position rentré lorsque l'unité de relevage est en configuration de transport (compacte). Inversement, dans l'état de la technique, le vérin prend généralement appui sur le mât vertical de la grue à flèche relevable, ce qui implique de déconnecter le vérin avant de transporter les composants de la grue à flèche relevable.  Alternatively, the pivot axis is located substantially at the altitude of the upper part when the lifting unit is in the service configuration with the foot lowered. Thus, this makes it possible to keep the fluidic and / or electrical connections of the jack in the retracted position when the lifting unit is in transport configuration (compact). Conversely, in the state of the art, the jack generally bears on the vertical mast of the luffing jib crane, which involves disconnecting the jack before transporting the components of the luffing jib crane.
Selon un mode de réalisation, l'axe de pivotement est mécaniquement relié à la partie de solidarisation non seulement dans la configuration de service mais aussi dans la configuration de transport.  According to one embodiment, the pivot axis is mechanically connected to the securing part not only in the service configuration but also in the transport configuration.
Selon une variante, l'axe de pivotement est muni de rotules d'articulation.  According to a variant, the pivot axis is provided with articulation ball joints.
Selon un mode de réalisation, l'unité de relevage comprend en outre un dispositif d'alimentation configuré pour alimenter en énergie le vérin de façon à relever le pied de flèche, le dispositif d'alimentation étant fixé à la contre-flèche de sorte que le dispositif d'alimentation peut être transporté avec la contre-flèche lorsque l'unité de relevage est en configuration de transport.  According to one embodiment, the lifting unit further comprises a feeding device configured to supply energy to the jack so as to raise the jib foot, the feed device being fixed to the counter-boom so that the feeder can be transported with the counter-boom when the lifting unit is in transport configuration.
Ainsi, un tel dispositif d'alimentation du vérin est transportable avec les autres composants de l'unité de relevage, ce qui dispense de démonter le dispositif d'alimentation.  Thus, such a cylinder supply device is transportable with the other components of the lifting unit, which eliminates the disassembly of the supply device.
Alternativement, le dispositif d'alimentation est fixé à la contre- flèche de manière amovible. Ainsi, le dispositif d'alimentation peut être détaché et transporté séparément des autres composants de l'unité de relevage ou de l'engin de manutention ou de montage, ce qui est utile lorsque le véhicule de transport a une petite capacité. Selon un mode de réalisation, le vérin est un vérin linéaire hydraulique, et le dispositif d'alimentation est une centrale hydraulique. Alternatively, the feed device is removably attached to the boom. Thus, the feed device can be detached and transported separately from the other components of the lifting unit or the handling or assembly machine, which is useful when the transport vehicle has a small capacity. According to one embodiment, the jack is a hydraulic linear jack, and the feed device is a hydraulic unit.
Alternativement à ce mode de réalisation, le vérin est un vérin linéaire électrique, et le dispositif d'alimentation est une centrale électrique.  Alternatively to this embodiment, the jack is an electric linear jack, and the power device is a power plant.
Selon un mode de réalisation, l'unité de relevage comprend en outre :  According to one embodiment, the lifting unit further comprises:
des conduits pour conduire le liquide entre le dispositif d'alimentation et le vérin, et  conduits for conducting liquid between the feeder and the jack, and
des raccords rapides agencés entre le vérin et le dispositif d'alimentation, les raccords rapides étant situés plus près du dispositif d'alimentation que du vérin.  quick couplings arranged between the jack and the feeder, the quick couplers being located closer to the feeder than to the jack.
Ainsi, de tels raccords rapides limitent les risques de fuites et de pollution du liquide de transmission d'énergie (exemple : huile) dans le vérin, car les conduits peuvent rester connectés au vérin linéaire hydraulique même lorsqu'on démonte la centrale hydraulique. De plus, tous les éléments démontables (vérin, raccord rapide) sont regroupés dans une même zone, ce qui facilite les travaux de maintenance.  Thus, such quick couplings limit the risk of leakage and pollution of the transmission fluid (eg oil) in the cylinder, because the ducts can remain connected to the hydraulic linear cylinder even when disassembling the hydraulic unit. In addition, all the removable elements (cylinder, quick coupling) are grouped in the same zone, which facilitates the maintenance work.
Selon une variante, les raccords rapides sont placés dans la région de jonction entre la contre-flèche et la partie de solidarisation.  According to one variant, the quick couplers are placed in the junction region between the counter-jib and the securing part.
Selon une variante, la centrale hydraulique est située près du vérin.  Alternatively, the hydraulic unit is located near the cylinder.
Selon un mode de réalisation, l'unité de relevage a une longueur maximale inférieure à 12 m, une largeur maximale inférieure à 2,25 m et une hauteur maximale inférieure à 2,5 m.  According to one embodiment, the lifting unit has a maximum length of less than 12 m, a maximum width of less than 2.25 m and a maximum height of less than 2.5 m.
Ainsi, l'encombrement de l'unité de relevage correspond sensiblement aux gabarits de transports routiers, ferroviaires ou maritimes. Par exemple, l'encombrement de l'unité de relevage est inférieur au volume d'un conteneur conventionnel de 40 pieds de long, ce qui permet de transporter facilement l'unité de relevage. Donc ces dimensions permettent au pied de flèche de rester toujours connecté à la contre-flèche par l'intermédiaire de la partie de solidarisation.  Thus, the size of the lifting unit substantially corresponds to the road transport templates, rail or maritime. For example, the bulk of the lifting unit is smaller than the volume of a conventional container 40 feet long, which allows to easily transport the lifting unit. So these dimensions allow the foot of the arrow to remain always connected to the against-arrow via the securing part.
Selon un mode de réalisation, la partie de solidarisation comprend des membrures assemblées de façon à former un ensemble indéformable.  According to one embodiment, the securing part comprises ribs assembled so as to form an indeformable assembly.
Ainsi, un tel ensemble indéformable forme, d'un côté, une partie encastrée au mât pour soutenir la contre-flèche et, de l'autre côté, un support d'articulation pour le pied de flèche, donc pour la flèche. Selon une variante, les membrures de la partie de solidarisation sont assemblées de manière démontable. Thus, such an indeformable assembly forms, on one side, a part embedded in the mast to support the counter-arrow and, on the other side, a hinge support for the foot of the arrow, so for the arrow. According to a variant, the ribs of the securing part are dismountably assembled.
