EP3372549B1 - Gripper and traverse with at least one gripper - Google Patents

Gripper and traverse with at least one gripper Download PDF

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Publication number
EP3372549B1
EP3372549B1 EP18000233.9A EP18000233A EP3372549B1 EP 3372549 B1 EP3372549 B1 EP 3372549B1 EP 18000233 A EP18000233 A EP 18000233A EP 3372549 B1 EP3372549 B1 EP 3372549B1
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EP
European Patent Office
Prior art keywords
strut
gripper
support
mouth
vertical
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EP18000233.9A
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German (de)
French (fr)
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EP3372549A1 (en
Inventor
Boris Franke
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Spanset Axzion GmbH
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Spanset Axzion GmbH
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Publication of EP3372549A1 publication Critical patent/EP3372549A1/en
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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
    • 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
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • 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
    • B66C1/28—Duplicate, e.g. pivoted, members engaging the loads from two sides
    • 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
    • B66C1/108—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 for lifting parts of wind turbines
    • 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
    • B66C1/24—Single members engaging the loads from one side only
    • 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
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • B66C1/445—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces motor actuated

Definitions

  • the invention relates to a C-gripper for arrangement on a traverse or on a suspension element and a traverse with at least one such C-gripper for transporting items to be lifted, the height of the C-gripper being adjustable.
  • C grippers have been known for many years, including from EP 2 873 641 A1 .
  • the C-gripper disclosed there is one with a rigid structure.
  • a C-gripper is disclosed which can be dismantled into an upper part and a lower part.
  • This document shows a device suitable for handling items to be lifted, this device - in its assembled state - representing a "C gripper". It consists of an upper strut, a vertical strut and a support strut, on or on which the lifted item can be arranged, the upper strut and the vertical strut being rigidly connected to one another and the support strut (the lower part) being rotatably connected to the vertical strut.
  • the font US 6,379,104 B1 discloses a C-gripper suitable for handling items to be lifted.
  • This gripper consists of an upper strut, a vertical strut and a support strut, on or to which the lifted goods can be arranged, the upper strut and the vertical strut being rotatably connected to one another, the support strut being rigidly connected to the vertical strut and the vertical strut being telescopic.
  • the object of the invention is accordingly to provide a C-gripper or a traverse with at least one such C-gripper, wherein the gripper or the traverse can be reduced in its spatial volume or its usually rigid shape can be changed and the damage potential in the Corner areas of the vertical strut is reduced.
  • a C-gripper for handling an item to be lifted which is intended to be placed on a traverse or on a suspension element, for example a crane hook, consists of an upper strut, a vertical strut and a support strut, which forms a so-called hook base on which the The item to be lifted can be placed on, in which case, within the meaning of the invention, in addition to the placement as such, the item to be lifted can also be suspended from the support strut.
  • the items to be lifted are arranged on or on the support strut.
  • the top strut and the vertical strut are, as in conventional constructions, rigidly connected to one another and are arranged essentially at right angles to one another, other angles likewise being within the scope of the invention.
  • the support strut is not rigid, but rather rotatably mounted to the vertical strut in such a way that a clear dimension (h) of a mouth of the C-gripper can be changed, so it can be enlarged or reduced.
  • the vertical strut is also telescopic. It is designed as a telescopic strut.
  • the telescopic vertical strut is locked by means of a known holding device, for example at least one bolt per segment or similar holding devices. All devices that provide a functionally reliable locking can be considered.
  • the rotatably mounted support strut is locked, so the setting of the clear dimension (h) of the mouth and thus also the regulation of the rotary movement, by means of at least one pliable load means, which is moved relative to the vertical strut in the direction of the mouth of the C-gripper on the upper strut and the support strut is arranged in a functionally reliable manner.
  • the at least one pliable load means is displaced parallel to the vertical strut in the direction of the mouth of the C-gripper on the upper strut and the support strut in a functionally reliable manner.
  • the at least one pliable load means is, for example, a sling with rotatably mounted receptacles, such as rollers, on the upper strut and the support strut and can be changed in length, for example by means of winches, winches or other known suitable devices.
  • the shift takes place to the extent that it is structurally necessary. It can be varied according to the construction and the type of material being lifted.
  • the rotatably mounted support strut is advantageously connected at its own free end to a free end of the vertical strut.
  • the setting of the clear dimension (h) of the mouth is advantageously carried out in such a way that the support strut is arranged at a right angle to the telescopic strut.
  • other angular dimensions are also within the scope of the invention, provided that the functionality of the C-gripper is not impaired.
  • both the top strut, the vertical strut and the support strut in the context of the invention are not to be understood as just a single strut, but can also represent different struts or other structural arrangements. When considering the device as a whole, however, these each form an assembly that can be defined as an upper strut, vertical strut or support strut.
  • the device according to the invention can thus be changed with regard to the height of the C-gripper, so that an optimized transport is possible.
