EP0132572B1 - Crane with a telescopic tower - Google Patents

Crane with a telescopic tower Download PDF

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Publication number
EP0132572B1
EP0132572B1 EP84106894A EP84106894A EP0132572B1 EP 0132572 B1 EP0132572 B1 EP 0132572B1 EP 84106894 A EP84106894 A EP 84106894A EP 84106894 A EP84106894 A EP 84106894A EP 0132572 B1 EP0132572 B1 EP 0132572B1
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EP
European Patent Office
Prior art keywords
secured
rope
girder section
jib
around
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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EP84106894A
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German (de)
French (fr)
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EP0132572A1 (en
Inventor
Horst Zerza
Heinz Rieder
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Liebherr Werk Bischofshofen GmbH
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Liebherr Werk Bischofshofen GmbH
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Priority to AT84106894T priority Critical patent/ATE25230T1/en
Publication of EP0132572A1 publication Critical patent/EP0132572A1/en
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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
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/342—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes with telescopic elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib

Definitions

  • the invention relates to a crane with a telescopic tower attached to an uppercarriage or the rotating platform of a portal, the extendable part of which is articulated at its upper end to the inner support part of the jib, at the outer end of which the outer support part of the ejector is articulated, with an on Head end of the extendable part fastened counter jib, which carries a rope pulley at its free end, over which a rear guy rope runs from its attachment to the uppercarriage or on the rotating platform to a fixed point at the outer end of a boom support pivotally mounted at the head end of the extendable part, with two others Guy ropes attached to the anchor point of the ejector support, of which the other end of the first guy rope is attached to the outer area of the inner support member and the other end of the second guy rope is attached to the end of a central support, to which a third guy rope is attached, the other end of which is in the outer area of the outer Sluggish part of the boom is fastened, and
  • the counter-jib is pivoted counterclockwise around its articulated connection with the head piece, whereby the jib support is also pivoted counterclockwise, so that it tightens the inner support part via the tightening first guy rope pivoted from its position parallel to the tower and the outer support part articulated to the inner support part, which is held in a horizontal position by the cable, maintains its horizontal position when pivoted.
  • a mounting rope is attached with its ends to the outer support part and the lower tower part and via deflection rollers at the upper end of the lower tower part, at the lower and upper ends of the extendable part, guided on the inner support part and at the upper end of the intermediate support, so that the inner and outer support parts are opened and closed in the manner of an accordion simultaneously with the extension and retraction of the extendable part.
  • the outer support part which is formed by a central support part, is attached to the still an end-side support part is articulated, can be lowered relative to the inner support part parallel to the tower into a horizontal position by the mounting thread, so that the inner and outer support parts can be pivotally bolted to one another in the region of their lower straps. If the extendable part of the telescopic tower is now extended, the inner support part is pivoted counterclockwise into its horizontal position by tightening the corresponding guy ropes.
  • the outer support member articulated in the inner support member can be pivoted relative to the inner support member regardless of its pivoting movement. This makes it possible to avoid obstacles when erecting or pivoting.
  • the outer boom section can also be pulled up during operation to drive over obstacles.
  • the outer support part can also be pulled up in order to reach a wind-free position when there are obstacles when it is out of operation.
  • ballasting devices are lowered in the vertical position.
  • Such a luffing crane enables the ballast to be picked up and set down without pivoting, so that ballasting is simplified.
  • all of the ballasting devices described above have the disadvantage that they make the basic device more expensive due to the required additional devices.
  • the object of the invention is therefore to design the known crane of the type specified at the outset in such a way that it can ballast itself without complex additional devices.
  • this object is achieved in that the rope is guided over two deflecting rollers mounted coaxially at the rear end region of the counter jib rigidly connected to the extendable part and between them over the roller of a bottom block, which carries a ballast hook and can be moved to a stop, and in that the swivel mounted tower is equipped with a rocker drive.
  • the assembly winch and the associated rope are assigned a second function as ballasting device.
  • the end of the rope is anchored to the tower or a support part of the boom, so that the ballasting hook can be brought over the ballast to be picked up by rocking the not yet telescoped tower.
  • the bottom block can be raised and lowered and the ballast can be picked up by actuating the assembly winch.
  • the ballast By rocking and swiveling the tower, the ballast can be brought into its correct position on the rotating platform and set down.
  • the crane shown in Fig. 1 consists of a portal 1, which is connected to the rotating platform 2 via a conventional rotary connection.
  • the rotating stage 2 is provided with two mutually parallel, each arranged in a triangular shape and projecting at its front end of beams 3, between which the lower part 4 of the telescopic tower is pivotally mounted in the manner shown. In its vertical position shown, the lower part 4 is locked in a known side.
  • a pulley 5 with a winch 6 is provided for erecting the lower part 4 of the tower.
  • the upper part 7 of the tower can be extended from the lower part 4 via hydraulic devices or a telescopic pulley block.
  • the inner support part 9 of the boom is connected to the upper end of the extendable part 7 in the joint 8.
  • the outer support part 11 is connected to the inner support part 9 by the joint 10 in the region of the lower chords of both support parts.
  • the inner and outer support parts 9, 11 are held in their aligned horizontal position by guy ropes.
  • the rear guy rope 12 runs from its anchor 13 on the rotating platform 2 via the roller 14 to the fixed point 15 at the upper end of the A-shaped boom support 16, which is articulated with the hinge axis 8 at the upper end of the extendable part 7.
  • a first guy cable 17 runs from the fixed point 15 to the fixed point 18 in the region of the outer end of the inner support part 9.
  • a second guy cable 19 runs from the fixed point 15 of the boom support 16 to a fixed point 20 at the upper end of the center support 21, which is about the hinge axis 1 O is articulated between the inner and outer support parts.
  • a third guy rope 22 runs from the fixed point 20 to the fixed point 23 located in the region of the outer end of the outer carrier part 11.
  • the roller 14 is mounted on the rear end of the counter jib 24, which is rigidly connected in the manner shown to the extendable part 7 of the tower.
  • the mounting screw 25 is arranged on a bracket.
  • a cable 26 runs from the assembly winch 25, which is driven by an electric motor, to the deflection pulleys 27, 27 ', which are spaced parallel and coaxially in the front area of the counter-jib 24, and via the cable pulley of the lower block 28, which carries the crane hook 29 for receiving the ballast.
  • the cable 26 runs from the roller 27 'via the deflection rollers 30, 31 on the inner support part to a deflection roller 32 which is mounted at the upper end of the central support.
  • the cable 26 is guided to the roller 33 on the outer support part via the roller 32 and from this back to the fixed point 20 at the outer end of the central support.
  • This reeving of the rope corresponds to that according to FIG. 1B.
  • Other possible reeving of the rope 26 are shown in FIGS. 1A and 1C.
  • ballast weights 35 can then be deposited in the manner shown on the rear end of the rotating platform 2 for ballasting.
  • the front end of the rope of the Möntagewinde is fixed at its fixed point on the outer support part of the boom or the central support and reeved in the manner shown in FIG. 1.
  • the articulated connection 10 is made with the inner support part 9, so that the outer support part 11 in the manner shown in full lines from FIG. 3 in a horizontal position with the parallel to the erected and not yet telescoped tower inner support member 9 is connected.
  • the inner support part 9 is pivoted counterclockwise in the manner shown in dashed lines.
  • the outer support part 11 can be pivoted in the desired manner by corresponding actuation of the mounting screw 25.

