EP1873113B1 - Removable assembly device for mast elements of a tower crane - Google Patents

Removable assembly device for mast elements of a tower crane Download PDF

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Publication number
EP1873113B1
EP1873113B1 EP20070356043 EP07356043A EP1873113B1 EP 1873113 B1 EP1873113 B1 EP 1873113B1 EP 20070356043 EP20070356043 EP 20070356043 EP 07356043 A EP07356043 A EP 07356043A EP 1873113 B1 EP1873113 B1 EP 1873113B1
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EP
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Prior art keywords
bolt
assembly device
removable assembly
mast
terminal parts
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EP20070356043
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German (de)
French (fr)
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EP1873113A1 (en
Inventor
Jean-Paul Verchere
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Manitowoc Crane Group France SAS
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Manitowoc Crane Group France SAS
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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
    • B66C23/28—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 constructed to operate at successively higher levels
    • B66C23/283—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 constructed to operate at successively higher levels with frameworks composed of assembled elements
    • B66C23/286—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 constructed to operate at successively higher levels with frameworks composed of assembled elements with locking devices

Definitions

  • the present invention relates generally to the field of tower cranes having a lattice metal frame. More particularly, this invention relates to a removable assembly device for joining the mast elements of such a tower crane.
  • the mast of a tower crane may consist of stackable mast elements, intended to be assembled together, or separated from each other, depending on whether it is desired to raise or raise the crane, or on the contrary to disassemble it.
  • the mast elements usually of square horizontal section, each consist of four vertical corner members, joined in pairs on the four lateral faces of the mast element by a triangulation composed of horizontal crosspieces and oblique bars also called diagonals.
  • the mast members When the crane is mounted, the mast members are vertically arranged one above the other, and they are rigidly connected to each other by the close ends of their corner members.
  • the so-called "end-to-end" connections between the corner members must ensure the continuity of the mast uprights, as well as the transmission of the longitudinal and transverse forces resulting from the various stresses to which the crane is subjected.
  • all these devices comprise an end portion of a frame of a mast element, and a complementary end portion of an angle member of another mast element, as well as connecting means. between the two end parts.
  • a first category of splinting devices uses, for the connection of the ends of the frames of two consecutive mast elements, shear axes that is to say connecting axes perpendicular to the longitudinal direction of the frames, ie in the position of use) horizontal axes, which pass through end portions of the kind "tenon" provided at the ends of the frames.
  • shear axes are in particular provided in two orthogonal directions.
  • Such assembly devices include patents European EP 0530114 and EP 0974546 , the patent application German DE 3936257 and the patent US 3511388 (The latter document, however, aimed at a crane boom).
  • a second category of splints employs pull bolts, which connect the ends of the frames of two consecutive mast members extending in an orientation parallel to the longitudinal direction of the frames, ie (in the use position) in a vertical direction.
  • two traction bolts are respectively disposed near two diametrically opposite angles of the ends of the frames to be connected.
  • the traction members must necessarily be arranged symmetrically with respect to the ribs.
  • the U.S. Patent 3,063,523 discloses a dismountable assembly device by "flat butt" connection with screw clamping means not protruding on the outer surfaces of the device.
  • the present invention aims to remedy all the previously mentioned disadvantages, and is therefore intended to provide a removable assembly device for the mast elements of a tower crane, which on the one hand removes all external asperities in order to allow a relative sliding of mast elements separated by a minimum clearance, and on the other hand minimizes the number of connecting members to allow a faster assembly and disassembly, the design of this assembly device being particularly suitable the specificity of the efforts to be transmitted between the mast elements of a tower crane
  • the screw clamping means comprise, on the one hand, a connecting screw with an axis parallel to the longitudinal axis of said end portions, provided with a head with operating part housed in the recess of one of the end parts, and secondly, a nut secured to the other end part, the two end portions having bores of axis parallel to their longitudinal axis for the passage of the rod of the screw towards the nut.
  • the axis of the connecting screw passes substantially through the center of the section of the end portions of the corner members.
  • the removable assembly device uses in practice a single connecting screw which is arranged vertically inside the horizontal section of the frames and in particular their end portions, particularly in the center of the section. chords, the head of this screw is nevertheless made accessible for its maneuver using a suitable key, which eliminates any lateral asperity that would prevent the free sliding of one mast element relative to another.
  • a single connecting bolt per chord allows rapid assembly and disassembly of the mast of the crane concerned.
  • the bearing surfaces, one male and the other female, of the two half-splices transmit the shear forces and the torsion torques due to the wind and to the crane rotation forces, that of an element from one mast to the other, while facilitating the alignment of the corner members of these mast members, with catching of any misalignment of the members.
  • the head of the connecting screw comprises diametrical bores intended to receive an immobilization pin of the screw in the tight position.
  • a pin can here ensure immobilization in translation of the pin inserted into a diametrical bore of the head of the connecting screw. Thus, after complete tightening of the screw, it is effectively prevented from loosening.
  • a housing may be hollowed on the underside of the recess of the first end portion, this housing receiving the head of the connecting screw or a part of this screw head, in the loosened position of the screw.
  • the rod of the connecting screw may have towards its end at least one diametrical bore adapted to receive, in the loosened position of the screw, a securing pin of the screw with the corresponding end portion.
  • the nut which cooperates with the connecting screw, it is advantageously mounted interchangeably in a corresponding recess of the other end portion, the holding in position of the nut being preferably provided by a pin.
  • the removability of the nut allows its replacement in case of damage, the corresponding end portion remaining in place at the end of the corner frame.
  • the figure 1 represents, partially, two consecutive mast elements, superimposed, which belong to the vertical mast of a tower crane.
  • Each mast element 1 has a horizontal section of square shape, and it comprises four corner members 2 (only one being here visible), arranged vertically in the use position and connected in pairs, on the four lateral faces of the frame.
  • mast element 1 by a triangulation composed of horizontal crosspieces 3 and oblique bars 4, also referred to as "diagonals".
  • Each member 2 is in the form of a tubular profile of substantially square horizontal section, the orientation of which is similar to that of the square section of the mast member 1 to which it belongs.
  • a removable assembly device which provides the "end-to-end” connection between the corresponding corner members 2 of these mast elements 1.
  • the device of FIG. removable assembly represented as a whole on the figure 1 , comprises a first end piece or half-splice 5 placed at the top of each corner frame 2 of the lower mast member 1, and a second end piece or half-splice 6, complementary to the first, placed at the base of the corresponding corner frame 2 of the upper mast element 1.
  • This dismountable assembly device also comprises a single connecting screw 7 and a nut 8.
  • the first half-splice 5 clearly visible on the figures 2 and 3 , has a horizontal section of generally square shape and, in particular, its lower portion 9 has a reduced square section which is engaged and fixed, by welding, in the upper end of the corner frame 2 of the mast member 1 lower.
  • the upper part of the first half-splice 5 has, along the vertical axis 10 of this half-splice 5, a conical female bearing surface 11.
  • the first half-splice 5 has a large recess 12, which opens out on two adjacent lateral faces 13 of this half-splice 5.
  • a cylindrical housing 14 is hollow, along the axis 10, on the lower face of the recess 12 in the lower part 9 of the half-splice 5.
  • the second half-splice 6, shown alone (in the inverted position) on the figure 4 has a horizontal section of generally square shape and, in particular, its upper portion 17 has a reduced square section which is engaged and fixed, by welding, in the lower end of the corner frame 2 of the mast member 1 superior, as is also shown by the figure 1 .
  • the lower part of the second half-splice 6 has, along the vertical axis 18 of this half-splice 6, a conical male bearing surface 19, complementary to the conical female bearing surface 11 of the first half-splice 5.
  • the second half-splice 6 has a recess 20, which opens out on a lateral face 21 of this half-splice 6.
  • a bore 22, centered on the axis 18 of the half-splice 6, passes through the recess 20 and opens at the lower end of this half-splice 6, in other words at the tip of the conical surface 19.
  • the connecting screw 7 has a cylindrical head 23, and a rod 24 with an external thread.
  • the screw head 23 has several diametrical holes 25, as shown in particular in FIG. figure 6 .
  • This screw head 23 is also provided with an operating portion 26, for example with a recessed conformation of square section.
  • Another diametrical bore 27 is formed at the end of the rod 24 of the screw 7.
  • This screw 7 is introduced laterally into the recess 12 of the first half-splice 5, so as to be positioned along the vertical axis 10 of this half-splice 5, the head 23 of the screw 7 is located at the bottom and its rod 24 being directed upwards.
  • the nut 8 whose internal thread is complementary to the external thread of the rod 24 of the screw 7, is introduced into the recess 20 of the second half-splice 6.
  • This nut 8, interchangeable, is held in position on the half-splice 6 by means of a pin 28, as shown in FIG. figure 1 .
  • the screw 7 is then tightened, using a suitable key 29 such as a ratchet inserted laterally into the recess 12 of the first half-splice 5, so that the rod 24 of this screw 7 is screwed into the nut 8 secured to the second half-splice 6.
  • a suitable key 29 such as a ratchet inserted laterally into the recess 12 of the first half-splice 5, so that the rod 24 of this screw 7 is screwed into the nut 8 secured to the second half-splice 6.
  • the screw 7 is immobilized in rotation, thus prevented from loosening, by the introduction of a pin 30 in one of the diametrical holes 25 of the head 23.
  • the pin 30 is engaged through the lateral opening 16 of the first half-splice 5, and this peg 30 is itself immobilized in translation by a pin 31 (see FIG. figure 6 ).
  • the screw 7 is loosened after removal of the pin 31 and the pin 30, which allows the lifting of the angle member 2 of the upper mast member 1, so the separation of the two half-splices 5 and 6.
  • the screw 7 In the loose position, as shown in figure 5 , the screw 7 remains housed in the recess 12 of the first half-splice 5. More particularly, the operating portion 26 of the screw head 23 takes place in the housing 14 cut on the underside of the recess 12. A pin 32 introduced into the bore 27 located at the end of the rod 24 of the screw 7 ensures in this position a fastening of the screw 7 with the half-splice 5.