  • the telescopic vertical strut in the locked position only absorbs the compressive forces in use with the goods to be lifted, the tensile forces being absorbed by the at least one pliable load means.
  • This construction enables the vertical strut to be reduced in terms of its thickness and thus to save weight.
  • the corner areas of the vertical strut are less stressed by the construction according to the invention when the C-gripper is used, so that the potential for damage to these areas is reduced.
  • the support strut has several height-adjustable support segments for adaptation to the external geometry of the item to be lifted, such as a rotor blade or some other component of a wind power plant, which protrude into the mouth of the C-gripper.
  • the upper strut can furthermore have a known clamping device which is displaceable relative to the support element and which points into the mouth of the C-gripper in order to be able to lock the item to be lifted.
  • the clamping device itself is offset to the vertical strut in the direction of the mouth and to the at least one pliable load means on the upper strut and is displaceable in the direction of the support strut, so that in the locked position a force can be exerted on the item to be lifted that prevents or minimizes its slipping.
  • the at least one pliable load means is then also tensioned because, as already explained, it absorbs the tensile forces acting on the C-gripper, such as the support strut and the vertical strut.
  • the tension of the at least one pliable load means is given, as it were, if only the load is arranged with its own weight on or on the support strut and thus a tension of the at least one pliable load is caused due to the weight of the load.
  • the at least one pliable load means can also be removed and stowed.
  • the support traverse can then be locked using a rigid strut.
  • the invention also relates to a crossbeam, for example a beam crossbeam, for handling items to be lifted, the crossbeam having at least one above-described C gripper.
  • the traverse can also be arranged in a known manner like the C-gripper itself on one or more suspension elements of a crane-like hoist.
  • the traverse preferably has two C-grippers at their free ends, which are removable in order to be able to transport an elongated item to be lifted, such as a rotor blade of a wind turbine. Transporting elongated items to be lifted is also possible with the use of at least two C grippers.
  • a removability of the at least one C-gripper is advantageous if the traverse with the C-grippers according to the invention is to be dismantled in a conventional container.
  • it is composed of at least two mutually rotatably mounted segments that allow the crossbeam to be folded and thus reduce its length.
  • the at least two segments are preferably connected to one another in a rotatable manner on narrow sides.
  • a C-gripper 1 can be seen, which can be arranged on a cross member 11 .
  • the C-gripper 1 consists of an upper strut 2, a vertical strut 3 and a support strut 4.
  • the support strut 4 has several support segments 9 and forms a so-called hook base on which the item to be lifted 14 can be placed.
  • the top strut 2 and the vertical strut 3 are rigidly connected to one another as in conventional constructions and are arranged at right angles to one another.
  • the support strut 4 is not rigid, but rotatably connected to the vertical strut 3 in such a way that a clear dimension (h) of a mouth 5 of the C-gripper 1 can be changed, enlarged or reduced.
  • the support strut 4 is thus pivotable, which is shown in Fig. 2 is indicated by the arrows.
  • the vertical strut 3 can be telescoped, in the exemplary embodiment it can be telescoped twice.
  • the telescopic vertical strut 3 is locked by means of two holding devices 6, for example by means of a bolt per segment.
  • the rotatably mounted support strut is locked, so the setting of the clear dimension (h) of the mouth, by means of a pliable load means 7, which is moved relative to the vertical strut 3 in the direction of the mouth 5 of the C-gripper 1 on the upper strut 2 and the support strut 4 is posted by means of rotatable receptacles 8 .
  • the pliable load means 7 is displaced parallel to the vertical strut 3 in the direction of the mouth 5 of the C-gripper 1 on the upper strut 2 and the support strut 4 .
  • the flexible load means 7 is a loop and is arranged on rotatably mounted receptacles 8, namely rollers, on the top strut 2 and the support strut 4 . Its length can be changed.
  • the support strut and the vertical strut are arranged at right angles to one another in the exemplary embodiment.
  • the upper strut 2 has a known clamping device 10 which can be displaced relative to the support element 4 and points into the mouth 5 of the C-gripper 1 , in order to be able to lock the item 14 to be lifted.
  • the clamping device 10 itself is offset from the vertical strut 3 and the limp-load means 7 towards mouth 5 disposed on the upper beam 2 and can be displaced, so that a force can be in locking position on the hoisting strap 14 in the direction of the support rib 9 can be applied which prevents the same from slipping or minimized.
  • the pliable load means 7 is then also tensioned. It then absorbs the tensile forces acting on the C gripper 1, i.e.
  • the tension of the pliable load means 7 is given, as it were, if only the load 14 rests with its own weight on the support strut 4 and thus a tension of the pliable load means 7 is caused due to the weight of the load 14 , Fig. 1 .
  • the segments are arranged pivotably relative to one another on respective narrow sides 13 .
  • the traverse 11 has a C gripper 1 at each of its free ends. These are removable in order to be able to stow the traverse 11 with the C grippers 1 according to the invention in a conventional container.
  • the traverse 11 composed of the three segments 12 mounted rotatably with respect to one another can be folded. This ensures space-saving storage of the traverse.
  • the traverse 11 with its two C grippers 1 is suitable for the transport of elongated items to be lifted, such as tower segments or rotor blades of wind turbines.

Description

Die Erfindung betrifft einen C-Greifer zur Anordnung an eine Traverse oder an ein Tragmittel und eine Traverse mit mindestens einem solchen C-Greifer zum Transport von Hebegütern, wobei der C-Greifers in seiner Höhe verstellbar ist.The invention relates to a C-gripper for arrangement on a traverse or on a suspension element and a traverse with at least one such C-gripper for transporting items to be lifted, the height of the C-gripper being adjustable.

