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EP2915768A1 - Portalkran - Google Patents

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Publication number
EP2915768A1
EP2915768A1 EP15000615.3A EP15000615A EP2915768A1 EP 2915768 A1 EP2915768 A1 EP 2915768A1 EP 15000615 A EP15000615 A EP 15000615A EP 2915768 A1 EP2915768 A1 EP 2915768A1
Authority
EP
European Patent Office
Prior art keywords
girder
carriage
gantry crane
fact
girders
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Withdrawn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
EP15000615.3A
Other languages
English (en)
French (fr)
Inventor
Stefano Bonamin
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.)
Step Technology Srl
Original Assignee
Step Technology 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 Step Technology Srl filed Critical Step Technology Srl
Publication of EP2915768A1 publication Critical patent/EP2915768A1/de
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C19/00Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
    • B66C19/005Straddle carriers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C19/00Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
    • B66C19/02Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries collapsible

Definitions

  • the field of the invention involves the wheeled gantry bridge crane sector.
  • the structure practically imitates the layout of the gantry structures that slide on tracks, with the difference being that the legs have wheels that swivel around its axis and steering.
  • a pair of parallel girders joining the legs is applied the carriage with a hoisting hook.
  • Said carriage can run along the entire runway beam.
  • the boxed runway girder is telescopic, allowing the carriage to be able to change the wheelbase of the structure.
  • the hook carriage continues to slide on the outside of the boxed runway girder but it cannot, given the different size of the cross-section, slide on the telescopic extension of the joining girder. Sometimes this necessitates lifting the loads where the cord of the hoisting hook is not vertical, but inclined.
  • the main object of this invention is to make available a gantry bridge crane that can overcome all the drawbacks of the prior art.
  • An important object of this invention is to make available a wheeled gantry bridge crane that can easily vary the wheelbase/track for moving the load.
  • a further object of this invention is to make available a wheeled gantry bridge crane that can exploit the entire extension of the wheelbase/track.
  • Another object of this invention is to make available a wheeled gantry bridge crane that can easily lift loads even in an inclined direction.
  • a gantry bridge crane that includes an extendable frame equipped with a first girder connected in a moveable manner to a second girder to vary, based on the degree of connection, the track of said crane, and at least one mobile carriage with a lifting hook, where said mobile carriage slides on a main carriage fitted with at a first end with a first joint with the first girder, and a second end with a second joint with the second girder.
  • said main carriage has a length of about half the first girder, allowing the hook to be positioned for lifting, following the shifting and/or on the main carriage on the girders of the frame and/or the smaller carriage on the main carriage for the entire extension of the track of the gantry crane.
  • At least said first girder or at least said second girder is of the box girder variety.
  • said first girder or at least said second girder has a circular cross-section.
  • Another advantage is that the mobile coupling between said first girder and said second girder is telescopic in nature, making the system simple, safe and reliable and requiring little maintenance. Another advantage comes from the adoption of a coupling between said first and said second girder is coaxial in nature, thereby facilitating the extension in alignment.
  • the cross-section of the first and second girder is circular, making it easy to install and in combination with special supports of the carriage also allowing the carriage itself to rotate around the vertical for lifting loads with the cord of the hook inclined, without this resting or scraping against the structure of the girder or getting worn because of the erroneous inclination angle.
  • the resistant section and the moment of inertia of the circular girders are identical for any orthogonal stress on the main axis of the girders themselves.
  • the support points of the main carriage on the circular-section girders are rollers with integrated concavities in the middle with a semi-circular generatrix that allow the main carriage to move along the axis of the circular-section girders and to vary the rotation of the main carriage by modifying the inclination of the pull angle of the load hook cable.
  • rollers have a concave shape complementary to the cross-section of the girders.
  • the travel of the carriage on the girder of the frame and of the smaller carriage on the main carriage is practically equal to the minimum to the maximum travel of the telescoped part of the circular-section or boxed girder on the circular girder or boxed girder of the frame.
  • gantry bridge cranes are structured with a quadrangular frame supported at the top by four legs.