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

Description

La présente invention concerne, de façon générale, le domaine des grues à tour possédant une charpente métallique en treillis. Plus particulièrement, cette invention se rapporte à un dispositif d'assemblage démontable, destiné à réunir les éléments de mât d'une telle grue à tour.The present invention relates generally to the field of tower cranes having a lattice metal frame. More particularly, this invention relates to a removable assembly device for joining the mast elements of such a tower crane.

Le mât d'une grue à tour peut être constitué d'éléments de mât superposables, prévus pour être assemblés entre eux, ou séparés les uns des autres, selon que l'on souhaite monter ou rehausser la grue, ou au contraire la démonter. Les éléments de mât, habituellement de section horizontale carrée, sont constitués chacun de quatre membrures d'angle verticales, réunies deux à deux sur les quatre faces latérales de l'élément de mât par une triangulation composée de traverses horizontales et de barres obliques aussi appelées diagonales. Lorsque la grue est montée, les éléments de mât sont disposés verticalement les uns au-dessus des autres, et ils sont reliés rigidement les uns aux autres par les extrémités rapprochées de leurs membrures d'angle. Les liaisons ainsi réalisées « bout à bout » entre les membrures d'angle doivent assurer la continuité des montants du mât, ainsi que la transmission des efforts longitudinaux et transversaux provenant des diverses sollicitations auxquelles est soumise la grue.The mast of a tower crane may consist of stackable mast elements, intended to be assembled together, or separated from each other, depending on whether it is desired to raise or raise the crane, or on the contrary to disassemble it. The mast elements, usually of square horizontal section, each consist of four vertical corner members, joined in pairs on the four lateral faces of the mast element by a triangulation composed of horizontal crosspieces and oblique bars also called diagonals. When the crane is mounted, the mast members are vertically arranged one above the other, and they are rigidly connected to each other by the close ends of their corner members. The so-called "end-to-end" connections between the corner members must ensure the continuity of the mast uprights, as well as the transmission of the longitudinal and transverse forces resulting from the various stresses to which the crane is subjected.

