EP2883829B1 - Assembly device for connecting two structural elements of a tower crane - Google Patents

Assembly device for connecting two structural elements of a tower crane Download PDF

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Publication number
EP2883829B1
EP2883829B1 EP14196718.2A EP14196718A EP2883829B1 EP 2883829 B1 EP2883829 B1 EP 2883829B1 EP 14196718 A EP14196718 A EP 14196718A EP 2883829 B1 EP2883829 B1 EP 2883829B1
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EP
European Patent Office
Prior art keywords
structural element
fish
plating device
base portion
tower crane
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EP14196718.2A
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German (de)
French (fr)
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EP2883829A1 (en
Inventor
Michael Mollenthiel
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Manitowoc Crane Group France SAS
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Manitowoc Crane Group France SAS
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Publication of EP2883829A1 publication Critical patent/EP2883829A1/en
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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 invention relates to a splinting device for linking a first structural element to a second structural element of a mast or boom of a tower crane, such as a crane used on construction sites.
  • the invention relates more particularly to a splinting device comprising at least one splice welded to the mast or boom of the crane, or any other structural element intended to be assembled, such as an arrow holder, a counter-jib, or a pulling for example.
  • a tower crane generally comprises a mast, which extends vertically from a bearing ground, and an arrow that extends horizontally horizontally (crane with a distributing arrow), or at a variable angle of incidence around a horizontal axis (luffing jib crane), in a position of normal use of the crane.
  • the mast of the crane is composed of a plurality of structural elements to be assembled together during assembly of the crane at its place of use, and to be separated from each other during the dismantling of the crane .
  • the structural elements of the tower crane are designed, with regard to their length, so as to facilitate the transport of the crane in the disassembled state, and also to allow the adaptation of the total length of the crane by depending on the conditions and constraints of use of this crane on construction sites.
  • the structural elements of the mast are each constituted by four corner members which are joined in pairs by lattice structures located in the vertical planes of the four lateral faces of the structrel mast element.
  • Each corner member is usually either a tubular section of substantially square section, or a simple angle section "L".
  • these structural elements are arranged vertically one above the other, and they are rigidly connected to each other by the meeting of the close ends of their respective corner members.
  • splinting devices are to be provided for making "end-to-end" connections between the corner members belonging to superposed structural members of the mast, these connections having to ensure the continuity of the mast corner members and the transmission of efforts longitudinal and transversal from the stresses produced by the top of the crane.
  • a type of splinting device for linking a first structural element to a second structural element of a tower crane, comprising at least one splice which extends along a main axis, from a portion of base connected to a frame of the first structural element by a main weld bead, to a connecting portion which projects from a free end of said frame along the main axis, the connecting portion being adapted to be bonded to a chord of the second structural element.
  • the link portion of the splice defines a first bore and the second structural member defines a second complementary bore, the first and second bores being adapted to be traversed by a connecting pin to bind the first structural member to the second structural member. removably.
  • This type of splinting device is for example described and represented in the document FR-A-2185217 .
  • the invention aims to limit this risk of rupture of the weld bead.
  • the invention proposes a splinting device for linking a first structural element to a second structural element of a tower crane, the device comprising at least one splice which extends along a main axis, from a portion of a base connected to a frame of the first structural element by a main weld bead, to a connecting portion which projects from a free end of said frame along the main axis, and which is designed to be bonded on a chord of the second structural element, characterized in that the base portion of the splice has a light which is delimited by a peripheral wall bound to the frame of the first structural element by a secondary weld seam, to limit the mechanical stresses on the main weld bead.
  • the secondary welding seam makes it possible to take back some of the mechanical stresses to limit the concentration of the mechanical stresses on the main weld bead.
  • the base portion of the splint has a distal portion which is connected to the connecting portion, and a U-shaped proximal section having a free end of generally rounded shape, the light being formed in said rounded free end.
  • the rounded shape here makes it possible to avoid geometrical "breaks" in the proximal section which concentrates the mechanical stresses, to ensure a better distribution of the stresses.
  • the proximal portion of the base portion has a generally planar shape of constant section and the distal section has an oblique ramp form of generally increasing section from the proximal section to the connecting portion of the splice.
  • the distal portion of the base portion is delimited laterally by two straight edges parallel to the main axis which each have a chamfer forming a housing for at least a portion of the main weld bead.
  • the light has a cylindrical shape.
  • the splinting device comprises at least two splints which are secured on two opposite external faces and defined by the first structural element, the two splices delimiting a first bore and a second bore which are coaxial and which are designed to receiving a removable connecting pin adapted to bind the first structural member and the second structural member therebetween.
  • the invention also relates to a tower crane assembly, the assembly comprising a first mast structural member and a second mast structural member, the first structural member having at least one corner member equipped with a splinting device. which is arranged to bond the first structural member to the second structural member.
  • the invention also aims to apply to the boom of the crane, the invention relates to a tower crane assembly, the assembly comprising a first boom structural element and a second boom structural element, the first structural member having at least one chord - equipped with a splinting device, which is arranged to link the first structural member to the second structural member.
