EP2738134A1 - Jib/counter-jib structure for a free-standing tower crane - Google Patents

Jib/counter-jib structure for a free-standing tower crane Download PDF

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Publication number
EP2738134A1
EP2738134A1 EP12818019.7A EP12818019A EP2738134A1 EP 2738134 A1 EP2738134 A1 EP 2738134A1 EP 12818019 A EP12818019 A EP 12818019A EP 2738134 A1 EP2738134 A1 EP 2738134A1
Authority
EP
European Patent Office
Prior art keywords
jib
lattice structure
counter
tower crane
flat top
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.)
Granted
Application number
EP12818019.7A
Other languages
German (de)
French (fr)
Other versions
EP2738134B1 (en
EP2738134A4 (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
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Linden Comansa SL
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Publication date
Application filed by Linden Comansa SL filed Critical Linden Comansa SL
Publication of EP2738134A1 publication Critical patent/EP2738134A1/en
Publication of EP2738134A4 publication Critical patent/EP2738134A4/en
Application granted granted Critical
Publication of EP2738134B1 publication Critical patent/EP2738134B1/en
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Anticipated expiration legal-status Critical

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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
    • 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
    • B66C23/64—Jibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths

Definitions

  • the present invention relates to tower cranes that are fundamentally used in construction work sites, proposing a jib or counter-jib structure for flat top cranes with an embodiment that provides technical and economic advantages with respect to the solutions used today in forming said structures.
  • a tower crane is a discontinuously operating piece of hoist equipment intended for hoisting and distributing in space loads suspended from a hook or from any other holding means.
  • These cranes are most commonly used in construction work sites, their installation being temporary, so they are usually subjected to regular assemblies, dismantlings and transfers.
  • Such cranes are formed by a series of fundamental structural parts which are: base, tower, slewing platform, jib, counter-jib, counterweight, head section, ballast, jib trolley and load holding element.
  • the base is the element bearing the crane tower and the ballast which is necessary for assuring stability.
  • the tower is a vertical structure comprised between the base and the upper portion of the crane.
  • the slewing platform is a structure that can be oriented as a result of a slewing bearing located in the upper part of the tower.
  • the jib is a structural component capable of bearing the hoist loads in the corresponding ranges.
  • the counter-jib is a structural component bearing the counterweight of the crane.
  • the counterweight is a mass which is secured in the counter-jib and the function of which is to counteract and balance part of the actions of the payload and some parts of the crane during operation.
  • the tower head section is a structural element integrating the slewing part and is capable of bearing and transmitting forces from the jib and counter-jib structures.
  • the ballast is a mass which is secured at the base for the purpose of stabilizing the structural assembly of the crane.
  • the jib trolley is a device carrying the load holding member, said trolley being moveable along the jib.
  • the holding member is a device the purpose of which is load suspension, being able to be in the form of a hook, a bucket, an electromagnet, etc., depending on the type of loads to be handled with the crane.
  • braced tower cranes Two main versions of tower cranes, i.e., braced and flat top cranes , are known today; braced tower cranes using a large tower head section to which tensioning braces which aid in bearing part of the crane's weight and part of the load transmitted by the jib and counter-jib structures are secured; whereas flat top tower cranes use a tower head section that is smaller than the equivalent tower head section of braced tower cranes.
  • a jib and/or counter-jib structure of a flat top tower crane is proposed, whereby features providing advantages for forming cranes of this type which have a great capacity and are easy to transport are achieved.
  • This structure object of the invention is formed by partial sections which allow forming a jib or a counter-jib by means of successively connecting identical sections, each section comprising a lower lattice structure forming end couplings intended for connecting with other consecutive sections, and an upper lattice structure formed by panels that are arranged in an articulated or removable manner on the lower lattice structure, these panels incorporating on the edge opposite the edge connected with the lower lattice structure couplings for connecting with one another and in turn for connecting with other consecutive sections; the lower lattice structure forming a truncated pyramid formation, whereas the upper lattice structure forms a formation having a triangular profile on the upper base of the lower lattice structure.
  • a structure in the sections of which the panels of the upper lattice structure can be dismantled or collapsed on the sides of the lower lattice structure is thus obtained, whereby said sections forming the structure can be transported in small-sized containers to form the sections of the structure with a large cross-section, and therefore being very strong, once they are at the destination by means of deploying or assembling the panels of the upper structure.
  • the proposed structure therefore has very advantageous features for forming jibs and counter-jibs of high capacity flat top tower cranes, acquiring its own identity and preferred character for said application.
  • the object of the invention relates to a structure intended for forming a jib or a counter-jib for a flat top tower crane, for example of the type structured by a jib (1), a counter-jib (2), a tower head section (3), a counterweight (4), a slewing part (5), a tower (6) and a base (7), such as that depicted in Figure 2 .
  • the purpose of said structure object of the invention is to allow the construction of tower cranes of this type with a capacity similar to that of large tower cranes provided with a brace (8), such as that depicted in Figure 1 , the jib (1) and the counter-jib (2) having a structural strength that allows eliminating the braces (8) and, therefore reducing the tower head section (3), and at the same time with an embodiment that allows collapsing or dismantling for transport in conventional containers.
  • the proposed structure is formed by partial sections that allow forming a jib (1) or a counter-jib (2) by means of successively connecting identical sections.
  • Each partial section of said structure object of the invention ( Figures 3 and 4 ) comprises a lower lattice structure (9) formed according to a truncated pyramid formation, and an upper lattice structure (10) that is arranged forming a formation having a triangular profile on said lower structure (9).
  • the lower lattice structure (9) is formed by a fixed structural assembly having end couplings (11) for connecting with other consecutive sections; whereas the upper lattice structure (10) is formed by side panels (12) which are connected by an edge to the upper part of the lower lattice structure (9) by means of couplings (13) that can be articulated or removable, whereas on the other edge said panels (12) have other couplings (14) for connecting with one another and with other consecutive sections.
  • the sections forming the proposed structure have a large cross-section and are therefore very strong, allowing the formation of jibs (1) and counter-jibs (2) to be suitable for flat top tower cranes having a large load capacity.
  • the panels (12) of the upper lattice structure (10) can de dismantled from the lower lattice structure (9) or lowered onto the sides thereof in a simple and quick manner, which allows transporting the sections forming the structure in small-sized conventional containers, thus facilitating the transport of the cranes between their different use locations.

