EP0503227A1 - Sectional boom for a tower crane - Google Patents

Sectional boom for a tower crane Download PDF

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Publication number
EP0503227A1
EP0503227A1 EP92100529A EP92100529A EP0503227A1 EP 0503227 A1 EP0503227 A1 EP 0503227A1 EP 92100529 A EP92100529 A EP 92100529A EP 92100529 A EP92100529 A EP 92100529A EP 0503227 A1 EP0503227 A1 EP 0503227A1
Authority
EP
European Patent Office
Prior art keywords
boom
segments
fitting elements
coding
cantilever
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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.)
Granted
Application number
EP92100529A
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German (de)
French (fr)
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EP0503227B1 (en
Inventor
Heinz Ehmann
Ewald Kloos
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MAN GHH Logistics GmbH
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MAN GHH Logistics GmbH
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Application filed by MAN GHH Logistics GmbH filed Critical MAN GHH Logistics GmbH
Publication of EP0503227A1 publication Critical patent/EP0503227A1/en
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Publication of EP0503227B1 publication Critical patent/EP0503227B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • 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

Definitions

  • the invention relates to a dismountable boom for a tower crane, in particular a construction tower crane, comprising a plurality of boom segments which are arranged one behind the other in the longitudinal direction of the boom and are detachably connected to one another.
  • Construction cranes are usually broken down into segments, transported and assembled at the operating site with regard to both their tower and their jib.
  • the boom segments often have the same dimensions, and the frame structures of the individual boom segments also have a great similarity, although the rod cross-sections, which determine the load-bearing capacity of the boom, vary according to the location of the segment within the boom.
  • the boom segments are usually identified by embossed or painted numbers or the like so that their installation location within the boom is fixed, it can be due to the similarity of the boom segments and their same dimensions in particular of the connecting couplings to assembly errors, which would unduly weaken the load capacity of the crane.
  • the boom can often be put together from a set of existing boom segments using the modular principle. Since predetermined installation locations of the individual boom segments must also be observed here, installation errors and an unintentional reduction in the lifting capacity of the crane can also occur.
  • pairs of mutually complementary coding fitting elements are provided at mutually adjacent longitudinal ends of the cantilever segments, which allow each cantilever element to be connected only in a predetermined local position relative to the other cantilever segments, the pairs of fitting elements being deviated from one another predetermined position keep the associated boom elements at a distance from each other, which prevents the connection of the boom segments.
  • the fitting elements ensure that each boom segment can only be installed in the installation position and in the orientation for which it is dimensioned with regard to its load-bearing capacity. In the case of fitting elements that do not belong together, the coupling members between adjacent cantilever segments cannot be closed.
  • the coding mating elements can have multiple mating surfaces have, the shape and location relative to each other determine the coding. In a preferred embodiment, however, the coding fitting elements all have the same shape and dimensions, which considerably simplifies production.
  • the coding is determined by the position in which the fitting elements are attached to the ends of the cantilever segments.
  • the fitting elements can be provided on a cross-member of the frame structure of the boom segments, which cross-section may be present anyway, the transverse position on the cross-member determining the coding.
  • the coding fitting elements are designed as hole-and-pin fitting elements which can be plugged in the longitudinal direction of the boom.
  • the pin engages at the front end of the one boom segment in the hole provided on the opposite front end of the other boom segment, and the coupling members of the boom segments can be closed. If the pin is not aligned with the hole, it forms a stop which prevents the coupling elements from closing.
  • Fig. 1 shows a construction site tower crane with a tower 1 and a boom 3.
  • the boom 3 is for transport can be dismantled and consists of a plurality of boom segments 5 arranged one behind the other in the longitudinal direction in the form of frame constructions which are detachably coupled to one another at their ends 7 via coupling members, here in the form of sleeves 9 and plug pins 11 (FIG. 2).
  • the pins 11 can be inserted into the sleeves 9 in the longitudinal direction of the boom 3 and can be coupled to one another via transverse bolts or the like.
  • the individual boom segments 5 must be mounted in a predetermined local position relative to one another.
  • the ends 7 of the individual boom segments 5 are closely adjacent with the boom 3 in the assembled state Cross members 13 provided.
  • a pair of fitting elements consisting of a fitting hole 15 and a fitting pin 17 protruding in the longitudinal direction of the arm 3 is assigned to each pair of opposing crossbeams 13.
  • Each of the boom segments 5 thus has a fitting pin on one side and a fitting hole on its other side.
  • the fitting holes 15 are the same size as each other, as are the fitting pins 17, both in terms of diameter and length.
  • the position of each pair of fitting holes and fitting pins along the crossmember 13 is selected so that only corresponding to the crane construction mutually assigned boom segments 5 can be inserted into each other so far that the couplings formed from the sleeves 9 and the pins 11 can be locked.
  • 2a and 2b show the relationships in different coupling levels with the boom segments not merged, the the sleeves 9-bearing end in front view and the end bearing the pin 11 is drawn in plan view.
  • 3 shows the situation when the coupling is closed and the pin 19 is inserted, which locks the pin 11 in the sleeve 9.
  • the fitting pin 17 penetrates the fitting hole 15. If an attempt is made to couple cantilever segments which do not belong together, the pin 17 abuts the crossbar 13 of the adjacent boom segment, and the bolt 19 can not be inserted
  • the cross members 13 can be a construction part of the frame construction of the boom segment 5; but it can also be welded in as an additional part that only serves for coding.
  • the embodiment shows cylindrical fitting elements.
  • Other shapes, in particular rectangular or square fitting elements, can also be used.
  • several pairs of fitting elements can be provided for coding on each of the end faces of the cantilever segments.

