EP0635450B1 - Method and device for mounting the jibs of tower cranes - Google Patents

Method and device for mounting the jibs of tower cranes Download PDF

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Publication number
EP0635450B1
EP0635450B1 EP94420161A EP94420161A EP0635450B1 EP 0635450 B1 EP0635450 B1 EP 0635450B1 EP 94420161 A EP94420161 A EP 94420161A EP 94420161 A EP94420161 A EP 94420161A EP 0635450 B1 EP0635450 B1 EP 0635450B1
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EP
European Patent Office
Prior art keywords
jib
tie
counter
mounting
lifting
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EP94420161A
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German (de)
French (fr)
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EP0635450A1 (en
Inventor
Michel Lissandre
Yves Millet
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Manitowoc Crane Group France SAS
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Potain SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—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

Definitions

  • the present invention relates to a method for mounting the jibs of tower cranes and to a device for implementing the method.
  • This invention finds its application in particular in the mounting of the distributing jib and of the associated jib, constituting support of the counterweight, tower cranes used on construction sites of buildings and public works.
  • the distributing jib of such a crane generally has a symmetrical triangular cross section whose upper vertex corresponds to an upper member, while the two lower vertices correspond to lower members which form a raceway for a load distribution carriage on the site.
  • This distributing jib essentially consists of jib elements aligned and assembled together by means of broaching pins arranged at the ends of the upper member and lower members, and a retaining tie rod, formed from several parts assembled together end to end by means of broaching axes mounted perpendicular to the median plane of the boom, pulling whose front end is articulated at the upper chord of a jib element by means of a broaching axis also mounted perpendicular in the middle plane of the arrow.
  • the distributing jib is aligned and assembled on the ground with its tie resting on the upper frame in the direction of the jib foot element, then fitted with slings for lifting it using an auxiliary assembly machine, such as 'a mobile crane.
  • an auxiliary assembly machine such as 'a mobile crane.
  • the articulation of the boom foot is presented and stapled on the front face of the mast head or on the turning pivot.
  • a hauling is carried out between the free end of the tie rod and its point of attachment to the top of the mast head.
  • a winch or a cable puller the free end of the haulage is pulled, until it is possible to pin the tie rod on the top of the mast head.
  • the hauling operation is carried out at height and requires the intervention of one or more fitters in difficult working conditions, in particular in the event of wind or other bad weather, while the auxiliary assembly machine is immobilized during all this time, this machine being generally rented at a high cost.
  • the auxiliary mounting machine is used to raise the boom and its tie rod around the articulation of the boom foot until it is possible to make a broaching. between the free end of the tie waiting on the boom foot and the end of a strap of sufficient length waiting at the top of the mast head. The pinning being carried out, the boom is still lowered using the auxiliary mounting machine until the tie rod is aligned and in tension.
  • the mounting of the counter-jib is carried out in a manner similar to that of the distributing jib and consequently has the same drawbacks.
  • the object of the present invention is to remedy the drawbacks set out above, by providing a method for mounting the jibs of tower cranes and a device for implementing the method which improves safety and reduces the downtime of the auxiliary mounting machine.
  • the fact of initially raising the tie rod at a suitable height, above the distributing jib or the jib, makes it possible to present the jib or the jib in front of the mast head, in a configuration allowing assembly straight from the free end of this tie rod, thus making the current hauling system unnecessary.
  • the assembly can therefore be carried out more quickly and more easily, and consequently in better conditions of safety for the personnel and by immobilizing an auxiliary machine of assembly for a reduced time, resulting in significant savings.
  • this auxiliary mounting machine such as a hydraulic mobile crane is used both for raising and aligning the tie rod, the jib or the jib still on the ground, and for then lifting the entire jib or the counter-arrow with its tie rod kept raised and aligned, and its presentation in front of the masthead.
  • the device according to the invention for implementing the method defined above, comprises on the one hand at least one sling, or a set of slings, connecting a fixed point of the jib foot element, in the case of a distributing jib, or a fixed point of the counter-jib, at a fixed point of the tie rod, and capable of being suspended directly or indirectly from the hook of an auxiliary mounting machine, and on the other hand suspension means , of the lifting beam type, allowing the lifting of the whole of the distributing jib or of the counter-jib with its tie rod maintained raised and aligned, means supplementing the preceding elements being still provided for keeping the tie rods raised and aligned.
  • traction can be exerted first on the tie rod, to bring it into the raised position while the distributing jib or the counterjib still remains on the ground, before the whole of the distributing jib or the counterjib is lifted.
  • the device comprises, in addition to at least one sling connecting a fixed point of the foot element of arrow at a fixed point of the tie rod, a lifting punch whose first end is articulated to said fixed point of the tie rod, while its second end comprises support and guide means for its movement along the frame upper part of the boom foot element, means being further provided for stopping the punch in position straightened and to ensure its broaching on said frame in this position.
  • the second end of the lifting punch can carry a roller, capable of moving along the upper chord of the jib foot and, when the punch reaches its upright position, to come into contact with a stopper carried by said chord.
  • This punch is raised at the same time as the arrow rod, and by its rigidity it ensures the maintenance of the rod in the raised and aligned position, and during the lifting of the whole of the distributing arrow and its presentation in front of the mast head.
  • the tie rod of the distributing jib is produced in several successive parts, the respective lengths of which correspond substantially to those of the jib elements on which the parts of the tie rod are mounted during transport, the parts of this tie rod being joined together, during assembly. , by means of coupling rods.
  • this device also comprises a jib lifting beam comprising two fixing flanges on the upper frame of the distributing jib, one of which carries a rod of fixed length and the other carries a strap of adjustable length, to correct the slope of the distributing jib.
  • the rod of fixed length and the strap of adjustable length are positioned laterally on the respective flanges, by means of thickness washers arranged on either side of the pin axes of the rod and the strap on the respective flanges, to correct the cant of the distributing boom.
  • the lifting beam is used with the auxiliary lifting device, to lift the entire boom and the present in front of the masthead, after lifting the tie rod and the punch using the same auxiliary mounting device.
  • This lifter remains permanently attached to the distributor boom, in the region of the center of gravity thereof.
  • the device comprises a lifting beam, the midpoint of which serves for the suspension from the hook of an auxiliary machine of mounting, and two systems of slings fixed to the ends of the spreader and mounted on either side of the jib, each comprising a rear sling directly connecting the spreader to a fixed point of a member of the jib and a front sling in two parts, one of which connects the lifter to the tie-rod for lifting the tie-rod and the other connects the tie-rod to a fixed point on the frame of the jib for lifting the entire jib with its tie-rod raised.
  • a single assembly composed of slings and a lifter is used here for lifting the brace tie rod and for lifting the entire brace with its tie rod raised, the two operations being carried out directly one after the other on the other, without modifying the suspension point on the hook of the auxiliary mounting machine.
  • the broaching of the free ends of the tie rods at the top of the mast head is facilitated by the presence of lights, preferably provided at the free end of the tie rod on the side of the distributing jib, and on a coupling rod on the side of the jib.
  • the crane shown in FIG. 1 comprises, in a known manner, a fixed or rolling base frame 1, a mast 2 of adjustable height surmounted by a fixed pivot 3 supporting, by means of an orientation device 4, a rotary pivot 5 itself surmounted by a mast head 6.
  • This crane is provided with a distributing jib 7 and a counter-jib 8, with counterweight, each equipped with a device for the assembly according to the invention.
  • the boom 7 is equipped with a carriage 9 and a translation mechanism 10 of the carriage 9, as well as a lifting winch 11 for handling loads on the site; it is mounted articulated around a horizontal axis 12 on the front face of the mast head 6 or on the rotary pivot 5, and is maintained in a substantially horizontal position by means of a tie rod 13 linked at 14 to the top of said mast head 6.
  • This distributing arrow 7 of adjustable length comprises a foot element 15, one or more intermediate elements 16, a so-called tie-rod element 17 and one or more common elements 18 situated beyond the tie-down element - pulling 17.
  • the tie rod 13 of the distributing boom 7 is formed of several successive parts 19, 20, 21 whose respective lengths correspond substantially to those of the boom elements, more particularly the foot element 15, the intermediate element or elements 16 and the tie-rod element 17 limited to its part located under the tie-rod.
  • the various parts 19,20,21 of the tie rod 13 are arranged, for transport, above the corresponding arrow elements 15,16,17.
  • the intermediate parts 20 of the tie rod 13 are each composed, at the rear, of a very long element 22 of section circular terminated at its two ends by a yoke 23, and at the front, with a rod 24 provided with a handle 25, forming a tenon, assembled together by means of an axis 26 mounted perpendicular to the line of the tie rod 13 and in the median plane of the arrow 7.
  • the very long element 22 rests above the upper chord 27 of the intermediate arrow element 16 corresponding by means of a front support 28 provided with a retaining pin 29 and a rear support 30 provided with a broaching pin 31 on which it is positioned, while the link rod 24 is folded over the front end of said frame 27.
  • the front part 21 of the tie rod 13 is composed, at the rear, of a very long element 32 of circular section terminated at its front end by a lug 33 and at its rear end by a yoke 34, and at the front, by a double strap 35, forming a yoke, assembled together by means of a pin 36.
  • the double strap 35 is, moreover, assembled on the upper frame 37 of the tie-pull element. of arrow 17 at a gusset 38, forming a tenon, by means of an axis 39.
  • the axes 36 and 39 are also mounted perpendicular to the line of the tie rod 13 and to the median plane of the arrow 7. In the transport position , the very long element 32 rests above the upper chord 37 of the tie-rod element 17 of the arrow 7 by means of a rear support 40 provided with a retaining pin 41.
  • the rear part 19 of the tie rod 13 comprises, as shown in FIG. 2, two very long elements 42, 43 of circular section mounted in the extension of one another through a support 44, the upper part of which receives an axis 45 for hooking a sling 46 used for lifting the tie rod 13 of the distributing boom 7, while its lower part receives an axis 47 mounted perpendicular to the line of the tie rod 13 and median plane of the arrow 7 serving both for the assembly of said elements 42,43 and for the articulation of a punch 48 also serving for the lifting of said tie rod 13.
  • the ends assembled at 47 of elements of great length 42,43 respectively form a tenon 49 and a yoke 50 which abut one against the other by means of a support plate 51 when said elements 42,43 form an angle less than the flat angle.
  • the rear part 19 of the tie rod 13 further comprises at the front a link 52 provided with a handle 53, forming a tenon, for its assembly, by means of an axis 54 mounted perpendicular to the line of the tie rod 13 and to the median plane of arrow 7, at the front end of the set of two very long elements 42,43 forming a yoke 55.
  • the rear end of the set of two elements 42,43 forms a tenon 56 provided with a hole oblong 57 to facilitate assembly at 14 of the tie rod 13 at the top of the mast head 6.
  • the punch 48 articulated at one end at 47 at the tie rod 13 is provided at its other end with a roller 58 in the form of a diabolo capable of rolling on the upper member 59 of circular section of the boom foot element 15 - see also figure 2.
  • the punch 48 is folded down at the front under the rear part 19 of the tie rod 13 and the assembly of the two very long elements 42, 43 rests above the upper chord 59 of the foot element.
  • jib 15 by means of a front support 60 provided with a retaining or pinning axis 61 and a rear support 62 provided with a pinning axis 63, on which one or which it is positioned, while the rod 52 is folded over the front end of said frame 59.
  • the elements 15, 16, 17, 18 of the fully equipped boom 7 are aligned and assembled together on the ground.
  • the parts 19, 20, 21 of the tie rod 13 are then assembled by means of axes 64.65 mounted perpendicular to the line of the tie rod and to the median plane of the arrow 7 by connecting the links 52, 24 respectively to the yokes 23.34.
  • the boom 7 thus equipped is mounted on at least two easels 66.67 of sufficient height for the passage of the carriage 9 equipped.
  • the easel 66 is disposed at the rear of the jib foot 15, while the easel 67 is disposed in front of the jib 7, beyond the axis of assembly of the tie rod 13, to avoid tilting of the arrow 7 during the lifting of said tie rod 13.
  • the lifting punch 48 suspended at 47 in said tie rod 13 straightens by rolling, by means of its roller 58, on the upper member 59 of the jib foot element 15 - see FIG. 6.
  • a double retaining sling 70 connecting a double fixing point 71 located at the rear end of the jib foot element 15 to a axis 72 located at the top of the lifting punch 48 tends gradually.
  • the double retaining sling 70 is tensioned and the tie rod 13 is substantially aligned in the raised position, while the lower end of the lifting punch 48 abuts on an axis 73 secured to a fixed support 74. on the upper chord 59, substantially in the middle of the length of the jib foot element 15 - see FIGS. 2 and 7.
  • the lower end of the lifting punch 48 is locked by hand or automatically by means of an axis 75 on the support 74.
  • a lifting beam 76 is used such as that shown in FIG. 12.
  • the lifting beam 76 has two fixing flanges 77,78 on the upper member 79 of the arrow 7.
  • Each flange 77, 78 is formed by an upper stirrup 80 disposed on a node 81, 82 of the structure of the jib 7 and by two lower stirrups, respectively 83 and 84, arranged on either side. of node 81.82.
  • the lower stirrups 83 and 84 are assembled on the upper stirrup 80 using screws 87, 88.
  • flanges 77,78 Immobilization in rotation, around the upper member 79 of the arrow 7, flanges 77,78 is provided by pins 85 engaged in the bracing 86 of the arrow 7 through the lower stirrups 83,84.
  • Each upper stirrup 80 carries at its upper part a pin 89.90 mounted perpendicular to the median plane of the arrow 7.
  • the flange 77 takes up by its axis 89 a rod of fixed length 91 extended by a first lifting sling 92; washers 93 of different thicknesses are distributed on request on either side of the axis 89 between its supports on said flange 77 and the connecting rod 91.
  • the flange 78 takes up by its axis 90 a strap of adjustable length 94 extended by a second lifting sling 95; washers 96 of different thicknesses are also distributed on demand on either side of the axis 90.
  • the adjustable length strap 94 comprises an adjustable connecting rod 97 articulated at one end on the axis 90 and the body of which comprises several broaching holes 98, a binocular 99 centered at one end on a broaching hole 98 of the adjustable rod 97 and, if necessary, an extension rod 100 pinned at 101 at the other end of the binocular 99.
  • the slope of the arrow 7 is adjusted by adjusting the length of the strap 94, while its slope is corrected by the distribution of the washers 93 and 96 on either side of the axes 89 and 90. In principle, the adjustments are made once and for all for an arrow of given length.
  • the arrow 7 thus raised is presented for the assembly of the boom foot 15 on the front face of the mast head 6.
  • the assembly is carried out by means of two axes 12 connecting two gussets 102 forming tenons of the rotary pivot 5 to yokes 103 extending rearward the lower members 104 of the jib foot 15.
  • a guide device 105 of the angle type ensures the centering of the yokes 103 on the gussets 102 and facilitates the positioning of the axes 12.
  • the jib 8 shown in detail in FIG. 13 is mounted articulated at 110 on the rear face of the mast head 6 or of the pivoting pivot 5 at the same height as the distributing jib 7 and is maintained in a substantially horizontal position.
  • the tie rod 111 is composed of two very long elements 112 identical of circular section mounted symmetrically on either side of the jib 8 , and terminated at their two ends by yokes 113,114.
  • the rear yokes 113 are assembled on the members 115 at the gussets 116, forming tenons, by means of pins 117.
  • the front yokes 114 are assembled by means of pins 118 on a connecting element 119 consisting of two flat irons 120 folded at their base 121 forming a tenon and at their top 122 and joined by spacers 123 and 124.
  • the connecting element 119 is held in the extension of the elements of great length 112 by means of a support plate 125 between yokes 114 and tenons 121.
  • the device for implementing the method for mounting the jib 8 comprises a lifter 126, the midpoint 127 of which serves to hook the hook 68 of the auxiliary mounting device 69, and two identical sling systems fixed to the ends 128 of the spreader 126 and mounted on either side of the jib 8, each comprising a rear sling 129 directly connecting the end 128 of the spreader 126 to a fixing point 130 disposed at the rear of the corresponding member 115 of the jib 8 and a two-part front sling 131,132, of which the first part 131 connects the end 128 of the spreader 126 to a fixing point 133 of the tie rod 111 and the other part 132 connects a fixing point 134 of the tie rod 111 to a fixing point 135 disposed at the front of the corresponding frame 115 of the jib 8.
  • the jib 8 is assembled on the ground with its tie rod 111 folded over the members 115. With the aid of the hook 68 of the auxiliary mounting machine 69, the midpoint 127 of the spreader bar 126 is hooked, then the hook 68 is gradually raised.
  • the jib 8 with its tie rod 111 in the raised position is lifted at the level of the mast head 6 by means of the auxiliary mounting machine 69.
  • the jib 8 is presented and assembled at 110 on the rear face of the mast head 6 or of the rotary pivot 5, and the tie rod 111 is assembled at the top 106 of said mast head 6 by means of a connecting rod 136 provided with an oblong hole 137 to facilitate mounting an axis 138 - see figures 1 and 14.
  • the invention is applied to both the distributing jib 7 and the jib 8 of the same tower crane, in principle one proceeds first to the mounting of the jib 8, then possibly to the installation of a partial counterweight on the jib 8, and then in the mounting of the distributing jib 7.

