EP2415704A1 - Plateforme auto-élévatrice pour la construction. - Google Patents

Plateforme auto-élévatrice pour la construction. Download PDF

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Publication number
EP2415704A1
EP2415704A1 EP11176645A EP11176645A EP2415704A1 EP 2415704 A1 EP2415704 A1 EP 2415704A1 EP 11176645 A EP11176645 A EP 11176645A EP 11176645 A EP11176645 A EP 11176645A EP 2415704 A1 EP2415704 A1 EP 2415704A1
Authority
EP
European Patent Office
Prior art keywords
frame
columns
lifting
engagement
structure according
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.)
Withdrawn
Application number
EP11176645A
Other languages
German (de)
English (en)
Inventor
Corrado Dalla Benetta
Giulio Berra
Alberto Dalla Benetta
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.)
Gru Dalbe Srl
Original Assignee
Gru Dalbe Srl
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 Gru Dalbe Srl filed Critical Gru Dalbe Srl
Publication of EP2415704A1 publication Critical patent/EP2415704A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
    • B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
    • B66F1/08—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being operated by fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G2005/008—Hoisting devices specially adapted as part of a scaffold system

Definitions

  • the present invention relates to a self-lifting support structure for the building industry.
  • the invention relates to a self-lifting support structure for the building industry, which structure is particularly effective for defining a lifting support plane, which can receive for instance the base of a building crane.
  • Structures that can be disassembled for instance tubular scaffolds, or fixed structures, for instance temporary structures of concrete, may meet such needs, but they demand a long time for being made and consequently cause an increase in the working costs.
  • the known structures generally have the drawback that they permanently occupy the ground on which they are installed, thereby obstructing the passage of vehicles and people.
  • IT-U-258953 discloses an example of a self-propelling crane, incorporating a lifting structure integral with the base frame.
  • Cranes with a base whose height is adjustable are also disclosed in DE 202004011443 U and DE 202006013743 U .
  • the lifting structure is directly integrated into the base platform of the crane itself and thus it cannot be employed for other purposes, such as for instance lifting other building machines or different cranes.
  • Self-lifting modular building scaffolds are also known from US 2005/183905 A1 , US 5 579 865 A and US 6 749 041 B1 . Such scaffolds are however intended for lifting workers and small equipment to be used by people working on the scaffold, and therefore they cannot be employed for lifting a crane.
  • the support structure according to the invention comprises modular components, allowing the height of the vertical columns and/or the overall dimensions of the horizontal frame to be varied, thereby allowing use of the same structure in several circumstances and for lifting cranes of different kinds and sizes and to different heights.
  • the structure according to the invention is suitable to define a lifting support base, which is cheap and simple to be manufactured and managed and which can be used in the building industry for several applications and, in particular, for lifting and positioning a crane at a desired height, while leaving the passage below free, for instance for vehicles and people.
  • the vertical columns are preferably obtained by arranging elementary column portions one on the other, so that the support structure can be lifted to the preferred level simply by using the proper number of said elementary column portions.
  • the lifting device includes an engagement terminal removably associated with an engagement element in a corresponding column, and the column further includes a plurality of said engagement elements, thereby allowing the frame to be lifted to the desired height by using a lifting device with reduced extension.
  • a further advantage of the invention is that the lifting device can be separated from the structure and can therefore be employed for lifting other structures in other sites.
  • the structure according to the invention may advantageously be installed also in the presence of slopes, thanks to the modularity of the columns.
  • FIG. 1 there is shown a preferred embodiment of the self-lifting support structure for the building industry according to the invention.