Abstract

1. A crane comprising a telescopic tower (4, 7), which is secured to a revolving superstructure or to the rotating deck (2) of a portal (12) and has an extensible part (7), which at its upper end is articulatedly connected to the inner girder section (9) of the jib, wherein an outer girder section (11) of the jib is hinged to the inner girder section (9) at the outer end thereof, comprising a counterbalancing jib (24), which is secured to the top end of the extensible part and has a free end, wherein a rear guy rope (12), which is fixed (at 13) to the revolving superstructure or to the rotating deck and from said fixing point extends around said free end to a fixed point (15) at the outer end of a jib support (16), which is hinged to the top end of the extensible part, comprising two additional forward guy ropes (17, 19), which are secured to the fixed point (15) of the jib support, wherein the end of the first (17) of said additional guy ropes is secured to the outer portion (18) of the inner girder section, the other end of the second guy rope is secured to the end (24) of a central support (21), a third guy rope (22) is secured to the end (24), and the other end of the third guy rope (22) is secured to the outer portion (23) of the outer girder section of the beam, and comprising a rope (26), which is secured to the outer girder section and is trained around a pulley (32) at the end of the central support and around a deflecting pulley (31) of the inner girder section and around additional deflecting pulleys (27, 27', 30) and then extends to an assembling winch (25), by which the outer girder section is pivotally movable relative to the inner girder section of the jib, characterized in that the rope (26) is trained around two coaxial deflecting pulleys (27, 27'), which are rotatably mounted on the rear end portion of the counter-balancing jib (24), which is rigidly connected to the extensible part (7), and the rope (26) is trained between said deflecting rollers (27, 27') around a pulley of a block (28), which carries a ballast hook and is movable as far as to a stop, and the tower (4, 7) is pivoted and provided with a luffing drive (5, 6).

