EP0733584B1 - Automatic erection for a crane with a foldable boom - Google Patents

Automatic erection for a crane with a foldable boom Download PDF

Info

Publication number
EP0733584B1
EP0733584B1 EP96420064A EP96420064A EP0733584B1 EP 0733584 B1 EP0733584 B1 EP 0733584B1 EP 96420064 A EP96420064 A EP 96420064A EP 96420064 A EP96420064 A EP 96420064A EP 0733584 B1 EP0733584 B1 EP 0733584B1
Authority
EP
European Patent Office
Prior art keywords
jib
folding
articulation
main
shaft
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
EP96420064A
Other languages
German (de)
French (fr)
Other versions
EP0733584A1 (en
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
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 EP0733584A1 publication Critical patent/EP0733584A1/en
Application granted granted Critical
Publication of EP0733584B1 publication Critical patent/EP0733584B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B66C23/68—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
    • B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks

Definitions

  • the present invention relates to the field technique of self-erecting cranes, especially tower cranes used on construction sites of buildings and public works, cranes which must be folded up for transport on the road from a construction site to a other, or from one location to another, in the best possible conditions for speed, security and size, without manual intervention.
  • This invention is more particularly relative to a crane equipped with a boom composed of several successive elements, articulated together at the level of their lower members, the folding of which is carried out on itself and more precisely still an arrow composed of more than three elements with elements of relatively long main boom and shortest intermediate elements intended for facilitate the folding of the boom and minimize the size of the boom, once it is folded.
  • documents EP-A-0536060 and EP-A-0536061 describe an embodiment of a such a crane boom, in which the intermediate element of folding boom is connected to a main element of adjacent boom by a motorized member such as a jack hydraulic controlling the pivoting of this element intermediate around its axis of articulation audit main element, while the other main element of adjacent arrow is connected to the previous main element by a coupling assembly comprising at least three articulated organs, of which the or central organ is connected also by articulation at a fixed point of the element arrow folding intermediate, causing the pivoting of this other main arrow element around from its axis of articulation to the intermediate element.
  • a motorized member such as a jack hydraulic controlling the pivoting of this element intermediate around its axis of articulation audit main element
  • a coupling assembly comprising at least three articulated organs, of which the or central organ is connected also by articulation at a fixed point of the element arrow folding intermediate, causing the pivoting of this other main arrow element
  • This embodiment is well suited to a arrow composed of two main elements, namely a arrowhead and an arrowhead, relatively great length, and a single intermediate element of boom folding, sandwiched between the boom foot and the arrowhead, the length of which is substantially equal at the sum of the heights of the boom foot and the point arrow to obtain in height folded height minimum for transporting the crane.
  • the single draft of such a crane connects the top of a rigid punch, itself articulated to the top of the mast or on the rear part of the boom, a point on the front part of the arrow foot.
  • This provision compulsory in the case of a single tie rod for folding the boom, causes a cantilever important of said arrow in the aligned working position, the overhang being of length at least equal to the sum of the lengths of the arrow elements other than the arrow foot.
  • the boom cross section dimensions mainly in height to lighten the structure. The increase in the height of the boom goes against of the desired goal which is to reduce the size of the boom when folded to meet the road gauge in particular.
  • the present invention provides a solution to problems posed by the previous embodiment, in providing an arrow composed of several elements hinged together at their members lower, removing the overhang from the boom and reducing the transverse dimensions of the elements of arrow, therefore allowing an application to an arrow of greater length to be folded in on itself in several elements in a limited space, while authorizing automated assembly of the entire crane.
  • the motorized boom folding / unfolding bodies are double-acting hydraulic cylinders with a body articulated on a boom element and whose rod is articulated on the next adjacent boom element or previous.
  • the first intermediate boom folding element comprises two vertices each connected by a double triangulation lateral to the lower members of said element and connected between them longitudinally by a beam substantially in the middle a crosspiece, supporting the rigid punch before and forming the upper part of a transverse frame rigidly connecting the middle zones lower members, the first vertex carrying the axis transverse joint of the rod end of the cylinder controlling the pivoting of this first element intermediate around its axis of articulation at the foot of arrow, and the second vertex carrying the articulation axis transverse from the end of the cylinder body controlling the pivoting of the second main boom element around of its articulation on this first intermediate element.
  • the rigid front punch is articulated at its base around a transverse axis supported by the aforementioned crosspiece of the first intermediate boom folding element and has a lever at its bottom on the uprights of the frame comprising said crosspiece, allowing said punch to deviate, according to the mounting requirements, from its normal working position which is substantially perpendicular to the longitudinal direction of the arrow in position of job.
  • this comprises, in one embodiment particular, two vertically offset vertices and each linked by a double lateral triangulation to lower members of said element, the first vertex, of height appreciably greater than that of the other vertex, receiving the transverse articulation axis of the end of the cylinder rod controlling the pivoting of this second intermediate arrow folding element around its hinge pin to the second main boom element and the second vertex receiving the axis of articulation of the central member of the coupling assembly connecting the arrowhead to the second main arrow element.
  • the coupling assembly with three articulated members includes a first single or multiple connecting rod, connecting a transverse articulation axis carried by the part anterior of the second main arrow element to a articulation axis carried by a first end of the central organ, a bent lever with two branches forming said central organ, the elbow of which receives the articulation on the second vertex of the second intermediate element of boom folding, and a second simple connecting rod or multiple connecting an articulation axis crossing a light provided at the other end of the central organ to a transverse articulation carried by the part posterior of the arrowhead.
  • the tie rod foldable connecting the boom foot to the top of the punch rigid rear is formed from back to front of two successive rigid elements, namely: a first element simple having a length of the same order as the length of the rigid rear punch, and a second double element having a length of the same order as that of the member upper part of the jib foot located under the tie rod rear, the two tie rods being connected between them by a transverse articulation axis which can be mounted in different holes at the ends in look of the two tie rods to achieve different working configurations: boom substantially horizontal, arrow more or less raised.
  • the folding front link connecting the second element main arrow at the top of the front rigid punch carried by the first intermediate folding element of arrow is formed from back to front of three elements successive rigid, namely: a first double element having a length of the same order as the length of the rigid punch before, a second simple element and a third simple element preferably interconnected by two transverse articulation axes, one mounted without game and the other with play so as to allow a slight misalignment, the length of the assembly formed by these last two drawing elements being of the same order as that of the part of the second main arrow element located under the front link, the first element and the second tie member being connected together by a transverse hinge pin that can be mounted in different holes made at the ends opposite said tie rods to achieve different working configurations: boom substantially horizontal, arrow more or less raised.
  • the latter can be formed from back to front of seven elements successive rigid, namely: a first simple element U-shaped section open in direction external to the arrow, a second simple element of open U-section in the direction of the arrow connected to the first element by a transverse axis and having at its other end a guide device, a third simple element connected to the second element by a transverse axis carrying a pebble, a fourth element comprising in its part posterior a longitudinal slide through which slides a transverse axis, also carrying a roller, connecting it to the third element, a fifth element simple connected to the fourth element by a transverse axis, also bearing a roller, a sixth double element connected to the fifth element by a transverse axis carrying a diabolo and comprising at its front part a longitudinal slide, and a seventh single element bearing two transverse axes located one in front of the other and crossing the previous slide.
  • the crane shown schematically in Figure 1 comprises, in known manner, a fixed base chassis or rolling 1 supporting, by means of a device orientation 2, a rotating frame 3 which brings to the rear a balancing ballast 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 each other by articulation on their rear face around a horizontal axis 9.
  • This crane is provided with a folding folding jib 10 made in five successive elements, linked together by articulations around horizontal axes arranged at level of their lower members.
  • Arrow 10 includes three main elements of relatively great length respectively designated as jib foot 11, element arrow main 12 and arrow tip 13, and two arrow boom folding elements relatively short length, inserted between two main and designated boom elements respectively as first folding intermediate element 14 and second intermediate folding element 15.
  • the upper mast 8 is connected to the rotating frame 3 via two dressage shrouds 16 symmetrically arranged on either side of the mast 6 and articulated, both around a horizontal axis 17 located at the base of the upper mast 8 and around an axis horizontal 18 arranged at the rear part of the chassis turning 3.
  • the arrow 10 is articulated at the top of the mast 6 around a horizontal axis 19 and is held in position by a rear tie 20 connecting a fixed point 21 of the upper chord 22 of the jib foot 11 at the top 23 a rear rigid punch 24, inclined towards the rear of the crane and articulated at the base of the jib foot 11 around a horizontal axis 25, the rear rigid punch 24 being itself held in position by a rear tie rod retainer 26 connecting the top 23 of this rigid punch rear 24 at a fixed point 27 arranged at the rear part of the rotating chassis 3.
  • the crane is motorized for its assembly, i.e. for raising the mast 6, lifting and unfolding arrow 10.
  • the foldable mast 6 is motorized for its unfolding / folding in a known manner by a hydraulic cylinder double-acting 28.
  • the jib foot 11 has a part reduced height rear h1, located under the tie rod 20.
  • the first intermediate folding element of arrow 14, inserted between the foot of arrow 11 and the main boom element 12, includes two vertices successive 29, 30, appearing at the frame upper 22 of said boom foot 11, each connected by a double lateral triangulation respectively 31, 32 to the lower members 33 of this element 14, to the ends of which are located the joints 34 and 35 respectively on the two main boom elements 11 and 12, and interconnected by a longitudinal beam 36.
  • this element boom folding intermediate 14 has in its middle a transverse frame 37, rigidly connecting the median areas of the lower members 33 to the beam longitudinal 36.
  • the upper cross member 38 of the frame 37 supports the articulation, around a horizontal axis 39, of the base of a rigid punch before 40 whose part lower carries a lever 41 likely to come lean on the uprights 42 of the frame 37 by forming a acute angle A in the direction of the jib foot 11 relative to at a perpendicular 43 to said element 14.
  • a first double acting hydraulic cylinder 44-45 with body 44 is connected to the end of the upper chord 22 of the jib base 11 by articulation around an axis horizontal 46 and whose rod 45 is connected to the first top 29 of the intermediate boom folding element 14 by articulation around a horizontal axis 47, controls the pivoting of the first intermediate element of arrow folding 14 around its articulation 34 on the boom foot 11.
  • the main boom element 12 has a reduced height front part h2 at the end of which comes to fix a tie rod before 48, connecting a fixed point 49 of the upper chord 50 of this element 12 at the top 51 of the front rigid punch 40; a draft of link 52 connects the respective vertices 23 and 51 of the two punches 24 and 40.
  • a second double hydraulic cylinder effect 53-54 whose body 53 is connected to the second vertex 30 of the intermediate boom folding element 14 by articulation about a horizontal axis 55 and whose rod 54 is connected to the rear end of the frame upper 50 of the main boom element 12 by articulation around a horizontal axis 56, controls the pivoting of the main boom element 12 around its articulation 35 on the intermediate folding element arrow 14.
  • the second intermediate folding element of arrow 15, inserted between the main arrow element 12 and the arrowhead 13, includes as shown in detail in figure 10 two successive vertices 57 and 58 longitudinally offset and also substantially in height, each connected by a double triangulation lateral respectively 59, 60 at the lower members 61 of this element 15; at the ends of which are locate the respective joints 62 and 63 on the two arrow elements 12 and 13.
  • the top 57 most top, located opposite the main boom element 12, is located in the median plane of arrow 10, while the lowest vertex 58, located opposite the point of arrow 13 is double and is arranged substantially at plumb with the lower members 61 and at the level of the upper chord 64 of the arrowhead 13 when the elements of arrow 10 are aligned.
  • a third double acting hydraulic cylinder 65-66 with body 65 is connected to the front end of the frame upper 50 of the main boom element 12 by articulation around a horizontal axis 67 and whose rod 66 is connected to the first vertex 57 of the element intermediate boom folding 15 by articulation around a horizontal axis 68, controls the pivoting of the second intermediate arrow folding element 15 around of its articulation 62 on the main boom element 12.
  • a coupling assembly 69 produced in two parts symmetrical with respect to the longitudinal median plane of the arrow 10, each consisting of a bent lever 70 and two double connecting rods 71 and 72, connects the arrowhead 13 to the main boom element 12.
  • the angled lever 70 has two branches 73, 74, forming an obtuse angle of which the vertex is oriented towards the inside of arrow 10, and this lever 70 is articulated, at its elbow 75, around a horizontal axis 76 disposed at the top 58 of the intermediate boom folding element 15.
  • the first double connecting rod 71 joined by two joints around horizontal axes 77 and 78, respectively, the upper part of a support 79 fixed at the front end of the main boom element 12, and the free end of the posterior branch 73 of the bent lever 70.
  • the support 79 is a double support, formed of two parts symmetrical with respect to the longitudinal median plane of the arrow 10; the height of the double support 79 is substantially equal to that of arrow 10.
  • the second double connecting rod 72 joined by two articulations around of horizontal axes 80 and 81, respectively, the end free from the front branch 74 of the bent lever 70, at through a light 82 formed at this end, and the rear end of the upper member 64 of the arrowhead 13.
  • the arrowhead 13 is of reduced height h3 over its entire length, relative to the maximum height H arrow 10.
  • Both elements 83 and 84 are interconnected by an axis transverse joint that can be mounted in different holes 85 made at opposite ends of said elements 83 and 84.
  • the front tie 48 connecting the main arrow element 12 to the top 51 of the rigid punch before 40, is formed from back to front of three successive rigid elements 86, 87 and 88, namely: a first double element 86 whose length is the same order that the length of the rigid punch before 40, a second simple element 87 and a third simple element 88.
  • the second and third elements 87 and 88 are interconnected by two transverse articulation axes 89 and 90, one mounted without clearance and the other with clearance so as to allow a slight misalignment, the length of the set formed by these last two elements 87 and 88 being of the same order as that of the part of the second the main jib element 12 located under the tie rod before 48.
  • the first two elements 86 and 87 are connected between them by a transverse articulation axis which can be mounted in different holes 91 provided at the ends opposite said elements 86 and 87.
  • the tie rod 52 connecting the respective vertices 23 and 51 of the punches rigid rear 24 and front 40 is formed in this order of seven successive rigid elements.
  • a first element simple 92 of U-shaped section open to the outside in arrow 10 a second simple element 93 of section in an open U in the direction of the arrow connected to the first element 92 by a transverse axis 94 and comprising at its other end a guide device 95, a third simple element 96 connected to the second element 93 by an axis transverse 97 carrying a plastic roller, a fourth element 98 comprising in its rear part a longitudinal slide 99 through which is capable of sliding a transverse axis 100, bearing also a plastic roller, connecting it to the third element 96, a fifth simple element 101 connected to the fourth element 98 by a transverse axis 102, also carrying a plastic roller, a sixth double element 103 connected to the fifth element 101 by a transverse axis 104 carrying a diabolo in material plastic and comprising
  • the cylinder 44-45 operation is stopped when the arrow 10 is in the position shown in Figure 8, and detailed in figure 9, so that the folding of the crane as a whole can be carried out normally as known in itself by folding the mast 6. While the mast 6 is folds back, the rear punch 24 pivots forward around of its articulation 25, the rear tie rods 20 and of link 52 folds back together and the jib foot 11 flap above the upper mast 8 by pivoting around its articulation 19. When the mast 6 and the boom foot 11 are fully folded, the double acting hydraulic cylinder 44-45 in the direction retracting until reaching the fully folded position transport shown in figure 2.