  • Said structure has been generally denoted by reference numeral 11 and it substantially comprises a group of vertical support columns 13 and a horizontal frame 15, capable of vertically displacing relative to vertical support columns 13 thanks to a removable lifting mechanism 17 positioned between columns 13 and frame 15.
  • Horizontal frame 15 comprises a plurality of beams 19 associated, preferably in removable manner, with cursors 21 positioned at the corners of frame 15 and vertically displaceable with respect to vertical columns 13.
  • frame 15 has a substantially square shape and structure 11 has four columns 13, arranged at the corners of the square defined by the frame.
  • frame 15 has a substantially square shape and structure 11 has four columns 13, arranged at the corners of the square defined by the frame.
  • other shapes of frame 15 are possible, for instance a triangular, rectangular, hexagonal shape etc., and moreover structure 11 can include a number of columns different from the number of corners defined by the frame shape.
  • cursors 21 are made so as to define an aperture having a shape complementary to the transverse section of the body of column 13, a square shape in the illustrated example, whereby cursor 21 encircles column 13 and is vertically displaceable by sliding with respect to it.
  • cursors 21 are equipped with idle wheels 23, arranged with the rolling surfaces in contact with the surfaces of columns 13.
  • beams 19 of frame 15 are extendable and they will be made for instance of two or more telescopic elements 19a, 19b provided with bores 25 in which locking members, e.g. locking pegs 27, preventing the telescopic elements from mutually sliding, can be received.
  • locking members e.g. locking pegs 27, preventing the telescopic elements from mutually sliding
  • frame 15 defines a corresponding peripheral border and preferably is has no internal elements connecting peripheral beams 19, to the advantage of the lightness and adaptability of the size of frame 15 to cranes and machines of different sizes.
  • Internal connecting elements for the beams can be provided if this is made necessary by the weights to be supported, for instance in case of use of the invention as a parking platform, a footbridge and so on.
  • the size of the area of the horizontal surface defined inside frame 15 can be modified at will, depending on the needs.
  • frame 15 may have either a square shape, where the four beams 19 are all configured with the same length, or a rectangular shape, where two parallel beams 19 are configured with a different length with respect to the other two beams.
  • each cursor 21 further comprises a support element in the form of a horizontal bracket 29, directed towards the interior of frame 15 substantially along the diagonals connecting the corners of the border, e.g. square or rectangular, defined by said frame.
  • said bracket 29 defines a corresponding supporting surface, for instance of a supporting plane, which can occupy wholly or in part the area inside the peripheral border defined by said frame 15, or for a further frame, for instance a trellis frame, or yet for the base platform of an operating machine, such as a crane or another machine, that is to be lifted to the height required in a building yard.
  • brackets 29 are used for supporting the free end of a corresponding foot 71 of base platform 73 of a crane, in this case a downward rotating folding crane.
  • Fig. 2 shows the above arrangement when frame 15 is lowered, i.e. with cursors 21 substantially at the lower end of columns 13.
  • frame 15 of the support structure can be vertically displaced, i.e. lifted or lowered along columns 13, by means of a lifting mechanism 17, before or preferably after feet 71 of the crane or another load have been placed on brackets 29 when frame 15 is at a height suitable for that purpose.
  • Fig. 3 shows a configuration in which frame 15, and consequently base platform 73 of the crane, have been lifted by an amount substantially corresponding to the length of a column 13 by acting on lifting mechanism 17.
  • columns 13 preferably have a variable length.
  • columns 13 can actually be varied in that such columns 13 are modular. In the example illustrated, such columns 13 are obtained by axially associating elementary column portions 13a. In the alternative, columns 13 might be extendable, e.g. they might be telescopic or folding.
  • the lower portion of columns 13, intended to rest on the ground is preferably equipped with fixed or removable supporting feet 31, preferably having a surface area greater than the cross section of the corresponding column 13 to which such feet are associated.