C-Greifer sind seit vielen Jahren bekannt, so u. a. aus der EP 2 873 641 A1 . Bei dem dort offenbarten C-Greifer handelt es sich um einen mit einem starren Aufbau. In der DE 10 2015 105 178 A1 ist ein C-Greifer offenbart, der in ein Oberteil und ein Unterteil zerlegbar ist. Diese Schrift zeigt eine Vorrichtung geeignet zur Handhabung eines Hebegutes, wobei diese Vorrichtung - in ihrem zusammengebauten Zustand - einen "C-Greifer" vorstellt. Sie besteht aus einer Oberstrebe, einer Vertikalstrebe und einer Auflagestrebe, auf oder an welche das Hebegut anordenbar ist, wobei die Oberstrebe und die Vertikalstrebe miteinander starr verbunden sind und die Auflagestrebe (das Aufnahmeunterteil) mit der Vertikalstrebe drehbar gelagert verbunden ist. Die Schrift US 6 379 104 B1 offenbart einen C-Greifer geeignet zur Handhabe eines Hebegutes. Dieser Greifer besteht aus einer Oberstrebe, einer Vertikalstrebe und einer Auflagestrebe, auf oder an welche das Hebegut anordenbar ist, wobei die Oberstrebe und die Vertikalstrebe rotierbar miteinander verbunden sind, die Auflagestrebe mit der Vertikalstrebe starr gelagert verbunden ist und die Vertikalstrebe teleskopierbar ist.C grippers have been known for many years, including from EP 2 873 641 A1 . The C-gripper disclosed there is one with a rigid structure. In the DE 10 2015 105 178 A1 a C-gripper is disclosed which can be dismantled into an upper part and a lower part. This document shows a device suitable for handling items to be lifted, this device - in its assembled state - representing a "C gripper". It consists of an upper strut, a vertical strut and a support strut, on or on which the lifted item can be arranged, the upper strut and the vertical strut being rigidly connected to one another and the support strut (the lower part) being rotatably connected to the vertical strut. The font US 6,379,104 B1 discloses a C-gripper suitable for handling items to be lifted. This gripper consists of an upper strut, a vertical strut and a support strut, on or to which the lifted goods can be arranged, the upper strut and the vertical strut being rotatably connected to one another, the support strut being rigidly connected to the vertical strut and the vertical strut being telescopic.

Dies hatte in der Vergangenheit zu Nachteilen beim Transport geführt. Derartige Greifer sind nämlich in der Regel nicht in einen üblichen Container verladbar, da es gerade bei einem Einsatz auf Schiffen, so beispielhaft bei der Montage von Off-Shore-Windkraftanlagen vorteilhaft ist, wenn dort ein solcher Greifer bzw. eine Traverse mit mindestens einem solchen Greifer eingesetzt werden soll. Bei herkömmlichen starren C-Greifern bzw. C-Elementen besteht darüber hinaus das Problem, dass die größten Belastungen und damit das höchste Schädigungspotenzial in Eckbereichen einer vertikalen Strebe, auch genannt Rücken, auftreten.In the past, this had led to disadvantages in terms of transport. Such grippers are generally not loadable in a conventional container, since it is particularly advantageous when used on ships, for example in the assembly of offshore wind turbines, if such a gripper or a traverse with at least one such Gripper is to be used. With conventional rigid C-grippers or C-elements there is also the problem that the greatest loads and thus the greatest damage potential occur in corner areas of a vertical strut, also called the back.

Die Aufgabe der Erfindung besteht demgemäß darin, einen C-Greifer bzw. eine Traverse mit mindestens einem solchen C-Greifer bereitzustellen, wobei der Greifer beziehungsweise die Traverse in ihrem Raumvolumen reduzierbar ist bzw. deren üblicherweise starre Form, veränderbar ist und das Schädigungspotenzial in den Eckbereichen der vertikalen Strebe reduziert ist.The object of the invention is accordingly to provide a C-gripper or a traverse with at least one such C-gripper, wherein the gripper or the traverse can be reduced in its spatial volume or its usually rigid shape can be changed and the damage potential in the Corner areas of the vertical strut is reduced.

Die Aufgabe wird erfindungsgemäß durch einen C-Greifer gemäß dem Hauptanspruch 1 und einer Traverse mit mindestens einem solchen C-Greifer gemäß dem unabhängigen Anspruch 9 gelöst. Die abhängigen Unteransprüche beinhalten nähere Ausgestaltungen der Erfindung.The object is achieved according to the invention by a C-gripper according to main claim 1 and a crossbeam with at least one such C-gripper according to independent claim 9. The dependent subclaims contain more detailed developments of the invention.

