EP2402281A1 - Procédé destiné au fonctionnement d'une grue à tour - Google Patents

Procédé destiné au fonctionnement d'une grue à tour Download PDF

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Publication number
EP2402281A1
EP2402281A1 EP20110004793 EP11004793A EP2402281A1 EP 2402281 A1 EP2402281 A1 EP 2402281A1 EP 20110004793 EP20110004793 EP 20110004793 EP 11004793 A EP11004793 A EP 11004793A EP 2402281 A1 EP2402281 A1 EP 2402281A1
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EP
European Patent Office
Prior art keywords
deflection
auxiliary
rope
crane
hoist
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
EP20110004793
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German (de)
English (en)
Other versions
EP2402281B1 (fr
Inventor
Joachim Mayer
Benjamin Scholger
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Liebherr Werk Biberach GmbH
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Liebherr Werk Biberach GmbH
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Publication of EP2402281A1 publication Critical patent/EP2402281A1/fr
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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
    • B66C23/342—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes with telescopic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/10—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for preventing cable slack
    • 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

Definitions

  • the present invention relates to a method for operating a tower crane, on the hoist winch a hoist rope is drummed, the length of which is greater than the length required for normal operation.
  • Object of the present invention is to provide a method for operating such a tower crane, by which damage to the hoisting rope can be avoided.
  • this object is achieved by a method according to claim 1.
  • This is a method for operating a tower crane, on the hoist winch a hoist rope is drummed, whose length is greater than the length required for normal operation.
  • the hoist rope is guided via an auxiliary deflection in order to unwind the hoist rope area which is not unwound in normal operation.
  • the use of an auxiliary deflection makes it possible to unwind the unwound in normal operation Hubseil Symposium and réelletrommeln under pretension new.
  • the auxiliary deflection can be used in particular to allow unwinding and tumbling without the occurrence of slack rope, i. without the rope would have to be stored.
  • the method according to the invention is used in particular when there is a multi-layer winding on the drum of the hoisting winch, the lower layers of which are not unwound in normal operation. These lower cable layers can now be unwound according to the invention via the auxiliary deflection and drummed again.
  • a lifting operation can take place with the hoisting rope guided via the auxiliary deflection.
  • the rope is therefore not stored on the hoist drum, but in the unwound state on the auxiliary steering.
  • the auxiliary deflection can be used here at low hook heights in order to store the rope length that is not required, and then be disassembled at greater hook heights, so that the additional rope length is now available for normal operation.
  • the unwound during the lifting rope length can be maintained despite a change in the hook height in a range in which no damage occurs.
  • the auxiliary deflection can be arranged according to the invention on the crane structure and rotate with the boom. Such an auxiliary deflection is particularly advantageous when a lifting operation is to be carried out with guided over the auxiliary deflection hoist rope.
  • the auxiliary deflection takes place via a deflection roller, which is detachably fastened to an attachment point on the crane structure. At low hook height so the pulley can be attached to the attachment point to increase the recoverable Hubseilhari. If the crane is then used with a higher hook height, the auxiliary deflection can be released again.
  • the method according to the invention described above can be used in particular for bottom slewing cranes.
  • the tower is arranged on a revolving platform, which is rotatable about a vertical axis of rotation.
  • the auxiliary deflection may comprise an auxiliary bottle, which is releasably connectable to a mounting point on the revolving platform or on the tower.
  • This can the tower height can be used for hoist rope storage.
  • the hoist rope of pulleys runs in the region of the tower head to form an auxiliary bottle, which is fastened to the revolving platform or to the tower.
  • the already existing ballast bottle can be used to increase the unwound Hubseilin.
  • the Ballastierflasche can be attached to an attachment point on the platform, so that the hoisting rope from the hoist winch to a deflection roller in the area of the tower head, from there to Ballastierflasche and from this back again to a deflection roller in the area of the tower head, from where the hoist rope then runs as usual to the trolley.
  • auxiliary bottle over which the hoist rope runs.
  • the additional bottle can be arranged, for example, within the cross-sectional area of the tower, so that the stored hoist rope runs inside the tower.
  • the hoist rope runs from the hoist winch to a deflection roller in the area of the tower head, from there to the auxiliary bottle and from this back again to a deflection roller in the area of the tower head, from where the hoisting rope then runs as usual to the trolley.
