EP1935834B1 - Telescopic section - Google Patents

Telescopic section Download PDF

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Publication number
EP1935834B1
EP1935834B1 EP20070022978 EP07022978A EP1935834B1 EP 1935834 B1 EP1935834 B1 EP 1935834B1 EP 20070022978 EP20070022978 EP 20070022978 EP 07022978 A EP07022978 A EP 07022978A EP 1935834 B1 EP1935834 B1 EP 1935834B1
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EP
European Patent Office
Prior art keywords
cut
section
reinforcing
telescopic
metal sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP20070022978
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German (de)
French (fr)
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EP1935834A1 (en
Inventor
Engelbert Häbe
Joachim Henkel
Walter Gundel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Ehingen GmbH
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Liebherr Werk Ehingen GmbH
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Publication date
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Publication of EP1935834A1 publication Critical patent/EP1935834A1/en
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Publication of EP1935834B1 publication Critical patent/EP1935834B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs

Definitions

  • the invention relates to a telescopic weft according to the preamble of claim 1.
  • Telescopic shots are used, for example, in mobile cranes. They usually consist of profile tubes. After pushing out, they are bolted together. These Verbolzstellen transfer large forces. Therefore, they are usually performed reinforced. Such a reinforced version is carried out by a further sheet metal layer which is applied in this area. This additional sheet metal layer is commonly referred to as a bolt plate or locking plate.
  • the bolt plates or locking plates are welded onto the profile tube at the bolting point.
  • the bolted joints are reinforced by the welded-on sheet metal.
  • the basic material of the telescope shot but burdened by the welding process. The welding process itself is expensive and must be carried out by trained personnel. This in turn leads to an increase in the cost of production.
  • Object of the present invention is to provide a generic telescope shot with a simple to apply and thus cost-effective reinforcement in the field of Verbolzstelle.
  • a telescopic weft which consists of a profile tube with at least one recess having a Verbolzstelle, thereby reinforced by sheets that the Verbolzstelle reinforcing plates are glued on both sides of the profile tube.
  • the Verbolzstelle reinforcing sheets are circular and their serving to receive the pin recess is arranged centrally.
  • the reinforcing sheets may also have any other shape, for example a rectangular shape, a square shape.
  • the shape of the recess in the telescopic tube or Anlenkschuß be arbitrary. It is also possible that the Verbolzstelle is located in the Verbolzteller off-center.
  • the plates which reinforce the bolting point may advantageously have a thickness which increases towards its recess.
  • the recess in the profile tube is dimensioned so that it receives a projection of the Verbolzstelle reinforcing plates.
  • the advantage lies in the fact that already in the connection point between the bolt plate and telescopic profile a positive connection is made.
  • the recess of the telescopic profile defined here exactly the place in which the bolt plate must be positioned, so that the arrangement of the bolt plate is additionally facilitated during assembly.
  • Verbolzstelle reinforcing sheets may be glued together in the region of their projections within the recess of the profile tube, while they are glued outside the recess on the profile tube.
  • the Verbolzstelle reinforcing plates can complete with their recess congruent with the recess of the profile tube. This allows the Verbolzstelle and the Verbolzteller be made particularly simple and inexpensive.
  • the recesses of the profile tube may be slightly larger than the recesses of the Verbolzstelle reinforcing plates, so that they protrude beyond the edge of the recess of the profile tube.
  • the Verbolzstelle can be arranged in the upper flange, in one or both of the side walls and / or the lower flange of the profile tube.
  • FIG. 1 a section through a detail of a telescopic section 10 is shown.
  • an upper flange 12 of the telescopic section 10 forming profile tube is shown here, which has a recess 22 through which a not shown here pin for making a bolt connection can be inserted.
  • the upper flange 12 of the telescopic section 10 has reinforcements in the form of applied metal sheets 16 and 18.
  • a plate 16 is placed from above on the upper belt, while the other sheet 18 is placed from below on the top flange.
  • the sheets 16 and 18 are glued to the top chord 12, respectively. This forms between the top flange 12 on the one hand and the sheets 16 and 18 on the other hand adhesive surfaces 20. These adhesive surfaces 20 seal the top flange in the gain region and thereby prevent corrosion at this point.
  • the recess 22 is formed in the profile tube larger than the diameter of the plug pin not shown here.
  • a recess corresponding to the diameter of the plug-in pin for connection has the otherwise circularly formed plates 16 and 18 which serve to reinforce the bolting point 14.
  • these sheets 16 and 18 each have a projection 26 which is dimensioned so that the plates 16 and 18 in the recess 22 in the profile tube 12 abut by the correspondingly formed paragraph (see , FIG. 1 ).
  • the projections 26 are further dimensioned so that the sheets 16 and 18 in the region of the recess 22 of the profile tube 12 are connected to each other in area by an adhesive surface 20.
  • the recess 22 of the upper belt 12 is machined and defined on the projection 26 of the sheets 16 and 18 at.
  • the recess in the telescopic profile can be used as a positioning aid for the sheets 16 and 18 during bonding.
  • the adhesive surface 20 is still a positive connection between the sheets 16 and 18 and the upper flange created.
  • the sheets 16 and 18 have an increasing thickness towards their recess 24. This thickness can, as in FIG. 1 is shown, gradually increase.
  • FIG. 2 corresponds essentially to that according to FIG. 1 , Here, however, no projection 26 is provided in the sheets 16 and 18.
  • the recess 22 in the top flange 12 and the recesses 24 in the sheets 16 and 18 have substantially the same diameter.
  • the upper flange 12 itself is part of the Verbolzstelle.
  • Each adhesive surface 20 has a certain elasticity, so that additionally dimensional fluctuations that can occur are compensated.
  • the plates 16 and 18 may protrude further beyond the base material of the upper flange 12 in the Verbolzstelle, as in the FIG. 2 not shown.
  • the Verbolzstellen 14 produce in a particularly simple and cost-effective manner.

