EP4335806A1 - Joint de fixation pour couplage entre des modules structurels de grues à tour - Google Patents

Joint de fixation pour couplage entre des modules structurels de grues à tour Download PDF

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Publication number
EP4335806A1
EP4335806A1 EP23195888.5A EP23195888A EP4335806A1 EP 4335806 A1 EP4335806 A1 EP 4335806A1 EP 23195888 A EP23195888 A EP 23195888A EP 4335806 A1 EP4335806 A1 EP 4335806A1
Authority
EP
European Patent Office
Prior art keywords
structural section
connection block
vertical beam
coupling
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23195888.5A
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German (de)
English (en)
Inventor
Alberto Munarriz Aldaz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linden Comansa SL
Original Assignee
Linden Comansa SL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linden Comansa SL filed Critical Linden Comansa SL
Publication of EP4335806A1 publication Critical patent/EP4335806A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details

Definitions

  • the present invention is related to high-rise tower cranes that are normally used in the construction of buildings, referring specifically to a joint system for attaching the couplings between structural sections making up the tower of said tower cranes, achieving joints that improve the distribution of stresses generated in the assembly couplings of the crane structure.
  • the first group that is, fixed cranes
  • the second group that is, mobile cranes
  • tower cranes Within the group of mobile cranes, a type of crane is known that is used mainly for the construction of buildings. These cranes are called tower cranes and can reach height dimensions that require assembly in phases and sections.
  • a component part of said tower cranes is the tower or mast, which is a vertical lattice structure made up of columns, generally with an H-shaped section and crosspieces, generally with a U-shaped section, said structure being assembled on an anchoring base in a composition by means of joining successive structural sections, until the desired height is reached.
  • document CN204980942 discloses a joint system using through screws and nuts, in which joining pieces are welded in the lateral areas of the ends of the columns of the structural sections making up the crane tower to be formed. Said joining pieces are in the form of bushings with through axial through holes, in such a way that the attachment between the structural sections to be joined is done by inserting attachment screws through the mentioned bushings, for which the screw bushings of the structural sections being joined must be precisely aligned in order to insert the attachment screws.
  • the underlying problem in this solution is that the position of the screw bushings is critical, since if they are not welded in the exact position it is not possible to insert the attachment screws when aligning the crane sections.
  • the fact that the screw bushings are fixed by welding can pose a risk of breakage in the case of a bad weld, which implies possible delays in the assembly and additional costs in the construction of the tower cranes used.
  • These welds represent a low degree of reliability, so if a weld is defective, there is a risk that the entire structure of the tower crane will collapse once it is assembled, with the consequent danger to operators and objects around the crane installation.
  • the present invention proposes a structural section of a tower crane consisting of latticework with an attachment joint that distributes the stresses and strains efficiently at the critical points of the connections between the structural sections that are coupled together.
  • the structural crane section object of the invention comprises a attachment joint that is arranged in the coupling of the ends of the vertical beams of the structural sections to be joined.
  • Said coupling comprises a flat base fixed to a connection block, the flat base covering a perimeter of said connection block, the block being fixable by welding on the end of each vertical beam of the structural section to be attached, at least two ends of the connection block protruding with respect to the projection of the column, said ends comprising a through hole for the introduction of a screw for attachment with a connection block of a contiguous structural section, the flat surface of the flat base of a structural section remaining in the assembly position in direct contact with the flat base of the adjoining structural section.
  • This set of elements intends to avoid the concentration of stress in the main profile and a transition of stress in the rigidity of the support, avoiding the breakages that could be generated as a result of the aforementioned stress.
  • connection block provides more material for the distribution of and resistance against stress through screwing.
  • the base plate preferably polygonal, provides a greater contact surface between couplings than the connection block, improving the distribution of stresses as there is a greater contact surface between base plates of crane sections in the coupling thereof.
  • the pressure cone of the screwed joint and its corresponding distribution coefficient are improved.
  • it allows greater control of assembly tolerances between sections, since it is easier to machine this contact surface between sections to ensure assembly tolerances and joint flatness.
  • the protruding ends of the connection block protruding being understood as the fact that in a cross-section of the vertical beam they protrude perpendicularly from the projection of said vertical beam, said protruding ends preferably being rectangular in shape. Said ends are those that comprise holes for fixing with attachment screws.
  • said block comprises four protruding ends forming a cross-shaped configuration, also with holes at said ends for the inclusion of the attachment screws.
  • the attachment joint is complemented by reinforcements, comprising fixed to each side of the web of the vertical beam a transverse U-shaped plate fixed laterally to the flanges and at its bottom to the web of the vertical beam, remaining in a position transverse to the beam.
  • This reinforcement allows the transition of stresses in the interior reinforcements to be homogeneous.
  • the attachment joint comprises an additional reinforcement in the form of a vertical plate that is fixed to the vertical beam between the connection block and the transverse U-shaped plate, fixed with its sides on the inner surface of the flanges of the vertical beam parallel to its web.
  • This vertical plate provides rigidity to the beam profile, which will preferably be an HEB profile, providing rigidity in the direction with less rigidity due to the different thicknesses of the HEB profile.
  • the transverse reinforcement in this case, prevents stress peaks from being generated at the upper end of the vertical plate.
  • the attachment joint of the structural section comprises a plurality of side plates that are fixed to the sides of the protruding ends of the connection block and to the vertical beam.
  • Said lateral reinforcements will preferably have a curved transition from the vertical to the horizontal plane that allows the transfer of stresses, with the reinforcements being stressed instead of loading the welds, which are always the weakest parts of any structure.