Abstract

In order to prevent boom segments (5), which do not belong together, of a sectional boom for a tower crane being mounted on one another, there are provided, on the front ends of the boom segments, fitting element pairs (15, 17) which prevent the coupling of boom segments (5) which do not belong together. The fitting element pairs (15, 17) expediently have identical form from boom segment to boom segment, but are arranged in different positions on the front ends. <IMAGE>

Description

Die Erfindung betrifft einen zerlegbaren Ausleger für einen Turmkran, insbesondere einen Bau-Turmkran, umfassend mehrere in Auslegerlängsrichtung hintereinander angeordnete, lösbar miteinander verbundene Auslegersegmente.The invention relates to a dismountable boom for a tower crane, in particular a construction tower crane, comprising a plurality of boom segments which are arranged one behind the other in the longitudinal direction of the boom and are detachably connected to one another.

Baukräne werden üblicherweise sowohl hinsichtlich ihres Turms als auch hinsichtlich ihres Auslegers in Segmente zerlegt, transportiert und am Betriebsort zusammengesetzt. Die Auslegersegmente haben vielfach gleiche Abmessungen, und auch die Rahmenkonstruktionen der einzelnen Auslegersegmente haben große Ähnlichkeit, wenngleich die Stabquerschnitte, durch die die Tragfähigkeit des Auslegers bestimmt ist, dem Einbauort des Segments innerhalb des Auslegers entsprechend variiert. Zwar sind die Auslegersegmente normalerweise durch eingeschlagene oder aufgemalte Ziffern oder dergleichen gekennzeichnet, so daß ihr Einbauort innerhalb des Auslegers festliegt, doch kann es aufgrund der Ähnlichkeit der Auslegersegmente und ihrer gleichen Abmessungen insbesondere auch der Verbindungskupplungen zu Zusammenbaufehlern kommen, durch die die Tragfähigkeit des Krans unzulässig geschwächt würde.Construction cranes are usually broken down into segments, transported and assembled at the operating site with regard to both their tower and their jib. The boom segments often have the same dimensions, and the frame structures of the individual boom segments also have a great similarity, although the rod cross-sections, which determine the load-bearing capacity of the boom, vary according to the location of the segment within the boom. Although the boom segments are usually identified by embossed or painted numbers or the like so that their installation location within the boom is fixed, it can be due to the similarity of the boom segments and their same dimensions in particular of the connecting couplings to assembly errors, which would unduly weaken the load capacity of the crane.

