EP2041018B1 - Use of a bush in the correction of tower elements of a tower crane - Google Patents

Use of a bush in the correction of tower elements of a tower crane Download PDF

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Publication number
EP2041018B1
EP2041018B1 EP07786089A EP07786089A EP2041018B1 EP 2041018 B1 EP2041018 B1 EP 2041018B1 EP 07786089 A EP07786089 A EP 07786089A EP 07786089 A EP07786089 A EP 07786089A EP 2041018 B1 EP2041018 B1 EP 2041018B1
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EP
European Patent Office
Prior art keywords
tower
elements
bushing
openings
tower crane
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EP07786089A
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German (de)
French (fr)
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EP2041018A1 (en
Inventor
Reinald Geissler
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Wolffkran AG
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Wolffkran AG
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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
    • B66C23/283—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 assembled elements
    • B66C23/286—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 assembled elements with locking devices

Definitions

  • the invention relates to the use of a socket in the connection of tower elements of a tower crane.
  • Tower cranes comprise a crane base from which a tower extends upwards. At an upper portion of the tower usually a boom and possibly a counter-jib is attached. Tower cranes are for example from the patent DE 35 10 116 C2 known.
  • the tower of a tower crane usually comprises several tower elements (also referred to as "tower shots").
  • the tower elements can be 4.5m long and 2.5t heavy, for example.
  • the vertically extending corner posts of the tower elements are positively placed on each other and releasably connected by bolts. This bolt connection is made possible by the fact that the ends of the corner posts of the tower elements each have pins or sleeves for pin receiving, which can be inserted into one another during assembly.
  • the pins and the sleeves for receiving the pins can be provided with mutually aligned, continuous and substantially cylindrical, diameter-equal openings, in each of which a substantially cylindrical bolt is fitted.
  • a tower element may have at its one end only sleeves and at the other end only pins.
  • the openings (bores) in the spigots and pods of the tower elements may become larger (beat) over time due to the strong forces acting on them and the constantly changing stress, until finally the permissible tolerance limit is reached.
  • the invention has for its object to connect tower elements with different sized holes and thereby avoid the disadvantages of the known solutions.
  • Claim 3 relates to a tower crane, in which a socket is used according to claim 1. Further embodiments are the subject matter of the subclaims or described below.
  • the bushing preferably has as inner diameter (within the tolerance limits) the diameter of the openings in the sleeves of one tower element (with the smaller holes) and as outer diameter the diameter of the openings in the pins of the other tower element (with the larger openings).
  • the bushing is preferably made of a high quality material, most advantageously of the same material as the bolt used, preferably high quality steel such as alloy 42 CrMo 4.
  • the sleeve preferably has at one end to an outwardly projecting collar against which Moving too far into the hole insures. The bush is pushed into the pin with the larger opening.
  • the socket can be removed again after years, it can be knocked out by means of a simple tool.
  • the pegs of the tower element are always up while the pods are down below and are pushed over the pegs of the lower tower element.
  • the invention also provides a method of repairing a worn opening in the journal of a tower element of a tower crane, in which the opening in the journal is drilled so as to obtain a cylindrical shape of increased diameter, and then a bush in the Opening is pushed, whose inner diameter corresponds to the original inner diameter of the opening.
  • the solution according to the invention has the advantage that welding is completely eliminated.
  • FIG. 1 shows the sleeve 1 of a corner post of a tower element, which is pushed over the pin 2 of another tower element.
  • the cylindrical opening 3 in the pin 2 has a larger diameter than the openings 4a, 4b in the sleeve 1.
  • a cylindrical sleeve 5 is inserted, whose outer diameter corresponds to the diameter of the opening 3 of the pin 2 and whose Inner diameter of the openings 4a, 4b of the sleeve 1 corresponds.
  • the bush 5 has on the side of the opening 4 a circumferential collar 6.

Abstract

The invention relates to the use of a bush in the connection of tower elements of a tower crane. Whereas, hitherto, holes punched in the tower elements have had to be repaired in a complicated manner by being welded shut and re-drilled, the use of the bush according to the invention permits rapid repair in situ. By this means, the tower crane is ready for use again within a very short period of time, since the individual elements do not have to be brought first to a special workshop in which the repair work is undertaken.

Description

Die Erfindung betrifft die Verwendung einer Buchse bei der Verbindung von Turmelementen eines Turmkrans.The invention relates to the use of a socket in the connection of tower elements of a tower crane.