  • each column 13 is obtained by superimposing four portions 13a and equipping the lower portion with a supporting foot 31 through which structure 11 rests on the ground.
  • columns 13 are formed by inserting the desired number of portions 13a one above the other, by means of a male - female coupling joint 14.
  • tie rods 33 may be provided, which are preferably arranged oblique and crossing in pairs at the sides of structure 11, between frame 15 and columns 13. Said tie rods may be provided in order to stiffen structure 11 and to make it sufficiently robust to bear the weight of crane 75 and more generally the forces discharging from jib 77 of said crane, especially when the crane is assembled and is being used.
  • FIG. 5 there is shown the arrangement of a structure 11 according to the invention, which has associated therewith a self-assembling, downward rotating folding crane 75, which is shown in operating condition, i.e. with its jib 77 open with respect to tower 79 and with stabilising ballast 81 mounted at the base of said tower.
  • a self-assembling, downward rotating folding crane 75 which is shown in operating condition, i.e. with its jib 77 open with respect to tower 79 and with stabilising ballast 81 mounted at the base of said tower.
  • structure 11 has a reduced lever arm between the supporting area on said brackets and the corresponding column.
  • the structure is thus sufficiently robust and stable for supporting e.g. a conventional building crane and in particular a self-assembling crane, such as the one shown and generally denoted by reference numeral 75.
  • FIG. 6 to 8 there is disclosed in detail an embodiment of lifting mechanism 17 by which frame 15 can be lifted to the desired height along columns 13 relative to the ground on which feet 31 of structure 11 rest.
  • Lifting mechanism 17 comprises in the upper part a first engagement terminal 35 associable with frame 15 and a second engagement terminal 37 associable with a corresponding column 13.
  • frame 15 and columns 13 comprise a first engagement element 39 capable of cooperating with said first engagement terminal 35, and a second engagement element 41 capable of cooperating with said second engagement terminal 37, respectively.
  • the first terminal 35 and the first element 39 comprise a respective flange or flange pair, 35a and 39a respectively, which have a hole for the passage of a fastening peg 43.
  • the second terminal 37 and the second element 41 comprise a horizontal foot 37a and a seat 41a, respectively, which seat is formed in the wall of column 13 and is arranged to house a portion of said foot 37a.
  • lifting mechanism 17 further comprises a hydraulic lifting device 45 equipped with a cylinder 45a and a corresponding piston 45b.
  • lifting mechanism 17 comprises four hydraulic lifting devices 45, one for each column 13.
  • cylinder 45a is associated with frame 15 in correspondence of cursor 21 thanks to the cooperation between the first engagement terminal 35 and the first engagement element 39
  • piston 45b is associated with column 13, in correspondence of one portion 13a thereof, thanks to the cooperation between the second engagement terminal 37 and the second engagement element 41.
  • the coupling between the second engagement terminal 37 and the corresponding second engagement element 41 is removable, and moreover columns 13 are equipped with at least two of said engagement elements 41 located at different heights along columns 13 in order to position terminal 41 at different heights relative to the ground on which feet 31 rest.
  • columns 13 are equipped with means for blocking the downward displacement of frame 15, consisting for instance of through pegs 47 associated with cursors 21 in correspondence of bores provided therein.
  • cursor 21 When cursor 21 has been lifted to the desired height along the corresponding column 13 by means of lifting device 45, said cursor is locked with respect to column 13 by means of pegs 47. Thereafter, the second engagement terminal 37 can be disengaged from the corresponding engagement element 41 in order to be positioned at a higher lever along column 13, once piston 45b has been retracted into cylinder 45a. In a subsequent step, and once pegs 47 have been removed, cursor 21 can again freely displace upwards and can be lifted by means of device 45.
  • the coupling between the first engagement terminal 35 and the corresponding first engagement element 39 is removable, so that, when cursor 21 has reached the desired height, lifting mechanism 17 can be removed, for instance by removing peg 43 in the illustrated example, and can possibly be used in another structure of the kind according to the invention, with clear economic advantages.
