EP0503227B1 - Flèche démontable en sections pour une grue à tour - Google Patents

Flèche démontable en sections pour une grue à tour Download PDF

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Publication number
EP0503227B1
EP0503227B1 EP92100529A EP92100529A EP0503227B1 EP 0503227 B1 EP0503227 B1 EP 0503227B1 EP 92100529 A EP92100529 A EP 92100529A EP 92100529 A EP92100529 A EP 92100529A EP 0503227 B1 EP0503227 B1 EP 0503227B1
Authority
EP
European Patent Office
Prior art keywords
jib
boom
coding
locating elements
sections
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 - Lifetime
Application number
EP92100529A
Other languages
German (de)
English (en)
Other versions
EP0503227A1 (fr
Inventor
Heinz Ehmann
Ewald Kloos
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.)
MAN GHH Logistics GmbH
Original Assignee
MAN GHH Logistics 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 MAN GHH Logistics GmbH filed Critical MAN GHH Logistics GmbH
Publication of EP0503227A1 publication Critical patent/EP0503227A1/fr
Application granted granted Critical
Publication of EP0503227B1 publication Critical patent/EP0503227B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 collapsible 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 are very similar, even though the cross-sections of the bars, 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 determined, 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 assembled from a set of existing boom segments using the modular principle. Since predetermined installation locations of the individual jib 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 a connection of each cantilever element only in a predetermined local position relative to the other cantilever segments, the pairs of fitting elements in the event of a deviation from the 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 structures 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 cross bolts or the like.
  • 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 and the dimensions of the frame construction, in particular the rod cross sections, differ only slightly from 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 boom segments 5 assigned to one another in accordance with the crane construction can be inserted so far into one another 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 boom segments not merged, the the sleeves 9-bearing end face is drawn in front view and the end carrying the pin 11 in plan view.
  • Fig. 3 shows the situation with the clutch closed and inserted, the pin 11 locking the pin 9 in the sleeve 9.
  • the fitting pin 17 penetrates the fitting hole 15. If an attempt is made to couple non-matching cantilever segments, the pin 17 abuts the crossbar 13 of the adjacent boom segment, and the bolt 19 can not be inserted.
  • the crossbeams 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Claims (4)

  1. Flèche démontable d'une grue à pylône, en particulier d'une grue de chantier, comportant plusieurs segments (5) reliés entre eux de manière amovible, placés les uns derrière les autres dans la direction longitudinale de la flèche, caractérisée en ce qu'à des extrémités voisines deux par deux de la longueur des segments (5) de la flèche, il est prévu des paires d'éléments ajustés de codage (15, 17) complémentaires entre eux, qui autorisent un assemblage de chaque élément (5) de la flèche exclusivement dans une position de montage locale prédéterminée par rapport aux autres segments (5), les paires d'éléments ajustés (15, 17) maintenant écartés entre eux les éléments (5) correspondants de la flèche, en cas d'écart par rapport à la position de montage prédéterminée, cet écartement empêchant l'assemblage des segments (5) de la flèche.
  2. Flèche selon la revendication 1, caractérisée en ce que la forme de tous les éléments ajustés de codage (15, 17) est la même et leur codage est défini par la position dans laquelle les éléments ajustés (15, 17) sont placés aux extrémités frontales.
  3. Flèche selon la revendication 1 ou 2, caractérisée en ce que les segments (5) de la flèche présentent une structure à portiques, dont chacun comporte à ses extrémités longitudinales (7) une traverse (13) qui fait face à la traverse (13) du segment (5) voisin, et en ce que les éléments ajustés (15, 17) sont prévus sur les traverses (13) dans une position définissant le codage.
  4. Flèche selon l'une des revendications 1 à 3, caractérisée en ce que les éléments ajustés de codage associés deux par deux sont réalisés sous la forme d'éléments ajustés à trou et axe à insérer dans la direction longitudinale de la flèche.
EP92100529A 1991-01-17 1992-01-14 Flèche démontable en sections pour une grue à tour Expired - Lifetime EP0503227B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4101291 1991-01-17
DE4101291A DE4101291A1 (de) 1991-01-17 1991-01-17 Zerlegbarer ausleger fuer einen turmkran

Publications (2)

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

Family

ID=6423214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100529A Expired - Lifetime EP0503227B1 (fr) 1991-01-17 1992-01-14 Flèche démontable en sections pour une grue à tour

Country Status (4)

Country Link
EP (1) EP0503227B1 (fr)
AT (1) ATE114608T1 (fr)
DE (2) DE4101291A1 (fr)
ES (1) ES2069320T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA116793A (de) * 1993-06-16 1998-07-15 Boesch Berndt Baustellenkran
DE4339564C2 (de) * 1993-11-19 1996-03-28 Movietech Filmgeraete Gmbh Ausleger für Kamerawagen, -kran oder dergleichen
DE202005008602U1 (de) * 2005-06-02 2006-10-19 Liebherr-Werk Biberach Gmbh Ausleger
CN103601083B (zh) * 2013-11-26 2016-02-03 中联重科股份有限公司 臂尖节以及包括该臂尖节的塔式起重机

Family Cites Families (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 (fr) * 1969-06-10 1971-03-26 Edilmac Spa

Also Published As

Publication number Publication date
DE59200821D1 (de) 1995-01-12
ATE114608T1 (de) 1994-12-15
DE4101291A1 (de) 1992-07-23
EP0503227A1 (fr) 1992-09-16
ES2069320T3 (es) 1995-05-01

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