Description

Die Erfindung betrifft einen Kran mit auf einem Oberwagen oder der Drehbühne eines Portals befestigtem teleskopierbarem Turm, dessen ausfahrbares Teil an seinem oberen Ende gelenkig mit dem inneren Trägerteil des Auslegers verbunden ist, an dessen äusserem Ende das äussere Trägerteil des Ausiegers angelenkt ist, mit einem am Kopfende des ausfahrbaren Teils befestigten Gegenausleger, der an seinem freien Ende eine Seilrolle trägt, über die ein hinteres Abspannseil von seiner Befestigung am Oberwagen oder an der Drehbühne zu einem Festpunkt am äusseren Ende einer am Kopfende des ausfahrbaren Teils schwenkbar gelagerten Auslegerstütze verläuft, mit zwei weiteren am Festpunkt der Ausiegerstütze befestigten Abspannseilen, von denen das andere Ende des ersten am äusseren Bereich des inneren Trägerteils und das andere Ende des zweiten Abspannseils am Ende einer Mittelstütze befestigt sind, an dem ein drittes Abspannseil befestigt ist, dessen anderes Ende im äusseren Bereich des äusseren Trägerteils des Auslegers befestigt ist, und mit einem am äusseren Trägerteil befestigten Seil, das über eine endseitige Rolle der Mittelstütze und eine Umlenkrolle des inneren Trägerteils und weitere Umlenkrollen zu einer Montagewinde läuft, über die sich das äussere Trägerteil relativ zu dem inneren Trägerteil des Auslegers verschwenken lässt.The invention relates to a crane with a telescopic tower attached to an uppercarriage or the rotating platform of a portal, the extendable part of which is articulated at its upper end to the inner support part of the jib, at the outer end of which the outer support part of the ejector is articulated, with an on Head end of the extendable part fastened counter jib, which carries a rope pulley at its free end, over which a rear guy rope runs from its attachment to the uppercarriage or on the rotating platform to a fixed point at the outer end of a boom support pivotally mounted at the head end of the extendable part, with two others Guy ropes attached to the anchor point of the ejector support, of which the other end of the first guy rope is attached to the outer area of the inner support member and the other end of the second guy rope is attached to the end of a central support, to which a third guy rope is attached, the other end of which is in the outer area of the outer Sluggish part of the boom is fastened, and with a rope fastened to the outer support part, which runs over an end roller of the central support and a deflection roller of the inner support part and further deflection rollers to an assembly thread, via which the outer support part pivot relative to the inner support part of the boom leaves.

Bei einem aus der DE-OS 2 614 223 bekannten Kran mit teleskopierbarem Turm ist der Untergurt des inneren Trägerteils des Auslegers an einem Kopfstück des ausfahrbaren Teils angelenkt und parallel zu dem Untergurt verläuft ein Seil, dessen Enden derart an dem Kopfstück und im Abstand von der gelenkigen Verbindung der inneren und äusseren Trägerteile an dem inneren Ende des äusseren Tr,ägerteils befestigt sind, dass der Untergurt und das Seit mit den zwischen den Gelenken und Befestigungspunkten des Seils liegenden Stützstrecken ein Parallelogramm bilden. Wird nun durch Ausfahren des ausfahrbaren Teils des Turms das hintere Abspannseil gespannt, wird der-Gegenausleger um seine gelenkige Verbindung mit dem Kopfstück im Gegenuhrzeigersinn verschwenkt, wodurch auch die Auslegerstütze im Gegenuhrzeigersinn verschwenkt wird, so dass diese über das sich straffende erste Abspannseil den inneren Trägerteil aus seiner zu dem Turm parallelen Lage verschwenkt und das an das innere Trägerteil angelenkte äussere Trägerteil, das durch das Seil in einer horizontalen Lage gehalten ist, beim Verschwenken seine horizontale Lage beibehält.In a crane with telescopic tower known from DE-OS 2 614 223, the lower chord of the inner support part of the boom is articulated on a head piece of the extendable part and a rope runs parallel to the lower chord, the ends of which are in this way on the head piece and at a distance from it Articulated connection of the inner and outer support parts are fastened to the inner end of the outer support part so that the lower flange and the side form a parallelogram with the support sections lying between the joints and fastening points of the rope. If the rear guy rope is now tensioned by extending the extendable part of the tower, the counter-jib is pivoted counterclockwise around its articulated connection with the head piece, whereby the jib support is also pivoted counterclockwise, so that it tightens the inner support part via the tightening first guy rope pivoted from its position parallel to the tower and the outer support part articulated to the inner support part, which is held in a horizontal position by the cable, maintains its horizontal position when pivoted.

Bei einem aus der DE-OS 2 914 265 bekannten Kran mit teleskopierbarem Turm wird nach Aufrichten des Turms mit angeklappten inneren und äusseren Trägerteilen des Auslegers zunächst das äussere Trägerteil um die gelenkige Verbindung im Bereich der Obergurte durch das an diesem befestigte Teleskopierseil bis in seine waagerechte Stellung herabgelassen, so dass die gelenkige Verbindung im Bereich der Untergurte beider Trägerteile durch Verbolzen hergestellt und die gelenkige Verbindung im Bereich der Obergurte gelöst werden kann. Zwischen dem äusseren Trägerteil und einer nach hinten auskragenden Stütze des ausfahrbaren Teils des Turms ist ein über eine Rolle des inneren Trägerteils laufendes Seil gespannt, so dass nach Ausklinken und Umsetzen des Teleskopierseils, Ausfahren des-ausfahrbaren Teils und Spannen des hinteren Abspannseils das innere Trägerteil um seine gelenkige Verbindung am oberen Ende des ausfahrbaren Teils im Gegenuhrzeigersinn verschwenkt wird. Durch diese Verschwenkung verkürzt sich das Seiltrum zwischen der Seilrolle am inneren Trägerteil und dem Befestigungspunkt an der nach hinten auskragenden Stütze um denselben Betrag, um den sich das Seiltrum zwischen der Umlenkrolle und dem vorderen Trägerteil verlängert, so dass dieses beim Ausfahren des ausfahrbaren Teils relativ zu dem inneren Trägerteil im Uhrzeigersinn bis in seine mit dem inneren Trägerteil fluchtende Stellung verschwenkt wird.In a crane with a telescopic tower known from DE-OS 2 914 265, after erecting the tower with the inner and outer support parts of the boom folded, the outer support part is first around the articulated connection in the area of the upper chords through the telescopic cable attached to it in its horizontal direction Lowered position so that the articulated connection in the area of the lower chords of both carrier parts can be made by means of bolts and the articulated connection in the area of the upper chords can be released. Between the outer support part and a rearward-projecting support of the extendable part of the tower, a rope running over a roll of the inner support part is tensioned, so that after releasing and relocating the telescopic cable, extending the extendable part and tensioning the rear guy rope, the inner support part its articulated connection at the upper end of the extendable part is pivoted counterclockwise. As a result of this pivoting, the rope strand between the rope pulley on the inner support part and the fastening point on the support projecting to the rear is shortened by the same amount by which the rope strand between the deflection roller and the front support part is lengthened, so that this extends relatively when the extendable part is extended the inner support part is pivoted clockwise until it is in alignment with the inner support part.