  • FIG. 9 there is shown the arrangement of structure 11 according to the invention from which the four lifting devices 45 have been removed, so that they do not cause dangers or hindrance while the crane is being used, and on which base platform 73 of a crane 75 is supported.
  • FIG. 10 there is shown a variant embodiment of lifting mechanism 17, in which the second engagement terminal 37 and the corresponding second engagement element 41 consist of a pin 37'a and a hole 41'a, respectively, both the pin and the hole being possibly threaded.
  • Fig. 11 shows a variant embodiment of lifting mechanism 17 where lifting devices 45 are associated with beams 19 in a substantially horizontal position.
  • Deflecting pulleys 48 are installed at the ends of beams 19 and are rigidly connected to the same beams.
  • a first end of a tie 50 for instance a chain, is associated with the free end of said devices 45, whereas the second end of the tie is equipped with a fastening element 46, e.g. a hook, for fastening the tie to the upper ends of columns 13.
  • a fastening element 46 e.g. a hook
  • each tie 50 will have a horizontal portion and a vertical portion with respect to deflecting pulley 48 and, by acting on devices 45, it will be possible to change the ratio between the lengths of such two portions and to obtain the upward or downward movement of structure 11.
  • This embodiment allows assembling mechanisms 17 in simple and quick manner.
  • Fig. 12 shows a variant embodiment of structure 11 where two opposite beams 19 comprise a central element 19c and two adjustable end elements 19d. Elements 19d are removably and adjustably connected to central element 19c and include cursor 21 at their ends.
  • the other two opposite beams 19 are adjustable in length and, in the illustrated example, are made of two extendable or telescopic elements 19a and 19b.
  • Lifting mechanisms 17 are mounted in pairs on central elements 19c and they comprise a device 45, pulleys 48 and ropes 49 in a manner similar to what has been illustrated and described with reference to the variant embodiment shown in Fig. 11 .
  • FIG. 13 there is schematically shown an equipment 51 controlling the lifting of structure 11 according to the invention.
  • said equipment 51 has been conceived for a self-lifting structure 11 of the kind described above, equipped with four vertical columns 13, and a corresponding lifting mechanism 17 equipped with four hydraulic lifting devices 45.
  • Equipment 51 essentially comprises a pump 53, e.g. a gear pump driven by an electric motor 55, connected to the equipment through a valve 57, preferably an electrically-controlled valve, through which pump 53 feeds a flow divider 59, for instance a gear flow divider, ensuring the output synchronism of the four supply ducts 61 of hydraulic devices 45.
  • a pump 53 e.g. a gear pump driven by an electric motor 55
  • a valve 57 preferably an electrically-controlled valve, through which pump 53 feeds a flow divider 59, for instance a gear flow divider, ensuring the output synchronism of the four supply ducts 61 of hydraulic devices 45.
  • Said supply ducts 61 are equipped with corresponding restraining valves 63 in order to prevent a spontaneous displacement of hydraulic devices 45 caused by the load supported on frame 15.
  • Equipment 51 further has an oil reservoir 65 and a control unit 67.
  • structure 11 preferably comprises as many lifting devices 45 as columns 13 are, and said devices 45 can be simultaneously operated in order to allow lifting or lowering frame 15 while keeping it horizontal with respect to the support plane of the structure, i.e. perpendicular to columns 13.
  • equipment 51 is mounted on board a movable unit, for instance a buggy, and devices 45 will be advantageously equipped with fast hydraulic joints.
  • the same equipment 51 may advantageously be used to control different self-lifting structures according to the invention, which are for instance installed in building yards even at a distance from one another, with considerable savings in the management costs.
  • hydraulic devices 45 could also be associated with a hydraulic circuit mounted on a vehicle, for instance a tractor, or provided on the same crane supported by the structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Jib Cranes (AREA)
EP11176645A 2010-08-05 2011-08-05 Plateforme auto-élévatrice pour la construction. Withdrawn EP2415704A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2010A000680A IT1401371B1 (it) 2010-08-05 2010-08-05 Struttura di supporto autosollevante per edilizia.

