EP2984024B1 - Flèche de grue repliable et grue - Google Patents

Flèche de grue repliable et grue Download PDF

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Publication number
EP2984024B1
EP2984024B1 EP14713038.9A EP14713038A EP2984024B1 EP 2984024 B1 EP2984024 B1 EP 2984024B1 EP 14713038 A EP14713038 A EP 14713038A EP 2984024 B1 EP2984024 B1 EP 2984024B1
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EP
European Patent Office
Prior art keywords
jib
crane
boom
mounting
rope
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
EP14713038.9A
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German (de)
English (en)
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EP2984024A1 (fr
Inventor
Martin Aßfalg
Gerhard Katein
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 Biberach GmbH
Original Assignee
Liebherr Werk Biberach GmbH
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Publication of EP2984024A1 publication Critical patent/EP2984024A1/fr
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Publication of EP2984024B1 publication Critical patent/EP2984024B1/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
    • B66C23/16—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 jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • 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
    • 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
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • 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
    • B66C23/821—Bracing equipment for booms
    • B66C23/823—Bracing equipment acting in vertical direction

Definitions

  • the invention relates to a folding crane boom for a tower crane, in particular for a vertical winch crane, with at least two articulated boom parts, a boom bracing and a mounting part for boom mounting.
  • the crane boom consists of at least two boom segments, which are folded to save space for crane transport. For crane operation, these are unfolded with the aid of a mounting part and brought into the horizontal position required for crane operation.
  • the boom is braced by additional boom bracing during lifting work.
  • FIG. 1 is a well-known foldable crane jib sketched.
  • the boom comprises two articulated boom segments 1, 2, which can be folded to save space for crane transport.
  • the unfolding of the jib parts 1, 2 is accomplished via the mounting part 4, which is fixed to the one end of the winch 5 and is arranged with the remaining end of the guy rod 3. If the mounting part 4 is released from the winch 5, then the boom parts 1,2 lower due to their weight in the horizontal boom position. After successful boom mounting the rope 4 is relieved. For the subsequent crane operation with a horizontal boom, the mounting part 4 has no further function.
  • a disadvantage of the embodiment shown, however, is that due to the folding mechanism of the boom for the bracing 7 a complex construction is necessary. This is equipped with a Faltkinematikteil and a cable element to allow the lateral unfolding of the guying 7.
  • the DE 299 19 790 U1 and DE 80 13 808 U1 show tower cranes, according to the preamble of claim 1, in which the mounting part is guided over an intermediate support arranged between two boom parts and connected to a boom part and thereby assumes a supporting function.
  • the object of the present invention is to provide a cheaper and easier way of boom bracing for a folding crane boom.
  • the foldable boom comprises at least two articulated boom parts.
  • the first boom part is hinged to the tower, ie the tower top of the crane connectable or connected.
  • the at least second boom part is hingedly connected to the first boom part.
  • the jib parts can be folded against each other or folded together to save space. In crane operation, the jib parts assume a horizontal or almost horizontal orientation.
  • a mounting cable is available, by means of which the individual boom parts can be brought into the operating position.
  • the foldable cantilever can have, in addition to the at least two articulated boom parts connected to one another, one or more further cantilever parts which are connected either rigidly or likewise foldably to the at least two cantilever parts. For example, these may be arranged on the outer tip of the second jib part, in particular be arranged articulated. Individual jib parts can be made in one or more parts.
  • the invention essential idea of the present invention is now to use the hitherto mandatory mounting part for the jib mounting for later crane operation as bracing.
  • the unfolded crane boom is at least partially braced by the mounting part during crane operation with a horizontal boom.
  • Certain parts of the previous boom bracing can be at least partially saved.
  • those parts of the boom bracing can be saved, which were designed particularly complicated due to the required folding kinematics.
  • the crane boom on a central support over which the mounting part is guided by the first boom part to at least a second boom part.
  • the mounting part is guided over the upper tip of the middle support.
  • a pulley is provided, which is attached to the top or in the region of the tip of the central support or are.