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

Abstract

The invention relates to the mounting of the working jib (7) and of the associated counterbalancing jib (8) of tower cranes, used on building and civil engineering work construction sites. The jib elements (15,16,17,18) are aligned and assembled on the ground with their stay (13), then the jib stay (13) and, possibly, the one (111) belonging to the counterbalancing jib (8) is or are lifted up and aligned with the aid of an auxiliary item of mounting plant (69). Next, using the same item of plant (69), the whole of the jib (7) or of the counterbalancing jib (8) together with its stay (13,111) lifted up and aligned is raised and is offered up facing the top of the tower (6) so that the free ends (56,122) of the stays (13,111) are offered up correctly to the very top of the head of the tower (6) to allow direct connection (at 14,138). This method improves safety, and it decreases the duration for which the auxiliary item of mounting plant (69) is immobile. <IMAGE>

Description

La présente invention concerne un procédé pour le montage des flèches de grues à tour et un dispositif pour la mise en oeuvre du procédé. Cette invention trouve notamment son application dans le montage de la flèche distributrice et de la contreflèche associée, constituant support du contrepoids, des grues à tour utilisées sur les chantiers de construction de bâtiments et de travaux publics.The present invention relates to a method for mounting the jibs of tower cranes and to a device for implementing the method. This invention finds its application in particular in the mounting of the distributing jib and of the associated jib, constituting support of the counterweight, tower cranes used on construction sites of buildings and public works.