Publications (1)

Publication Number Publication Date
EP2415704A1 true EP2415704A1 (fr) 2012-02-08

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ID=43629659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11176645A Withdrawn EP2415704A1 (fr) 2010-08-05 2011-08-05 Plateforme auto-élévatrice pour la construction.

Country Status (2)

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EP (1) EP2415704A1 (fr)
IT (1) IT1401371B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012100413U1 (de) 2012-02-08 2013-01-31 August Alborn Gmbh & Co. Kg Vorrichtung zum taktweisen Heben schwerer Lasten
CN104944300A (zh) * 2015-06-26 2015-09-30 浙江省建设机械集团有限公司 一种臂架起重机基础
US20210323797A1 (en) * 2018-06-15 2021-10-21 Liebherr-Werk Biberach Gmbh Rotary tower crane having a tower mast that consists of a plurality of tower sections
CN114319694A (zh) * 2021-11-25 2022-04-12 滁州金诚金属制品有限公司 一种标准接头公接头

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968874C (de) * 1949-01-04 1958-04-03 Carl Metz Feuerwehrgeraetefabr Fahrbares Baugeruest
DE1684294A1 (de) * 1966-07-20 1971-04-01 Max Johanning Geruestbock
FR2532927A1 (fr) * 1982-09-11 1984-03-16 Access Eng Ltd Plate-forme de travail deplacable verticalement
JPS61206594U (fr) * 1985-06-17 1986-12-26
JPH06146578A (ja) * 1992-10-30 1994-05-27 Takenaka Komuten Co Ltd 筒状構造体のクライミングステージ工法と煙突の施工法
US5579865A (en) 1994-02-23 1996-12-03 Butler; J. Frank Scaffold
JPH0978844A (ja) * 1995-09-11 1997-03-25 Ishikawajima Transport Mach Co Ltd 屋根架構のクライミング制御方法およびその制御方法に用いられるクライミング制御装置
EP0771916A1 (fr) * 1995-05-15 1997-05-07 Obayashi Corporation Ossature provisoire utilisee dans la construction d'un batiment
US6749041B1 (en) 2002-12-23 2004-06-15 Larry S. Hutchings Joist scaffold unit
DE202004011443U1 (de) 2004-07-21 2004-10-07 Anton Ruthmann Gmbh & Co. Kg Abstützvorrichtung für Traggestelle mit vorkragenden Lasten
US20050183905A1 (en) 2000-09-11 2005-08-25 Hydro Mobile Self-raising platform assembly
DE202006013743U1 (de) 2006-09-05 2006-11-09 Winden- Und Maschinenbau Gressbach Gmbh Kraneinheit

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968874C (de) * 1949-01-04 1958-04-03 Carl Metz Feuerwehrgeraetefabr Fahrbares Baugeruest
DE1684294A1 (de) * 1966-07-20 1971-04-01 Max Johanning Geruestbock
FR2532927A1 (fr) * 1982-09-11 1984-03-16 Access Eng Ltd Plate-forme de travail deplacable verticalement
JPS61206594U (fr) * 1985-06-17 1986-12-26
JPH06146578A (ja) * 1992-10-30 1994-05-27 Takenaka Komuten Co Ltd 筒状構造体のクライミングステージ工法と煙突の施工法
US5579865A (en) 1994-02-23 1996-12-03 Butler; J. Frank Scaffold
EP0771916A1 (fr) * 1995-05-15 1997-05-07 Obayashi Corporation Ossature provisoire utilisee dans la construction d'un batiment
JPH0978844A (ja) * 1995-09-11 1997-03-25 Ishikawajima Transport Mach Co Ltd 屋根架構のクライミング制御方法およびその制御方法に用いられるクライミング制御装置
US20050183905A1 (en) 2000-09-11 2005-08-25 Hydro Mobile Self-raising platform assembly
US6749041B1 (en) 2002-12-23 2004-06-15 Larry S. Hutchings Joist scaffold unit
DE202004011443U1 (de) 2004-07-21 2004-10-07 Anton Ruthmann Gmbh & Co. Kg Abstützvorrichtung für Traggestelle mit vorkragenden Lasten
DE202006013743U1 (de) 2006-09-05 2006-11-09 Winden- Und Maschinenbau Gressbach Gmbh Kraneinheit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012100413U1 (de) 2012-02-08 2013-01-31 August Alborn Gmbh & Co. Kg Vorrichtung zum taktweisen Heben schwerer Lasten
CN104944300A (zh) * 2015-06-26 2015-09-30 浙江省建设机械集团有限公司 一种臂架起重机基础
CN104944300B (zh) * 2015-06-26 2017-01-25 浙江省建设机械集团有限公司 一种臂架起重机基础
US20210323797A1 (en) * 2018-06-15 2021-10-21 Liebherr-Werk Biberach Gmbh Rotary tower crane having a tower mast that consists of a plurality of tower sections
CN114319694A (zh) * 2021-11-25 2022-04-12 滁州金诚金属制品有限公司 一种标准接头公接头
CN114319694B (zh) * 2021-11-25 2023-08-01 滁州金诚金属制品有限公司 一种标准接头公接头

Also Published As

Publication number Publication date
ITTO20100680A1 (it) 2012-02-06
IT1401371B1 (it) 2013-07-18

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