EP0536060B1 - Flèche à repliage automatisé pour grue - Google Patents

Flèche à repliage automatisé pour grue Download PDF

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Publication number
EP0536060B1
EP0536060B1 EP92420330A EP92420330A EP0536060B1 EP 0536060 B1 EP0536060 B1 EP 0536060B1 EP 92420330 A EP92420330 A EP 92420330A EP 92420330 A EP92420330 A EP 92420330A EP 0536060 B1 EP0536060 B1 EP 0536060B1
Authority
EP
European Patent Office
Prior art keywords
jib
folding
section
articulation
base
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
EP92420330A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0536060A1 (fr
Inventor
François Aquino
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
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Filing date
Publication date
Application filed by Potain SA filed Critical Potain SA
Publication of EP0536060A1 publication Critical patent/EP0536060A1/fr
Application granted granted Critical
Publication of EP0536060B1 publication Critical patent/EP0536060B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • 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
    • B66C23/18—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 specially adapted for use in particular purposes
    • B66C23/26—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 specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes

Definitions

  • the present invention relates to the field of self-erecting cranes, in particular tower cranes used on building construction sites and public works, cranes which must be folded frequently for their transport on the road from one site to another, or from one location to another, in the best possible conditions of speed and security, without manual intervention. More specifically, this invention relates to an automatically folding boom for this type of crane, and more particularly still it relates to a device for folding / unfolding a boom made of several elements, which makes it possible to pass from a working position, with the jib elements aligned, in a folded position for transporting the crane as a whole, and vice versa from the folded transport position in the working position.
  • the boom comprises two elements, respectively an arrow foot articulated at the head of a telescopic mast and an arrow point articulated at the front end of the boom foot, while a cable of constant length connects a fixed point of the head of the mast to a fixed point of the arrowhead, so that during the telescoping of the mast the arrow passes from a folded position to the aligned working position and vice versa.
  • This boom folding device requires that the crane is also equipped with a set of punches and tie rods used to raise the boom when the mast is telescoped.
  • the cable of constant length and the set of punches and tie rods must be adjusted periodically, in particular to compensate for the permanent elongation of the cables which changes over time.
  • the boom articulated at the top of a mast is made of two or more elements articulated to each other, and a rod coupling system, arranged at each articulation and controlled by a tie rod connecting a member of said coupling system to a fixed point on the top of the mast or of a jib element, ensures the unfolding or folding of the jib during the telescoping of the mast in the case the latter is telescopic, or independently during boom lifting.
  • this device makes it possible to obtain and maintain good accuracy over time; nevertheless it presents some constraints which limit its good use to cranes with telescopic mast, because when the mast is not telescopic the control of the lifting of the boom is carried out by carrying out a hauling between the rear retaining cable and the rotating chassis of the crane and by controlling hauling by a mounting winch, which complicates the realization and affects the accuracy of the assembly.
  • the boom articulated at the top of a mast is produced by at least two boom elements interconnected in an articulated manner by means of a boom folding section.
  • the folding section has the function of laterally folding the second part of the boom against the first part, when the latter is itself folded against the mast of the crane for transport.
  • the folding section of this known embodiment is therefore not intended to fold and unfold the boom in a vertical plane.
  • the present invention provides an embodiment of a collapsible crane jib, of the type comprising an intermediate folding section, which aims to ensure the folding and unfolding of the jib in the vertical plane only, independently of the other stages of mounting the crane and avoiding the various drawbacks set out above.
  • a crane boom comprises in known manner at least two main boom elements, including a boom foot and a boom tip, of relatively great length and at least one intermediate boom folding element, relatively short in length, interposed between two main jib elements, all the jib elements being hinged to each other around substantially horizontal axes at their lower members;