La flèche distributrice d'une telle grue a généralement une section transversale triangulaire symétrique dont le sommet supérieur correspond à une membrure supérieure, tandis que les deux sommets inférieurs correspondent à des membrures inférieures qui forment un chemin de roulement pour un chariot de distribution des charges sur le chantier. Cette flèche distributrice est constituée essentiellement d'éléments de flèche alignés et assemblés entre eux au moyen d'axes de brochage disposés aux extrémités de la membrure supérieure et des membrures inférieures, et d'un tirant de retenue, formé de plusieurs parties assemblées entre elles bout à bout au moyen d'axes de brochage montés perpendiculaires au plan médian de la flèche, tirant dont l'extrémité avant est articulée au niveau de la membrure supérieure d'un élément de flèche au moyen d'un axe de brochage monté également perpendiculaire au plan médian de la flèche.The distributing jib of such a crane generally has a symmetrical triangular cross section whose upper vertex corresponds to an upper member, while the two lower vertices correspond to lower members which form a raceway for a load distribution carriage on the site. This distributing jib essentially consists of jib elements aligned and assembled together by means of broaching pins arranged at the ends of the upper member and lower members, and a retaining tie rod, formed from several parts assembled together end to end by means of broaching axes mounted perpendicular to the median plane of the boom, pulling whose front end is articulated at the upper chord of a jib element by means of a broaching axis also mounted perpendicular in the middle plane of the arrow.

Le montage d'une telle flèche s'effectue généralement de la façon suivante :The mounting of such a boom is generally carried out as follows:

La flèche distributrice est alignée et assemblée au sol avec son tirant reposant sur la membrure supérieure en direction de l'élément de pied de flèche, puis équipée d'élingues pour son levage à l'aide d'un engin auxiliaire de montage, tel qu'une grue mobile. En fin de levage, l'articulation du pied de flèche est présentée et brochée sur la face avant de la tête de mât ou sur le pivot tournant.The distributing jib is aligned and assembled on the ground with its tie resting on the upper frame in the direction of the jib foot element, then fitted with slings for lifting it using an auxiliary assembly machine, such as 'a mobile crane. At the end of lifting, the articulation of the boom foot is presented and stapled on the front face of the mast head or on the turning pivot.

Suivant une première façon d'opérer, la flèche étant maintenue en position par l'engin auxiliaire de montage, on réalise un mouflage entre l'extrémité libre du tirant et son point de fixation au sommet de la tête de mât. A l'aide d'un treuil ou d'un tire-câble, on tire sur le brin libre du mouflage, jusqu'à ce que l'on puisse réaliser le brochage du tirant sur le sommet de la tête de mât.According to a first way of operating, the arrow being held in position by the auxiliary mounting machine, a hauling is carried out between the free end of the tie rod and its point of attachment to the top of the mast head. Using a winch or a cable puller, the free end of the haulage is pulled, until it is possible to pin the tie rod on the top of the mast head.

L'opération de mouflage s'effectue en hauteur et nécessite l'intervention d'un ou plusieurs monteurs dans des conditions de travail difficiles, notamment en cas de vent ou d'autres intempéries, tandis que l'engin auxiliaire de montage est immobilisé pendant tout ce temps, cet engin étant généralement loué à un coût élevé.The hauling operation is carried out at height and requires the intervention of one or more fitters in difficult working conditions, in particular in the event of wind or other bad weather, while the auxiliary assembly machine is immobilized during all this time, this machine being generally rented at a high cost.

Suivant une autre façon d'opérer, encore plus délicate, on se sert de l'engin auxiliaire de montage pour relever la flèche et son tirant autour de l'articulation du pied de flèche jusqu'à ce que l'on puisse effectuer un brochage entre l'extrémité libre du tirant en attente sur le pied de flèche et l'extrémité d'une bretelle de longueur suffisante en attente au sommet de la tête de mât. Le brochage étant réalisé, on abaisse la flèche toujours à l'aide de l'engin auxiliaire de montage jusqu'à ce que le tirant soit aligné et en tension.According to another, even more delicate way of operating, the auxiliary mounting machine is used to raise the boom and its tie rod around the articulation of the boom foot until it is possible to make a broaching. between the free end of the tie waiting on the boom foot and the end of a strap of sufficient length waiting at the top of the mast head. The pinning being carried out, the boom is still lowered using the auxiliary mounting machine until the tie rod is aligned and in tension.

Le montage de la contreflèche s'effectue d'une manière analogue à celle de la flèche distributrice et présente en conséquence les mêmes inconvénients.The mounting of the counter-jib is carried out in a manner similar to that of the distributing jib and consequently has the same drawbacks.

En ce qui concerne l'état de la technique précédemment décrit, il est fait référence à la notice de montage-démontage POTAIN N° 2S.5.010.18, éditée le 10.04.89.With regard to the state of the art previously described, reference is made to the POTAIN assembly-disassembly instructions No. 2S.5.010.18, published on 10.04.89.

La présente invention a pour but de remédier aux inconvénients exposés ci-dessus, en fournissant un procédé pour le montage des flèches de grues à tour et un dispositif pour la mise en oeuvre du procédé qui améliorent la sécurité et diminuent la durée d'immobilisation de l'engin auxiliaire de montage.The object of the present invention is to remedy the drawbacks set out above, by providing a method for mounting the jibs of tower cranes and a device for implementing the method which improves safety and reduces the downtime of the auxiliary mounting machine.

A cet effet, le procédé pour le montage des flèches de grues à tour selon l'invention consiste, pour le montage d'une flèche distributrice, et aussi éventuellement d'une contreflèche, pourvue d'un tirant de retenue dont une extrémité est articulée à un élément de flèche ou à la contreflèche, et dont l'autre extrémité, initialement libre, est prévue pour être liée par brochage au sommet de la tête de mât de la grue :

  • à aligner et assembler au sol les éléments de flèche avec leur tirant rabattu ;
  • à relever et aligner le tirant de la flèche et, éventuellement, celui de la contreflèche, se trouvant encore au sol, de telle façon que l'extrémité libre du tirant soit placée et maintenue en hauteur au-dessus de la flèche ou de la contreflèche, pour que cette extrémité libre se présente ensuite correctement en vue d'un brochage direct au sommet de la tête de mât,
  • à lever l'ensemble de la flèche ou de la contreflèche avec son tirant maintenu relevé et aligné,
  • à présenter, en fin de levage, la flèche ou la contreflèche en face de la tête de mât,
  • à assembler la flèche ou la contreflèche à la base de la tête de mât, et
  • à brocher directement l'extrémité libre du tirant de la flèche ou de la contreflèche au sommet de la tête de mât.
To this end, the method for mounting the jibs of tower cranes according to the invention consists, for the assembly of a distributing jib, and also optionally of a jib, provided with a retaining tie rod, one end of which is articulated to a jib element or to the jib, the other end of which, initially free, is intended to be linked by pinning to the top of the crane's mast head:
  • aligning and assembling the jib elements on the ground with their tie down;
  • to raise and align the tie rod and, if necessary, that of the jib, still on the ground, so that the free end of the tie rod is placed and maintained in height above the jib or jib , so that this free end is then presented correctly for direct pinout at the top of the mast head,
  • to lift the whole of the jib or the jib with its tie rod kept raised and aligned,
  • to present, at the end of lifting, the jib or counter-jib in front of the mast head,
  • to assemble the jib or the jib at the base of the masthead, and
  • to directly pin the free end of the tie rod or jib at the top of the mast head.

Comme on le conçoit aisément, le fait de relever initialement le tirant à une hauteur convenable, au-dessus de la flèche distributrice ou de la contreflèche, permet de présenter la flèche ou la contreflèche devant la tête de mât, dans une configuration permettant un assemblage direct de l'extrémité libre de ce tirant, rendant ainsi inutile le système actuel de mouflage. Le montage peut donc s'effectuer plus rapidement et plus aisément, et par conséquent dans de meilleures conditions de sécurité pour le personnel et en immobilisant un engin auxiliaire de montage pendant un temps réduit, d'où une économie appréciable.As is easily understood, the fact of initially raising the tie rod at a suitable height, above the distributing jib or the jib, makes it possible to present the jib or the jib in front of the mast head, in a configuration allowing assembly straight from the free end of this tie rod, thus making the current hauling system unnecessary. The assembly can therefore be carried out more quickly and more easily, and consequently in better conditions of safety for the personnel and by immobilizing an auxiliary machine of assembly for a reduced time, resulting in significant savings.

Avantageusement, cet engin auxiliaire de montage tel que grue mobile hydraulique est utilisé aussi bien pour relever et aligner le tirant, la flèche ou la contreflèche se trouvant encore au sol, que pour effectuer ensuite le levage de l'ensemble de la flèche ou de la contreflèche avec son tirant maintenu relevé et aligné, et sa présentation devant la tête de mât.Advantageously, this auxiliary mounting machine such as a hydraulic mobile crane is used both for raising and aligning the tie rod, the jib or the jib still on the ground, and for then lifting the entire jib or the counter-arrow with its tie rod kept raised and aligned, and its presentation in front of the masthead.

