EP2100843B1 - Crane with telescopic tower - Google Patents

Crane with telescopic tower Download PDF

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Publication number
EP2100843B1
EP2100843B1 EP09003429A EP09003429A EP2100843B1 EP 2100843 B1 EP2100843 B1 EP 2100843B1 EP 09003429 A EP09003429 A EP 09003429A EP 09003429 A EP09003429 A EP 09003429A EP 2100843 B1 EP2100843 B1 EP 2100843B1
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EP
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Prior art keywords
tower part
tower
crane
central
crane according
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EP09003429A
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German (de)
French (fr)
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EP2100843A1 (en
Inventor
Frank Burgdorf
Kurt Rücker
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KSD Kransysteme GmbH
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KSD Kransysteme GmbH
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    • 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
    • B66C23/28—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 constructed to operate at successively higher levels
    • B66C23/30—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 constructed to operate at successively higher levels with frameworks composed of telescopic elements
    • 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

Definitions

  • the present invention relates to a crane with a tower composed of a plurality of telescopically guided tower parts according to the preamble of claim 1. Furthermore, the present invention also relates to a method for extending the tower of such a crane.
  • the tower consists of at least two telescopically movable tower parts.
  • the tower part with the largest receiving cross-section is referred to here as the outer part and in the erected state forms the base of the tower, while the guided in the outer part of the inner part is moved with a telescoping mechanism in the outer part until the intended operating position.
  • the outer part is increased by mounting an extension before the inner part is hoisted up with the same telescoping mechanism in a higher operating position.
  • the crane is provided with a Aufstockvorraum, which is referred to as a telescopic cage.
  • a telescopic cage In the telescoping cage, a lifting and guiding system is integrated, with the separation of the tower, an upper tower part is completely raised by a gap, so that laterally an additional tower element can be introduced.
  • a horizontal Schlenk system is also provided on Teleskopierkarfig.
  • the telescopic tower of a fast-erecting crane is usually in two parts and consists of AuBenturm and inner tower, the inner tower in the outer tower telescopically displaced and fully retracted in the road transport position in the outer tower to the maximum allowable road transport dimensions of a trailer with a load of 20.75 m in length, 2.55 m width and 4 m height according to ⁇ 22 StVO not to be exceeded.
  • the consequence of this is that fast-erecting cranes with an outer and an inner tower in vollteleskopierter operating position a hook height of 28 m usually do not exceed, due to the resulting from the road transport limitation of the lengths of the single tower parts.
  • Object of the present invention is therefore to provide a crane according to the preamble of claim 1, which allows in a simple manner to achieve a further operating position with increased load hook height.
  • the crane according to the invention has an additional third tower part, which is also referred to below as the middle tower part.
  • the three tower parts are guided into each other and have a preferably rectangular cross-section with a free Internal cross-section.
  • the middle part of the tower has a free inner cross section, which is larger than the outer dimensions of the other two tower parts, so that it surrounds them in cross section.
  • this middle tower part acts as a sleeve that connects the lower tower part and upper tower part and thus provides an additional working height of about 8 m, without the additional third tower part also additional assembly technology, for example in the form of a separate Teleskopierantriebs with connected transmission means, would have to be added in the crane tower.
  • the advantage of the present invention is therefore that an additional operating position with increased load hook height for a crane with telescopic tower is provided by an additional third tower part is integrated into the tower, which only requires a negligible additional space in the fully einteleskop elected transport state of the crane.
  • this third tower part of the tower but not in a known manner three telescopically telescoping vertical structure.
  • the extension of the middle and the upper tower part would first from the stationary lower tower part and then turn the extension of the upper from the middle tower part each have their own Teleskopierantrieb with associated transmission means, for example in the form of Seilflaschenzugsystemen, for the middle tower part and separately required for the upper tower section.
  • Teleskopierantrieb with associated transmission means for example in the form of Seilflaschenzugsystemen
  • such a triple telescoping crane would only increase significantly Manufacturing costs and also be realized only with an additional increase in weight and volume because of the addition to be integrated mounting technology.
  • the third, middle tower part designed such that the crane reaches an additional operating position with increased load hook height, while continuing to make do only with the known mounting technique of a conventional double-telescopic tower.
  • the extension of the upper part of the tower continues to be carried out with the known assembly technique - preferably via a montageseil pulley system - as in the conventional double telescopic crane tower, with the only difference that the upper part of the tower is not extended from the lower but from the middle part of the tower ,
  • the upper part of the middle part of the tower in the crane according to the invention is constructed in the same way as the upper part of the lower part of the tower of a conventional double telescopic crane tower.
  • This matching design relates to the internal dimensions and guides for the inside displaceable upper tower part and the attached assembly technique, for example in the form of pulley wheels for deflecting the mounting part, so that the upper tower part can be extended to this area.
  • the middle part of the tower is first moved upwards along the outer edges of the lower and upper tower part in an intermediate step.
  • This shift is advantageously also not done via additionally introduced into the crane tower assembly technique but solely with the help of its own, preferably driven by a hoist pulley system, Kranlasthakens, which is hooked for the middle part of the tower.
  • the last telescoping movement to reach the highest operating position is the renewed extension of the upper part of the tower from the middle part of the tower. This can again with the known assembly technology, preferably a pulley system, done.
  • the hoisting rope - pulley system and the mounting part - pulley system of the crane via a common, alternately coupled, or decoupled drive is controlled.
  • the crane still has only a single drive, the crane still has the advantage of being able to reach an operating position with an increased crane-load hook height.
  • Fig. 1 represents a crane 1 according to the invention in the highest operating position, ie with fully telescoped tower 2.
  • the crane 1 has a vertically erected telescopic tower 2, which consists of three tower parts 21, 22, 23, namely a lower tower portion 21, the on a platform 7 equipped with a central ballast, a middle tower part 22 connected in an overlapping manner to the lower tower part 21 and an upper tower part 23 overlapping with the middle tower part 22 in the upper area.
  • the upper tower part 23 carries a horizontal boom 3, a equipped with counterweight horizontal counter-jib 4 and consisting of two obliquely converging rods spire 8 boom 3 and counter-jib 4 are opposite to supported upper end of the spire 8 by guy ropes.
  • the spire 8 is in turn connected to the platform 7 via guy rods.
  • the platform 7 is rotatably mounted.
  • the platform 7 is connected to a turntable, not shown here, with a rotary drive.
  • On the boom 3 is a in the Fig. 4 a to Fig. 7 d arranged along the boom longitudinal extension axis horizontally movable trolley 5, at which the crane hook 6 is articulated via a hoist rope 44.
  • the boom 3 is in two parts and is unfolded during the erection process in the air in the horizontal operating position.
  • Fig. 4 a to 7 d On the platform 7 are preferably in the Fig. 4 a to 7 d shown drives 50 and cable drums 31, 41 for the assembly plant for erecting and Austeleskopieren the crane 1 and for the hoist that drives the lifting and lowering movements of the crane lifting hook 6 in the operating state attached.
  • the tower parts 21, 22, 23 consist of a grid-like sidewall construction with a free inner cross-section, so that the tower parts 21, 22, 23 can be telescoped into one another.
  • the middle tower part 22 is the one with the largest free inner cross section of the three tower parts 21, 22, 23 and engages in the fully telescoping operating position of the crane 1 shown here, the lower tower part 21 and the upper tower part 23 in each case in cross section (see cross-sectional view Fig. 2 ) and in this way connects lower tower part 21 and upper tower part 23 with each other like a sleeve.
  • the middle tower part 22 is firmly connected in its lower region by a releasable bolt lock 64 with the lower tower part 21 in its upper region. In its upper part, the middle tower part 22 is again through a releasable bolt connection 65 fixedly connected to the upper tower part 23 in its lower region.
  • Fig. 2 represents a cross section along the line II - II through the crane tower Fig. 1 , So through the level of bolt locking between the middle tower portion 22 and the upper tower portion 23, is.
  • Both tower parts 22, 23 have a rectangular, approximately square cross-section with mutually perpendicular side walls and a free inner cross-section.
  • the upper tower part 23 is guided within the middle tower part 22.
  • the middle tower part 22 at its four inner edges four in the longitudinal direction of the tower 2 extending skids 66, which are adapted to the outer geometry of the upper tower portion 23.
  • skids 66 consist of a cross-sectionally L-shaped angle profile and are offset from the inner walls of the central tower portion 22 inwardly, so that the upper tower portion 23 with its four outer edges fit into the inner edges of the four skids 66 of the central tower portion 22 to form a vertical sliding guide is mounted, whereby lateral displacements between the two tower parts 22, 23 are excluded.
  • Fig. 2 recognizable as by two opposing skids 66 each have a bolt 65 is latched from the middle part of the tower 22, starting in the side walls of the upper tower part 23.
  • these two bolts 65 prevents the upper tower portion 23 relative to the central tower part 22 vertically, that is, in a plane perpendicular to the image plane of Fig. 2 , can move. In this way, it is thus guaranteed that the upper tower part 23 is securely locked to the middle tower part 22.
  • the two pins 65 can be withdrawn again to the outside, so that they no longer engage in the upper tower part 23 and the upper tower part 23 is thus again loose relative to the central tower part 22.
  • Fig. 3 a to 3 d show the four Teleskopierphasen the crane of the invention 1.
  • the four representations Fig. 3 are for simplification and better visualization the essential core of the present invention is highly schematic. In addition, the representations were limited to the three tower parts 21, 22, 23 of the crane.
  • FIG. 4 a to 7 b are the associated operating positions to those in the Fig. 3 a to 3 d shown schematically still four Teleskopierphasen in a more detailed overall view of the crane 1 respectively.
  • the Fig. 4 a . 5 a . 6 a . 7 a each show an isometric view and the Fig. 4 b . 5 b . 6 b . 7 b a corresponding smaller side view of the crane. 1
  • the free inner cross section of the middle tower part 22 is in each case adapted to the lower tower part 21 and to the upper tower part 23. Beginning over the greater part of its longitudinal extent at the lower edge, the middle tower part 22 has a free inner cross-section which is adapted to the lower tower part 21. In the upper end region, the middle tower part 22 has the cross-sectional view Fig. 2 a taper to a smaller free inner cross-section, which is adapted to the upper tower portion 23, wherein the upper tower portion 23 protrudes with its end portion of the lower tower portion 21. However, the largest part of the longitudinal extent of the upper tower part 23 is still telescoped in the interior of the lower tower part 21.
  • the middle tower part 22 has approximately the same length as the upper tower part 23, and the upper edge of the middle tower part 22 terminates approximately flush with the upper edge of the upper tower part 23.
  • Upper and middle tower part 22, 23 are each case securely attached to the lower tower part 21. Between upper and middle tower part 22, 23 there is no fixed connection in the telescoped state.
  • This mounting pulley system 30 has via a separate drive, but shares a common drive 50 with the hoist pulley system 40 of the crane 1.
  • the associated mounting roller 31 or the hoist drum 41 is coupled to the drive 50. Cable drums 31, 41 and common drive 50 are advantageously located on the lower platform 7 of the crane. 1
  • the pulleys 32, 33 of the mounting part pulley system 30 are mounted in the lower part of the upper tower part 23 and in the upper part of the middle tower part 22, so that the upper tower part 23 from the middle tower part 22, and thus also from the lower tower part 21, after Engagement of the mounting part pulley system 30 can be vorelusteleskopiert.
  • a balance weight 9 is attached to the crane lifting hook 6 in order to set the tower 2 torque-free.
  • the upper tower part 23 is moved via the mounting-part pulley system 30 from a position with great longitudinal overlap with the lower tower part 21 to a second position with little longitudinal overlap with the lower tower part 21, and therewith also with the middle tower part 22, extended.
  • This middle operating position is in the Fig. 3 b as well as in the Fig. 5 a as an isometric view and Fig. 5 b shown as a side view.
  • the mounting guide drum 31 is coupled to the drive 50 and the hoist drum 41 is decoupled from the drive 50.
  • the hoist rope 44 can follow the extension of the upper tower part 23 of the hoist drum 41 freely, since with increasing crane height and the need for free Hubseilains increases.
  • the upper tower portion 23 When reaching the in Fig. 5 a, b shown end position in the middle operating position, the upper tower portion 23 is latched in its lower portion via a detachable cross bolt connection 62 with the lower tower part 21 iffalls.
  • the middle part of the tower 22 remains unconnected and loose relative to the upper part of the tower.
  • the upper part of the tower 23 is still guided in the lower end portion of its longitudinal extent in the lower part of the tower 21 and fastened herefallicher. In a directly adjoining short region of its longitudinal extent, the upper tower part 23 continues to be guided in the tapered cross section of the upper end region of the middle tower part 22. After extension but now projects the largest part of the longitudinal extent of the upper tower part 23 from the lower and middle tower part 21, 22 upwards.
  • This intermediate step is in the Fig. 3c and in Figs. 6 a, b shown.
  • the crane lifting hook 6 is moved directly over the trolley 5 to the crane tower 2 and the crane lifting hook 6 is attached to the middle tower part 22.
  • the mounting pulley system 30 is decoupled from the drive 50 and the hoist pulley system 40 is coupled to the drive 50.
  • the fail-safe connection 63 of the central tower part 22 with the lower tower part 21 is released so that the middle tower part 22 only hangs on the crane hook 6.
  • the middle tower part 22 is pulled upwards along the lower tower part 21 and the upper tower part 23 via the hoist rope tackle system 40 of the crane lifting hook 6, specifically from its lower position (FIG. Fig. 5 a, b ), in which the middle tower part 22 has a large longitudinal overlap with the lower tower part 21 and a slight longitudinal overlap with the upper tower part 23, into an upper position (FIG. Fig. 6 a, b ), in which the middle tower part 22 now has only a small longitudinal overlap with the lower tower part 21 and a large longitudinal overlap with the upper tower part 23.
  • FIG. Fig. 5 a, b the middle tower part 22 has a large longitudinal overlap with the lower tower part 21 and a slight longitudinal overlap with the upper tower part 23, into an upper position (FIG. Fig. 6 a, b ), in which the middle tower part 22 now has only a small longitudinal overlap with the lower tower part 21 and a large longitudinal overlap with the upper tower part 23.
  • the upper part of the tower 23 is now telescoped so far out of the middle part of the tower 22 that the upper tower 23 has completely moved out of the lower part of the tower 21 and only overlaps with the middle part of the tower 22 in its upper area.
  • b is the upper tower part 23 in its lower part now if safe locked at the middle tower part 22 in the upper region by a cross bolt connection 65 if safe.
  • a direct connection between the upper tower part 23 and the lower tower part 21 no longer exists.
  • middle tower part 22 in the lower operating position ( Fig. 4 a, b ) and in the middle operating position ( Fig. 5 a, b ) represents a non-supporting element which is loose from the upper tower part 23, it is in the highest operating position ( Fig. 1 and Fig. 7 a, b ) has become a load-bearing connection element which allows an additional extension height of the crane 1.
  • Fig. 1 to 7 b illustrate an embodiment of the present invention, to which the present invention is by no means limited.
  • the invention is also applicable to all other types of crane with a telescopic tower, such as cranes in Vollmastkonstrutation (for example, cranes), stationary cranes (for example, on foundation anchors), cranes with any boom designs (trolley boom accordingly Fig. 4 a to 7 b , but also luffing jib, cantilever etc.), flat-top cranes, etc. applicable.