  • this crane boom is essentially characterized in that the or each intermediate boom folding element is connected to a main boom element adjacent by a motorized member controlling the pivoting of this intermediate element around its axis of articulation with said main element, while the other main adjacent jib element is connected to the previous main element by a coupling assembly with at least three articulated members, the or one central member of which is also connected by articulation to a fixed point of the intermediate boom folding element, thus causing this other main boom element to pivot about its axis of articulation with the intermediate element.
  • the intermediate arrow folding element is connected to the arrowhead by the aforementioned motorized member, while the coupling assembly, with three articulated members, connects the arrowhead to the boom, the central element of this assembly also being connected by articulation to a fixed point of the intermediate boom folding element.
  • a motorized member directly controls the pivoting of the intermediate jib element relative to the jib foot, and the coupling assembly causes, simultaneously and as a consequence of the preceding movement, the pivoting of the jib tip relative to the intermediate element, so that in total the complete folding of the boom is obtained, the arrowhead being folded over the boom foot.
  • the motorized member connecting the intermediate boom folding element to the boom foot is a double-acting hydraulic cylinder, the body of which is articulated at the end of the upper chord of the boom foot and the rod of which is articulated at the top of the intermediate boom folding element, or vice versa.
  • the intermediate boom folding element comprises two vertically offset vertices and connected by a double lateral triangulation to the lower members of said element, the first vertex, of height substantially greater than that of the other vertex, receiving the end of the rod or of the body of the jack, and the second vertex receiving the articulation of the central member of the coupling assembly connecting the arrowhead to the arrowhead.
  • the boom foot comprises at its front end a double support, formed of two parts symmetrical with respect to the longitudinal median plane of the boom, of height substantially equal to that of the boom and the top of which carries an axis d articulation of one end of the first member of the coupling assembly.
  • the coupling assembly with three articulated members comprises a first single or multiple connecting rod, connecting the hinge pin carried by the aforementioned double support, disposed on the jib foot, to a hinge pin disposed at a first end of the central member, a bent lever with two branches forming said central member, the elbow receives the articulation on the second vertex of the intermediate boom folding element, and a second single or multiple connecting rod connecting an articulation axis disposed at the other end of the central member to a fixed articulation disposed at the rear end of the upper chord of the arrowhead.
  • this device is designed in such a way that, when the cylinder rod is retracted, the arrow tip is fully folded down on the boom foot, these two elements being then substantially parallel, and when the rod of the jack is fully extended, an alignment of the jib foot, of the intermediate element and of the jib tip is obtained, in particular to form a horizontal distributing jib, that is to say -to say a crane boom along which a load distribution carriage can move, rolling on the lower members of the three aligned boom elements.
  • the boom folding device allows, during the folding of the boom, the recovery of the "slack" of the lifting cable and the distribution cable, whatever or the position of the arrowhead relative to the arrowhead.
  • a crane jib is thus produced, the folding and unfolding of which are carried out automatically and independently of the assembly phase of the crane on which the jib is mounted, and which can be fitted to any type of crane.
  • the tower crane shown schematically in Figure 1 comprises, in known manner, a fixed or rolling base frame 1 supporting, by means of an orientation device 2, a rotating frame 3 which carries at the rear a counterweight 4 and at the front of which is articulated, around a horizontal axis 5, a foldable mast 6 composed of a base mast 7 and an upper mast 8 connected to one another by articulation on their rear face about a horizontal axis 9.
  • This crane is provided with a distributing jib 10, foldable according to the invention, produced here in three successive elements designated respectively as jib foot 11, intermediate jib folding element 12 and tip jib 13, interconnected by joints 14,15 around horizontal axes arranged at their lower members (the concept of "lower” member being defined by reference to the arrow in the horizontal working position).
  • the upper mast 8 is connected to the rotating frame 3 by means of two straightening stays 16 arranged symmetrically on either side of the mast 6 and articulated respectively around a horizontal axis 17 located at the base of the upper mast 8 and around a horizontal axis 18 disposed at the rear part of the rotating chassis 3.