Description

Die Erfindung betrifft einen Teleskopschuß nach dem Oberbegriff des Anspruchs 1.The invention relates to a telescopic weft according to the preamble of claim 1.

Teleskopschüsse werden beispielsweise bei Mobilkranen eingesetzt. Sie bestehen üblicherweise aus Profilrohren. Nach dem Ausschieben werden sie miteinander verbolzt. Diese Verbolzstellen übertragen große Kräfte. Daher werden sie üblicherweise verstärkt ausgeführt. Eine derartige verstärkte Ausführung erfolgt durch eine weitere Blechlage, die in diesem Bereich aufgebracht wird. Diese zusätzliche Blechlage wird üblicherweise als Verbolzteller oder auch Verriegelungsblech bezeichnet.Telescopic shots are used, for example, in mobile cranes. They usually consist of profile tubes. After pushing out, they are bolted together. These Verbolzstellen transfer large forces. Therefore, they are usually performed reinforced. Such a reinforced version is carried out by a further sheet metal layer which is applied in this area. This additional sheet metal layer is commonly referred to as a bolt plate or locking plate.

Aus der DE 298 24 867 U1 ist ein Kran mit einem Teleskopausleger bekannt, dessen einzeln austeleskopierbare Schüsse aus Profilrohren bestehen und eine eine Ausnehmung aufweisende Verbolzstelle aufweisen.From the DE 298 24 867 U1 a crane with a telescopic boom is known, the individual austeleskopierbare shots consist of profile tubes and have a recess having a Verbolzstelle.

Die Verbolzteller bzw. Verriegelungsbleche werden an der Verbolzstelle auf das Profilrohr aufgeschweißt. Durch das aufgeschweißte Blech werden einerseits die Verbolzstellen verstärkt. Andererseits wird das Grundmaterial des Teleskopschusses aber durch den Schweißvorgang belastet. Der Schweißvorgang selbst ist aufwendig und muss von geschultem Personal durchgeführt werden. Dies wiederum führt zu einer Verteuerung der Fertigungskosten.The bolt plates or locking plates are welded onto the profile tube at the bolting point. On the one hand, the bolted joints are reinforced by the welded-on sheet metal. On the other hand, the basic material of the telescope shot but burdened by the welding process. The welding process itself is expensive and must be carried out by trained personnel. This in turn leads to an increase in the cost of production.

Aufgabe der vorliegenden Erfindung ist es, einen gattungsgemäßen Teleskopschuß mit einer einfach aufzubringenden und damit kostengünstigen Verstärkung im Bereich der Verbolzstelle zu versehen.Object of the present invention is to provide a generic telescope shot with a simple to apply and thus cost-effective reinforcement in the field of Verbolzstelle.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Nach dieser Lösung wird ein Teleskopschuß, der aus einem Profilrohr mit mindestens einer eine Ausnehmung aufweisende Verbolzstelle besteht, dadurch durch Bleche verstärkt, dass auf beiden Seiten des Profilrohrs die Verbolzstelle verstärkende Bleche aufgeklebt sind.According to the invention, this object is solved by the features of claim 1. After this solution, a telescopic weft, which consists of a profile tube with at least one recess having a Verbolzstelle, thereby reinforced by sheets that the Verbolzstelle reinforcing plates are glued on both sides of the profile tube.