Le dispositif selon l'invention, pour la mise en oeuvre du procédé défini ci-dessus, comprend d'une part au moins une élingue, ou un ensemble d'élingues, reliant un point fixe de l'élément de pied de flèche, dans le cas d'une flèche distributrice, ou un point fixe de la contreflèche, à un point fixe du tirant, et apte à être suspendu directement ou indirectement au crochet d'un engin auxiliaire de montage, et d'autre part des moyens de suspension, du genre palonnier, permettant le levage de l'ensemble de la flèche distributrice ou de la contreflèche avec son tirant maintenu relevé et aligné, des moyens complétant les élements précédents étant encore prévus pour maintenir les tirants relevés et alignés. Ainsi une traction peut être exercée d'abord sur le tirant, pour l'amener en position relevée alors que la flèche distributrice ou la contreflèche reste encore au sol, avant que l'ensemble de la flèche distributrice ou de la contreflèche soit levé.The device according to the invention, for implementing the method defined above, comprises on the one hand at least one sling, or a set of slings, connecting a fixed point of the jib foot element, in the case of a distributing jib, or a fixed point of the counter-jib, at a fixed point of the tie rod, and capable of being suspended directly or indirectly from the hook of an auxiliary mounting machine, and on the other hand suspension means , of the lifting beam type, allowing the lifting of the whole of the distributing jib or of the counter-jib with its tie rod maintained raised and aligned, means supplementing the preceding elements being still provided for keeping the tie rods raised and aligned. Thus traction can be exerted first on the tie rod, to bring it into the raised position while the distributing jib or the counterjib still remains on the ground, before the whole of the distributing jib or the counterjib is lifted.

Selon un mode de réalisation préféré du dispositif, concernant la mise en oeuvre du procédé pour le montage de la flèche distributrice d'une grue à tour, celui-ci comprend, outre au moins une élingue reliant un point fixe de l'élément de pied de flèche à un point fixe du tirant, un poinçon relevable dont une première extrémité est articulée audit point fixe du tirant, tandis que sa seconde extrémité comporte des moyens d'appui et de guidage pour son déplacement le long de la membrure supérieure de l'élément de pied de flèche, des moyens étant prévus en outre pour arrêter le poinçon en position redressée et pour assurer son brochage sur ladite membrure dans cette position. La seconde extrémité du poinçon relevable peut porter un galet de roulement, susceptible de se déplacer le long de la membrure supérieure du pied de flèche et, lorsque le poinçon atteint sa position redressée, de venir en contact avec un butoir porté par ladite membrure. Ce poinçon se relève en même temps que le tirant de flèche, et par sa rigidité il assure le maintien du tirant en position relevée et alignée, et pendant le levage de l'ensemble de la flèche distributrice et sa présentation devant la tête de mât.According to a preferred embodiment of the device, concerning the implementation of the method for mounting the distribution boom of a tower crane, it comprises, in addition to at least one sling connecting a fixed point of the foot element of arrow at a fixed point of the tie rod, a lifting punch whose first end is articulated to said fixed point of the tie rod, while its second end comprises support and guide means for its movement along the frame upper part of the boom foot element, means being further provided for stopping the punch in position straightened and to ensure its broaching on said frame in this position. The second end of the lifting punch can carry a roller, capable of moving along the upper chord of the jib foot and, when the punch reaches its upright position, to come into contact with a stopper carried by said chord. This punch is raised at the same time as the arrow rod, and by its rigidity it ensures the maintenance of the rod in the raised and aligned position, and during the lifting of the whole of the distributing arrow and its presentation in front of the mast head.

Avantageusement, le tirant de la flèche distributrice est réalisé en plusieurs parties successives, dont les longueurs respectives correspondent sensiblement à celles des éléments de flèche sur lesquels les parties du tirant sont montées au transport, les parties de ce tirant étant réunies entre elles, au montage, au moyen de biellettes d'accouplement.Advantageously, the tie rod of the distributing jib is produced in several successive parts, the respective lengths of which correspond substantially to those of the jib elements on which the parts of the tie rod are mounted during transport, the parts of this tie rod being joined together, during assembly. , by means of coupling rods.

Selon une autre caractéristique, concernant toujours le dispositif selon l'invention appliqué à la flèche distributrice d'une grue à tour, ce dispositif comprend en outre un palonnier de levage de flèche comportant deux brides de fixation sur la membrure supérieure de la flèche distributrice, dont l'une porte une bielle de longueur fixe et l'autre porte une bretelle de longueur réglable, pour corriger la pente de la flèche distributrice.According to another characteristic, still concerning the device according to the invention applied to the distributing jib of a tower crane, this device also comprises a jib lifting beam comprising two fixing flanges on the upper frame of the distributing jib, one of which carries a rod of fixed length and the other carries a strap of adjustable length, to correct the slope of the distributing jib.

Suivant une caractéristique complémentaire, la bielle de longueur fixe et la bretelle de longueur réglable sont positionnées latéralement sur les brides respectives, au moyen de rondelles d'épaisseur disposées de part et d'autre des axes de brochage de la bielle et de la bretelle sur les brides respectives, pour corriger le dévers de la flèche distributrice.According to an additional characteristic, the rod of fixed length and the strap of adjustable length are positioned laterally on the respective flanges, by means of thickness washers arranged on either side of the pin axes of the rod and the strap on the respective flanges, to correct the cant of the distributing boom.

Le palonnier est utilisé avec l'engin auxiliaire de levage, pour lever l'ensemble de la flèche et la présenter devant la tête de mât, après avoir procédé au relevage du tirant et du poinçon à l'aide du même engin auxiliaire de montage. Ce palonnier reste fixé à demeure sur la flèche distributrice, dans la région du centre de gravité de celle-ci.The lifting beam is used with the auxiliary lifting device, to lift the entire boom and the present in front of the masthead, after lifting the tie rod and the punch using the same auxiliary mounting device. This lifter remains permanently attached to the distributor boom, in the region of the center of gravity thereof.

Selon une autre forme de réalisation du dispositif selon l'invention, plus spécialement adaptée au montage de la contreflèche d'une grue à tour, le dispositif comprend un palonnier, dont le point milieu sert à la suspension au crochet d'un engin auxiliaire de montage, et deux systèmes d'élingues fixés aux extrémités du palonnier et montés de part et d'autre de la contreflèche, comportant chacun une élingue arrière reliant directement le palonnier à un point fixe d'une membrure de la contreflèche et une élingue avant en deux parties dont l'une relie le palonnier au tirant pour le relevage du tirant et l'autre relie le tirant à un point fixe de la membrure de la contreflèche pour le levage de l'ensemble de la contreflèche avec son tirant relevé. Ainsi, un seul ensemble composé d'élingues et d'un palonnier sert ici au relevage du tirant de la contreflèche et au levage de l'ensemble de la contreflèche avec son tirant relevé, les deux opérations se faisant directement l'une à la suite de l'autre, sans modifier le point de suspension au crochet de l'engin auxiliaire de montage.According to another embodiment of the device according to the invention, more particularly adapted to the mounting of the jib of a tower crane, the device comprises a lifting beam, the midpoint of which serves for the suspension from the hook of an auxiliary machine of mounting, and two systems of slings fixed to the ends of the spreader and mounted on either side of the jib, each comprising a rear sling directly connecting the spreader to a fixed point of a member of the jib and a front sling in two parts, one of which connects the lifter to the tie-rod for lifting the tie-rod and the other connects the tie-rod to a fixed point on the frame of the jib for lifting the entire jib with its tie-rod raised. Thus, a single assembly composed of slings and a lifter is used here for lifting the brace tie rod and for lifting the entire brace with its tie rod raised, the two operations being carried out directly one after the other on the other, without modifying the suspension point on the hook of the auxiliary mounting machine.

Suivant un autre aspect de l'invention, le brochage des extrémités libres des tirants au sommet de la tête de mât est facilité par la présence de lumières, de préférence prévues à l'extrémité libre du tirant du côté de la flèche distributrice, et sur une bielle d'accouplement du côté de la contreflèche.According to another aspect of the invention, the broaching of the free ends of the tie rods at the top of the mast head is facilitated by the presence of lights, preferably provided at the free end of the tie rod on the side of the distributing jib, and on a coupling rod on the side of the jib.

De toute façon, l'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé qui, à titre d'exemples non limitatifs, illustre un mode de mise en oeuvre du procédé pour le montage des flèches de grues à tour, et représente des formes d'exécution du dispositif pour la mise en oeuvre de ce procédé.

  • Figure 1 est une vue d'ensemble à l'état monté d'une grue à tour, à laquelle s'applique le procédé selon l'invention ;
  • Figure 2 est une vue en perspective de l'élément de pied de flèche portant le dispositif servant à relever et aligner le tirant de retenue, pour la mise en oeuvre du procédé selon l'invention dans le cas d'une flèche distributrice ;
  • Figure 3 est une vue en perspective d'un élément intermédiaire de flèche montrant la disposition de la partie du tirant correspondante en position de transport ;
  • Figure 4 est une vue en perspective de l'élément attache-tirant de la flèche distributrice ;
  • Figures 5, 6 et 7 illustrent trois phases successives du relevage et de l'alignement du tirant de flèche ;
  • Figure 8 illustre l'opération de levage de l'ensemble de la flèche distributrice avec son tirant relevé ;
  • Figures 9 et 10 illustrent, en perspective et de façon détaillée, la présentation de la flèche pour son montage sur la tête de mât ;
  • Figure 11 est une vue de détail en perspective du poinçon servant au relevage et à l'alignement du tirant de la flèche distributrice ;
  • Figure 12 est une vue d'ensemble en perspective du palonnier servant au levage de l'ensemble de la flèche distributrice ;
  • Figure 13 est une vue d'ensemble en perspective du dispositif pour la mise en oeuvre du procédé selon l'invention pour le montage de la contreflèche ;
  • Figure 14 est une vue de détail en perspective de la partie haute de la tête de mât de la grue.
In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended diagrammatic drawing which, by way of nonlimiting examples, illustrates an embodiment of the method for mounting the arrows tower cranes, and represents embodiments of the device for implementing this method.
  • Figure 1 is an overall view in the assembled state of a tower crane, to which the method according to the invention applies;
  • Figure 2 is a perspective view of the boom foot element carrying the device for lifting and aligning the retaining tie, for the implementation of the method according to the invention in the case of a distributing boom;
  • Figure 3 is a perspective view of an intermediate boom element showing the arrangement of the corresponding part of the tie rod in the transport position;
  • Figure 4 is a perspective view of the tie-pulling element of the dispensing arrow;
  • Figures 5, 6 and 7 illustrate three successive phases of the lifting and alignment of the tie rod;
  • Figure 8 illustrates the lifting operation of the entire distributing boom with its tie rod raised;
  • Figures 9 and 10 illustrate, in perspective and in detail, the presentation of the boom for mounting on the mast head;
  • Figure 11 is a detailed perspective view of the punch for lifting and aligning the tie rod of the distributing arrow;
  • Figure 12 is an overall perspective view of the lifter for lifting the assembly of the distributor boom;
  • Figure 13 is an overall perspective view of the device for the implementation of the method according to the invention for mounting the jib;
  • Figure 14 is a detailed perspective view of the upper part of the crane mast head.