Alternativement à cette variante, les membrures de la partie de solidarisation sont assemblées de manière indémontable. En d'autres termes, la partie de solidarisation est monobloc.  Alternatively to this variant, the ribs of the securing part are assembled in a way that can not be dismantled. In other words, the securing part is monobloc.
Selon une variante, la contre-flèche et la portion de solidarisation sont monoblocs. Dans cette variante, la portion de solidarisation prolonge la contre-flèche au niveau du sommet du mât.  According to a variant, the counter-arrow and the securing portion are monobloc. In this variant, the securing portion extends the against-arrow at the top of the mast.
Selon une variante, l'unité de relevage comprend en outre un dispositif de rotation qui est configuré pour faire tourner l'unité de relevage autour d'un axe sensiblement vertical lorsque l'unité de relevage est en service. Ainsi, un tel dispositif de rotation peut être transporté dans le bloc unitaire formant l'unité de relevage, ce qui dispense de monter et démonter le dispositif de rotation.  According to a variant, the lifting unit further comprises a rotation device which is configured to rotate the lifting unit about a substantially vertical axis when the lifting unit is in operation. Thus, such a rotation device can be transported in the unit block forming the lifting unit, which dispenses with mounting and dismounting the rotation device.
De plus, la présente invention a pour objet une grue à flèche relevable comprenant :  In addition, the present invention relates to a luffing jib crane comprising:
une flèche configurée pour distribuer une charge suspendue,  an arrow configured to dispense a suspended load,
un mât configuré pour supporter la flèche et la charge suspendue, et une unité de relevage selon l'invention, l'unité de relevage étant reliée mécaniquement au mât et solidarisée à la flèche.  a mast configured to support the boom and the suspended load, and a lifting unit according to the invention, the lifting unit being mechanically connected to the mast and secured to the boom.
Selon une variante, le dispositif de rotation comporte une unité de cabine. Alternativement, l'unité de cabine et le dispositif de rotation peuvent être assemblés séparément.  According to one variant, the rotation device comprises a cabin unit. Alternatively, the cabin unit and the rotation device can be assembled separately.
Selon une variante, la grue à flèche relevable comprend en outre un dispositif de rotation configuré pour faire tourner l'unité de relevage et la flèche relevable autour d'un axe sensiblement vertical lorsque la grue à flèche relevable est en service.  Alternatively, the luffing jib crane further comprises a rotation device configured to rotate the luffing unit and the luffing jib about a substantially vertical axis when the luffing jib crane is in use.
Selon un mode de réalisation, la contre-flèche et la partie de solidarisation sont reliées mécaniquement par encastrement.  According to one embodiment, the against-arrow and the securing part are mechanically connected by embedding.
Par ailleurs, la présente invention a pour objet un procédé d'assemblage d'une grue à flèche relevable selon l'invention, comprenant les étapes :  Furthermore, the present invention relates to a method of assembling a luffing jib crane according to the invention, comprising the steps:
dresser le mât,  train the mast,
fixer sur le mât un dispositif de rotation appartenant à l'unité de relevage,  attach to the mast a rotation device belonging to the lifting unit,
assembler l'unité de relevage sur le dispositif de rotation, relier mécaniquement la flèche au pied de flèche. assemble the lifting unit on the rotation device, mechanically connect the boom to the foot of the boom.
Ainsi, un tel procédé d'assemblage permet de diminuer la durée de désassemblage d'une grue à flèche relevable.  Thus, such an assembly method reduces the disassembly time of a luffing jib crane.
Selon une variante, le procédé d'assemblage comprend en outre une étape consistant à équilibrer la grue à flèche relevable en plaçant du lest sur la contre-flèche.  Alternatively, the assembly method further comprises a step of balancing the luffing jib crane by placing ballast on the counter-jib.
Selon une variante, le procédé d'assemblage comprend en outre une étape consistant à régler des sécurités. Après cette étape de réglage, le vérin peut pousser le pied de flèche, donc relever la flèche.  Alternatively, the assembly method further comprises a step of setting security. After this adjustment step, the cylinder can push the foot of arrow, so raise the arrow.
Les modes de réalisation et les variantes mentionnés ci-avant peuvent être pris isolément ou selon toute combinaison techniquement possible.  The embodiments and variants mentioned above may be taken individually or in any combination technically possible.
La présente invention sera bien comprise et ses avantages ressortiront aussi à la lumière de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif et faite en référence aux figures annexées, dans lesquelles des signes de références identiques correspondent à des objets structurellement et/ou fonctionnellement identiques ou similaires. Dans les figures annexées :  The present invention will be well understood and its advantages will also emerge in the light of the description which follows, given solely by way of nonlimiting example and with reference to the appended figures, in which identical reference signs correspond to objects structurally and / or functionally identical or similar. In the attached figures:
la figure 1 est une vue de côté d'une unité de relevage conforme à l'invention, dans une configuration de transport ; la figure 2 est une vue en perspective de l'unité de relevage de la figure 1 ;  Figure 1 is a side view of a lifting unit according to the invention, in a transport configuration; Figure 2 is a perspective view of the lifting unit of Figure 1;
la figure 3 est une vue de côté d'une contre-flèche composant l'unité de relevage de la figure 1 ;  Figure 3 is a side view of a cons-arrow component of the lifting unit of Figure 1;
la figure 4 est une vue en perspective de la contre-flèche de la figure 3 ;  Figure 4 is a perspective view of the against-arrow of Figure 3;
la figure 5 est une vue de côté de plusieurs composants de l'unité de relevage de la figure 1 ;  Figure 5 is a side view of several components of the lifting unit of Figure 1;
la figure 6 est une vue en perspective des composants illustrés à la figure 5 ;  Figure 6 is a perspective view of the components shown in Figure 5;
la figure 7 est une vue de côté d'une partie d'une grue à flèche relevable conforme à l'invention et comprenant l'unité de relevage de la figure 1 ; la figure 8 est une vue à plus grande échelle du détail VIII à la figure 7 ; et Figure 7 is a side view of a portion of a luffing jib crane according to the invention and comprising the lifting unit of Figure 1; Figure 8 is an enlarged view of Detail VIII in Figure 7; and
la figure 9 est un ordinogramme illustrant un procédé d'assemblage conforme à l'invention .  Figure 9 is a flow chart illustrating an assembly method according to the invention.