Durch diese erfindungsgemäße Lösung wird ein Schweißvorgang vermieden. Der Klebeprozeß ist kostengünstiger und belastet das Grundmaterial des Teleskopschusses im Gegensatz zu einem Schweißvorgang nicht. Somit können die Teleskopschüsse wesentlich einfacher und kostengünstiger gefertigt werden. Darüber hinaus ist die Fläche zwischen dem Profilrohr des Teleskopschusses einerseits und dem Verstärkungsblech andererseits durch den Kleber versiegelt. Damit ist ein entsprechend guter Schutz vor Korrosion vorhanden.By this solution according to the invention, a welding operation is avoided. The bonding process is less expensive and does not burden the base material of the telescopic section, in contrast to a welding operation. Thus, the telescopic shots can be made much easier and cheaper. In addition, the surface between the profile tube of the telescopic section on the one hand and the reinforcing plate on the other hand is sealed by the adhesive. This provides a correspondingly good protection against corrosion.

Bevorzugte Ausgestaltungen der Erfindung ergeben sich aus den sich an den Hauptanspruch anschließenden Unteransprüchen.Preferred embodiments of the invention will become apparent from the subsequent claims to the main claim.

Zweckmäßig ist es, wenn die die Verbolzstelle verstärkenden Bleche kreisförmig sind und ihre zur Aufnahme des Bolzens dienende Ausnehmung mittig angeordnet ist. Im Rahmen der Erfindung können die verstärkenden Bleche aber auch jede beliebige andere Form, beispielsweise eine Rechteckform, eine Quadratform aufweisen. Genauso kann die Form der Ausnehmung im Teleskoprohr bzw. Anlenkschuß beliebig sein. Es ist auch möglich, dass die Verbolzstelle im Verbolzteller außermittig angeordnet ist.It is useful if the Verbolzstelle reinforcing sheets are circular and their serving to receive the pin recess is arranged centrally. In the context of the invention, however, the reinforcing sheets may also have any other shape, for example a rectangular shape, a square shape. Similarly, the shape of the recess in the telescopic tube or Anlenkschuß be arbitrary. It is also possible that the Verbolzstelle is located in the Verbolzteller off-center.

Die die Verbolzstelle verstärkenden Bleche können vorteilhaft eine zu ihrer Ausnehmung hin zunehmende Dicke aufweisen.The plates which reinforce the bolting point may advantageously have a thickness which increases towards its recess.

Zweckmäßig ist die Ausnehmung im Profilrohr so dimensioniert, dass sie einen Vorsprung der die Verbolzstelle verstärkenden Bleche aufnimmt. Hier liegt der Vorteil darin, dass in der Verbindungsstelle zwischen Verbolzteller und Teleskopprofil bereits eine formschlüssige Verbindung hergestellt wird. Die Ausnehmung des Teleskopprofils definiert hier genau die Stelle, in welcher der Verbolzteller positioniert werden muss, so dass die Anordnung des Verbolztellers bei der Montage zusätzlich erleichtert wird.Suitably, the recess in the profile tube is dimensioned so that it receives a projection of the Verbolzstelle reinforcing plates. Here, the advantage lies in the fact that already in the connection point between the bolt plate and telescopic profile a positive connection is made. The recess of the telescopic profile defined here exactly the place in which the bolt plate must be positioned, so that the arrangement of the bolt plate is additionally facilitated during assembly.

Weiterhin können die die Verbolzstelle verstärkenden Bleche im Bereich ihrer Vorsprünge innerhalb der Ausnehmung des Profilrohrs miteinander verklebt sein, während sie außerhalb der Ausnehmung auf das Profilrohr aufgeklebt sind.Furthermore, the Verbolzstelle reinforcing sheets may be glued together in the region of their projections within the recess of the profile tube, while they are glued outside the recess on the profile tube.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung können die die Verbolzstelle verstärkenden Bleche mit ihrer Ausnehmung deckungsgleich mit der Ausnehmung des Profilrohres abschließen. Hierdurch kann die Verbolzstelle und die Verbolzteller besonders einfach und kostengünstig gefertigt werden.According to a further advantageous embodiment of the invention, the Verbolzstelle reinforcing plates can complete with their recess congruent with the recess of the profile tube. This allows the Verbolzstelle and the Verbolzteller be made particularly simple and inexpensive.