La grue représentée à la figure 1 comprend, de façon connue, un châssis de base fixe ou roulant 1, un mât 2 de hauteur ajustable surmonté d'un pivot fixe 3 supportant, par l'intermédiaire d'un dispositif d'orientation 4, un pivot tournant 5 lui-même surmonté d'une tête de mât 6. Cette grue est pourvue d'une flèche distributrice 7 et d'une contreflèche 8, avec contrepoids, équipées l'une et l'autre d'un dispositif pour le montage selon l'invention.The crane shown in FIG. 1 comprises, in a known manner, a fixed or rolling base frame 1, a mast 2 of adjustable height surmounted by a fixed pivot 3 supporting, by means of an orientation device 4, a rotary pivot 5 itself surmounted by a mast head 6. This crane is provided with a distributing jib 7 and a counter-jib 8, with counterweight, each equipped with a device for the assembly according to the invention.

La flèche 7 est équipée d'un chariot 9 et d'un mécanisme de translation 10 du chariot 9, ainsi que d'un treuil de levage 11 pour la manutention de charges sur le chantier ; elle est montée articulée autour d'un axe horizontal 12 sur la face avant de la tête de mât 6 ou sur le pivot tournant 5, et est maintenue en position sensiblement horizontale par l'intermédiaire d'un tirant 13 lié en 14 au sommet de ladite tête de mât 6. Cette flèche distributrice 7 de longueur ajustable comprend un élément de pied 15, un ou plusieurs éléments intermédiaires 16, un élément dit attache-tirant 17 et un ou plusieurs éléments courants 18 situés au-delà de l'élément attache-tirant 17.The boom 7 is equipped with a carriage 9 and a translation mechanism 10 of the carriage 9, as well as a lifting winch 11 for handling loads on the site; it is mounted articulated around a horizontal axis 12 on the front face of the mast head 6 or on the rotary pivot 5, and is maintained in a substantially horizontal position by means of a tie rod 13 linked at 14 to the top of said mast head 6. This distributing arrow 7 of adjustable length comprises a foot element 15, one or more intermediate elements 16, a so-called tie-rod element 17 and one or more common elements 18 situated beyond the tie-down element - pulling 17.

Le tirant 13 de la flèche distributrice 7 est formé de plusieurs parties successives 19,20,21 dont les longueurs respectives correspondent sensiblement à celles des éléments de flèche, plus particulièrement l'élément de pied 15, le ou les éléments intermédiaires 16 et l'élément attache-tirant 17 limité à sa partie située sous le tirant.The tie rod 13 of the distributing boom 7 is formed of several successive parts 19, 20, 21 whose respective lengths correspond substantially to those of the boom elements, more particularly the foot element 15, the intermediate element or elements 16 and the tie-rod element 17 limited to its part located under the tie-rod.

Comme montré aux figures 2, 3 et 4, les différentes parties 19,20,21 du tirant 13 sont disposées, pour le transport, au-dessus des éléments de flèche 15,16,17 correspondants.As shown in Figures 2, 3 and 4, the various parts 19,20,21 of the tie rod 13 are arranged, for transport, above the corresponding arrow elements 15,16,17.

En se référant à la figure 3, les parties intermédiaires 20 du tirant 13 sont composées chacune, à l'arrière, d'un élément de grande longueur 22 de section circulaire terminé à ses deux extrémités par une chape 23, et à l'avant, d'une biellette 24 munie d'une poignée 25, formant tenon, assemblés entre eux au moyen d'un axe 26 monté perpendiculaire à la ligne du tirant 13 et au plan médian de la flèche 7. En position de transport, l'élément de grande longueur 22 repose au-dessus de la membrure supérieure 27 de l'élément intermédiaire de flèche 16 correspondant au moyen d'un support avant 28 muni d'un axe de retenue 29 et d'un support arrière 30 muni d'un axe de brochage 31 sur lequel il vient se positionner, tandis que la biellette 24 est rabattue sur l'extrémité avant de ladite membrure 27.Referring to Figure 3, the intermediate parts 20 of the tie rod 13 are each composed, at the rear, of a very long element 22 of section circular terminated at its two ends by a yoke 23, and at the front, with a rod 24 provided with a handle 25, forming a tenon, assembled together by means of an axis 26 mounted perpendicular to the line of the tie rod 13 and in the median plane of the arrow 7. In the transport position, the very long element 22 rests above the upper chord 27 of the intermediate arrow element 16 corresponding by means of a front support 28 provided with a retaining pin 29 and a rear support 30 provided with a broaching pin 31 on which it is positioned, while the link rod 24 is folded over the front end of said frame 27.

Comme montré sur la figure 4, la partie avant 21 du tirant 13 est composée, à l'arrière, d'un élément de grande longueur 32 de section circulaire terminé à son extrémité avant par un tenon 33 et à son extrémité arrière par une chape 34, et à l'avant, par une bretelle double 35, formant chape, assemblés entre eux au moyen d'un axe 36. La bretelle double 35 est, par ailleurs, assemblée sur la membrure supérieure 37 de l'élément attache-tirant de flèche 17 au niveau d'un gousset 38, formant tenon, au moyen d'un axe 39. Les axes 36 et 39 sont montés également perpendiculaires à la ligne du tirant 13 et au plan médian de la flèche 7. En position de transport, l'élément de grande longueur 32 repose au-dessus de la membrure supérieure 37 de l'élément attache-tirant 17 de la flèche 7 au moyen d'un support arrière 40 muni d'un axe de retenue 41.As shown in FIG. 4, the front part 21 of the tie rod 13 is composed, at the rear, of a very long element 32 of circular section terminated at its front end by a lug 33 and at its rear end by a yoke 34, and at the front, by a double strap 35, forming a yoke, assembled together by means of a pin 36. The double strap 35 is, moreover, assembled on the upper frame 37 of the tie-pull element. of arrow 17 at a gusset 38, forming a tenon, by means of an axis 39. The axes 36 and 39 are also mounted perpendicular to the line of the tie rod 13 and to the median plane of the arrow 7. In the transport position , the very long element 32 rests above the upper chord 37 of the tie-rod element 17 of the arrow 7 by means of a rear support 40 provided with a retaining pin 41.

La partie arrière 19 du tirant 13 comprend, comme montré sur la figure 2, deux éléments de grande longueur 42,43 de section circulaire montés dans le prolongement l'un de l'autre au travers d'un support 44 dont la partie supérieure reçoit un axe 45 pour l'accrochage d'une élingue 46 servant au relevage du tirant 13 de la flèche distributrice 7, tandis que sa partie inférieure reçoit un axe 47 monté perpendiculaire à la ligne du tirant 13 et au plan médian de la flèche 7 servant à la fois à l'assemblage desdits éléments 42,43 et à l'articulation d'un poinçon 48 servant également au relevage dudit tirant 13. Les extrémités assemblées en 47 des éléments de grande longueur 42,43 forment respectivement un tenon 49 et une chape 50 qui viennent en butée l'un contre l'autre par l'intermédiaire d'un plat d'appui 51 lorsque lesdits éléments 42,43 forment un angle inférieur à l'angle plat. La partie arrière 19 du tirant 13 comprend encore à l'avant une biellette 52 munie d'une poignée 53, formant tenon, pour son assemblage, au moyen d'un axe 54 monté perpendiculaire à la ligne du tirant 13 et au plan médian de la flèche 7, à l'extrémité avant de l'ensemble des deux éléments de grande longueur 42,43 formant une chape 55. L'extrémité arrière de l'ensemble des deux éléments 42,43 forme un tenon 56 pourvu d'un trou oblong 57 pour faciliter l'assemblage en 14 du tirant 13 au sommet de la tête de mât 6.The rear part 19 of the tie rod 13 comprises, as shown in FIG. 2, two very long elements 42, 43 of circular section mounted in the extension of one another through a support 44, the upper part of which receives an axis 45 for hooking a sling 46 used for lifting the tie rod 13 of the distributing boom 7, while its lower part receives an axis 47 mounted perpendicular to the line of the tie rod 13 and median plane of the arrow 7 serving both for the assembly of said elements 42,43 and for the articulation of a punch 48 also serving for the lifting of said tie rod 13. The ends assembled at 47 of elements of great length 42,43 respectively form a tenon 49 and a yoke 50 which abut one against the other by means of a support plate 51 when said elements 42,43 form an angle less than the flat angle. The rear part 19 of the tie rod 13 further comprises at the front a link 52 provided with a handle 53, forming a tenon, for its assembly, by means of an axis 54 mounted perpendicular to the line of the tie rod 13 and to the median plane of arrow 7, at the front end of the set of two very long elements 42,43 forming a yoke 55. The rear end of the set of two elements 42,43 forms a tenon 56 provided with a hole oblong 57 to facilitate assembly at 14 of the tie rod 13 at the top of the mast head 6.