Bei einem aus der DE-OS 2 831 286 bekannten Kran mit teleskopierbarem Turm ist ein Montageseil mit seinen Enden an dem äusseren Trägerteil und dem unteren Turmteil befestigt und über Umlenkrollen am oberen Ende des unteren Turmteils, an den unteren und oberen Enden des ausfahrbaren Teils, am inneren Trägerteil und an dem oberen Ende der Zwischenstütze geführt, so dass gleichzeitig mit dem Aus- und Einfahren des ausfahrbaren Teils die inneren und äusseren Trägerteile zieharmonikaartig auf- und eingeklappt werden.In a crane with telescopic tower known from DE-OS 2 831 286, a mounting rope is attached with its ends to the outer support part and the lower tower part and via deflection rollers at the upper end of the lower tower part, at the lower and upper ends of the extendable part, guided on the inner support part and at the upper end of the intermediate support, so that the inner and outer support parts are opened and closed in the manner of an accordion simultaneously with the extension and retraction of the extendable part.

Bei allen vorstehend beschriebenen Kränen erfolgt beim Aufrichten nach Ablassen des äusseren Trägerteils eine aufgrund der Seilgeometrie vorgegebene gleichzeitige Verschwenkung der inneren und äusseren Trägerteile bis in deren fluchtende Stellung und beim Ablassen in umgekehrter Weise, so dass sich bei der Montage Schwierigkeiten ergeben können, wenn sich Hindernisse in dem nicht veränderbaren Schwenkbereich der Trägerteile des Auslegers befinden.In all cranes described above, when erecting after lowering the outer support part, a simultaneous pivoting of the inner and outer support parts into their aligned position, given on the basis of the cable geometry, takes place and when lowering in the reverse manner, so that difficulties can arise during assembly if there are obstacles are in the non-changeable swivel range of the support parts of the boom.

Bei einem aus der DE-GMS 8 009 033 bekannten Kran der eingangs angegebenen Art sind die vorstehend beschriebenen Schwierigkeiten bei der Montage dadurch vermieden, dass bei aufrechtstehendem Turm mit zusammengeschobenen Teilen zunächst das äussere Trägerteil, das durch ein mittleres Trägerteil gebildet ist, an das noch ein endseitiges Trägerteil angelenkt ist, relativ zu dem zu dem Turm parallelen inneren Trägerteil bis in eine waagerechte Stellung durch die Montagewinde abgelassen werden kann, so dass die inneren und äusseren Trägerteile im Bereich ihrer Untergurte gelenkig miteinander verbolzt werden können. Wird nun das ausfahrbare Teil des teleskopierbaren Turms ausgefahren, wird durch Straffung der entsprechenden Abspannseile das innere Trägerteil im Gegenuhrzeigersinn in seine waagerechte Stellung verschwenkt. Durch entsprechende Betätigung der Montagewinde kann gleichzeitig mit dem Ausfahren des ausfahrbaren Teils des Turms oder nach dem Ausfahren, je nachdem wie die örtlichen Gegebenheiten es erfordern, das in das innere Trägerteil angelenkte äussere Trägerteil unabhängig von dessen Schwenkbewegung relativ zu diesem verschwenkt werden. Damit besteht die Möglichkeit, beim Aufrichten oder auch beim Verschwenken Hindernisse zu umfahren. Im Betrieb besteht die Möglichkeit, das äussere Trägerteil hochzuschwenken und den Kran mit entsprechend verkürztem Ausleger zu benutzen. Das äussere Auslegerteil lässt sich auch im Betrieb zum Überfahren von Hindernissen hochziehen. Schliesslich kann das äussere Trägerteil auch hochgezogen werden, um, wenn Hindernisse vorhanden sind, bei Ausserbetriebstellung eine windfreie Stellung zu erreichen.In a crane of the type specified at the beginning of DE-GMS 8 009 033, the above-described difficulties in assembly are avoided in that when the tower is upright with the parts pushed together, the outer support part, which is formed by a central support part, is attached to the still an end-side support part is articulated, can be lowered relative to the inner support part parallel to the tower into a horizontal position by the mounting thread, so that the inner and outer support parts can be pivotally bolted to one another in the region of their lower straps. If the extendable part of the telescopic tower is now extended, the inner support part is pivoted counterclockwise into its horizontal position by tightening the corresponding guy ropes. By appropriate actuation of the assembly screw can simultaneously with the extension of the extendable part of the tower or after extension, depending on the local conditions, the outer support member articulated in the inner support member can be pivoted relative to the inner support member regardless of its pivoting movement. This makes it possible to avoid obstacles when erecting or pivoting. During operation, there is the possibility of swiveling the outer support part up and locking the crane accordingly shortened boom to use. The outer boom section can also be pulled up during operation to drive over obstacles. Finally, the outer support part can also be pulled up in order to reach a wind-free position when there are obstacles when it is out of operation.