Zweckmäßig können die Ausnehmungen des Profilrohrs geringfügig größer sein als die Ausnehmungen der die Verbolzstelle verstärkenden Bleche, so dass diese über den Rand der Ausnehmung des Profilrohres hinausragen.Suitably, the recesses of the profile tube may be slightly larger than the recesses of the Verbolzstelle reinforcing plates, so that they protrude beyond the edge of the recess of the profile tube.

Gemäß vorteilhafter Ausgestaltungen der Erfindung kann die Verbolzstelle im Obergurt, in einer oder beiden der Seitenwände und/oder dem Untergurt des Profilrohres angeordnet sein.According to advantageous embodiments of the invention, the Verbolzstelle can be arranged in the upper flange, in one or both of the side walls and / or the lower flange of the profile tube.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung werden anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert. Es zeigen:

Figur 1:
einen Schnitt durch ein Detail eines Teleskopschusses mit einer Verbolzstelle nach einer ersten Ausführungsform der Erfindung und
Figur 2:
eine Ansicht gemäß Figur 1 einer alternativen Ausführungsvariante der vorliegenden Erfindung.
Further features, details and advantages of the invention will be explained in more detail with reference to the embodiments illustrated in the drawings. Show it:
FIG. 1:
a section through a detail of a telescopic section with a Verbolzstelle according to a first embodiment of the invention and
FIG. 2:
a view according to FIG. 1 an alternative embodiment of the present invention.

In Figur 1 ist ein Schnitt durch ein Detail eines Teleskopschusses 10 gezeigt. Im einzelnen ist hier ein Obergurt 12 des den Teleskopschuß 10 bildenden Profilrohres gezeigt, welches eine Ausnehmung 22 aufweist, durch die ein hier nicht näher dargestellter Bolzen zur Herstellung einer Bolzenverbindung einsteckbar ist.In FIG. 1 a section through a detail of a telescopic section 10 is shown. In particular, an upper flange 12 of the telescopic section 10 forming profile tube is shown here, which has a recess 22 through which a not shown here pin for making a bolt connection can be inserted.

In der Darstellung gemäß Figur 1 ist nur ein Teleskopschuß 10 gezeigt, der nach Ausschieben mit einem anderen Teleskopschuß mit entsprechender Verbolzstelle verbolzt werden soll. Die Art und Weise eines derartigen Verbolzvorganges ist allgemein bekannt und wird daher an dieser Stelle nicht nochmals im einzelnen dargestellt. Die im Ausführungsbeispiel hinsichtlich eines Teleskopschusses 10 getroffenen Aussagen finden in gleicher Weise auf einen Anlenkschuß Anwendung.In the illustration according to FIG. 1 only one telescopic weft 10 is shown, which is to be bolted after pushing out with another telescopic weft with appropriate Verbolzstelle. The manner of such a Verbolzvorganges is well known and will therefore not be shown again in detail at this point. The statements made in the exemplary embodiment with regard to a telescopic section 10 statements apply in the same way to a Anlenkschuß application.

Im Bereich der Verbolzstelle 14 weist der Obergurt 12 des Teleskopschusses 10 Verstärkungen in Form von aufgebrachten Blechen 16 und 18 auf. Wie in der Figur 1 dargestellt, ist ein Blech 16 von oben auf den Obergurt aufgelegt, während das andere Blech 18 von unten auf den Obergurt aufgelegt ist. Gemäß der vorliegenden Erfindung werden die Bleche 16 und 18 jeweils mit dem Obergurt 12 verklebt. Hierdurch bilden sich zwischen dem Obergurt 12 einerseits und den Blechen 16 und 18 andererseits Klebeflächen 20. Diese Klebeflächen 20 versiegeln den Obergurt im Verstärkungsbereich und beugen dadurch einer Korrosion an dieser Stelle vor.In the area of the bolting point 14, the upper flange 12 of the telescopic section 10 has reinforcements in the form of applied metal sheets 16 and 18. Like in the FIG. 1 shown, a plate 16 is placed from above on the upper belt, while the other sheet 18 is placed from below on the top flange. According to the present invention, the sheets 16 and 18 are glued to the top chord 12, respectively. This forms between the top flange 12 on the one hand and the sheets 16 and 18 on the other hand adhesive surfaces 20. These adhesive surfaces 20 seal the top flange in the gain region and thereby prevent corrosion at this point.