Abstract

The crane has a tower (2) with lower, middle and upper tower parts (21-23), where the part (23) is movable to extend the tower-height from a position with large longitudinal overlap with the part (21) into another position with small overlap. The part (22) is slidable along the parts (21, 23) to move the part (22) from a lower position exhibiting large longitudinal overlap with the part (21) into an upper position with small overlap. The part (22) is longitudinally slidable against the part (23) to move the part (23) into a third position exhibiting a longitudinal overlap with the part (22). An independent claim is also included for a method for moving a crane tower.

Description

Die vorliegende Erfindung betrifft einen Kran mit einem Turm, der sich aus mehreren ineinander verschiebbar geführten Turmteilen zusammensetzt gemäß dem Oberbegriff des Patentanspruchs 1. Außerdem betrifft die vorliegende Erfindung auch ein Verfahren zum Ausfahren des Turms eines solchen Krans.The present invention relates to a crane with a tower composed of a plurality of telescopically guided tower parts according to the preamble of claim 1. Furthermore, the present invention also relates to a method for extending the tower of such a crane.

Bei einem beispielsweise aus der DE-PS 1168617 bekannten Kran besteht der Turm aus mindestens zwei teleskopartig ineinander verschiebbaren Turmteilen. Das Turmteil mit dem größten Aufnahmequerschnitt ist hier als Außenteil bezeichnet und bildet im aufgerichteten Zustand die Basis des Turms, während das im Außenteil geführte Innenteil mit einem Teleskopiermechanismus im Außenteil bis zur Erreichung der vorgesehene Betriebsstellung verschoben wird. Um die Ausfahrbewegung des Innenteils zur Erreichung einen Stellung mit vergrößerter Lasthakenhöhe fortsetzen zu können, wird wiederum das Außenteil durch Anbau einer Verlängerung erhöht, bevor das Innenteil mit dem gleichen Teleskopiermechanismus weiter in eine höhere Betriebsstellung hochgehievt wird.For example, from the DE-PS 1168617 known crane, the tower consists of at least two telescopically movable tower parts. The tower part with the largest receiving cross-section is referred to here as the outer part and in the erected state forms the base of the tower, while the guided in the outer part of the inner part is moved with a telescoping mechanism in the outer part until the intended operating position. In order to continue the extension movement of the inner part to achieve a position with increased load hook height, in turn, the outer part is increased by mounting an extension before the inner part is hoisted up with the same telescoping mechanism in a higher operating position.

Der Anbau dieser Verlängerung bedeutet einen erheblichen zusätzlichen Montageaufwand, weil die Verlängerungsteile auf der Baustelle erst in Montageposition gehoben und dann am Außenteil durch Montagepersonal fest verankert werden müssen. Die zu verbaüenden Verlängerungsteile werden separat an die Baustelle verfrachtet, was einen zusätzlichen Transportaufwand bedeutet.The cultivation of this extension means a considerable additional installation effort, because the extension parts must first be lifted on the construction site in the mounting position and then firmly anchored on the outer part by assembly personnel. The verbaenden extension parts are shipped separately to the site, which means additional transport.

Zudem sind aus dem Stand der Technik Kräne bekannt, deren Lasthakenhöhe durch Einfügung zusätzlicher Außen- und / oder Innenturmschüsse vergrößert werden kann. In diesen Fällen spricht man von sogenannten Kletterkränen, die die Möglichkeit bieten, die Lasthakenhöhe dem Baustellenfortschritt anzupassen.In addition, cranes are known from the prior art, the load hook height can be increased by inserting additional outside and / or inside tower shots. In these cases one speaks of so-called climbing cranes, which offer the possibility to adapt the load hook height to the site progress.