Danach besteht ein C-Greifer zur Handhabe eines Hebegutes, der zur Anordnung an eine Traverse oder an ein Tragmittel, so beispielhaft einen Kranhaken, bestimmt ist, aus einer Oberstrebe, einer Vertikalstrebe und einer Auflagestrebe, welche einen so genannten Hakengrund bildet, auf welche das Hebegut auflegbar ist, wobei Auflegen im Sinne der Erfindung neben dem Auflegen als solches auch eine hängende Lagerung des Hebeguts an der Auflagestrebe sein kann. Das Hebegut wird insofern auf oder an der Auflagestrebe angeordnet. Die Oberstrebe und die Vertikalstrebe sind, wie bei herkömmlichen Konstruktionen, miteinander starr verbunden und im Wesentlichen rechtwinklig zueinander angeordnet, wobei andere Winkel ebenfalls im Rahmen der Erfindung liegen. Die Auflagestrebe ist aber nicht starr, sondern vielmehr drehbar gelagert mit der Vertikalstrebe verbunden und zwar derart, dass ein lichtes Maß (h) eines Mauls des C-Greifers veränderbar, so vergrößerbar oder auch verkleinerbar ist. Des Weiteren ist die die Vertikalstrebe teleskopierbar. Sie ist so als eine Teleskopstrebe ausgebildet.According to this, a C-gripper for handling an item to be lifted, which is intended to be placed on a traverse or on a suspension element, for example a crane hook, consists of an upper strut, a vertical strut and a support strut, which forms a so-called hook base on which the The item to be lifted can be placed on, in which case, within the meaning of the invention, in addition to the placement as such, the item to be lifted can also be suspended from the support strut. The items to be lifted are arranged on or on the support strut. The top strut and the vertical strut are, as in conventional constructions, rigidly connected to one another and are arranged essentially at right angles to one another, other angles likewise being within the scope of the invention. The support strut is not rigid, but rather rotatably mounted to the vertical strut in such a way that a clear dimension (h) of a mouth of the C-gripper can be changed, so it can be enlarged or reduced. The vertical strut is also telescopic. It is designed as a telescopic strut.

Die Arretierung der teleskopierbaren Vertikalstrebe erfolgt mittels einer bekannten Haltevorrichtung, so beispielhaft durch mindestens einen Bolzen je Segment oder ähnliche Haltevorrichtungen. Es kommen alle Vorrichtungen in Betracht, welche eine funktionssichere Arretierung gewähren. Erfindungsgemäß erfolgt die Arretierung der drehbar gelagerten Auflagestrebe, so die Einstellung des lichten Maßes (h) des Mauls und damit auch die Regulierung der Drehbewegung, mittels mindestens eines biegeschlaffen Lastmittels, welches relativ zur Vertikalstrebe in Richtung des Mauls des C-Greifers verschoben an der Oberstrebe und der Auflagestrebe funktionssicher angeordnet ist. Vorzugsweise ist das mindestens eine biegeschlaffe Lastmittel parallel verschoben zur Vertikalstrebe in Richtung Maul des C-Greifers an der Oberstrebe und der Auflagestrebe funktionssicher angeordnet. Das mindestens eine biegeschlaffe Lastmittel ist beispielhaft eine Schlinge mit drehbar gelagerten Aufnahmen, so beispielhaft Rollen, an der Oberstrebe und der Auflagestrebe und in seiner Länge veränderbar, so beispielhaft mittels Winden, Winschen oder anderer bekannter geeigneter Vorrichtungen.The telescopic vertical strut is locked by means of a known holding device, for example at least one bolt per segment or similar holding devices. All devices that provide a functionally reliable locking can be considered. According to the invention, the rotatably mounted support strut is locked, so the setting of the clear dimension (h) of the mouth and thus also the regulation of the rotary movement, by means of at least one pliable load means, which is moved relative to the vertical strut in the direction of the mouth of the C-gripper on the upper strut and the support strut is arranged in a functionally reliable manner. Preferably, the at least one pliable load means is displaced parallel to the vertical strut in the direction of the mouth of the C-gripper on the upper strut and the support strut in a functionally reliable manner. The at least one pliable load means is, for example, a sling with rotatably mounted receptacles, such as rollers, on the upper strut and the support strut and can be changed in length, for example by means of winches, winches or other known suitable devices.

Die Verschiebung erfolgt in dem Umfang, wie es konstruktiv erforderlich ist. Sie kann variabel entsprechend der Konstruktion und der Art des Hebeguts erfolgen.The shift takes place to the extent that it is structurally necessary. It can be varied according to the construction and the type of material being lifted.

Vorteilhafterweise ist die drehbar gelagerte Auflagestrebe an einem eigenen freien Ende mit einem freien Ende der Vertikalstrebe verbunden. Die Einstellung des lichten Maßes (h) des Mauls erfolgt vorteilhafterweise derart, dass die Auflagestrebe in einem rechten Winkel zur Teleskopstrebe angeordnet ist. Es sind jedoch auch andere Winkelmaße im Bereich der Erfindung gelegen, soweit die Funktionsfähigkeit des C-Greifers nicht beeinträchtigt ist.The rotatably mounted support strut is advantageously connected at its own free end to a free end of the vertical strut. The setting of the clear dimension (h) of the mouth is advantageously carried out in such a way that the support strut is arranged at a right angle to the telescopic strut. However, other angular dimensions are also within the scope of the invention, provided that the functionality of the C-gripper is not impaired.

Zu beachten ist ergänzend, dass sowohl die Oberstrebe, die Vertikalstrebe, als auch die Auflagestrebe im Sinne der Erfindung nicht nur als eine einzige Strebe zu verstehen sind, sondern auch verschiedene Streben oder sonstige konstruktive Anordnungen darstellen können. Diese bilden jedoch bei der Gesamtbetrachtung der Vorrichtung jeweils eine Baugruppe, die entsprechend als Oberstrebe, Vertikalstrebe oder Auflagestrebe definiert werden kann.It should also be noted that both the top strut, the vertical strut and the support strut in the context of the invention are not to be understood as just a single strut, but can also represent different struts or other structural arrangements. When considering the device as a whole, however, these each form an assembly that can be defined as an upper strut, vertical strut or support strut.

