EP1354841B1 - Triangulation d'une poutre en treillis, notamment d'un élément de flèche pour grue à tour - Google Patents

Triangulation d'une poutre en treillis, notamment d'un élément de flèche pour grue à tour Download PDF

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Publication number
EP1354841B1
EP1354841B1 EP03356047A EP03356047A EP1354841B1 EP 1354841 B1 EP1354841 B1 EP 1354841B1 EP 03356047 A EP03356047 A EP 03356047A EP 03356047 A EP03356047 A EP 03356047A EP 1354841 B1 EP1354841 B1 EP 1354841B1
Authority
EP
European Patent Office
Prior art keywords
bars
triangulation
chord
compression
flattened
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
EP03356047A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1354841A1 (fr
Inventor
Michel Lissandre
Jean-Pierre Gautier
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.)
Manitowoc Crane Group France SAS
Original Assignee
Potain SA
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 Potain SA filed Critical Potain SA
Publication of EP1354841A1 publication Critical patent/EP1354841A1/fr
Application granted granted Critical
Publication of EP1354841B1 publication Critical patent/EP1354841B1/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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • E04C2003/0495—Truss like structures composed of separate truss elements the truss elements being located in several non-parallel surfaces

Definitions

  • the present invention relates to a trellis beam triangulation, in particular a cantilever beam. More particularly, this invention relates to the triangulation of a lattice boom member, or a lattice counter-boom member, of a tower crane.
  • a tower crane boom along which an arrow carriage usually moves, is constituted by a succession of boom elements, aligned and assembled to each other so as to constitute an arrow having the desired length.
  • Each boom element is a structure of the kind lattice girder, triangular section, rectangular or trapezoidal, which comprises ribs defining two by two plane faces. In each of these planar faces, the two chords are interconnected by elongated bar-like pieces which together form what is called a "triangulation".
  • This type of structure is also applied to the counter-arrows tower cranes, which support a counterweight balancing the boom and possibly the load raised.
  • This type of lattice girder has the particularity, as regards its lateral faces, of having an upper chord always taut, and a lower chord always compressed, when the beam is in work.
  • FIG. 1 of the attached schematic drawing which shows, in perspective, an arrow element section.
  • an arrow element of triangular section its single upper chord is indicated in 2, while its two lower chords are indicated in 3.
  • the lower horizontal face of the boom element has a different structure, with crosspieces 8, 9, 10 and alternating diagonal bars 11, 12.
  • the lengths of the bars 4 and 5 must be as small as possible, to avoid buckling due to compression.
  • the lengths of the other bars 6 and 7 may be larger.
  • the present invention aims to eliminate these disadvantages, thus to optimize the construction of a lattice beam element, more particularly of an element of boom or counter-boom for tower crane, by reducing the number of parts constituting the element, thereby reducing the weight of this element, and also reducing its wind-resistant side surface, thus reducing its manufacturing cost and the operating cost of the crane.
  • the triangulation object of the invention is thus characterized by the combination of compression bars spaced apart, therefore fewer, and “diagonals” of two kinds, some shorter and the other longer.
  • this structure is characterized by particular assembly nodes at the upper chord, each of these nodes being, overall, the convergence point of a compression bar, a "short" slash and a long slash.
  • the compression bars ensure the recovery of main efforts.
  • the "long" oblique pull rods also have a main effort recovery function. As for the “short” oblique pull rods, these have particular functions of taking up the vertical forces due to the passage of the carriage and counter-buckling of the lower chord.
  • the respective neutral fibers of the compression rods, and oblique tensile rods of greater length are concurrent with one another at points situated in a horizontal plane containing the neutral fiber of the chord higher.
  • FIG. 1 recalls the principle of a known triangulation, on a section of a boom element of a tower crane.
  • FIG. 2 shows the complete boom element, designated by 13, made with this triangulation which is repeated according to the pitch P, over the entire length of the boom element 13. Being a side view, this figure 2 shows more particularly the lateral triangulation of the boom member 13, with its substantially vertical bars and slashes.
  • FIG. 3 shows an arrow element 13 made, as regards its two lateral faces, with a triangulation according to the invention, also represented in perspective (for a section of this arrow element) in FIG. 4.