Comme montré en détail à la figure 11, le poinçon 48 articulé à une extrémité en 47 au tirant 13 est muni à son autre extrémité d'un galet 58 en forme de diabolo susceptible de rouler sur la membrure supérieure 59 de section circulaire de l'élément de pied de flèche 15 - voir aussi figure 2.As shown in detail in FIG. 11, the punch 48 articulated at one end at 47 at the tie rod 13 is provided at its other end with a roller 58 in the form of a diabolo capable of rolling on the upper member 59 of circular section of the boom foot element 15 - see also figure 2.

En position de transport, le poinçon 48 est rabattu à l'avant sous la partie arrière 19 du tirant 13 et l'ensemble des deux éléments de grande longueur 42,43 repose au-dessus de la membrure supérieure 59 de l'élément de pied de flèche 15 au moyen d'un support avant 60 muni d'un axe de retenue ou de brochage 61 et d'un support arrière 62 muni d'un axe de brochage 63, sur lequel ou lesquels il vient se positionner, tandis que la biellette 52 est rabattue sur l'extrémité avant de ladite membrure 59.In the transport position, the punch 48 is folded down at the front under the rear part 19 of the tie rod 13 and the assembly of the two very long elements 42, 43 rests above the upper chord 59 of the foot element. jib 15 by means of a front support 60 provided with a retaining or pinning axis 61 and a rear support 62 provided with a pinning axis 63, on which one or which it is positioned, while the rod 52 is folded over the front end of said frame 59.

Le relevage et l'alignement du tirant 13 de la flèche distributrice 7, illustrés aux figures 5, 6 et 7, s'effectuent de la manière suivante :The lifting and alignment of the tie rod 13 of the distributing boom 7, illustrated in FIGS. 5, 6 and 7, is carried out as follows:

Les éléments 15,16,17,18 de la flèche 7 entièrement équipée sont alignés et assemblés entre eux au sol. Les parties 19,20,21 du tirant 13 sont alors assemblées au moyen d'axes 64,65 montés perpendiculaires à la ligne du tirant et au plan médian de la flèche 7 en reliant les biellettes 52,24 respectivement aux chapes 23,34.The elements 15, 16, 17, 18 of the fully equipped boom 7 are aligned and assembled together on the ground. The parts 19, 20, 21 of the tie rod 13 are then assembled by means of axes 64.65 mounted perpendicular to the line of the tie rod and to the median plane of the arrow 7 by connecting the links 52, 24 respectively to the yokes 23.34.

La flèche 7 ainsi équipée est montée sur au moins deux chevalets 66,67 de hauteur suffisante pour le passage du chariot 9 équipé. Le chevalet 66 est disposé à l'arrière du pied de flèche 15, tandis que le chevalet 67 est disposé à l'avant de la flèche 7, au-delà de l'axe d'assemblage du tirant 13, pour éviter le basculement de la flèche 7 lors du relevage dudit tirant 13.The boom 7 thus equipped is mounted on at least two easels 66.67 of sufficient height for the passage of the carriage 9 equipped. The easel 66 is disposed at the rear of the jib foot 15, while the easel 67 is disposed in front of the jib 7, beyond the axis of assembly of the tie rod 13, to avoid tilting of the arrow 7 during the lifting of said tie rod 13.

A l'aide d'un crochet 68 d'un engin auxiliaire de montage 69 disposé dans l'axe de la flèche 7 du côté arrière de celle-ci, on vient prendre l'extrémité libre de l'élingue de relevage 46 suspendue à l'axe 45 du support 44 de la partie arrière 19 du tirant 13 ; l'accrochage de l'élingue 46 au crochet 68 est réalisable au niveau du sol. Ensuite, comme montré à la figure 5, on remonte le crochet 68 de l'engin auxiliaire de montage 69 jusqu'à tendre l'élingue 46.With the aid of a hook 68 of an auxiliary mounting device 69 disposed in the axis of the arrow 7 on the rear side thereof, we come to take the free end of the lifting sling 46 suspended from the axis 45 of the support 44 of the rear part 19 of the tie rod 13; the attachment of the sling 46 to the hook 68 is achievable at ground level. Then, as shown in FIG. 5, the hook 68 of the auxiliary mounting machine 69 is raised until the sling 46 is stretched.

En continuant de remonter le crochet 68 le tirant 13 se soulève progressivement, partie après partie, tandis que sous l'action de son poids propre, le poinçon de relevage 48 suspendu en 47 audit tirant 13 se redresse en roulant, par l'intermédiaire de son galet 58, sur la membrure supérieure 59 de l'élément de pied de flèche 15 - voir figure 6.By continuing to raise the hook 68 the tie rod 13 is gradually raised, part after part, while under the action of its own weight, the lifting punch 48 suspended at 47 in said tie rod 13 straightens by rolling, by means of its roller 58, on the upper member 59 of the jib foot element 15 - see FIG. 6.

Durant cette opération, une élingue double de retenue 70 reliant un point double de fixation 71 situé à l'extrémité arrière de l'élément de pied de flèche 15 à un axe 72 situé au sommet du poinçon de relevage 48, se tend progressivement. En fin d'opération l'élingue double de retenue 70 est tendue et le tirant 13 est sensiblement aligné en position relevée, tandis que l'extrémité inférieure du poinçon de relevage 48 vient en butée sur un axe 73 solidaire d'un support 74 fixé sur la membrure supérieure 59, sensiblement au milieu de la longueur de l'élément de pied de flèche 15 - voir figures 2 et 7. Dans cette position, l'extrémité inférieure du poinçon de relevage 48 est verrouillée à la main ou automatiquement au moyen d'un axe 75 sur le support 74.During this operation, a double retaining sling 70 connecting a double fixing point 71 located at the rear end of the jib foot element 15 to a axis 72 located at the top of the lifting punch 48, tends gradually. At the end of the operation, the double retaining sling 70 is tensioned and the tie rod 13 is substantially aligned in the raised position, while the lower end of the lifting punch 48 abuts on an axis 73 secured to a fixed support 74. on the upper chord 59, substantially in the middle of the length of the jib foot element 15 - see FIGS. 2 and 7. In this position, the lower end of the lifting punch 48 is locked by hand or automatically by means of an axis 75 on the support 74.

Pour lever l'ensemble constitué par la flèche 7 entièrement équipée et le tirant 13 en position relevée, on utilise un palonnier 76 tel que celui représenté à la figure 12. Le palonnier 76 comporte deux brides de fixation 77,78 sur la membrure supérieure 79 de la flèche 7. Chaque bride 77,78 est formée d'un étrier supérieur 80 disposé sur un noeud 81,82 de la structure de la flèche 7 et de deux étriers inférieurs, respectivement 83 et 84, disposés de part et d'autre du noeud 81,82. L'assemblage des étriers inférieurs 83 et 84 sur l'étrier supérieur 80 s'effectue au moyen de vis 87,88. L'immobilisation en rotation, autour de la membrure supérieure 79 de la flèche 7, des brides 77,78 est assurée par des axes 85 engagés dans le contreventement 86 de la flèche 7 à travers les étriers inférieurs 83,84. Chaque étrier supérieur 80 porte à sa partie haute un axe à poignée 89,90 monté perpendiculaire au plan médian de la flèche 7. La bride 77 reprend par son axe 89 une bielle de longueur fixe 91 prolongée par une première élingue de levage 92 ; des rondelles 93 de différentes épaisseurs sont réparties à la demande de part et d'autre de l'axe 89 entre ses supports sur ladite bride 77 et la bielle 91. De l'autre côté, la bride 78 reprend par son axe 90 une bretelle de longueur réglable 94 prolongée par une deuxième élingue de levage 95 ; des rondelles 96 de différentes épaisseurs sont aussi réparties à la demande de part et d'autre de l'axe 90. La bretelle de longueur réglable 94 comprend une bielle réglable 97 articulée à une extrémité sur l'axe 90 et dont le corps comporte plusieurs trous de brochage 98, une jumelle 99 axée à une extrémité sur un trou de brochage 98 de la bielle réglable 97 et, si besoin est, une bielle rallonge 100 brochée en 101 à l'autre extrémité de la jumelle 99.To lift the assembly constituted by the arrow 7 fully equipped and the tie rod 13 in the raised position, a lifting beam 76 is used such as that shown in FIG. 12. The lifting beam 76 has two fixing flanges 77,78 on the upper member 79 of the arrow 7. Each flange 77, 78 is formed by an upper stirrup 80 disposed on a node 81, 82 of the structure of the jib 7 and by two lower stirrups, respectively 83 and 84, arranged on either side. of node 81.82. The lower stirrups 83 and 84 are assembled on the upper stirrup 80 using screws 87, 88. Immobilization in rotation, around the upper member 79 of the arrow 7, flanges 77,78 is provided by pins 85 engaged in the bracing 86 of the arrow 7 through the lower stirrups 83,84. Each upper stirrup 80 carries at its upper part a pin 89.90 mounted perpendicular to the median plane of the arrow 7. The flange 77 takes up by its axis 89 a rod of fixed length 91 extended by a first lifting sling 92; washers 93 of different thicknesses are distributed on request on either side of the axis 89 between its supports on said flange 77 and the connecting rod 91. On the other side, the flange 78 takes up by its axis 90 a strap of adjustable length 94 extended by a second lifting sling 95; washers 96 of different thicknesses are also distributed on demand on either side of the axis 90. The adjustable length strap 94 comprises an adjustable connecting rod 97 articulated at one end on the axis 90 and the body of which comprises several broaching holes 98, a binocular 99 centered at one end on a broaching hole 98 of the adjustable rod 97 and, if necessary, an extension rod 100 pinned at 101 at the other end of the binocular 99.