Landscapes

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

Abstract

The crane comprises a foldable mast (6) in two parts (7,8), pivoted about a horizontal axis (9). A jib (10) is pivoted (19) at the mast top. The jib is made of several successive elements (11-15). A jib foot (11) of reduced height (h1) is situated in its rear part. An intermediate folding element (14) is connected to the jib foot by an actuator (44-45) carried by a front strut (40). A second jib part (12) of reduced height (h2) is situated in its front part is connected to the intermediate element by an actuator (53-54). A second folding element (15) is connected to the second jib element by an actuator (65-66). It carries a coupling (69) connecting it to the third jib point (13). The jib point of height (h3) is housed in the space between the rear and front parts of the jib when the crane is folded for transport. Tie rods (20,48,52) and front (40) and rear (24) struts support the jib elements.

Description

La présente invention se rapporte au domaine technique des grues à montage automatisé, notamment des grues à tour utilisées sur les chantiers de construction de bâtiments et de travaux publics, grues qui doivent être repliées pour leur transport sur route d'un chantier à un autre, ou d'un emplacement à un autre, dans les meilleures conditions possibles de rapidité, de sécurité et d'encombrement, sans intervention manuelle.The present invention relates to the field technique of self-erecting cranes, especially tower cranes used on construction sites of buildings and public works, cranes which must be folded up for transport on the road from a construction site to a other, or from one location to another, in the best possible conditions for speed, security and size, without manual intervention.

Cette invention est plus particulièrement relative à une grue équipée d'une flèche composée de plusieurs éléments successifs, articulés entre eux au niveau de leurs membrures inférieures, dont le repliage s'effectue sur elle-même et plus précisément encore à une flèche composée de plus de trois éléments avec des éléments de flèche principaux de relativement grande longueur et des éléments intermédiaires de plus faible longueur destinés à faciliter le repliage de la flèche et à minimiser l'encombrement de la flèche, une fois celle-ci repliée.This invention is more particularly relative to a crane equipped with a boom composed of several successive elements, articulated together at the level of their lower members, the folding of which is carried out on itself and more precisely still an arrow composed of more than three elements with elements of relatively long main boom and shortest intermediate elements intended for facilitate the folding of the boom and minimize the size of the boom, once it is folded.

Le principe d'une telle flèche de grue est enseigné par le document FR-A-2368430, ainsi que par les documents EP-A-0536061 et EP-A-0536060, lesquels décrivent de façon concrète des flèches repliables formées des deux éléments principaux de relativement grande longueur, entre lesquels s'intercale un élément intermédiaire unique de plus faible longueur.The principle of such a crane boom is taught by document FR-A-2368430, as well as by documents EP-A-0536061 and EP-A-0536060, which describe concretely folding arrows formed of the two relatively long main elements, between which interpose a single intermediate element of shorter length.

Plus particulièrement, les documents EP-A-0536060 et EP-A-0536061 décrivent un mode de réalisation d'une telle flèche de grue, dans lequel l'élément intermédiaire de pliage de flèche est relié à un élément principal de flèche adjacent par un organe motorisé tel que vérin hydraulique commandant le pivotement de cet élément intermédiaire autour de son axe d'articulation audit élément principal, tandis que l'autre élément principal de flèche adjacent est relié au précédent élément principal par un ensemble d'accouplement comportant au moins trois organes articulés, dont le ou un organe central est relié aussi par articulation à un point fixe de l'élément intermédiaire de pliage de flèche, provoquant ainsi le pivotement de cet autre élément principal de flèche autour de son axe d'articulation à l'élément intermédiaire.More particularly, documents EP-A-0536060 and EP-A-0536061 describe an embodiment of a such a crane boom, in which the intermediate element of folding boom is connected to a main element of adjacent boom by a motorized member such as a jack hydraulic controlling the pivoting of this element intermediate around its axis of articulation audit main element, while the other main element of adjacent arrow is connected to the previous main element by a coupling assembly comprising at least three articulated organs, of which the or central organ is connected also by articulation at a fixed point of the element arrow folding intermediate, causing the pivoting of this other main arrow element around from its axis of articulation to the intermediate element.

Ce mode de réalisation est bien adapté à une flèche composée de deux éléments principaux, à savoir un pied de flèche et une pointe de flèche, de relativement grande longueur, et d'un unique élément intermédiaire de pliage de flèche, intercalé entre le pied de flèche et la pointe de flèche, dont la longueur est sensiblement égale à la somme des hauteurs du pied de flèche et de la pointe de flèche pour obtenir en position repliée une hauteur minimale pour le transport de la grue.This embodiment is well suited to a arrow composed of two main elements, namely a arrowhead and an arrowhead, relatively great length, and a single intermediate element of boom folding, sandwiched between the boom foot and the arrowhead, the length of which is substantially equal at the sum of the heights of the boom foot and the point arrow to obtain in height folded height minimum for transporting the crane.

L'application de ce mode de réalisation à une flèche composée de plus de deux éléments principaux, par exemple trois éléments principaux à savoir un pied de flèche, un élément intermédiaire de flèche et une pointe de flèche de relativement grande longueur, et deux éléments intermédiaires de pliage de flèche intercalés entre les trois éléments principaux, peut conduire en position repliée à une hauteur trop importante pour respecter le gabarit de transport sur route de la grue.Applying this embodiment to a arrow composed of more than two main elements, by example three main elements namely a foot of arrow, an intermediate arrow element and a point relatively long boom, and two intermediate bending folding elements between the three main elements, can lead to folded position too high for respect the crane road transport gauge.

Par ailleurs, le tirant unique d'une telle grue relie le sommet d'un poinçon rigide, lui-même articulé au sommet du mât ou sur la partie postérieure de la flèche, à un point de la partie antérieure du pied de flèche. Cette disposition, obligatoire dans le cas d'un tirant unique pour le repliage de la flèche, entraíne un porte-à-faux important de ladite flèche en position alignée de travail, le porte-à-faux étant de longueur au moins égale à la somme des longueurs des éléments de flèche autres que le pied de flèche. Dans ces conditions, pour limiter les contraintes et les déformations de la structure de la flèche en porte-à-faux, il convient d'augmenter les dimensions de la section transversale de la flèche principalement en hauteur pour alléger la structure. L'augmentation de la hauteur de la flèche va à l'encontre du but recherché qui est de réduire l'encombrement de la flèche une fois repliée pour satisfaire au gabarit routier en particulier.Furthermore, the single draft of such a crane connects the top of a rigid punch, itself articulated to the top of the mast or on the rear part of the boom, a point on the front part of the arrow foot. This provision, compulsory in the case of a single tie rod for folding the boom, causes a cantilever important of said arrow in the aligned working position, the overhang being of length at least equal to the sum of the lengths of the arrow elements other than the arrow foot. In these conditions, to limit the stresses and deformations of the structure of the cantilever arrow, the boom cross section dimensions mainly in height to lighten the structure. The increase in the height of the boom goes against of the desired goal which is to reduce the size of the boom when folded to meet the road gauge in particular.

Enfin, l'application du même dispositif de pliage de flèche que celui décrit dans les documents EP-A-0536060 et EP-A-0536061 précités, à savoir un organe motorisé et un ensemble d'accouplement à trois organes articulés, entraínerait des efforts très importants dans l'organe motorisé de commande du pivotement de l'élément intermédiaire de pliage de flèche intercalé entre le pied de flèche et l'élément principal de flèche suivant, dans le cas d'une flèche composée de plus de deux éléments principaux.Finally, the application of the same folding device than that described in documents EP-A-0536060 and EP-A-0536061 cited above, namely a motorized member and a coupling assembly with three articulated members, would cause very significant efforts in the organ motorized element pivot control arrow folding intermediate inserted between the foot arrow and the next main arrow element, in the case of an arrow composed of more than two elements main.