L'assemblage entre les membrures d'angle de deux éléments de mât consécutifs d'une grue à tour est réalisé par des dispositifs d'assemblage spécifiques, aussi désignés comme dispositifs d'éclissage, qui répondent aux exigences particulières de ce domaine d'application.The joining between the corner members of two consecutive mast elements of a tower crane is carried out by specific assembly devices, also referred to as splinting devices, which meet the particular requirements of this field of application. .

D'une façon générale, tous ces dispositifs comprennent une partie terminale d'une membrure d'un élément de mât, et une partie terminale complémentaire d'une membrure d'angle d'un autre élément de mât, ainsi que des moyens de liaison entre les deux partie terminales.In general, all these devices comprise an end portion of a frame of a mast element, and a complementary end portion of an angle member of another mast element, as well as connecting means. between the two end parts.

Il existe deux grandes catégories de dispositifs d'éclissage, pour éléments de mât d'une grue à tour.There are two main categories of splinting devices, for mast elements of a tower crane.

Une première catégorie de dispositifs d'éclissage utilise, pour la liaison des extrémités des membrures de deux éléments de mât consécutifs, des axes de cisaillement c'est-à-dire des axes de liaison perpendiculaires à la direction longitudinale des membrures, autrement dit (en position d'utilisation) des axes horizontaux, qui traversent des parties terminales du genre « tenon » prévues aux extrémités des membrures. Ces axes de cisaillement sont notamment prévus suivant deux directions orthogonales. A titre d'exemples de tels dispositifs d'assemblage, on peut citer les brevets européens EP 0530114 et EP 0974546 , la demande de brevet allemand DE 3936257 et le brevet US 3511388 (ce dernier document visant toutefois une flèche de grue).A first category of splinting devices uses, for the connection of the ends of the frames of two consecutive mast elements, shear axes that is to say connecting axes perpendicular to the longitudinal direction of the frames, ie in the position of use) horizontal axes, which pass through end portions of the kind "tenon" provided at the ends of the frames. These shear axes are in particular provided in two orthogonal directions. As examples of Such assembly devices include patents European EP 0530114 and EP 0974546 , the patent application German DE 3936257 and the patent US 3511388 (The latter document, however, aimed at a crane boom).

Une deuxième catégorie de dispositifs d'éclissage utilise des boulons de traction, qui relient les extrémités des membrures de deux éléments de mât consécutifs en s'étendant selon une orientation parallèle à la direction longitudinale des membrures, autrement dit (en position d'utilisation) suivant une direction verticale. En particulier, deux boulons de traction sont disposés respectivement à proximité de deux angles, diamétralement opposés, des extrémités des membrures à relier. En effet, dans ce genre de configuration, les organes de traction doivent être obligatoirement disposés de manière symétrique par rapport aux membrures. Pour cette deuxième catégorie de dispositifs d'assemblage, il est fait référence principalement au brevet français 2184418 . On peut encore citer ici le brevet US 3063523 , qui toutefois concerne une application différente, à savoir l'assemblage de tronçons d'un bras, sans structure en treillis, ce bras étant utilisé en position sensiblement horizontale et étant soumis à des efforts de nature très différente de ceux sollicitant les éléments de mât d'une grue à tous. Si l'on assimile malgré tout un tel bras à une membrure, on note que l'assemblage nécessite ici (pour une membrure) quatre boulons.A second category of splints employs pull bolts, which connect the ends of the frames of two consecutive mast members extending in an orientation parallel to the longitudinal direction of the frames, ie (in the use position) in a vertical direction. In particular, two traction bolts are respectively disposed near two diametrically opposite angles of the ends of the frames to be connected. Indeed, in this kind of configuration, the traction members must necessarily be arranged symmetrically with respect to the ribs. For this second category of fasteners, reference is mainly made to the patent French 2184418 . We can also mention here the patent US 3063523 , which however relates to a different application, namely the assembly of sections of an arm without a lattice structure, this arm being used in substantially horizontal position and being subjected to forces very different in kind from those soliciting the mast elements of a crane to all. If we still consider such an arm to be a chord, we note that the assembly here requires (for a frame) four bolts.

Les deux catégories de dispositifs d'éclissage, précédemment rappelées, conservent des inconvénients qui sont du même ordre. Dans le cas des dispositifs à axes de cisaillement, les axes eux-mêmes et/ou des plaques extérieures de renforcement débordent sur les faces externes des profilés constituant les membrures. Dans le cas des dispositifs à boulons de traction, les boulons traversent deux douilles fixées du côté extérieur des profilés constituant les membrures, et ces boulons se situent ainsi eux-mêmes à l'extérieur des membrures. Dans tous les cas, il existe donc des organes mécaniques ou parties de ceux-ci en saillie sur les faces externes des membrures, ces organes constituant ainsi des aspérités qui font obstacle au coulissement d'un élément de mât par rapport à un autre, sauf si l'on prévoit entre ces éléments un jeu important. Or le coulissement d'un élément de mât par rapport à un autre est utilisé pour le télescopage du mât d'une grue à tour, soit en vue du repliage de la grue, soit en vue d'amener un élément supplémentaire formant une « rallonge » à assembler aux éléments de mât déjà en place.The two categories of splicing devices, previously recalled, retain disadvantages that are of the same order. In the case of devices with shear axes, the axes themselves and / or external reinforcing plates protrude on the outer faces of the profiles constituting the frames. In the case of devices with traction bolts, the bolts pass through two bushings fixed on the outer side of the profiles constituting the frames, and these bolts are themselves located outside the frames. In all cases, there are therefore mechanical members or parts thereof protruding on the outer faces of the frames, these bodies thus constituting asperities that hinder the sliding of one mast element relative to another, except if between these elements there is an important game. However, the sliding of one mast element relative to another is used for telescoping the mast of a tower crane, either for folding the crane or for bringing an additional element forming an "extension To be assembled to the mast elements already in place.