La pente de la flèche 7 est ajustée en réglant la longueur de la bretelle 94, tandis que son dévers est corrigé par la répartition des rondelles 93 et 96 de part et d'autre des axes 89 et 90. En principe, les réglages sont faits une fois pour toutes pour une flèche de longueur donnée.The slope of the arrow 7 is adjusted by adjusting the length of the strap 94, while its slope is corrected by the distribution of the washers 93 and 96 on either side of the axes 89 and 90. In principle, the adjustments are made once and for all for an arrow of given length.

Le palonnier 76 étant monté réglé, l'ensemble, constitué par la flèche 7 entièrement équipée et le tirant 13 en position relevée, est levé jusqu'au niveau de la tête de mât 6 au moyen de l'engin auxiliaire de montage 69, cette opération étant illustrée par la figure 8.The lifter 76 being mounted adjusted, the assembly, constituted by the arrow 7 fully equipped and the tie rod 13 in the raised position, is raised to the level of the mast head 6 by means of the auxiliary mounting machine 69, this operation being illustrated by figure 8.

Comme montré aux figures 9 et 10, la flèche 7 ainsi levée est présentée pour l'assemblage du pied de flèche 15 sur la face avant de la tête de mât 6. L'assemblage est réalisé au moyen de deux axes 12 reliant deux goussets 102 formant tenons du pivot tournant 5 à des chapes 103 prolongeant vers l'arrière les membrures inférieures 104 du pied de flèche 15. A l'intérieur des goussets 102, un dispositif de guidage 105 du type cornière assure le précentrage des chapes 103 sur les goussets 102 et facilite la mise en place des axes 12.As shown in Figures 9 and 10, the arrow 7 thus raised is presented for the assembly of the boom foot 15 on the front face of the mast head 6. The assembly is carried out by means of two axes 12 connecting two gussets 102 forming tenons of the rotary pivot 5 to yokes 103 extending rearward the lower members 104 of the jib foot 15. Inside the gussets 102, a guide device 105 of the angle type ensures the centering of the yokes 103 on the gussets 102 and facilitates the positioning of the axes 12.

L'assemblage du pied de flèche 15 sur la face avant de la tête de mât 6 étant réalisé, l'extrémité arrière libre du tirant 13 formant un tenon 56 se présente à proximité du sommet 106 de la tête de mât 6. A partir du sommet 106 une bretelle double 107 forme une chape prévue pour être assemblée avec le tenon 56 - voir aussi figure 14. Une échelle d'accès 108 ainsi qu'une plateforme d'intervention 109 sont prévues pour la mise en place de l'axe de liaison 14 par un monteur. La réalisation de l'assemblage du tirant 13 au sommet 106 de la tête de mât 6 est facilitée par la flexibilité latérale du tirant 13 et par le trou oblong 57 du tenon 56.The assembly of the jib foot 15 on the front face of the mast head 6 being produced, the free rear end of the tie rod 13 forming a tenon 56 is present near the top 106 of the mast head 6. From the top 106 a double strap 107 forms a yoke intended to be assembled with the tenon 56 - see also figure 14. An access ladder 108 as well as a platform intervention 109 are provided for the establishment of the connecting axis 14 by a fitter. The assembly of the tie rod 13 at the top 106 of the mast head 6 is facilitated by the lateral flexibility of the tie rod 13 and by the oblong hole 57 of the post 56.

De son côté, la contreflèche 8 montrée en détail sur la figure 13 est montée articulée en 110 sur la face arrière de la tête de mât 6 ou du pivot tournant 5 à la même hauteur que la flèche distributrice 7 et est maintenue en position sensiblement horizontale par l'intermédiaire d'un tirant 111 articulé en 138 au sommet 106 de ladite tête de mât 6. Le tirant 111 est composé de deux éléments de grande longueur 112 identiques de section circulaire montés symétriquement de part et d'autre de la contreflèche 8, et terminés à leurs deux extrémités par des chapes 113,114. Les chapes arrière 113 sont assemblées sur les membrures 115 au niveau de goussets 116, formant tenons, au moyen d'axes 117. Les chapes avant 114 sont assemblées au moyen d'axes 118 sur un élément de liaison 119 constitué de deux fers plats 120 pliés à leur base 121 formant tenon et à leur sommet 122 et réunis par des entretoises 123 et 124. L'élément de liaison 119 est maintenu dans le prolongement des éléments de grande longueur 112 par l'intermédiaire d'un plat d'appui 125 entre les chapes 114 et les tenons 121.For its part, the jib 8 shown in detail in FIG. 13 is mounted articulated at 110 on the rear face of the mast head 6 or of the pivoting pivot 5 at the same height as the distributing jib 7 and is maintained in a substantially horizontal position. by means of a tie rod 111 articulated at 138 at the top 106 of said mast head 6. The tie rod 111 is composed of two very long elements 112 identical of circular section mounted symmetrically on either side of the jib 8 , and terminated at their two ends by yokes 113,114. The rear yokes 113 are assembled on the members 115 at the gussets 116, forming tenons, by means of pins 117. The front yokes 114 are assembled by means of pins 118 on a connecting element 119 consisting of two flat irons 120 folded at their base 121 forming a tenon and at their top 122 and joined by spacers 123 and 124. The connecting element 119 is held in the extension of the elements of great length 112 by means of a support plate 125 between yokes 114 and tenons 121.

Le dispositif pour la mise en oeuvre du procédé pour le montage de la contreflèche 8 comprend un palonnier 126, dont le point milieu 127 sert à l'accrochage du crochet 68 de l'engin auxiliaire de montage 69, et deux systèmes d'élingues identiques fixés aux extrémités 128 du palonnier 126 et montés de part et d'autre de la contreflèche 8, comportant chacun une élingue arrière 129 reliant directement l'extrémité 128 du palonnier 126 à un point de fixation 130 disposé à l'arrière de la membrure correspondante 115 de la contreflèche 8 et une élingue avant en deux parties 131,132, dont la première partie 131 relie l'extrémité 128 du palonnier 126 à un point de fixation 133 du tirant 111 et dont l'autre partie 132 relie un point de fixation 134 du tirant 111 à un point de fixation 135 disposé à l'avant de la membrure correspondante 115 de la contreflèche 8.The device for implementing the method for mounting the jib 8 comprises a lifter 126, the midpoint 127 of which serves to hook the hook 68 of the auxiliary mounting device 69, and two identical sling systems fixed to the ends 128 of the spreader 126 and mounted on either side of the jib 8, each comprising a rear sling 129 directly connecting the end 128 of the spreader 126 to a fixing point 130 disposed at the rear of the corresponding member 115 of the jib 8 and a two-part front sling 131,132, of which the first part 131 connects the end 128 of the spreader 126 to a fixing point 133 of the tie rod 111 and the other part 132 connects a fixing point 134 of the tie rod 111 to a fixing point 135 disposed at the front of the corresponding frame 115 of the jib 8.

Le relevage du tirant 111 et le montage de la contreflèche 8 s'effectuent de la manière suivante :The lifting of the tie rod 111 and the mounting of the jib 8 are carried out as follows:

La contreflèche 8 est assemblée au sol avec son tirant 111 rabattu au-dessus des membrures 115. A l'aide du crochet 68 de l'engin auxiliaire de montage 69 on vient accrocher au niveau du sol le point milieu 127 du palonnier 126, puis on remonte progressivement le crochet 68.The jib 8 is assembled on the ground with its tie rod 111 folded over the members 115. With the aid of the hook 68 of the auxiliary mounting machine 69, the midpoint 127 of the spreader bar 126 is hooked, then the hook 68 is gradually raised.

Dans un premier temps les élingues arrière 129 et les élingues avant 131 se tendent et le tirant 111 se relève jusqu'à ce qu'à leur tour les élingues avant 132 soient tendues. Dans un deuxième temps la contreflèche 8 avec son tirant 111 en position relevée est levée au niveau de la tête de mât 6 au moyen de l'engin auxiliaire de montage 69. Ensuite, comme pour la flèche distributrice 7, la contreflèche 8 est présentée et assemblée en 110 sur la face arrière de la tête de mât 6 ou du pivot tournant 5, et le tirant 111 est assemblé au sommet 106 de ladite tête de mât 6 au moyen d'une bielle 136 munie d'un trou oblong 137 pour faciliter le montage d'un axe 138 - voir figures 1 et 14.Initially the rear slings 129 and the front slings 131 are tensioned and the tie rod 111 is raised until in turn the front slings 132 are tensioned. In a second step, the jib 8 with its tie rod 111 in the raised position is lifted at the level of the mast head 6 by means of the auxiliary mounting machine 69. Then, as for the distributing jib 7, the jib 8 is presented and assembled at 110 on the rear face of the mast head 6 or of the rotary pivot 5, and the tie rod 111 is assembled at the top 106 of said mast head 6 by means of a connecting rod 136 provided with an oblong hole 137 to facilitate mounting an axis 138 - see figures 1 and 14.