  • the invention also aims to apply to any structural element to be connected to another structural element, through at least one chord.
  • FIG. 1 An assembly 10 comprising a first structural element 12a and a second structural element 12b (shown in FIG. partially) consecutive, of square horizontal section, of a mast of a tower crane.
  • the first structural element 12a and the second structural element 12b are identical, their elements are designated by the same references followed by the letter “a” for the first structural element 12a, and followed by the letter “b” for the second structural element 12b .
  • the first structural element 12a and the second structural element 12b are intended to be vertically superimposed together by means of several splinting devices 14, in a service configuration of the crane in which the crane rests on a horizontal ground.
  • the first structural element 12a and the second structural element 12b each comprise four corner members 16a, 16b respectively, which are joined two by two by lattice structures 18a, 18b located in the vertical planes of the four lateral faces of the element. structrel 12a, 12b associated.
  • Each corner member 16a of the first member 12a here forms a tubular section of generally square horizontal section which is delimited by four faces 20a and which is formed by two "L" angles welded together.
  • each corner frame 16a has a first vertically opposite end 22a and a second lower end 24a, the first top end 22a of each frame 16a of the first structural member 12a being adapted to be assembled with the second end 24b. bottom of the associated chord 16b of the second structural member 12b.
  • first upper end 22a of each corner frame 16a of the first structural element 12a is equipped with a splinting device 14.
  • splinting device 14 For the sake of clarity, a single splinting device, called “splinting device 14", is described in the remainder of this description.
  • the splinting device 14 comprises a first splint 26 and a second splint 28 forming a first pair of splints 26, 28 which are fixed vis-a-vis on two opposite faces 20a of the associated angle member 16a.
  • the splinting device 14 comprises a third fishplate 30 and a fourth fishplate 32 forming a second pair of fishplates 30, 32 which are fixed in facing relation on two other opposite faces 20a of the angle chord 16a. associated.
  • the first pair of fishplates 26, 28 and the second pair of fishplates 30, 32 are similar, so that only the first pair of fishplates 26, 28 is described in the following description.
  • fishbone 26 the fishplates 26, 28 of the first pair of fishplates being similar, only one fishbone, called “fishbone 26", is described in detail later.
  • the first fishbone 26 and the second fishbone 28 extend along a principal axis A, which is here vertical, from a base portion 34, to a connecting portion 38.
  • the connecting portions 38 which each protrude vertically from a free end of the frame 16a associated along the main axis A delimit a first bore 42 and a second bore (not shown).
  • the first bore 42 and the second bore extend transversely vis-à-vis coaxially along an axis perpendicular to the main axis A.
  • the splinting device 14 has a transverse connecting axis 46 which extends through the first bore 42 and the second bore, and through a complementary transverse passage 48 delimited by the second end 24b of the associated lower rib 16b of the second structural member 12b, in order to bond the first structural member 12a and the second structural member 12b together removably.
  • the connecting pin 46 has a shoulder (not visible at the figure 1 ) forming a first transverse stop at a first end, and a removable ring 50 forming a second transverse stop at an opposite second end.
  • the base portion 34 of the splint 26 has an upper distal portion 52 which is connected to the connecting portion 38, and a proximal section 54 of lower U-shape.
  • the proximal portion 54 of the base portion 34 has a free end of generally rounded shape which has a cylindrical light 56 delimited by an annular peripheral wall 57.
  • proximal portion 54 of the base portion 34 has a generally planar shape of constant cross section.
  • the distal section 52 has a thickness greater than the thickness of the proximal section 54 in a longitudinal direction perpendicular to the main axis A.
  • distal section 52 forms an oblique ramp of generally increasing cross-section in a direction extending from the proximal section 54 to the connecting portion 38 of the splint 26.
  • the distal section 52 of the base portion 34 is delimited laterally by a first edge 58 and a second vertical straight edge 60 which extend parallel to the main axis A.
  • the first edge 58 and the second edge 60 each have a chamfer 62, 64 respectively, forming a first housing 66 and a second housing 68 with the face 20a of the frame 16a.
  • the base portion 34 of the splint 26 is connected to the face 20a of the frame 16a by a peripheral main seam 70 which extends at the periphery of the proximal section 54 in a U-shape and on the first edge 58 and the second edge 60 of the distal section 52.
  • the main welding seam 70 is housed partly in the first housing 66 and the second housing 68 formed by the chamfers 62, 64.
  • the base portion 34 of the splice 26 is connected to the face 20a of the frame 16a by a secondary seam 72, which links the wall 57 of the slot 56 to the face 20a of the frame 16a, to limit mechanical stress on the main weld bead.
  • the secondary welding seam 72 makes it possible to reduce the concentration of mechanical stresses at the lower end of the main welding seam 70.
  • the secondary welding seam 72 makes it possible to distribute the mechanical stresses in an additional zone Z2, illustrated in FIG. figure 3 .
  • the shape of the splint 26 is optimized so as to reduce variations in local stiffness, while ensuring a material section of the splint sufficient to ensure the transmission of forces between the splint 26 and the frame 16a.
  • the light 56 is not limited to a cylindrical shape.
  • the light 56 may have any other annular shape, such as an oblong or oval shape for example.
  • the invention also relates to a set 74 for tower crane shown in FIG. figure 5 , the assembly 74 comprising a first boom structural member 76 and a second boom structural member 78 which each extend generally horizontally, perpendicular to the mast, in a normal use position of the crane.
  • the first structural element 76 and the second boom structural element 78 here have a triangular section and they each consist of three members 79 interconnected by a lattice.
  • first structural element 76 and the second boom structural element 78 are intended to be assembled end to end by means of a splinting device 14 similar to the splinting device 14 previously described, the splinting device 14 having a first splice 82 and a second splice 84 56 welded light of the type described above.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Architecture (AREA)
  • Jib Cranes (AREA)
  • Civil Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Artificial Fish Reefs (AREA)