Turmkrane umfassen eine Kranbasis, von der ausgehend sich ein Turm nach oben erstreckt. An einem oberen Abschnitt des Turms ist üblicherweise ein Ausleger und möglicherweise ein Gegenausleger angebracht. Turmkrane sind zum Beispiel aus der Patentschrift DE 35 10 116 C2 bekannt.Tower cranes comprise a crane base from which a tower extends upwards. At an upper portion of the tower usually a boom and possibly a counter-jib is attached. Tower cranes are for example from the patent DE 35 10 116 C2 known.

Der Turm eines Turmkranes umfasst üblicherweise mehrere Turmelemente (auch als "Turmschüsse" bezeichnet). Die Turmelemente können beispielsweise 4,5m lang und 2,5t schwer sein. Die vertikal verlaufenden Eckstiele der Turmelemente werden formschlüssig aufeinander gesetzt und lösbar mittels Bolzen verbunden. Diese Bolzenverbindung wird dadurch ermöglicht, dass die Enden der Eckstiele der Turmelemente jeweils Zapfen bzw. Hülsen zur Zapfenaufnahme aufweisen, die bei der Montage ineinander gesteckt werden können. Die Zapfen und die Hülsen zur Aufnahme der Zapfen können dabei mit zueinander ausgerichteten, durchgehenden und im wesentlichen zylindrischen, durchmessergleichen Öffnungen versehen sein, in die jeweils ein im wesentlichen zylindrischer Bolzen eingepasst wird. Ein Turmelement kann an seinem einen Ende nur Hülsen und an dem anderen Ende nur Zapfen aufweisen.The tower of a tower crane usually comprises several tower elements (also referred to as "tower shots"). The tower elements can be 4.5m long and 2.5t heavy, for example. The vertically extending corner posts of the tower elements are positively placed on each other and releasably connected by bolts. This bolt connection is made possible by the fact that the ends of the corner posts of the tower elements each have pins or sleeves for pin receiving, which can be inserted into one another during assembly. The pins and the sleeves for receiving the pins can be provided with mutually aligned, continuous and substantially cylindrical, diameter-equal openings, in each of which a substantially cylindrical bolt is fitted. A tower element may have at its one end only sleeves and at the other end only pins.

Die Öffnungen (Bohrungen) in den Zapfen und Hülsen der Turmelemente werden durch die starken Kräfte, die auf sie wirken, und die ständig wechselnde Beanspruchung im Laufe der Zeit möglicherweise größer (schlagen aus), bis schließlich die zulässige Toleranzgrenze erreicht wird.The openings (bores) in the spigots and pods of the tower elements may become larger (beat) over time due to the strong forces acting on them and the constantly changing stress, until finally the permissible tolerance limit is reached.

DE 23 51 177 A1 zeigt eine Turmschussverbindung, bei der die Bolzen zweiteilig ausgebildet sind und sich aus einem Kern mit konischer Mantelfläche und einer äußeren, längsgeschlitzten Hülse mit konischer Bohrung zusammensetzen. Die äußere Hülse wird von dem Kern radial nach außen gedrückt und soll so auch bei ausgeschlagenen Bohrungen festen Sitz gewährleisten. Diese Lösung ist jedoch nur für leichte und gleichmäßige Vergrößerungen der Bohrungen geeignet. DE 23 51 177 A1 shows a tower connection in which the bolts are formed in two parts and are composed of a core with a conical surface and an outer, longitudinally slotted sleeve with a conical bore. The outer sleeve is pressed by the core radially outward and should thus ensure tight fit even with knocked holes. However, this solution is only suitable for slight and uniform enlargement of the holes.

Im Falle stärkerer Vergrößerungen der Öffnungen (Bohrungen) ist es bekannt, die Öffnungen in den Eckstielen zuzuschweißen und neu zu bohren. Dies hat jedoch den Nachteil, dass es sehr zeitaufwändig ist, insbesondere, da es sich bei Bohren und Schweißen um völlig verschiedene Tätigkeiten handelt, die von verschiedenen Fachleuten ausgeführt werden. Bekannt ist weiterhin, die ausgeschlagenen Öffnungen auszubohren, also die Öffnungen zu vergrößern, mit der Folge, dass es Turmelemente mit verschieden großen Öffnungen (Bohrungen) gibt. Die Öffnungen von Turmelementen können jedoch auch von vorneherein unterschiedlich groß sein, weil sie beispielsweise zu unterschiedlichen Generationen von Turmelementen gehören. Zur Verbindung solcher Turmelemente mit verschieden großen Bohrungen ist es bekannt, ein Adapter-Turmelement vorzuhalten, dessen eines Ende mit den Turmelementen mit den kleineren Bohrungen und des anderes Ende mit den Turmelementen mit den größeren Bohrungen zusammenpasst. Diese Lösung hat jedoch insbesondere den Nachteil, dass sie erheblichen logistischen Aufwand erfordert, damit das Adapter-Turmelement dorthin gelang, wo es gebraucht wird.In the case of stronger enlargements of the openings (holes), it is known to weld the openings in the corner stems and re-drill. However, this has the disadvantage that it is very time-consuming, in particular, since drilling and welding are completely different activities carried out by different experts. It is also known to drill out the knocked-out openings, ie to enlarge the openings, with the result that there are tower elements with openings of different sizes (bores). However, the openings of tower elements can also be of different size from the outset because they belong, for example, to different generations of tower elements. For connecting such tower elements with different sized holes, it is known vorzuhalten an adapter tower element, which matches one end with the tower elements with the smaller holes and the other end with the tower elements with the larger holes. However, this solution has the particular disadvantage that it requires considerable logistical effort, so that the adapter tower element succeeded where it is needed.