Si l'invention est appliquée à la fois à la flèche distributrice 7 et à la contreflèche 8 d'une même grue à tour, on procède en principe d'abord au montage de la contreflèche 8, puis éventuellement à la mise en place d'un contrepoids partiel sur la contreflèche 8, et ensuite au montage de la flèche distributrice 7.If the invention is applied to both the distributing jib 7 and the jib 8 of the same tower crane, in principle one proceeds first to the mounting of the jib 8, then possibly to the installation of a partial counterweight on the jib 8, and then in the mounting of the distributing jib 7.

Claims (13)

  1. Method for mounting tower-crane jibs, enabling a main jib (7) to be mounted, and also optionally a counter-jib (8), provided with a retaining tie (13, 111), one end of which is articulated (at 39, 117) on a jib element (17) or on the counter-jib (8), and the other end of which, initially free, is designed to be connected by pinning (at 14, 138) to the top (106) of the mast head (6) of the crane, characterised in that it consists of:
    - aligning and assembling on the ground the jib elements (15, 16, 17, 18) with their tie (13) folded down;
    - raising and aligning the tie (13) of the jib (7) and, optionally, that (111) of the counter-jib (8), still situated on the ground, so that the free end (56, 122) of the tie (13, 111) is positioned and maintained at a height above the jib (7) or counter-jib (8) for this free end then to be presented correctly with a view to direct pinning to the top (106) of the mast head (6),
    - raising the entire jib (7) or counter-jib (8) with its tie (13, 111) maintained raised and aligned,
    - presenting, at the end of lifting, the jib (7) or counter-jib (8) facing the mast head (6),
    - connecting (at 12, 110) the jib (7) or counter-jib (8) to the base (5) of the mast head (6), and
    - directly pinning (at 14, 138) the free end (56, 122) of the tie (13, 111) of the jib (7) or counter-jib (8) to the top (106) of the mast head (6).
  2. Method for mounting tower-crane jibs according to Claim 1, including the use of an auxiliary lifting machine (69) such as a mobile crane, characterised in that the auxiliary lifting machine (69) is used both for lifting and aligning the tie (13, 111), the jib (7) or counter-jib (8) still situated on the ground, and for thereafter effecting the lifting of the entire jib (7) or counter-jib (8) with its tie (13, 111) maintained raised and aligned, and presenting it in front of the mast head (6).
  3. Method for mounting tower crane jibs according to Claim 1 or 2, characterised in that it is applied to the main jib (7) and to the counter-jib (8) of one and the same tower crane, and in that the counter-jib (8) is mounted first of all, and then the main jib (7).
  4. Device for mounting tower-crane jibs, for implementing the method according to any one of Claims 1 to 3, characterised in that it comprises on the one hand at least one sling (46, 70), or a set of slings (129, 131, 132), connecting a fixed point (71) of the jib foot element (15), in the case of a main jib (7), or a fixed point (130, 135) of the counter-jib (8), to a fixed point (47, 133, 134) of the tie (13, 111), and able to be suspended directly or indirectly from the hook (68) of an auxiliary lifting machine (69), and on the other hand suspension means of the lifting beam type (76, 126), making it possible to lift the entire main jib (7) or counter-jib (8) with its tie (13, 111) maintained lifted and aligned, means (48, 51, 75, 125), supplementing the aforementioned elements, again being provided for maintaining the ties (13, 111) lifted and aligned.
  5. Device for mounting tower crane jibs according to Claim 4, characterised in that, for mounting the main jib (7) of a tower crane, this device comprises, in addition to at least one sling (70) connecting a fixed point (71) of the jib foot element (15) to a fixed point (47) of the tie (13), a raisable stanchion (48), a first end of which is articulated on the said fixed point (47) of the tie (13), whilst its second end has bearing and guiding means (58) for its movement along the top member (59) of the jib foot element (15), means (73, 74, 75) also being provided for stopping the stanchion (48) in the upright position and for pinning it to the said member (59) in this position.
  6. Device for mounting tower crane jibs according to Claim 5, characterised in that the second end of the raisable stanchion (48) has a running roller (58), able to move along the top member (59) of the jib foot (15) and, when the stanchion (48) reaches its upright position, to come into contact with a buffer (73, 74) carried by the said member (59).
  7. Device for mounting tower crane jibs according to Claim 5 or 6, characterised in that the tie (13) of the main jib (7) is produced in several successive parts (19, 20, 21), the respective lengths of which correspond substantially to those of the jib elements (15, 16, 17) on which the parts (19, 20, 21) of the tie (13) are mounted for transportation, the parts (19, 20, 21) of this tie (13) being connected together, at the time of mounting, by means of coupling links (24, 52).
  8. Device for mounting tower crane jibs according to any one of Claims 5 to 7, characterised in that it also comprises a jib lifting beam (76) having two shackles (77, 78) for fixing to the top member (79) of the main jib (7), one (77) of which carries a connecting rod of fixed length (91) and the other one (78) of which carries a strap of adjustable length (94), for correcting the slope of the main jib (7).
  9. Device for mounting tower crane jibs according to Claim 8, characterised in that the connecting rod of fixed length (91) and the strap of adjustable length (94) are positioned laterally on the respective shackles (77, 78) by means of thickness washers (93, 96) disposed on each side of the spindles (89,90) pinning the connecting rod (91) and strap (94) to the respective shackles (77, 78), for correcting the slope of the main jib (7).
  10. Device for mounting tower crane jibs according to Claim 8 or 9, characterised in that the strap of adjustable length (94) comprises an adjustable connecting rod (97) articulated on one end of the shaft (90) for pinning this strap (94) to the shackle (78) and the body of which has several pinning holes (98), a fork (99) centred at one end on a pinning hole (98) for the adjustable connecting rod (97) and, if necessary, an extension rod (100) pinned (at 101) to the other end of the fork (99).
  11. Device for mounting tower crane jibs according to any one of Claims 8 to 10, characterised in that the shackles (77, 78) are each formed by a top stirrup (80) and two bottom stirrups (83, 84), connected together by means of screws (87, 88), and are immobilized with respect to rotation by shafts (85) engaged in the cross-bracing (86) of the jib (7) through the bottom stirrups (83, 84) disposed on each side of the connecting points (81, 82) of the structure of the said jib (7).
  12. Device for mounting tower crane jibs according to Claim 4, characterised in that, for mounting the counter-jib (8) of a tower crane, this device comprises a lifting beam (126), the mid-point of which (127) serves for the suspension from the hook (68) of an auxiliary lifting machine (69), and two sling systems (129, 131, 132) fixed to the ends (128) of the lifting beam (126) and mounted on each side of the counter-jib (8), each having a rear sling (129) directly connecting the lifting beam (126) to a fixed point (130) of a member (115) of the counter-jib (8) and a front sling in two parts (131, 132), one of which (131) connects the lifting beam (126) to the tie (111) for lifting the tie (111), and the other one of which (132) connects the tie (111) to a fixed point (135) of the member (115) of the counter-jib (8) for lifting the entire counter-jib (8) with its tie (111) raised.
  13. Device for mounting tower crane jibs according to any one of Claims 4 to 12, characterised in that apertures (57, 137) are provided for pinning the free ends (56, 122) of the ties (13, 111) to the top (106) of the mast head (6), these apertures (57, 137) preferably being provided at the free end (56) of the tie (13) on the same side as the main jib (7), and on a coupling rod (136) on the same side as the counter-jib (8).
EP94420161A 1993-06-22 1994-06-03 Method and device for mounting the jibs of tower cranes Expired - Lifetime EP0635450B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9307814 1993-06-22
FR9307814A FR2706882B1 (en) 1993-06-22 1993-06-22

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EP0635450B1 true EP0635450B1 (en) 1997-12-03

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EP (1) EP0635450B1 (en)
JP (1) JP3554583B2 (en)
CN (1) CN1033634C (en)
AT (1) ATE160760T1 (en)
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DE (1) DE69407106T2 (en)
DK (1) DK0635450T3 (en)
ES (1) ES2110723T3 (en)
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DK115280B (en) * 1966-05-25 1969-09-22 Edilmac Spa Tower swivel crane with a crane tower swiveling vertically.
FI44039C (en) * 1968-09-18 1971-08-10 Betonikone Ab Oy Method and apparatus for installing a self-erecting crane boom
DE8709267U1 (en) * 1987-07-04 1987-08-20 Man Ghh Logistics Gmbh, 74076 Heilbronn Tower tip of a rotating construction crane designed as a transport and assembly unit

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JP3554583B2 (en) 2004-08-18
FR2706882A1 (en) 1994-12-30
DE69407106D1 (en) 1998-01-15
CZ153194A3 (en) 1995-01-18
ES2110723T3 (en) 1998-02-16
DE69407106T2 (en) 1998-03-26
EP0635450A1 (en) 1995-01-25
RU2145934C1 (en) 2000-02-27
JPH0710471A (en) 1995-01-13
CN1103378A (en) 1995-06-07
CN1033634C (en) 1996-12-25
DK0635450T3 (en) 1998-08-10
FR2706882B1 (en) 1995-08-11
ATE160760T1 (en) 1997-12-15
RU94021633A (en) 1996-09-10

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