De plus, les dispositifs existants nécessitent en général deux ou plusieurs axes ou boulons de liaison. Dans le cas des dispositifs à axes de cisaillement, le brevet européen précité EP 0974546 prévoit ainsi deux axes de cisaillement orthogonaux, tandis que l'autre brevet européen précité EP 0530114 nécessite quatre axes de cisaillement. Dans le cas des dispositifs à boulons de traction, comme expliqué plus haut, deux boulons au moins sont nécessaires. Bien entendu, ces nombres d'axes ou de boulons sont à multiplier par quatre, si l'on considère l'assemblage de toutes les membrures de deux éléments de mât consécutifs. Ainsi, les temps de montage et de démontage, pour réunir deux éléments de mât ou pour les séparer, restent importants dans tous les cas.In addition, existing devices generally require two or more pins or link bolts. In the case of devices with shear axes, the aforementioned European patent EP 0974546 thus provides for two orthogonal shear axes, while the other European patent mentioned above EP 0530114 requires four shear axes. In the case of tensile bolt devices, as explained above, at least two bolts are required. Of course, these numbers of axes or bolts are to be multiplied by four, if we consider the assembly of all members of two consecutive mast elements. Thus, the assembly and disassembly times, to join two mast elements or to separate them, remain important in all cases.

Le brevet US-A-3 063 523 décrit un dispositif d'assemblage démontable par liaison "bout à bout" plane avec des moyens de serrage à vis n'étant pas en saillie sur les surfaces externes du dispositif.The U.S. Patent 3,063,523 discloses a dismountable assembly device by "flat butt" connection with screw clamping means not protruding on the outer surfaces of the device.

La présente invention vise à remédier à tous les inconvénients précédemment exposés, et elle a donc pour but de fournir un dispositif d'assemblage démontable pour les éléments de mât d'une grue à tour, qui d'une part supprime toutes aspérités extérieures afin de permettre un coulissement relatif d'éléments de mât séparés par un jeu minimal, et qui d'autre part minimise le nombre des organes de liaison afin de permettre un montage et un démontage plus rapides, la conception de ce dispositif d'assemblage étant particulièrement adaptée à la spécificité des efforts à transmettre entre les éléments de mât d'une grue à tourThe present invention aims to remedy all the previously mentioned disadvantages, and is therefore intended to provide a removable assembly device for the mast elements of a tower crane, which on the one hand removes all external asperities in order to allow a relative sliding of mast elements separated by a minimum clearance, and on the other hand minimizes the number of connecting members to allow a faster assembly and disassembly, the design of this assembly device being particularly suitable the specificity of the efforts to be transmitted between the mast elements of a tower crane

A cet effet, l'invention a pour objet un dispositif d'assemblage démontable pour éléments de mât d'une grue à tour possédant une charpente métallique à treillis, le dispositif assurant la liaison « bout à bout » entre les membrures d'angle d'éléments de mât superposés, le dispositif comprenant une partie terminale d'une membrure d'un élément de mât et une partie terminale complémentaire d'une membrure correspondante d'un autre élément de mât, ainsi que des moyens de liaison entre les deux partie terminales, ce dispositif d'assemblage démontable étant essentiellement caractérisé par le fait que :

  • d'une part sont prévus, pour la liaison des deux parties terminales des membrures d'angle, des moyens de serrage à vis disposés suivant un seul axe parallèle à la direction longitudinale desdites parties terminales et situé à l'intérieur de la section de ces parties terminales, donc de la section des membrures d'angle, l'une au moins desdites parties terminales possédant un évidement qui débouche latéralement et donne accès aux moyens de serrage à vis pour leur manoeuvre, et
  • d'autre part, les deux parties terminales précitées étant deux demi-éclisses complémentaires fixées notamment par soudage aux extrémités correspondantes des membrures d'angle, ces deux demi-éclisses présentent des surfaces d'appui complémentaire de forme conique ou pyramidale, dont les sommets se situent sur l'axe des moyens de serrage à vis.
To this end, the subject of the invention is a dismountable assembly device for mast elements of a tower crane having a metal truss frame, the device providing the "end-to-end" connection between the corner chords superimposed mast elements, the device comprising an end portion of a frame of a mast element and a complementary end portion of a corresponding frame of another mast element, and connecting means between the two parts terminals, this dismountable assembly device being essentially characterized by the fact that:
  • on the one hand are provided, for the connection of the two end portions of the corner members, screw clamping means arranged along a single axis parallel to the longitudinal direction of said end portions and located within the section thereof. end portions, therefore of the section of the corner members, at least one of said end portions having a recess which opens laterally and gives access to the screw clamping means for their operation, and
  • on the other hand, the two aforementioned end portions being two complementary half-splices fixed in particular by welding at the corresponding ends of the corner members, these two half-splices have complementary bearing surfaces of conical or pyramidal shape, the vertices of which lie on the axis of the screw clamping means.

Dans une forme de réalisation préférée du dispositif d'assemblage démontable selon l'invention, les moyens de serrage à vis comprennent, d'une part, une vis de liaison d'axe parallèle à l'axe longitudinal desdites parties terminales, munie d'une tête avec partie de manoeuvre logée dans l'évidement de l'une des parties terminales, et d'autre part, un écrou solidarisé avec l'autre partie terminale, les deux parties terminales présentant des alésages d'axe parallèle à leur axe longitudinal pour le passage de la tige de la vis en direction de l'écrou.In a preferred embodiment of the dismountable assembly device according to the invention, the screw clamping means comprise, on the one hand, a connecting screw with an axis parallel to the longitudinal axis of said end portions, provided with a head with operating part housed in the recess of one of the end parts, and secondly, a nut secured to the other end part, the two end portions having bores of axis parallel to their longitudinal axis for the passage of the rod of the screw towards the nut.

Avantageusement, l'axe de la vis de liaison passe sensiblement par le centre de la section des parties terminales des membrures d'angle.Advantageously, the axis of the connecting screw passes substantially through the center of the section of the end portions of the corner members.