  • the lateral triangulation comprises substantially vertical compression rods 14, which each connect a point 15 of the upper chord to a point 16 of the lower chord 3.
  • the compression rods 14 follow each other at a regular interval 2 P, equal to twice the not predefined P.
  • the lateral triangulation also comprises oblique traction bars 17, which each connect the top 15 of a compression bar 14 to a point 18 of the lower chord 3, the point 18 being at a pitch P in front of the base 16 of this same compression bar 14.
  • the triangulation comprises other traction rods 19, oblique, and of greater length than the previous ones.
  • Each drawbar 19 connects the top 15 of a compression bar 14 to a point 20 of the lower chord 3 located at two steps P in front of the base 16 of the same compression bar 14, so at the level of the base of the next compression bar 14.
  • each compression bar 14 constitutes an upper assembly node, where a compression bar 14 converges (for a lateral face of the boom member 13), oblique traction 17 of smaller length and an oblique tensile bar 19 of greater length, and where these three bars 14, 17, 19 are also connected, directly or indirectly, to the upper chord 2.
  • the different kinds of bars 14, 17 and 19 are all constituted by tubes of circular section, whose ends are flattened and cut in a suitable contour, to achieve the assembly nodes.
  • the upper ends of the compression rods 14, the oblique tensile rods 17 of smaller length, and the oblique tensile rods 19 of greater length are flattened and cut ends designated respectively by 21, 22 and 23, adapted for producing the upper assembly nodes 15.
  • each compression bar 14 which has a generally rectangular or parallelogram shape, has in particular an upper edge 24 rectilinear and parallel to the longitudinal axis A of the upper chord 2, here tubular. This edge 24 is welded to the upper chord 2, along a generatrix of this chord 2.
  • each longer oblique tensile bar 19 has a generally pentagonal shape, and in particular has a rectilinear upper edge 25 and a rectilinear posterior edge 26.
  • the upper edge 25, parallel to the longitudinal axis A of the upper chord 2, is welded to this chord 2, along a generatrix thereof, in the extension of the weld seam of the upper edge 24 of the flattened upper end of the compression bar 14.
  • the rear edge 26, substantially vertical, is placed against the anterior ridge 27 the upper flattened end 21 of the compression bar 14. The two adjacent edges 26 and 27 are welded to one another.
  • each obliquely oblong traction bar 17 which has a generally rectangular shape, is applied externally against the flattened upper ends 21 and 23 adjacent to a compression bar 14 and a bar.
  • oblique traction 19 of greater length, so as to overlap these two flattened ends 21 and 23.
  • the perimeter 28 of the flattened upper end 22 of the oblique traction rod 17 is welded to the flattened ends 21 and 23 of the other bars 14 and 19.
  • each side face of the boom member 13 the neutral fiber 29 of a compression bar 14, and the neutral fiber 30 of the oblique traction rod 19 of greater length associated with it .
  • the two neutral fibers 29 and 30 are concurrent with each other at a point 31 situated in a horizontal plane P1 which contains the neutral fiber of the upper chord 2, here merged with the longitudinal axis A of this upper chord 2.
  • the respective neutral fibers 29, 30 of the compression rods 14, and oblique traction rods 19 of greater length are all concurrent with each other. at points 33 situated in the vertical plane P2 containing the neutral fiber (axis A) of the upper chord 2.
  • the respective neutral fibers 32 of the oblique traction bars 17 of smaller length, belonging to the two lateral faces of the deflection element 13 are concurrent at points located in the vertical plane P2 containing the neutral fiber (axis A) of the upper chord 2.
  • the lateral triangulation constitutes an advantageous solution in terms of lightening, in particular for relatively high deflection elements, for example for boom elements of height greater than about a meter.
  • the lateral triangulation object of the invention is particularly applicable to the realization of the boom of a tower crane without masthead, this does not exclude its application to tower cranes with head of boom-boom mast, in particular for the cantilevered parts of the boom arrows with boom holders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)
EP03356047A 2002-04-16 2003-03-14 Triangulation d'une poutre en treillis, notamment d'un élément de flèche pour grue à tour Expired - Lifetime EP1354841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0204738 2002-04-16
FR0204738A FR2838416B1 (fr) 2002-04-16 2002-04-16 Triangulation d'une poutre en treillis, notamment d'un element de fleche pour grue a tour

Publications (2)

Publication Number Publication Date
EP1354841A1 EP1354841A1 (fr) 2003-10-22
EP1354841B1 true EP1354841B1 (fr) 2006-10-18

Family

ID=28459881

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03356047A Expired - Lifetime EP1354841B1 (fr) 2002-04-16 2003-03-14 Triangulation d'une poutre en treillis, notamment d'un élément de flèche pour grue à tour