Um die Länge des Auslegers variieren zu können, kann der Ausleger vielfach nach dem Baukastenprinzip aus einem Satz vorhandener Auslegersegmente zusammengestellt werden. Da auch hierbei vorbestimmte Einbauorte der einzelnen Auslegersegmente beachtet werden müssen, kann es ebenfalls zu Einbaufehlern und zu einer unbeabsichtigten Verringerung der Tragkraft des Krans kommen.In order to be able to vary the length of the boom, the boom can often be put together from a set of existing boom segments using the modular principle. Since predetermined installation locations of the individual boom segments must also be observed here, installation errors and an unintentional reduction in the lifting capacity of the crane can also occur.

Es ist Aufgabe der Erfindung, einen zerlegbaren Ausleger für einen Turmkran, insbesondere einen Bau-Turmkran, anzugeben, bei welchem Montagefehler mit Sicherheit vermieden werden.It is an object of the invention to provide a collapsible boom for a tower crane, in particular a construction tower crane, in which assembly errors are avoided with certainty.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß an einander paarweise benachbarten Längsenden der Auslegersegmente Paare zueinander komplementärer Kodierungs-Paßelemente vorgesehen sind, die eine Verbindung jedes Auslegerelements ausschließlich in einer vorbestimmten örtlichen Lage relativ zu den übrigen Auslegersegmenten zulassen, wobei die Paßelementpaare bei einer Abweichung von der vorbestimmten Lage die zugeordneten Auslegerelemente in einem Abstand voneinander halten, der die Verbindung der Auslegersegmente verhindert. Die Paßelemente sorgen dafür, daß jedes Auslegersegment ausschließlich in der Einbaulage und in der Orientierung montiert werden kann, für die es hinsichtlich seiner Tragfähigkeit bemessen ist. Bei nicht zusammengehörenden Paßelementen können die Kupplungsorgane zwischen benachbarten Auslegersegmenten nicht geschlossen werden.This object is achieved in that pairs of mutually complementary coding fitting elements are provided at mutually adjacent longitudinal ends of the cantilever segments, which allow each cantilever element to be connected only in a predetermined local position relative to the other cantilever segments, the pairs of fitting elements being deviated from one another predetermined position keep the associated boom elements at a distance from each other, which prevents the connection of the boom segments. The fitting elements ensure that each boom segment can only be installed in the installation position and in the orientation for which it is dimensioned with regard to its load-bearing capacity. In the case of fitting elements that do not belong together, the coupling members between adjacent cantilever segments cannot be closed.

Die Kodierungs-Paßelemente können mehrere Paßflächen haben, deren Form und Lage relativ zueinander die Kodierung festlegen. In einer bevorzugten Ausgestaltung haben die Kodierungs-Paßelemente jedoch sämtlich gleiche Form und gleiche Abmessungen, was die Herstellung beträchtlich vereinfacht. Die Kodierung wird hierbei durch die Lage, in der die Paßelemente an den Stirnenden der Auslegersegmente angebracht sind, bestimmt. Beispielsweise können die Paßelemente an einer gegebenenfalls ohnehin vorhandenen Traverse der Rahmenkonstruktion der Auslegersegmente vorgesehen sein, wobei die Querposition auf der Traverse die Kodierung bestimmt.The coding mating elements can have multiple mating surfaces have, the shape and location relative to each other determine the coding. In a preferred embodiment, however, the coding fitting elements all have the same shape and dimensions, which considerably simplifies production. The coding is determined by the position in which the fitting elements are attached to the ends of the cantilever segments. For example, the fitting elements can be provided on a cross-member of the frame structure of the boom segments, which cross-section may be present anyway, the transverse position on the cross-member determining the coding.

In einer besonders einfachen Variante sind die KodierungsPaßelemente als in Auslegerlängsrichtung steckbare Loch-Zapfen-Paßelemente ausgebildet. Bei einander zugeordneten Paßelementen greift der Zapfen am Stirnende des einen Auslegersegments in das am gegenüberliegenden Stirnende des anderen Auslegersegments vorgesehene Loch ein, und die Kupplungsorgane der Auslegersegmente können geschlossen werden. Fluchtet der Zapfen nicht mit dem Loch, so bildet er einen Anschlag, der das Schließen der Kupplungsorgane verhindert.In a particularly simple variant, the coding fitting elements are designed as hole-and-pin fitting elements which can be plugged in the longitudinal direction of the boom. In the case of mating elements which are assigned to one another, the pin engages at the front end of the one boom segment in the hole provided on the opposite front end of the other boom segment, and the coupling members of the boom segments can be closed. If the pin is not aligned with the hole, it forms a stop which prevents the coupling elements from closing.