Ainsi, le dispositif d'assemblage démontable, objet de l'invention, utilise en pratique une seule vis de liaison qui est disposée verticalement à l'intérieur de la section horizontale des membrures et notamment de leurs parties terminales, notamment au centre de la section des membrures, la tête de cette vis étant néanmoins rendue accessible pour sa manoeuvre à l'aide d'une clé adaptée, ce qui supprime toute aspérité latérale qui ferait obstacle au libre coulissement d'un élément de mât par rapport à un autre. De plus, la présence d'une seule vis de liaison par membrure permet un montage et un démontage rapides du mât de la grue concernée. En outre, les surfaces d'appui, l'une mâle et l'autre femelle, des deux demi-éclisses transmettent les efforts tranchants et les couples de torsion dus au vent et aux efforts de rotation de la grue, ceci d'un élément de mât à l'autre, tout en facilitant l'alignement des membrures d'angle de ces éléments de mât, avec rattrapage d'éventuels défauts d'alignement des membrures.Thus, the removable assembly device, object of the invention, uses in practice a single connecting screw which is arranged vertically inside the horizontal section of the frames and in particular their end portions, particularly in the center of the section. chords, the head of this screw is nevertheless made accessible for its maneuver using a suitable key, which eliminates any lateral asperity that would prevent the free sliding of one mast element relative to another. In addition, the presence of a single connecting bolt per chord allows rapid assembly and disassembly of the mast of the crane concerned. In addition, the bearing surfaces, one male and the other female, of the two half-splices transmit the shear forces and the torsion torques due to the wind and to the crane rotation forces, that of an element from one mast to the other, while facilitating the alignment of the corner members of these mast members, with catching of any misalignment of the members.

Les buts à la base de la présente invention sont ainsi pleinement atteints.The goals underlying the present invention are thus fully achieved.

Avantageusement, la tête de la vis de liaison comporte des perçages diamétraux prévus pour recevoir une cheville d'immobilisation de la vis en position serrée. De plus, une goupille peut ici assurer l'immobilisation en translation de la cheville introduite dans un perçage diamétral de la tête de la vis de liaison. Ainsi, après serrage complet de la vis, celle-ci est efficacement empêchée de se desserrer.Advantageously, the head of the connecting screw comprises diametrical bores intended to receive an immobilization pin of the screw in the tight position. In addition, a pin can here ensure immobilization in translation of the pin inserted into a diametrical bore of the head of the connecting screw. Thus, after complete tightening of the screw, it is effectively prevented from loosening.

Par ailleurs, notamment dans le cas où la tête de la vis de liaison se situe en bas, un logement peut être creusé sur la face inférieure de l'évidement de la première partie terminale, ce logement recevant la tête de la vis de liaison ou une partie de cette tête de vis, dans la position desserrée de la vis. En outre, la tige de la vis de liaison peut comporter vers son extrémité au moins un perçage diamétral prévu pour recevoir, dans la position desserrée de la vis, une goupille de solidarisation de la vis avec la partie terminale correspondante. Ainsi, dans sa position desserrée d'attente, la vis de liaison reste stockée dans la partie terminale de la membrure, en étant positionnée et retenue sur cette partie terminale.Furthermore, especially in the case where the head of the connecting screw is at the bottom, a housing may be hollowed on the underside of the recess of the first end portion, this housing receiving the head of the connecting screw or a part of this screw head, in the loosened position of the screw. In addition, the rod of the connecting screw may have towards its end at least one diametrical bore adapted to receive, in the loosened position of the screw, a securing pin of the screw with the corresponding end portion. Thus, in its loosened waiting position, the connecting screw remains stored in the end portion of the chord, being positioned and retained on this end portion.

Quant à l'écrou, qui coopère avec la vis de liaison, celui-ci est avantageusement monté de façon interchangeable dans un évidement correspondant de l'autre partie terminale, le maintien en position de cet écrou étant de préférence assuré par une goupille. L'amovibilité de l'écrou permet son remplacement en cas d'endommagement, la partie terminale correspondante restant en place à l'extrémité de la membrure d'angle.As for the nut, which cooperates with the connecting screw, it is advantageously mounted interchangeably in a corresponding recess of the other end portion, the holding in position of the nut being preferably provided by a pin. The removability of the nut allows its replacement in case of damage, the corresponding end portion remaining in place at the end of the corner frame.

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 ce dispositif d'assemblage démontable pour éléments de mât d'une grue à tour :

  • Figure 1 est une vue en coupe verticale d'un dispositif d'assemblage conforme la présente invention, réunissant deux éléments de mât superposés (représentés partiellement) :
  • Figure 2 est une vue en perspective montrant une portion d'élément de mât avec l'une des deux demi-éclisses du dispositif objet de l'invention ;
  • Figure 3 représente, en perspective et à plus grande échelle, cette demi-éclisse ;
  • Figure 4 est une vue en perspective de l'autre demi-éclisse du dispositif de l'invention, représentée en position retournée ;
  • Figure 5 est une vue en coupe verticale, analogue à la figure 1, montrant l'une des parties du dispositif d'assemblage de l'invention, à l'état séparé de l'autre partie (ici non représentée) ;
  • Figure 6 est une vue en coupe horizontale, illustrant les moyens d'immobilisation en rotation de la vis du dispositif de l'invention, en position serrée.
The invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing showing, by way of example, an embodiment of this dismountable assembly device for mast elements of a crane. in turn:
  • Figure 1 is a vertical sectional view of an assembly device according to the present invention, combining two superposed mast elements (partially shown):
  • Figure 2 is a perspective view showing a mast element portion with one of the two half-splices of the device object of the invention;
  • Figure 3 represents, in perspective and on a larger scale, this half-splice;
  • Figure 4 is a perspective view of the other half-splice of the device of the invention, shown in the inverted position;
  • Figure 5 is a vertical sectional view similar to the figure 1 , showing one of the parts of the assembly device of the invention, in the state separated from the other part (here not shown);
  • Figure 6 is a horizontal sectional view, illustrating the immobilization means in rotation of the screw of the device of the invention, in a tight position.

La figure 1 représente, partiellement, deux éléments de mât consécutifs, superposés, qui appartiennent au mât vertical d'une grue à tour. Chaque élément de mât 1 possède une section horizontale de forme carrée, et il comporte quatre membrures d'angle 2 (une seule étant ici visible), disposées verticalement en position d'utilisation et réunies deux à deux, sur les quatre faces latérales de l'élément de mât 1, par une triangulation composée de traverses horizontales 3 et de barres obliques 4, aussi désignées comme « diagonales ». Chaque membrure 2 se présente comme un profilé tubulaire de section horizontale sensiblement carrée, dont l'orientation est similaire à celle de la section carrée de l'élément de mât 1 auquel elle appartient.The figure 1 represents, partially, two consecutive mast elements, superimposed, which belong to the vertical mast of a tower crane. Each mast element 1 has a horizontal section of square shape, and it comprises four corner members 2 (only one being here visible), arranged vertically in the use position and connected in pairs, on the four lateral faces of the frame. mast element 1, by a triangulation composed of horizontal crosspieces 3 and oblique bars 4, also referred to as "diagonals". Each member 2 is in the form of a tubular profile of substantially square horizontal section, the orientation of which is similar to that of the square section of the mast member 1 to which it belongs.

