EP4091980B1 - Système et procédé de levage pour une grue - Google Patents

Système et procédé de levage pour une grue Download PDF

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Publication number
EP4091980B1
EP4091980B1 EP22171744.0A EP22171744A EP4091980B1 EP 4091980 B1 EP4091980 B1 EP 4091980B1 EP 22171744 A EP22171744 A EP 22171744A EP 4091980 B1 EP4091980 B1 EP 4091980B1
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EP
European Patent Office
Prior art keywords
hook block
crane
winch
auxiliary
suspension element
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.)
Active
Application number
EP22171744.0A
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German (de)
English (en)
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EP4091980A1 (fr
Inventor
Ulrich Wiedemann
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.)
Liebherr Werk Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen GmbH
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Publication of EP4091980A1 publication Critical patent/EP4091980A1/fr
Application granted granted Critical
Publication of EP4091980B1 publication Critical patent/EP4091980B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/26—Other details, e.g. housings
    • 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
    • B66C2700/0321—Travelling cranes
    • B66C2700/0357—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks
    • B66C2700/0364—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm
    • B66C2700/0371—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm on a turntable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/01—Winches, capstans or pivots
    • B66D2700/0108—Winches, capstans or pivots with devices for paying out or automatically tightening the cable

Definitions

  • the present invention relates to a lifting system for a crane, in particular a mobile or crawler crane, for generating a hoist rope pretension during a lift of a suspension element of the crane, a crane with such a lifting system, a pretensioning hook block and a method for lifting a suspension element of a crane using a such a lifting system.
  • the simplest approach is currently to increase the weight of the hook block, for example by using a larger load hook and/or with additional weights.
  • the reeving of the hook block can be kept as low as possible and parallel operation with two winches can be used.
  • the US 2010/072158 A1 which is considered to be the closest prior art, discloses a crawler crane with a generic lifting system.
  • the EP 2 402 281 A1 discloses a tower crane, the hoist rope of which is guided over an auxiliary deflection in order to unwind the hoist rope area that is not unwound during normal operation and to rewind it under pretension.
  • the US 4,081,081 A discloses a crawler crane with a boom that can be removed from the superstructure and guy stands, which can be moved into a folded position on the superstructure after the boom has been dismantled.
  • the present invention is therefore based on the object of ensuring good winding quality when winding the hoist rope onto the hoist winch of a crane, without the need to use additional auxiliary vehicles or the need to place a weight at a great height.
  • a lifting system for a crane in particular a mobile or crawler crane, is proposed for generating a hoist cable pretension during a hoist of a suspension element of the crane.
  • the lifting system according to the invention comprises a divisible pre-tensioning hook block and an auxiliary rope connected to it, which is mounted so that it can be wound up and unwound on an auxiliary winch arranged or mountable on the crane and is guided via a deflection device arranged or mountable on a boom of the crane.
  • the pretensioning hook block By winding and unwinding the auxiliary rope, the pre-tensioning hook block can be raised and lowered relative to the deflection device.
  • the pretensioning hook block comprises two hook block parts that can be releasably locked or locked together and are connected to one another via the auxiliary rope, of which an upper hook block part has a fastening means for fastening to the suspension element of the crane and a lower hook block part has a receiving means for fastening or receiving a weight.
  • the upper hook block part is connected to the suspension element, it can be raised and lowered together with it.
  • the lower hook block part is connected to a weight in order to use this additional weight to exert a pretensioning force on the hoist rope of the crane, which carries the suspension element, and thereby ensure good winding quality on the corresponding hoist winch.
  • the two hook block parts can be moved in particular independently of one another and the weight associated with the lower hook block part does not have to be lifted together with the suspension element when it is lifted.
  • the position or movement of the weight connected to the lower hook block part can be controlled precisely and safely, for example via a crane control of the crane.
  • the two hook block parts are connected to one another via the auxiliary rope, they can be moved apart or brought together by appropriately controlling the auxiliary winch. For example, after lifting the suspension element to a desired height by appropriately controlling the auxiliary winch, the weight connected to the lower hook block part can be placed back on the ground and detached from the lower hook block part, so that the latter can then be raised again by winding up the auxiliary rope and connected to the upper hook block part can be brought together and locked if necessary. Since the pre-tensioning hook bottle "hangs" on the separate auxiliary rope, the pre-tensioning hook bottle can be detached from the suspension element in the elevated position, so that the latter is available to hold a part to be dismantled.