  • the boom 10 is articulated at the top of the mast 6 about a horizontal axis 19 and is held in position by a tie rod 20 connecting a fixed point 21 of the upper chord 22 of the boom foot 11 to the top 23 of a rigid punch 24 inclined towards the rear of the crane and articulated at the base of the jib foot 11 about a horizontal axis 25, said punch 24 being itself held in position by a rear retaining tie rod 26 connecting the top 23 of this punch rigid 24 at a fixed point 27 arranged at the rear part of the rotating chassis 3.
  • the boom 10 of triangular current section comprises a upper chord 22,28 respectively for the jib foot 11 and the jib tip 13, two lower chords 29,30,31, respectively for the jib foot 11, the intermediate jib folding member 12 and the jib tip 13, forming the base of the triangular section, and a set of triangulation bars 32 connecting the upper chord 22,28 and the lower members 29, 30, 31 therebetween to form a rigid triangular section.
  • the intermediate jib folding element 12 of relatively short length, compared to those of the jib foot 11 and the jib tip 13, comprises two vertically offset vertices 33, 34, joined to the lower members 30 by bars triangulation 35 and also substantially offset in height.
  • the highest vertex 33, located opposite the arrowhead 11, is arranged in the median plane of the arrow 10, while the vertex 34 located opposite the arrowhead 13 is double and is arranged substantially at the plumb with the lower members 30 of said intermediate arrow folding element 12 and at the level of the upper member 28 of the arrow tip 13 when the elements of arrow 10 are aligned.
  • the boom folding device 10 comprises a double-acting hydraulic cylinder 36 whose body 37 is articulated at 38 at the end of the upper member 22 of the boom foot 11, and whose rod 39 is articulated at the top 33 of the boom folding element 12, and a coupling assembly 40 produced in two parts symmetrical with respect to the longitudinal median plane of the boom 10, each consisting of a bent lever 41 and two double connecting rods 42 , 43 connecting the arrowhead 13 to the arrowhead 11 via the arrow folding element 12.
  • the bent lever 41 has two branches 44,45, forming an obtuse angle oriented towards the inside of the arrow 10, and this lever 41 is articulated, at its elbow 46, at the top 34 of the intermediate boom folding element 12.
  • the first double connecting rod 42 joins by two articulations 47, 48, respectively, the upper part of a support 49 fixed the front end of the jib foot 11, and the free end of the rear branch 44 of the bent lever 41.
  • the support 49 is a double support, formed by two parts symmetrical with respect to the longitudinal median plane of the crane; the height of the double support 49 is substantially equal to that of the arrow 10.
  • the second double connecting rod 43 joins by two articulations 50, 51, respectively, the free end of the front branch 45 of the bent lever 41 and the rear end of the upper chord 28 of the arrowhead 13.
  • the jack 36 has its rod 39 protruding entirely from the body 37 and substantially aligned with the upper chord 28 of the arrow tip 13 and with the part of the coupling assembly 40 formed by the second connecting rod 43 and by the front branch 45 of the bent lever 41, such that in service the longitudinal forces of the upper part of the arrow 10 are transmitted without significant discontinuity from the arrow tip 13 to the arrow foot 11.
  • the rod 39 sinks into the body 37 of said cylinder 36 and the distance between the joints 33, 38 carried respectively by the intermediate boom folding element 13 and by the jib foot 11 is shortened.
  • the assembly made up of the two jib elements 12, 13 pivots around the articulation 14 of the jib 10.
  • the distance between the articulations 47, 51 carried respectively by the jib foot 11 and by the arrowhead 13 also shortens, causing the bent lever 41 to rotate around the articulation 34 of the intermediate arrow folding element 12 and consequently the pivoting of the arrowhead 13 around the articulation 15 of arrow 10.
  • the arrow tip 13 is inverted and occupies a position substantially parallel to the boom foot 11, while the intermediate arrow folding element 12 is tilted and occupies a position substantially perpendicular to the jib foot 11.
  • the intermediate jib folding element 12 in order to obtain a minimum folded height for transporting the crane, the intermediate jib folding element 12 must have a length substantially equal to the sum of the heights of the jib foot 11 and of the arrowhead 13.
  • the actuator of the jack 36 can be controlled independently other mounting movements of the crane, the folding of the jib 10 can be carried out in any position of the jib 10 and of the crane equipped with this jib.
EP92420330A 1991-10-02 1992-09-25 Flèche à repliage automatisé pour grue Expired - Lifetime EP0536060B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112383 1991-10-02
FR9112383A FR2682097A1 (fr) 1991-10-02 1991-10-02 Fleche a repliage automatise pour grue.