Les figures 1 , 2, 3, 4, 5 et 6 illustrent une unité de relevage 1 conforme à l'invention, pour composer une grue à flèche relevable 100. La grue à flèche relevable 100 est illustrée aux figures 8 et 9. La grue à flèche relevable 100 comprend :  Figures 1, 2, 3, 4, 5 and 6 illustrate a lifting unit 1 according to the invention, to compose a luffing jib crane 100. The luffing jib crane 100 is illustrated in Figures 8 and 9. The crane luffing jib 100 includes:
une flèche 102, qui est configurée pour distribuer une charge suspendue non représentée,  an arrow 102, which is configured to distribute a suspended load not shown,
un mât 104, qui est configuré pour supporter la flèche et la charge suspendue,  a mast 104, which is configured to support the boom and the suspended load,
l'unité de relevage 1 , qui est reliée mécaniquement au mât 104 et solidarisée à la flèche 1 02, comme décrit ci-après, et  the lifting unit 1, which is mechanically connected to the mast 104 and secured to the arrow 1 02, as described below, and
- une unité de cabine 1 07, qui est ici fixée sur le mât 104. - A cabin unit 1 07, which is here fixed on the mast 104.
L'unité de relevage 1 comprend un pied de flèche 2, une contre- flèche 4, une partie de solidarisation 6 et un vérin 8. L'unité de relevage 1 est configurée pour être placée :  The lifting unit 1 comprises a jib 2, a counter-jib 4, a securing part 6 and a jack 8. The lifting unit 1 is configured to be placed:
dans une configuration de service (figures 7 et 8), dans laquelle le vérin 8 peut déplacer le pied de flèche 2 entre une position abaissée et une position relevée, et  in a service configuration (FIGS. 7 and 8), in which the jack 8 can move the jib 2 between a lowered position and a raised position, and
dans une configuration de transport (figure 2), dans laquelle le pied de flèche 2 est en position abaissée et le vérin 8 est en position rentrée.  in a transport configuration (Figure 2), wherein the jib foot 2 is in the lowered position and the cylinder 8 is in the retracted position.
En configuration de transport (figure 2), l'unité de relevage 1 a une longueur maximale L1 inférieure à 1 2 m, une largeur maximale W1 inférieure à 2,25 m et une hauteur maximale H 1 inférieure à 2,5 m.  In the transport configuration (FIG. 2), the lifting unit 1 has a maximum length L1 of less than 1 2 m, a maximum width W1 of less than 2.25 m and a maximum height H 1 of less than 2.5 m.
Le pied de flèche 2 est destiné à former la partie proximale de la flèche 102 lorsque l'unité de relevage 1 est en configuration de service (figures 7 et 8).  The jib foot 2 is intended to form the proximal part of the jib 102 when the lifting unit 1 is in the service configuration (FIGS. 7 and 8).
La contre-flèche 4 est configurée pour supporter un lest 5 destiné à équilibrer la flèche 102. À cet effet, la contre-flèche 4 comprend i) une partie arrière 4.2 ayant un espace de réception du lest 5 et ii) des tiges de retenue 4.5 agencées pour guider et retenir le lest 5. Le bas de la contre-flèche 4 comprend une plate-forme s'étendant de la partie arrière 4.2 à la partie de solidarisation 6. Lorsque l'unité de relevage 1 est en service, le lest 5 supporté par la contre- flèche 4 sert à équilibrer la flèche 102 vis-à-vis du poids mort et de la charge levée. The counter-jib 4 is configured to support a weight 5 intended to balance the boom 102. For this purpose, the counter-jib 4 comprises i) a rear portion 4.2 having a ballast receiving space 5 and ii) retaining rods. 4.5 arranged to guide and retain the ballast 5. The bottom of the counter-arrow 4 comprises a platform extending from the rear portion 4.2 to the securing portion 6. When the lifting unit 1 is in use, the ballast 5 supported by the counter-boom 4 serves to balance the boom 102 with respect to screw dead weight and load lifted.
La partie de solidarisation 6 comprend :  The securing part 6 comprises:
une portion de solidarisation 6.1 qui est configurée pour solidariser l'unité de relevage 1 au mât 1 04 ; et  a securing portion 6.1 which is configured to secure the lifting unit 1 to the mast 1 04; and
une portion de liaison 6.2 qui est configurée pour relier mécaniquement le pied de flèche 2 à la contre-flèche 4.  a connecting portion 6.2 which is configured to mechanically connect the jib foot 2 to the counter-jib 4.
Dans l'exemple des figures, la portion de solidarisation 6.1 est configurée pour être solidarisée par encastrement au sommet 105 du mât 104. À cet effet, la portion de solidarisation 6.1 est ici solidarisée au sommet 105 du mât 104 par des axes 6.10. La contre-flèche 4 et la portion de liaison 6.2 sont ici reliées mécaniquement par encastrement, donc solidaires et sans degré de mobilité entre elles.  In the example of the figures, the securing portion 6.1 is configured to be secured by fitting to the top 105 of the mast 104. For this purpose, the securing portion 6.1 is here secured to the top 105 of the mast 104 by pins 6.10. The against-arrow 4 and the connecting portion 6.2 are here mechanically connected by embedding, so integral and without degree of mobility between them.
La portion de liaison 6.2 est agencée entre le pied de flèche 2 et la contre-flèche 4. La portion de liaison 6.2 relie, ici directement, le pied de flèche 2 à la contre-flèche 4. Le pied de flèche 2 et la contre-flèche 4 sont donc reliés mécaniquement par l'intermédiaire de la portion de liaison 6.2.  The connecting portion 6.2 is arranged between the jib 2 and the counter-jib 4. The connecting portion 6.2 connects, here directly, the jib 2 to the counter-jib 4. The jib 2 and the against -flèche 4 are mechanically connected via the connecting portion 6.2.