  • the Hubseil appointedung shown above can also be used in top slewing cranes.
  • the tower itself is stationary while the boom is rotated relative to the tower.
  • the hoist winch is usually arranged on a counter-jib.
  • an auxiliary bottle can be arranged within the cross section of the tower. Furthermore, the auxiliary bottle is advantageously mounted rotatably about a vertical axis of rotation of the tower so that it can rotate with the boom. Also in this embodiment, the hoist cable runs from a deflection roller in the region of the jib to the auxiliary bottle and from there back to a further deflection roller in the region of the jib. Again, several can Attachment points are provided at different heights to adjust the stored Hubseilin to the hook height.
  • a servomotor may be provided, which is controlled synchronously to the slewing gear of the boom and so rotates the auxiliary bottle with the boom.
  • the lifting operation is carried out without via the auxiliary deflection guided hoist rope and is interrupted at certain intervals to unwind the Hubseil Scheme not unwound in lifting operation by means of the auxiliary deflection and réelletrommeln again. Also, this damage to the lower cable layers can be avoided.
  • the auxiliary deflection can take place via an auxiliary bottle, which is drained to unwind the hoisting rope.
  • the maximum unwound rope length can be increased without slack rope by additionally draining an auxiliary bottle next to the hook bottle.
  • the auxiliary bottle can be arranged on the hook bottle.
  • the auxiliary bottle is advantageously detachably connectable to the hook bottle so as to provide an auxiliary deflection for unwinding a larger rope length.
  • the auxiliary bottle can first be attached to the boom.
  • the trolley is then moved to a position under the auxiliary bottle and the auxiliary bottle is placed on the cable strands in the trolley.
  • the auxiliary bottle is connected to the hook bottle and drained together with this. Now the rope is rewound, if necessary with attached load.
  • the crane is back in its operating state, in which the normal operation can be continued.
  • the deflection arrangement is arranged on the counter-jib, via which the hoist rope is guided. In the area This Umlenkungsan Aunt can then be placed and drained the auxiliary bottle on the hoist rope.
  • the deflection arrangement is mounted in the region of the counter-jib.
  • the load hook is lowered to the ground and then blocked the hoist rope.
  • the blockage of the hoisting rope can take place, for example, in the area of the tower top.
  • the cable is now loosened by unwinding and placed on the Umlenkungsan Ich.
  • the auxiliary bottle is now placed and drained between two pulleys of Umlenkungsan Ich on the hoist.
  • the hoisting rope can now be drummed by lifting the auxiliary cylinder.
  • this additional weight can be placed on the auxiliary bottle.
  • the cable string can now be taken back from the deflection arrangement and the blockade can be solved.
  • the crane is now available again in the operating state, so that normal operation can be continued.
  • the auxiliary deflection can take place via a deflection arrangement which is arranged in the floor area.
  • a deflection arrangement which is arranged in the floor area.
  • the load hook is attached to the trolley and drained the rope in another boom area.
  • the sagging rope is now guided over a arranged on the ground rope deflection.
  • the load hook is released and also drained.
  • the rope area not used in normal operation can now be re-drummed. This may also be done by attaching a load if necessary.
  • the load hook can now be fastened to the cat again and the rope loosened by the rope deflection arranged on the floor can be wound up.
  • a further cable deflection is arranged on the boom in addition to the rope deflection arranged on the ground. Further advantageously, the rope between the trolley and the boom tip is drained. In particular, the further deflection is arranged in the region of the cantilever tip.
  • the cable deflections can be sheet metal parts, which have a certain deflection radius and thus prevent buckling of the hoisting rope.
  • the further deflection is detachably connectable to the boom.
  • the auxiliary deflection takes place via at least two deflections, between which the hoist rope extends to extend the wind-up hoisting rope area.
  • at least three deflections are provided.
  • the deflections may be additional deflections, or already existing on the crane deflections or the trolley, which are now used according to the invention for auxiliary deflection.
  • the hoist rope runs in the maximum unwound position from the trolley to the lowered hook block and back.
  • the hoist cable extends from a deflection at the level of the boom to an auxiliary deflection in a lower position, in particular in the vicinity of the ground, and back to a deflection at the level of the boom.
  • the present invention makes it possible in the easiest way to rebound at regular intervals the rope of the lower layers of a multi-layer winding with bias, so as to prevent the damage to these cable layers, although the crane is mounted with a longer Hubseilin than necessary for the hook height used would.
  • the auxiliary deflection invention advantageously allows the unwinding of a Hubseilin, which would correspond to a hook height of more than 110% of the current hook height in normal operation, further advantageously more than 150% of the current hook height, further advantageously of about twice the current hook height.