Description

L'invention concerne un dispositif d'éclissage pour lier un premier élément structurel sur un second élément structurel d'un mât ou d'une flèche d'une grue à tour, telle qu'une grue utilisée sur les chantiers de constructions.The invention relates to a splinting device for linking a first structural element to a second structural element of a mast or boom of a tower crane, such as a crane used on construction sites.

L'invention se rapporte plus particulièrement à un dispositif d'éclissage comportant au moins une éclisse soudée sur le mât ou la flèche de la grue, ou tout autre élément structurel destiné à être assemblé, comme un porte-flèche, une contre-flèche, ou un tirant par exemple.The invention relates more particularly to a splinting device comprising at least one splice welded to the mast or boom of the crane, or any other structural element intended to be assembled, such as an arrow holder, a counter-jib, or a pulling for example.

Une grue à tour comporte généralement un mât, qui s'étend verticalement depuis un sol d'appui, et une flèche qui s'étend globalement soit horizontalement (grue à flèche distributrice), soit selon un angle d'incidence variable autour d'un axe horizontal (grue à flèche relevable), dans une position d'utilisation normale de la grue.A tower crane generally comprises a mast, which extends vertically from a bearing ground, and an arrow that extends horizontally horizontally (crane with a distributing arrow), or at a variable angle of incidence around a horizontal axis (luffing jib crane), in a position of normal use of the crane.

Classiquement, le mât de la grue est composé d'une pluralité d'éléments structurels appelés à être assemblés entre eux lors du montage de la grue sur son lieu d'utilisation, et à être séparés les uns des autres lors du démontage de la grue.Conventionally, the mast of the crane is composed of a plurality of structural elements to be assembled together during assembly of the crane at its place of use, and to be separated from each other during the dismantling of the crane .

Les éléments structurels de la grue à tour sont conçus, en ce qui concerne leur longueur, de manière à faciliter le transport de la grue à l'état démonté, et aussi de manière à permettre l'adaptation de la longueur totale de la grue en fonction des conditions et contraintes d'utilisation de cette grue sur les chantiers.The structural elements of the tower crane are designed, with regard to their length, so as to facilitate the transport of the crane in the disassembled state, and also to allow the adaptation of the total length of the crane by depending on the conditions and constraints of use of this crane on construction sites.

Les éléments structurels du mât, habituellement de section horizontale carrée, sont constitués chacun par quatre membrures d'angle qui sont réunies deux à deux par des structures en treillis situées dans les plans verticaux des quatre faces latérales de l'élément structrel de mât.The structural elements of the mast, usually of square horizontal section, are each constituted by four corner members which are joined in pairs by lattice structures located in the vertical planes of the four lateral faces of the structrel mast element.

Chaque membrure d'angle est habituellement soit un profilé tubulaire de section sensiblement carrée, soit une simple cornière de section en « L ».Each corner member is usually either a tubular section of substantially square section, or a simple angle section "L".

Pour constituer le mât d'une grue, ces éléments structurels sont disposés verticalement les uns au-dessus des autres, et ils sont reliés rigidement les uns aux autres par la réunion des extrémités rapprochées de leurs membrures d'angle respectives.To form the mast of a crane, these structural elements are arranged vertically one above the other, and they are rigidly connected to each other by the meeting of the close ends of their respective corner members.

Ainsi, des dispositifs d'éclissage sont à prévoir, pour réaliser des liaisons « bout à bout » entre les membrures d'angle appartenant à des éléments structurels de mât superposés, ces liaisons devant assurer la continuité des membrures d'angle du mât et la transmission des efforts longitudinaux et transversaux provenant des sollicitations produites par la partie supérieure de la grue.Thus, splinting devices are to be provided for making "end-to-end" connections between the corner members belonging to superposed structural members of the mast, these connections having to ensure the continuity of the mast corner members and the transmission of efforts longitudinal and transversal from the stresses produced by the top of the crane.

De plus, comme il résulte de ce qui précède, ces dispositifs d'éclissage doivent réaliser une liaison rigide mais aussi démontable.In addition, as it follows from the foregoing, these splinting devices must make a rigid connection but also removable.

A cet effet, on connait un type de dispositif d'éclissage pour lier un premier élément structurel sur un second élément structurel d'une grue à tour, comportant au moins une éclisse qui s'étend suivant un axe principal, depuis une portion d'embase reliée sur une membrure du premier élément structurel par un cordon de soudure principal, jusqu'à une portion de liaison qui fait saillie depuis une extrémité libre de ladite membrure suivant l'axe principal, la portion de liaison étant conçue pour être liée sur une membrure du second élément structurel.For this purpose, a type of splinting device is known for linking a first structural element to a second structural element of a tower crane, comprising at least one splice which extends along a main axis, from a portion of base connected to a frame of the first structural element by a main weld bead, to a connecting portion which projects from a free end of said frame along the main axis, the connecting portion being adapted to be bonded to a chord of the second structural element.

La portion de liaison de l'éclisse délimite un premier alésage et le second élément structurel délimite un second alésage complémentaire, le premier et le second alésages étant adaptés pour être traversés par un axe de liaison pour lier le premier élément structurel sur le second élément structurel de façon démontable.The link portion of the splice defines a first bore and the second structural member defines a second complementary bore, the first and second bores being adapted to be traversed by a connecting pin to bind the first structural member to the second structural member. removably.

Ce type de dispositif d'éclissage est par exemple décrit et représenté dans le document FR-A-2185217 .This type of splinting device is for example described and represented in the document FR-A-2185217 .

Bien que ce type de dispositif d'éclissage permette une liaison efficace de deux éléments structurels d'une grue à tour, le cordon de soudure qui relie la portion d'embase de l'éclisse sur la membrure associée peut se fissurer par fatigue sous l'effet des contraintes mécaniques importantes transmises à l'éclisse.Although this type of splinting device allows efficient connection of two structural elements of a tower crane, the weld bead that connects the base portion of the splice to the associated chord may fatigue crack under the effect of the important mechanical stresses transmitted to the splice.

L'invention vise à limiter ce risque de rupture du cordon de soudure.The invention aims to limit this risk of rupture of the weld bead.