La présente invention apporte une solution aux problèmes posés par le mode de réalisation précédent, en fournissant une flèche composée de plusieurs éléments articulés entre eux au niveau de leurs membrures inférieures, supprimant le porte-à-faux de la flèche et diminuant les dimensions transversales des éléments de flèche, donc permettant une application à une flèche de plus grande longueur devant se replier sur elle-même en plusieurs éléments dans un encombrement limité, tout en autorisant un montage automatisé de l'ensemble de la grue.The present invention provides a solution to problems posed by the previous embodiment, in providing an arrow composed of several elements hinged together at their members lower, removing the overhang from the boom and reducing the transverse dimensions of the elements of arrow, therefore allowing an application to an arrow of greater length to be folded in on itself in several elements in a limited space, while authorizing automated assembly of the entire crane.

A cet effet, une grue à montage automatisé avec flèche repliable sur elle-même, selon l'invention, comprend de façon connue un mât, notamment un mât pliable en deux parties, l'une inférieure et l'autre supérieure, reliées entre elles par articulation autour d'un axe horizontal, ou un mât télescopique, une flèche articulée au sommet du mât, réalisée en plusieurs éléments successifs articulés entre eux au niveau de leurs membrures inférieures avec des éléments de flèche principaux de relativement grande longueur et des éléments intermédiaires de pliage de flèche de relativement faible longueur s'intercalant entre deux éléments de flèche principaux, la flèche étant soutenue par un ensemble de tirants et de poinçons relié au sommet d'un poinçon rigide arrière lui-même articulé au sommet du mât ou sur la partie postérieure de la flèche, et un dispositif arrière de retenue reliant le sommet du poinçon rigide arrière à la partie arrière d'un châssis tournant qui est situé à la base du mât et qui porte un lest d'équilibrage, la partie inférieure du mât étant articulée autour d'un axe horizontal sur l'avant du châssis tournant, tandis qu'un organe motorisé, tel que vérin, commande le repliage/ dépliage ou le télescopage du mât et que d'autres organes motorisés commandent le repliage / dépliage de la flèche ; cette grue est caractérisée en ce que la flèche comprend :

  • un premier élément principal de flèche désigné comme pied de flèche, de hauteur réduite dans sa partie postérieure,
  • un premier élément intermédiaire de pliage de flèche, relié directement au pied de flèche par un organe motorisé commandant le pivotement de cet élément intermédiaire autour de son axe d'articulation audit pied de flèche, et portant par dessus un poinçon rigide avant,
  • un deuxième élément principal de flèche de longueur sensiblement égale à la longueur du pied de flèche précédent et de hauteur réduite dans sa partie antérieure, relié directement au premier élément intermédiaire de pliage de flèche par un organe motorisé commandant le pivotement de cet élément principal autour de son axe d'articulation audit premier élément intermédiaire de pliage de flèche,
  • un second élément intermédiaire de pliage de flèche, relié directement à l'élément principal de flèche précédent par un organe motorisé commandant le pivotement de ce second élément intermédiaire de pliage de flèche autour de son axe d'articulation au deuxième élément principal de flèche, et portant un ensemble d'accouplement du deuxième élément principal de flèche à un troisième élément principal de flèche désigné comme pointe de flèche,
  • la pointe de flèche, de hauteur adaptée de telle façon qu'elle vienne se loger dans l'espace ménagé entre la partie postérieure de hauteur réduite du pied de flèche et la partie antérieure de hauteur réduite du deuxième élément principal de flèche lorsque la grue est en position repliée pour son transport,
  • un tirant arrière repliable reliant le pied de flèche au sommet du poinçon rigide arrière,
  • un tirant avant repliable reliant le deuxième élément principal de flèche au sommet du poinçon rigide avant porté par le premier élément intermédiaire de pliage de flèche, et
  • un tirant de liaison repliable reliant le sommet du poinçon rigide avant au sommet du poinçon rigide arrière.
To this end, an automated assembly crane with foldable boom on itself, according to the invention, comprises in a known manner a mast, in particular a mast foldable in two parts, one lower and the other upper, connected together by articulation around a horizontal axis, or a telescopic mast, an arrow articulated at the top of the mast, produced in several successive elements articulated together at their lower members with main boom elements of relatively great length and intermediate elements relatively short length boom folding between two main boom elements, the boom being supported by a set of tie rods and punches connected to the top of a rigid rear punch itself articulated at the top of the mast or on the rear part of the boom, and a rear retaining device connecting the top of the rear rigid punch to the rear part of a frame ssis revolving which is located at the base of the mast and which carries a balancing ballast, the lower part of the mast being articulated around a horizontal axis on the front of the rotating chassis, while a motorized member, such as jack , controls the folding / unfolding or telescoping of the mast and that other motorized members control the folding / unfolding of the boom; this crane is characterized in that the boom comprises:
  • a first main boom element designated as a boom foot, of reduced height in its rear part,
  • a first intermediate jib folding element, connected directly to the jib foot by a motorized member controlling the pivoting of this intermediate element about its axis of articulation with said jib foot, and carrying a rigid front punch over it,
  • a second main jib element of length substantially equal to the length of the preceding jib foot and of reduced height in its front part, connected directly to the first intermediate jib folding element by a motorized member controlling the pivoting of this main element around its axis of articulation to said first intermediate boom folding element,
  • a second intermediate boom folding element, connected directly to the preceding main boom element by a motorized member controlling the pivoting of this second intermediate boom folding element about its axis of articulation with the second main boom element, and carrying a coupling assembly from the second main boom element to a third main boom element designated as an arrowhead,
  • the arrowhead, of a height adapted so that it comes to be housed in the space formed between the rear part of reduced height of the jib foot and the front part of reduced height of the second main jib element when the crane is in the folded position for transport,
  • a folding rear tie rod connecting the boom foot to the top of the rear rigid punch,
  • a folding front tie rod connecting the second main boom element to the top of the front rigid punch carried by the first intermediate boom folding element, and
  • a folding tie rod connecting the top of the front rigid punch to the top of the rear rigid punch.

Selon un mode de réalisation préférentiel, les organes motorisés de repliage / dépliage de la flèche sont des vérins hydrauliques à double effet dont le corps est articulé sur un élément de flèche et dont la tige est articulée sur l'élément de flèche adjacent suivant ou précédent.According to a preferred embodiment, the motorized boom folding / unfolding bodies are double-acting hydraulic cylinders with a body articulated on a boom element and whose rod is articulated on the next adjacent boom element or previous.

Selon une forme de réalisation particulière, le premier élément intermédiaire de pliage de flèche comporte deux sommets reliés chacun par une double triangulation latérale aux membrures inférieures dudit élément et reliés entre eux longitudinalement par une poutre portant sensiblement en son milieu une traverse, supportant le poinçon rigide avant et formant la partie supérieure d'un cadre transversal reliant rigidement les zones médianes des membrures inférieures, le premier sommet portant l'axe d'articulation transversal de l'extrémité de la tige du vérin commandant le pivotement de ce premier élément intermédiaire autour de son axe d'articulation au pied de flèche, et le deuxième sommet portant l'axe d'articulation transversal de l'extrémité du corps du vérin commandant le pivotement du deuxième élément principal de flèche autour de son articulation sur ce premier élément intermédiaire.According to a particular embodiment, the first intermediate boom folding element comprises two vertices each connected by a double triangulation lateral to the lower members of said element and connected between them longitudinally by a beam substantially in the middle a crosspiece, supporting the rigid punch before and forming the upper part of a transverse frame rigidly connecting the middle zones lower members, the first vertex carrying the axis transverse joint of the rod end of the cylinder controlling the pivoting of this first element intermediate around its axis of articulation at the foot of arrow, and the second vertex carrying the articulation axis transverse from the end of the cylinder body controlling the pivoting of the second main boom element around of its articulation on this first intermediate element.

Suivant une caractéristique complémentaire, le poinçon rigide avant est articulé à sa base autour d'un axe transversal supporté par la traverse précitée du premier élément intermédiaire de pliage de flèche et possède à sa partie inférieure un levier venant s'appuyer sur les montants du cadre comportant ladite traverse, permettant audit poinçon de s'écarter, suivant les nécessités de montage, de sa position normale de travail qui se présente sensiblement perpendiculaire à la direction longitudinale de la flèche en position de travail.According to an additional characteristic, the rigid front punch is articulated at its base around a transverse axis supported by the aforementioned crosspiece of the first intermediate boom folding element and has a lever at its bottom on the uprights of the frame comprising said crosspiece, allowing said punch to deviate, according to the mounting requirements, from its normal working position which is substantially perpendicular to the longitudinal direction of the arrow in position of job.

Quant au second élément intermédiaire de pliage de flèche, celui-ci comporte, dans une forme de réalisation particulière, deux sommets décalés longitudinalement et reliés chacun par une double triangulation latérale aux membrures inférieures dudit élément, le premier sommet, de hauteur sensiblement supérieure à celle de l'autre sommet, recevant l'axe d'articulation transversal de l'extrémité de la tige du vérin commandant le pivotement de ce second élément intermédiaire de pliage de flèche autour de son axe d'articulation au deuxième élément principal de flèche et le second sommet recevant l'axe d'articulation de l'organe central de l'ensemble d'accouplement reliant la pointe de flèche au deuxième élément principal de flèche.As for the second intermediate folding element of arrow, this comprises, in one embodiment particular, two vertically offset vertices and each linked by a double lateral triangulation to lower members of said element, the first vertex, of height appreciably greater than that of the other vertex, receiving the transverse articulation axis of the end of the cylinder rod controlling the pivoting of this second intermediate arrow folding element around its hinge pin to the second main boom element and the second vertex receiving the axis of articulation of the central member of the coupling assembly connecting the arrowhead to the second main arrow element.

Suivant une caractéristique complémentaire, l'ensemble d'accouplement à trois organes articulés comprend une première bielle simple ou multiple, reliant un axe d'articulation transversal porté par la partie antérieure du deuxième élément principal de flèche à un axe d'articulation porté par une première extrémité de l'organe central, un levier coudé à deux branches formant ledit organe central, dont le coude reçoit l'articulation sur le second sommet du second élément intermédiaire de pliage de flèche, et une deuxième bielle simple ou multiple reliant un axe d'articulation traversant une lumière ménagée à l'autre extrémité de l'organe central à une articulation transversale portée par la partie postérieure de la pointe de flèche.According to an additional characteristic, the coupling assembly with three articulated members includes a first single or multiple connecting rod, connecting a transverse articulation axis carried by the part anterior of the second main arrow element to a articulation axis carried by a first end of the central organ, a bent lever with two branches forming said central organ, the elbow of which receives the articulation on the second vertex of the second intermediate element of boom folding, and a second simple connecting rod or multiple connecting an articulation axis crossing a light provided at the other end of the central organ to a transverse articulation carried by the part posterior of the arrowhead.