  • the method according to the invention can also be used for cable lengths greater than twice the hook height.
  • different deflection variants can be combined with each other.
  • the drumming of the unused in normal operation Hubseil Schemees with selectable bias can be done by the lifting of the load hook and / or the auxiliary bottle takes place if necessary with attached load.
  • the inventive method can be used in particular when the crane is initially operated with a low first hook height and to be operated on the same site in a second step with a second, higher hook height.
  • a hoisting rope can be used even at the first hook height, which is sufficient for the second hook height.
  • the hoisting rope which normally would not be completely unwound in the first set-up state, is unwound and reamed again. This can be done either by the Hubseil askedung on the auxiliary deflection during the lifting operation or at certain intervals with interruption of the lifting operation.
  • the crane After completion of the first phase of operation, the crane can be converted and the hook height can be increased without having to change the hoist rope.
  • the increase of the hook height is carried out in particular by increasing the tower, for example by inserting further tower elements.
  • the present invention can therefore be used in particular when the hook height of a crane on the construction site is to be increased or changed in the course of use.
  • the present invention is therefore used in particular in climbing cranes.
  • the present invention can also always be used advantageously when a crane with the same hoist rope but different hook heights to be used. In this way, the number of possible with the same equipment setup states of a crane can be increased.
  • the present invention further includes, in addition to the method, a crane with auxiliary steering as described above.
  • the crane may be equipped with one or more of the auxiliary deflections, which were shown above.
  • the auxiliary deflection is fastened to an attachment point on the crane structure, advantageously releasably securable.
  • the auxiliary deflection can also be detachably fastened to the hook bottle.
  • the auxiliary deflection can also be arranged on the ground.
  • a deflection arrangement can be arranged on the boom or on the tower head, from which the cable extends to a further lower deflection.
  • the auxiliary deflection may in particular comprise an auxiliary bottle.
  • the auxiliary deflection may comprise one or more deflections, which are manufactured as sheet metal parts, which have a fixed radius of curvature for preventing a kink in the hoist rope.
  • the present invention further includes an auxiliary steering for a crane as described above.
  • Such an auxiliary deflection can be used to allow existing cranes to unwind and tumble unused in normal operation Hubseil Symposiumen.
  • auxiliary deflection makes it possible to unwind a hoist rope area which can not be unwound in normal operation and then to reel it up under prestressing.
  • the method is used in particular when the hoist rope is drummed in a multi-layer winding on the drum of the hoist winch. Unwinding and re-drumming of the hoisting rope area which is not unwound in normal operation should take place at regular time intervals in order to rebound the rope of the lower layers with pretension and thus avoid damage to these rope layers.
  • FIGS. 1 to 4 Now show a first embodiment of the present invention, as it can be used in a winch crane.
  • the winch crane has a rotatable about a vertical axis of rotation rotary platform 1, on which the tower is arranged.
  • the tower consists in FIG. 1 of two tower segments 2 and 3, wherein the upper tower segment 3 can be pushed out of the lower tower segment 2.
  • At the top of the tower boom 4 is arranged.
  • a trolley 5 is slidably mounted.
  • the hoist rope runs from the trolley 5 to a hook block 6, on which the load hook 7 is arranged.
  • the hoist rope is moved over a hoist winch 10, on which the hoist rope 11 is drummed.
  • the hoist winch is arranged on the revolving stage, which also the in Fig. 1 not shown ballast carries. The lifting operation takes place thereby, by the load hook 7 is raised or lowered by operating the hoist winch 10.
  • an auxiliary deflection is provided according to the invention, in which an auxiliary tab 12 is attached to an attachment point 13 on the crane structure.
  • the hoist cable runs over two pulleys 8 and 9, which are located at boom height on the spire, to the auxiliary bottle 12.
  • the auxiliary bottle 12 is fixed in the embodiment at the height of the revolving platform on the crane structure. This allows a rope length to be unwound, which corresponds to the double hook height.
  • auxiliary bottle 12 Since the auxiliary bottle 12 is attached to the crane structure and rotates with this, a lifting operation is possible while the hoist rope is guided over the Hilfsum ein. At the in FIG. 1 shown embodiment can therefore be carried out at low hook height a lifting operation with auxiliary deflection.
  • the unused cable length is stored on the auxiliary deflection, so that eliminates the problems associated with storage on the drum. If the crane is then converted to a higher hook height, the auxiliary deflection is released and the lifting operation takes place without auxiliary deflection. So the entire rope length can be used for lifting operation.
  • ballast bottle already present in some vertical winch cranes is used as auxiliary deflection.