Dans ce but, l'invention propose un dispositif d'éclissage pour lier un premier élément structurel sur un second élément structurel d'une grue à tour, le dispositif comportant au moins une éclisse qui s'étend suivant un axe principal, depuis une portion d'embase reliée sur une membrure du premier élément structurel par un cordon de soudure principal, jusqu'à une portion de liaison qui fait saillie depuis une extrémité libre de ladite membrure suivant l'axe principal, et qui est conçue pour être liée sur une membrure du second élément structurel, caractérisé en ce que la portion d'embase de l'éclisse présente une lumière qui est délimitée par une paroi périphérique liée sur la membrure du premier élément structurel par un cordon de soudure secondaire, pour limiter les contraintes mécaniques sur le cordon de soudure principal.For this purpose, the invention proposes a splinting device for linking a first structural element to a second structural element of a tower crane, the device comprising at least one splice which extends along a main axis, from a portion of a base connected to a frame of the first structural element by a main weld bead, to a connecting portion which projects from a free end of said frame along the main axis, and which is designed to be bonded on a chord of the second structural element, characterized in that the base portion of the splice has a light which is delimited by a peripheral wall bound to the frame of the first structural element by a secondary weld seam, to limit the mechanical stresses on the main weld bead.

Ainsi, le cordon de soudure secondaire permet de reprendre une partie des contraintes mécaniques pour limiter la concentration des contraintes mécaniques sur le cordon de soudure principal.Thus, the secondary welding seam makes it possible to take back some of the mechanical stresses to limit the concentration of the mechanical stresses on the main weld bead.

Selon une autre caractéristique, la portion d'embase de l'éclisse présente un tronçon distal qui est relié sur la portion de liaison, et un tronçon proximal de forme en U présentant une extrémité libre de forme globalement arrondie, la lumière étant formée dans ladite extrémité libre arrondie.According to another characteristic, the base portion of the splint has a distal portion which is connected to the connecting portion, and a U-shaped proximal section having a free end of generally rounded shape, the light being formed in said rounded free end.

La forme arrondie permet ici d'éviter les « cassures » géométriques dans le tronçon proximal qui concentre les contraintes mécaniques, pour assurer une meilleure répartition des contraintes.The rounded shape here makes it possible to avoid geometrical "breaks" in the proximal section which concentrates the mechanical stresses, to ensure a better distribution of the stresses.

De même, le tronçon proximal de la portion d'embase présente une forme globalement plane de section constante et le tronçon distal présente une forme en rampe oblique de section globalement croissante depuis le tronçon proximal jusqu'à la portion de liaison de l'éclisse.Similarly, the proximal portion of the base portion has a generally planar shape of constant section and the distal section has an oblique ramp form of generally increasing section from the proximal section to the connecting portion of the splice.

De plus, le tronçon distal de la portion d'embase est délimité latéralement par deux bords droits parallèles à l'axe principal qui présentent chacun un chanfrein formant logement pour au moins une partie du cordon de soudure principal.In addition, the distal portion of the base portion is delimited laterally by two straight edges parallel to the main axis which each have a chamfer forming a housing for at least a portion of the main weld bead.

Selon un mode de réalisation préféré, la lumière présente une forme cylindrique.According to a preferred embodiment, the light has a cylindrical shape.

Selon un autre aspect, le dispositif d'éclissage comporte au moins deux éclisses qui sont solidarisées sur deux faces externes opposées et définies par le premier élément structurel, les deux éclisses délimitant un premier alésage et un second alésage qui sont coaxiaux et qui sont conçus pour recevoir un axe de liaison amovible adapté pour lier le premier élément structurel et le second élément structurel entre eux.In another aspect, the splinting device comprises at least two splints which are secured on two opposite external faces and defined by the first structural element, the two splices delimiting a first bore and a second bore which are coaxial and which are designed to receiving a removable connecting pin adapted to bind the first structural member and the second structural member therebetween.

L'invention concerne aussi un ensemble pour grue à tour, l'ensemble comprenant un premier élément structurel de mât et un second élément structurel de mât, le premier élément structurel comportant au moins une membrure d'angle équipée d'un dispositif d'éclissage, qui est agencé pour lier le premier élément structurel sur le second élément structurel.The invention also relates to a tower crane assembly, the assembly comprising a first mast structural member and a second mast structural member, the first structural member having at least one corner member equipped with a splinting device. which is arranged to bond the first structural member to the second structural member.

L'invention vise aussi à s'appliquer à la flèche de la grue, l'invention concernant un ensemble pour grue à tour, l'ensemble comprenant un premier élément structurel de flèche et un second élément structurel de flèche, le premier élément structurel comportant au moins une membrure - équipée d'un dispositif d'éclissage, qui est agencé pour lier le premier élément structurel sur le second élément structurel.The invention also aims to apply to the boom of the crane, the invention relates to a tower crane assembly, the assembly comprising a first boom structural element and a second boom structural element, the first structural member having at least one chord - equipped with a splinting device, which is arranged to link the first structural member to the second structural member.