Im folgenden soll die Erfindung anhand einer Zeichnung näher erläutert werden. Hierbei zeigt:

Fig. 1
eine schematische Darstellung eines BauTurmkrans;
Fig. 2a und 2b
in Längsrichtung des Auslegers hintereinander angeordnete Kodierungs-Paßelemente und
Fig. 3
eine Schnittansicht durch den Ausleger, gesehen einer Linie III-III in Fig. 1.
The invention will be explained in more detail below with reference to a drawing. Here shows:
Fig. 1
a schematic representation of a tower crane;
2a and 2b
in the longitudinal direction of the bracket arranged one behind the other coding fitting elements and
Fig. 3
a sectional view through the boom, seen a line III-III in Fig. 1st

Fig. 1 zeigt einen Baustellen-Turmkran mit einem Turm 1 und einem Ausleger 3. Der Ausleger 3 ist für den Transport zerlegbar und besteht aus mehreren in Langsrichtung hintereinander angeordneten Auslegersegmenten 5 in Form von Rahmenkonstruktionen, die an ihren Stirnenden 7 über Kupplungsorgane, hier in Form von Hülsen 9 und Steckzapfen 11 lösbar miteinander gekuppelt sind (Fig. 2). Die Zapfen 11 sind in Langsrichtung des Auslegers 3 in die Hülsen 9 einführbar und über Querbolzen oder dergleichen miteinander kuppelbar.Fig. 1 shows a construction site tower crane with a tower 1 and a boom 3. The boom 3 is for transport can be dismantled and consists of a plurality of boom segments 5 arranged one behind the other in the longitudinal direction in the form of frame constructions which are detachably coupled to one another at their ends 7 via coupling members, here in the form of sleeves 9 and plug pins 11 (FIG. 2). The pins 11 can be inserted into the sleeves 9 in the longitudinal direction of the boom 3 and can be coupled to one another via transverse bolts or the like.

Die einzelnen Auslegersegmente 5 müssen in vorbestimmter örtlicher Lage relativ zueinander montiert werden. Um trotz vielfach gleicher Außenabmessungen und nur wenig voneinander abweichender Bemessung der Rahmenkonstruktion, insbesondere deren Stabquerschnitte, Einbaufehler zu vermeiden, die zu einer Schwächung der Tragfähigkeit des Krans führen könnten, sind die Stirnenden 7 der einzelnen Auslegersegmente 5 mit in montiertem Zustand des Auslegers 3 eng benachbarten Quertraversen 13 versehen. Jedem Paar einander gegenüberliegender Quertraversen 13 ist ein Paßelementpaar bestehend aus einem Passungsloch 15 und einem in Längsrichtung des Auslegers 3 abstehenden Passungszapfen 17 zugeordnet. Jedes der Auslegersegmente 5 hat damit auf seiner einen Seite einen Passungszapfen und auf seiner anderen Seite ein Passungsloch. Die Passungslöcher 15 haben untereinander gleiche Größe, ebenso auch die Passungszapfen 17, und zwar sowohl hinsichtlich des Durchmessers als auch der Länge. Die Lage jedes Passungsloch-Passungszapfen-Paars entlang der Quertraverse 13 ist so gewählt, daß lediglich entsprechend der Krankonstruktion einander zugeordnete Auslegersegmente 5 so weit ineinander gesteckt werden können, daß die aus den Hülsen 9 und den Zapfen 11 gebildeten Kupplungen verriegelt werden können. Die Fig. 2a und 2b zeigen die Verhältnisse in verschiedenen Kupplungsebenen bei nicht zusammengeführten Auslegersegmenten, wobei das die Hülsen 9 tragende Stirnende in Stirnansicht und das die Zapfen 11 tragende Ende in Draufsicht gezeichnet ist. Fig. 3 zeigt die Verhältnisse bei geschlossener Kupplung und eingeführtem, den Zapfen 11 in der Hülse 9 verriegelnden Bolzen 19. Wie dargestellt, durchdringt der Paßzapfen 17 das Paßloch 15. Wird versucht, nicht zusammengehörende Auslegersegmente miteinander zu kuppeln, so stößt der Zapfen 17 an die Quertraverse 13 des benachbarten Auslegersegments, und der Bolzen 19 kann nicht eingeschoben werden.The individual boom segments 5 must be mounted in a predetermined local position relative to one another. In order to avoid installation errors that could lead to a weakening of the load-bearing capacity of the crane, in spite of the fact that the outer dimensions of the frame construction, in particular the cross-sections of the bars, differing only slightly from one another, which could lead to a weakening of the load-bearing capacity of the crane, the ends 7 of the individual boom segments 5 are closely adjacent with the boom 3 in the assembled state Cross members 13 provided. A pair of fitting elements consisting of a fitting hole 15 and a fitting pin 17 protruding in the longitudinal direction of the arm 3 is assigned to each pair of opposing crossbeams 13. Each of the boom segments 5 thus has a fitting pin on one side and a fitting hole on its other side. The fitting holes 15 are the same size as each other, as are the fitting pins 17, both in terms of diameter and length. The position of each pair of fitting holes and fitting pins along the crossmember 13 is selected so that only corresponding to the crane construction mutually assigned boom segments 5 can be inserted into each other so far that the couplings formed from the sleeves 9 and the pins 11 can be locked. 2a and 2b show the relationships in different coupling levels with the boom segments not merged, the the sleeves 9-bearing end in front view and the end bearing the pin 11 is drawn in plan view. 3 shows the situation when the coupling is closed and the pin 19 is inserted, which locks the pin 11 in the sleeve 9. As shown, the fitting pin 17 penetrates the fitting hole 15. If an attempt is made to couple cantilever segments which do not belong together, the pin 17 abuts the crossbar 13 of the adjacent boom segment, and the bolt 19 can not be inserted.