  • a ballast bottle is commonly used to lift ballast elements that are placed on the turntable 1 to load the crane during ballast while the crane is being upgraded.
  • FIG. 2 is the rope course without Hubseil agendaung invention, ie shown in normal operation.
  • the ballast bottle is arranged on the tower head, so that the hoist rope 10 is deflected by the deflection rollers 8 and 9 only a minimal distance to Ballastierflasche 12.
  • FIG. 3 and 4 show the cable course when using the Ballastierflasche invention as auxiliary deflection.
  • the Ballastierflasche 12 is as in FIG. 4 shown attached to an attachment point 13 on the revolving stage.
  • the Ballastierflasche 12 is attached via a releasable attachment to the revolving stage 13.
  • the hoist cable thus extends over an additional double strand 14 from the pulleys 8 and 9 in the region of the tower head to the auxiliary deflection in the region of the tower base.
  • a hoist rope area not required for the current hook height can be stored via the auxiliary deflection. If the hook height is increased by raising the tower, the auxiliary steering can be removed and the hoist rope as in FIG. 2 be guided without auxiliary deflection.
  • FIG. 5 shows a second embodiment of the present invention is shown, which is also used in a winch crane.
  • the structure of the Untengirns corresponds substantially to the already to the FIGS. 1 to 4 described structure.
  • an additional bottle 17 is used.
  • This auxiliary bottle 17 is fastened to the crane structure at an attachment point 18, which in the exemplary embodiment lies within the cross-sectional area of the tower.
  • the rope strand formed by the auxiliary deflection thus runs within the tower.
  • two guide rollers 15 and 16 are arranged in the head region of the tower, which deflect the rope to the auxiliary bottle 17 out.
  • the additional bottle 17 can be arranged at different heights within the tower, for which corresponding mounting portions 18 are provided at different heights.
  • FIG. 6 a third embodiment of the present invention is shown in which the Hubseil openedung is used in a top-slewing crane.
  • the top rotator in this case has a fixed tower 20, wherein on the tower head a slewing gear 28 is provided, via which the boom 21 can be rotated about a vertical axis of rotation.
  • a trolley 5 is arranged, via which the hoisting rope 11 is guided to the hook block 6 with the crane hook 7.
  • the winch for actuating the hoist rope 11 is arranged, and the counter ballast 23rd
  • an auxiliary bottle 26 is now used, which is rotatably mounted within the cross-sectional area of the tower at an attachment point 27.
  • the auxiliary bottle 26 can rotate with the rotational movement of the arm 21.
  • the hoist cable runs over two pulleys 24 and 25, which are arranged in the boom 21 above the tower, to the auxiliary bottle 26 in the tower.
  • several attachment points 27 are provided in different heights in the tower to adjust the length of the rope stored within the tower flexible.
  • the auxiliary bottle 26 can be rotatably attached to the crane structure via a vortex.
  • a servomotor is conceivable, which rotates the auxiliary bottle 26 synchronously with the rotating mechanism 28.
  • FIG. 7 the fourth embodiment of the present invention is shown.
  • a crane according to the invention is a top slewing crane with a fixed tower 30.
  • the tower 30 has at its upper end a turntable 38, via which the boom 31 is rotatable about a vertical axis of rotation.
  • a trolley 5 is arranged, via which the hoisting rope runs to the hook block 6 with the crane hook 7.
  • the hoist winch 32 and the counter-ballast 33 is arranged.
  • the inventive method is carried out via an auxiliary bottle 34, which is initially arranged releasably on the boom 31.
  • the trolley In a first step, the trolley is now moved to a position below the auxiliary bottle 34.
  • the auxiliary bottle which z. B. can be performed one or two-roller, lowered down to the cable strands in the trolley 5.
  • the auxiliary bottle 34 In a third step, the auxiliary bottle 34 is now connected to the hook bottle 6. The auxiliary bottle thus forms an additional deflection on the hook bottle.
  • the load hook is now discharged as far as necessary to unwind the unwound in normal operation Hubseil Symposium Edition, that is, until only the necessary security windings remain on the hoist winch.
  • a fifth step the rope is wound on the hoist winch, which if necessary can be done with attached load to bring a corresponding bias in the hoist rope. If the hook bottle is raised again to the boom, the connection between the auxiliary bottle 34 and the hook bottle 6 is released in a sixth step. In a seventh step, the auxiliary bottle is bolted to the boom again. The crane is now in the operating state again, so that the lifting operation can be continued by moving the load hook.
  • FIG. 8 is shown a further embodiment of a method according to the invention, which is also used in a overhead slewing crane.
  • the overhead slewing crane corresponds in its general equipment in the FIG. 7 shown overhead crane.
  • the auxiliary deflection is also again via an auxiliary bottle, which is not connected to the hook bottle 6.
  • an additional deflection 40 arranged on the counter-arm 37 is used in order to lower the auxiliary cylinder 41.
  • the additional deflection 40 is mounted in the region of the counter-jib 37 and has two deflection rollers or a deflection roller and a sheet metal deflection, from which the hoisting cable 11 is deflected to the auxiliary lug 41.