Die erfindungsgemäße Vorrichtung ist somit hinsichtlich der Höhe des C-Greifers veränderbar, sodass ein optimierter Transport möglich ist. Darüber hinaus nimmt die teleskopierbare Vertikalstrebe in Arretierstellung im Einsatz mit dem Hebegut lediglich die Druckkräfte auf, wobei die Zugkräfte von dem mindestens einen biegeschlaffen Lastmittel aufgenommen werden. Diese Konstruktion ermöglicht, die Vertikalstrebe hinsichtlich ihrer Mächtigkeit zu reduzieren und somit Gewicht einzusparen. Darüber hinaus werden die Eckbereiche der Vertikalstrebe durch die erfindungsgemäße Konstruktion bei dem Einsatz des C-Greifers weniger stark belastet, sodass gleichsam das Schädigungspotenzial dieser Bereiche reduziert ist.The device according to the invention can thus be changed with regard to the height of the C-gripper, so that an optimized transport is possible. In addition, the telescopic vertical strut in the locked position only absorbs the compressive forces in use with the goods to be lifted, the tensile forces being absorbed by the at least one pliable load means. This construction enables the vertical strut to be reduced in terms of its thickness and thus to save weight. In addition, the corner areas of the vertical strut are less stressed by the construction according to the invention when the C-gripper is used, so that the potential for damage to these areas is reduced.

In weiterer Ausgestaltung weist die Auflagestrebe mehrere höhenverstellbare Auflagesegmente zur Anpassung an die äußere Geometrie des Hebegutes, so eines Rotorblattes oder eines sonstigen Bauteils einer Windkraftanlage auf, welche in das Maul des C-Greifers hineinragen.In a further embodiment, the support strut has several height-adjustable support segments for adaptation to the external geometry of the item to be lifted, such as a rotor blade or some other component of a wind power plant, which protrude into the mouth of the C-gripper.

Die Oberstrebe kann weiter eine bekannte, relativ zum Auflageelement verschiebbare und in das Maul des C-Greifers weisende Klemmvorrichtung aufweisen, um das Hebegut arretieren zu können. Die Klemmvorrichtung selbst ist versetzt zur Vertikalstrebe in Richtung des Mauls und zu dem mindestens einen biegeschlaffen Lastmittel an der Oberstrebe angeordnet und in Richtung Auflagestrebe verschiebbar, sodass in Arretierstellung auf das Hebegut eine Kraft ausgeübt werden kann, die ein Verrutschen desselben verhindert bzw. minimiert. Im Einsatz in der Arretierstellung wird sodann auch das mindestens eine biegeschlaffe Lastmittel gespannt, weil dieses, wie bereits dargelegt, die auf den C-Greifer, so die Auflagestrebe und die Vertikalstrebe, wirkenden Zugkräfte aufnimmt. Die Spannung des mindestens einen biegeschlaffen Lastmittels ist jedoch gleichsam dann gegeben, wenn lediglich das Hebegut mit seinem Eigengewicht auf oder an der Auflagestrebe angeordnet ist und somit eine Spannung des mindestens einen biegeschlaffen Lastmittels aufgrund des Eigengewichts des Hebeguts hervorgerufen wird.The upper strut can furthermore have a known clamping device which is displaceable relative to the support element and which points into the mouth of the C-gripper in order to be able to lock the item to be lifted. The clamping device itself is offset to the vertical strut in the direction of the mouth and to the at least one pliable load means on the upper strut and is displaceable in the direction of the support strut, so that in the locked position a force can be exerted on the item to be lifted that prevents or minimizes its slipping. In use in the locking position, the at least one pliable load means is then also tensioned because, as already explained, it absorbs the tensile forces acting on the C-gripper, such as the support strut and the vertical strut. The tension of the at least one pliable load means is given, as it were, if only the load is arranged with its own weight on or on the support strut and thus a tension of the at least one pliable load is caused due to the weight of the load.

In einem zusammengeschobenen Zustand des C-Greifers kann zudem das mindestens eine biegeschlaffe Lastmittel abgenommen und verstaut werden. Die Arretierung der Auflagetraverse kann dann mittels einer starren Strebe erfolgen.In a pushed together state of the C-gripper, the at least one pliable load means can also be removed and stowed. The support traverse can then be locked using a rigid strut.

Ebenfalls betrifft die Erfindung eine Traverse, so beispielhaft eine Balkentraverse, zur Handhabe eines Hebegutes, wobei die Traverse mindestens einen vorbeschriebenen C-Greifer aufweist. Die Traverse ist ebenfalls in bekannter Art wie der C-Greifer selbst an ein oder mehrere Tragmittel eines kranartigen Hebezeugs anordenbar. Vorzugsweise weist die Traverse zwei C-Greifer an ihren freien Enden auf, welche abnehmbar sind, um ein lang gestrecktes Hebegut, so ein Rotorblatt einer Windkraftanlage, transportieren zu können. Ein Transport lang gestreckter Hebegüter ist gleichsam bei einem Einsatz von mindestens zwei C-Greifern möglich.The invention also relates to a crossbeam, for example a beam crossbeam, for handling items to be lifted, the crossbeam having at least one above-described C gripper. The traverse can also be arranged in a known manner like the C-gripper itself on one or more suspension elements of a crane-like hoist. The traverse preferably has two C-grippers at their free ends, which are removable in order to be able to transport an elongated item to be lifted, such as a rotor blade of a wind turbine. Transporting elongated items to be lifted is also possible with the use of at least two C grippers.