  • the lifting system according to the invention therefore makes it possible to exert a pre-tensioning force on the lifting rope by using an additional weight when lifting the "empty" suspension element and thus guarantee good winding quality, whereby no external auxiliary devices or vehicles need to be used other than the weight.
  • the weight that generates the preload force does not have to be in an elevated position but can remain on the floor. This provides a flexible and easy-to-use system that can be used in dismantling operations to ensure good hoist rope winding quality and includes few additional parts to be carried.
  • the load can be kept close to the ground. This is an improvement in security aspects. There are always dangers in the area under a suspended load and people should avoid the area.
  • auxiliary winch or hoisting winch is wound up or unwound or spooled up or unwound
  • this is intended to express in a shortened notation that the corresponding auxiliary rope or hoisting rope is wound up or unwound on or from the winch . is wound up or unwound.
  • the feature that the upper and lower hook block parts are connected to one another via the auxiliary rope is to be interpreted broadly and is to be understood as meaning that the auxiliary rope runs between these two hook block parts.
  • the two hook block parts are movable in particular relative to one another.
  • At least a first deflection roller is arranged on the upper hook block part and a second deflection roller on the lower hook block part, over which the auxiliary rope is guided.
  • the pre-tensioning hook block has at least two reevings for the auxiliary rope.
  • the reeving of the auxiliary rope can be carried out in such a way that its end is attached to the lower hook block part. Together with a deflection roller provided on the deflection device, this results in a total of three strands in the simplest case that the lower and upper hook block part each have exactly one deflection roller, with the first strand of the auxiliary rope between the deflection device and the lower hook block part, the second strand between the lower hook block part and upper hook block part and the third strand runs from the upper hook block part for attachment to the lower hook block part.
  • the mass of the attached weight is distributed proportionally across the various strands of the pulley. In the case of three strands, two strands contribute to increasing the pre-tension, so that approx. 2/3 of the weight hangs on the suspension element and tensions the hoist rope, which is wound onto the hoist winch.
  • the pre-tensioning hook block has at least one deflection roller for guiding the auxiliary rope laterally past the suspension means, which is preferably arranged on the upper hook block part.
  • This additional deflection roller is therefore not used to reeve the auxiliary rope in order to distribute the weight of the additional weight, but rather merely to guide the auxiliary rope past.
  • one of the deflection rollers of the pulley is used at the same time to guide it past.
  • the pretensioning hook block comprises a guide mechanism by means of which the lower and upper hook block parts can be brought into a defined locking position when brought together.
  • the guide mechanism can serve to precisely align the upper and lower hook block parts and/or enable easier insertion of the two hook block parts into one another.
  • the guide mechanism comprises one or more guide rails.
  • the guide mechanism may comprise a tongue and groove mechanism, wherein the groove may be attached to the lower hook block and the tongue may be attached to the upper hook block.
  • the reverse case is also possible.
  • the guide mechanism is preferably designed in such a way that the hook block parts are brought together automatically in an elevated position without the need for manual assistance.
  • the lower and upper hook block parts have connecting means for releasably locking them together.
  • the connecting means preferably enable the lower and upper hook block parts to be bolted together using one or more bolts.
  • the lower and upper hook block parts can be locked by means of an actuatable locking mechanism, the locking mechanism preferably being able to be actuated actively or passively during or after the upper and lower hook block parts have been brought together.
  • Active actuation can take place, for example, using electrically or hydraulically controlled locking bolts.
  • passive actuation of the locking mechanism is preferred, in particular triggered when the upper and lower hook block parts are brought together. This means that the prestressing hook block can be designed to be structurally simple.
  • the locking mechanism is designed when merging the lower and upper To automatically lock hook block parts and preferably comprises a spring element and / or a snap mechanism.
  • the snap mechanism can, for example, comprise a pivotable hook element which is arranged on the upper or lower hook bottle part in such a way that when the other hook bottle part is brought together, the hook element pivots and the latter snaps back into a locking position of the upper and lower hook element by a spring mechanism and a bolt on the other hook bottle part in this way encompasses that the two hook block parts are locked together.
  • the hook element and bolt other elements can be used, for example a sliding latch.
  • the automatic locking when the hook block parts are brought together means that there is no need for manual bolting when bringing them together, which significantly simplifies the lifting process. It is also conceivable that manual bolting takes place in addition to the automatically actuated locking mechanism.