  • an additional strand 43 is again formed, through which not unwound in normal operation Hubseil can be unwound.
  • the process proceeds as follows: First, in the normal operating state of the load hook 6 is lowered to the ground. In a second step, the hoist rope is now blocked so that the cable strand with the load hook 6 is no longer lowered upon actuation of the hoist winch. The blocking can be at the top of the tower 42 z. B. via a terminal. In a third step, the cable strand between hoist and blockage is loosened by a unwinding of the hoist drum. In a fourth step, the loose rope strand is now placed on the pulleys of the additional deflection 40. In a fifth step, the auxiliary tab 41 is placed between the two pulleys of the additional deflection 40 on the loose rope strand.
  • auxiliary bottle 41 is deflated until only the necessary security windings rest on the lifting drum.
  • the hoisting rope is drummed by lifting the auxiliary bottle 41. If necessary, additional weight can be attached to the auxiliary bottle in order to drum up the hoist rope with the appropriate pretensioning.
  • the auxiliary bottle 41 is lifted from the rope and relieved the rope strand.
  • the rope blockage is removed, so that the tower is back in its normal operating state. Now the crane operation can be continued.
  • FIG. 9 a sixth embodiment of the present invention is shown, which is also used in a overhead slewing crane. This in turn shows the general structure of the already in FIGS. 7 and 8th overhead slewing cranes.
  • the Hubseilauftrommelung carried out differently than in FIGS. 7 and 8th not by draining an auxiliary bottle, but by the rope between the trolley 5 and boom tip 52 is drained.
  • the hoist rope is then guided over a cable guide 50, which is arranged on the ground.
  • the unwinding of the other hoisting rope is done by releasing the hook block 6, while the hoist rope is guided over the deflection 50.
  • a further deflection 51 is arranged in the exemplary embodiment on the boom 31.
  • the deflection 51 is arranged close to the swivel in the boom tip.
  • Both deflections 50 and 51 are designed as sheet metal parts, which have a fixed deflection radius over which the cable is guided, so that damage to the rope is prevented.
  • the arranged at the bottom cable guide 50 is a sheet metal part with a radius of e.g. 100 mm to 1000 mm, in the exemplary embodiment of 500 mm, while the further arranged on the crane deflection a sheet metal part with a radius of z. B. 100 mm to 1000 mm, in the embodiment of 250 mm.
  • the radius of the rope deflection 50 arranged at the bottom can be greater than the radius of the deflection 51 arranged on the crane.
  • the deflector 51 is installed in the vicinity of the swivel and the hoist rope over the deflection radius of the deflector 51 out.
  • the hook block is lifted and attached to the trolley, which can be done by bolting.
  • the trolley is preferably arranged in an area in the vicinity of the tower in order to have the largest possible Hubseilstrang between the jib tip and the trolley available.
  • the rope between trolley and boom tip is now drained, so that a sag of the rope to the ground is created.
  • the rope is guided in a fourth step around the cable guide 50 arranged there.
  • the load hook is now released from the trolley and drained to unwind additional rope.
  • the load hook raised again to rewind the hoist rope. This can be done by attaching a load, if desired. The load hook is then connected to the cat again.
  • the rope is released from the arranged on the ground rope deflection 50 and wound the sagging rope.
  • the cable guide 51 is removed at the swivel.
  • the load hook is released from the trolley again. The crane is now in its operating state so that crane operation can continue.
  • the method can be applied by multiple arrangements of cable deflections for larger cable lengths than twice the value of the hook height.
  • further deflections 51 and further deflections 50 must be provided accordingly on the boom.
  • FIG. 10 Now, an embodiment of the boom 51 arranged on the deflection is shown.
  • This has a cable support surface 52 with a radius of curvature of 250 mm.
  • On the rope support side walls 53 and 54 are arranged left and right, which support the hoisting rope laterally to the deflection.
  • bores 56 are provided for screws, via which the hoist rope can be secured.
  • the cable deflection continues to have a tab with an opening 55, via which it can be mounted on the boom.
  • the tab is angled at a side wall 54 of the cable support 52 so arranged that the opening 55 is located in the median plane of the cable guide.
  • the present invention makes it possible in the simplest way to unwind and unravel unused cable areas during normal operation.
  • unwinding and tumbling can take place without a slack rope, that is to say without the rope resting on it.
  • the tumbling can be done with an adjustable bias.
  • the length of the thereby windable and inflatable hoisting rope thereby corresponds to a hook height of more than 110% of the current hook height of the crane, furthermore advantageously more than 120%, furthermore advantageously more than 150% and furthermore advantageously about 200%.
  • the unwindable cable length can be further increased to a multiple of the hook height.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)
EP11004793.3A 2010-06-29 2011-06-10 Procédé destiné au fonctionnement d'une grue à tour Active EP2402281B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010025482A DE102010025482A1 (de) 2010-06-29 2010-06-29 Verfahren zum Betrieb eines Turmdrehkranes