Eine Abnehmbarkeit des mindestens einen C-Greifers ist dann vorteilhaft, wenn die Traverse mit den erfindungsgemäßen C-Greifern demontiert in einen üblichen Container zu verbringen ist. In einem solchen Fall ist sie aus mindestens zwei zueinander drehbar gelagerten Segmenten zusammensetzt, die es erlauben, die Traverse zu falten und so ihre Länge zu verringern. Vorzugsweise sind die mindestens zwei Segmente an Schmalseiten jeweils miteinander drehbar gelagert verbunden.A removability of the at least one C-gripper is advantageous if the traverse with the C-grippers according to the invention is to be dismantled in a conventional container. In such a case, it is composed of at least two mutually rotatably mounted segments that allow the crossbeam to be folded and thus reduce its length. The at least two segments are preferably connected to one another in a rotatable manner on narrow sides.

Die Faltbarkeit bzw. Demontagemöglichkeit von Traverse und dem mindestens einen C-Greifer, vorzugsweise zwei C-Greifern, einschließlich der Möglichkeit, die Höhe des mindestens einen C-Greifers zu verringern, erlaubt einen Transport der Vorrichtung, bei welcher das von ihr eingenommene Raumvolumen reduziert werden kann. Dies gewährleistet Transportvorteile, die sich nicht zuletzt auch in einer Reduzierung von Transportkosten niederschlagen.The ability to fold or dismantle the cross member and the at least one C-gripper, preferably two C-grippers, including the possibility of reducing the height of the at least one C-gripper, allows the device to be transported in which the space it occupies is reduced can be. This guarantees transport advantages, which are not least reflected in a reduction in transport costs.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Figuren weiter erläutert. Dabei ergeben sich weitere Vorteile, Merkmale und Ausgestaltungen der Erfindung.The invention is explained in more detail below using an exemplary embodiment with reference to the figures. This results in further advantages, features and embodiments of the invention.

Es zeigen:

  • Fig. 1 einen erfindungsgemäßen C-Greifer in Schrägperspektive mit einem Hebegut in Offenstellung,
  • Fig. 2 einen erfindungsgemäßen C-Greifer in Seitenansicht mit einem Hebegut in Arretierstellung,
  • Fig. 3 einen erfindungsgemäßen C-Greifer in Seitenansicht, teleskopiert in einer Transportposition,
  • Fig. 4 eine erfindungsgemäße Traverse mit zwei randseitig angeordneten C-Greifern in Schrägperspektive.
Show it:
  • Fig. 1 a C-gripper according to the invention in an oblique perspective with a load in the open position,
  • Fig. 2 a C-gripper according to the invention in side view with a load in the locked position,
  • Fig. 3 a C-gripper according to the invention in side view, telescoped in a transport position,
  • Fig. 4 a traverse according to the invention with two C-grippers arranged at the edge in an oblique perspective.

In Fig. 1 ist ein C-Greifer 1 ersichtlich, welcher an eine Traverse 11 anordenbar ist. Der C-Greifer 1 besteht aus einer Oberstrebe 2, einer Vertikalstrebe 3 und einer Auflagestrebe 4. Die Auflagestrebe 4 besitzt mehrere Auflagesegmente 9 und bildet einen so genannten Hakengrund, auf welchen das Hebegut 14 auflegbar ist. Die Oberstrebe 2 und die Vertikalstrebe 3 sind wie bei herkömmlichen Konstruktionen miteinander starr verbunden und sind rechtwinklig zueinander angeordnet. Die Auflagestrebe 4 ist nicht starr, sondern drehbar gelagert mit der Vertikalstrebe 3 verbunden und zwar derart, dass ein lichtes Maß (h) eines Mauls 5 des C-Greifers 1 veränderbar, so vergrößerbar oder auch verkleinerbar ist. Die Auflagestrebe, 4 ist somit schwenkbar, was in Fig. 2 durch die Pfeile gekennzeichnet ist. Des Weiteren ist die Vertikalstrebe 3 teleskopierbar, im Ausführungsbeispiel zweifach teleskopierbar.In Fig. 1 a C-gripper 1 can be seen, which can be arranged on a cross member 11 . The C-gripper 1 consists of an upper strut 2, a vertical strut 3 and a support strut 4. The support strut 4 has several support segments 9 and forms a so-called hook base on which the item to be lifted 14 can be placed. The top strut 2 and the vertical strut 3 are rigidly connected to one another as in conventional constructions and are arranged at right angles to one another. The support strut 4 is not rigid, but rotatably connected to the vertical strut 3 in such a way that a clear dimension (h) of a mouth 5 of the C-gripper 1 can be changed, enlarged or reduced. The support strut 4 is thus pivotable, which is shown in Fig. 2 is indicated by the arrows. Furthermore, the vertical strut 3 can be telescoped, in the exemplary embodiment it can be telescoped twice.