  • a lifting winch is also provided, on which a lifting rope connected to the suspension means is mounted so that it can be wound up and unwound, the lifting winch and the auxiliary winch preferably being able to be actuated independently of one another and thereby the carrying means and the pretensioning hook block being able to be lifted independently of one another.
  • the lifting winch and the auxiliary winch can preferably be operated by a crane control.
  • a crane control is also provided, which is set up to control the lifting winch and the auxiliary winch in a synchronized manner in such a way that during a stroke of the suspension means by winding up the lifting winch and simultaneously unwinding the auxiliary winch, a weight attached to the unlocked pre-tensioning hook bottle is at a certain height is kept floating above the ground.
  • the height and/or orientation of the weight can be detected by appropriate sensors and the measured values can be included in the control system.
  • the entire prestressing process can be carried out and monitored by the crane control.
  • the pretensioning process can therefore correspond to a regular crane operation, for example a monitored two-hook operation, with a hook on the suspension element as the main lift, actuated by the lifting winch, and a hook on the pretensioning hook block, actuated by the auxiliary winch, with a common load.
  • the present invention further relates to a crane, in particular a mobile or crawler crane, which comprises the lifting system according to the invention.
  • a crane in particular a mobile or crawler crane, which comprises the lifting system according to the invention.
  • both the lifting winch and the auxiliary winch are attached to a superstructure of the crane and can be operated independently via a crane control.
  • the suspension means can be a hook block of the crane.
  • the deflection device can be a mast nose or folding jib that can be mounted on the boom tip, which preferably has at least one deflection roller over which the auxiliary rope is guided.
  • the present invention further relates to a pretensioning hook block of the lifting system according to the invention.
  • the pretensioning hook block includes an auxiliary rope fastening means for fastening the auxiliary rope of the lifting system, which is preferably arranged on the lower hook block part.
  • auxiliary rope fastening means for fastening the auxiliary rope of the lifting system, which is preferably arranged on the lower hook block part.
  • the first three steps can be performed in any order.
  • the lower hook block part is lifted by winding up the auxiliary winch and brought together with the upper hook block part, so that the hook block parts can be locked together, with the locked pre-tensioning hook block preferably then being released from the suspension means and is deposited on the ground by unwinding the auxiliary winch.
  • the suspension element can, for example, be connected to a part that is to be dismantled at a great height and the part can be lowered to the ground. The process can then be repeated so that sufficient pre-tensioning force is available for the hoist rope with each stroke of the "empty" suspension element.
  • Accessibility for hanging the pre-tensioning hook block from the suspension element can be assumed as given, since in the subsequent step the load to be dismantled must be attached to the suspension element.
  • the lifting winch and the auxiliary winch are controlled synchronously or in a synchronized manner, in particular via a crane control of the crane, that by winding up the lifting winch and simultaneously unwinding the auxiliary winch, the weight is at a certain level Height, in particular kept floating above the ground.
  • the lifting of the suspension means takes place in a two-hook operation monitored by the crane control, with the lifting and auxiliary winches preferably being automatically controlled by the crane control in such a way that the weight is in a defined manner height above the ground and/or in a certain position.
  • the Figure 1 shows a schematic side view of the pretensioning hook bottle 10 of the lifting system according to the invention according to a preferred exemplary embodiment.
  • the pretensioning hook block 10 is suspended on a suspension element 6 of a crane 1, the exemplary embodiments shown here being a crawler crane 1.
  • the crane 1, which is shown in an overall side view in the Figures 8-11 is shown, comprises an undercarriage 8 with a crawler chassis, an uppercarriage 3 rotatably mounted on the undercarriage 8 about a vertical axis, a boom 2 articulated about a horizontal axis on the superstructure 3 and a Suspension means 6 for lifting loads, which in the exemplary embodiments shown here is designed as a roller block 6a with a load hook 6b.
  • the uppercarriage 3 of the crane 1 is isolated in a side view in the Figure 7 shown.
  • a hoist winch 5 on which a hoist rope 4 is mounted so that it can be wound up and unwound.
  • the lifting rope 4 is connected to the suspension element 6, so that the suspension element 6 can be raised and lowered by operating the lifting winch 5 or by winding and unwinding the lifting rope 4.