  • the central support which is pivotally mounted in the articulated connection of the articulated boom members, further comprises a telescopic mechanism, by means of which the central support or arranged at the top pulley is the lifting rope during the Krandemontage trackable.
  • the mounting part always remains in contact with the pulley.
  • the invention enables a simplified Auslegerabwood, thereby accumulating manufacturing and maintenance costs can be reduced.
  • the mounting part has a double function, a discharge of the mounting part analogous to the prior art is no longer provided.
  • the mounting part is guided from the central support to the outer region of the second jib part or to the vicinity of the outer tip of the second jib part.
  • the mounting part is either fixed at this point or in this area on the second boom part or is deflected by a deflection roller.
  • the distance between the central support and the fixing or deflection point of the mounting part at the outer tip of the second jib part is chosen to be as large as possible.
  • the necessary tethering force can be reduced in crane operation.
  • the crimp arm of the second jib part is reduced to a reasonable level, i. There is a projection beyond the tether. This allows a minimization of the boom steel weight.
  • the mounting part extends from the first jib part, in particular from the articulation point of the first jib part on the crane tower, over the middle support up to the outer tip of the second jib part.
  • the mounting part can lift off the guide or pulley of the center support.
  • constructive solutions for the safe threading of the mounting part are provided during the deployment of the boom parts. It is advisable to equip the pulley with one or more ropes, which facilitate threading of the mounting part during deployment of the boom parts.
  • the pulley of the center support can be equipped with a fixed counter-roller, whereby the mounting part always remains threaded on the center support.
  • this constructive solution has the disadvantage that the cable force for complete boom contractions is very large, since the resulting lever arm at the mounting end is very small.
  • auxiliary installation cables may be provided. These auxiliary cables are connected at the end to the central support and the respective boom part. In addition, these assembly aid cables can simultaneously serve as a means of locking the center support.
  • this can preferably be retracted several times. Conveniently this is a multiple reeving of the rope course between center support and second boom part.
  • one or more deflection rollers are provided in the region of the outer end of the second boom part and on the central support, which allow a Mehrfacheinscherung between central support and second boom part.
  • additional deflection rollers for the mounting part are provided on the first and / or second boom part.
  • at least one deflection roller may be arranged on the first and / or second boom part in the vicinity of the center support.
  • the mounting part extends at least partially parallel to the first and / or second boom segment and is deflected by means of the additional deflection roller to the center support out.
  • at least one additional deflection roller is provided on the first and second boom part, which is mounted with the smallest possible distance to the central support on the respective boom part.
  • the mounting part between the additional pulleys and the central support is reeved several times to further optimize or reduce the attacking holding forces during crane operation on the mounting part.
  • the actuation of the mounting part is preferably carried out via an auxiliary winch.
  • the auxiliary winch is arranged on the first jib part, particularly preferably in the region of the point of articulation between the first jib part and crane tower. With the help of the winch, the mounting part can be drained and thus unfolding the boom parts can be effected.
  • the auxiliary winch is ideally equipped with a safety-related holding brake or alternatively with a locking device, whereby sufficient tension for the bracing of the crane boom is achieved during crane operation.
  • the use of an auxiliary winch with a holding brake allows the integration of a comparatively inexpensive monitoring electronics.
  • the holding brake, in particular disc brake may be sensor-monitored, which is less complex and less expensive than an expensive pawl construction or other mechanical protection.
  • the arrangement of the auxiliary winch is not necessarily on the first boom part.
  • the auxiliary winch can also be mounted on the second boom part, in particular in the region of the outer end of the boom part.
  • offers an external attachment of the auxiliary winch or the intake device of the mounting part for example on any crane component that is not attributable to the foldable crane boom. Possible would be the external mounting on the crane tower.
  • the mounting part is guided by the intake device in the direction of the first jib part, the arrangement of one or more deflection rollers is expedient.