Bei der Montage dieses bekannten Krans ist es erforderlich, auf das hintere Ende der Drehbühne einen Gegenballast als Gegengewicht für den Ausleger abzusetzen. Hierzu sind besondere Hebezeuge erforderlich, die einen zusätzlichen Investitionsaufwand erfordern.When assembling this known crane, it is necessary to place a counterweight on the rear end of the rotating platform as a counterweight for the boom. This requires special hoists that require additional investment.

Um den Gegenballast auf der Drehbühne abzusetzen, ist es bekannt, an der Drehbühne oder an dem Turmunterteil einen besonderen Schwenkarm mit eigenem Ballastierhilfsantrieb vorzusehen. Weiterhin ist es bekannt, statt des eigenen Ballastierhilfsantriebs den Ballast mit Hilfe des Hub- oder Montageseils zu heben (DE-B 2 101 841). Schliesslich ist es bekannt, am hinteren Ende der Drehbühne einen Wippkran anzuordnen, der mit Hilfe des Teleskopweges des Turms oder über einen besonderen Abspannflaschenzug betätigtwird (DE-A 2 615 359). in einer bestimmten Höhe besitzt dieser Wippkran eine Drehachse, über die der Schwenkarm nach hinten abdreht, den Ballast aufnimmt und sich senkrecht stellt. In der senkrechten Position wird der Wipparm und der Ballast abgelassen. Ein derartiger Wippkran ermöglicht ein Aufnehmen und Absetzen des Ballasts ohne Verschwenken, so dass das Ballastieren vereinfacht ist. Sämtliche vorbeschriebenen Ballastiervorrichtungen weisen jedoch den Nachteil auf, dass sie durch die erforderlichen Zusatzeinrichtungen das Grundgerät verteuern.In order to deposit the counter ballast on the rotating platform, it is known to provide a special swivel arm with its own ballasting auxiliary drive on the rotating platform or on the lower part of the tower. It is also known to lift the ballast with the aid of the lifting or assembly rope instead of the own ballasting auxiliary drive (DE-B 2 101 841). Finally, it is known to arrange a luffing crane at the rear end of the rotating platform, which is operated using the telescopic path of the tower or via a special guy block (DE-A 2 615 359). At a certain height, this luffing crane has an axis of rotation through which the swivel arm turns backwards, picks up the ballast and stands vertically. The rocker arm and ballast are lowered in the vertical position. Such a luffing crane enables the ballast to be picked up and set down without pivoting, so that ballasting is simplified. However, all of the ballasting devices described above have the disadvantage that they make the basic device more expensive due to the required additional devices.

Aufgabe der Erfindung ist es daher, den bekannten Kran der eingangs angegebenen Art so auszugestalten, dass er ohne aufwendige Zusatzeinrichtungen sich selbst ballastieren kann.The object of the invention is therefore to design the known crane of the type specified at the outset in such a way that it can ballast itself without complex additional devices.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass das Seil über zwei gleichachsig am hinteren Endbereich des steif mit dem ausfahrbaren Teil verbundenen Gegenauslegers gelagerte Umlenkrollen und zwischen diesen über die Rolle einer Unterflasche geführt ist, die einen Ballasthaken trägt und sich auf Anschlag fahren lässt, und dass der schwenkbar gelagerte Turm mit einem Wippantrieb versehen ist.According to the invention, this object is achieved in that the rope is guided over two deflecting rollers mounted coaxially at the rear end region of the counter jib rigidly connected to the extendable part and between them over the roller of a bottom block, which carries a ballast hook and can be moved to a stop, and in that the swivel mounted tower is equipped with a rocker drive.

Bei dem erfindungsgemässen Kran wird der Montagewinde und dem zugehörigen Seil neben der Verschwenkung des äusseren Trägerteils des Auslegers eine zweite Funktion als Ballastiereinrichtung zugewiesen. Das Ende des Seils wird an dem Turm oder einem Trägerteil des Auslegers verankert, so dass der Ballastierhaken durch Wippen des noch nicht teleskopierten Turms über den aufzunehmenden Ballast gebracht werden kann. Durch Betätigung der Montagewinde lässt sich die Unterflasche heben und senken und der Ballast aufnehmen. Durch Wippen und Schwenken des Turms kann der Ballast in seine richtige Stellung zu der Drehbühne gebracht und abgesetzt werden.In the crane according to the invention, in addition to the pivoting of the outer support part of the jib, the assembly winch and the associated rope are assigned a second function as ballasting device. The end of the rope is anchored to the tower or a support part of the boom, so that the ballasting hook can be brought over the ballast to be picked up by rocking the not yet telescoped tower. The bottom block can be raised and lowered and the ballast can be picked up by actuating the assembly winch. By rocking and swiveling the tower, the ballast can be brought into its correct position on the rotating platform and set down.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben worden.Advantageous embodiments of the invention have been described in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen näher erläutert.An embodiment of the invention is explained below with reference to the drawings.