Der Erfindung liegt die Aufgabe zugrunde, Turmelemente mit verschieden großen Bohrungen zu verbinden und dabei die Nachteile der bekannten Lösungen zu vermeiden.The invention has for its object to connect tower elements with different sized holes and thereby avoid the disadvantages of the known solutions.

Diese Aufgabe wird durch die Verwendung einer Buchse mit den im Patentanspruch 1 bezeichneten Merkmalen gelöst. Patentanspruch 3 betrifft einen Turmkran, bei dem eine Buchse nach Patentanspruch 1 verwendet wird. Weitere Ausführungsformen sind Gegenstand der Unteransprüche oder nachfolgend beschrieben.This object is achieved by the use of a socket having the features designated in claim 1. Claim 3 relates to a tower crane, in which a socket is used according to claim 1. Further embodiments are the subject matter of the subclaims or described below.

Die Buchse hat vorzugsweise als Innendurchmesser (innerhalb der Toleranzgrenzen) den Durchmesser der Öffnungen in den Hülsen des einen Turmelements (mit den kleineren Bohrungen) und als Außendurchmesser den Durchmesser der Öffnungen in den Zapfen des anderen Turmelements (mit den größeren Öffnungen). Die Buchse besteht vorzugsweise aus einem hochwertigen Material, ganz besonders vorteilhafterweise aus dem gleichen Material wie die verwendeten Bolzen, vorzugsweise hochwertigem Stahl wie beispielsweise legiertem 42 CrMo 4. Die Buchse weist bevorzugt an einem Ende einen nach außen überstehenden Bund auf, der sie gegen ein Verschieben zu weit in die Bohrung hineinsichert. Die Buchse wird in den Zapfen mit der größeren Öffnung hineingeschoben.The bushing preferably has as inner diameter (within the tolerance limits) the diameter of the openings in the sleeves of one tower element (with the smaller holes) and as outer diameter the diameter of the openings in the pins of the other tower element (with the larger openings). The bushing is preferably made of a high quality material, most advantageously of the same material as the bolt used, preferably high quality steel such as alloy 42 CrMo 4. The sleeve preferably has at one end to an outwardly projecting collar against which Moving too far into the hole insures. The bush is pushed into the pin with the larger opening.

Die Buchse lässt sich auch nach Jahren wieder ausbauen, sie kann mittels eines einfachen Werkzeugs ausgeschlagen werden. Die Zapfen des Turmelements sind immer oben, während die Hülsen unten angeordnet sind und über die Zapfen des unteren Turmelementes geschoben werden.The socket can be removed again after years, it can be knocked out by means of a simple tool. The pegs of the tower element are always up while the pods are down below and are pushed over the pegs of the lower tower element.

Mit der Erfindung wird auch ein Verfahren zur Reparatur einer ausgeschlagenen Öffnung in dem Zapfen eines Turmelements eines Turmkrans zur Verfügung gestellt, bei dem die Öffnung in dem Zapfen aufgebohrt wird, so dass sie eine zylindrische Form mit vergrößertem Durchmesser erhält, und anschließend eine Buchse in die Öffnung geschoben wird, deren Innendurchmesser dem ursprünglichen Innendurchmesser der Öffnung entspricht. Die erfindungsgemäße Lösung hat den Vorteil, dass das Schweißen völlig entfällt.The invention also provides a method of repairing a worn opening in the journal of a tower element of a tower crane, in which the opening in the journal is drilled so as to obtain a cylindrical shape of increased diameter, and then a bush in the Opening is pushed, whose inner diameter corresponds to the original inner diameter of the opening. The solution according to the invention has the advantage that welding is completely eliminated.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben:

  • Figur 1 zeigt den Querschnitt durch einen Abschnitt von Zapfen und Hülse zweier miteinander verbundener Turmelemente.
An embodiment of the invention is illustrated in the drawing and will be described in more detail below:
  • FIG. 1 shows the cross section through a portion of pin and sleeve of two interconnected tower elements.