Selon un mode d'exécution, le tirant arrière repliable reliant le pied de flèche au sommet du poinçon rigide arrière est formé d'arrière en avant de deux éléments rigides successifs, à savoir : un premier élément simple ayant une longueur du même ordre que la longueur du poinçon rigide arrière, et un deuxième élément double ayant une longueur du même ordre que celle de la membrure supérieure du pied de flèche située sous le tirant arrière, les deux éléments de tirant étant reliés entre eux par un axe d'articulation transversal pouvant être monté dans différents trous ménagés aux extrémités en regard des deux éléments de tirant pour réaliser différentes configurations de travail : flèche sensiblement horizontale, flèche plus ou moins relevée.According to one embodiment, the tie rod foldable connecting the boom foot to the top of the punch rigid rear is formed from back to front of two successive rigid elements, namely: a first element simple having a length of the same order as the length of the rigid rear punch, and a second double element having a length of the same order as that of the member upper part of the jib foot located under the tie rod rear, the two tie rods being connected between them by a transverse articulation axis which can be mounted in different holes at the ends in look of the two tie rods to achieve different working configurations: boom substantially horizontal, arrow more or less raised.

Dans une forme de réalisation particulière, le tirant avant repliable reliant le deuxième élément principal de flèche au sommet du poinçon rigide avant porté par le premier élément intermédiaire de pliage de flèche est formé d'arrière en avant de trois éléments rigides successifs, à savoir : un premier élément double ayant une longueur du même ordre que la longueur du poinçon rigide avant, un deuxième élément simple et un troisième élément simple reliés entre eux de préférence par deux axes d'articulation transversaux, l'un monté sans jeu et l'autre avec jeu de manière à permettre un léger désalignement, la longueur de l'ensemble formé par ces deux derniers éléments de tirant étant du même ordre que celle de la partie du deuxième élément principal de flèche située sous le tirant avant, le premier élément et le deuxième élément de tirant étant reliés entre eux par un axe d'articulation transversal pouvant être monté dans différents trous ménagés aux extrémités en regard desdits éléments de tirant pour réaliser différentes configurations de travail : flèche sensiblement horizontale, flèche plus ou moins relevée.In a particular embodiment, the folding front link connecting the second element main arrow at the top of the front rigid punch carried by the first intermediate folding element of arrow is formed from back to front of three elements successive rigid, namely: a first double element having a length of the same order as the length of the rigid punch before, a second simple element and a third simple element preferably interconnected by two transverse articulation axes, one mounted without game and the other with play so as to allow a slight misalignment, the length of the assembly formed by these last two drawing elements being of the same order as that of the part of the second main arrow element located under the front link, the first element and the second tie member being connected together by a transverse hinge pin that can be mounted in different holes made at the ends opposite said tie rods to achieve different working configurations: boom substantially horizontal, arrow more or less raised.

Quant au tirant de liaison repliable reliant les sommets des poinçons rigides arrière et avant, ce dernier peut être formé d'arrière en avant de sept éléments rigides successifs, à savoir : un premier élément simple de section en U ouverte en direction extérieure à la flèche, un deuxième élément simple de section en U ouverte en direction de la flèche relié au premier élément par un axe transversal et comportant à son autre extrémité un dispositif de guidage, un troisième élément simple relié au deuxième élément par un axe transversal portant un galet, un quatrième élément comportant dans sa partie postérieure une glissière longitudinale à travers laquelle coulisse un axe transversal, portant également un galet, le reliant au troisième élément, un cinquième élément simple relié au quatrième élément par un axe transversal, portant également un galet, un sixième élément double relié au cinquième élément par un axe transversal portant un diabolo et comportant à sa partie antérieure une glissière longitudinale, et un septième élément simple portant deux axes transversaux situés l'un devant l'autre et traversant la glissière précédente.As for the folding tie rod connecting the tops of the rear and front rigid punches, the latter can be formed from back to front of seven elements successive rigid, namely: a first simple element U-shaped section open in direction external to the arrow, a second simple element of open U-section in the direction of the arrow connected to the first element by a transverse axis and having at its other end a guide device, a third simple element connected to the second element by a transverse axis carrying a pebble, a fourth element comprising in its part posterior a longitudinal slide through which slides a transverse axis, also carrying a roller, connecting it to the third element, a fifth element simple connected to the fourth element by a transverse axis, also bearing a roller, a sixth double element connected to the fifth element by a transverse axis carrying a diabolo and comprising at its front part a longitudinal slide, and a seventh single element bearing two transverse axes located one in front of the other and crossing the previous slide.

Quels que soient les détails de construction, on réalise ainsi une grue à montage automatisé dont le repliage s'effectue automatiquement, c'est-à-dire sans intervention manuelle, notamment pour son transport sur route, les différents tirants se repliant contre les éléments de flèche, en tenant compte de la configuration particulière de ces éléments de flèche.Whatever the construction details, we thus realizes a crane with automatic assembly whose folding takes place automatically, i.e. without manual intervention, especially for its transport on road, the different tie rods folding back against the boom elements, taking into account the configuration particular of these boom elements.

De toute façon, l'invention sera mieux comprise, à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de cette grue à montage automatisé avec flèche repliable sur elle-même :

  • Figure 1 montre, en vue de côté, une grue selon l'invention en position de travail ;
  • Figure 2 montre la même grue, en vue de côté, en position repliée pour son transport ;
  • Figures 3 à 8 illustrent plusieurs phases de dépliage / repliage de la flèche de cette grue ;
  • Figure 9 montre en détail le premier élément intermédiaire de pliage de flèche avec le poinçon rigide avant ;
  • Figure 10 montre en détail le second élément intermédiaire de pliage de flèche avec l'ensemble d'accouplement à trois organes articulés ;
  • Figure 11 montre, en position alignée, le détail du tirant arrière reliant le pied de flèche au sommet du poinçon rigide arrière ;
  • Figure 12 montre, en position alignée, le détail du tirant avant reliant le deuxième élément principal de flèche au sommet du poinçon rigide avant ;
  • Figure 13 montre, en position alignée, le détail du tirant de liaison reliant les sommets respectifs des poinçons rigides avant et arrière.
    • Anyway, the invention will be better understood, with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of example, an embodiment of this self-erecting crane with folding boom on herself :
  • Figure 1 shows, in side view, a crane according to the invention in the working position;
  • Figure 2 shows the same crane, in side view, in the folded position for transport;
  • Figures 3 to 8 illustrate several phases of unfolding / folding the boom of this crane;
  • Figure 9 shows in detail the first intermediate boom folding element with the front rigid punch;
  • Figure 10 shows in detail the second intermediate boom folding element with the coupling assembly with three articulated members;
  • Figure 11 shows, in an aligned position, the detail of the rear tie rod connecting the boom foot to the top of the rear rigid punch;
  • Figure 12 shows, in an aligned position, the detail of the front tie connecting the second main boom element to the top of the front rigid punch;
  • Figure 13 shows, in an aligned position, the detail of the tie rod connecting the respective tops of the front and rear rigid punches.

    • La grue représentée schématiquement à la figure 1 comprend, de façon connue, un châssis de base fixe ou roulant 1 supportant, par l'intermédiaire d'un dispositif d'orientation 2, un châssis tournant 3 qui porte à l'arrière un lest d'équilibrage 4 et à l'avant duquel est articulé, autour d'un axe horizontal 5, un mât pliable 6 composé d'un mât de base 7 et d'un mât supérieur 8 reliés l'un à l'autre par articulation sur leur face arrière autour d'un axe horizontal 9. Cette grue est pourvue d'une flèche distributrice 10 repliable réalisée en cinq éléments successifs, reliés entre eux par des articulations autour d'axes horizontaux disposés au niveau de leurs membrures inférieures. La flèche 10 comprend trois éléments principaux de relativement grande longueur désignés respectivement comme pied de flèche 11, élément principal de flèche 12 et pointe de flèche 13, et deux éléments intermédiaires de pliage de flèche de relativement faible longueur, s'intercalant entre deux éléments de flèche principaux et désignés respectivement comme premier élément intermédiaire de pliage 14 et second élément intermédiaire de pliage 15.The crane shown schematically in Figure 1 comprises, in known manner, a fixed base chassis or rolling 1 supporting, by means of a device orientation 2, a rotating frame 3 which brings to the rear a balancing ballast 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 each other by articulation on their rear face around a horizontal axis 9. This crane is provided with a folding folding jib 10 made in five successive elements, linked together by articulations around horizontal axes arranged at level of their lower members. Arrow 10 includes three main elements of relatively great length respectively designated as jib foot 11, element arrow main 12 and arrow tip 13, and two arrow boom folding elements relatively short length, inserted between two main and designated boom elements respectively as first folding intermediate element 14 and second intermediate folding element 15.

    Le mât supérieur 8 est relié au châssis tournant 3 par l'intermédiaire de deux haubans de dressage 16 disposés symétriquement de part et d'autre du mât 6 et articulés, l'un et l'autre, autour d'un axe horizontal 17 situé à la base du mât supérieur 8 et autour d'un axe horizontal 18 disposé à la partie arrière du châssis tournant 3.The upper mast 8 is connected to the rotating frame 3 via two dressage shrouds 16 symmetrically arranged on either side of the mast 6 and articulated, both around a horizontal axis 17 located at the base of the upper mast 8 and around an axis horizontal 18 arranged at the rear part of the chassis turning 3.

    La flèche 10 est articulée au sommet du mât 6 autour d'un axe horizontal 19 et est maintenue en position par un tirant arrière 20 reliant un point fixe 21 de la membrure supérieure 22 du pied de flèche 11 au sommet 23 d'un poinçon rigide arrière 24, incliné vers l'arrière de la grue et articulé à la base du pied de flèche 11 autour d'un axe horizontal 25, le poinçon rigide arrière 24 étant lui même maintenu en position par un tirant arrière de retenue 26 reliant le sommet 23 de ce poinçon rigide arrière 24 à un point fixe 27 disposé à la partie arrière du châssis tournant 3.The arrow 10 is articulated at the top of the mast 6 around a horizontal axis 19 and is held in position by a rear tie 20 connecting a fixed point 21 of the upper chord 22 of the jib foot 11 at the top 23 a rear rigid punch 24, inclined towards the rear of the crane and articulated at the base of the jib foot 11 around a horizontal axis 25, the rear rigid punch 24 being itself held in position by a rear tie rod retainer 26 connecting the top 23 of this rigid punch rear 24 at a fixed point 27 arranged at the rear part of the rotating chassis 3.

    La grue est motorisée pour son montage, c'est-à-dire pour le dressage du mât 6, le relevage et le dépliage de la flèche 10. Le mât pliable 6 est motorisé pour son dépliage/repliage de façon connue par un vérin hydraulique à double effet 28.The crane is motorized for its assembly, i.e. for raising the mast 6, lifting and unfolding arrow 10. The foldable mast 6 is motorized for its unfolding / folding in a known manner by a hydraulic cylinder double-acting 28.

    Le pied de flèche 11 comporte une partie postérieure de hauteur réduite h1, située sous le tirant 20.The jib foot 11 has a part reduced height rear h1, located under the tie rod 20.