  • the crane 1 also has an auxiliary winch 14, on which an auxiliary rope 12 is mounted so that it can be wound up and unwound.
  • the auxiliary winch 14 is located in the lower area of the boom 2.
  • the hoist rope 4 is guided to the hoist winch 5 via a deflection roller of a roller head at the boom tip.
  • a deflection device 16 designed as a mast nose is mounted on the boom tip and has a deflection roller over which the auxiliary rope 12 is guided.
  • FIG. 1 Reference is made to the biasing hook bottle 10 according to the invention in a locked state ( Fig. 1 ) or in an unlocked state ( Fig. 1-2 ) show.
  • the Figure 5 additionally shows side and front views of the pre-tensioning hook block 10.
  • the pretensioning hook block 10 is constructed in two parts and comprises an upper hook block part 20 (top block) and a lower hook block part 22 (bottom block).
  • the two hook block parts 20, 22 can be locked together so that the preload hook block 10 can be moved or lifted as a whole (see Fig. 1 ).
  • the locking can be done using one or more bolts 30.
  • the upper hook block part 20 has a first deflection roller 24, while the lower hook block part 22 includes a second deflection roller 26.
  • the auxiliary rope 12 guided over the mast nose 16 is guided or reeved starting from the mast nose 16 over the second deflection roller 26 of the lower hook block part 22 and then over the first deflection roller 24 of the upper hook block part 20 and connected to the lower hook block part 22 via a fastening means 29.
  • the upper hook block part 20 has a further deflection roller 28 in order to guide the auxiliary rope 12 laterally past the suspension element 6.
  • the two hook block parts 20, 22 are connected to one another via the auxiliary rope 12 in such a way that the distance between the two hook block parts 20, 22 from one another can be changed by suitable control of the auxiliary winch 14.
  • a sufficiently high pretension can be generated on the hoisting rope 4 when lifting the suspension element 6, so that it is wound tightly onto the hoisting winch 5. This prevents the occurrence of cuts and ensures good wrapping quality.
  • a weight 40 is attached to the receiving means 23 of the lower hook block part 22 of the pretensioning hook block 10 attached to the suspension element 6, as in the Figure 2 is shown.
  • the weight 40 is connected to the suspension element 6 and thus to the hoist rope 4 via the pretensioning hook bottle 10 and generates a suitable pretensioning force.
  • the two deflection rollers 24, 26 have parallel axes of rotation.
  • the fastening means 29 is located above the second deflection roller 26 on the lower hook block part 22, while the receiving means 23 is arranged below the second deflection roller 26.
  • the further deflection roller 28 is located obliquely above the first deflection roller 24 on the upper hook block part 20, while the fastening means 21 is arranged above the first deflection roller 24.
  • the distance between the first deflection roller 24 and the further deflection roller 28 can essentially correspond to the distance between the corresponding deflection rollers for the hoist rope 4 and the auxiliary rope 12 on the boom head or on the mast nose 16.
  • the two hook block parts 20, 22 can be pushed into one another, the upper hook block part 20 being inserted with a receiving area 34 designed as a spring into a receiving area of the lower hook block part 22 designed as a groove 32.
  • the receiving areas 32, 34 can be beveled, which makes threading or inserting easier.
  • the two hook block parts 20, 22 can be locked manually via bolts 30 (see also Fig. 5 ).
  • FIG. 6 An alternative exemplary embodiment is shown in outline, in which the preload hook bottle 10 has a locking mechanism. Accordingly, a retaining bolt 38 is arranged in the upper region of the lower hook block part 22, while a pivotable hook element 36 is located at the lower region of the upper hook block part 20.
  • the bolt 38 automatically pushes the hook 36 aside and pivots it about its pivot axis, as shown.
  • the hook block parts 20, 22 reach their fully retracted locking position, the hook 36 snaps into place and automatically locks the two hook block parts 20, 22.
  • a spring element (not shown) can be provided, which forces the hook 36 into its locking position.
  • the hook block parts 20, 22 do not have to be locked manually, which makes bringing them together easier, especially at great heights.
  • the Figures 8-11 show an overall side view of the crane 1 during a stroke of the suspension element 6 according to an exemplary embodiment of the method according to the invention.
  • This assumes the situation that a load is to be picked up from an elevated position and placed on the ground 9 for dismantling.
  • the previously lowered suspension element 6 is connected to a weight 40 via the pretension hook bottle 10 according to the invention.