So beschreibt die DE-PS 2930161 einen zusammenklappbaren Schnellmontagekran mit einem die Basis des aufgerichteten Turms bildenden Außenturm und einem darin teleskopartig verschiebbaren Innenturm, dessen Lasthakenhöhe durch Aufstockung des Außen- und / oder Innenturms vergrößert werden kann. Zur Aufstockung des Außenturms ist der obere Seilrollenträger vom Außenturm abnehmbar und wird mit Hilfe des eigenen Kranlasthakens hochgefahren. Zusätzliche U-förmige Turmelemente, die um den Innenturm herum durch eine vertikale, schwenkbare Konstruktion geschlossen werden, werden dann am oberen Teil des Außenturms befestigt. Der Seilrollenträger wird am oberen Teil des eingefügten Außenturmelements wiederbefestigt. Zur Aufstockung des Innenturms wird der Teleskopierantrieb am Fuß des Innenturms gelöst und heruntergefahren. Ein zusätzliches Turmelement wird dann durch eine seitliche Öffnung des Außenturms zwischen Teleskopierantrieb und unterem Teil des Innenturms verbracht und befestigt.That's how it describes DE-PS 2930161 a collapsible rapid-erecting crane with an outer tower forming the base of the erected tower and an inner tower telescopically displaceable therein, the load hook height of which can be increased by topping up the outer and / or inner towers. To top up the outer tower, the upper pulley support is removable from the outer tower and is raised with the help of its own crane lifting hook. Additional U-shaped tower elements, which are closed around the inner tower by a vertical, hinged construction, are then attached to the upper part of the outer tower. Of the Cable carrier is re-attached to the upper part of the inserted external alarm element. To increase the inner tower, the telescopic drive at the foot of the inner tower is released and shut down. An additional tower element is then spent and secured by a lateral opening of the outer tower between Teleskopierantrieb and lower part of the inner tower.

In der DE-PS 2730724 wird ebenfalls eine Methode zur Aufstockung eines Vertikalgefüges durch Einbringung zusätzlicher Turmelemente beschrieben. Dazu ist der Kran mit einer Aufstockvorrichtung versehen, die als Teleskoplerkäfig bezeichnet wird. In den Teleskopierkäfig ist ein Hub- und Führungssystem integriert, mit dem nach Trennung des Turms ein oberes Turmteil komplett um einen Zwischenraum angehoben wird, so dass seitlich ein zusätzliches Turmelement eingeführt werden kann. Zur seitlichen Einführung dieser Turmelemente ist am Teleskopierkäfig außerdem ein horizontales Schlenensystem vorgesehen.In the DE-PS 2730724 Also, a method for increasing a vertical structure by introducing additional tower elements is described. For this purpose, the crane is provided with a Aufstockvorrichtung, which is referred to as a telescopic cage. In the telescoping cage, a lifting and guiding system is integrated, with the separation of the tower, an upper tower part is completely raised by a gap, so that laterally an additional tower element can be introduced. For lateral introduction of these tower elements, a horizontal Schlenk system is also provided on Teleskopierkäfig.

Solche Methoden zur sogenannten Aufstockung der Turmhöhe eines Turmkrans durch Einbringung zusätzlicher Turmschüsse sind heute weit verbreitet. Zum einen ist aber eine solche Aufstockung mit hohem zusätzlichem Montageaufwand verbunden. Die zusätzlich eingebrachten Turmschüsse müssen an Außen- und / oder Innenturmteilen angeschlossen werden, was sowohl ein zusätzliches Sicherheitsrisiko für das Montagepersonal auf der Baustelle bedeutet, die dafür den Turm besteigen müssen, als auch eine hohe zusätzliche Stillstandszeit mit sich bringt. Eine Minimierung der Stillstandszeit ist aber, insbesondere bei Schnellmontagekränen, die für schnellstmöglichen und flexiblen Einsatz auf der Baustelle entwickelt wurden, ein wichtiges wirtschaftliches Einsatzkriterium.Such methods for so-called increase the tower height of a tower crane by introducing additional tower shots are now widespread. On the one hand, however, such an increase is associated with high additional installation effort. The additionally introduced tower shots must be connected to exterior and / or interior tower parts, which means both an additional security risk for the assembly personnel on site, who have to climb the tower, as well as a high additional downtime brings with it. However, a minimization of downtime is an important economic application criterion, especially in the case of rapid assembly cranes, which have been developed for the fastest possible and flexible use on the construction site.

Zum anderen sind bedingt durch die nachteilige Methode der Aufstockung die Turmschüsse meist aus einer U-förmigen Konstruktion, die erst durch eine vertikale, schwenkbare Konstruktion um den Innenturm herum geschlossen werden müssen, oder im AuBenturm sind Öffnungen gelassen, in die zusätzliche Turmschüsse seitlich eingeführt werden. Beides ist aus beanspruchungstechnischer Sicht von Nachteil, weil zusätzliche potentielle Schwachstellen in Form der schwenkbaren Verriegelung oder in Form der seitlichen Öffnungen in das Turmsystem eingebracht werden.On the other hand, due to the disadvantageous method of topping up the tower shots are usually of a U-shaped construction, which must first be closed by a vertical, pivoting construction around the inner tower around, or in AuBenturm openings are left in the additional tower shots are introduced laterally , Both aspects are disadvantageous from a stress point of view because additional potential weak points in the form of the pivotable lock or in the form of the lateral openings are introduced into the tower system.

Weiterhin werden insbesondere die Vorzüge eines kompakt transportierbaren Schnellmontagekrans in gewisser Weise aufgehoben, wenn zusätzlich zum Kran noch Turmschüsse zur Aufstockung an die Baustelle gefahren werden müssen, was nicht immer auf demselben Transportzug möglich sein wird.Furthermore, in particular the advantages of a compact transportable quick-erecting crane are lifted in some way, if in addition to the crane yet Tower shots must be driven to the top of the construction site, which will not always be possible on the same transport train.

Des Weiteren sind die bestehenden Lösungen zur Aufstockung mit Hilfe einer Aufstockvorrichtung - wie zum Beispiel eines Teleskopierkäfigs - mit dem Nachteil verbunden, dass eine zusätzliche teure Vorrichtung mit einem zusätzlichen Teleskopierantrieb an den Kran angebracht werden muss. Vor allem für kleine Baukräne - wie insbesondere Schnellmontagekräne - sind solche Aufstockvorrichtungen unwirtschaftlich.Furthermore, the existing solutions for replenishment by means of a Aufstockvorrichtung - such as a Teleskopierkäfigs - associated with the disadvantage that an additional expensive device with an additional Teleskopierantrieb must be attached to the crane. Especially for small construction cranes - in particular high-speed cranes - such Aufstockvorrichtungen are uneconomical.

Demzufolge werden zurzeit vor allem bei als Schnellmontagekränen ausgebildeten Kränen, die gestellten Forderungen hinsichtlich schneller und einfacher Montage im Falle einer notwendig werdenden zusätzlichen Erhöhung der Lasthakenhöhe durch die für Kletterkräne gängigen Methoden der Turmaufstockung nicht erfüllt.As a result, the cranes that are currently being designed, especially in the case of cranes designed as fast-erecting cranes, are not met in the event of a necessary additional increase in load hook height due to the methods of tower topping common for climbing cranes.

Der Teleskopturm eines Schnellmontagekrans ist in der Regel zweiteilig und besteht aus AuBenturm und Innenturm, wobei der Innenturm im Außenturm teleskopartig verschiebbar und in der Straßentransportstellung vollständig in den Außenturm eingefahren ist, um die maximal zulässigen Straßentransportmaße eines Lastzuges samt Ladung von 20,75 m Länge, 2,55 m Breite und 4 m Höhe gemäß § 22 StVO nicht zu überschreiten. Die Folge davon ist, dass Schnellmontagekräne mit einem Außen- und einem Innenturm in voll austeleskopierter Betriebsstellung eine Hakenhöhe von 28 m zumeist nicht überschreiten, bedingt durch die vom Straßentransport herrührende Limitierung der Längen der Einzelturmteile.The telescopic tower of a fast-erecting crane is usually in two parts and consists of AuBenturm and inner tower, the inner tower in the outer tower telescopically displaced and fully retracted in the road transport position in the outer tower to the maximum allowable road transport dimensions of a trailer with a load of 20.75 m in length, 2.55 m width and 4 m height according to § 22 StVO not to be exceeded. The consequence of this is that fast-erecting cranes with an outer and an inner tower in vollteleskopierter operating position a hook height of 28 m usually do not exceed, due to the resulting from the road transport limitation of the lengths of the single tower parts.

Aufgabe der vorliegenden Erfindung ist es daher, einen Kran nach dem Oberbegriff des Patentanspruchs 1 zu schaffen, der in einfacher Weise das Erreichen einer weiteren Betriebsstellung mit vergrößerter Lasthakenhöhe zulässt.Object of the present invention is therefore to provide a crane according to the preamble of claim 1, which allows in a simple manner to achieve a further operating position with increased load hook height.

Diese Aufgabe wird gelöst durch die kennzeichnenden Merkmale des Patentanspruchs 1.This object is achieved by the characterizing features of patent claim 1.

Vorteilhafte Ausführungsformen ergeben sich aus den Unteransprüchen.Advantageous embodiments will be apparent from the dependent claims.