    Le premier élément intermédiaire de pliage de flèche 14, intercalé entre le pied de flèche 11 et l'élément principal de flèche 12, comprend deux sommets successifs 29, 30, se présentant au niveau de la membrure supérieure 22 dudit pied de flèche 11, reliés chacun par une double triangulation latérale respectivement 31, 32 aux membrures inférieures 33 de cet élément 14, aux extrémités desquelles se situent les articulations 34 et 35 respectives sur les deux éléments de flèche principaux 11 et 12, et reliés entre eux par une poutre longitudinale 36. Comme montré en détail à la figure 9, cet élément intermédiaire de pliage de flèche 14 comporte en son milieu un cadre transversal 37, reliant rigidement les zones médianes des membrures inférieures 33 à la poutre longitudinale 36. La traverse supérieure 38 du cadre 37 supporte l'articulation, autour d'un axe horizontal 39, de la base d'un poinçon rigide avant 40 dont la partie inférieure porte un levier 41 susceptible de venir s'appuyer sur les montants 42 du cadre 37 en formant un angle aigu A en direction du pied de flèche 11 par rapport à une perpendiculaire 43 audit élément 14. Un premier vérin hydraulique à double effet 44-45 dont le corps 44 est relié à l'extrémité de la membrure supérieure 22 du pied de flèche 11 par articulation autour d'un axe horizontal 46 et dont la tige 45 est reliée au premier sommet 29 de l'élément intermédiaire de pliage de flèche 14 par articulation autour d'un axe horizontal 47, commande le pivotement du premier élément intermédiaire de pliage de flèche 14 autour de son articulation 34 sur le pied de flèche 11.The first intermediate folding element of arrow 14, inserted between the foot of arrow 11 and the main boom element 12, includes two vertices successive 29, 30, appearing at the frame upper 22 of said boom foot 11, each connected by a double lateral triangulation respectively 31, 32 to the lower members 33 of this element 14, to the ends of which are located the joints 34 and 35 respectively on the two main boom elements 11 and 12, and interconnected by a longitudinal beam 36. As shown in detail in Figure 9, this element boom folding intermediate 14 has in its middle a transverse frame 37, rigidly connecting the median areas of the lower members 33 to the beam longitudinal 36. The upper cross member 38 of the frame 37 supports the articulation, around a horizontal axis 39, of the base of a rigid punch before 40 whose part lower carries a lever 41 likely to come lean on the uprights 42 of the frame 37 by forming a acute angle A in the direction of the jib foot 11 relative to at a perpendicular 43 to said element 14. A first double acting hydraulic cylinder 44-45 with body 44 is connected to the end of the upper chord 22 of the jib base 11 by articulation around an axis horizontal 46 and whose rod 45 is connected to the first top 29 of the intermediate boom folding element 14 by articulation around a horizontal axis 47, controls the pivoting of the first intermediate element of arrow folding 14 around its articulation 34 on the boom foot 11.

    L'élément principal de flèche 12 comporte une partie antérieure de hauteur réduite h2 à l'extrémité de laquelle vient se fixer un tirant avant 48, reliant un point fixe 49 de la membrure supérieure 50 de cet élément 12 au sommet 51 du poinçon rigide avant 40 ; un tirant de liaison 52 relie les sommets respectifs 23 et 51 des deux poinçons 24 et 40. Un deuxième vérin hydraulique à double effet 53-54 dont le corps 53 est relié au deuxième sommet 30 de l'élément intermédiaire de pliage de flèche 14 par articulation autour d'un axe horizontal 55 et dont la tige 54 est reliée à l'extrémité postérieure de la membrure supérieure 50 de l'élément principal de flèche 12 par articulation autour d'un axe horizontal 56, commande le pivotement de l'élément principal de flèche 12 autour de son articulation 35 sur l'élément intermédiaire de pliage de flèche 14.The main boom element 12 has a reduced height front part h2 at the end of which comes to fix a tie rod before 48, connecting a fixed point 49 of the upper chord 50 of this element 12 at the top 51 of the front rigid punch 40; a draft of link 52 connects the respective vertices 23 and 51 of the two punches 24 and 40. A second double hydraulic cylinder effect 53-54 whose body 53 is connected to the second vertex 30 of the intermediate boom folding element 14 by articulation about a horizontal axis 55 and whose rod 54 is connected to the rear end of the frame upper 50 of the main boom element 12 by articulation around a horizontal axis 56, controls the pivoting of the main boom element 12 around its articulation 35 on the intermediate folding element arrow 14.

    Le second élément intermédiaire de pliage de flèche 15, intercalé entre l'élément principal de flèche 12 et la pointe de flèche 13, comprend comme montré en détail à la figure 10 deux sommets successifs 57 et 58 décalés longitudinalement et aussi sensiblement en hauteur, reliés chacun par une double triangulation latérale respectivement 59, 60 aux membrures inférieures 61 de cet élément 15 ; aux extrémités desquelles se situent les articulations 62 et 63 respectives sur les deux éléments de flèche 12 et 13. Le sommet 57 le plus haut, situé en regard de l'élément principal de flèche 12, est situé dans le plan médian de la flèche 10, tandis que le sommet 58 le plus bas, situé en regard de la pointe de flèche 13 est double et est disposé sensiblement à l'aplomb des membrures inférieures 61 et au niveau de la membrure supérieure 64 de la pointe de flèche 13 lorsque les éléments de la flèche 10 sont alignés. Un troisième vérin hydraulique à double effet 65-66 dont le corps 65 est relié à l'extrémité antérieure de la membrure supérieure 50 de l'élément principal de flèche 12 par articulation autour d'un axe horizontal 67 et dont la tige 66 est reliée au premier sommet 57 de l'élément intermédiaire de pliage de flèche 15 par articulation autour d'un axe horizontal 68, commande le pivotement du second élément intermédiaire de pliage de flèche 15 autour de son articulation 62 sur l'élément principal de flèche 12. Un ensemble d'accouplement 69 réalisé en deux parties symétriques par rapport au plan médian longitudinal de la flèche 10, constituées chacune d'un levier coudé 70 et de deux doubles bielles 71 et 72, relie la pointe de flèche 13 à l'élément principal de flèche 12. Le levier coudé 70 comporte deux branches 73, 74, formant un angle obtus dont le sommet est orienté vers l'intérieur de la flèche 10, et ce levier 70 est articulé, au niveau de son coude 75, autour d'un axe horizontal 76 disposé au sommet 58 de l'élément intermédiaire de pliage de flèche 15. La première double bielle 71 réunit par deux articulations autour d'axes horizontaux 77 et 78, respectivement, la partie supérieure d'un support 79 fixé à l'extrémité avant de l'élément principal de flèche 12, et l'extrémité libre de la branche postérieure 73 du levier coudé 70. En correspondance avec la disposition des bielles 71, le support 79 est un support double, formé de deux parties symétriques par rapport au plan médian longitudinal de la flèche 10 ; la hauteur du support double 79 est sensiblement égale à celle de la flèche 10. La deuxième double bielle 72 réunit par deux articulations autour d'axes horizontaux 80 et 81, respectivement, l'extrémité libre de la branche antérieure 74 du levier coudé 70, à travers une lumière 82 ménagée à cette extrémité, et l'extrémité arrière de la membrure supérieure 64 de la pointe de flèche 13.The second intermediate folding element of arrow 15, inserted between the main arrow element 12 and the arrowhead 13, includes as shown in detail in figure 10 two successive vertices 57 and 58 longitudinally offset and also substantially in height, each connected by a double triangulation lateral respectively 59, 60 at the lower members 61 of this element 15; at the ends of which are locate the respective joints 62 and 63 on the two arrow elements 12 and 13. The top 57 most top, located opposite the main boom element 12, is located in the median plane of arrow 10, while the lowest vertex 58, located opposite the point of arrow 13 is double and is arranged substantially at plumb with the lower members 61 and at the level of the upper chord 64 of the arrowhead 13 when the elements of arrow 10 are aligned. A third double acting hydraulic cylinder 65-66 with body 65 is connected to the front end of the frame upper 50 of the main boom element 12 by articulation around a horizontal axis 67 and whose rod 66 is connected to the first vertex 57 of the element intermediate boom folding 15 by articulation around a horizontal axis 68, controls the pivoting of the second intermediate arrow folding element 15 around of its articulation 62 on the main boom element 12. A coupling assembly 69 produced in two parts symmetrical with respect to the longitudinal median plane of the arrow 10, each consisting of a bent lever 70 and two double connecting rods 71 and 72, connects the arrowhead 13 to the main boom element 12. The angled lever 70 has two branches 73, 74, forming an obtuse angle of which the vertex is oriented towards the inside of arrow 10, and this lever 70 is articulated, at its elbow 75, around a horizontal axis 76 disposed at the top 58 of the intermediate boom folding element 15. The first double connecting rod 71 joined by two joints around horizontal axes 77 and 78, respectively, the upper part of a support 79 fixed at the front end of the main boom element 12, and the free end of the posterior branch 73 of the bent lever 70. In correspondence with the arrangement of the connecting rods 71, the support 79 is a double support, formed of two parts symmetrical with respect to the longitudinal median plane of the arrow 10; the height of the double support 79 is substantially equal to that of arrow 10. The second double connecting rod 72 joined by two articulations around of horizontal axes 80 and 81, respectively, the end free from the front branch 74 of the bent lever 70, at through a light 82 formed at this end, and the rear end of the upper member 64 of the arrowhead 13.

    La pointe de flèche 13 est de hauteur réduite h3 sur toute sa longueur, par rapport à la hauteur maximale H de la flèche 10.The arrowhead 13 is of reduced height h3 over its entire length, relative to the maximum height H arrow 10.

    Les cinq éléments successifs 11, 14, 12, 15, 13, de la flèche 10 étant en position alignée comme montré aux figures 1 et 3, les vérins 44-45, 53-54, 65-66 entièrement sortis et l'ensemble d'accouplement 69 sont sensiblement alignés avec la membrure supérieure 22, 50, 64 de la flèche 10.The five successive elements 11, 14, 12, 15, 13, of arrow 10 being in the aligned position as shown in Figures 1 and 3, cylinders 44-45, 53-54, 65-66 entirely come out and the coupling assembly 69 are substantially aligned with the upper chord 22, 50, 64 of the arrow 10.

    Comme montré à la figure 11, le tirant arrière 20, reliant le pied de flèche 11 au sommet 23 du poinçon rigide arrière 24, est formé d'arrière en avant de deux éléments rigides successifs 83 et 84, à savoir : un premier élément simple 83 dont la longueur est du même ordre que la longueur du poinçon rigide arrière 24, et un deuxième élément double 84 dont la longueur est du même ordre que celle de la membrure supérieure 22 du pied de flèche 11 située sous le tirant arrière 20. Les deux éléments 83 et 84 sont reliés entre eux par un axe d'articulation transversal pouvant être monté dans différents trous 85 ménagés aux extrémités en regard desdits éléments 83 et 84.As shown in FIG. 11, the rear tie rod 20, connecting the jib foot 11 to the top 23 of the punch rigid rear 24, formed from back to front of two successive rigid elements 83 and 84, namely: a first simple element 83 whose length is the same order that the length of the rear rigid punch 24, and a second double element 84 whose length is the same order as that of the upper chord 22 of the foot of arrow 11 located under the tie rod 20. Both elements 83 and 84 are interconnected by an axis transverse joint that can be mounted in different holes 85 made at opposite ends of said elements 83 and 84.

    En utilisant les différents brochages possibles, on obtient soit une flèche 10 horizontale, soit une flèche 10 plus ou moins relevée.Using the different possible pinouts, we get either a horizontal arrow 10 or an arrow 10 more or less raised.