  • the crane boom may further comprise a so-called neck bracing over which the boom is pulled into the operating position.
  • the neck bracing absorbs deadweight and payload loads on the crane boom.
  • the invention further relates to a crane, in particular a mobile construction crane, with a foldable boom according to the present invention or an advantageous embodiment of the present invention.
  • the crane obviously has the same advantages and properties as the crane boom according to the invention, which is why a repetitive description is omitted here.
  • the invention relates to the use of a jib mounting part for the bracing of a foldable crane jib during crane operation.
  • the boom mounting part is necessary for folding jibs for assembly or disassembly.
  • the mounting part was previously without function.
  • Essential to the invention is now that the boom mounting part is not relaxed during crane operation, but is used to brace at least one boom part and receives the attacking holding forces on the boom.
  • FIG. 1 has already been referred to in the introductory part of this specification. Repeating explanations of the figure are therefore not considered necessary in this part of the description.
  • FIG. 2 shows a simple embodiment of the crane boom. that is not part of the invention.
  • the crane jib comprises two jib parts 10, 20 connected to one another in an articulated manner.
  • the first jib part 10 is connected to the crane tower at the ends via the articulation points 30.
  • the middle support 40 is also pivotally mounted.
  • FIG. 2 shows the crane boom in the deployed state, ie during crane operation with horizontal boom position.
  • both jib parts 10, 20 can be folded around the articulated connection 12 against one another or folded together.
  • the mounting part 50 is provided, that is fixed at the fixed point 52 to the winch 70 at the end.
  • the mounting part 50 is guided starting from the auxiliary winch 70 via the top of the central support 40 and a cable deflection roller 60 provided thereon in the direction of the second boom part 20.
  • the open end of the mounting part 50 is fixed in the region of the boom tip of the second jib part 20 in the fixed point 51.
  • the winch 70 can release the mounting member 50 to spend the boom members 10, 20 in their horizontal position for crane operation.
  • the articulation of the boom parts 10, 20 is fixed for crane operation in the horizontal orientation.
  • the mounting member 50 is loaded during crane operation with a tensile stress, so that the attacking holding force on the boom is partially absorbed by the mounting member 50 in function of a bracing.
  • the variant of FIG. 1 can be omitted by the present invention, at least the elaborately constructed bracing 7.
  • FIG. 2 shows a mounted on the first boom part 10 winch 70. However, this can be fixed without restriction on the second boom part 20, in particular in the region of the second cable fix point 51. The second rope fixed point 51 would then be provided inversely on the first boom part 10.
  • the illustrated jib parts 10, 20 may be composed of one or more individual components.
  • the boom can have more than two boom parts include.
  • the central support 40 could be mounted on the first or second jib part 10, 20 instead of in the connecting joint 12.
  • auxiliary cables 80 which also contribute to the locking of the center support during crane operation in the illustrated vertical orientation.
  • auxiliary ropes 80 a number of alternative solutions for erecting and locking the center support 40 are available, which can be easily reconciled with the inventive concept of the present invention.
  • a safe threading of the mounting part 50 on the pulley 60 can by means of a construction in the form of a roping arm 100 according to FIG. 3b be achieved.
  • the Seilfangarm 100 comprises two obliquely upwardly from the pulley 60 extending walls 101, 102 which intersect in the region of the pulley 60 and form a V-shape.
  • the approximating by the Entfaltvorgang the pulley 60 rope 50 can be better captured by the Seilfangarm 100 and are securely threaded on the pulley 60 during further deflation of the boom parts 10, 20.
  • the middle support 40 is equipped with a telescopic mechanism as sketched in the Figure 3c is indicated. In this case, the pulley 60 can be tracked when unfolding the boom parts 10, 20 of the mounting part 50 so that it always remains in contact with the pulley 60.
  • the embodiment according to provides 3d figure at.
  • the center support 40 is equipped with a matching counter-roller 61 to the pulley 60.
  • the mounting member 50 remains threaded both during crane operation and during transport to the center support 40.
  • a disadvantage of this embodiment is that the necessary cable force for complete boom contractions increases because the lever arm L1 and L2 at the mounting end is very small (see FIG. 3e ).
  • the fixed point 51 of the mounting member 50 on the second boom part 20 is not on the boom top but on the underside of the boom.
  • the construction of the Figure 3c can - as shown - also include a counter-roller 61. However, the use of the counter-roll is optional and not mandatory.