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

Abstract

The present invention relates to a jib/counter-jib structure for a flat top tower crane, formed by partial sections, each of which comprises a fixed lower lattice structure (9) provided with end couplings (11) for connecting with other consecutive sections, and an upper lattice structure (10) formed by side panels (12), which are connected to the lower lattice structure (9) by means of articulated or removable couplings (13), such that said panels (12) of the upper lattice structure (10) can be removed or lowered with respect to the lower lattice structure (9) for transporting the section.

Description

    Sector of the Art
  • The present invention relates to tower cranes that are fundamentally used in construction work sites, proposing a jib or counter-jib structure for flat top cranes with an embodiment that provides technical and economic advantages with respect to the solutions used today in forming said structures.
    • State of the Art
  • A tower crane is a discontinuously operating piece of hoist equipment intended for hoisting and distributing in space loads suspended from a hook or from any other holding means. These cranes are most commonly used in construction work sites, their installation being temporary, so they are usually subjected to regular assemblies, dismantlings and transfers.
  • Such cranes are formed by a series of fundamental structural parts which are: base, tower, slewing platform, jib, counter-jib, counterweight, head section, ballast, jib trolley and load holding element.
  • The base is the element bearing the crane tower and the ballast which is necessary for assuring stability.
  • The tower is a vertical structure comprised between the base and the upper portion of the crane.
  • The slewing platform is a structure that can be oriented as a result of a slewing bearing located in the upper part of the tower.
  • The jib is a structural component capable of bearing the hoist loads in the corresponding ranges.
  • The counter-jib is a structural component bearing the counterweight of the crane.
  • The counterweight is a mass which is secured in the counter-jib and the function of which is to counteract and balance part of the actions of the payload and some parts of the crane during operation.
  • The tower head section is a structural element integrating the slewing part and is capable of bearing and transmitting forces from the jib and counter-jib structures.
  • The ballast is a mass which is secured at the base for the purpose of stabilizing the structural assembly of the crane.
  • The jib trolley is a device carrying the load holding member, said trolley being moveable along the jib.
  • The holding member is a device the purpose of which is load suspension, being able to be in the form of a hook, a bucket, an electromagnet, etc., depending on the type of loads to be handled with the crane.
  • Two main versions of tower cranes, i.e., braced and flat top cranes , are known today; braced tower cranes using a large tower head section to which tensioning braces which aid in bearing part of the crane's weight and part of the load transmitted by the jib and counter-jib structures are secured; whereas flat top tower cranes use a tower head section that is smaller than the equivalent tower head section of braced tower cranes.
  • Large tower cranes (with a capacity greater than 750 Tm) were conventionally designed with the braced solution because the jib structure of such cranes requires dimensions that are smaller than the equivalent thereof in a flat top tower crane, this smaller size allowing transport in conventional containers, which is impossible with flat top tower cranes, due to the size of the jib structure such cranes require for large capacities.
    • Object of the Invention
  • According to the invention, a jib and/or counter-jib structure of a flat top tower crane is proposed, whereby features providing advantages for forming cranes of this type which have a great capacity and are easy to transport are achieved.
