EP1728756A1 - Flèche - Google Patents

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Publication number
EP1728756A1
EP1728756A1 EP06009560A EP06009560A EP1728756A1 EP 1728756 A1 EP1728756 A1 EP 1728756A1 EP 06009560 A EP06009560 A EP 06009560A EP 06009560 A EP06009560 A EP 06009560A EP 1728756 A1 EP1728756 A1 EP 1728756A1
Authority
EP
European Patent Office
Prior art keywords
pin
recess
boom
longitudinal axis
boom according
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.)
Granted
Application number
EP06009560A
Other languages
German (de)
English (en)
Other versions
EP1728756B1 (fr
Inventor
Manfred Mielich
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 Biberach GmbH
Original Assignee
Liebherr Werk Biberach GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Liebherr Werk Biberach GmbH filed Critical Liebherr Werk Biberach GmbH
Publication of EP1728756A1 publication Critical patent/EP1728756A1/fr
Application granted granted Critical
Publication of EP1728756B1 publication Critical patent/EP1728756B1/fr
Active 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

Definitions

  • the present invention relates to a jib of a crane, in particular of a tower crane, wherein the jib comprises at least two jib parts which are connected to one another by means of a connecting device and which have at least one lower chord and / or at least one upper chord.
  • Booms often consist of individual boom parts, which are to be connected in a suitable manner before commissioning.
  • the jib parts usually have a top flange and two bottom straps, wherein the upper and lower straps of two adjacent jib parts are connected to each other by means of identical or different joining techniques.
  • the lower straps have on their front side plates which extend transversely to the boom longitudinal axis.
  • the plates have bores through which a connecting element extends in the form of a bolt, which is fixed by means of a secured wedge.
  • the holes and the bolt do not extend on the front sides of the lower flange, but offset to the end of said plates.
  • a centering pin provided as an assembly aid, which engages in a aligned with this bore in the end face of the adjacent lower flange.
  • connection device for boom parts
  • the connecting device can not absorb the forces where they are introduced due to their staggered arrangement. Furthermore, moments may occur, which is undesirable.
  • Another disadvantage is the relatively complex structure of prior art connecting devices to call.
  • the connecting device consists of a pin, a receiving this recess and a fixing element which fixes the jib parts together.
  • the fixing element holds the pin in the recess.
  • the pin extends from the front side of the lower or upper flange of a jib part.
  • the recess is located in the front side of the lower or upper flange of the associated boom member.
  • the connecting device is thus located in the front side of the lower or upper belt and not offset to this, as is known from the prior art. This results in the advantage that the connection between the jib parts exists where forces are introduced. The occurrence of unwanted moments can be prevented.
  • the fixing element has a bolt and a bore in the pin and a bore in the recess having the cantilever part, wherein the bolt is received in both bores is particularly advantageous.
  • the bolt is through the hole in the pin and through the hole in which the Recessed having lower or upper flange of the other boom part out and holds in this way the pin in the recess.
  • the connecting device can be located exclusively on the lower chords of the jib parts. It is also conceivable that even or only the one or more upper straps are connected to each other by means of the connecting device according to the invention. It is also conceivable that for the not connected to the connecting device according to the invention upper or lower chords an alternative connection technique is selected.
  • the pin and the recess extends the longitudinal axis of the pin and the recess parallel to the longitudinal axis of the lower and / or the upper flange.
  • the longitudinal axis of the pin and the recess can be aligned with the longitudinal axis of the lower and / or upper flange or arranged offset to this.
  • the pin and the recess can thus be arranged centrally in the end face or offset relative to the front side center.
  • the holes in the pin and in the recess having the boom part in a transversely to the longitudinal axis of the lower and / or the upper flange extending plane.
  • a securing element may be provided, which is received in a bore extending transversely to the longitudinal axis of the bolt.
  • the distance between the pin and the recess to one, several or all outer sides of the lower and upper flange may be identical.
  • jib parts can be connected whose front-side cross-sectional areas are identical. It can be provided be that the outer surfaces of the interconnected jib parts are aligned.
  • FIG.1 upper view shows the end portions of the lower chords 10, 20 of two adjacent, to be joined together jib parts of a jib of a crane, for example a tower crane.
  • the lower chords 10, 20 are executed as hollow sections except for their end sections.
  • the lower chords 10, 20 have a square or rectangular cross-sectional area.
  • Perpendicular to the end face of the lower flange 20 extends from the lower flange 20 of the pin 22. This is cylindrical and has in its tip end forming a tapered portion on. Transverse to the longitudinal axis of the pin 22 is the through hole 30th
  • the depth of the recess 12 corresponds to or exceeds the length of the pin 22. At the level of the recess 12 is transverse to the longitudinal axis of the recess 12th extending through hole 30, which has from the front side of the lower flange 10 at such a distance that it is aligned with the bore 30 of the pin when the end faces of the lower chords 10, 20 abut each other.
  • the bolt 40 After insertion of the pin 22 in the recess 12 of the bolt 40 is inserted into the bores 30.
  • the bolt 40 has in its end portion a transverse to the longitudinal axis of bore through which after insertion of the bolt 40 which is designed as a wire clip securing element 50 is inserted. This prevents falling out of the bolt 40 from the bore 30th
  • the pin 22 and the recess 12 may be arranged centrally or offset from the center in the respective end faces.
  • the distance of the pin 22 and the recess 12 from the outer surfaces 14, 24 of the lower chords 10, 20 is identical.
  • the invention also allows the connection of different lower / upper straps, as shown in Fig. 1, bottom view.
  • the lower flange 60 shown on the right has a smaller cross-sectional area than the lower flange 10 connected thereto.
  • the surfaces of the lower straps 10, 60 are aligned with each other on two sides. On the other two sides there are stepped transitions.
  • FIG. 2 again shows the arrangement according to FIG. 1, upper illustration, so that reference is made in this respect.
  • the lower chords 10, 20 are substantially hollow and made compact in their end portions. This applies both to the portion of the lower flange 10, in which the recess 12 is located as well as for the end portion of the lower flange 20, which carries the pin 22.
  • the compact end sections can be formed by subsequently attached to the end faces of the lower / upper straps connecting elements. These can be welded, for example.
EP06009560.1A 2005-06-02 2006-05-09 Flèche Active EP1728756B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202005008602U DE202005008602U1 (de) 2005-06-02 2005-06-02 Ausleger