  • FIG. 4 A somewhat more complex embodiment, which is not part of the invention, is the FIG. 4 refer to.
  • FIG. 4a shows the crane boom in almost completely folded state while FIG. 4b depicts the crane boom in the almost completely unfolded state.
  • the mounting part 50 is not fixed at the point 51 of the second crane arm part 20, instead it is guided back to the central support 40 via a deflection roller 53 and firmly fixed to the middle support 40 at the point 59 on the tip side.
  • two further deflection rollers 54, 55 are provided, wherein in each case a deflection roller on the first and second boom part 10, 20 with the smallest possible distance A1, A2 is secured to the central support 40.
  • the cable guide of the mounting part 50 extends from the fixed point 52 on the winch 70 in the direction of the first guide roller 54 and is guided by this to the pulley 60 at the central support. This deflects the mounting part in the direction of the second guide roller 55 of the second boom part 20. Starting from the guide roller 55, the mounting part runs parallel to the boom 20 in the direction of the outer guide roller 53, which leads the mounting member 50 back to the central support 40.
  • the crane boom can be pulled into the operating position.
  • the neck bracing 110 captures deadweight and payload loads on the crane boom.
  • the neck brace 110 includes deployable braces 111, 112 for receiving the bracing strand.
  • the bracing stranding is subdivided into a first bracing 114, which extends from the brace 112 in the direction of the deflection roller 54 and is struck on the first crane boom part 10.
  • the second brace 115 extends from the brace 112 toward the center support 40.
  • the crane may be extended with another boom segment 130 hinged to the outer end of the second boom member 20.
  • a further bracing stranding 117 is required, which would extend from the middle support 40 via a further support 116 to the further boom part 130.
  • the distances A1, A2 between the pulleys 54, 55 and the middle support 40 are usefully to choose as small as possible. As a rule, the distance depends on the middle column height.
  • the distances A1, A2 are expediently selected such that the cantilever center support 40 is pressed into the operating position during assembly of the cable pulley 60 and remains in this operating position with sufficient certainty.
  • the distances A1, A2 should be set so that the lever arm L1 and L2 remains sufficiently large in all assembly phases, especially during the assembly phase according to FIG. 4a ,
  • the distance A3 between the guide roller 53 and the center support 40 should be chosen as large as possible in order to reduce the resulting tether force during crane operation as much as possible.
  • the lever arm L3 is larger than the two lever arms L1, L2.
  • the Krakarm of the jib portion 20 is limited to a reasonable amount, in particular, a projection takes place beyond the tether, thereby minimizing boom steel weight.
  • the deflection rollers 55, 53 fixed to the boom part 20 could also be combined to form a single deflection roller.
  • this measure would lead to disadvantages in the Mittel Brinmontage or larger tether forces or a heavier boom steel.
  • FIG. 5 A final embodiment which is not part of the invention. is the FIG. 5 refer to.
  • the mounting member 50 between the middle support 40 and the guide roller 53 and between the guide rollers 54 and the center support 40 is reeved several times.
  • additional deflection rollers 62, 58 on the central support 40 and on the boom part 10 are necessary. It makes sense that the number of Seileinscherept between the fixed roller 54 on the boom part 10 and between the fixed roller 53 and the center support 40 is selected so that the mounting member 50 is similarly loaded in the crane assembly and crane operation. In addition, a multiple Amsterdamin réelle between the guide roller 55 and the central support 40 could be selected.
  • the open end of the rope is fixed at the fixed point 51 on the guy support 112 of the neck brace 110.
  • the attachment to the guy support 112 causes it during the Krandemontage by pulling the mounting member 50 is used on the crane boom 10.
  • the center support is no longer stored in the pivot point 12, but pivotally attached to the boom part 10.
  • the winch 70 is always attached to the first boom part 10.
  • the cable entry system used for the folding of the jib parts 10, 20 can also be mounted on any other crane component, for example on the crane tower 150.
  • the cable 50 is then usually fed via one or more additional pulleys in the region of the articulation point of the first boom folding part 10 at the crane tower.
  • the mounting part 50 of the embodiments is always pulled on one side over the winch 70, while the open end is firmly connected to one of the crane arm parts.
  • both ends of the rope can be pulled in or lowered via a cable retraction system.
  • FIGS. 2 to 4 illustrated embodiment with two boom folding parts 10, 20 does not necessarily begin at a crane tower.
  • the two folding parts 10, 20 can also be located in a middle or end-side boom section of a multi-part boom folding system.