In Figur 1 ist die Hülse 1 eines Eckstiels eines Turmelements dargestellt, die über den Zapfen 2 eines anderen Turmelements geschoben ist. Die zylindrische Öffnung 3 in dem Zapfen 2 hat einen größeren Durchmesser als die Öffnungen 4a, 4b in der Hülse 1. In die Öffnung 3 des Zapfens 2 ist eine zylindrische Buchse 5 eingeschoben, deren Außendurchmesser dem Durchmesser der Öffnung 3 des Zapfens 2 entspricht und deren Innendurchmesser den Öffnungen 4a, 4b der Hülse 1 entspricht. Die Buchse 5 weist auf der Seite der Öffnung 4a einen umlaufenden Bund 6 auf.In FIG. 1 shows the sleeve 1 of a corner post of a tower element, which is pushed over the pin 2 of another tower element. The cylindrical opening 3 in the pin 2 has a larger diameter than the openings 4a, 4b in the sleeve 1. In the opening 3 of the pin 2, a cylindrical sleeve 5 is inserted, whose outer diameter corresponds to the diameter of the opening 3 of the pin 2 and whose Inner diameter of the openings 4a, 4b of the sleeve 1 corresponds. The bush 5 has on the side of the opening 4 a circumferential collar 6.

Claims (4)

  1. Use of a cylindrical bushing for reducing the openings in the journals of a tower clement of a tower crane, characterised in that the internal diameter of the bushing corresponds to the diameter of the openings in the sleeves of another tower element of the tower crane.
  2. Use of a cylindrical bushing according to Claim 1, characterised in that the bushing consists of the same material as the journal.
  3. A tower crane comprising at least two tower elements which are connected together such that vertically-cxtending corner posts of the tower elements each have journals or sleeves for receiving journals which are inserted into one another and are connected detachably by means of connecting bolts inserted into the journals or the sleeve through cylindrical openings, with a bushing being inserted into at least one journal, which bushing reduces the diameter of the opening in the journal, characterised in that the internal diameter of the bushing corresponds to the diameter of the openings in the sleeves of another tower element of the tower crane.
  4. A tower crane according to Claim 3, characterised in that the bushing consists of the same material as the journal.
EP07786089A 2006-07-18 2007-07-16 Use of a bush in the correction of tower elements of a tower crane Active EP2041018B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006033594A DE102006033594B3 (en) 2006-07-18 2006-07-18 Use of a socket in the connection of tower elements of a tower crane
PCT/EP2007/006287 WO2008009399A1 (en) 2006-07-18 2007-07-16 Use of a bush in the connection of tower elements of a tower crane

Publications (2)

Publication Number Publication Date
EP2041018A1 EP2041018A1 (en) 2009-04-01
EP2041018B1 true EP2041018B1 (en) 2010-08-04

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EP07786089A Active EP2041018B1 (en) 2006-07-18 2007-07-16 Use of a bush in the correction of tower elements of a tower crane

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EP (1) EP2041018B1 (en)
AT (1) ATE476392T1 (en)
DE (2) DE102006033594B3 (en)
WO (1) WO2008009399A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114408770A (en) * 2022-01-13 2022-04-29 中联重科建筑起重机械有限责任公司 Standard knot device and tower crane

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1169226A (en) * 1966-02-01 1969-10-29 Richier Sa Improvements in or relating to Towers or Beams
DE2351177A1 (en) * 1973-10-11 1975-04-24 Liebherr Hans Dr Ing E H TOWER JOINT
SU887440A1 (en) * 1979-11-02 1981-12-07 Механический Завод Управления Капитального Ремонта Ленгорисполкома Device for matching three-dimensional tower crane sections
FR2680813B1 (en) * 1991-08-30 1995-10-20 Potain Sa REMOVABLE ASSEMBLY DEVICE FOR METAL FRAME ELEMENTS.

Also Published As

Publication number Publication date
WO2008009399A1 (en) 2008-01-24
EP2041018A1 (en) 2009-04-01
ATE476392T1 (en) 2010-08-15
DE102006033594B3 (en) 2008-01-24
DE502007004661D1 (en) 2010-09-16

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