Pour réaliser une liaison séparable entre les deux éléments de mât 1, il est prévu un dispositif d'assemblage démontable, qui assure la liaison « bout à bout » entre les membrures d'angle 2 correspondantes de ces éléments de mât 1. Le dispositif d'assemblage démontable, représenté dans son ensemble sur la figure 1, comprend une première pièce terminale ou demi-éclisse 5 placée au sommet de chaque membrure d'angle 2 de l'élément de mât 1 inférieur, et une seconde pièce terminale ou demi-éclisse 6, complémentaire de la première, placée à la base de la membrure d'angle 2 correspondante de l'élément de mât 1 supérieur. Ce dispositif d'assemblage démontable comprend encore une vis de liaison 7 unique et un écrou 8.To make a separable connection between the two mast elements 1, there is provided a removable assembly device, which provides the "end-to-end" connection between the corresponding corner members 2 of these mast elements 1. The device of FIG. removable assembly, represented as a whole on the figure 1 , comprises a first end piece or half-splice 5 placed at the top of each corner frame 2 of the lower mast member 1, and a second end piece or half-splice 6, complementary to the first, placed at the base of the corresponding corner frame 2 of the upper mast element 1. This dismountable assembly device also comprises a single connecting screw 7 and a nut 8.

La première demi-éclisse 5, bien visible sur les figures 2 et 3, possède une section horizontale de forme générale carrée et, en particulier, sa partie inférieure 9 possède une section carrée réduite qui est engagée et fixée, par soudage, dans l'extrémité supérieure de la membrure d'angle 2 de l'élément de mât 1 inférieur.The first half-splice 5, clearly visible on the figures 2 and 3 , has a horizontal section of generally square shape and, in particular, its lower portion 9 has a reduced square section which is engaged and fixed, by welding, in the upper end of the corner frame 2 of the mast member 1 lower.

La partie supérieure de la première demi-éclisse 5 présente, suivant l'axe vertical 10 de cette demi-éclisse 5, une surface conique femelle d'appui 11.The upper part of the first half-splice 5 has, along the vertical axis 10 of this half-splice 5, a conical female bearing surface 11.

Dans sa partie intermédiaire, la première demi-éclisse 5 possède un large évidement 12, qui débouche à l'extérieur sur deux faces latérales 13 adjacentes de cette demi-éclisse 5. Un logement cylindrique 14 est creusé, suivant l'axe 10, sur la face inférieure de l'évidement 12 dans la partie inférieure 9 de la demi-éclisse 5.In its intermediate part, the first half-splice 5 has a large recess 12, which opens out on two adjacent lateral faces 13 of this half-splice 5. A cylindrical housing 14 is hollow, along the axis 10, on the lower face of the recess 12 in the lower part 9 of the half-splice 5.

Un alésage 15, de section circulaire centrée sur l'axe 10, relie le fond de la surface conique 11 au sommet de l'évidement 12 de la première demi-éclisse 5. Enfin, une ouverture latérale 16 fait communiquer le sommet de l'évidement 12 avec une face latérale 13 de la première demi-éclisse 5.A bore 15, of circular section centered on the axis 10, connects the bottom of the conical surface 11 to the top of the recess 12 of the first half-splice 5. Finally, a lateral opening 16 communicates the top of the recess 12 with a lateral face 13 of the first half-splice 5.

La seconde demi-éclisse 6, représentée seule (en position retournée) sur la figure 4, possède une section horizontale de forme générale carrée et, en particulier, sa partie supérieure 17 possède une section carrée réduite qui est engagée et fixée, par soudage, dans l'extrémité inférieure de la membrure d'angle 2 de l'élément de mât 1 supérieur, comme le montre aussi la figure 1.The second half-splice 6, shown alone (in the inverted position) on the figure 4 , has a horizontal section of generally square shape and, in particular, its upper portion 17 has a reduced square section which is engaged and fixed, by welding, in the lower end of the corner frame 2 of the mast member 1 superior, as is also shown by the figure 1 .

La partie inférieure de la seconde demi-éclisse 6 présente, suivant l'axe vertical 18 de cette demi-éclisse 6, une surface conique mâle d'appui 19, complémentaire de la surface conique femelle d'appui 11 de la première demi-éclisse 5.The lower part of the second half-splice 6 has, along the vertical axis 18 of this half-splice 6, a conical male bearing surface 19, complementary to the conical female bearing surface 11 of the first half-splice 5.

Dans sa partie intermédiaire, la seconde demi-éclisse 6 possède un évidement 20, lequel débouche sur une face latérale 21 de cette demi-éclisse 6. Un alésage 22, centré sur l'axe 18 de la demi-éclisse 6, traverse l'évidement 20 et débouche à l'extrémité inférieure de cette demi-éclisse 6, autrement dit à la pointe de la surface conique 19.In its intermediate portion, the second half-splice 6 has a recess 20, which opens out on a lateral face 21 of this half-splice 6. A bore 22, centered on the axis 18 of the half-splice 6, passes through the recess 20 and opens at the lower end of this half-splice 6, in other words at the tip of the conical surface 19.

La vis de liaison 7 possède une tête cylindrique 23, et une tige 24 avec un filetage extérieur. La tête de vis 23 comporte plusieurs perçages diamétraux 25, comme le montre notamment la figure 6. Cette tête de vis 23 est aussi pourvue d'une partie de manoeuvre 26, par exemple avec une conformation en creux de section carrée. Un autre perçage diamétral 27 est ménagé à l'extrémité de la tige 24 de la vis 7. Cette vis 7 est introduite latéralement dans l'évidement 12 de la première demi-éclisse 5, de manière à être positionnée suivant l'axe vertical 10 de cette demi-éclisse 5, la tête 23 de la vis 7 se situant en bas et sa tige 24 étant dirigée vers le haut.The connecting screw 7 has a cylindrical head 23, and a rod 24 with an external thread. The screw head 23 has several diametrical holes 25, as shown in particular in FIG. figure 6 . This screw head 23 is also provided with an operating portion 26, for example with a recessed conformation of square section. Another diametrical bore 27 is formed at the end of the rod 24 of the screw 7. This screw 7 is introduced laterally into the recess 12 of the first half-splice 5, so as to be positioned along the vertical axis 10 of this half-splice 5, the head 23 of the screw 7 is located at the bottom and its rod 24 being directed upwards.