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

Claims (12)

  1. Flèche de grue repliable pour une grue à tour, notamment une grue à partie tournante inférieure, comprenant au moins deux parties de flèche (10, 20) reliées entre elles de manière articulée, un haubanage de flèche ainsi qu'un câble de montage (50) pour le montage de la flèche,
    la flèche de grue dépliée pendant le fonctionnement de la grue avec la flèche horizontale étant haubanée au moins en partie au moyen du câble de montage (50), la flèche de gue présentant un support central (40) par l'intermédiaire duquel le câble de montage (50) est guidé de la première partie de flèche (10) vers au moins une deuxième partie de flèche (20) au moyen d'une poulie de câble (60) disposée au sommet ou au niveau du sommet du support central (40), le support central (40) étant logé de manière pivotante dans la liaison articulée (12) des parties de flèche (10, 20) reliées entre elles de manière articulée,
    caractérisée en ce
    que le support central (40) comprend un mécanisme télescopique.
  2. Flèche de grue repliable selon la revendication 1, caractérisée en ce qu'une contre-poulie (61) est ménagée pour le guidage du câble de montage (50) sur le support central (40).
  3. Flèche de grue repliable selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que la poulie de câble (60) du support central (40) présente un mécanisme récepteur de câble (100).
  4. Flèche de grue repliable selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'un ou plusieurs câbles auxiliaires (80) sont ménagés pour le redressement du support central (40).
  5. Flèche de grue repliable selon l'une quelconque des revendications précédentes, caractérisée en ce que le câble de montage de flèche (50) est fixé sur ou au niveau de l'extrémité extérieure de l'au moins deuxième partie de flèche (20) ou est dévié au moyen d'au moins une poulie de câble (53).
  6. Flèche de grue repliable selon la revendication 5, caractérisée en ce que le câble de montage (50) est passé une ou plusieurs fois entre le support central (40) et l'extrémité extérieure de l'au moins deuxième partie de flèche (20), le nombre de passages étant notamment sélectionné de manière à ce qu'une charge de câble similaire se règle pendant le montage de la grue et le fonctionnement de la grue.
  7. Flèche de grue repliable selon l'une quelconque des revendications précédentes, caractérisée en ce que le câble de montage (50) est dévié sur la première et/ou la deuxième parties de flèche (10, 20) au moyen d'au moins une poulie de renvoi (54, 55), l'au moins une poulie de renvoi (54, 55) étant de préférence disposée sur la partie de flèche (10, 20) à proximité du support central (40).
  8. Flèche de grue repliable selon la revendication 7, caractérisée en ce que le câble de montage (50) est passé plusieurs fois entre le support central (40) et l'au moins une poulie de renvoi (54, 55), le nombre de passages étant notamment sélectionné de manière à ce qu'une charge de câble similaire se règle pendant le montage de la grue et le fonctionnement de la grue.
  9. Flèche de grue repliable selon l'une quelconque des revendications précédentes, caractérisée en ce que le câble de montage (50) peut être contraint par l'intermédiaire d'un treuil auxiliaire muni de freins de retenue en version sécurisée et/ou d'un dispositif de blocage, le treuil auxiliaire étant de préférence disposé sur la première ou la deuxième partie de flèche (10, 20) ou sur un composant de la grue non associé à la flèche de grue.
  10. Flèche de grue repliable selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins un point terminal de câble de montage est fixé sur le treuil auxiliaire et/ou avec la première partie de flèche (10) et/ou avec la deuxième partie de flèche (20) et/ou sur le support central (40).
  11. Flèche de grue repliable selon l'une quelconque des revendications précédentes, caractérisée en ce que la flèche de grue présente un haubanage de nuque.
  12. Grue, notamment grue de construction mobile, comprenant une flèche repliable selon l'une quelconque des revendications précédentes.
EP14713038.9A 2013-04-09 2014-03-18 Flèche de grue repliable et grue Active EP2984024B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013006104.0A DE102013006104A1 (de) 2013-04-09 2013-04-09 Faltbarer Kranausleger und Kran
PCT/EP2014/000733 WO2014166581A1 (fr) 2013-04-09 2014-03-18 Flèche de grue repliable et grue