Bei den Quertraversen 13 kann es sich um ein Konstruktionsteil der Rahmenkonstruktion des Auslegersegments 5 handeln; es kann aber auch als zusätzliches, nur der Kodierung dienendes Teil eingeschweißt sein.The cross members 13 can be a construction part of the frame construction of the boom segment 5; but it can also be welded in as an additional part that only serves for coding.

Das Ausführungsbeispiel zeigt zylindrische Paßelemente. Es können auch andere Formen, insbesondere rechteckförmige oder quadratische Paßelemente benutzt werden. Weiterhin können mehrere Paßelementpaare zur Kodierung an jedem der Stirnenden der Auslegersegmente vorgesehen sein.The embodiment shows cylindrical fitting elements. Other shapes, in particular rectangular or square fitting elements, can also be used. Furthermore, several pairs of fitting elements can be provided for coding on each of the end faces of the cantilever segments.

Claims (4)

Zerlegbarer Ausleger für einen Turmkran, insbesondere einen Bau-Turmkran, umfassend mehrere in Auslegerlängsrichtung hintereinander angeordnete, lösbar miteinander verbundene Auslegersegmente (5),
dadurch gekennzeichnet, daß an einander paarweise benachbarten Längsenden der Auslegersegmente (5) Paare zueinander komplementärer Kodierungs-Paßelemente (15, 17) vorgesehen sind, die eine Verbindung jedes Auslegerelements (5) ausschließlich in einer vorbestimmten örtlichen Einbaulage relativ zu den übrigen Auslegersegmenten (5) zulassen, wobei die Paßelementpaare (15, 17) bei einer Abweichung von der vorbestimmten Einbaulage die zugeordneten Auslegerelemente (5) in einem Abstand voneinander halten, der die Verbindung der Auslegersegmente (5) verhindert.Dismountable boom for a tower crane, in particular a construction tower crane, comprising a plurality of boom segments (5) which are arranged one behind the other in the longitudinal direction of the boom and are detachably connected to one another,
characterized in that pairs of mutually complementary coding fitting elements (15, 17) are provided on the longitudinal ends of the cantilever segments (5) which are adjacent to one another and which connect each cantilever element (5) exclusively in a predetermined local installation position relative to the other cantilever segments (5) allow, the pairs of fitting elements (15, 17) in the event of a deviation from the predetermined installation position keeping the associated cantilever elements (5) at a distance from one another which prevents the cantilever segments (5) from being connected. Ausleger nach Anspruch 1, dadurch gekennzeichnet, daß die Form sämtlicher Kodierungs-Paßelemente (15, 17) gleich ist und ihre Kodierung durch die Lage, in der die Paßelemente (15, 17) an den Stirnenden angebracht sind, festgelegt ist.Boom according to claim 1, characterized in that the shape of all coding fitting elements (15, 17) is the same and their coding is determined by the position in which the fitting elements (15, 17) are attached to the front ends. Ausleger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Auslegersegmente (5) als Rahmenkonstruktion ausgebildet sind, von denen jede an ihren Längsenden (7) eine Traverse (13) aufweist, die der Traverse (13) des jeweils benachbarten Auslegersegments (5) gegenüberliegt, und daß die Paßelemente (15, 17) an den