Der erfindungsgemäße Kran weist ein zusätzliches drittes Turmteil auf, das im Folgenden auch mittleres Turmteil genannt wird. Die drei Turmteile sind ineinander geführt und besitzen einen vorzugsweise rechteckigen Querschnitt mit einem freien Innenquerschnitt. Dabei weist das mittlere Turmteil einen freien Innenquerschnitt auf, der größer ist als die Außenabmessungen der anderen beiden Turmteile, so dass er diese im Querschnitt umgreift.The crane according to the invention has an additional third tower part, which is also referred to below as the middle tower part. The three tower parts are guided into each other and have a preferably rectangular cross-section with a free Internal cross-section. In this case, the middle part of the tower has a free inner cross section, which is larger than the outer dimensions of the other two tower parts, so that it surrounds them in cross section.

In vollständig einteleskopierter Stellung des Turms - zum Beispiel in waagerecht gekippter Straßentransportstellung - umgreift das mittlere Turmteil über seine komplette Längserstreckung in seinem Inneren die beiden anderen Turmteile und erhöht daher im demontierten Transportzustand nur unwesentlich das Transportvolumen des Krans.In completely telescoping position of the tower - for example in horizontally tilted road transport position - embraces the middle part of the tower over its entire longitudinal extent in the interior of the other two tower parts and therefore increased in the disassembled transport condition only slightly the transport volume of the crane.

Zur Erreichung einer zusätzlichen dritten Position mit einer maximalen Lasthakenhöhe von etwa 36 m fungiert dieses mittlere Turmteil gleichsam als Muffe, die unteres Turmteil und oberes Turmteil miteinander verbindet und damit eine zusätzliche Arbeitshöhe von etwa 8 m zur Verfügung stellt, ohne das hierfür dem zusätzlichen dritten Turmteil auch noch zusätzliche Montagetechnik, zum Beispiel in Form eines separaten Teleskopierantriebs mit angeschlossenen Übertragungsmitteln, im Kranturm beigefügt werden müssten.To achieve an additional third position with a maximum load hook height of about 36 m, this middle tower part acts as a sleeve that connects the lower tower part and upper tower part and thus provides an additional working height of about 8 m, without the additional third tower part also additional assembly technology, for example in the form of a separate Teleskopierantriebs with connected transmission means, would have to be added in the crane tower.

Vielmehr erfolgt die zur Erreichung einer zusätzlichen Kranlasthakenhöhe notwendige Verschiebung des mittleren Turmteils allein über das Hubseil-Flaschenzugsystem des Kraniasthakens, der am mittleren Turmteil zu diesem Zweck eingehangen wird.Rather, the necessary to achieve an additional Kranläthakenhöhe displacement of the central tower part is done solely on the hoist rope pulley system of Kraniasthakens, which is mounted on the middle part of the tower for this purpose.

Der Vorteil der vorliegende Erfindung liegt also darin, dass eine zusätzliche Betriebsposition mit vergrößerter Lasthakenhöhe für einen Kran mit teleskopierbarem Turm bereitgestellt wird, indem ein zusätzliches drittes Turmteil in den Turm integriert wird, das im vollständig einteleskopierten Transportzustand des Krans nur einen unwesentlichen zusätzlichen Raumbedarf erfordert.The advantage of the present invention is therefore that an additional operating position with increased load hook height for a crane with telescopic tower is provided by an additional third tower part is integrated into the tower, which only requires a negligible additional space in the fully einteleskopierten transport state of the crane.

Durch dieses dritte Turmteil wird der Turm aber nicht zu einem in bekannter Weise dreifach ineinander teleskopierbaren Vertikalgefüge. Für diesen Fall würde das Ausfahren des mittleren und des oberen Turmteils zunächst aus dem stationären unteren Turmteil und dann wiederum abschließend das Ausfahren des oberen aus dem mittleren Turmteil jeweils einen eigenen Teleskopierantrieb mit zugeordneten Übertragungsmitteln, zum Beispiel in Form von Seilflaschenzugsystemen, für das mittlere Turmteil und für das obere Turmteil separat erforderlich werden lassen. Im Vergleich zum konventionellen zweifach teleskopierbaren Kran würde ein solcher dreifach ineinander teleskopierbarer Kran nur mit signifikant gestiegenen Fertigungskosten und außerdem nur mit einem zusätzlichen Anstieg an Gewicht und Volumen wegen der zusätzlich zu integrierenden Montagetechnik zu realisieren sein.By this third tower part of the tower but not in a known manner three telescopically telescoping vertical structure. For this case, the extension of the middle and the upper tower part would first from the stationary lower tower part and then turn the extension of the upper from the middle tower part each have their own Teleskopierantrieb with associated transmission means, for example in the form of Seilflaschenzugsystemen, for the middle tower part and separately required for the upper tower section. Compared to the conventional double-telescopic crane, such a triple telescoping crane would only increase significantly Manufacturing costs and also be realized only with an additional increase in weight and volume because of the addition to be integrated mounting technology.

In vorteilhafter Weise ist bei der vorliegenden Erfindung das dritte, mittlere Turmteil derart gestaltet, dass der Kran eine zusätzliche Betriebsposition mit vergrößerter Lasthakenhöhe erreicht und dabei aber weiterhin nur mit der bekannten Montagetechnik eines konventionellen zweifach teleskopierbaren Turms auskommt.Advantageously, in the present invention, the third, middle tower part designed such that the crane reaches an additional operating position with increased load hook height, while continuing to make do only with the known mounting technique of a conventional double-telescopic tower.

Dabei erfolgt beim erfindungsgemäßen Kran das Ausfahren des oberen Turmteils weiterhin mit der bekannten Montagetechnik - vorzugsweise über ein Montageseil-Flaschenzugsystem - wie beim konventionellen zweifach teleskopierbaren Kranturm, mit dem einzigen Unterschied, dass das obere Turmteil nicht aus dem unteren sondern aus dem mittleren Turmteil ausgefahren wird. Dafür ist der obere Bereich des mittleren Turmteils beim erfindungsgemäßen Kran genauso konstruiert wie der obere Bereich des unteren Turmteils eines konventionellen zweifach teleskopierbaren Krariturms. Diese übereinstimmende Gestaltung betrifft die Innenabmessungen und Führungen für das im Inneren verschiebbare obere Turmteil und die angebrachte Montagetechnik, zum Beispiel in Form von Seilflaschenrollen zum Umlenken des Montageseils, damit das obere Turmteil bis zu diesem Bereich ausgefahren werden kann.In the crane according to the invention, the extension of the upper part of the tower continues to be carried out with the known assembly technique - preferably via a montageseil pulley system - as in the conventional double telescopic crane tower, with the only difference that the upper part of the tower is not extended from the lower but from the middle part of the tower , For this purpose, the upper part of the middle part of the tower in the crane according to the invention is constructed in the same way as the upper part of the lower part of the tower of a conventional double telescopic crane tower. This matching design relates to the internal dimensions and guides for the inside displaceable upper tower part and the attached assembly technique, for example in the form of pulley wheels for deflecting the mounting part, so that the upper tower part can be extended to this area.

Zum Erreichen einer höchsten Betriebsposition wird in einem Zwischenschritt das mittlere Turmteil zunächst entlang der Außenkanten des unteren und oberen Turmteils nach oben verschoben. Diese Verschiebung erfolgt vorteilhafterweise ebenfalls nicht über zusätzlich in den Kranturm eingebrachte Montagetechnik sondern allein mit Hilfe des eigenen, vorzugsweise über ein Hubseil-Flaschenzugsystem angetriebenen, Kranlasthakens, der dafür an das mittlere Turmteil eingehangen wird.To achieve a highest operating position, the middle part of the tower is first moved upwards along the outer edges of the lower and upper tower part in an intermediate step. This shift is advantageously also not done via additionally introduced into the crane tower assembly technique but solely with the help of its own, preferably driven by a hoist pulley system, Kranlasthakens, which is hooked for the middle part of the tower.

Dabei ist es weiterhin von Vorteil, dass keine zusätzlichen Turmschüsse von außen in den Kranturm eingefügt werden müssen. Beim erfindungsgemäßen Kran ist es nur notwendig, den bereits integrierten zusätzlichen Turmteil mit dem Kranlasthaken hochzuschieben. Diese Verschiebung kann ohne großen zusätzlichen Zeit- und Montageaufwand erfolgen.It is also advantageous that no additional tower shots must be inserted from the outside in the crane tower. When crane according to the invention, it is only necessary to move up the already integrated additional tower section with the crane hook. This shift can be done without much additional time and effort.

Die letzte Teleskopierbewegung zum Erreichen der höchsten Betriebsposition ist das neuerliche Ausfahren des oberen Turmteils aus dem mittleren Turmteil. Dies kann wiederum mit der bekannten Montagetechnik, vorzugsweise einem Seilflaschenzugsystem, geschehen.The last telescoping movement to reach the highest operating position is the renewed extension of the upper part of the tower from the middle part of the tower. This can again with the known assembly technology, preferably a pulley system, done.

In einer weiteren vorteilhaften Ausführung der vorliegenden Erfindung wird das Hubseil - Flaschenzugsystem und das Montageseil - Flaschenzugsystem des Krans über einen gemeinsamen, wechselweise koppelbaren, bzw. entkoppelbaren Antrieb gesteuert. Der Kran bietet auf diese Weise, obwohl er weiterhin nur über einen einzigen Antrieb verfügt, trotzdem den Vorteil eine Betriebsposition mit vergrößerter Kranlasthakenhöhe erreichen zu können. Die mit dem einzigen Antrieb verbundenen zusätzlichen Vorteile, was Platz-, Gewichts- und vor allem Kostenersparnis angeht, bleiben dabei erhalten.In a further advantageous embodiment of the present invention, the hoisting rope - pulley system and the mounting part - pulley system of the crane via a common, alternately coupled, or decoupled drive is controlled. In this way, although the crane still has only a single drive, the crane still has the advantage of being able to reach an operating position with an increased crane-load hook height. The additional advantages associated with the single drive, in terms of space, weight and, above all, cost savings, are retained.