L'écrou 8, dont le filetage intérieur est complémentaire du filetage extérieur de la tige 24 de la vis 7, est introduit dans l'évidement 20 de la seconde demi-éclisse 6. Cet écrou 8, interchangeable, est maintenu en position sur la demi-éclisse 6 au moyen d'une goupille 28, comme le montre la figure 1.The nut 8, whose internal thread is complementary to the external thread of the rod 24 of the screw 7, is introduced into the recess 20 of the second half-splice 6. This nut 8, interchangeable, is held in position on the half-splice 6 by means of a pin 28, as shown in FIG. figure 1 .

L'utilisation du dispositif d'assemblage démontable selon l'invention sera maintenant décrite, en considérant que, lors du montage de la grue, l'élément de mât 1 supérieur vient d'être amené au-dessus de l'élément de mât inférieur, de telle sorte que les quatre demi-éclisses 6 inférieures de l'élément de mât 1 supérieur sont posées respectivement sur les quatre demi-éclisses 5 supérieures de l'élément de mât 1 inférieur. Les surfaces coniques mâles d'appui 19 des demi-éclisses 6 de l'élément de mât 1 supérieur s'appliquent alors sur les surfaces coniques femelles d'appui 11 correspondantes de l'élément de mât 1 inférieur, comme le montre la figure 1, ce qui assure l'alignement des membrures d'angle 2 des deux éléments de mât 1 superposés, en rattrapant un éventuel décalage horizontal.The use of the dismountable assembly device according to the invention will now be described, considering that, when mounting the crane, the upper mast element 1 has just been brought above the mast element. lower, so that the four lower half-splices 6 of the upper mast member 1 are respectively placed on the four upper half-splices 5 of the lower mast member 1. The male conical bearing surfaces 19 of the half-splices 6 of the upper mast element 1 then apply to the corresponding female conical bearing surfaces 11 of the lower mast element 1, as shown in FIG. figure 1 which ensures alignment of the corner members 2 of the two superposed mast members 1, catching any horizontal offset.

La vis 7 est alors serrée, à l'aide d'une clé 29 adaptée telle qu'une clé à cliquet introduite latéralement dans l'évidement 12 de la première demi-éclisse 5, de telle sorte que la tige 24 de cette vis 7 se visse dans l'écrou 8 solidarisé avec la seconde demi-éclisse 6. Après serrage complet, la vis 7 est immobilisée en rotation, donc empêchée de se desserrer, par l'introduction d'une cheville 30 dans l'un des perçages diamétraux 25 de sa tête 23. La cheville 30 est engagée au travers de l'ouverture latérale 16 de la première demi-éclisse 5, et cette cheville 30 est elle-même immobilisée en translation par une goupille 31 (voir figure 6).The screw 7 is then tightened, using a suitable key 29 such as a ratchet inserted laterally into the recess 12 of the first half-splice 5, so that the rod 24 of this screw 7 is screwed into the nut 8 secured to the second half-splice 6. After complete tightening, the screw 7 is immobilized in rotation, thus prevented from loosening, by the introduction of a pin 30 in one of the diametrical holes 25 of the head 23. The pin 30 is engaged through the lateral opening 16 of the first half-splice 5, and this peg 30 is itself immobilized in translation by a pin 31 (see FIG. figure 6 ).

Pour séparer les deux éléments de mât 1 superposés, la vis 7 est desserrée après retrait de la goupille 31 et de la cheville 30, ce qui autorise le soulèvement de la membrure d'angle 2 de l'élément de mât 1 supérieur, donc la séparation des deux demi-éclisses 5 et 6.To separate the two superposed mast elements 1, the screw 7 is loosened after removal of the pin 31 and the pin 30, which allows the lifting of the angle member 2 of the upper mast member 1, so the separation of the two half-splices 5 and 6.

En position desserrée, comme le montre la figure 5, la vis 7 reste logée dans l'évidement 12 de la première demi-éclisse 5. Plus particulièrement, la partie de manoeuvre 26 de la tête de vis 23 prend place dans le logement 14 creusé sur la face inférieure de l'évidement 12. Une goupille 32, introduite dans le perçage 27 situé à l'extrémité de la tige 24 de la vis 7, assure dans cette position une solidarisation de la vis 7 avec la demi-éclisse 5.In the loose position, as shown in figure 5 , the screw 7 remains housed in the recess 12 of the first half-splice 5. More particularly, the operating portion 26 of the screw head 23 takes place in the housing 14 cut on the underside of the recess 12. A pin 32 introduced into the bore 27 located at the end of the rod 24 of the screw 7 ensures in this position a fastening of the screw 7 with the half-splice 5.

L'on ne s'éloignerait pas du cadre de l'invention, telle que défini dans les revendications annexées :

  • en modifiant les formes de détail des deux demi-éclisses du dispositif, par exemple en remplaçant leurs surfaces coniques d'appui par des surfaces d'appui pyramidales, de même fonction ;
  • en inversant les demi-éclisses inférieure et supérieure, le dispositif se trouvant ainsi « retourné » par rapport à l'orientation dans laquelle il a été décrit ci-dessus et illustré au dessin ;
  • en utilisant, pour le serrage et le desserrage de la vis, une partie de manoeuvre de forme différente, par exemple hexagonale pleine ou à « six pans creux », actionnée par une clé correspondante ;
  • en remplaçant la cheville par tout autre moyen d'arrêt en rotation de la vis.
One would not depart from the scope of the invention, as defined in the appended claims:
  • by modifying the forms of detail of the two half-splices of the device, for example by replacing their conical bearing surfaces with pyramidal bearing surfaces of the same function;
  • inverting the lower and upper half-splices, the device is thus "returned" with respect to the orientation in which it was described above and illustrated in the drawing;
  • using, for the tightening and loosening of the screw, a maneuvering part of different shape, for example hexagonal full or "hexagon socket", actuated by a corresponding key;
  • replacing the peg by any other means of stopping rotation of the screw.