Plus généralement, de façon similaire, l'invention vise aussi à s'appliquer à tout élément structurel devant être lié à un autre élément structurel, par l'intermédiaire d'au moins une membrure.More generally, in a similar way, the invention also aims to apply to any structural element to be connected to another structural element, through at least one chord.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective, qui illustre un premier élément structurel et un second élément structurel non assemblés d'un mât d'une grue à tour équipé d'un dispositif d'éclissage selon l'invention ;
  • la figure 2 est une vue de côté, qui illustre une éclisse du dispositif de la figure 1 ;
  • la figure 3 est une vue de face, qui illustre une éclisse du dispositif de la figure 1 ;
  • la figure 4 est une vue en coupe suivant l'axe 4-4 de la figure 3, qui illustre une éclisse du dispositif de la figure 1 ;
  • la figure 5 est une vue en section suivant l'axe 5-5 de la figure 3, qui illustre une éclisse du dispositif de la figure 1 ;
  • la figure 6 est une vue en perspective, qui illustre le dispositif d'éclissage selon l'invention reliant entre eux deux éléments structurels d'une flèche d'une grue à tour.
Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 is a perspective view, which illustrates a first unassembled structural member and a second structural member of a mast of a tower crane equipped with a splinting device according to the invention;
  • the figure 2 is a side view, which illustrates a splint of the device of the figure 1 ;
  • the figure 3 is a front view, which illustrates a splint of the device of the figure 1 ;
  • the figure 4 is a sectional view along the axis 4-4 of the figure 3 , which illustrates a splint of the device of the figure 1 ;
  • the figure 5 is a sectional view along line 5-5 of the figure 3 , which illustrates a splint of the device of the figure 1 ;
  • the figure 6 is a perspective view, which illustrates the splinting device according to the invention interconnecting two structural elements of an arrow of a tower crane.

Dans la description et les revendications, on utilisera à titre non limitatif les expressions « supérieur », « inférieur » et « bas », « haut » en référence à la partie supérieure et à la partie inférieure respectivement de la figure 1.In the description and the claims, the terms "superior", "lower" and "low", "high" will be used without implying any limitation with reference to the upper part and the lower part respectively of the figure 1 .

De plus, pour clarifier la description et les revendications, on adoptera à titre non limitatif la terminologie longitudinal, vertical et transversal en référence au trièdre L, V, T indiqué aux figures.Moreover, to clarify the description and the claims, the longitudinal, vertical and transverse terminology will be adopted in a nonlimiting manner with reference to the L, V, T trihedron indicated in the figures.

Sur l'ensemble de ces figures, des références identiques ou analogues représentent des organes ou ensembles d'organes identiques ou analogues.In all of these figures, identical or similar references represent identical or similar organs or sets of members.

On a représenté à la figure 1 un ensemble 10 comprenant un premier élément structurel 12a et un second élément structurel 12b (représenté partiellement) consécutifs, de section horizontale carrée, d'un mât d'une grue à tour.We have shown figure 1 an assembly 10 comprising a first structural element 12a and a second structural element 12b (shown in FIG. partially) consecutive, of square horizontal section, of a mast of a tower crane.

Le premier élément structurel 12a et le second élément structurel 12b sont identiques, leurs éléments sont désignés par les même références suivies de la lettre « a » pour le premier élément structurel 12a, et suivies de la lettre « b » pour le second élément structurel 12b.The first structural element 12a and the second structural element 12b are identical, their elements are designated by the same references followed by the letter "a" for the first structural element 12a, and followed by the letter "b" for the second structural element 12b .

Le premier élément structurel 12a et le second élément structurel 12b sont destinés à être assemblés de façon superposée verticalement au moyen de plusieurs dispositifs d'éclissage 14, dans une configuration de service de la grue dans laquelle la grue repose sur un sol horizontal.The first structural element 12a and the second structural element 12b are intended to be vertically superimposed together by means of several splinting devices 14, in a service configuration of the crane in which the crane rests on a horizontal ground.

Le premier élément structurel 12a et le second élément structurel 12b comportent chacun quatre membrures d'angle 16a, 16b respectivement, qui sont réunies deux à deux par des structures en treillis 18a, 18b situées dans les plans verticaux des quatre faces latérales de l'élément structrel 12a, 12b associé.The first structural element 12a and the second structural element 12b each comprise four corner members 16a, 16b respectively, which are joined two by two by lattice structures 18a, 18b located in the vertical planes of the four lateral faces of the element. structrel 12a, 12b associated.

Afin de ne pas alourdir la description, seul le premier élément structurel 12a est décrit en détail par la suite.In order not to weigh down the description, only the first structural element 12a is described in detail later.

Chaque membrure d'angle 16a du premier élément 12a forme ici un profilé tubulaire de section horizontale globalement carrée qui est délimité par quatre faces 20a et qui est formé par deux cornières en « L » soudées entre elles.Each corner member 16a of the first member 12a here forms a tubular section of generally square horizontal section which is delimited by four faces 20a and which is formed by two "L" angles welded together.

De même, chaque membrure d'angle 16a présente une première extrémité 22a supérieure et une seconde extrémité 24a inférieure qui sont opposées verticalement, la première extrémité 22a supérieure de chaque membrure 16a du premier élément structurel 12a étant conçue pour être assemblée avec la seconde extrémité 24b inférieure de la membrure 16b associée du second élément structurel 12b.Likewise, each corner frame 16a has a first vertically opposite end 22a and a second lower end 24a, the first top end 22a of each frame 16a of the first structural member 12a being adapted to be assembled with the second end 24b. bottom of the associated chord 16b of the second structural member 12b.

A cet effet, la première extrémité 22a supérieure de chaque membrure d'angle 16a du premier élément structurel 12a est équipée d'un dispositif d'éclissage 14.For this purpose, the first upper end 22a of each corner frame 16a of the first structural element 12a is equipped with a splinting device 14.

Par souci de clarté, un seul dispositif d'éclissage, appelé « dispositif d'éclissage 14 », est décrit dans la suite de la présente description.For the sake of clarity, a single splinting device, called "splinting device 14", is described in the remainder of this description.

Comme on peut le voir à la figure 1, le dispositif d'éclissage 14 comporte une première éclisse 26 et une seconde éclisse 28 formant une première paire d'éclisses 26, 28 qui sont fixées en vis-à-vis sur deux faces 20a opposées de la membrure d'angle 16a associée.As can be seen at figure 1 , the splinting device 14 comprises a first splint 26 and a second splint 28 forming a first pair of splints 26, 28 which are fixed vis-a-vis on two opposite faces 20a of the associated angle member 16a.