  • the attachment joint of the crane section comprises a central alignment hole in the assembly consisting of the flat base and the connection block which, by introducing an alignment piece, allows the assembly to be aligned by means of inserting said part into each central alignment hole corresponding to each crane section to be joined.
  • This entire set of elements that make up the attachment joints according to the invention allows a behavior of the joints with a higher level of reliability and safety, since each element helps to better dissipate and distribute the mechanical stresses and strains that occur in the joint couplings between the structural sections of applicable tower cranes, both in the working state and in the rest state.
  • the base plate of the joints facilitates the correct assembly of the joint couplings between the structural sections being joined, allowing assembly times to be reduced and, consequently, cost savings.
  • the object of the invention relates to a coupling (1) to join structural sections (2) making up a tower (14) in tower cranes that are generally used in the construction of building which, as shown in Figure 1 , comprise a tall tower (14), which is arranged on an anchoring base (13), with a slewing ring (15) being incorporated in the upper part of the tower (14), on which there is incorporated a jib (16) with a gripping device (19) for hanging the loads that have to be moved with the crane, and in the opposite part a counter-jib (17) provided with counterweights (18) to level the structure of the crane in the vertical mounting position and in the working function.
  • the tower (14) consisting of a lattice structure made up of columns, normally consisting of H-shaped section profiles, which are joined together by crosspieces consisting of profiles generally having a U-shaped section.
  • said tower (14) is formed by means of joining successive structural sections (2) ( Figure 2 ), up to the necessary length, conventionally joining the component structural sections (2) by means of couplings (1) in which fastening attachments are established by means of bolts or screws with nuts that are arranged through bushings fixed by external welding on the columns of the structural sections (2).
  • the invention proposes a structural section (2) with an attachment joint that allows a more homogeneous distribution of stresses and strains that occur at the critical junction points between the structural sections (2) of the crane tower (14) that is formed by means of joining successive structural sections (2).
  • the joint between the structural sections (2) in the couplings (1) of the lattice nodes is carried out by said attachment joint of the structural section (2) object of the invention.
  • This joint is established by means of screwing that is established between the ends of the vertical beams (10) of the structural sections (2) to be joined.
  • Said attachment joint has a flat base (3) and a connection block (4) that are preferably fixed together by welding, to later fix the corresponding vertical beam (10) on the connection block (4).
  • connection block is rectangular in shape, with protruding ends that include through holes in which the attachment screws are arranged.
  • the flat base (3) of a crane section (2) is arranged in contact with the flat base (3') of a contiguous crane section (2') to later join both sections (2, 2') in its coupling (1) by means of screwing. Therefore, it results in an easy-to-assemble embodiment, which further allows the flat base (3) to be machined for adaptation to irregularities in the ground or to different manufacturing tolerances.
  • reinforcing elements are incorporated into said attachment joints. It therefore comprises a transverse U-shaped plate (5) that is fixed to the vertical beam (10) with its sides fixed by welding to the flanges of the vertical beam (10) and its bottom fixed to the web of the vertical beam (10). Subsequently, a vertical plate (6) is fixed to the inside of the flanges of the vertical beam (10) parallel to the web and between the connection block (4) and the aforementioned U-shaped transverse plate (5).
  • This vertical plate (6) preferably comprises an upper termination with a relevant U-shaped groove so as not to accumulate mechanical stress.
  • stress reducing side plates (7) which are fixed to the sides of the connection block (4) and on the outer surface of the vertical beam (10) of the structural section (2).
  • These side plates (7) preferably comprise a curved transition from the vertical to the horizontal plane that allows stress to be transferred.
  • the assembly of the flat base (3) and the connection block (4) of the couplings (1) are cross-shaped. Through holes are arranged in each of the arms of the cross to introduce four attachment screws in the joints, thereby ensuring more resistant joints, when establishing the attachment with a greater number of screws.
  • the corresponding reinforcements (5, 6 and 7) will be arranged in this embodiment.
  • the method of assembling the attachment joints in the couplings (1) between the structural sections (2) to be joined is the same, in such a way that the flat base (3) and the connection block (4) are welded together, and then the vertical beam (10) and corresponding crosspiece (11) of the structural section (2) are welded to the connection block (4). Subsequently, the vertical plate (6) is welded on the connection block (4) and to the column of the structural section (2), in the inner part of the profile of the vertical beam (10) of the structural section (2), to then weld the transverse U-shaped plate (5) on the column of the structural section (2) at the end of the vertical plate (6).
  • the stress reducing plates (7) are welded to the vertical beam (10) of the structural section (2) on the sides of the protruding ends of the connection block (4).
  • an alignment piece (8) is also foreseen, said piece being included through a central hole (9) of the assembly consisting of the flat base (3) and the connection block (4), to guarantee that the structural sections (2, 2') that are joined together are correctly aligned in the coupling (1) between them, as shown in Figure 8 .
  • the use of said alignment piece (8) can be critical at the joints between the structural sections (2, 2'), in applications in which large weights have to be handled with the applicable tower crane and when the tower crane is exposed to adverse weather conditions, for example, strong winds, or if the supporting ground suffers from vibrations.
  • attachment joint according to the invention has been described in particular for the attachment coupling between structural sections (2) of the longitudinal composition of a crane tower, this attachment joint can also be used for other joint couplings between parts of a structural assembly, such as the attachment joint between the tower (14) and the anchoring base (10) of a crane or other similar joints, within the same concept of the invention.
EP23195888.5A 2022-09-08 2023-09-07 Joint de fixation pour couplage entre des modules structurels de grues à tour Pending EP4335806A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES202230798A ES2964817A1 (es) 2022-09-08 2022-09-08 Union de amarre para acoplamiento entre modulos estructurales de gruas torre