    Comme montré à la figure 12, le tirant avant 48, reliant l'élément principal de flèche 12 au sommet 51 du poinçon rigide avant 40, est formé d'arrière en avant de trois éléments rigides successifs 86 ,87 et 88, à savoir : un premier élément double 86 dont la longueur est du même ordre que la longueur du poinçon rigide avant 40, un deuxième élément simple 87 et un troisième élément simple 88. Les deuxième et troisième éléments 87 et 88 sont reliés entre eux par deux axes d'articulation transversaux 89 et 90, l'un monté sans jeu et l'autre avec jeu de manière à permettre un léger désalignement, la longueur de l'ensemble formé par ces deux derniers éléments 87 et 88 étant du même ordre que celle de la partie du deuxième l'élément principal de flèche 12 située sous le tirant avant 48. Les deux premiers éléments 86 et 87 sont reliés entre eux par un axe d'articulation transversal pouvant être monté dans différents trous 91 ménagés aux extrémités en regard desdits éléments 86 et 87.As shown in Figure 12, the front tie 48, connecting the main arrow element 12 to the top 51 of the rigid punch before 40, is formed from back to front of three successive rigid elements 86, 87 and 88, namely: a first double element 86 whose length is the same order that the length of the rigid punch before 40, a second simple element 87 and a third simple element 88. The second and third elements 87 and 88 are interconnected by two transverse articulation axes 89 and 90, one mounted without clearance and the other with clearance so as to allow a slight misalignment, the length of the set formed by these last two elements 87 and 88 being of the same order as that of the part of the second the main jib element 12 located under the tie rod before 48. The first two elements 86 and 87 are connected between them by a transverse articulation axis which can be mounted in different holes 91 provided at the ends opposite said elements 86 and 87.

    De la même façon que pour le tirant arrière 20, on peut allonger ou raccourcir le tirant avant 48 en utilisant les différents brochages possibles, pour obtenir soit une flèche 10 horizontale, soit une flèche 10 plus ou moins relevée. In the same way as for the tie rod 20, we can lengthen or shorten the front link 48 in using the different possible pinouts, to obtain either a horizontal arrow 10, or an arrow 10 plus or less noticeable.

    Comme montré à la figure 13, le tirant de liaison 52 reliant les sommets respectifs 23 et 51 des poinçons rigides arrière 24 et avant 40 est formé suivant cet ordre de sept éléments rigides successifs. Un premier élément simple 92 de section en U ouverte en direction extérieure à la flèche 10, un deuxième élément simple 93 de section en U ouverte en direction de la flèche relié au premier élément 92 par un axe transversal 94 et comportant à son autre extrémité un dispositif de guidage 95, un troisième élément simple 96 relié au deuxième élément 93 par un axe transversal 97 portant un galet en matière plastique, un quatrième élément 98 comportant dans sa partie postérieure une glissière longitudinale 99 à travers laquelle est susceptible de coulisser un axe transversal 100, portant également un galet en matière plastique, le reliant au troisième élément 96, un cinquième élément simple 101 relié au quatrième élément 98 par un axe transversal 102, portant également un galet en matière plastique, un sixième élément double 103 relié au cinquième élément 101 par un axe transversal 104 portant un diabolo en matière plastique et comportant une glissière longitudinale 105, un septième élément simple 106 portant deux axes transversaux 107 et 108, situés l'un devant l'autre et traversant tous deux la glissière précédente 105.As shown in Figure 13, the tie rod 52 connecting the respective vertices 23 and 51 of the punches rigid rear 24 and front 40 is formed in this order of seven successive rigid elements. A first element simple 92 of U-shaped section open to the outside in arrow 10, a second simple element 93 of section in an open U in the direction of the arrow connected to the first element 92 by a transverse axis 94 and comprising at its other end a guide device 95, a third simple element 96 connected to the second element 93 by an axis transverse 97 carrying a plastic roller, a fourth element 98 comprising in its rear part a longitudinal slide 99 through which is capable of sliding a transverse axis 100, bearing also a plastic roller, connecting it to the third element 96, a fifth simple element 101 connected to the fourth element 98 by a transverse axis 102, also carrying a plastic roller, a sixth double element 103 connected to the fifth element 101 by a transverse axis 104 carrying a diabolo in material plastic and comprising a longitudinal slide 105, a seventh simple element 106 carrying two axes transverse 107 and 108, located one in front of the other and both crossing the previous slide 105.

    A partir de la position dépliée montrée à la figure 1, le repliage automatisé de la flèche 10 illustré aux figures 3 à 8 s'effectue séquentiellement de la manière décrite ci-après.From the unfolded position shown in the Figure 1, the automated folding of the arrow 10 illustrated in Figures 3 to 8 is carried out sequentially from the as described below.

    Dans un premier temps, en actionnant le vérin hydraulique à double effet 65-66 dans le sens rentrant, la tige 66 s'enfonce dans le corps 65 du vérin et la distance entre les deux articulations 67 et 68 portées respectivement par l'élément principal de flèche 12 et par le second élément intermédiaire de pliage de flèche 15 se raccourcit. De ce fait, l'ensemble constitué des deux éléments de flèche 13 et 15 pivote autour de l'articulation 62 de la flèche 10. En même temps, la distance entre les articulations 81 et 77 portées respectivement par la pointe de flèche 13 et par l'élément principal de flèche 12 se raccourcit également, entraínant la rotation du levier coudé 70 autour de l'articulation 76 du second élément intermédiaire de pliage de flèche 15 et en conséquence le pivotement de la pointe de flèche 13 autour de l'articulation 63 de la flèche 10.First, by actuating the cylinder double acting hydraulic 65-66 in the inward direction, the rod 66 sinks into the cylinder body 65 and the distance between the two joints 67 and 68 carried respectively by the main arrow element 12 and by the second intermediate boom folding element 15 is shortens. Therefore, the set made up of the two arrow elements 13 and 15 rotates around the articulation 62 of the arrow 10. At the same time, the distance between joints 81 and 77 carried respectively by the arrowhead 13 and by the element arrow main 12 also shortens, resulting the rotation of the bent lever 70 around the articulation 76 of the second intermediate boom folding element 15 and consequently the pivoting of the arrowhead 13 around the articulation 63 of the arrow 10.

    On constate ainsi que, simultanément, le second élément intermédiaire de pliage de flèche 15 et la pointe de flèche 13 pivotent respectivement autour des articulations 62 et 63 de la flèche 10, en passant par la position intermédiaire de la figure 4 jusqu'à ce que la pointe de flèche 13 soit située entièrement au-dessus de l'élément principal de flèche 12.We thus see that, simultaneously, the second intermediate arrow folding element 15 and the point 13 respectively rotate around the joints 62 and 63 of arrow 10, passing through the intermediate position of Figure 4 until the arrowhead 13 is located entirely above the main boom element 12.

    Dans cette configuration montrée à la figure 5 et détaillée à la figure 10, on voit que la pointe de flèche 13 est renversée et occupe une position sensiblement écartée de l'élément principal de flèche 12 pour laisser passer le tirant avant 48, tandis que l'axe 80 reliant la double bielle 72 à la lumière 82 du levier coudé 70 occupe la position la plus proche de l'axe d'articulation 76.In this configuration shown in Figure 5 and detailed in Figure 10, we see that the arrowhead 13 is overturned and occupies a position substantially moved away from main boom element 12 to leave pass the front tie 48, while the axis 80 connecting the double connecting rod 72 in the light 82 of the bent lever 70 occupies the position closest to the hinge pin 76.

    Dans un deuxième temps, en actionnant le vérin hydraulique à double effet 53-54 dans le sens rentrant, la tige 54 s'enfonce dans le corps 53 et la distance entre les deux articulations 55 et 56 portées respectivement par le premier élément intermédiaire de pliage de flèche 14 et par l'élément principal de flèche 12 se raccourcit. De ce fait, l'ensemble constitué des éléments de flèche 12, 15, 13 repliés pivote autour de l'articulation 35 de la flèche 10. En même temps, comme montré à la figure 6, le tirant avant 48 se détend en se pliant au niveau de son articulation 91 tandis que le poinçon avant 40 pivote vers l'arrière autour de son articulation 39 portée par le premier élément intermédiaire de pliage de flèche 14 jusqu'à venir en butée par son levier inférieur 41 sur les montants 42 du cadre 37 également porté par le premier élément intermédiaire de pliage de flèche 14. Le pivotement vers l'arrière du poinçon avant 40 provoque simultanément la détente du tirant de liaison 52 dont les éléments arrière 92, 93, 96 viennent reposer sur le tirant arrière 20 encore tendu en se centrant grâce au dispositif de guidage 95 de l'élément 93. En fin d'opération, lorsque le vérin hydraulique à double effet 53-54 est entièrement rentré, la flèche 10 se présente comme montré à la figure 7, c'est-à-dire avec l'élément principal de flèche 12 vertical se présentant perpendiculairement au premier élément intermédiaire de pliage de flèche 14 encore aligné avec le pied de flèche 11, tandis que la pointe de flèche 13 occupe, sous son poids propre, une position suspendue à son articulation 63 avec le second élément intermédiaire de pliage de flèche 15, et que le tirant avant 48 se présente replié, contre le poinçon avant 40 et contre la membrure supérieure 50 de l'élément principal de flèche 12, autour de son articulation 91.Secondly, by actuating the cylinder double-acting hydraulic 53-54 in the inward direction, the rod 54 sinks into body 53 and the distance between the two joints 55 and 56 carried respectively by the first intermediate boom folding element 14 and by the main arrow element 12 is shortened. From this done, the assembly consisting of the arrow elements 12, 15, 13 folded back pivots around the articulation 35 of the boom 10. At the same time, as shown in Figure 6, pulling it before 48 relaxes by bending at the level of its joint 91 while the front punch 40 pivots towards the rear around its articulation 39 carried by the first intermediate boom folding element 14 until it comes to a stop with its lower lever 41 on the uprights 42 of frame 37 also carried by the first arrow folding intermediate element 14. The pivoting backward of the front punch 40 causes simultaneously relaxing the tie rod 52 whose rear elements 92, 93, 96 come to rest on the tie rod rear 20 still stretched by centering thanks to the device 95 of element 93. At the end of the operation, when the 53-54 double-acting hydraulic cylinder is fully retracted, the arrow 10 appears as shown in the figure 7, i.e. with the main boom element 12 vertical occurring perpendicular to the first boom folding intermediate element 14 still aligned with the arrowhead 11, while the arrowhead 13 occupies, under his own weight, a position suspended from its articulation 63 with the second intermediate element arrow folding 15, and the front tie 48 is present folded, against the front punch 40 and against the upper chord 50 of the main boom member 12, around its articulation 91.