Die Erfindung wird nachstehend anhand eines in den Zeichnungen dargestellten Ausfühnrngsbeispiels näher erläutert.The invention will be explained in more detail below with reference to an embodiment shown in the drawings.

Es zeigt:

Fig. 1
eine Seitenansicht auf einen erfindungsgemäßen Kran in seiner voll austeleskopierten Betriebsstellung,
Fig. 2
einen Schnitt durch den Kranturm der Fig. 1 längs der Linie II - II,
Fig. 3 a - 3 d
schematische Darstellungen der aufeinanderfolgenden Phasen beim Austeleskopieren des Kranturms,
Fig. 4 a - 7 d
Darstellungen des Krans in den vier Ausfahrstufen der Fig. 3 a - 3 d.
It shows:
Fig. 1
a side view of a crane according to the invention in its fully telescoped operating position,
Fig. 2
a section through the crane tower of Fig. 1 along the line II - II,
Fig. 3 a - 3 d
schematic representations of the successive phases during telescoping of the crane tower,
Fig. 4 a - 7 d
Representations of the crane in the four extension stages of the Fig. 3 a - 3 d.

Fig. 1 stellt einen erfindungsgemäßen Kran 1 in der höchsten Betriebsstellung, das heißt mit voll austeleskopiertem Turm 2, dar. Der Kran 1 besitzt einen vertikal aufgerichteten teleskopierbaren Turm 2, der aus drei Turmteilen 21, 22, 23 besteht, nämlich einem unteren Turmteil 21, der auf einer mit Zentralballast bestückten Plattform 7 angebracht ist, einem mit dem unteren Turmteil 21 im oberen Bereich überlappend verbundenen mittleren Turmteil 22 und einem mit dem mittleren Turmteil 22 im oberen Bereich überlappend verbundenen oberen Turmteil 23. Das obere Turmteil 23 trägt einen horizontalen Ausleger 3, einen mit Gegengewicht bestückten horizontalen Gegenausleger 4 und eine aus zwei schräg zusammenlaufenden Stangen bestehende Turmspitze 8. Ausleger 3 und Gegenausleger 4 sind gegenüber dem oberen Ende der Turmspitze 8 durch Abspannseile abgestützt. Die Turmspitze 8 ist wiederum mit der Plattform 7 über Abspannstangen verbunden. Fig. 1 represents a crane 1 according to the invention in the highest operating position, ie with fully telescoped tower 2., The crane 1 has a vertically erected telescopic tower 2, which consists of three tower parts 21, 22, 23, namely a lower tower portion 21, the on a platform 7 equipped with a central ballast, a middle tower part 22 connected in an overlapping manner to the lower tower part 21 and an upper tower part 23 overlapping with the middle tower part 22 in the upper area. The upper tower part 23 carries a horizontal boom 3, a equipped with counterweight horizontal counter-jib 4 and consisting of two obliquely converging rods spire 8 boom 3 and counter-jib 4 are opposite to supported upper end of the spire 8 by guy ropes. The spire 8 is in turn connected to the platform 7 via guy rods.

Bei dem untendrehenden Kran 1 ist die Plattform 7 drehbar gelagert. Dazu ist die Plattform 7 mit einem hier nicht dargestellten mit Drehantrieb versehenen Drehkranz verbunden. Auf dem Ausleger 3 ist eine in den Fig. 4 a bis Fig. 7 d dargestellte entlang der Auslegerlängserstreckungsachse horizontal verfahrbare Laufkatze 5 angeordnet, an welcher der Kranlasthaken 6 über ein Hubseil 44 angelenkt ist.In the lower-rotating crane 1, the platform 7 is rotatably mounted. For this purpose, the platform 7 is connected to a turntable, not shown here, with a rotary drive. On the boom 3 is a in the Fig. 4 a to Fig. 7 d arranged along the boom longitudinal extension axis horizontally movable trolley 5, at which the crane hook 6 is articulated via a hoist rope 44.

Als Schnellmontagekran wird der in Fig. 1 dargestellte Kran 1 aus einer horizontalen Transportstellung mit voll einteleskopiertem Turm 2 und mit am Turm 2 anliegendem, eingeklapptem Ausleger 3 und Gegenausleger 4, in die hier dargestellte vertikale Betriebsstellung zunächst aufgerichtet, bevor der Turm 2 bei horizontal ausgeklapptem Ausleger 3 und Gegenausleger 4 auf verschiedene Höhe bis zur hier dargestellten höchsten Betriebsposition voll austeleskopiert wird.As a rapid assembly crane, the in Fig. 1 illustrated crane 1 from a horizontal transport position with fully ateleskopiertem tower 2 and adjacent to the tower 2, folded boom 3 and counter-jib 4, erected in the illustrated here vertical operating position before the tower 2 at horizontally unfolded boom 3 and counter jib 4 at different heights is fully telescoped to the highest operating position shown here.

Der Ausleger 3 ist zweiteilig und wird während des Aufrichtvorgangs in der Luft in die horizontale Betriebsstellung ausgeklappt.The boom 3 is in two parts and is unfolded during the erection process in the air in the horizontal operating position.

Auf der Plattform 7 sind vorzugsweise die in den Fig. 4 a bis 7 d dargestellten Antriebe 50 und Seiltrommeln 31, 41 für das Montagewerk zum Aufrichten und Austeleskopieren des Krans 1 und für das Hubwerk, das im Betriebszustand die Hub- und Senkbewegungen des Kranlasthakens 6 antreibt, angebracht.On the platform 7 are preferably in the Fig. 4 a to 7 d shown drives 50 and cable drums 31, 41 for the assembly plant for erecting and Austeleskopieren the crane 1 and for the hoist that drives the lifting and lowering movements of the crane lifting hook 6 in the operating state attached.

Die Turmteile 21, 22, 23 bestehen aus einer gitterartigen Seitenwandkonstruktion mit freiem Innenquerschnitt, so dass die Turmteile 21, 22, 23 sich teleskopartig ineinander verschieben lassen. Das mittlere Turmteil 22 ist von den drei Turmteilen 21, 22, 23 dasjenige mit dem größten freien Innenquerschnitt und umgreift in der hier dargestellten voll austeleskopierten Betriebsstellung des Krans 1 das untere Turmteil 21 und das obere Turmteil 23 jeweils im Querschnitt (vergl. Querschnittsdarstellung aus Fig. 2) und verbindet auf diese Weise unteres Turmteil 21 und oberes Turmteil 23 muffenartig miteinander.The tower parts 21, 22, 23 consist of a grid-like sidewall construction with a free inner cross-section, so that the tower parts 21, 22, 23 can be telescoped into one another. The middle tower part 22 is the one with the largest free inner cross section of the three tower parts 21, 22, 23 and engages in the fully telescoping operating position of the crane 1 shown here, the lower tower part 21 and the upper tower part 23 in each case in cross section (see cross-sectional view Fig. 2 ) and in this way connects lower tower part 21 and upper tower part 23 with each other like a sleeve.

Zu diesem Zweck ist das mittlere Turmteil 22 in seinem unteren Bereich durch eine lösbare Bolzenverriegelung 64 mit dem unteren Turmteil 21 in dessen oberem Bereich fest verbunden. In seinem oberen Bereich ist das mittlere Turmteil 22 wiederum durch eine lösbare Bolzenverbindung 65 mit dem oberen Turmteil 23 in dessen unterem Bereich fest verbunden.For this purpose, the middle tower part 22 is firmly connected in its lower region by a releasable bolt lock 64 with the lower tower part 21 in its upper region. In its upper part, the middle tower part 22 is again through a releasable bolt connection 65 fixedly connected to the upper tower part 23 in its lower region.

Somit liegt im voll austeleskopierten Zustand ein Bereich entlang der Längserstreckung des Turms 2 vor, der nur aus dem mittleren Turmteil 23 gebildet ist, und zwar zwischen der Oberkante des unteren Turmteils 21 und der Unterkante des oberen Turmteils 23. Durch das zusätzliche mittlere Turmteil 22 wird also eine Verlängerung der Turmhöhe des Krans 1 und damit der maximalen Kranlasthakenhöhe erreicht.Thus, in the fully telescoping state, there is an area along the longitudinal extent of the tower 2, which is formed only from the central tower part 23, between the upper edge of the lower tower part 21 and the lower edge of the upper tower part 23 So an extension of the tower height of the crane 1 and thus the maximum crane hook height achieved.