La partie de solidarisation 6 comprend ici des membrures 6.0 assemblées de façon à former un ensemble indéformable. Les membrures 6.0 sont ici assemblées de manière démontable. Comme la partie de solidarisation 6 supporte la flèche 102 lorsque la grue à flèche relevable 1 00 est en service, la partie de solidarisation 6 est parfois dénommée « porte- flèche ».  The securing part 6 here comprises chords 6.0 assembled so as to form an indeformable assembly. The chords 6.0 are here assembled removably. As the securing portion 6 supports the boom 102 when the luffing jib crane 1 00 is in use, the securing portion 6 is sometimes referred to as "boom".
La partie de solidarisation 6 a une section globalement triangulaire dans un plan vertical incluant l'axe sensiblement vertical Z autour duquel la flèche 102 tourne lorsque la grue à flèche relevable 100 est en service. La partie de solidarisation 6 a ici une forme prismatique à base triangulaire, comme le montre la figure 2.  The securing part 6 has a generally triangular section in a vertical plane including the substantially vertical axis Z around which the arrow 102 rotates when the luffing jib crane 100 is in use. The securing part 6 here has a prismatic shape with a triangular base, as shown in FIG. 2.
Le vérin 8 comprend une première partie de vérin 8.1 et une deuxième partie de vérin 8.2.  The cylinder 8 comprises a first cylinder part 8.1 and a second cylinder part 8.2.
La première partie de vérin 8.1 est reliée mécaniquement au pied de flèche 2 de sorte que le pied de flèche 2 est mobile entre la position abaissée et la position relevée. Lorsque la grue à flèche relevable 100 est en service, le vérin 8 permet de relever ou d'abaisser la flèche 102, par l'intermédiaire du pied de flèche 2. Dans l'exemple des figures, la première partie de vérin 8.1 est située à l'extrémité distale du vérin 8. La première partie de vérin 8.1 est reliée mécaniquement au pied de flèche 2 par une liaison pivot autour d'un axe de pivotement Y8.1 visible aux figures 5 et 6. The first part of cylinder 8.1 is mechanically connected to the foot of the boom 2 so that the boom foot 2 is movable between the position lowered and the position raised. When the luffing jib crane 100 is in use, the jack 8 makes it possible to raise or lower the jib 102, by means of the jib foot 2. In the example of the figures, the first jack portion 8.1 is located at the distal end of the cylinder 8. The first cylinder part 8.1 is mechanically connected to the jib 2 by a pivot connection about a pivot axis Y8.1 visible in FIGS. 5 and 6.
La deuxième partie de vérin 8.2 est reliée mécaniquement à la portion de liaison 6.2. Dans l'exemple des figures, la deuxième partie de vérin 8.2 est située sur à l'extrémité proximale du vérin 8. La deuxième partie de vérin 8.2 est reliée mécaniquement à la portion de liaison 6.2 par une liaison pivot autour d'un axe de pivotement Y8.2 visible aux figures 5 et 6.  The second cylinder portion 8.2 is mechanically connected to the connecting portion 6.2. In the example of the figures, the second cylinder portion 8.2 is located on the proximal end of the cylinder 8. The second cylinder portion 8.2 is mechanically connected to the connecting portion 6.2 by a pivot connection about a pin axis. pivot Y8.2 visible in Figures 5 and 6.
Le vérin 8 est ici un vérin linéaire hydraulique, qui est configuré pour passer d'une position rentrée, dans laquelle le pied de flèche 2 est en position abaissée, à une position déployée, dans laquelle le pied de flèche 2 est en position relevée.  The jack 8 is here a hydraulic linear cylinder, which is configured to move from a retracted position, in which the jib foot 2 is in the lowered position, to an extended position, in which the jib foot 2 is in the raised position.
La première partie de vérin 8.1 et la deuxième partie de vérin 8.2 sont équipées chacune d'une rotule d'articulation. La première partie de vérin 8.1 est reliée mécaniquement au pied de flèche 2, par sa rotule d'articulation, non seulement dans la configuration de service mais aussi dans la configuration de transport. De même, la deuxième partie de vérin 8.2 est reliée mécaniquement, par sa rotule d'articulation, à la portion de liaison 6.2 non seulement dans la configuration de service mais aussi dans la configuration de transport.  The first cylinder part 8.1 and the second cylinder part 8.2 are each equipped with a hinge ball joint. The first part of cylinder 8.1 is mechanically connected to the foot of the boom 2, by its hinge joint, not only in the service configuration but also in the transport configuration. Similarly, the second cylinder portion 8.2 is mechanically connected, by its hinge joint, to the connecting portion 6.2 not only in the service configuration but also in the transport configuration.
L'unité de relevage 1 comprend en outre un dispositif d'alimentation 10 qui est configuré pour alimenter en énergie le vérin 8 de façon à relever le pied de flèche 2. Le dispositif d'alimentation 10 est ici une centrale hydraulique configurée pour alimenter le vérin 8 en énergie hydraulique. Lorsqu'il est alimenté en énergie, le vérin 8 peut relever le pied de flèche 2. Le dispositif d'alimentation 1 0 est ici situé relativement près du vérin 8, à l'opposé de l'emplacement prévu pour le lest 5.  The lifting unit 1 further comprises a feeding device 10 which is configured to supply energy to the jack 8 so as to raise the jib foot 2. The feed device 10 is here a hydraulic unit configured to feed the jib. cylinder 8 in hydraulic energy. When powered, the jack 8 can raise the jib foot 2. The feed device 1 0 is here relatively close to the jack 8, opposite to the location provided for the ballast 5.
Le dispositif d'alimentation 10 est fixé à la contre-flèche 4. Le dispositif d'alimentation 10 peut ainsi être transporté avec la contre-flèche 4 lorsque l'unité de relevage 1 est en configuration de transport. Le dispositif d'alimentation 10 peut rester fixé à la contre-flèche 4. Le vérin 8 est un vérin linéaire configuré pour passer : The feeder 10 is attached to the counter-boom 4. The feeder 10 can thus be transported with the counter-boom 4 when the lifting unit 1 is in the transport configuration. The feeder 10 can remain attached to the counter-boom 4. The jack 8 is a linear jack configured to pass:
d'une position rentrée (figures 2, 5 et 6), dans laquelle le pied de flèche 2 est en position abaissée ; le vérin 8 est en position rentrée lorsque l'unité de relevage 1 est en configuration de transport ;  a retracted position (Figures 2, 5 and 6), wherein the jib foot 2 is in the lowered position; the jack 8 is in the retracted position when the lifting unit 1 is in the transport configuration;
- à une position déployée, dans laquelle le pied de flèche 2 est en position relevée. in an extended position, in which the jib foot 2 is in the raised position.