De même, le dispositif d'éclissage 14 comporte une troisième éclisse 30 et une quatrième éclisse 32 formant seconde paire d'éclisses 30, 32 qui sont fixées en vis-à-vis sur deux autres faces 20a opposées de la membrure d'angle 16a associée.Similarly, the splinting device 14 comprises a third fishplate 30 and a fourth fishplate 32 forming a second pair of fishplates 30, 32 which are fixed in facing relation on two other opposite faces 20a of the angle chord 16a. associated.

La première paire d'éclisses 26, 28 et la seconde paire d'éclisses 30, 32 sont similaires, de sorte que seule la première paire d'éclisses 26, 28 est décrite dans la suite de la description.The first pair of fishplates 26, 28 and the second pair of fishplates 30, 32 are similar, so that only the first pair of fishplates 26, 28 is described in the following description.

De même, les éclisses 26, 28 de la première paire d'éclisses étant similaires, seule une éclisse, appelée « éclisse 26 », est décrite en détail par la suite.Similarly, the fishplates 26, 28 of the first pair of fishplates being similar, only one fishbone, called "fishbone 26", is described in detail later.

La première éclisse 26 et la deuxième éclisse 28 s'étendent suivant un axe A principal, qui est ici vertical, depuis une portion d'embase 34, jusqu'à une portion de liaison 38.The first fishbone 26 and the second fishbone 28 extend along a principal axis A, which is here vertical, from a base portion 34, to a connecting portion 38.

Les portions de liaison 38 qui font saillie chacune verticalement depuis une extrémité libre de la membrure 16a associée suivant l'axe A principal, délimitent un premier alésage 42 et un second alésage (non représenté).The connecting portions 38 which each protrude vertically from a free end of the frame 16a associated along the main axis A delimit a first bore 42 and a second bore (not shown).

Le premier alésage 42 et le second alésage s'étendent transversalement en vis-à-vis de façon coaxiale suivant un axe perpendiculaire à l'axe A principal.The first bore 42 and the second bore extend transversely vis-à-vis coaxially along an axis perpendicular to the main axis A.

Complémentairement, le dispositif d'éclissage 14 comporte un axe de liaison 46 transversal qui s'étend à travers le premier alésage 42 et le second alésage, et à travers un passage 48 transversal complémentaire délimité par la seconde extrémité 24b inférieure de la membrure 16b associée du second élément structurel 12b, afin de lier le premier élément structurel 12a et le second élément structurel 12b entre eux de façon démontable.Complementarily, the splinting device 14 has a transverse connecting axis 46 which extends through the first bore 42 and the second bore, and through a complementary transverse passage 48 delimited by the second end 24b of the associated lower rib 16b of the second structural member 12b, in order to bond the first structural member 12a and the second structural member 12b together removably.

A cet effet, l'axe de liaison 46 comporte un épaulement (non visible à la figure 1) formant première butée transversale à une première extrémité, et une bague 50 amovible formant seconde butée transversale à une seconde extrémité opposée.For this purpose, the connecting pin 46 has a shoulder (not visible at the figure 1 ) forming a first transverse stop at a first end, and a removable ring 50 forming a second transverse stop at an opposite second end.

Selon un autre aspect, comme on peut le voir aux figures 2 à 4, la portion d'embase 34 de l'éclisse 26 présente un tronçon distal 52 supérieur qui est relié sur la portion de liaison 38, et un tronçon proximal 54 inférieur de forme en U.In another aspect, as can be seen in Figures 2 to 4 , the base portion 34 of the splint 26 has an upper distal portion 52 which is connected to the connecting portion 38, and a proximal section 54 of lower U-shape.

Le tronçon proximal 54 de la portion d'embase 34 présente une extrémité libre de forme globalement arrondie qui présente une lumière 56 de forme cylindrique délimitée par une paroi 57 périphérique annulaire.The proximal portion 54 of the base portion 34 has a free end of generally rounded shape which has a cylindrical light 56 delimited by an annular peripheral wall 57.

De plus, le tronçon proximal 54 de la portion d'embase 34 présente une forme globalement plane de section transversale constante.In addition, the proximal portion 54 of the base portion 34 has a generally planar shape of constant cross section.

Selon la figure 2, le tronçon distal 52 présente une épaisseur supérieure à l'épaisseur du tronçon proximal 54 suivant une direction longitudinale perpendiculaire à l'axe A principal.According to figure 2 , the distal section 52 has a thickness greater than the thickness of the proximal section 54 in a longitudinal direction perpendicular to the main axis A.

De plus, le tronçon distal 52 forme une rampe oblique de section transversale globalement croissante vers le haut, suivant une direction qui s'étend depuis le tronçon proximal 54 jusqu'à la portion de liaison 38 de l'éclisse 26.In addition, the distal section 52 forms an oblique ramp of generally increasing cross-section in a direction extending from the proximal section 54 to the connecting portion 38 of the splint 26.

Aussi, comme on peut le voir aux figures 3 et 4, le tronçon distal 52 de la portion d'embase 34 est délimité latéralement par un premier bord 58 et un second bord 60 droits verticaux qui s'étendent parallèlement à l'axe A principal.Also, as can be seen at Figures 3 and 4 , the distal section 52 of the base portion 34 is delimited laterally by a first edge 58 and a second vertical straight edge 60 which extend parallel to the main axis A.

Le premier bord 58 et le second bord 60 présentent chacun un chanfrein 62, 64 respectivement, formant un premier logement 66 et un second logement 68 avec la face 20a de la membrure 16a.The first edge 58 and the second edge 60 each have a chamfer 62, 64 respectively, forming a first housing 66 and a second housing 68 with the face 20a of the frame 16a.