Claims (8)

  1. Removable assembly device for mast elements of a tower crane, the device providing the butt connection between the corner members (2) of superposed mast elements (1), the device comprising a terminal part (5) of a corner member (2) of a mast element (1) and a complementary terminal part (6) of a corresponding corner member (2) of another mast element (1), and also connecting means between the two terminal parts (5, 6), characterized in that:
    - firstly, for connecting the two terminal parts (5, 6) of the members, bolt-clamp means (7, 8) are provided along a single axis (10, 18) parallel to the longitudinal direction of said terminal parts and located within the cross section of these terminal parts (5, 6) and thus within the cross section of the corner members (2), at least one of said terminal parts (5, 6) having a void (12) which opens out laterally and provides access to the bolt-clamp means (7, 8) so that they can be manoeuvred, and
    - secondly, since the two abovementioned terminal parts are two complementary half-fishplates (5, 6) fixed in particular by welding to the corresponding ends of the corner members (2), these two half-fishplates (5, 6) have complementary bearing surfaces (11, 19) which are conical or pyramidal in form, the apexes of which are located on the axis (10, 18) of the bolt-clamp means (7, 8).
  2. Removable assembly device according to Claim 1, characterized in that the bolt-clamp means comprise, firstly, a connecting bolt (7) of axis (10) parallel to the longitudinal axis of said terminal parts (5, 6) and provided with a head (23) having a manoeuvring part (26) housed in the void (12) in one of the terminal parts (5), and, secondly, a nut (8) fixed to the other terminal part (6), the two terminal parts (5, 6) having bores (15, 22) of vertical axis (10, 18) parallel to their longitudinal axis in order that the shank (24) of the bolt (7) can pass through them towards the nut (8).
  3. Removable assembly device according to Claim 2, characterized in that the connecting bolt (7) passes more or less through the centre of the cross section of the terminal parts (5, 6) of the corner members (2).
  4. Removable assembly device according to Claim 2 or 3, characterized in that the head (23) of the connecting bolt (7) has diametrical drill holes (25) designed to receive a locking peg (30) preventing the bolt (7) from rotating in the clamped position.
  5. Removable assembly device according to Claim 4, characterized in that a pin (31) is provided to prevent the peg (30) introduced into a diametrical drill hole (25) in the head (23) of the connecting bolt (7) from undergoing translational movement.
  6. Removable assembly device according to one of Claims 2 to 5, characterized in that a housing (14) is hollowed out on the lower surface of the void (12) in the first terminal part (5), this housing (14) receiving the head (23) of the connecting bolt (7) or part (26) of this bolt head in the unclamped position of the bolt (7).
  7. Removable assembly device according to one of Claims 2 to 6, characterized in that the shank (24) of the connecting bolt (7) has near its end at least one diametrical drill hole (27) designed to receive, in the unclamped position of the bolt (7), a pin (32) for fixing the bolt (7) to the corresponding terminal part (5) .
  8. Removable assembly device according to one of Claims 2 to 7, characterized in that the nut (8) of the connecting bolt (7) is mounted interchangeably in a corresponding void (20) in the other terminal part (6), this nut (8) preferably being held in position by a pin (28).
EP20070356043 2006-06-28 2007-04-05 Removable assembly device for mast elements of a tower crane Active EP1873113B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0605815A FR2903094B1 (en) 2006-06-28 2006-06-28 DISMANTLING ASSEMBLY DEVICE FOR MAST ELEMENTS OF A TOWER CRANE

Publications (2)

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EP1873113A1 EP1873113A1 (en) 2008-01-02
EP1873113B1 true EP1873113B1 (en) 2009-05-06

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EP (1) EP1873113B1 (en)
DE (1) DE602007001052D1 (en)
ES (1) ES2326562T3 (en)
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Publication number Priority date Publication date Assignee Title
ITUB20159180A1 (en) * 2015-12-22 2017-06-22 Gp Autolift S R L MODULAR TRALICCIOUS ELEMENT WITH SIMPLIFIED MOUNTING FOR TOWER CRANE TOWERS AND TOWER INCLUDING SUCH MODULAR ELEMENT.
CN110723663A (en) * 2019-10-21 2020-01-24 徐州瑞益晟机械有限公司 Standard knot bolt fastening device of tower crane
CN113339203B (en) * 2021-04-16 2023-01-10 大唐新疆清洁能源有限公司 Alarm system for looseness of bolts of wind turbine tower
FR3132041B1 (en) 2022-01-26 2023-12-22 Manitowoc Crane Group France Screwing/unscrewing tool suitable for a difficult to access screw or bolt, especially on a crane mast or boom
CN116143005B (en) * 2023-04-20 2023-06-27 四川宏升重工机械有限公司 Locking type tower crane frame and use method thereof

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US3063523A (en) * 1959-08-31 1962-11-13 A D Goodwin & Son Inc Boom
US3511388A (en) * 1967-09-18 1970-05-12 Manitowoc Co Pin connection for elongate load supporting boom structure
FR2184418B1 (en) * 1972-05-16 1976-03-12 Richier Sa
DE3936257C2 (en) * 1989-10-31 1999-04-08 Man Ghh Logistics Bolt connection for corner posts of a crane tower
FR2680813B1 (en) * 1991-08-30 1995-10-20 Potain Sa REMOVABLE ASSEMBLY DEVICE FOR METAL FRAME ELEMENTS.
FR2781535B1 (en) * 1998-07-24 2000-08-25 Potain Sa ASSEMBLY DEVICE FOR METAL STRUCTURE MEMBERS

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FR2903094B1 (en) 2009-02-27
EP1873113A1 (en) 2008-01-02
FR2903094A1 (en) 2008-01-04
RU2007124278A (en) 2009-01-10
DE602007001052D1 (en) 2009-06-18
RU2425792C2 (en) 2011-08-10
ES2326562T3 (en) 2009-10-14

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