Le vérin 8 s'étend entre le pied de flèche 2 et la contre-flèche 4. Le vérin 8 est situé globalement entre une région distale du pied de flèche 2 et la partie de solidarisation 6. Le vérin 8 est ici totalement situé dans un volume délimité d'une part par le pied de flèche 2 et d'autre part par la contre- flèche 4.  The jack 8 extends between the jib foot 2 and the counter-jib 4. The jack 8 is located generally between a region distal of the jib 2 and the securing portion 6. The jack 8 is here completely located in a volume defined on the one hand by the foot of arrow 2 and on the other by the counter-arrow 4.
Lorsque le vérin 8 est en position rentrée, la direction de vérin X8 forme ici un angle A8 environ égal à -20 degrés avec la direction horizontale X, comme le montrent les figures 1 et 8. Le vérin 8 est en position rentrée lorsque l'unité de relevage 1 est en configuration de transport. Le vérin 8 est aussi en position rentrée lorsque l'unité de relevage 1 est en phases de manipulation, de stockage, de montage, de démontage, de maintenance. Le vérin 8 peut aussi être en position rentrée lorsque l'unité de relevage 1 est en configuration de service avec le pied de flèche 2 en position abaissée.  When the cylinder 8 is in the retracted position, the cylinder direction X8 here forms an angle A8 approximately equal to -20 degrees with the horizontal direction X, as shown in Figures 1 and 8. The cylinder 8 is in the retracted position when the lifting unit 1 is in transport configuration. The cylinder 8 is also in the retracted position when the lifting unit 1 is in handling, storage, assembly, disassembly and maintenance phases. The cylinder 8 can also be in the retracted position when the lifting unit 1 is in the service configuration with the jib foot 2 in the lowered position.
L'unité de relevage 1 comprend en outre des conduits 12 pour conduire le liquide entre le dispositif d'alimentation 10 et le vérin 8. De plus, l'unité de relevage 1 comprend des raccords rapides 14 agencés entre le vérin 8 et le dispositif d'alimentation 10. Les raccords rapides 14 sont situés plus près du dispositif d'alimentation 10 que du vérin 8. Les raccords rapides 14 peuvent être placés dans la région de jonction 4.6 entre la contre-flèche 4 et la partie de solidarisation 6.  The lifting unit 1 further comprises ducts 12 for conducting the liquid between the supply device 10 and the cylinder 8. In addition, the lifting unit 1 comprises quick couplers 14 arranged between the jack 8 and the device The quick couplers 14 are located closer to the supply device 10 than the cylinder 8. The quick couplers 14 can be placed in the junction region 4.6 between the counter-jib 4 and the securing part 6.
Le pied de flèche 2 comprend une partie haute 2.1 et une partie basse 2.2. La partie haute 2.1 est située au-dessus de la partie basse 2.2 lorsque l'unité de relevage 1 est en configuration de service avec le pied de flèche 2 abaissé (figures 5 et 6).  The boom foot 2 comprises an upper part 2.1 and a lower part 2.2. The upper part 2.1 is located above the lower part 2.2 when the lifting unit 1 is in service configuration with the foot of the boom 2 lowered (Figures 5 and 6).
L'unité de relevage 1 comprend en outre un axe de pivotement Y2.4. L'axe de pivotement Y2.4 est agencé entre le pied de flèche 2 et la contre-flèche. Ainsi, l'axe de pivotement Y2.4 est situé plus haut que la partie basse 2.2 lorsque l'unité de relevage 1 est en configuration de service avec le pied de flèche 2 abaissé (figures 5 et 6). L'axe de pivotement Y2.4 est ici situé sensiblement à l'altitude de la partie haute 2.1 lorsque l'unité de relevage 1 est en configuration de service avec le pied de flèche 2 abaissé. The lifting unit 1 further comprises a pivot axis Y2.4. The pivot axis Y2.4 is arranged between the foot of the arrow 2 and the counter-arrow. Thus, the pivot axis Y2.4 is located higher than the lower part 2.2 when the lifting unit 1 is in service configuration with the foot of arrow 2 lowered (Figures 5 and 6). The pivot axis Y2.4 is here substantially at the altitude of the upper part 2.1 when the lifting unit 1 is in the service configuration with the foot of the boom 2 lowered.
La partie haute 2.1 est fixée à l'axe de pivotement Y2.4 et la partie basse 2.2 est fixée à la première partie de vérin 8.1 . Le vérin 8 peut ainsi pousser la flèche 2 suivant un axe d'extension s'étendant sensiblement dans le prolongement des membrures inférieures 102.0 de la flèche 102 lorsque l'unité de relevage 1 est en configuration de service avec le pied de flèche 2 abaissé (figures 5 et 6). Cet axe d'extension correspond ici à la direction horizontale X représentée à la figure 1 .  The upper part 2.1 is fixed to the pivot axis Y2.4 and the lower part 2.2 is fixed to the first cylinder part 8.1. The jack 8 can thus push the boom 2 along an axis of extension extending substantially in the extension of the lower chords 102.0 of the boom 102 when the lifting unit 1 is in the service configuration with the foot of the boom 2 lowered ( Figures 5 and 6). This extension axis corresponds here to the horizontal direction X shown in FIG.
Lorsque la grue à flèche relevable 100 est en service, avec l'unité de relevage 1 est en service, le pied de flèche 2 forme la partie proximale de la flèche 102. À cet effet, le pied de flèche 2 comporte l'axe de pivotement Y2.4, autour duquel le vérin 8 relève ou abaisse la flèche 102. Le pied de flèche 2 est mobile entre une position abaissée (figures 5, 6, 8 et 9) et une position relevée lorsque l'unité de relevage 1 est en service.  When the luffing jib crane 100 is in use, with the luffing unit 1 is in use, the jib foot 2 forms the proximal portion of the jib 102. For this purpose, the jib foot 2 includes the jib axis. pivoting Y2.4, around which the cylinder 8 raises or lowers the boom 102. The boom foot 2 is movable between a lowered position (Figures 5, 6, 8 and 9) and a raised position when the lifting unit 1 is in use.