Die Arretierung der teleskopierbaren Vertikalstrebe 3 erfolgt mittels zweier Haltevorrichtungen 6, so durch einen Bolzen je Segment. Erfindungsgemäß erfolgt die Arretierung der drehbar gelagerten Auflagestrebe, so die Einstellung des lichten Maßes (h) des Mauls, mittels eines biegeschlaffen Lastmittels 7, welches relativ zur Vertikalstrebe 3 in Richtung des Mauls 5 des C-Greifers 1 verschoben an der Oberstrebe 2 und der Auflagestrebe 4 mittels drehbarer Aufnahmen 8 angeschlagen ist. Das biegeschlaffe Lastmittel 7 ist dabei parallel verschoben zur Vertikalstrebe 3 in Richtung des Mauls 5 des C-Greifers 1 an der Oberstrebe 2 und der Auflagestrebe 4 angeschlagen. Das biegeschlaffe Lastmittel 7 ist im Ausführungsbeispiel eine Schlinge und an drehbar gelagerten Aufnahmen 8, nämlich Rollen, an der Oberstrebe 2 und der Auflagestrebe 4 angeordnet. Es ist in seiner Länge veränderbar. Auflagestrebe und Vertikalstrebe sind jedoch in Ausführungsbeispiel in einem rechten Winkel zueinander angeordnet.The telescopic vertical strut 3 is locked by means of two holding devices 6, for example by means of a bolt per segment. According to the invention, the rotatably mounted support strut is locked, so the setting of the clear dimension (h) of the mouth, by means of a pliable load means 7, which is moved relative to the vertical strut 3 in the direction of the mouth 5 of the C-gripper 1 on the upper strut 2 and the support strut 4 is posted by means of rotatable receptacles 8 . The pliable load means 7 is displaced parallel to the vertical strut 3 in the direction of the mouth 5 of the C-gripper 1 on the upper strut 2 and the support strut 4 . In the exemplary embodiment, the flexible load means 7 is a loop and is arranged on rotatably mounted receptacles 8, namely rollers, on the top strut 2 and the support strut 4 . Its length can be changed. However, the support strut and the vertical strut are arranged at right angles to one another in the exemplary embodiment.

Die Oberstrebe 2 weist eine bekannte relativ zum Auflageelement 4 verschiebbare und in das Maul 5 des C-Greifers 1 weisende Klemmvorrichtung 10 auf, um das Hebegut 14 arretieren zu können. Die Klemmvorrichtung 10 selbst ist versetzt zur Vertikalstrebe 3 und zu dem biegeschlaffen Lastmittel 7 in Richtung Maul 5 an der Oberstrebe 2 angeordnet und in Richtung der Auflagestrebe 9 verschiebbar, sodass in Arretierstellung auf das Hebegut 14 eine Kraft ausgeübt werden kann, die ein Verrutschen desselben verhindert beziehungsweise minimiert. Im Einsatz in der Arretierstellung wird sodann ebenfalls das biegeschlaffe Lastmittel 7 gespannt. Es nimmt dann die auf den C-Greifer 1, so die Auflagestrebe 4 und die Vertikalstrebe 3, wirkenden Zugkräfte auf, Fig. 2 . Die Spannung des biegeschlaffen Lastmittels 7 ist jedoch gleichsam gegeben, wenn lediglich das Hebegut 14 mit seinem Eigengewicht auf der Auflagestrebe 4 aufliegt und somit eine Spannung des biegeschlaffen Lastmittels 7 aufgrund des Eigengewichts des Hebeguts 14 hervorgerufen wird, Fig. 1 . The upper strut 2 has a known clamping device 10 which can be displaced relative to the support element 4 and points into the mouth 5 of the C-gripper 1 , in order to be able to lock the item 14 to be lifted. The clamping device 10 itself is offset from the vertical strut 3 and the limp-load means 7 towards mouth 5 disposed on the upper beam 2 and can be displaced, so that a force can be in locking position on the hoisting strap 14 in the direction of the support rib 9 can be applied which prevents the same from slipping or minimized. In use in the locked position, the pliable load means 7 is then also tensioned. It then absorbs the tensile forces acting on the C gripper 1, i.e. the support strut 4 and the vertical strut 3 , Fig. 2 . The tension of the pliable load means 7 is given, as it were, if only the load 14 rests with its own weight on the support strut 4 and thus a tension of the pliable load means 7 is caused due to the weight of the load 14 , Fig. 1 .

In einem Volumen minimierten Zustand des C-Greifers 1 sind Elemente der Vertikalstrebe 3 zusammengeschoben. Zudem ist das biegeschlaffe Lastmittel 7 abgenommen. Die Arretierung der Auflagetraverse erfolgt dann mittels einer starren Strebe 15, Fig. 3 . In a volume-minimized state of the C-gripper 1 , elements of the vertical strut 3 are pushed together. In addition, the limp load means 7 has been removed. The support traverse is then locked by means of a rigid strut 15, Fig. 3 .

In Fig. 4 ist eine Traverse 11, bestehend aus drei Segmenten 12, abgebildet, die über Hebebänder an ein Tragmittel eines Krans zur Handhabe eines Rotorblattes einer Windkraftanlage angeordnet ist. Die Segmente sind zueinander an jeweiligen Schmalseiten 13 schwenkbar angeordnet. Die Traverse 11 weist an ihren freien Enden jeweils einen C-Greifer 1 auf. Diese sind abnehmbar, um die Traverse 11 mit den erfindungsgemäßen C-Greifern 1 in einen üblichen Container verstauen zu können. In einem solchen Fall ist die aus den drei zueinander drehbar gelagerten Segmenten 12 zusammengesetzte Traverse 11 faltbar. So ist eine Platz sparende Lagerung der Traverse gewährleistet. Die Traverse 11 mit ihren zwei C-Greifern 1 ist für den Transport von lang gestreckten Hebegütern, so etwa Turmsegmenten oder Rotorblättern von Windkraftanlagen geeignet.In Fig. 4 a traverse 11, consisting of three segments 12, is shown, which is arranged via lifting straps on a suspension element of a crane for handling a rotor blade of a wind turbine. The segments are arranged pivotably relative to one another on respective narrow sides 13 . The traverse 11 has a C gripper 1 at each of its free ends. These are removable in order to be able to stow the traverse 11 with the C grippers 1 according to the invention in a conventional container. In such a case, the traverse 11 composed of the three segments 12 mounted rotatably with respect to one another can be folded. This ensures space-saving storage of the traverse. The traverse 11 with its two C grippers 1 is suitable for the transport of elongated items to be lifted, such as tower segments or rotor blades of wind turbines.