  • This structure object of the invention is formed by partial sections which allow forming a jib or a counter-jib by means of successively connecting identical sections, each section comprising a lower lattice structure forming end couplings intended for connecting with other consecutive sections, and an upper lattice structure formed by panels that are arranged in an articulated or removable manner on the lower lattice structure, these panels incorporating on the edge opposite the edge connected with the lower lattice structure couplings for connecting with one another and in turn for connecting with other consecutive sections; the lower lattice structure forming a truncated pyramid formation, whereas the upper lattice structure forms a formation having a triangular profile on the upper base of the lower lattice structure.
  • A structure in the sections of which the panels of the upper lattice structure can be dismantled or collapsed on the sides of the lower lattice structure is thus obtained, whereby said sections forming the structure can be transported in small-sized containers to form the sections of the structure with a large cross-section, and therefore being very strong, once they are at the destination by means of deploying or assembling the panels of the upper structure.
  • The proposed structure therefore has very advantageous features for forming jibs and counter-jibs of high capacity flat top tower cranes, acquiring its own identity and preferred character for said application.
    • Description of the Drawings
    • Figure 1 shows a general diagram of the structural parts of a conventional braced tower crane.
    • Figure 2 is a general diagram of the structural parts of a conventional flat top tower crane.
    • Figure 3 is a perspective view of a detail of a structural section according to the object of the invention in a collapsed position.
    • Figure 4 is a perspective view of a detail of the structural section of the preceding figure in a deployed position.
    Detailed Description of the Invention
  • The object of the invention relates to a structure intended for forming a jib or a counter-jib for a flat top tower crane, for example of the type structured by a jib (1), a counter-jib (2), a tower head section (3), a counterweight (4), a slewing part (5), a tower (6) and a base (7), such as that depicted in Figure 2.
  • The purpose of said structure object of the invention is to allow the construction of tower cranes of this type with a capacity similar to that of large tower cranes provided with a brace (8), such as that depicted in Figure 1, the jib (1) and the counter-jib (2) having a structural strength that allows eliminating the braces (8) and, therefore reducing the tower head section (3), and at the same time with an embodiment that allows collapsing or dismantling for transport in conventional containers.
  • The proposed structure is formed by partial sections that allow forming a jib (1) or a counter-jib (2) by means of successively connecting identical sections.
  • Each partial section of said structure object of the invention (Figures 3 and 4) comprises a lower lattice structure (9) formed according to a truncated pyramid formation, and an upper lattice structure (10) that is arranged forming a formation having a triangular profile on said lower structure (9).
  • The lower lattice structure (9) is formed by a fixed structural assembly having end couplings (11) for connecting with other consecutive sections; whereas the upper lattice structure (10) is formed by side panels (12) which are connected by an edge to the upper part of the lower lattice structure (9) by means of couplings (13) that can be articulated or removable, whereas on the other edge said panels (12) have other couplings (14) for connecting with one another and with other consecutive sections.
  • With this formation, the sections forming the proposed structure have a large cross-section and are therefore very strong, allowing the formation of jibs (1) and counter-jibs (2) to be suitable for flat top tower cranes having a large load capacity.
  • However, the panels (12) of the upper lattice structure (10) can de dismantled from the lower lattice structure (9) or lowered onto the sides thereof in a simple and quick manner, which allows transporting the sections forming the structure in small-sized conventional containers, thus facilitating the transport of the cranes between their different use locations.