  • the pretensioning hook bottle 10 is attached to the load hook 6b in the locked state.
  • the weight 40 is attached to the receiving means 23 of the preload hook bottle 10.
  • the pre-tensioning hook bottle 10 can either already be connected to the auxiliary rope 12 or, for example during the first stroke, the auxiliary rope 12 is reeved into the pre-tensioning hook bottle 10 after it has been attached.
  • the pre-tensioning hook block 10 is unlocked or unscrewed and the weight 40 is slightly raised by operating the lifting winch 5 and the auxiliary winch 14 (see Fig. 8 ).
  • the weight can lift 40 off the ground.
  • the weight 40 can be kept close to the ground 9 during the lifting of the suspension element 6, in particular floating. As long as the weight 40 is in a floating state, its weight applies a high pretension to the hoist rope 4 or the hoist winch 5.
  • the auxiliary winch 14 is unwound, the lower hook block part 22 of the pre-tensioning hook block 10 is lowered and the weight 40 is placed on the floor 9 and hung out.
  • the lower hook block part 22 is then pulled up by winding up the auxiliary winch 14 and brought to the upper hook block part 20.
  • the hook block parts 20, 22 When the hook block parts 20, 22 are in their locking position, they can be bolted together (or automatic locking takes place as explained above). This can be done from the elevated position, where the load to be transported or set down must also be picked up.
  • the Figure 10 shows the situation after the hook block parts 20, 22 have been brought together and locked, while the pre-tensioning hook block 10 is still attached to the suspension element 6.
  • the pre-tensioning hook block 10 can now be suspended from the suspension element 6 of the crane 1 (see Fig. 11 ) and then lowered to the ground 9 using the auxiliary winch 14.
  • the suspension element 6 is still in the elevated position and can now be connected to the load to be transported.
  • the lifting winch 5 By operating the lifting winch 5, the load can be placed on the floor 9.
  • the steps explained above can be carried out again.
  • the advantage of this method is the weight 40 lifted from the floor 9, which means that the entire prestressing process can be monitored by the control of the crane 1.
  • the pre-tensioning process corresponds to regular crane operation. In this case it is a monitored two-hook operation with a hook 6b on the main or lifting winch 5 as the main lift and a hook 23 on the auxiliary winch 14 via the mast nose 16 with a common load.
  • auxiliary winch 14 for the auxiliary lift and the short mast nose 16 are standard equipment on many lattice boom cranes and also on large telescopic cranes. During the pre-tensioning process, the crane 1 can also be rotated and/or moved, which is not possible with a solution with an auxiliary vehicle and/or an auxiliary winch parked on the ground.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Control And Safety Of Cranes (AREA)

Claims (16)

  1. Système de levage pour une grue (1), en particulier une grue mobile ou à chenilles, destiné à générer une précontrainte de câble de levage pendant un levage d'un moyen porteur (6) de la grue (1), comprenant une moufle à crochet de précontrainte (10) ainsi qu'un câble auxiliaire (12) relié à celle-ci, qui est monté de manière enroulable et déroulable sur un treuil auxiliaire (14) disposé ou pouvant être monté sur la grue (1) et qui est guidé par le biais d'un dispositif de renvoi (16) disposé ou pouvant être monté sur une flèche (2) de la grue (1), caractérisé en ce que la moufle à crochet de précontrainte (10) peut être divisée et comprend deux parties de moufle à crochet (20, 22) reliées l'une à l'autre par le biais du câble auxiliaire (12) et verrouillables l'une avec l'autre de manière libérable, dont une partie de moufle à crochet (20) supérieure présente un moyen de fixation (21) destiné à la fixation sur le moyen porteur (6) et une partie de moufle à crochet (22) inférieure présente un moyen de réception (23) destiné à la fixation d'un poids (40).
  2. Système de levage selon la revendication 1, dans lequel dans la moufle à crochet de précontrainte (10), la partie de moufle à crochet (20) supérieure comprend au moins une première poulie de renvoi (24) et la partie de moufle à crochet (22) inférieure au moins une seconde poulie de renvoi (26), par le biais desquelles le câble auxiliaire (12) est guidé.
  3. Système de levage selon la revendication 1 ou 2, dans lequel, la moufle à crochet de précontrainte (10) présente au moins une poulie de renvoi (28) destinée à faire passer le câble auxiliaire (12) à côté du moyen porteur (6), laquelle est de préférence disposée sur la partie de moufle à crochet (20) supérieure.