In dieser zeigt:

  • Fig. 1. eine Seitenansicht des Krans mit teleskopierbarem Turm im montierten Zustand in schematischer Darstellung,
  • Fig. 1 A bis 1 C unterschiedliche Einscherungen des Seils der Montagewinde,
  • Fig. 2 eine Seitenansicht des Krans nach Fig. 1 mit unteleskopiertem Turm während seiner Verwendung als Ballastiervorrichtung und
  • Fig. 3 eine Seitenansicht des Krans nach Fig. 1 in unterschiedlichen Montagestellungen.
In this shows:
  • 1 is a side view of the crane with telescopic tower in the assembled state in a schematic representation,
  • 1A to 1C different reeving of the rope of the assembly winch,
  • Fig. 2 is a side view of the crane of FIG. 1 with the telescopic tower during its use as a ballasting device and
  • Fig. 3 is a side view of the crane according to Fig. 1 in different assembly positions.

Der in Fig. 1 dargestellte Kran besteht aus einem Portal 1, das über eine übliche Drehverbindung mit der Drehbühne 2 verbunden ist. Die Drehbühne 2 ist mit zwei zueinander parallelen, jeweils in Dreiecksform angeordneten und diese an ihrem vorderen Ende überkragenden Trägern 3 versehen, zwischen denen in der dargestellten Weise das Unterteil 4 des teleskopierbaren Turms schwenkbar gelagert ist. In seiner dargestellten senkrechten Stellung wird das Unterteil 4 in bekannter Seite verriegelt. Zum Aufrichten des Unterteils 4 des Turms ist ein Flaschenzug 5 mit einer Winde 6 vorgesehen.The crane shown in Fig. 1 consists of a portal 1, which is connected to the rotating platform 2 via a conventional rotary connection. The rotating stage 2 is provided with two mutually parallel, each arranged in a triangular shape and projecting at its front end of beams 3, between which the lower part 4 of the telescopic tower is pivotally mounted in the manner shown. In its vertical position shown, the lower part 4 is locked in a known side. A pulley 5 with a winch 6 is provided for erecting the lower part 4 of the tower.

Aus dem Unterteil 4 ist über hydraulische Einrichtungen oder einen Teleskopierflaschenzug das obere Teil 7 des Turms ausfahrbar.The upper part 7 of the tower can be extended from the lower part 4 via hydraulic devices or a telescopic pulley block.

Mit dem oberen Ende des ausfahrbaren Teils 7 ist im Gelenk 8 das innere Trägerteil 9 des Auslegers verbunden. Mit dem inneren Trägerteil 9 ist durch das Gelenk 10 das äussere Trägerteil 11 im Bereich der Untergurte beider Trägerteile verbunden.The inner support part 9 of the boom is connected to the upper end of the extendable part 7 in the joint 8. The outer support part 11 is connected to the inner support part 9 by the joint 10 in the region of the lower chords of both support parts.

Die inneren und äusseren Trägerteile 9, 11 sind in ihrer fluchtenden waagerechten Stellung durch Abspannseile gehalten. Das hintere Abspannseil 12 verläuft von seiner Verankerung 13 an der Drehbühne 2 über die Rolle 14 zu dem Festpunkt 15 an dem oberen Ende der A-förmigen Auslegerstütze 16, die mit der Gelenkachse 8 an dem oberen Ende des ausfahrbaren Teils 7 angelenkt ist. Von dem Festpunkt 15 verläuft ein erstes Abspannseil 17 zu dem Festpunkt 18 im Bereich des äusseren Endes des inneren Trägerteils 9. Ein zweites Abspannseil 19 verläuft von dem Festpunkt 15 der Auslegerstütze 16 zu einem Festpunkt 20 am oberen Ende der Mittelstütze 21, die um die Gelenkachse 1 Ozwischen den inneren und äusseren Trägerteilen gelenkig gelagert ist. Von dem Festpunkt 20 verläuft ein drittes Abspannseil 22zu dem im Bereich des äusseren Endes des äusseren Trägerteils 11 befindlichen Festpunkt 23.The inner and outer support parts 9, 11 are held in their aligned horizontal position by guy ropes. The rear guy rope 12 runs from its anchor 13 on the rotating platform 2 via the roller 14 to the fixed point 15 at the upper end of the A-shaped boom support 16, which is articulated with the hinge axis 8 at the upper end of the extendable part 7. A first guy cable 17 runs from the fixed point 15 to the fixed point 18 in the region of the outer end of the inner support part 9. A second guy cable 19 runs from the fixed point 15 of the boom support 16 to a fixed point 20 at the upper end of the center support 21, which is about the hinge axis 1 O is articulated between the inner and outer support parts. A third guy rope 22 runs from the fixed point 20 to the fixed point 23 located in the region of the outer end of the outer carrier part 11.