L'axe de pivotement Y2.4 est mécaniquement relié à la partie de solidarisation 6 non seulement dans la configuration de service mais aussi dans la configuration de transport. L'axe de pivotement Y2.4 est muni de rotules d'articulation.  The pivot axis Y2.4 is mechanically connected to the securing part 6 not only in the service configuration but also in the transport configuration. The pivot axis Y2.4 is provided with articulation ball joints.
L'unité de relevage 1 peut être transportée comme un bloc unitaire conservant tous ses composants reliés entre eux. Les éléments de liaison du pied de flèche 2, de la contre-flèche 4, de la partie de solidarisation 6 et du vérin 8 peuvent rester reliés (mécaniquement, hydrauliquement et/ou électriquement) en permanence.  The lifting unit 1 can be transported as a unitary block retaining all its interconnected components. The connecting elements of the jib foot 2, the counter-jib 4, the securing part 6 and the cylinder 8 can remain connected (mechanically, hydraulically and / or electrically) permanently.
De plus, l'unité de relevage 1 comprend ici un dispositif de rotation 16 qui est configuré pour faire tourner l'unité de relevage 1 et la flèche relevable 102 par rapport au mât 104 et autour de l'axe sensiblement vertical Z lorsque la grue à flèche relevable 100 est en service. Le dispositif de rotation 16 est usuellement dénommé couronne d'orientation .  In addition, the lifting unit 1 here comprises a rotation device 16 which is configured to rotate the lifting unit 1 and the lifting boom 102 relative to the mast 104 and around the substantially vertical axis Z when the crane with luffing arrow 100 is in use. The rotation device 16 is usually called the orientation ring.
Comme le montrent les figures 8 et 9, quand la portion de solidarisation 6.1 est solidarisée au mât 104, la partie de solidarisation 6 permet de soutenir la contre-flèche 4 d'un côté et de soutenir le pied de flèche 2, donc toute la flèche 102, de l'autre côté. Lorsque l'unité de relevage 1 est en configuration de service, la contre-flèche 4 est agencée à l'opposé du pied de flèche 2 par rapport au mât 104. As shown in FIGS. 8 and 9, when the fastening portion 6.1 is secured to the mast 104, the fastening portion 6 makes it possible to support the counter-jib 4 on one side and to support the jib 2, so the entire jib arrow 102, on the other side. When the lifting unit 1 is in the service configuration, the counter-jib 4 is arranged opposite the jib 2 with respect to the mast 104.
L'unité de relevage 1 comprend en outre un treuil de levage destiné à lever une charge suspendue à la flèche 102.  The lifting unit 1 further comprises a hoisting winch for lifting a load suspended from the boom 102.
La figure 9 illustre un procédé d'assemblage 200 conforme à l'invention. Le procédé d'assemblage 200 comprend notamment les étapes :  Figure 9 illustrates an assembly method 200 according to the invention. The assembly method 200 comprises in particular the steps:
202) dresser le mât 104,  202) erect the mast 104,
203) fixer sur le mât 104 le dispositif de rotation 16,  203) fix on the mast 104 the rotation device 16,
204) assembler les autres composants de l'unité de relevage 1 sur le dispositif de rotation 1 6,  204) assembling the other components of the lifting unit 1 on the rotation device 1 6,
205) relier mécaniquement la flèche 102 au pied de flèche 2, et  205) mechanically connect the arrow 102 to the foot of the arrow 2, and
En outre, le procédé d'assemblage 200 comprend ici une étape 206 consistant à équilibrer la grue à flèche relevable 1 00 en plaçant du lest 5 sur la contre-flèche 4.  In addition, the assembly method 200 here comprises a step 206 consisting in balancing the luffing jib crane 1 00 by placing ballast 5 on the counter-jib 4.
De plus, le procédé d'assemblage 200 comprend une étape 207 consistant à régler des sécurités. Après cette étape de réglage 207, le vérin 8 peut pousser le pied de flèche 2, donc relever la flèche 102.  In addition, the assembly method 200 includes a step 207 of setting security. After this adjustment step 207, the jack 8 can push the jib foot 2, thus raising the jib 102.
Bien entendu, la présente invention n'est pas limitée aux modes de réalisation particuliers décrits dans la présente demande de brevet, ni à des modes de réalisation à la portée de l'homme du métier. D'autres modes de réalisation peuvent être envisagés sans sortir du cadre de l'invention, à partir de tout élément équivalent à un élément indiqué dans la présente demande de brevet.  Of course, the present invention is not limited to the particular embodiments described in the present patent application, nor to embodiments within the scope of those skilled in the art. Other embodiments may be envisaged without departing from the scope of the invention, from any element equivalent to an element indicated in the present patent application.

Claims

REVENDICATIONS
1 . Unité de relevage (1 ), pour composer une grue à flèche relevable (100), l'unité de relevage (1 ) comprenant au moins : 1. Lifting unit (1) for composing a luffing jib crane (100), the lifting unit (1) comprising at least:
- un pied de flèche (2) destiné à former la partie proximale d'une flèche (102) appartenant à la grue à flèche relevable (100) lorsque l'unité de relevage (1 ) est en configuration de service, an arrow foot (2) intended to form the proximal portion of an arrow (102) belonging to the luffing jib crane (100) when the lifting unit (1) is in the service configuration,
une contre-flèche (4) configurée pour supporter un lest (5) destiné à équilibrer la flèche (102),  a counter-boom (4) configured to support a ballast (5) for balancing the boom (102),
- une partie de solidarisation (6) agencée entre le pied de flèche (2) et la contre-flèche (4), la partie de solidarisation (6) comprenant une portion de solidarisation (6.1 ) configurée pour solidariser l'unité de relevage (1 ) à un mât (104) de la grue à flèche relevable (100), et - a securing portion (6) arranged between the jib foot (2) and the counter-jib (4), the securing portion (6) comprising a securing portion (6.1) configured to secure the lifting unit ( 1) to a mast (104) of the luffing jib crane (100), and
un vérin (8) comprenant une première partie de vérin (8.1 ) et une deuxième partie de vérin (8.2), la première partie de vérin (8.1 ) étant reliée mécaniquement au pied de flèche (2) de sorte que le pied de flèche (2) est mobile au moins entre une position abaissée et une position relevée,  a jack (8) comprising a first cylinder part (8.1) and a second cylinder part (8.2), the first cylinder part (8.1) being mechanically connected to the jib foot (2) so that the jib foot ( 2) is movable at least between a lowered position and a raised position,
l'unité de relevage (1 ) étant configurée pour être placée au moins :  the lifting unit (1) being configured to be placed at least:
- dans une configuration de service, dans laquelle le vérin (8) peut déplacer le pied de flèche (2) entre la position abaissée et la position relevée, et in a service configuration, in which the jack (8) can move the jib foot (2) between the lowered position and the raised position, and
dans une configuration de transport, dans laquelle le pied de flèche (2) est en position abaissée,  in a transport configuration, in which the jib foot (2) is in the lowered position,
l'unité de relevage (1 ) étant caractérisée en ce que la deuxième partie de vérin (8.2) est reliée mécaniquement à la partie de solidarisation (6).  the lifting unit (1) being characterized in that the second cylinder part (8.2) is mechanically connected to the securing part (6).