    Dans un troisième temps, en actionnant le vérin hydraulique à double effet 44-45 dans le sens rentrant, la tige 45 s'enfonce dans le corps 44 de ce vérin et la distance entre les articulations 46 et 47 portées respectivement par le pied de flèche 11 et par le premier élément intermédiaire de pliage de flèche 14 se raccourcit. De ce fait, l'ensemble constitué des éléments de flèche 14, 12, 15, 13 repliés pivote autour de l'articulation 34 de la flèche 10. En même temps le tirant de liaison 52 se replie et se raccourcit en prenant appui respectivement sur le corps 44 du vérin 44-45 par l'intermédiaire du diabolo en matière plastique porté par l'axe d'articulation 104 de l'élément 101 du tirant 52, sur la membrure supérieure 22 du pied de flèche 11 par l'intermédiaire du galet en matière plastique porté par l'axe d'articulation 102 entre les éléments 98, 101 du tirant 52, et sur le tirant 20 encore tendu par l'intermédiaire des galets en matière plastique portés par les axes d'articulation 97 et 100 des éléments 93 et 96 du tirant 52, tandis que les axes d'articulation 100 et 104 se déplacent respectivement le long des glissières 99 et 105 des éléments 98 et 103 de ce même tirant 52. Le fonctionnement du vérin 44-45 est arrêté lorsque la flèche 10 se trouve dans la position montrée à la figure 8, et détaillée à la figure 9, pour que le repliage de la grue dans son ensemble puisse s'effectuer normalement comme connu en soi en repliant le mât 6. Tandis que le mât 6 se replie, le poinçon arrière 24 pivote vers l'avant autour de son articulation 25, les tirants arrière 20 et de liaison 52 se replient ensemble et le pied de flèche 11 se rabat au-dessus du mat supérieur 8 en pivotant autour de son articulation 19. Lorsque le mât 6 et le pied de flèche 11 sont entièrement repliés, on actionne de nouveau le vérin hydraulique à double effet 44-45 dans le sens rentrant jusqu'à arriver à la position entièrement repliée de transport montrée à la figure 2.Thirdly, by actuating the cylinder double acting hydraulic 44-45 in the inward direction, the rod 45 is inserted into the body 44 of this jack and the distance between joints 46 and 47 carried respectively by the jib foot 11 and by the first boom 14 intermediate folding element shortens. Therefore, the set made up of the elements arrow 14, 12, 15, 13 folded swivels around the articulation 34 of the arrow 10. At the same time pulling it link 52 folds and shortens by taking support respectively on the body 44 of the cylinder 44-45 by through the plastic diabolo carried by the hinge pin 104 of the element 101 of the tie rod 52, on the upper chord 22 of the jib foot 11 by the plastic roller carried by the hinge pin 102 between the elements 98, 101 of the tie rod 52, and on tie rod 20 still stretched by through the plastic rollers carried by the axes of articulation 97 and 100 of the elements 93 and 96 of the pulling 52, while the articulation axes 100 and 104 move respectively along the slides 99 and 105 of elements 98 and 103 of this same drawing 52. The cylinder 44-45 operation is stopped when the arrow 10 is in the position shown in Figure 8, and detailed in figure 9, so that the folding of the crane as a whole can be carried out normally as known in itself by folding the mast 6. While the mast 6 is folds back, the rear punch 24 pivots forward around of its articulation 25, the rear tie rods 20 and of link 52 folds back together and the jib foot 11 flap above the upper mast 8 by pivoting around its articulation 19. When the mast 6 and the boom foot 11 are fully folded, the double acting hydraulic cylinder 44-45 in the direction retracting until reaching the fully folded position transport shown in figure 2.

    Il va de soi que, pour procéder au dépliage de la grue à partir de la position repliée de la figure 2, en particulier au dépliage de la flèche 10, on commande séquentiellement les manoeuvres inverses en passant par les phases illustrées aux figures 8 à 3.It goes without saying that, to unfold the crane from the folded position in Figure 2, particular to the unfolding of the arrow 10, we order sequentially the reverse maneuvers passing through the phases illustrated in Figures 8 to 3.

    On réalise ainsi une grue à montage automatisé dont le repliage de la flèche 10 s'effectue sur elle-même, en "spirale".This produces a self-erecting crane whose folding of the arrow 10 is carried out on itself, spiral".

    L'on ne s'éloignerait pas du cadre de l'invention :

    • par des modifications constructives de détail, concernant par exemple le sens de montage des vérins dont le corps et la tige peuvent être inversés, ou encore la structure des différents tirants ;
    • par une application du même principe à une grue à mât télescopique, et non pas à mât pliable ;
    • par l'utilisation d'un dispositif arrière de retenue autre que le tirant arrière de retenue décrit et représenté.
    We would not depart from the scope of the invention:
    • by constructive modifications of detail, concerning for example the direction of assembly of the jacks whose body and rod can be reversed, or even the structure of the different tie rods;
    • by applying the same principle to a crane with a telescopic mast, and not with a foldable mast;
    • by the use of a rear retaining device other than the rear retaining tie described and shown.

    Claims (9)

    1. Automated-erection crane with a jib which folds on itself, comprising a mast (6), notably a foldable mast in two parts (7, 8), one lower and the other upper, connected together by articulation about a horizontal shaft (9), or a telescopic mast, a jib (10) articulated (at 19) at the top of the mast (6), produced in several successive elements (11 to 15) articulated on each other (at 34, 35, 62, 63) at their bottom booms with main jib elements (11, 12, 13) of relatively great length and intermediate jib folding elements (14, 15) of relatively short length interposed between two main jib elements (11, 12, 13), the jib (10) being supported by a set of ties (20, 48, 52) and stanchions (40) connected to the top (23) of a rear rigid stanchion (24) itself articulated (at 25) at the top of the mast (6) or on the rear part of the jib (10), and a rear holding device (26) connecting the top (23) of the rear rigid stanchion (24) to the rear part of a rotating chassis (3) which is situated at the base of the mast (6) and which carries a balancing ballast (4), the lower part (7) of the mast (6) being articulated about a horizontal shaft (5) on the front of the rotating chassis (3), whilst a motorised member, such as a ram (23), controls the folding/unfolding or telescoping of the mast (6) and other motorised members (44-45, 53-54, 65-66) control the folding/unfolding of the jib (10), characterised in that the jib (10) comprises:
      a first main jib element referred to as the jib foot (11), of reduced height (h1) in its rear part,
      a first intermediate folding element (14), connected directly to the jib foot (11) by a motorised member (44-45) controlling the pivoting of this intermediate element (14) about its shaft (34) for articulation on the said jib foot (11), and carrying on top a front rigid stanchion (40),
      a second main jib element (12) with a length substantially equal to the length of the above-mentioned jib foot (11) and of reduced height (h2) in its rear part, connected directly to the first intermediate jib folding element (14) by a motorised member (53-54) controlling the pivoting of this main element (12) about its shaft (35) for articulation on the said intermediate jib folding element (14),
      a second intermediate jib folding element (15), connected directly to the above-mentioned main jib element (12) by a motorised member (65-66) controlling the pivoting of this second intermediate jib folding element (15) about its shaft (62) for articulation on the second main jib element (12), and carrying an assembly (69) for coupling the second main jib element (12) to a third main jib element (13) referred to as the jib point,
      the jib point (13), with a height (h3) adapted so that it comes to be housed in the space formed between the reduced-height rear part (h1) of the jib foot (11) ad the reduced-height rear part (h2) of the second main jib element (12) when the crane is in the folded position for its transportation.
      a foldable rear tie (20) connecting the jib foot (11) to the top (23) of the rear rigid stanchion (24),
      a foldable front tie (48) connecting the second main jib element (12) to the top (51) of the front rigid stanchion (40) carried by the first intermediate jib folding element (14), and
      a foldable connecting tie (52) connecting the top (51) of the front rigid stanchion (40) to the top (23) of the rear rigid stanchion (24).
    2. Automated-erection crane with a jib which can be folded on itself according to Claim 1, characterised in that the motorised members for folding/unfolding the jib (10) are double-acting hydraulic rams (44-45, 53-54, 65-66) whose body (44, 53, 65) is articulated on a jib element and whose rod (45, 54, 66) is articulated on the following or preceding adjacent jib element.
    3. Automated-erection crane with a jib which can be folded on itself according to Claim 2, characterised in that the first intermediate jib folding element (14) with two tops (29, 30) each connected by a double lateral triangulation (31, 32) to the bottom booms (33) of the said element (14) and connected together longitudinally by a beam (36) carrying, substantially at its middle, a cross member (38), supporting the front rigid stanchion (40) and forming the top part of a transverse frame (37) rigidly connecting the middle areas of the bottom booms (33), the first top (29) carrying the transverse articulation shaft (47) for the end of the rod (45) of the ram (44-45) controlling the pivoting of this first intermediate element (14) about its articulation shaft (34) on the jib foot (11), ad the second top (30) carrying the transverse articulation shaft (55) for the end of the body (53) of the ram (53-54) controlling the pivoting of the second main jib element (12) about its articulation (35) on this first intermediate element (14).
    4. Automated-erection crane with a jib which can be folded on itself according to Claim 3, characterised in that the front rigid stanchion (40) is articulated at its base about a transverse shaft (39) supported by the aforementioned cross member (38) of the first intermediate jib folding element (14) and has at its bottom part a lever (41) coming to bear on the uprights (42) on the frame (37) including the said cross member (38), enabling the said stanchion (40) to move away, according to the erection requirements, from its normal working position which is substantial perpendicular to the longitudinal direction of the jib (10) in the working position.
    5. Automated-erection crane with a jib which can be folded on itself according to any one of Claims 2 to 4, characterised in that the second intermediate jib folding element (15) has two tops (57, 58) offset longitudinally and connected by a double lateral triangulation (59, 60) to the bottom booms (61) of the said element (15), the first top (57), with a height substantially greater than that of the other top (58), receiving the transverse articulation shaft (68) for the end of the rod (66) of the ram (65-66) controlling the pivoting of this second intermediate jib folding element (15) about its articulation shaft (62) on the second main jib element (12) and the second top (58) receiving the articulation shaft (76) for the central member (70) of the coupling assembly (69) connecting the jib point (13) to the second main jib element (12).
    6. Automated-erection crane with a jib which can be folded on itself according to Claim 5, characterised in that the coupling assembly (69) with three articulated members (70, 71, 72) comprises a first single or multiple link (71), connecting a transverse articulation shaft (77) carried by the front part of the second main jib element (12) to an articulation shaft (78) carried by a first end of the central member (70), an angled lever (70) with two arms (73, 74) forming the said central member, whose elbow (75) receives the articulation (76) on the second top (58) of the second intermediate jib folding element (15), and a second single or multiple link (72) connecting a articulation shaft (80) passing through an aperture (82) provided at the other end of the central member (70) to a transverse articulation (81) carried by the rear part of the jib point (13).
    7. Automated-erection crane with a jib which can be folded on itself according to any one of Claims 1 to 6, characterised in that the foldable rear tie (20) connecting the jib foot (12) to the top (23) of the rear rigid stanchion (24) is formed, from rear to front, by two successive rigid elements (83, 84), namely: a first single element (83) having a length of the same order as the length of the rear rigid stanchion (24), and a second double element (84) having a length of the same order as that of the top boom (22) of the jib foot (11) situated underneath the rear tie (20), the two tie elements (83, 84) being connected together by a transverse articulation shaft which can be mounted in different holes (85) provided at the facing ends of the two tie elements (83, 84) in order to produce different working configurations: jib (10) substantially horizontal, jib (10) more or less raised.
    8. Automated-erection crane with a jib which can be folded on itself according to any one of Claims 1 to 7, characterised in that the foldable front tie (48) connecting the second main jib element (12) to the top (51) of the front rigid stanchion (40) carried by the first intermediate jib folding element (14) is formed from rear to front by three successive rigid elements (86, 87, 88), namely: a first double element (86) having a length of the same order as the length of the front rigid stanchion (40), a second single element (87) and a third single element (88) preferably connected together by two transverse articulation shafts (89, 90), one mounted without clearance and the other with clearance so as to allow a slight skew, the length of the assembly formed by these last two elements of the tie (87, 88) being of the same order as that of the part of the second main jib element (12) situated underneath the front tie (48), the first tie element (86) ad the second tie element (87) being connected together by a transverse articulation shaft which can be mounted in different holes (91) provided at the facing ends of the said tie elements (86, 87) in order to produce different working configurations: jib (10) substantially horizontal, jib (10) more or less raised.
    9. Automated-erection crane with a jib which can be folded on itself according to any one of Claims 2 to 8, characterised in that the foldable connecting tie (52) connecting the respective tops (23, 51) of the rear (24) and front (40) rigid stanchions is formed from rear to front by seven successive rigid elements (92, 93, 96, 98, 101, 103, 106), namely: a first single element (92) with a cross section in the shape of a U open in the direction external to the jib (10), a second single element (93) with a cross section in the shape of a U open in the direction of the jib (10) connected to the first element (92) by a transverse shaft (92) and having a guidance device (95) at its other end, a third single element (96) connected to the second element (93) by a transverse shaft (97) carrying a wheel, a fourth element (98) having in its rear part a longitudinal runner (99) through which there slides a transverse shaft (100), also carrying a wheel, connecting it to the third element (96), a fifth single element (101) connected to the fourth element (98) by a transverse shaft (102), also carrying a wheel, a sixth double element (103) connected to the fifth element (101) by a transverse shaft (104) carrying a twin-wheel unit and having at its front part a longitudinal runner (105), and a seventh single element (106) carrying two transverse shafts (107, 108) situated one in front of the other and passing through the above-mentioned runner (105).
    EP96420064A 1995-03-22 1996-02-27 Automatic erection for a crane with a foldable boom Expired - Lifetime EP0733584B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9503575 1995-03-22
    FR9503575A FR2732000B1 (en) 1995-03-22 1995-03-22 AUTOMATED MOUNT CRANE WITH FOLDABLE BOOM ON ITSELF