Die Rolle 14 ist an dem hinteren Ende des Gegenauslegers 24 gelagert, der starr in der dargestellten Weise mit dem ausfahrbaren Teil 7 des Turms verbunden ist. Im oberen Bereich dieses ausfahrbaren Teils 7 ist auf einer Konsole die Montagewinde 25 angeordnet. Von der durch einen Elektromotor angetriebenen Montagewinde 25 läuft ein Seil 26 zu den im Abstand parallel und gleichachsig im vorderen Bereich des Gegenauslegers 24 gelagerten Umlenkrollen 27, 27' und diesen über die Seilrolle der Unterflasche 28, die den Kranhaken 29 zur Aufnahme des Ballasts trägt. Von der Rolle 27' läuft das Seil 26 über die Umlenkrollen 30, 31 an dem inneren Trägerteil zu einer Umlenkrolle 32, die an dem oberen Ende der Mittelstütze gelagert ist. Über die Rolle 32 ist das Seil 26 zu der Rolle 33 an dem äusseren Trägerteil geführt und von dieser zurück zu dem Festpunkt 20 am äusseren Ende der Mittelstütze. Diese Einscherung des Seils entspricht der gemäss Fig. 1B. Andere mögliche Einscherungen des Seils 26 sind in den Fig. 1 A und 1 C dargestellt.The roller 14 is mounted on the rear end of the counter jib 24, which is rigidly connected in the manner shown to the extendable part 7 of the tower. In the upper area of this extendable part 7, the mounting screw 25 is arranged on a bracket. A cable 26 runs from the assembly winch 25, which is driven by an electric motor, to the deflection pulleys 27, 27 ', which are spaced parallel and coaxially in the front area of the counter-jib 24, and via the cable pulley of the lower block 28, which carries the crane hook 29 for receiving the ballast. The cable 26 runs from the roller 27 'via the deflection rollers 30, 31 on the inner support part to a deflection roller 32 which is mounted at the upper end of the central support. The cable 26 is guided to the roller 33 on the outer support part via the roller 32 and from this back to the fixed point 20 at the outer end of the central support. This reeving of the rope corresponds to that according to FIG. 1B. Other possible reeving of the rope 26 are shown in FIGS. 1A and 1C.

Die Art der Ballastierung der Drehbühne 2 mit den einzeln aufgenommenen Ballastgewichten 35 ist aus Fig. 2 ersichtlich. Zur Aufnahme der Gewichte 35 wird der noch nicht teleskopierte Turm 4, 7 über den Flaschenzug 5 gewippt und in der erforderlichen Weise geschwenkt, so dass der Kranhaken 29 nach Absenken der Unterflasche 28 in die Öse des Ballastgewichts 35 eingehängt werden kann. Die Ballastgewichte 35 lassen sich sodann in der dargestellten Weise auf dem hinteren Ende der Drehbühne 2 zur Ballastierung aufeinander absetzen.The type of ballasting of the rotating platform 2 with the individually recorded ballast weights 35 can be seen in FIG. 2. To accommodate the weights 35, the not yet telescoped tower 4, 7 is rocked over the block and tackle 5 and pivoted in the required manner so that the crane hook 29 can be hung into the eyelet of the ballast weight 35 after lowering the bottom block 28. The ballast weights 35 can then be deposited in the manner shown on the rear end of the rotating platform 2 for ballasting.

Nach der Ballastierung wird das vordere Ende des Seils der Möntagewinde an seinem Festpunkt an dem äusseren Trägerteil des Auslegers oder der Mittelstütze befestigt und in der aus Fig. 1 ersichtlichen Weise eingeschert. Nach Ablassen des äusseren Trägerteils 11 wird die gelenkige Verbindung 10 mit dem inneren Trägerteil 9 hergestellt, so dass das äussere Trägerteil 11 in der aus Fig. 3 in voll ausgezogenen Linien dargestellten Weise in waagerechter Lage mit dem zu dem aufgerichteten und noch nicht teleskopierten Turm parallelen inneren Trägerteil 9 verbunden ist.After ballasting, the front end of the rope of the Möntagewinde is fixed at its fixed point on the outer support part of the boom or the central support and reeved in the manner shown in FIG. 1. After lowering the outer support part 11, the articulated connection 10 is made with the inner support part 9, so that the outer support part 11 in the manner shown in full lines from FIG. 3 in a horizontal position with the parallel to the erected and not yet telescoped tower inner support member 9 is connected.

Durch Teleskopieren des Turms wird nach Straffung des hinteren Abspannseils 12 der innere Trägerteil 9 in der in gestrichelten Linien dargestellten Weise im Gegenuhrzeigersinn verschwenkt. Das äussere Trägerteil 11 lässt sich durch entsprechende Betätigung der Montagewinde 25 in gewünschter Weise verschwenken.By telescoping the tower, after tightening the rear guy rope 12, the inner support part 9 is pivoted counterclockwise in the manner shown in dashed lines. The outer support part 11 can be pivoted in the desired manner by corresponding actuation of the mounting screw 25.