  4. Système de levage selon l'une des revendications précédentes, dans lequel la moufle à crochet de précontrainte (10) comprend un mécanisme de guidage, au moyen duquel les parties de moufle à crochet (20, 22) inférieure et supérieure peuvent être amenées dans une position de verrouillage définie lors de leur réunion, le mécanisme de guidage comprenant de préférence un ou plusieurs rails de guidage et/ou un mécanisme à languette et rainure (32, 34).
  5. Système de levage selon l'une des revendications précédentes, dans lequel les parties de moufle à crochet (20, 22) inférieure et supérieure présentent des moyens de liaison destinés au verrouillage libérable l'une avec l'autre, les parties de moufle à crochet (20, 22) inférieure et supérieure pouvant de préférence être boulonnées au moyen d'un ou de plusieurs boulons (30).
  6. Système de levage selon l'une des revendications précédentes, dans lequel les parties de moufle à crochet (20, 22) inférieure et supérieure peuvent être verrouillées au moyen d'un mécanisme de verrouillage (36, 38) actionnable, le mécanisme de verrouillage (36, 38) étant de préférence actionnable activement ou passivement lors de la réunion des parties de moufle à crochet (20, 22) ou après celle-ci.
  7. Système de levage selon la revendication 6, dans lequel le mécanisme de verrouillage est conçu pour se verrouiller automatiquement lors de la réunion des parties de moufle à crochet (20, 22) inférieure et supérieure et comprend de préférence un élément de ressort et/ou un (36, 38) mécanisme d'encliquetage.
  8. Système de levage selon l'une des revendications précédentes, comprenant en outre un treuil de levage (5) sur lequel un câble de levage (4) relié au moyen porteur (6) est monté de manière enroulable et déroulable, le treuil de levage (5) et le treuil auxiliaire (14) étant de préférence actionnables indépendamment l'un de l'autre et le moyen porteur (6) et la moufle à crochet de précontrainte (10) pouvant de ce fait être levés indépendamment l'un de l'autre.
  9. Système de levage selon la revendication 8, comprenant en outre une commande de grue, qui est configurée pour commander le treuil de levage (5) et le treuil auxiliaire (14) de manière synchronisée de telle manière que, pendant un levage du moyen porteur (6), par l'enroulement du treuil de levage (5) et le déroulement simultané du treuil auxiliaire (14), un poids (40) fixé à la moufle à crochet de précontrainte (10) déverrouillée est maintenu suspendu au-dessus du sol (9) à une hauteur donnée ou dans une zone donnée.
  10. Grue (1), en particulier grue mobile ou à chenilles, comportant un système de levage selon l'une des revendications précédentes, dans laquelle le moyen porteur (6) est de préférence une moufle à crochet et/ou le dispositif de renvoi (16) est un nez de mât pouvant être monté sur la pointe de flèche et/ou le treuil auxiliaire (14) est disposé sur un châssis supérieur (3) de la grue (1).
  11. Moufle à crochet de précontrainte (10) d'un système de levage selon l'une des revendication 1 à 9 comportant un moyen de fixation de câble auxiliaire (29) destiné à la fixation du câble auxiliaire (12), qui est de préférence disposé sur la partie de moufle à crochet (22) inférieure.
  12. Procédé de levage d'un moyen porteur (6) d'une grue (1) au moyen d'un système de levage selon l'une des revendications 1 à 9, comportant les étapes consistant à :
    - fixer la moufle à crochet de précontrainte (10) au moyen porteur (6) descendu,
    - déverrouiller les parties de moufle à crochet (20, 22) supérieure et inférieure,
    - fixer un poids (40) à la partie de moufle à crochet (22) inférieure,
    - lever le moyen porteur (6), en particulier en enroulant un câble de levage (4) relié au moyen porteur (6) sur un treuil de levage (5), moyennant quoi les parties de moufle à crochet (20, 22) inférieure et supérieure s'éloignent l'une de l'autre,
    - déposer le poids (40) en déroulant le treuil auxiliaire (14) pendant que le moyen porteur (6) se trouve dans une position levée et libérer la partie de moufle à crochet (22) inférieure du poids (40).