La portion d'embase 34 de l'éclisse 26 est reliée sur la face 20a de la membrure 16a par un cordon de soudure principal 70 périphérique qui s'étend à la périphérie du tronçon proximal 54 en U et sur le premier bord 58 et le second bord 60 du tronçon distal 52.The base portion 34 of the splint 26 is connected to the face 20a of the frame 16a by a peripheral main seam 70 which extends at the periphery of the proximal section 54 in a U-shape and on the first edge 58 and the second edge 60 of the distal section 52.

Comme on peut le voir à la figure 4, le cordon de soudure principal 70 est logé en partie dans le premier logement 66 et le second logement 68 formé par les chanfreins 62, 64.As can be seen at figure 4 , the main welding seam 70 is housed partly in the first housing 66 and the second housing 68 formed by the chamfers 62, 64.

De façon complémentaire, en référence aux figures 3 et 5, la portion d'embase 34 de l'éclisse 26 est reliée sur la face 20a de la membrure 16a par un cordon de soudure secondaire 72, qui lie la paroi 57 de la lumière 56 sur la face 20a de la membrure 16a, pour limiter les contraintes mécaniques sur le cordon de soudure principal.In a complementary way, with reference to figures 3 and 5 , the base portion 34 of the splice 26 is connected to the face 20a of the frame 16a by a secondary seam 72, which links the wall 57 of the slot 56 to the face 20a of the frame 16a, to limit mechanical stress on the main weld bead.

Le cordon de soudure secondaire 72 permet de réduire la concentration de contraintes mécaniques à l'extrémité inférieure du cordon de soudure principal 70.The secondary welding seam 72 makes it possible to reduce the concentration of mechanical stresses at the lower end of the main welding seam 70.

En effet, il apparait que les contraintes tendent à se concentrer dans une zone Z1 qui est située à l'extrémité libre inférieure de l'éclisse 26 et qui est représentée à la figure 3 par un trait pointillé, cette concentration de contraintes pouvant provoquer une rupture du cordon de soudure principal 70.Indeed, it appears that the stresses tend to concentrate in an area Z1 which is located at the lower free end of the stringer 26 and who is represented at the figure 3 by a dotted line, this concentration of stresses may cause a rupture of the main weld seam 70.

Le cordon de soudure secondaire 72 permet de répartir les contraintes mécaniques dans une zone Z2 supplémentaire, illustrée à la figure 3.The secondary welding seam 72 makes it possible to distribute the mechanical stresses in an additional zone Z2, illustrated in FIG. figure 3 .

Aussi, la forme de l'éclisse 26 est optimisée de façon à réduire les variations de rigidité locale, tout en garantissant une section de matière de l'éclisse suffisante pour assurer la transmission des efforts entre l'éclisse 26 et la membrure 16a.Also, the shape of the splint 26 is optimized so as to reduce variations in local stiffness, while ensuring a material section of the splint sufficient to ensure the transmission of forces between the splint 26 and the frame 16a.

A titre non limitatif, la lumière 56 n'est pas limitée à une forme cylindrique.By way of non-limiting example, the light 56 is not limited to a cylindrical shape.

En effet, la lumière 56 peut présenter toute autre forme annulaire, comme une forme oblongue ou ovale par exemple.Indeed, the light 56 may have any other annular shape, such as an oblong or oval shape for example.

L'invention concerne aussi un ensemble 74 pour grue à tour représenté à la figure 5, l'ensemble 74 comprenant un premier élément structurel 76 de flèche et un second élément structurel 78 de flèche qui s'étendent chacun globalement horizontalement, perpendiculairement au mât, dans une position d'utilisation normale de la grue.The invention also relates to a set 74 for tower crane shown in FIG. figure 5 , the assembly 74 comprising a first boom structural member 76 and a second boom structural member 78 which each extend generally horizontally, perpendicular to the mast, in a normal use position of the crane.

Le premier élément structurel 76 et le second élément structurel 78 de flèche présentent ici une section triangulaire et ils sont constitués chacun de trois membrures 79 reliées entre elles par un treillis.The first structural element 76 and the second boom structural element 78 here have a triangular section and they each consist of three members 79 interconnected by a lattice.

De plus, Le premier élément structurel 76 et le second élément structurel 78 de flèche sont destinés à être assemblés bout à bout au moyen d'un dispositif d'éclissage 14 similaire au dispositif d'éclissage 14 précédemment décrit, le dispositif d'éclissage 14 comportant une première éclisse 82 et une seconde éclisse 84 à lumière 56 soudée du type décrite précédemment.In addition, the first structural element 76 and the second boom structural element 78 are intended to be assembled end to end by means of a splinting device 14 similar to the splinting device 14 previously described, the splinting device 14 having a first splice 82 and a second splice 84 56 welded light of the type described above.

La présente description de l'invention est donnée à titre d'exemple non limitatif.The present description of the invention is given by way of non-limiting example.

On comprendra que l'invention vise aussi à s'appliquer à tout élément structurel devant être lié à un autre élément structurel par éclissage, par l'intermédiaire d'au moins une membrure, comme cela est défini dans et limité par les revendications.It will be understood that the invention is also intended to apply to any structural member to be bonded to another structural member by splicing, via at least one chord, as defined in and limited by the claims.