Claims (5)

  1. A jib/counter-jib structure for a flat top tower crane, formed by partial sections that can be connected consecutively to form a jib or a counter-jib, characterized in that each partial section comprises a fixed lower lattice structure (9) having end couplings (11) for connecting with other consecutive sections, and an upper lattice structure (10) formed by side panels (12) that are connected to the lower lattice structure (9) by means of articulated or removable couplings (13), said panels (12) incorporating on the edge opposite the edge connected with the lower lattice structure (9) couplings (14) for connecting with one another and with other consecutive sections.
  2. The jib/counter-jib structure for a flat top tower crane according to claim 1, characterized in that the lower lattice structure (9) forms a truncated pyramid formation on which the upper lattice structure (10) is incorporated.
  3. The jib/counter-jib structure for a flat top tower crane according to claim 1, characterized in that the upper lattice structure (10) forms a formation having a triangular profile on the lower lattice structure (9).
  4. The jib/counter-jib structure for a flat top tower crane according to claim 1, characterized in that the panels (12) of the upper lattice structure (10) can be removed with respect to the lower lattice structure (9).
  5. The jib/counter-jib structure for a flat top tower crane according to claim 1, characterized in that the panels (12) of the upper lattice structure (10) can be lowered onto the sides of the lower lattice structure (9).
EP12818019.7A 2011-07-28 2012-07-12 Jib/counter-jib structure for a free-standing tower crane Active EP2738134B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201100860A ES2397325B1 (en) 2011-07-28 2011-07-28 FEATHER-COUNTERPLUMA STRUCTURE FOR TOWER CRANE WITHOUT STRIPS.
PCT/ES2012/000191 WO2013014302A1 (en) 2011-07-28 2012-07-12 Jib/counter-jib structure for a free-standing tower crane

Publications (3)

Publication Number Publication Date
EP2738134A1 true EP2738134A1 (en) 2014-06-04
EP2738134A4 EP2738134A4 (en) 2015-02-11
EP2738134B1 EP2738134B1 (en) 2016-05-11

Family

ID=47600546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12818019.7A Active EP2738134B1 (en) 2011-07-28 2012-07-12 Jib/counter-jib structure for a free-standing tower crane

Country Status (3)

Country Link
EP (1) EP2738134B1 (en)
ES (2) ES2397325B1 (en)
WO (1) WO2013014302A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742855A (en) * 1950-11-28 1956-01-04 Vicente Rogla Altet Improvements in structures capable of being dismantled
US20040238471A1 (en) * 2003-04-17 2004-12-02 Potain Device for demountable assembly of the jib elements of a tower crane
CN101434369A (en) * 2008-09-19 2009-05-20 沈阳建筑大学 Flat top tower crane with tetragon cross section boom support
EP2067737A1 (en) * 2007-12-05 2009-06-10 Liebherr-Werk Ehingen GmbH Side bracing for a grid extension of a crane
DE102008048145A1 (en) * 2008-09-19 2010-10-07 Ingenieurbüro Burgdorf GmbH Boom part for tower crane, has lower-, right-, and left framework sections flexibly connected with each other and disassembled into three pieces, where all joints between framework sections are releasable to fold boom part together

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE337089B (en) * 1970-01-27 1971-07-26 Linden Alimak Ab
CN2695424Y (en) * 2004-04-06 2005-04-27 赵凤才 Tower crane
CN201762034U (en) * 2010-07-27 2011-03-16 湘潭市江大机械制造有限公司 Embedded combination self lifting type tower crane

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742855A (en) * 1950-11-28 1956-01-04 Vicente Rogla Altet Improvements in structures capable of being dismantled
US20040238471A1 (en) * 2003-04-17 2004-12-02 Potain Device for demountable assembly of the jib elements of a tower crane
EP2067737A1 (en) * 2007-12-05 2009-06-10 Liebherr-Werk Ehingen GmbH Side bracing for a grid extension of a crane
CN101434369A (en) * 2008-09-19 2009-05-20 沈阳建筑大学 Flat top tower crane with tetragon cross section boom support
DE102008048145A1 (en) * 2008-09-19 2010-10-07 Ingenieurbüro Burgdorf GmbH Boom part for tower crane, has lower-, right-, and left framework sections flexibly connected with each other and disassembled into three pieces, where all joints between framework sections are releasable to fold boom part together

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2013014302A1 *

Also Published As

Publication number Publication date
ES2581858T3 (en) 2016-09-07
EP2738134B1 (en) 2016-05-11
WO2013014302A1 (en) 2013-01-31
EP2738134A4 (en) 2015-02-11
ES2397325A1 (en) 2013-03-06
ES2397325B1 (en) 2013-11-15

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