  13. Procédé selon la revendication 12, dans lequel, après le dépôt et la libération du poids (40), la partie de moufle à crochet (22) inférieure est levée par enroulement du treuil auxiliaire (14) et est réunie avec la partie de moufle à crochet (20) supérieure, de telle sorte que les parties de moufle à crochet (20, 22) peuvent être verrouillées l'une avec l'autre, la moufle à crochet de précontrainte (10) verrouillée étant de préférence ensuite libérée du moyen porteur (6) et déposée sur le sol (9) par déroulement du treuil auxiliaire (14).
  14. Procédé selon la revendication 12 ou 13, dans lequel, pour le levage du moyen porteur (6), le treuil de levage (5) et le treuil auxiliaire (14) sont commandés de manière synchrone ou synchronisée, en particulier par le biais d'une commande de grue de la grue (1), de telle manière que, par l'enroulement du treuil de levage (5) et le déroulement simultané du treuil auxiliaire (14), le poids (40) est maintenu en particulier suspendu au-dessus du sol (9) à une hauteur donnée.
  15. Procédé selon la revendication 14, dans lequel le levage du moyen porteur (6) est effectué dans un mode à deux crochets surveillé par la commande de grue, une régulation automatique des treuils de levage et auxiliaire (5, 14) étant de préférence effectuée par la commande de grue de telle manière que le poids (40) est maintenu à une hauteur définie au-dessus du sol (9) et/ou dans une position donnée.
  16. Utilisation d'un système de levage selon l'une des revendications 1 à 9, comportant les étapes consistant à :
    - fixer la moufle à crochet de précontrainte (10) au moyen de réception de charge (6) descendu,
    - déverrouiller les parties de moufle à crochet (20, 22) supérieure et inférieure,
    - fixer un poids (40) à la partie de moufle à crochet (22) inférieure,
    - lever le moyen porteur (6), en particulier en enroulant un câble (4) relié au moyen porteur (6) et un treuil (5), moyennant quoi les parties de moufle à crochet (20, 22) inférieure et supérieure s'éloignent l'une de l'autre, et
    - dérouler simultanément le treuil auxiliaire (14) de telle façon que le poids (40) reste sur le sol et qu'il y a une force de traction au brin constante dans le câble de treuil auxiliaire.
EP22171744.0A 2021-05-21 2022-05-05 Système et procédé de levage pour une grue Active EP4091980B1 (fr)

Applications Claiming Priority (1)

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DE102021113314.9A DE102021113314B4 (de) 2021-05-21 2021-05-21 Hubsystem und -verfahren für einen Kran

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EP4091980B1 true EP4091980B1 (fr) 2024-02-21

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US (1) US20220371862A1 (fr)
EP (1) EP4091980B1 (fr)
JP (1) JP2022179440A (fr)
DE (1) DE102021113314B4 (fr)
DK (1) DK4091980T3 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1436608A (en) * 1921-08-10 1922-11-21 Robert S Rodier Block and tackle apparatus
CA1033688A (fr) * 1975-10-23 1978-06-27 Manitowoc Company Portique, fleche de levage et contrepoids demontables
DE10229844A1 (de) 2002-07-03 2004-01-15 Sennebogen Maschinenfabrik Gmbh Hebevorrichtung sowie Hakenflasche hierfür
DE20319073U1 (de) 2003-11-28 2005-04-21 Liebherr-Werk Ehingen Gmbh Kran, insbesondere Mobilkran
US8397924B2 (en) * 2008-09-19 2013-03-19 Manitowoc Crane Companies, Llc Drum frame system for cranes
DE202008014484U1 (de) 2008-10-31 2010-03-18 Liebherr-Werk Ehingen Gmbh Ballastgewicht
DE102010025482A1 (de) * 2010-06-29 2011-12-29 Liebherr-Werk Biberach Gmbh Verfahren zum Betrieb eines Turmdrehkranes
JP6080537B2 (ja) 2012-12-25 2017-02-15 川崎重工業株式会社 荷役装置
DE202013006584U1 (de) 2013-07-22 2014-10-23 Liebherr-Werk Ehingen Gmbh Ballastvorrichtung zur Erzeugung einer Windenvorspannung

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DE102021113314A1 (de) 2022-11-24
JP2022179440A (ja) 2022-12-02
US20220371862A1 (en) 2022-11-24
DE102021113314B4 (de) 2023-12-07
EP4091980A1 (fr) 2022-11-23

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