In der Ausführungsvariante gemäß Figur 1 ist die Ausnehmung 22 im Profilrohr größer ausgebildet als der Durchmesser des hier nicht näher dargestellten Steckbolzens. Eine dem Durchmesser des Steckbolzens zur Verbindung geeignete entsprechende Ausnehmung weisen dagegen die im übrigen kreisrund ausgebildeten Bleche 16 und 18 auf, die zur Verstärkung der Verbolzstelle 14 dienen. Im unmittelbar an die Ausnehmung 24 der Bleche 16 und 18 anschließenden Bereich weisen diese Bleche 16 und 18 jeweils einen Vorsprung 26 auf, der so dimensioniert ist, dass durch den entsprechend gebildeten Absatz die Bleche 16 und 18 im Bereich der Ausnehmung 22 im Profilrohr 12 anliegen (vgl. Figur 1). Die Vorsprünge 26 sind weiterhin so dimensioniert, dass die Bleche 16 und 18 im Bereich der Ausnehmung 22 des Profilrohrs 12 flächig miteinander durch eine Klebefläche 20 verbunden sind. In dieser Ausführungsform ist also die Ausnehmung 22 des Obergurts 12 bearbeitet und liegt definiert an dem Vorsprung 26 der Bleche 16 und 18 an. Somit kann die Ausnehmung im Teleskopprofil als Positionierhilfe für die Bleche 16 und 18 beim Kleben verwendet werden. Zusätzlich ist zu der Klebefläche 20 noch eine formschlüssige Verbindung zwischen den Blechen 16 und 18 und dem Obergurt geschaffen.In the embodiment according to FIG. 1 the recess 22 is formed in the profile tube larger than the diameter of the plug pin not shown here. On the other hand, a recess corresponding to the diameter of the plug-in pin for connection has the otherwise circularly formed plates 16 and 18 which serve to reinforce the bolting point 14. Im immediate to the recess 24 of the sheets 16 and 18 subsequent area, these sheets 16 and 18 each have a projection 26 which is dimensioned so that the plates 16 and 18 in the recess 22 in the profile tube 12 abut by the correspondingly formed paragraph (see , FIG. 1 ). The projections 26 are further dimensioned so that the sheets 16 and 18 in the region of the recess 22 of the profile tube 12 are connected to each other in area by an adhesive surface 20. In this embodiment, therefore, the recess 22 of the upper belt 12 is machined and defined on the projection 26 of the sheets 16 and 18 at. Thus, the recess in the telescopic profile can be used as a positioning aid for the sheets 16 and 18 during bonding. In addition to the adhesive surface 20 is still a positive connection between the sheets 16 and 18 and the upper flange created.

Von weiterem Vorteil kann es sein, wenn die Bleche 16 und 18 zu ihrer Ausnehmung 24 hin eine zunehmende Dicke aufweisen. Diese Dicke kann, wie in Figur 1 dargestellt ist, stufenartig zunehmen.It may be of further advantage if the sheets 16 and 18 have an increasing thickness towards their recess 24. This thickness can, as in FIG. 1 is shown, gradually increase.

Die Ausführungsvariante der Figur 2 entspricht im wesentlichen derjenigen gemäß Figur 1. Hier ist jedoch bei den Blechen 16 und 18 kein Vorsprung 26 vorgesehen. In der hier dargestellten Ausführungsvariante werden vollständig ebene Klebestellen 20 zwischen den Blechen 16 und 18 einerseits und dem Obergurt 12 andererseits geschaffen. Die Ausnehmung 22 im Obergurt 12 und die Ausnehmungen 24 in den Blechen 16 und 18 weisen im wesentlichen den gleichen Durchmesser auf. Dadurch ist der Obergurt 12 selbst Teil der Verbolzstelle. Jede Klebefläche 20 weist eine gewisse Elastizität auf, so dass hierüber zusätzlich Maßschwankungen, die auftreten können, ausgeglichen werden. Man kann die Elastizität der Klebestellen 20 aber auch bewußt ausnützen. In diesem Fall können die Bleche 16 und 18 etwas weiter über das Grundmaterial des Obergurtes 12 in die Verbolzstelle hineinragen, wie dies in der Figur 2 nicht dargestellt ist. Entsprechend dieser Ausführungsvariante gemäß Figur 2 lassen sich die Verbolzstellen 14 in besonders einfacher und kostengünstiger Weise herstellen.The variant of the FIG. 2 corresponds essentially to that according to FIG. 1 , Here, however, no projection 26 is provided in the sheets 16 and 18. In the embodiment shown here completely flat splices 20 between the sheets 16 and 18 on the one hand and the upper flange 12 on the other hand created. The recess 22 in the top flange 12 and the recesses 24 in the sheets 16 and 18 have substantially the same diameter. As a result, the upper flange 12 itself is part of the Verbolzstelle. Each adhesive surface 20 has a certain elasticity, so that additionally dimensional fluctuations that can occur are compensated. One can also take advantage of the elasticity of the splices 20 but consciously. In this case, the plates 16 and 18 may protrude further beyond the base material of the upper flange 12 in the Verbolzstelle, as in the FIG. 2 not shown. According to this embodiment according to FIG. 2 let the Verbolzstellen 14 produce in a particularly simple and cost-effective manner.