Publications (2)

Publication Number Publication Date
EP1728756A1 true EP1728756A1 (fr) 2006-12-06
EP1728756B1 EP1728756B1 (fr) 2014-04-30

Family

ID=37018031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06009560.1A Active EP1728756B1 (fr) 2005-06-02 2006-05-09 Flèche

Country Status (3)

Country Link
EP (1) EP1728756B1 (fr)
DE (1) DE202005008602U1 (fr)
ES (1) ES2464591T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024003167A1 (fr) 2022-06-30 2024-01-04 Wolffkran Holding Ag Dispositif de liaison pour relier des segments de flèche de la flèche d'une grue à tour
DE102022116387A1 (de) 2022-06-30 2024-01-04 Wolffkran Holding Ag Verbindungsvorrichtung zur verbindung von auslegersegmenten eines auslegers eines turmdrehkrans

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511388A (en) * 1967-09-18 1970-05-12 Manitowoc Co Pin connection for elongate load supporting boom structure
NL7100830A (fr) * 1966-12-19 1971-05-25
EP1016617A1 (fr) * 1991-07-25 2000-07-05 Manitowoc Crane Group, Inc. Dispositif de connexion rapide pour éléments de flèches de grues et analogues
EP1468955A1 (fr) 2003-04-17 2004-10-20 Potain Dispositif d'assemblage démontable des éléments de flèche d'une grue à tour

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1096242A (en) * 1964-12-02 1967-12-20 British Hoist And Crane Compan Sectional towers for hoists
DE3842726C3 (de) * 1988-12-19 2001-01-18 Mannesmann Ag Mehrschnittige Bolzenverbindung
DE4101291A1 (de) * 1991-01-17 1992-07-23 Man Ghh Logistics Zerlegbarer ausleger fuer einen turmkran

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7100830A (fr) * 1966-12-19 1971-05-25
US3511388A (en) * 1967-09-18 1970-05-12 Manitowoc Co Pin connection for elongate load supporting boom structure
EP1016617A1 (fr) * 1991-07-25 2000-07-05 Manitowoc Crane Group, Inc. Dispositif de connexion rapide pour éléments de flèches de grues et analogues
EP1468955A1 (fr) 2003-04-17 2004-10-20 Potain Dispositif d'assemblage démontable des éléments de flèche d'une grue à tour

Also Published As

Publication number Publication date
DE202005008602U1 (de) 2006-10-19
EP1728756B1 (fr) 2014-04-30
ES2464591T3 (es) 2014-06-03

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