2. Unité de relevage (1 ) selon la revendication précédente, dans laquelle la partie de solidarisation (6) comprend en outre une portion de liaison (6.2) qui est configurée pour relier mécaniquement le pied de flèche (2) à la contre-flèche (4). 2. lifting unit (1) according to the preceding claim, wherein the securing portion (6) further comprises a connecting portion (6.2) which is configured to mechanically connect the foot of arrow (2) to the against-arrow (4).
3. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, dans laquelle la première partie de vérin (8.1 ) et la deuxième partie de vérin (8.2) sont équipées chacune d'une rotule d'articulation, et dans laquelle la première partie de vérin (8.1 ) et la deuxième partie de vérin (8.2) sont mécaniquement reliées respectivement au pied de flèche (2) et à la partie de solidarisation (6) non seulement dans la configuration de service mais aussi dans la configuration de transport. 3. lifting unit (1) according to any one of the preceding claims, wherein the first cylinder part (8.1) and the second cylinder part (8.2) are each equipped with a hinge joint, and wherein the first part of cylinder (8.1) and the second part of cylinder (8.2) are mechanically connected respectively to the boom foot (2) and to the securing part (6) not only in the service configuration but also in the transport configuration.
4. Unité de relevage (1 ) selon la revendication précédente, dans laquelle le vérin (8) est situé globalement entre une région distale du pied de flèche (2) et la partie de solidarisation (6). 4. lifting unit (1) according to the preceding claim, wherein the cylinder (8) is located generally between a distal region of the foot of the boom (2) and the securing portion (6).
5. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, dans laquelle le vérin (8) est un vérin linéaire configuré pour passer d'une position rentrée, dans laquelle le pied de flèche (2) est en position abaissée, à une position déployée, dans laquelle le pied de flèche (2) est en position relevée, le vérin (8) en position rentrée s'étendant selon une direction de vérin (X8) qui forme un angle (A8) compris entre -30 degrés et + 30 degrés avec une direction horizontale (X) lorsque l'unité de relevage (1 ) est en configuration de transport. 5. lifting unit (1) according to any one of the preceding claims, wherein the cylinder (8) is a linear cylinder configured to move from a retracted position, wherein the jib foot (2) is in the lowered position at an extended position, in which the jib foot (2) is in the raised position, the jack (8) in the retracted position extending in a cylinder direction (X8) which forms an angle (A8) of between -30 degrees and + 30 degrees with a horizontal direction (X) when the lifting unit (1) is in the transport configuration.
6. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, dans laquelle le vérin (8) est configuré pour être en position rentrée lorsque l'unité de relevage (1 ) est en configuration de transport. 6. lifting unit (1) according to any one of the preceding claims, wherein the cylinder (8) is configured to be in the retracted position when the lifting unit (1) is in the transport configuration.
7. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, dans laquelle le pied de flèche (2) comprend une partie haute (2.1 ) et une partie basse (2.2), la partie haute (2.1 ) étant située au-dessus de la partie basse (2.2) lorsque l'unité de relevage (1 ) est en configuration de service avec le pied de flèche (2) en position abaissée, Lifting unit (1) according to any one of the preceding claims, wherein the jib foot (2) comprises an upper part (2.1) and a lower part (2.2), the upper part (2.1) being located at above the lower part (2.2) when the lifting unit (1) is in service configuration with the jib foot (2) in the lowered position,
l'unité de relevage (1 ) comprenant en outre un axe de pivotement the lifting unit (1) further comprising a pivot axis
(Y2.4) agencé entre le pied de flèche (2) et la contre-flèche (4) de sorte que l'axe de pivotement (Y2.4) est situé plus haut que la partie basse (2.2) lorsque l'unité de relevage (1 ) est en configuration de service avec le pied de flèche (2) en position abaissée, (Y2.4) arranged between the jib foot (2) and the counter-jib (4) so that the pivot axis (Y2.4) is located higher than the lower part (2.2) when the unit lifting gear (1) is in the service configuration with the boom foot (2) in the lowered position,
la partie haute (2.1 ) étant fixée à l'axe de pivotement (Y2.4) et la partie basse (2.2) étant fixée à la première partie de vérin (8.1 ), de sorte que le vérin (8) peut pousser la flèche (2) suivant un axe s'étendant sensiblement dans le prolongement des membrures inférieures de la flèche (2) lorsque l'unité de relevage (1 ) est en configuration de service avec le pied de flèche (2) abaissé. the upper part (2.1) being fixed to the pivot axis (Y2.4) and the lower part (2.2) being fixed to the first cylinder part (8.1), so that the cylinder (8) can push the boom (2) along an axis extending substantially in the extension of the lower chords of the boom (2) when the lifting unit (1) is in the service configuration with the boom foot (2) lowered.
8. Unité de relevage (1 ) selon la revendication précédente, dans laquelle l'axe de pivotement (Y2.4) est mécaniquement relié à la partie de solidarisation (6) non seulement dans la configuration de service mais aussi dans la configuration de transport. 8. lifting unit (1) according to the preceding claim, wherein the pivot axis (Y2.4) is mechanically connected to the securing part (6) not only in the service configuration but also in the transport configuration .
9. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, comprenant en outre un dispositif d'alimentation9. lifting unit (1) according to any one of the preceding claims, further comprising a feeding device
(10) configuré pour alimenter en énergie le vérin (8) de façon à relever le pied de flèche (2), le dispositif d'alimentation (10) étant fixé à la contre-flèche (4) de sorte que le dispositif d'alimentation (10) peut être transporté avec la contre-flèche (4) lorsque l'unité de relevage (1 ) est en configuration de transport. (10) configured to energize the ram (8) to raise the jib foot (2), the feed device (10) being attached to the jib (4) so that the jib supply (10) can be transported with the counter-boom (4) when the lifting unit (1) is in transport configuration.
10. Unité de relevage (1 ) selon la revendication précédente, dans laquelle le vérin (8) est un vérin linéaire hydraulique, et le dispositif d'alimentation (10) est une centrale hydraulique. 10. Lift unit (1) according to the preceding claim, wherein the cylinder (8) is a hydraulic linear cylinder, and the feed device (10) is a hydraulic unit.
1 1 . Unité de relevage (1 ) selon la revendication précédente, comprenant en outre : 1 1. Lifting unit (1) according to the preceding claim, further comprising:
des conduits (12) pour conduire le liquide entre le dispositif d'alimentation (1 0) et le vérin (8), et  ducts (12) for conducting the liquid between the supply device (1 0) and the cylinder (8), and
- des raccords rapides (14) agencés entre le vérin (8) et le dispositif d'alimentation (1 0), les raccords rapides (14) étant situés plus près du dispositif d'alimentation (1 0) que du vérin (8). - quick couplings (14) arranged between the cylinder (8) and the supply device (1 0), the quick couplings (14) being situated closer to the supply device (1 0) than to the cylinder (8) .
12. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, ayant une longueur maximale (L1 ) inférieure à12. A lifting unit (1) according to any one of the preceding claims, having a maximum length (L1) less than
12 m, une largeur maximale (W1 ) inférieure à 2,25 m et une hauteur maximale (H 1 ) inférieure à 2,5 m. 12 m, maximum width (W1) less than 2.25 m and maximum height (H 1) less than 2.5 m.
13. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, dans laquelle la partie de solidarisation (6) comprend des membrures (6.0) assemblées de façon à former un ensemble indéformable. 13. lifting unit (1) according to any one of the preceding claims, wherein the securing portion (6) comprises chords (6.0) assembled to form an indeformable assembly.
14. Unité de relevage (1 ) selon l'une quelconque des revendications précédentes, dans laquelle la contre-flèche (4) et la partie de solidarisation (6) sont reliées mécaniquement par encastrement. 14. lifting unit (1) according to any preceding claim, wherein the against-arrow (4) and the securing portion (6) are mechanically connected by embedding.
15. Grue à flèche relevable (100) comprenant : A luffing jib crane (100) comprising:
une flèche (102) configurée pour distribuer une charge suspendue, - un mât (104) configuré pour supporter la flèche et la charge suspendue, et  an arrow (102) configured to dispense a suspended load, - a mast (104) configured to support the boom and the suspended load, and
une unité de relevage (1 ) selon l'une quelconque des revendications précédentes, l'unité de relevage (1 ) étant reliée mécaniquement au mât (1 04) et solidarisée à la flèche (102).  a lifting unit (1) according to any one of the preceding claims, the lifting unit (1) being mechanically connected to the mast (1 04) and secured to the boom (102).
16. Procédé d'assemblage (200) d'une grue à flèche relevable (100) selon la revendication précédente, comprenant les étapes : 16. A method of assembling (200) a luffing jib crane (100) according to the preceding claim, comprising the steps of:
(202) dresser le mât (104),  (202) raising the mast (104),
(203) fixer sur le mât (104) un dispositif de rotation (1 6) appartenant à l'unité de relevage (1 ),  (203) fixing on the mast (104) a rotation device (1 6) belonging to the lifting unit (1),
(204) assembler l'unité de relevage (1 ) sur le dispositif de rotation (16), (204) assembling the lifting unit (1) on the rotation device (16),
(205) relier mécaniquement la flèche (102) au pied de flèche (2). (205) mechanically connecting the boom (102) to the boom foot (2).
EP16812997.1A 2015-12-23 2016-11-17 Hebeeinheit und kran mit einem anhebbarem ausleger mit einer solchen hebeeinheit Active EP3393962B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1563218A FR3046152B1 (en) 2015-12-23 2015-12-23 LIFTING UNIT, RECEIVABLE CRANE CRANE COMPRISING SUCH A LIFTING UNIT AND METHOD FOR ASSEMBLING SUCH CRANE
PCT/FR2016/052994 WO2017109309A1 (en) 2015-12-23 2016-11-17 Raising unit, crane with raisable jib comprising such a raising unit, and method for assembling such a crane

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EP3393962B1 EP3393962B1 (en) 2020-04-15

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FR3072085B1 (en) * 2017-10-09 2019-11-08 Manitowoc Crane Group France CRANE WITH ADJUSTABLE ARROW WITH LOCKING DEVICE OF THE ARROW IN CONFIGURATION RECEIVED
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JP6919858B2 (en) * 2018-03-16 2021-08-18 株式会社三井Ｅ＆Ｓマシナリー Trolley and trolley transportation method
FR3114581B1 (en) 2020-09-25 2022-12-09 Manitowoc Crane Group France Crane element forming a pivot for a component-mounted crane

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WO2017109309A1 (en) 2017-06-29
US20190010028A1 (en) 2019-01-10
KR20180097584A (en) 2018-08-31
KR102641160B1 (en) 2024-02-26
IL259963A (en) 2018-07-31
EP3393962B1 (en) 2020-04-15
JP2018538218A (en) 2018-12-27
CN108473289A (en) 2018-08-31
FR3046152B1 (en) 2017-12-29
US10752474B2 (en) 2020-08-25
AU2016378835A1 (en) 2018-07-12
AU2016378835B2 (en) 2021-08-26
CN108473289B (en) 2020-03-03
FR3046152A1 (en) 2017-06-30

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