Publications (2)

Publication Number Publication Date
EP2984024A1 EP2984024A1 (fr) 2016-02-17
EP2984024B1 true EP2984024B1 (fr) 2018-05-09

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EP14713038.9A Active EP2984024B1 (fr) 2013-04-09 2014-03-18 Flèche de grue repliable et grue

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EP (1) EP2984024B1 (fr)
DE (1) DE102013006104A1 (fr)
WO (1) WO2014166581A1 (fr)

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JP2021169370A (ja) * 2020-04-16 2021-10-28 タダノ デマグ ゲーエムベーハーTadano Demag GmbH 車両クレーン及びそのジブへの荷重を低減する方法
WO2022008023A1 (fr) 2020-07-09 2022-01-13 Second Sun Aps Système de réflexion de la lumière vers le bas sur un champ

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DE29919790U1 (de) * 1999-09-17 2000-04-27 Liebherr-Werk Biberach GmbH, 88400 Biberach Turmdrehkran

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DE1173628B (de) * 1963-04-17 1964-07-09 Wsesojuznij Nii Str I Doroshno Turmdrehkran mit einem fuer den Transport zusammenlegbaren Ausleger
FR2303751A1 (fr) * 1975-03-14 1976-10-08 Noel Guy Dispositif de depliage d'une fleche d'une grue de chantier depliable
ES473431A1 (es) * 1978-09-16 1979-04-16 Pingon Int Perfeccionamientos introducidos en gruas plegables de monta-je rapido.
JPS58195625A (ja) * 1982-04-26 1983-11-14 Hitachi Constr Mach Co Ltd 作業機械のａフレ−ム
FR2548646B1 (fr) * 1983-07-05 1985-12-13 Cadillon Grue repliable a deploiement rapide
DD253351A3 (de) * 1985-12-10 1988-01-20 Schwermasch Kirow Veb K Stuetzeinrichtung fuer ausleger von kranen und baggern
EP0941958A1 (fr) * 1998-03-11 1999-09-15 Gru Dalbe S.r.l. Système pour réduire l'encombremant de la flèche d'une grue repliable
DE202007008990U1 (de) * 2007-06-27 2008-11-06 Liebherr-Werk Ehingen Gmbh Teleskopausleger eines Krans

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DE8013808U1 (de) * 1979-05-24 1980-09-04 San Marco S.P.A. Industrie Meccaniche, Borgomanero, Novara (Italien) Turmdrehkran mit teleskopartig ausfahrbarem turmgeruestoberteil
DE29919790U1 (de) * 1999-09-17 2000-04-27 Liebherr-Werk Biberach GmbH, 88400 Biberach Turmdrehkran

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DE102013006104A1 (de) 2014-10-09
EP2984024A1 (fr) 2016-02-17

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