Fig. 2 stellt einen Querschnitt entlang der Linie II - II durch den Kranturm aus Fig. 1, also durch die Ebene der Bolzenverriegelung zwischen mittlerem Turmteil 22 und oberem Turmteil 23, dar. Beide Turmteile 22, 23 weisen einen rechtwinkligen, annähernd quadratischen Querschnitt mit rechtwinklig zueinander angeordneten Seitenwänden und einem freien Innenquerschnitt auf. Dabei ist das obere Turmteil 23 innerhalb des mittleren Turmteils 22 geführt. Zu diesem Zweck weist das mittlere Turmteil 22 an seinen vier Innenkanten vier in Längserstreckungsrichtung des Turms 2 verlaufende Gleitkufen 66 auf, die an die Außengeometrie des oberen Turmteils 23 angepasst sind. Diese Gleitkufen 66 bestehen aus einem im Querschnitt gesehen L-förmigen Winkelprofil und sind von den Innenwänden des mittleren Turmteils 22 nach innen versetzt, so dass das obere Turmteil 23 mit seinen vier Außenkanten passgenau in den Innenkanten der vier Gleitkufen 66 des mittleren Turmteils 22 unter Bildung einer vertikalen Gleitführung gelagert ist, wodurch seitliche Verschiebungen zwischen den beiden Turmteilen 22, 23 ausgeschlossen sind. Fig. 2 represents a cross section along the line II - II through the crane tower Fig. 1 , So through the level of bolt locking between the middle tower portion 22 and the upper tower portion 23, is. Both tower parts 22, 23 have a rectangular, approximately square cross-section with mutually perpendicular side walls and a free inner cross-section. In this case, the upper tower part 23 is guided within the middle tower part 22. For this purpose, the middle tower part 22 at its four inner edges four in the longitudinal direction of the tower 2 extending skids 66, which are adapted to the outer geometry of the upper tower portion 23. These skids 66 consist of a cross-sectionally L-shaped angle profile and are offset from the inner walls of the central tower portion 22 inwardly, so that the upper tower portion 23 with its four outer edges fit into the inner edges of the four skids 66 of the central tower portion 22 to form a vertical sliding guide is mounted, whereby lateral displacements between the two tower parts 22, 23 are excluded.

Des Weiteren ist aus Fig. 2 erkennbar wie durch zwei gegenüberliegende Gleitkufen 66 jeweils ein Bolzen 65 vom mittleren Turmteil 22 ausgehend in die Seitenwände des oberen Turmteils 23 eingerastet ist. Durch diese beiden Bolzen 65 wird verhindert, dass das obere Turmteil 23 sich relativ zum mittleren Turmteil 22 vertikal, das heißt in einer Ebene senkrecht zur Bildebene von Fig. 2, bewegen kann. Auf diese Weise ist also garantiert, dass das obere Turmteil 23 fallsicher mit dem mittleren Turmteil 22 verriegelt ist. Zur Entriegelung können die beiden Bolzen 65 wieder nach außen zurückgezogen werden, so dass sie nicht mehr in das obere Turmteil 23 eingreifen und das obere Turmteil 23 somit wieder lose gegenüber dem mittleren Turmteil 22 ist.Furthermore, it is off Fig. 2 recognizable as by two opposing skids 66 each have a bolt 65 is latched from the middle part of the tower 22, starting in the side walls of the upper tower part 23. By these two bolts 65 prevents the upper tower portion 23 relative to the central tower part 22 vertically, that is, in a plane perpendicular to the image plane of Fig. 2 , can move. In this way, it is thus guaranteed that the upper tower part 23 is securely locked to the middle tower part 22. For unlocking the two pins 65 can be withdrawn again to the outside, so that they no longer engage in the upper tower part 23 and the upper tower part 23 is thus again loose relative to the central tower part 22.

Fig. 3 a bis 3 d zeigen die vier Teleskopierphasen des erfindungsgemäßen Krans 1. Die vier Darstellungen aus Fig. 3 sind zur Vereinfachung und besseren Sichtbarmachung des wesentlichen Kerns der vorliegenden Erfindung stark schematisiert. Zudem wurden die Darstellungen auf die drei Turmteile 21, 22, 23 des Krans beschränkt. Fig. 3 a to 3 d show the four Teleskopierphasen the crane of the invention 1. The four representations Fig. 3 are for simplification and better visualization the essential core of the present invention is highly schematic. In addition, the representations were limited to the three tower parts 21, 22, 23 of the crane.

In den Fig. 4 a bis 7 b sind die zugehörigen Betriebsstellungen zu den in den Fig. 3 a bis 3 d noch schematisiert dargestellten vier Teleskopierphasen in einer detaillierteren Gesamtdarstellung des Krans 1 jeweils abgebildet. Die Fig. 4 a, 5 a, 6 a, 7 a zeigen jeweils eine Isometrieansicht und die Fig. 4 b, 5 b, 6 b, 7 b eine korrespondierende kleinere Seitenansicht des Krans 1.In the Fig. 4 a to 7 b are the associated operating positions to those in the Fig. 3 a to 3 d shown schematically still four Teleskopierphasen in a more detailed overall view of the crane 1 respectively. The Fig. 4 a . 5 a . 6 a . 7 a each show an isometric view and the Fig. 4 b . 5 b . 6 b . 7 b a corresponding smaller side view of the crane. 1

Im Folgenden werden nun anhand der Fig. 3 a bis 7 b die Teleskopierbewegungen eines erfindungsgemäßen Krans 1 erläutert.The following are now based on the Fig. 3 a to 7 b explains the Teleskopierbewegungen a crane 1 of the invention.

In seiner untersten Betriebsstellung (Fig. 3 a, Fig. 4 a, b) ist das obere Turmteil 23 noch fast über seine komplette längserstreckung in das untere Turmteil 21 eingefahren und das mittlere Turmteil 22 umgreift wiederum über fast seine komplette Längserstreckung das untere Turmteil 21 und damit auch das obere Turmteil 23.In its lowest operating position ( Fig. 3 a . Fig. 4 a, b ), the upper tower part 23 is still retracted almost over its entire longitudinal extent in the lower part of the tower 21 and the middle part of the tower 22 again engages over almost its entire longitudinal extent the lower tower part 21 and thus also the upper part of the tower 23rd

Der freie Innenquerschnitt des mittleren Turmteils 22 ist dabei jeweils an das untere Turmteil 21 und an das obere Turmteil 23 angepasst. Über den größten Teil seiner Längserstreckung an der Unterkante beginnend weist das mittlere Turmteil 22 einen freien Innenquerschnitt auf, der an das untere Turmteil 21 angepasst ist. Im oberen Endbereich weist das mittlere Turmteil 22 entsprechend der Querschnittsdarstellung aus Fig. 2 eine Verjüngung auf einen kleineren freien Innenquerschnitt auf, der an das obere Turmteil 23 angepasst ist, wobei das obere Turmteil 23 mit seinem Endbereich aus dem unteren Turmteil 21 herausragt. Allerdings befindet sich der größte Teil der Längserstreckung des oberen Turmteils 23 noch einteleskopiert im Inneren des unteren Turmteils 21.The free inner cross section of the middle tower part 22 is in each case adapted to the lower tower part 21 and to the upper tower part 23. Beginning over the greater part of its longitudinal extent at the lower edge, the middle tower part 22 has a free inner cross-section which is adapted to the lower tower part 21. In the upper end region, the middle tower part 22 has the cross-sectional view Fig. 2 a taper to a smaller free inner cross-section, which is adapted to the upper tower portion 23, wherein the upper tower portion 23 protrudes with its end portion of the lower tower portion 21. However, the largest part of the longitudinal extent of the upper tower part 23 is still telescoped in the interior of the lower tower part 21.

Das mittlere Turmteil 22 weist in etwa die gleiche Länge wie das obere Turmteil 23 auf und die Oberkante des mittleren Turmteils 22 schließt dabei in etwa bündig mit der Oberkante des oberen Turmteils 23 ab. Oberes und mittleres Turmteil 22, 23 sind dabei jeweils fallsicher am unteren Turmteil 21 befestigt. Zwischen oberem und mittlerem Turmteil 22, 23 besteht im einteleskopierten Zustand keine feste Verbindung.The middle tower part 22 has approximately the same length as the upper tower part 23, and the upper edge of the middle tower part 22 terminates approximately flush with the upper edge of the upper tower part 23. Upper and middle tower part 22, 23 are each case securely attached to the lower tower part 21. Between upper and middle tower part 22, 23 there is no fixed connection in the telescoped state.

Die Ausfahrbewegungen des oberen Turmteils 23 erfolgen über ein eigenes Montageseil-Flaschenzugsystem 30. Dieses Montageseil-Flaschenzugsystem 30 verfügt über keinen separaten Antrieb, sondern teilt sich einen gemeinsamen Antrieb 50 mit dem Hubseil-Flaschenzugsystem 40 des Krans 1. Je nach dem, ob das Montageseil-Flaschenzugsystem 30 oder das Hubseil-Flascherizugsystem 40 des Krans 1 angetrieben werden soll, wird die zugehörige Montageseiltrommel 31 oder die Hubseiltrommel 41 mit dem Antrieb 50 gekoppelt. Seiltrommeln 31, 41 und gemeinsamer Antrieb 50 befinden sich dabei vorteilhafterweise auf der unteren Plattform 7 des Krans 1.The extension movements of the upper tower part 23 via its own mounting pulley system 30. This mounting pulley system 30 has via a separate drive, but shares a common drive 50 with the hoist pulley system 40 of the crane 1. Depending on whether the mounting part pulley system 30 or the hoisting cable Flascherizugsystem 40 of the crane 1 is to be driven, the associated mounting roller 31 or the hoist drum 41 is coupled to the drive 50. Cable drums 31, 41 and common drive 50 are advantageously located on the lower platform 7 of the crane. 1

Die Seilrollen 32, 33 des Montageseil-Flaschenzugsystems 30 sind im unteren Bereich des oberen Turmteils 23 und im oberen Bereich des mittleren Turmteils 22 angebracht, so dass das obere Turmteil 23 aus dem mittleren Turmteil 22, und damit auch aus dem unteren Turmteil 21, nach Einschaltung des Montageseil-Flaschenzugsystems 30 herausteleskopiert werden kann.The pulleys 32, 33 of the mounting part pulley system 30 are mounted in the lower part of the upper tower part 23 and in the upper part of the middle tower part 22, so that the upper tower part 23 from the middle tower part 22, and thus also from the lower tower part 21, after Engagement of the mounting part pulley system 30 can be vorelusteleskopiert.