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EP2402281A1 true EP2402281A1 (fr) 2012-01-04
EP2402281B1 EP2402281B1 (fr) 2015-10-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4091980A1 (fr) * 2021-05-21 2022-11-23 Liebherr-Werk Ehingen GmbH Système et procédé de levage pour une grue

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102923587B (zh) * 2012-11-15 2015-05-13 中联重科股份有限公司 托绳装置、塔机起重臂及其吊绳防坠方法、塔机
CN108516482A (zh) * 2018-06-22 2018-09-11 中国五冶集团有限公司 一种起重钢丝绳内力消减结构

Citations (3)

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DE4206359A1 (de) * 1991-03-16 1992-09-17 Ledergerber Hans Juergen Turmkran
DE4206630A1 (de) * 1991-12-11 1993-06-17 Ledergerber Hans Juergen Turmkran

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DE3417456A1 (de) * 1984-05-11 1985-11-14 Peiner Hebe- Und Transportsysteme Gmbh, 5500 Trier Turmkran
DE4206359A1 (de) * 1991-03-16 1992-09-17 Ledergerber Hans Juergen Turmkran
DE4206630A1 (de) * 1991-12-11 1993-06-17 Ledergerber Hans Juergen Turmkran

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EP4091980A1 (fr) * 2021-05-21 2022-11-23 Liebherr-Werk Ehingen GmbH Système et procédé de levage pour une grue

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