Publications (2)

Publication Number Publication Date
EP0536060A1 EP0536060A1 (fr) 1993-04-07
EP0536060B1 true EP0536060B1 (fr) 1994-07-06

Family

ID=9417712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420330A Expired - Lifetime EP0536060B1 (fr) 1991-10-02 1992-09-25 Flèche à repliage automatisé pour grue

Country Status (9)

Country Link
EP (1) EP0536060B1 (ja)
JP (1) JP2793932B2 (ja)
CN (1) CN1031457C (ja)
AT (1) ATE108166T1 (ja)
CZ (1) CZ300292A3 (ja)
DE (1) DE69200225T2 (ja)
ES (1) ES2056007T3 (ja)
FR (1) FR2682097A1 (ja)
RU (1) RU2083473C1 (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2732000B1 (fr) * 1995-03-22 1997-05-30 Potain Sa Grue a montage automatise avec fleche repliable sur elle-meme
DE69727719T2 (de) * 1996-03-04 2005-01-13 Manitowoc Crane Companies, Inc., Reno Aushängbare Verbindung zum Falten eines Wippauslegers
FR2765564B1 (fr) * 1997-07-02 1999-08-27 Potain Sa Mature pliable en trois elements avec dispositif de pliage/depliage pour grue a tour
EP0941958A1 (en) * 1998-03-11 1999-09-15 Gru Dalbe S.r.l. A system for reducing the overall aerial dimensions of the jib in a foldable jib crane
EP0999171A1 (en) * 1998-11-05 2000-05-10 Gru Dalbe S.r.l. A foldable jib of a tower crane
FR2790252B1 (fr) * 1999-02-26 2001-04-06 Potain Sa Dispositif de depliage ou repliage simultane d'elements de pointe de fleche de grue
FR2792627B1 (fr) 1999-04-23 2001-06-01 Potain Sa Grue avec fleche a fonctions multiples
ITMI20010116A1 (it) * 2001-01-23 2002-07-23 San Marco Internat S R L Gru a torre a struttura composita automontante con torre ripiegabile e sfilabile e braccio a piu' porzioni
FR2941444B1 (fr) * 2009-01-29 2011-02-11 Manitowoc Crane Group France Fleche de grue a tour distributrice avec dispositif de repliage
CN102320526B (zh) * 2011-09-14 2013-02-13 哈尔滨东建机械制造有限公司 一种自装卸可折叠塔式起重机
DE102014013734A1 (de) * 2014-09-22 2016-03-24 Schwing Gmbh Knickmast
DE102014013736A1 (de) * 2014-09-22 2016-03-24 Schwing Gmbh Mastarm mit Hebelgetriebe
CN105366560B (zh) * 2015-11-02 2017-08-08 武汉船用机械有限责任公司 一种船舶吊机的吊臂组件及船舶吊机
DE102016009038B4 (de) * 2016-07-25 2018-02-08 Liebherr-Werk Ehingen Gmbh Klappspitzen-Anlenkstück und Verfahren zum Montieren einer Klappspitze
CN106966343B (zh) * 2017-05-22 2022-07-08 达思泰克(大连)船舶科技有限公司 用于船舶建造的举高作业机构以及多联举高作业机构
CN107720572A (zh) * 2017-11-17 2018-02-23 长沙理工大学 一种卷扬机自动控制的三节折叠输送机
DE102018115519B3 (de) * 2018-06-27 2019-09-12 Terex Global Gmbh Fahrzeugkran mit einem beweglichen Adapter zwischen Hauptausleger und Hauptauslegerverlängerung
CN109516392B (zh) * 2018-12-03 2020-01-24 徐州徐工液压件有限公司 一种自安装式三缸组合多级变幅装置
DE102019104142B9 (de) * 2019-02-19 2020-11-19 Liebherr-Werk Ehingen Gmbh Klappbare Schwebeballastführung für einen Kran
CN110001918A (zh) * 2019-03-21 2019-07-12 广东工业大学 一种无人机机臂自动折叠装置
CN114955894B (zh) * 2022-06-13 2023-05-16 中建三局集团有限公司 一种顶加节自升降式折叠塔机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368430A1 (fr) * 1976-10-22 1978-05-19 Pingon Manubat Sa Fleche repliable pour grues telescopiques
FR2550176B1 (fr) * 1983-08-03 1985-10-11 Potain Sa Grue a fleche depliable en plusieurs elements articules
DE8433323U1 (ja) * 1984-11-14 1988-06-30 Peiner Hebe- Und Transportsysteme Gmbh, 5500 Trier, De

Also Published As

Publication number Publication date
FR2682097A1 (fr) 1993-04-09
RU2083473C1 (ru) 1997-07-10
CZ300292A3 (en) 1993-04-14
DE69200225T2 (de) 1994-10-27
CN1031457C (zh) 1996-04-03
FR2682097B1 (ja) 1995-06-02
ATE108166T1 (de) 1994-07-15
DE69200225D1 (de) 1994-08-11
JP2793932B2 (ja) 1998-09-03
CN1085521A (zh) 1994-04-20
EP0536060A1 (fr) 1993-04-07
JPH05213583A (ja) 1993-08-24
ES2056007T3 (es) 1994-09-01

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