Publications (1)

Publication Number Publication Date
EP4335806A1 true EP4335806A1 (fr) 2024-03-13

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EP23195888.5A Pending EP4335806A1 (fr) 2022-09-08 2023-09-07 Joint de fixation pour couplage entre des modules structurels de grues à tour

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EP (1) EP4335806A1 (fr)
ES (1) ES2964817A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050001131A1 (en) * 2003-07-03 2005-01-06 Stevens James A. Method and apparatus for tower reinforcement system
US7156245B2 (en) * 2003-04-17 2007-01-02 Potain Device for demountable assembly of the jib elements of a tower crane
CN201525710U (zh) * 2009-10-22 2010-07-14 浙江虎霸建设机械有限公司 塔式起重机标准节接头
ES1074015U (es) * 2011-01-12 2011-03-14 Daniel Cánovas Martínez Dispositivo de unión de tramos de grúas.
AU2014271325A1 (en) * 2013-12-11 2015-06-25 Manitowoc Crane Group France A fish-plating device for connecting two structural elements of a tower crane
CN204980942U (zh) 2015-07-03 2016-01-20 广西建工集团建筑机械制造有限责任公司 一种定位螺栓连接的塔式起重机标准节
EP3184479A1 (fr) * 2015-12-22 2017-06-28 GP Autolift S.r.l. Élément modulaire en forme de treillis avec assemblage simplifié pour tour des grues à tour et tour comprenant un tel élément modulaire

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CN201756420U (zh) * 2009-11-29 2011-03-09 周明忠 连接套加强板
CN202284124U (zh) * 2011-10-25 2012-06-27 山东大汉建设机械有限公司 方管形标准节主弦杆加强板
CN203359838U (zh) * 2013-06-07 2013-12-25 四川建设机械（集团）股份有限公司 直角型钢杆件及其加强板
CN103466470B (zh) * 2013-09-11 2015-09-16 中联重科股份有限公司 主弦杆及具有其的标准节、塔式起重机
CN209352468U (zh) * 2018-10-11 2019-09-06 湖北江汉建筑工程机械有限公司 一种塔机标准节
CN210419022U (zh) * 2019-05-06 2020-04-28 江苏腾发建筑机械有限公司 一种更具有安全性能的塔吊标准节
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Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7156245B2 (en) * 2003-04-17 2007-01-02 Potain Device for demountable assembly of the jib elements of a tower crane
US20050001131A1 (en) * 2003-07-03 2005-01-06 Stevens James A. Method and apparatus for tower reinforcement system
CN201525710U (zh) * 2009-10-22 2010-07-14 浙江虎霸建设机械有限公司 塔式起重机标准节接头
ES1074015U (es) * 2011-01-12 2011-03-14 Daniel Cánovas Martínez Dispositivo de unión de tramos de grúas.
AU2014271325A1 (en) * 2013-12-11 2015-06-25 Manitowoc Crane Group France A fish-plating device for connecting two structural elements of a tower crane
CN204980942U (zh) 2015-07-03 2016-01-20 广西建工集团建筑机械制造有限责任公司 一种定位螺栓连接的塔式起重机标准节
EP3184479A1 (fr) * 2015-12-22 2017-06-28 GP Autolift S.r.l. Élément modulaire en forme de treillis avec assemblage simplifié pour tour des grues à tour et tour comprenant un tel élément modulaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SALMASI ALIREZA ET AL: "Performance of Fully Restrained Welded Beam-Column Connections Subjected to Column Loss", INTERNATIONAL JOURNAL OF STEEL STRUCTURES, SPRINGER BERLIN HEIDELBERG, BERLIN/HEIDELBERG, vol. 21, no. 4, 3 July 2021 (2021-07-03), pages 1370 - 1382, XP037529979, ISSN: 1598-2351, [retrieved on 20210703], DOI: 10.1007/S13296-021-00505-X *

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