Bezugszeichenliste:List of reference symbols:

1.1.
C-GreiferC gripper
2.2.
OberstrebeTop strut
3.3.
VertikalstrebeVertical strut
4.4th
AuflagestrebeSupport strut
5.5.
MaulMouth
6.6th
HaltevorrichtungHolding device
7.7th
biegeschlaffe Lastmittelpliable load means
8.8th.
AufnahmenRecordings
9.9.
AuflagesegmenteSupport segments
10.10.
KlemmvorrichtungClamping device
11.11.
Traversetraverse
12.12.
SegmenteSegments
13.13.
SchmalseitenNarrow sides
14.14th
HebegutLifted goods
15.15th
Strebestrut

Claims (12)

  1. A C-gripper (1) for handling a load (14), consisting of
    - an upper strut (2), a vertical strut (3) and a support strut (4), on or at which the load (14) can be arranged, wherein
    - the upper strut (2) and the vertical strut (3) are rigidly connected to one another,
    - the support strut (4) is connected in a rotatably mounted manner to the vertical strut (3), so that a clear dimension (h) of a mouth (5) of the C-gripper (1) can be modified,
    - the vertical strut (3) is telescopable,
    - the telescopable vertical strut (3) is locked by means of a holding device (6), and
    - the rotatably mounted support strut (4) is locked by means of at least one non-rigid loading means (7) which, displaced relative to the vertical strut (3) in the direction of the mouth (5) of the C-gripper (1), is arranged at the upper strut (2) and the support strut (4) .
  2. The C-gripper (1) according to Claim 1, wherein the at least one non-rigid loading means (7), displaced parallel to the vertical strut (3) in the direction of the mouth (5) of the C-gripper (1), is arranged at the upper strut (2) and the support strut (4).
  3. The C-gripper (1) according to Claim 1 or 2, wherein the at least one non-rigid loading means (7) is a sling having rotatably mounted receptacles (8) at the upper strut (2) and the support strut (4).
  4. The C-gripper (1) according to any one of the preceding claims, wherein the length of the at least one non-rigid loading means (7) is adjustable.
  5. The C-gripper (1) according to any one of the preceding claims, wherein the support strut (4) is arranged at a right angle to the telescopic strut (3).
  6. The C-gripper (1) according to any one of the preceding claims, wherein the support strut (4) has multiple height-adjustable support segments (9) in order to adapt to the outer geometry of the load (14), which support segments extend into the mouth (5) of the C-gripper (1).
  7. The C-gripper (1) according to any one of the preceding claims, wherein the upper strut (2) has a clamping device (10) which can be displaced relative to the support strut (4) and which points into the mouth (5) of the C-gripper (1) in order to lock the load (14).
  8. The C-gripper (1) according to Claim 7, wherein the clamping device (10) is arranged offset to the vertical strut (3) in the direction of the mouth (5) and to the at least one non-rigid loading means (7) at the upper strut (2), and can be displaced in the direction of the support strut (4).
  9. A cross-member (11) for handling a load, wherein the cross-member (11) has at least one C-gripper (1) according to any one of Claims 1 to 8.
  10. The cross-member (11) according to Claim 9, wherein the cross-member (11) has two C-grippers (1) at its free ends.
  11. The cross-member (11) according to Claim 9 or 10, wherein the cross-member (11) is composed of at least two segments (12) which are rotatably mounted with respect to one another.
  12. The cross-member (11) according to Claim 11, wherein the at least two segments (12) are each connected to one another in a rotatably mounted manner at narrow sides (13) and can consequently be folded.
EP18000233.9A 2017-03-08 2018-03-06 Gripper and traverse with at least one gripper Active EP3372549B1 (en)

Applications Claiming Priority (1)

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DE102017002138.4A DE102017002138B4 (en) 2017-03-08 2017-03-08 Gripper and crossbeam with at least one gripper

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EP3372549A1 EP3372549A1 (en) 2018-09-12
EP3372549B1 true EP3372549B1 (en) 2020-10-07

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US (1) US10259690B2 (en)
EP (1) EP3372549B1 (en)
CN (1) CN108569620B (en)
DE (1) DE102017002138B4 (en)
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ES (1) ES2842873T3 (en)

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US20180257914A1 (en) 2018-09-13
EP3372549A1 (en) 2018-09-12
US10259690B2 (en) 2019-04-16
CN108569620B (en) 2021-02-23
DK3372549T3 (en) 2021-01-04
CN108569620A (en) 2018-09-25
DE102017002138B4 (en) 2019-02-28
DE102017002138A1 (en) 2018-09-13
ES2842873T3 (en) 2021-07-15

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