Country Status (8)

Country Link
US (1) US6871469B2 (ko)
EP (1) EP1354841B1 (ko)
JP (1) JP4243510B2 (ko)
KR (1) KR100925808B1 (ko)
DE (1) DE60309091T2 (ko)
ES (1) ES2275073T3 (ko)
FR (1) FR2838416B1 (ko)
RU (1) RU2319658C2 (ko)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6749604B1 (en) * 1993-05-10 2004-06-15 Arthrocare Corporation Electrosurgical instrument with axially-spaced electrodes
US7086207B2 (en) * 2005-06-09 2006-08-08 Andrew Corporation Antenna sector frame
US8919586B2 (en) * 2008-04-25 2014-12-30 Itrec B.V. Hoisting crane with hybrid portions
JP5669464B2 (ja) * 2010-07-08 2015-02-12 株式会社神戸製鋼所 ラチスブーム
DE102012013001B4 (de) * 2012-06-28 2019-04-25 Liebherr-Werk Ehingen Gmbh Kranausleger und Kran
DE102013005052A1 (de) * 2013-03-22 2014-09-25 Liebherr-Werk Biberach Gmbh Kranausleger und Kran
RU2618771C1 (ru) * 2016-02-19 2017-05-11 Александр Суренович Марутян Несущая конструкция с решеткой из чечевидных труб

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US791975A (en) * 1904-12-29 1905-06-06 Archbold Brady Company Skeleton tower.
US1141967A (en) * 1913-08-11 1915-06-08 Camille Lacoste Metallic framework construction.
US1698849A (en) * 1927-06-16 1929-01-15 Glenn L Martin Co Airplane
US2019810A (en) * 1931-11-09 1935-11-05 Clyde C Deuel Frame construction system
US3021014A (en) * 1959-01-19 1962-02-13 Link Belt Speeder Corp Crane boom structure
US3330201A (en) * 1965-05-14 1967-07-11 Jr William J Mouton Continuous space frame dome
FR2049423A5 (ko) * 1969-06-10 1971-03-26 Edilmac Spa
FR2280754A1 (fr) * 1974-07-31 1976-02-27 Velut Jean Poutres triangulees precontraintes a noeuds glissants
US4173102A (en) * 1977-06-28 1979-11-06 Bernard Judge Building construction
SE419782B (sv) * 1980-02-04 1981-08-24 Prefament Ab Takstolssats for valmade tak och sett for framstellning derav
FR2556377B1 (fr) * 1983-12-07 1986-10-24 Bouygues Sa Treillis de pont, travee de pont comportant de tels treillis et procede pour construire la travee
IT1184769B (it) * 1985-04-24 1987-10-28 Luciano Romanelli Complesso di elementi strutturali ed accessori,standardizzati,per la realizzazione di strutture spaziali,fiane,componibili al fine di delimitare spazi abitabili,in un sistema costruttivo industrializzato
US4689932A (en) * 1985-11-06 1987-09-01 Zeigler Theodore Richard Portable shelter assemblies
USRE33710E (en) * 1985-11-06 1991-10-08 World Shelters, Inc. Portable shelter assemblies
US4722638A (en) 1987-01-22 1988-02-02 Morrison Donald R Screen with frontal distribution unit
JPH01214644A (ja) * 1987-10-26 1989-08-29 Osvaldo N Rodriguez 家屋用の４面体モジュール構造
US5505035A (en) * 1992-06-24 1996-04-09 Lalvani; Haresh Building systems with non-regular polyhedral nodes
US5487479A (en) * 1992-11-23 1996-01-30 The Manitowoc Company, Inc. Method for nesting longitudinally divisible crane boom segments
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FR2773550B1 (fr) * 1998-01-12 2000-02-18 Potain Sa Element de fleche pour grue a tour
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Also Published As

Publication number Publication date
KR20030082386A (ko) 2003-10-22
US6871469B2 (en) 2005-03-29
JP4243510B2 (ja) 2009-03-25
JP2003312988A (ja) 2003-11-06
DE60309091T2 (de) 2007-05-16
EP1354841A1 (fr) 2003-10-22
FR2838416A1 (fr) 2003-10-17
FR2838416B1 (fr) 2004-10-01
KR100925808B1 (ko) 2009-11-11
ES2275073T3 (es) 2007-06-01
DE60309091D1 (de) 2006-11-30
RU2319658C2 (ru) 2008-03-20
US20030226330A1 (en) 2003-12-11

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