Traversen (13) in einer die Kodierung festlegenden Position vorgesehen sind.Boom according to claim 1 or 2, characterized in that the boom segments (5) are designed as a frame construction, each of which has at its longitudinal ends (7) a crossmember (13) which the crossmember (13) of the respectively adjacent boom segment (5) opposite, and that the fitting elements (15, 17) are provided on the cross members (13) in a position defining the coding. Ausleger nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die einander paarweise zugeordneten Kodierungs-Paßelemente als in Ausleger-Längsrichtung steckbare Loch-Zapfen-Paßelemente (15, 17) ausgebildet sind.Boom according to one of claims 1 to 3, characterized in that the coding-fitting elements assigned to one another in pairs are designed as hole-and-pin fitting elements (15, 17) which can be plugged in the longitudinal direction of the arm.
EP92100529A 1991-01-17 1992-01-14 Sectional boom for a tower crane Expired - Lifetime EP0503227B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4101291 1991-01-17
DE4101291A DE4101291A1 (en) 1991-01-17 1991-01-17 DETACHABLE EXTENSION FOR A TOWER CRANE

Publications (2)

Publication Number Publication Date
EP0503227A1 true EP0503227A1 (en) 1992-09-16
EP0503227B1 EP0503227B1 (en) 1994-11-30

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ID=6423214

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Application Number Title Priority Date Filing Date
EP92100529A Expired - Lifetime EP0503227B1 (en) 1991-01-17 1992-01-14 Sectional boom for a tower crane

Country Status (4)

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EP (1) EP0503227B1 (en)
AT (1) ATE114608T1 (en)
DE (2) DE4101291A1 (en)
ES (1) ES2069320T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103601083A (en) * 2013-11-26 2014-02-26 中联重科股份有限公司 Arm spike knot and tower crane comprising same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA116793A (en) * 1993-06-16 1998-07-15 Boesch Berndt CONSTRUCTION SITE CRANE
DE4339564C2 (en) * 1993-11-19 1996-03-28 Movietech Filmgeraete Gmbh Boom for camera dolly, crane or the like
DE202005008602U1 (en) * 2005-06-02 2006-10-19 Liebherr-Werk Biberach Gmbh boom

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080068A (en) * 1960-12-15 1963-03-05 Alphie O Felkner Sectional boom for cranes
US3511388A (en) * 1967-09-18 1970-05-12 Manitowoc Co Pin connection for elongate load supporting boom structure
FR2049423A5 (en) * 1969-06-10 1971-03-26 Edilmac Spa

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080068A (en) * 1960-12-15 1963-03-05 Alphie O Felkner Sectional boom for cranes
US3511388A (en) * 1967-09-18 1970-05-12 Manitowoc Co Pin connection for elongate load supporting boom structure
FR2049423A5 (en) * 1969-06-10 1971-03-26 Edilmac Spa

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103601083A (en) * 2013-11-26 2014-02-26 中联重科股份有限公司 Arm spike knot and tower crane comprising same
CN103601083B (en) * 2013-11-26 2016-02-03 中联重科股份有限公司 Arm spike knot and comprise the tower crane of this arm spike knot

Also Published As

Publication number Publication date
ES2069320T3 (en) 1995-05-01
DE59200821D1 (en) 1995-01-12
DE4101291A1 (en) 1992-07-23
EP0503227B1 (en) 1994-11-30
ATE114608T1 (en) 1994-12-15

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