Zum Erreichen einer nächst höheren mittleren Betriebsstellung wird ein Ausgleichsgewicht 9 am Kranlasthaken 6 eingehangen, um den Turm 2 momentenfrei zu stellen. Nach Lösen der Verbindung 61 zwischen oberem und unterem Turmteil 23, 21 wird das obere Turmteil 23 über das Montageseil-Flaschenzugsystem 30 aus einer Position mit großer Längsüberlappung mit dem unteren Turmteil 21 in eine zweite Position mit geringer Längsüberlappung mit dem unteren Turmteil 21, und damit auch mit dem mittleren Turmteil 22, ausgefahren. Diese mittlere Betriebsstellung ist in der Fig. 3 b sowie in der Fig. 5 a als Isometrieansicht und Fig. 5 b als Seitenansicht dargestellt.To achieve a next higher average operating position, a balance weight 9 is attached to the crane lifting hook 6 in order to set the tower 2 torque-free. After loosening the connection 61 between the upper and lower tower parts 23, 21, the upper tower part 23 is moved via the mounting-part pulley system 30 from a position with great longitudinal overlap with the lower tower part 21 to a second position with little longitudinal overlap with the lower tower part 21, and therewith also with the middle tower part 22, extended. This middle operating position is in the Fig. 3 b as well as in the Fig. 5 a as an isometric view and Fig. 5 b shown as a side view.

Zum Ausfahren des oberen Turmteils 23 ist die Montageseitrommel 31 mit dem Antrieb 50 gekoppelt und die Hubseiltrommel 41 vom Antrieb 50 entkoppelt. Das Hubseil 44 kann mit dem Ausfahren des oberen Turmteils 23 von der Hubseiltrommel 41 frei nachlaufen, da mit zunehmender Kranhöhe auch der Bedarf an freier Hubseillänge zunimmt.To extend the upper tower part 23, the mounting guide drum 31 is coupled to the drive 50 and the hoist drum 41 is decoupled from the drive 50. The hoist rope 44 can follow the extension of the upper tower part 23 of the hoist drum 41 freely, since with increasing crane height and the need for free Hubseillänge increases.

Beim Erreichen der in Fig. 5 a, b dargestellten Endposition in der mittleren Betriebsstellung wird das obere Turmteil 23 in seinem unteren Bereich über eine lösbare Querbolzenverbindung 62 mit dem unteren Turmteil 21 fallsicher verriegelt. Das mittlere Turmteil 22 verbleibt gegenüber dem oberen Turmteil unverbunden und lose.When reaching the in Fig. 5 a, b shown end position in the middle operating position, the upper tower portion 23 is latched in its lower portion via a detachable cross bolt connection 62 with the lower tower part 21 iffalls. The middle part of the tower 22 remains unconnected and loose relative to the upper part of the tower.

Das obere Turmteil 23 ist im unteren Endbereich seiner Längserstreckung noch im unteren Turmteil 21 geführt und hier fallsicher befestigt. In einem direkt daran anschließenden kurzen Bereich seiner Längserstreckung ist das obere Turmteil 23 weiterhin im verjüngten Querschnitt des oberen Endbereiches des mittleren Turmteils 22 geführt. Nach dem Ausfahren ragt aber nun der größte Teil der Längserstreckung des oberen Turmteils 23 aus dem unteren und mittleren Turmteil 21, 22 nach oben heraus.The upper part of the tower 23 is still guided in the lower end portion of its longitudinal extent in the lower part of the tower 21 and fastened herefallicher. In a directly adjoining short region of its longitudinal extent, the upper tower part 23 continues to be guided in the tapered cross section of the upper end region of the middle tower part 22. After extension but now projects the largest part of the longitudinal extent of the upper tower part 23 from the lower and middle tower part 21, 22 upwards.

Um das Ausfahren des oberen Turmteils 23 zur Erreichung einer noch höheren Kranlasthakenhöhe fortsetzen zu können, ist es notwendig, einen Zwischenschritt einzulegen. Dieser Zwischenschritt ist in der Fig. 3 c und in den Fig. 6 a, b dargestellt. Dazu wird nach Abhängen des Ausgleichsgewichts 9 der Kranlasthaken 6 über die Laufkatze 5 direkt an den Kranturm 2 gefahren und der Kranlasthaken 6 am mittleren Turmteil 22 eingehangen. Das Montageseil-Flaschenzugsystem 30 ist vom Antrieb 50 entkoppelt und das Hubseil-Flaschenzugsystem 40 ist mit dem Antrieb 50 gekoppelt. Die fallsichere Verbindung 63 des mittleren Turmteils 22 mit dem unteren Turmteil 21 wird gelöst, so dass das mittlere Turmteil 22 nur noch am Kranlasthaken 6 hängt.In order to continue the extension of the upper tower portion 23 to achieve an even higher crane hook height, it is necessary to insert an intermediate step. This intermediate step is in the Fig. 3c and in Figs. 6 a, b shown. For this purpose, after suspending the balancing weight 9, the crane lifting hook 6 is moved directly over the trolley 5 to the crane tower 2 and the crane lifting hook 6 is attached to the middle tower part 22. The mounting pulley system 30 is decoupled from the drive 50 and the hoist pulley system 40 is coupled to the drive 50. The fail-safe connection 63 of the central tower part 22 with the lower tower part 21 is released so that the middle tower part 22 only hangs on the crane hook 6.

Nach Einschaltung des Antriebs 50 wird über das Hubseil-Flaschenzugsystem 40 des Kranlasthakens 6 der mittlere Turmteil 22 entlang des unteren Turmteils 21 und des oberen Turmteils 23 nach oben gezogen, und zwar genauer gesagt aus seiner unteren Position (Fig. 5 a, b), bei der das mittlere Turmteil 22 eine große Längsüberlappung mit dem unteren Turmteil 21 und eine geringe Längsüberlappung mit dem oberen Turmteil 23 aufgewiesen hat, in eine obere Position (Fig. 6 a, b), bei der das mittlere Turmteil 22 nun nur noch eine kleine Längsüberlappung mit dem unteren Turmteil 21 und eine große Längsüberlappung mit dem oberen Turmteil 23 aufweiset. In der in den Fig. 6 a, b dargestellten oberen Position des mittleren Turmteils 22 liegt die Oberkante des mittleren Turmteils 22 wieder in etwa mit der Oberkante des oberen Turmteils 23 bündig. Während des Hochziehens des mittleren Turmteils mit dem Kranlasthaken ist es notwendig, dass das Montageseil 34 von der Montageseiltrommel 31 frei nachlaufen kann, denn die Montageseilrollen 33 am oberen Ende des mittleren Turmteils 22 vergrößern ihren Abstand zu den ortsfest bleibenden Montageseilrollen 32 am unteren Ende des oberen Turmteils 23, wodurch der Bedarf an freier Montageseillänge größer wird. In seiner oberen Position gemäß Fig. 6 a, b wird das mittlere Turmteil 22 in seinem unteren Bereich wieder an das untere Turmteil 21 in dessen oberem Bereich durch eine Querbolzenverbindung 64 fallsicher verriegelt.After the drive 50 is activated, the middle tower part 22 is pulled upwards along the lower tower part 21 and the upper tower part 23 via the hoist rope tackle system 40 of the crane lifting hook 6, specifically from its lower position (FIG. Fig. 5 a, b ), in which the middle tower part 22 has a large longitudinal overlap with the lower tower part 21 and a slight longitudinal overlap with the upper tower part 23, into an upper position (FIG. Fig. 6 a, b ), in which the middle tower part 22 now has only a small longitudinal overlap with the lower tower part 21 and a large longitudinal overlap with the upper tower part 23. In the in the Fig. 6 a, b shown upper position of the central tower portion 22, the upper edge of the central tower portion 22 is flush again approximately with the upper edge of the upper tower portion 23. During the pulling up of the central tower portion with the crane hook, it is necessary that the mounting member 34 can run freely from the mounting roller 31, because the mounting rollers 33 at the upper end of the central tower portion 22 increase their distance to the stationary mounting rollers 32 at the lower end of the upper Tower part 23, whereby the need for free mounting track length is greater. In its upper position according to Fig. 6 a, b the middle tower part 22 is in its lower area again locked to the lower tower part 21 in the upper area by a transverse bolt connection 64 iffalls.