Claims (3)

1. A crane comprising a telescopic tower (4, 7), which is secured to a revolving superstructure or to the rotating deck (2) of a portal (12) and has an extensible part (7), which at its upper end is articulatedly connected to the inner girder section (9) of the jib, wherein an outer girder section (11) of the jib is hinged to the inner girder section (9) at the outer end thereof,
comprising a counterbalancing jib (24), which is secured to the top end of the extensible part and has a free end, wherein a rear guy rope (12), which is fixed (at 13) to the revolving superstructure or to the rotating deck and from said fixing point extends around said free end to a fixed point (15) at the outer end of a jib support (16), which is hinged to the top end of the extensible part,
comprising two additional forward guy ropes (17, 19), which are secured to the fixed point (15) of the jib support, wherein the end of the first (17) of said additional guy ropes is secured to the outer portion (18) of the inner girder section, the other end of the second guy rope is secured to the end (24) of a central support (21 ), a third guy rope (22) is secured to the end (24), and the other end of the third guy rope (22) is secured to the outer portion (23) of the outer girder section of the beam,
and comprising a rope (26), which is secured to the outer girder section and is trained around a pulley (32) at the end of the central support and around a deflecting pulley (31) of the inner girder section and around additional deflecting pulleys (27, 27', 30) and then extends to an assembling winch (25), by which the outer girder section is pivotally movable relative to the inner girder section of the jib, characterized in that the rope (26) is trained around two coaxial deflecting pulleys (27, 27'), which are rotatably mounted on the rear end portion of the counterbalancing jib (24), which is rigidly connected to the extensible part (7), and the rope (26) is trained between said deflecting rollers (27, 27') around a pulley of a block (28), which carries a ballast hook and is movable as far as to a stop, and the tower (4, 7) is pivoted and provided with a luffing drive (5, 6).
2. A crane according to claim 1, characterized in that the assembling winch (25) is disposed adjacent to the top end of the extensible part (7).
3. A crane according to claim 1 or 2, characterized in that the rope (26), which at its end is secured to the outer girder section (11) or to the central support (21), is reeved several times between rope pulleys (32, 33) of the outer girder section (11) and of the central support (21).
EP84106894A 1983-06-21 1984-06-15 Crane with a telescopic tower Expired EP0132572B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106894T ATE25230T1 (en) 1983-06-21 1984-06-15 CRANE WITH TELESCOPIC TOWER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3322268A DE3322268A1 (en) 1983-06-21 1983-06-21 CRANE WITH TELESCOPIC TOWER
DE3322268 1983-06-21

Publications (2)

Publication Number Publication Date
EP0132572A1 EP0132572A1 (en) 1985-02-13
EP0132572B1 true EP0132572B1 (en) 1987-01-28

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Family Applications (1)

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EP84106894A Expired EP0132572B1 (en) 1983-06-21 1984-06-15 Crane with a telescopic tower

Country Status (3)

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EP (1) EP0132572B1 (en)
AT (1) ATE25230T1 (en)
DE (1) DE3322268A1 (en)

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US8985353B2 (en) 2006-10-27 2015-03-24 Manitowoc Crane Companies, Llc Mobile lift crane with variable position counterweight
US9278834B2 (en) 2009-08-06 2016-03-08 Manitowoc Crane Group, LLC Lift crane with moveable counterweight

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DE4315960A1 (en) * 1993-05-12 1994-11-17 Liebherr Werk Biberach Gmbh Crane with telescopic tower
FR2761970B1 (en) * 1997-04-11 1999-05-28 Potain Sa MAT LIFT DEVICE FOR TELESCOPIC TOWER CRANE
EP0941958A1 (en) * 1998-03-11 1999-09-15 Gru Dalbe S.r.l. A system for reducing the overall aerial dimensions of the jib in a foldable jib crane
ATE307777T1 (en) * 1999-09-17 2005-11-15 Liebherr Werk Biberach Gmbh TOWER CRANE
DE202004002424U1 (en) * 2004-02-17 2005-07-07 Liebherr-Werk Ehingen Gmbh Derrick
US7546928B2 (en) 2006-10-27 2009-06-16 Manitowoc Crane Companies, Inc. Mobile lift crane with variable position counterweight
CN102320526B (en) * 2011-09-14 2013-02-13 哈尔滨东建机械制造有限公司 Self-loading and unloading foldable tower crane
DE102013006307B4 (en) * 2013-04-12 2016-12-29 Bauer Maschinen Gmbh CONSTRUCTION MACHINE AND METHOD FOR OPERATING THE CONSTRUCTION MACHINE
WO2015113032A1 (en) 2014-01-27 2015-07-30 Manitowoc Crane Companies, Llc Height adjustment mechanism for an auxiliary member on a crane
CN106458543B (en) 2014-01-27 2019-06-14 马尼托瓦克起重机有限责任公司 Rise heavy-duty machine is hung with improved movable counterweight
CN116969353A (en) * 2023-09-25 2023-10-31 河南省大方重型机器有限公司 High-voltage transmission line insulator lifting device

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Publication number Priority date Publication date Assignee Title
US8985353B2 (en) 2006-10-27 2015-03-24 Manitowoc Crane Companies, Llc Mobile lift crane with variable position counterweight
US9278834B2 (en) 2009-08-06 2016-03-08 Manitowoc Crane Group, LLC Lift crane with moveable counterweight

Also Published As

Publication number Publication date
DE3322268A1 (en) 1985-01-17
EP0132572A1 (en) 1985-02-13
DE3322268C2 (en) 1987-02-19
ATE25230T1 (en) 1987-02-15

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