    Publications (2)

    Publication Number Publication Date
    EP0733584A1 EP0733584A1 (en) 1996-09-25
    EP0733584B1 true EP0733584B1 (en) 1999-04-28

    Family

    ID=9477455

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96420064A Expired - Lifetime EP0733584B1 (en) 1995-03-22 1996-02-27 Automatic erection for a crane with a foldable boom

    Country Status (7)

    Country Link
    EP (1) EP0733584B1 (en)
    CN (1) CN1138005A (en)
    AT (1) ATE179392T1 (en)
    DE (1) DE69602224T2 (en)
    ES (1) ES2132861T3 (en)
    FR (1) FR2732000B1 (en)
    RU (1) RU2161119C2 (en)

    Families Citing this family (27)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2761971B1 (en) * 1997-04-11 1999-05-28 Potain Sa AUTOMATED CRANE WITH FOLDABLE BOOM, WITH LATERAL FOLDING FOR TRANSPORT
    FR2790252B1 (en) 1999-02-26 2001-04-06 Potain Sa DEVICE FOR SIMULTANEOUS FOLDING OR FOLDING OF CRANE BOOM TIP ELEMENTS
    FR2792627B1 (en) * 1999-04-23 2001-06-01 Potain Sa CRANE WITH MULTI-FUNCTION BOOM
    ITMI20010116A1 (en) 2001-01-23 2002-07-23 San Marco Internat S R L TOWER CRANE WITH SELF-ASSEMBLING STRUCTURE WITH FOLDABLE AND REMOVABLE TOWER AND ARM WITH MULTIPLE PORTIONS
    ITMI20021957A1 (en) * 2002-09-16 2004-03-17 San Marco Internat S R L SELF-ASSEMBLING TOWER CRANE WITH FOLDABLE AND REMOVABLE TOWER AND ARM WITH MULTIPLE FOLDABLE PORTIONS
    ATE468299T1 (en) 2003-04-02 2010-06-15 Terex Demag Gmbh TWO-PIECE MAIN BOOM FOR A LATTICE MAST CRANE AND METHOD FOR ERECTING SAME
    US20090107945A1 (en) * 2005-07-29 2009-04-30 Franz Ehrenleitner Folding Boom
    DE202005012050U1 (en) 2005-08-01 2006-12-14 Liebherr-Werk Biberach Gmbh System for adjusting a jib of a crane
    FR2941444B1 (en) * 2009-01-29 2011-02-11 Manitowoc Crane Group France TOWER CRANE ARROW WITH FOLDING DEVICE
    DE102009008809A1 (en) 2009-02-11 2010-08-19 V & M Deutschland Gmbh Drawbar for the bracing of a crane jib
    CN102267671B (en) * 2010-06-04 2015-09-16 周杨 Crane arm
    CN102756978A (en) * 2012-07-20 2012-10-31 辽宁抚挖重工机械股份有限公司 Foldable arm of crawler crane
    CN103318781B (en) * 2012-11-01 2015-05-13 上海振华重工(集团)股份有限公司 Crane provided with folding arm and beams
    WO2014186906A1 (en) 2013-05-23 2014-11-27 Les Enceintes Acoustiques Unisson Inc. Foldable structural truss
    DE102015119379B3 (en) 2015-11-10 2017-03-30 Terex Global Gmbh Mobile crane and method for bending a main boom extension relative to a main boom of a mobile crane
    DE102015119381B3 (en) 2015-11-10 2017-04-27 Terex Global Gmbh Mobile crane and method for bending a main boom extension relative to a main boom of a mobile crane
    CN105584942A (en) * 2015-11-24 2016-05-18 徐州重型机械有限公司 Crane arm and crane
    DE102015120350B3 (en) 2015-11-24 2017-05-24 Terex Global Gmbh Mobile crane for bending a main boom extension relative to a main boom of a mobile crane
    DE102018115519B3 (en) * 2018-06-27 2019-09-12 Terex Global Gmbh Mobile crane with a movable adapter between main boom and main boom extension
    CN108821135B (en) * 2018-07-06 2019-10-01 泉州台商投资区嘉尚网络科技有限公司 A kind of hanging apparatus for Large-scale Wind Turbines installation
    CN108792964B (en) * 2018-07-06 2019-10-15 东海县咖萨克水晶有限公司 A kind of head mast device of wind power generating set lifting
    CN108821136B (en) * 2018-07-06 2019-09-27 泉州台商投资区嘉尚网络科技有限公司 A kind of hanging apparatus for large-scale wind driven generator fan blade set
    CN108792969B (en) * 2018-07-06 2019-09-13 广西南宁巨缘合工程机械有限公司 A kind of Lifting device of crane
    CN110963426A (en) * 2018-09-30 2020-04-07 徐工集团工程机械股份有限公司 Foldable deformation truss arm section, truss arm and crane
    CN110697436B (en) * 2019-10-16 2020-12-01 长沙理工大学 Horizontal rotation's folding arm conveyer
    ES2910102A1 (en) * 2020-11-09 2022-05-11 Saez Machinery S L Automated folding and deployed tower crane (Machine-translation by Google Translate, not legally binding)
    FR3123642B1 (en) 2021-06-07 2023-04-28 Manitowoc Crane Group France Self-erecting crane with configuration change operation control

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2368430A1 (en) * 1976-10-22 1978-05-19 Pingon Manubat Sa Folding crane jib - has main and second struts with tie ropes to inner and outer sections
    FR2550176B1 (en) * 1983-08-03 1985-10-11 Potain Sa FOLDING BOOM CRANE IN MULTIPLE ARTICULATED ELEMENTS
    FR2643625B2 (en) * 1988-09-20 1991-11-22 Potain Sa FOLDABLE CRANE WITH BOOM IN THREE ARTICULATED ARTICLES
    FR2682097A1 (en) * 1991-10-02 1993-04-09 Potain Sa AUTOMATED FOLDING BOOM FOR CRANE.
    FR2682096B1 (en) * 1991-10-02 1993-12-03 Potain AUTOMATICALLY FOLDABLE TOWER CRANE.

    Also Published As

    Publication number Publication date
    DE69602224D1 (en) 1999-06-02
    RU2161119C2 (en) 2000-12-27
    DE69602224T2 (en) 1999-11-11
    CN1138005A (en) 1996-12-18
    EP0733584A1 (en) 1996-09-25
    FR2732000A1 (en) 1996-09-27
    FR2732000B1 (en) 1997-05-30
    ES2132861T3 (en) 1999-08-16
    ATE179392T1 (en) 1999-05-15

    Similar Documents

    Publication Publication Date Title
    EP0733584B1 (en) Automatic erection for a crane with a foldable boom
    EP0536060B1 (en) Crane jib which folds automatically
    EP1364906B1 (en) Tower crane with foldable counter-jib
    FR2605619A1 (en) REPLIABLE MACHINE FOR HANDLING AND LIFTING LOADS
    EP1031530B1 (en) Device for simultaneously folding or unfolding elements of the tip of the crane-jib
    EP1301431B9 (en) Articulated jib crane
    EP0888997B1 (en) Mast foldable in three elements with folding/unfolding device for tower crane
    FR2550176A1 (en) Crane with multi-link folding outrigger
    EP0536061B1 (en) Automatically foldable tower crane
    EP2107033B1 (en) Boom of a tower crane with folding-unfolding mechanism
    EP1072553B1 (en) Folding device for a crane boom with nestable elements
    FR2643625A2 (en) FOLDING CRANE WITH THREE ARTICULATED ELEMENTS ONE TO THE OTHER
    FR2493818A1 (en) SELF-RACING CRANE EQUIPPED WITH DEPLOYABLE STABILIZING SUPPORTS AND MOBILE FORCE LEGS VERTICALLY ASSOCIATED WITH THEM, AND DEPLOYABLE SUPPORT SO REALIZED
    EP0870726B1 (en) Self erecting crane with a sideways foldable jib in the transport position
    EP0473518B1 (en) Self-erecting crane with laterally foldable jib
    EP0733583B1 (en) Self-erecting crane with laterally foldable jib
    EP1352870B1 (en) Device for erecting and unfolding the mast and for erecting the jib of a crane
    EP0873964B1 (en) Device for erecting the tower for a telescopic crane
    EP1057776B1 (en) Articulated jib crane
    EP1873114B1 (en) Transportable tower crane with a mobile ballast device
    FR2541559A1 (en) Tractor drawn folding seed sowing machine
    FR2518143A1 (en) Section for road bridge - comprises parallelepiped sections with end faces incorporating interengaging couplings
    FR2882621A1 (en) Windrower for tractor, has detachable draw bar comprising complimentary device connected to connection device for permitting installation of windrower on hitching device hitched to front or rear of tractor, in three points

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE CH DE DK ES GB IT LI NL PT SE

    17P Request for examination filed

    Effective date: 19960805

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    17Q First examination report despatched

    Effective date: 19981009

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE CH DE DK ES GB IT LI NL PT SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

    Effective date: 19990428

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19990428

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19990428

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19990428

    REF Corresponds to:

    Ref document number: 179392

    Country of ref document: AT

    Date of ref document: 19990515

    Kind code of ref document: T

    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: EP

    REF Corresponds to:

    Ref document number: 69602224

    Country of ref document: DE

    Date of ref document: 19990602

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19990728

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: PT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19990730

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2132861

    Country of ref document: ES

    Kind code of ref document: T3

    GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

    Effective date: 19990428

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: LI

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20000229

    Ref country code: CH

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20000229

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed
    REG Reference to a national code

    Ref country code: CH

    Ref legal event code: PL

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: BE

    Payment date: 20050309

    Year of fee payment: 10

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20060228

    BERE Be: lapsed

    Owner name: *POTAIN

    Effective date: 20060228

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20140128

    Year of fee payment: 19

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: ES

    Payment date: 20140221

    Year of fee payment: 19

    Ref country code: IT

    Payment date: 20140217

    Year of fee payment: 19

    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: R119

    Ref document number: 69602224

    Country of ref document: DE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20150227

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20150901

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20160329

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20150228