Claims (8)

  1. A telescopic section (10) comprising a section tube (12) having at least one bolting point (14) which has a cut-out (22) and is reinforced by metal sheets (16,18),
    characterised in that
    the metal sheets (16, 18) reinforcing the bolting point (14) at both sides of the section tube (12) are adhesively bonded on.
  2. A telescopic section in accordance with claim 1, characterised in that the metal sheets (16, 18) reinforcing the bolting point (14) are circular and their cut-out (24) serving the reception of a bolt is arranged centrally.
  3. A telescopic section in accordance with either of claims 1 or 2, characterised in that the metal sheets (16, 18) reinforcing the bolting point (14) have a thickness increasing toward their cut-out (24).
  4. A telescopic section in accordance with one of the claims 1 to 3, characterised in that the cut-out (22) in the section tube (12) is dimensioned such that it receives a projection (26) of the metal sheets (16, 18) reinforcing the bolting point (14).
  5. A telescopic section in accordance with claim 4, characterised in that the metal sheets (16, 18) reinforcing the bolting point (14) are adhesively bonded to one another in the region of their projections (26) within the cut-out (22) of the section tube (12), whereas they are adhesively bonded onto the section tube (12) outside the cut-out (22).
  6. A telescopic section in accordance with one of the claims 1 to 4, characterised in that the cut-out (24) of the metal sheets (16, 18) reinforcing the bolting point (14) terminates flush with the cut-out (22) of the section tube (12).
  7. A telescopic section in accordance with one of the claims 1 to 3, characterised in that the cut-out (22) of the section tube(12) is slightly larger than the cut-outs (24) of the metal sheets (16, 18) reinforcing the bolting point (14) so that they project beyond the margin of the cut-out (22) of the section tube (12).
  8. A telescopic section in accordance with one of the claims 1 to 7, characterised in that the bolting point (14) is arranged in the top chord (12), in one or both side walls and/or in the bottom chord of the section tube.
EP20070022978 2006-12-21 2007-11-27 Telescopic section Expired - Fee Related EP1935834B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200620019308 DE202006019308U1 (en) 2006-12-21 2006-12-21 telescopic section

Publications (2)

Publication Number Publication Date
EP1935834A1 EP1935834A1 (en) 2008-06-25
EP1935834B1 true EP1935834B1 (en) 2011-09-28

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EP20070022978 Expired - Fee Related EP1935834B1 (en) 2006-12-21 2007-11-27 Telescopic section

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EP (1) EP1935834B1 (en)
DE (1) DE202006019308U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010013544U1 (en) * 2010-09-23 2012-01-19 Liebherr-Werk Ehingen Gmbh Telescopic weft and crane with telescopic weft
DE202019101975U1 (en) 2019-04-05 2019-04-15 Manitowoc Crane Group France Sas Telescopic shot with sheet metal reinforcement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193544A (en) * 1968-02-28 1970-06-03 Jones Cranes Ltd Improvements in or relating to Cranes.
DE4018222A1 (en) * 1990-06-07 1991-12-12 Krupp Industrietech TELESCOPIC BOOM WITH CLUTCH DEVICE FOR EXTENSION ARRANGEMENT
DE29824867U1 (en) 1997-05-28 2003-03-06 Demag Mobile Cranes Gmbh & Co Crane with telescopic boom - has individual sections movable by hydraulic piston cylinder unit whose displaceable element has at inner and outer ends security locking units to couple with recesses in telescopic sections
ATE286849T1 (en) * 1999-04-29 2005-01-15 Terex Demag Gmbh & Co Kg CRANE WITH A TELESCOPIC BOOM
US6786233B1 (en) * 2001-02-23 2004-09-07 Schwing America, Inc. Boom utilizing composite material construction

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DE202006019308U1 (en) 2008-04-30
EP1935834A1 (en) 2008-06-25

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