Claims (8)

  1. A fish-plating device (14) for linking a first structural element (12a) on a second structural element (12b) of a tower crane, the device including at least one fishplate (26) extending along a main axis (A), from a base portion (34) connected on a member (16a) of the first structural element (12a) by a primary weld bead (70), to a connecting portion (38) protruding from a free end of said member (16a) along the main axis (A), and which is designed to be linked on a member (16b) of the second structural element (12b)
    characterized in that the base portion (34) of the fishplate (26) has a slot (56) which is delimited by a peripheral wall (57) linked on the member (16a) of the first structural element (12a) by a secondary weld bead (72), to limit the mechanical stresses on the primary weld bead (70).
  2. The fish-plating device (14) according to claim 1, characterized in that the base portion (34) of the fishplate (26) has a distal segment (52) which is connected on the connecting portion (38), and a U-shaped proximal segment (54) having a free end with a generally rounded shape, the slot (56) being formed in said rounded free end.
  3. The fish-plating device (14) according to claim 2, characterized in that the proximal segment (54) of the base portion (34) has a generally planar shape with a constant section and the distal segment (52) has an oblique ramp-shape with a generally increasing section from the proximal segment (54) to the connecting portion (38) of the fishplate (26).
  4. The fish-plating device (14) according to any one of claims 2 or 3, characterized in that the distal segment (52) of the base portion (34) is laterally delimited by two straight edges (58, 60) parallel to the main axis (A), each having a chamfer (62, 64) forming a housing (66, 68) for at least a part of the primary weld bead (70).
  5. The fish-plating device (14) according to any one of the preceding claims, characterized in that the slot (56) has a cylindrical shape.
  6. The fish-plating device (14) according to any one of the preceding claims, characterized in that the fish-plating device (14) includes at least two fishplates (26) which are secured on two opposite outer faces (20a) defined by the first structural element (12a), the two fishplates (26) delimiting a first bore (42) and a second bore which are coaxial and designed to receive a removable connecting pin (46) adapted to link the first structural element (12a) and the second structural element (12b) together.
  7. An assembly (10) for a tower crane, the assembly comprising a first structural element (12a) of mast and a second structural element (12b) of mast, the first structural element (12a) including at least one member (16a) equipped with a fish-plating device (14), according to any one of the preceding claims, which is arranged to link the first structural element (12a) on the second structural element (12b).
  8. The assembly (74) for a tower crane, the assembly (74) comprising a first structural element (76) of jib and a second structural element (78) of jib, the first structural element (76) including at least one member (79) equipped with a fish-plating device (14), according to any one of claims 1 to 7, which is arranged to link the first structural element (76) on the second structural element (78).
EP14196718.2A 2013-12-11 2014-12-08 Assembly device for connecting two structural elements of a tower crane Active EP2883829B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1362431A FR3014509B1 (en) 2013-12-11 2013-12-11 LAUNDRY DEVICE FOR BINDING TWO STRUCTURAL ELEMENTS OF A TOWER CRANE

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EP2883829A1 EP2883829A1 (en) 2015-06-17
EP2883829B1 true EP2883829B1 (en) 2016-02-24

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EP (1) EP2883829B1 (en)
KR (1) KR20150068329A (en)
CN (1) CN104709832B (en)
AU (1) AU2014271325A1 (en)
ES (1) ES2566142T3 (en)
FR (1) FR3014509B1 (en)
HK (1) HK1209716A1 (en)
RU (1) RU2014149672A (en)

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Publication number Priority date Publication date Assignee Title
CN105271018A (en) * 2015-09-30 2016-01-27 徐州建机工程机械有限公司 Detachable tower crane wrap frame
CN105271019A (en) * 2015-09-30 2016-01-27 徐州建机工程机械有限公司 Connecting structure of main chords and web members of tower crane
FR3111342B1 (en) 2020-06-12 2022-08-12 Manitowoc Crane Group France Anti-fall safety device to retain and prevent the fall of a connecting pin
CN112279119B (en) * 2020-11-04 2023-08-04 常德市荣程机械有限公司 Tower crane standard joint connecting sleeve
FR3129185B1 (en) 2021-11-15 2023-10-27 Manitowoc Crane Group France Device for assembling/disassembling a connecting pin for end-to-end assembly of two structural elements
ES2964817A1 (en) * 2022-09-08 2024-04-09 Linden Comansa S L MOORING JOINT FOR COUPLING BETWEEN STRUCTURAL MODULES OF TOWER CRANES (Machine-translation by Google Translate, not legally binding)

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FR1336224A (en) * 1962-07-16 1963-08-30 Expl Des Etablissements Boilot Splicing device
FR2135024B1 (en) * 1971-03-16 1974-03-01 Potain Sa
FR2185217A5 (en) * 1972-05-18 1973-12-28 Potain Sa
FR2680813B1 (en) * 1991-08-30 1995-10-20 Potain Sa REMOVABLE ASSEMBLY DEVICE FOR METAL FRAME ELEMENTS.
CN2219286Y (en) * 1994-12-22 1996-02-07 波丹公司 Mast structural member for tower crane
FR2781535B1 (en) * 1998-07-24 2000-08-25 Potain Sa ASSEMBLY DEVICE FOR METAL STRUCTURE MEMBERS
KR100876452B1 (en) * 2007-04-27 2008-12-29 케이엔에프중공업주식회사 Mast fasteners for tower crane
CN201850084U (en) * 2010-10-08 2011-06-01 长沙中联重工科技发展股份有限公司 Connecting structure for crane boom and upper support and crane provided therewith
CN202369293U (en) * 2011-11-30 2012-08-08 中联重科股份有限公司 Cantilever girder assembly and reinforcing plate

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HK1209716A1 (en) 2016-04-08
KR20150068329A (en) 2015-06-19
FR3014509B1 (en) 2016-01-01
CN104709832B (en) 2018-04-03
RU2014149672A (en) 2016-07-10
FR3014509A1 (en) 2015-06-12
CN104709832A (en) 2015-06-17
ES2566142T3 (en) 2016-04-11
AU2014271325A1 (en) 2015-06-25
EP2883829A1 (en) 2015-06-17

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