Um nun die höchste Betriebsstellung (Fig. 7 a, b) zu erreichen, wird entsprechend des Übergangs von der ersten (Fig. 3 a) zur zweiten (Fig. 3 b) Phase in Fig. 3, also entsprechend des Übergangs von Fig. 4 zu Fig. 5, das obere Turmteil 23 aus dem mittleren Turmteil 22 über das Montageseil-Flaschenzugsystem 30 herausteleskopiert. Dazu wird der Turm 2 durch Einhängen eines Ausgleichsgewichtes 9 am Kranlasthaken 6 wieder momentenfrei gestellt, der Antrieb 50 mit der Montageseiltrommel 31 gekoppelt und von der Hubseiltrommel 41 entkoppelt. Das obere Turmteil 23 wird nun so weit aus dem mittleren' Turmteil 22 herausteleskopiert, dass das obere Turmtell 23 vollständig aus dem unteren Turmteil 21 herausgefahren ist und nur noch mit dem mittleren Turmteil 22 in dessen oberem Bereich überlappt. In der vollständig ausgefahrenen Stellung gemäß Fig. 7 a, b ist das obere Turmteil 23 in seinem unteren Bereich nun fallsicher am mittleren Turmteil 22 in dessen oberem Bereich durch eine Querbolzenverbindung 65 fallsicher verriegelt. Eine direkte Verbindung zwischen oberem Turmteil 23 und unterem Turmteil 21 besteht nicht mehr.To now the highest operating position (Fig. 7 a, b ), according to the transition from the first ( Fig. 3 a ) to the second ( Fig. 3 b ) Phase in Fig. 3 , so according to the transition from Fig. 4 to Fig. 5 , the upper tower part 23 is telescoped out of the middle tower part 22 via the mounting part pulley system 30. For this purpose, the tower 2 is again provided torque-free by hanging a balance weight 9 on the crane hook 6, the drive 50 coupled to the mounting roller 31 and decoupled from the hoist drum 41. The upper part of the tower 23 is now telescoped so far out of the middle part of the tower 22 that the upper tower 23 has completely moved out of the lower part of the tower 21 and only overlaps with the middle part of the tower 22 in its upper area. In the fully extended position according to Fig. 7 a, b is the upper tower part 23 in its lower part now if safe locked at the middle tower part 22 in the upper region by a cross bolt connection 65 if safe. A direct connection between the upper tower part 23 and the lower tower part 21 no longer exists.

Während das mittlere Turmteil 22 in der unteren Betriebsstellung (Fig. 4 a, b) und In der mittleren Betriebsstellung (Fig. 5 a, b) ein nicht tragendes Element, das vom oberen Turmteil 23 lose ist, darstellt, ist es in der höchsten Betriebsstellung (Fig. 1 und Fig. 7 a, b) zu einem tragenden Verbindungselement geworden, das eine zusätzliche Ausfahrhöhe des Krans 1 ermöglicht.While the middle tower part 22 in the lower operating position ( Fig. 4 a, b ) and in the middle operating position ( Fig. 5 a, b ) represents a non-supporting element which is loose from the upper tower part 23, it is in the highest operating position ( Fig. 1 and Fig. 7 a, b ) has become a load-bearing connection element which allows an additional extension height of the crane 1.

Abschließend soll erwähnt werden, dass die Fig. 1 bis 7 b ein Ausführungsbeispiel der vorliegenden Erfindung darstellen, auf die die vorliegende Erfindung aber keinesfalls beschränkt ist. Die Erfindung ist indessen auch auf alle anderen Krantypen mit einem teleskopierbaren Turm, wie Kräne in Vollmastkonstruktion (zum Beispiel Autokräne), stationäre Kräne (zum Beispiel auf Fundamentanker), Kräne mit beliebigen Auslegerkonstruktionen (Laufkatzausleger entsprechend Fig. 4 a bis 7 b, aber auch Wippausleger, Knickausleger etc.), Flat-Top Kräne, etc. anwendbar.Finally, it should be mentioned that the Fig. 1 to 7 b illustrate an embodiment of the present invention, to which the present invention is by no means limited. However, the invention is also applicable to all other types of crane with a telescopic tower, such as cranes in Vollmastkonstruktion (for example, cranes), stationary cranes (for example, on foundation anchors), cranes with any boom designs (trolley boom accordingly Fig. 4 a to 7 b , but also luffing jib, cantilever etc.), flat-top cranes, etc. applicable.

Claims (17)

  1. A crane with a tower (2) which is assembled from a plurality of tower parts (21,22,23) guided slidably in one another and which carries a jib (3), wherein the tower (2) comprises a stationary lower tower part (21) and an upper tower part (23) can slide longitudinally on the lower tower part (21), and wherein to increase the tower height the upper tower part (23) can be extended from a first position with considerable longitudinal overlap with the lower tower part (21) into a second position with little longitudinal overlap,
    characterised by
    a central tower part (22) which is longitudinally displaceable along the lower tower part (21) and the upper tower part (23) to extend the central tower part (22) from a lower position with considerable longitudinal overlap with the lower tower part (21) into an upper position with little longitudinal overlap,
    and with respect to which the upper tower part (23) is longitudinally displaceable to extend the upper tower part (23) into a third position with longitudinal overlapping with the central tower part (22) and without longitudinal overlapping with the lower tower part (21).
  2. A crane according to Claim 1, characterised in that over at least one portion of its longitudinal extension direction the central tower part (22) embraces the lower tower part (21) and the upper tower part (23) in cross-section.
  3. A crane according to Claim 1 or 2, characterised in that the lower tower part (21) forms with its inside a longitudinal guide for the upper tower part (23).
  4. A crane according to any one of Claims 1 to 3, characterised in that the lower tower part (21) forms with its outside a longitudinal guide for the central tower part (22).
  5. A crane according to any one of Claims 1 to 4, characterised in that the upper tower part (23) forms with its outside a longitudinal guide for the central tower part (22).
  6. A crane according to any one of Claims 1 to 5, characterised in that in its upper longitudinal portion the central tower part (22) forms with its inside a longitudinal guide for the upper tower part (23).
  7. A crane according to any one of Claims 1 to 6, characterised in that the upper tower part (23) is locked in its first and/or second position on the lower tower part (21) so as to prevent it from dropping, preferably by means of a releasable stud cross-connection (65) between the tower parts (21,22,23).
  8. A crane according to any one of Claims 1 to 7, characterised in that the central tower part (22) is locked in its upper position on the lower tower part (21) so as to prevent it from dropping, preferably by means of a releasable stud cross-connection (65) between the tower parts (21,22,23).
  9. A crane according to any one of Claims 1 to 8, characterised in that the central tower part (22) is disengaged with respect to the upper tower part (23) in its first and second positions.
  10. A crane according to any one of Claims 1 to 9, characterised in that the upper tower part (23) is locked in its third position with the central tower part (22) so as to prevent it from dropping, preferably by means of a releasable stud cross-connection (65) between the tower parts (21,22,23).
  11. A crane according to any one of Claims 1 to 10, characterised by a first wire-rope pulley block system (30) for extending the upper tower part (23) into its second and third positions.
  12. A crane according to Claim 11, characterised in that the cable of the first wire-rope pulley block system (30) is deflected a number of times between lower cable pulleys (32) in the lower region of the upper tower part (23) and upper cable pulleys (33) in the upper region of the central tower part (22).
  13. A crane according to any one of Claims 1 to 12, characterised by a second wire-rope pulley block system (40) for raising and lowering the crane hook (6).
  14. A crane according to Claim 13, characterised in that the first (30) and second (40) wire-rope pulley block systems have a common drive unit (50) which can be coupled alternately with the first (30) or second (40) wire-rope pulley block system.
  15. A crane according to Claim 14, characterised in that to extend the upper tower part (23) the first wire-rope pulley block system (30) is coupled to the drive unit (50) and the second wire-rope pulley block system (40) is uncoupled from the drive unit (50) so that the second cable (44) freely trails.
  16. A crane according to any one of Claims 13 to 15, characterised in that to raise the central tower part (22) the second wire-rope pulley block system (40) is coupled to the drive unit (50) and the first wire-rope pulley block system (30) is uncoupled from the drive unit (50) so that the first cable (34) freely trails.
  17. A method for extending a crane tower (2) according to any one of Claims 1 to 16, characterised by the following steps:
    a) the upper tower part (23) is extended from a first position with considerable longitudinal overlap with the lower tower part (21) into a second position with little longitudinal overlap;
    b) the upper tower part (23) is locked on the lower tower part (21) so as to prevent it from dropping;
    c) the central tower part (22) is raised from a lower position with considerable longitudinal overlap with the lower tower part (21) into an upper position with little longitudinal overlap;
    d) the central tower part (22) is locked on the lower tower part (21) so as to prevent it from dropping;
    e) the upper tower part (23) is extended from a second position into a third position with longitudinal overlap with the central tower part (22) and without longitudinal overlap with the lower tower part (21);
    f) the upper tower part (23) is locked on the central tower part (22) so as to prevent it from dropping.
EP09003429A 2008-03-12 2009-03-10 Crane with telescopic tower Active EP2100843B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008013828A DE102008013828A1 (en) 2008-03-12 2008-03-12 Crane with telescopic tower

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EP2100843B1 true EP2100843B1 (en) 2010-12-29

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EP (1) EP2100843B1 (en)
AT (1) ATE493365T1 (en)
DE (2) DE102008013828A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3495312A1 (en) * 2017-12-09 2019-06-12 Klaus Rösel Lifting device and method for using the lifting device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1168617B (en) 1961-02-14 1964-04-23 Weitz S A Ets Tower crane
FR2039540A5 (en) * 1969-04-11 1971-01-15 Noly Jean
FR2357472A1 (en) 1976-07-09 1978-02-03 Potain Sa Tower crane vertical telescoping mechanism - has upper tower sliding up columns of telescoping cage larger than main tower
FR2434109A1 (en) 1978-07-28 1980-03-21 Potain Sa Crane with telescopic tower - has rear tie and compensation ropes holding jib permanently horizontal during erection
DE4107344A1 (en) * 1991-03-07 1992-09-10 Liebherr Werk Biberach Gmbh TELESCOPICABLE TOWER OF A MOBILE OR TOWER TURNING CRANE

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DE502009000246D1 (en) 2011-02-10
ATE493365T1 (en) 2011-01-15
EP2100843A1 (en) 2009-09-16

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