  • the hoisting mechanism composed of a hook held by a cord, which is lifted and collected around a drum that is made to turn, by means of a gear unit and a motor, which can be either electric or hydraulic.
  • Said frame of the prior art is fixed and does not have a variable track.
  • some bridge gantry cranes have a frame that has a slightly variable track.
  • bridge gantry crane 1 which is the object of the invention, shown in the drawings, is structured as a frame 2 supported at the top by four legs.
  • a first pair of girders 14, parallel and opposite the above-mentioned frame 2, has a fixed length.
  • a second pair of girders 4 opposite the above-mentioned frame 2, and orthogonal to the first pair of girders 14, has the possibility of varying the track.
  • the variation of the track for each single girder 4 connecting a pair of legs 3 is made by a first 5 and a second girder 6 that are coaxial and telescoped between themselves.
  • This circular section also facilitates the installation, but above all it allows the smaller carriage 8 with the cord 16 that is inclined with respect to the vertical to be used to lift loads that are not under the vertical of the girders themselves.
  • the length of the first outer girder 5 with respect to the second inner girder 6 is roughly equal.
  • said main carriage 7 can position itself according to the modes set out above, bringing itself from one end to the other of the span formed by the girders 4, both when they are in a compact state and also when they are in an extended position, this is how the track of the gantry crane 1 is always ready to be used in its entirety.
  • the smaller mobile carriage 8 is free to move along the guides13 of the main carriage 7 to move the load hook 11 using the relative cord 16.
  • This useful characteristic in combination with the support rollers 12, 15 of the carriage 7 configured in a complementary manner, with a concave semi-circular section, allows the carriage 7 to move along the main axis of the girders 4, bringing the hook 11 into the desired position.
  • the carriage 7 can rotate around the main axis of the girder 4 of the frame 2, making it possible to load with the inclined cords 16 without causing any damage due to dragging or the like.
  • the carriage 7 starts to rotate and change its rotation following the raising of the load, however keeping the cords 16 always subject to a pulling action, without other components.
  • the connecting girder 4 which has a moment of inertia that is identical for any axis that is orthogonal to the main one, keeps the identical capacity under any load condition, both in the vertical and with the load inclined.
  • connection girder 4 of the legs 3 composed of a first girder 5 and a second girder 6, telescoped between themselves, and preferably with the second girder 6 arranged internally and coaxially to the first girder 5.
  • the extension of this connection girder 4 can, therefore, reach a length of approximately double that of the two parts of the girder (first girder 5 plus the second girder 6), reaching a track that is double that of the length of the individual parts.
  • the main carriage 7 in this case will have a first support with its support roller 12 at one of its ends 9 on the outer girder 5 and a second support at its opposite end 10 on the inner girder 6.
  • said carriage 7 has another track, fitted with guides 13, on which a smaller carriage 8 moves that supports the loading hook 11.
  • the carriage 7 with an extension roughly the same as one of the girders 5, 6 can move freely when the telescoped girder 4 is extended to its maximum length, where the two points of support 9, 10 on rollers 12 and 15 are able to slide freely on different sections of the respective girders 5, 6, since said sliding rollers 12, 15 have a suitable section, and providing the smaller carriage 8 with a track with guides 13 roughly the same as its own length.
  • the smaller carriage 8 can reach any point of the span of the bridge crane 1, both in a reduced configuration and in an expanded configuration, exploiting both the length of the track of the carriage 7, on whose guides 13 it can move between the two support ends 9, 10, and maintaining the same supports 9, 10 on the sections with a different diameter between the main outer girder 5 and the coaxial telescopic girder 6 inside the main girder 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Leg Units, Guards, And Driving Tracks Of Cranes (AREA)
EP15000615.3A 2014-03-04 2015-03-03 Portalkran Withdrawn EP2915768A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPD20140050 2014-03-04

Publications (1)

Publication Number Publication Date
EP2915768A1 true EP2915768A1 (de) 2015-09-09

Family

ID=50693851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000615.3A Withdrawn EP2915768A1 (de) 2014-03-04 2015-03-03 Portalkran

Country Status (1)

Country Link
EP (1) EP2915768A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106114907A (zh) * 2016-08-19 2016-11-16 北京精密机电控制设备研究所 一种火箭舱段紧凑空间内伺服机构安装装置及安装方法
CN106429830A (zh) * 2016-10-31 2017-02-22 北京环境特性研究所 一种龙门吊全方位转向装置及方法
CN107381367A (zh) * 2017-08-24 2017-11-24 安徽骏达起重机械有限公司 移动式轻型组合式悬挂起重机
CN110980539A (zh) * 2019-12-24 2020-04-10 金鹏装配式建筑有限公司 一种混凝土构件起吊机
IT201800021166A1 (it) * 2018-12-27 2020-06-27 Cesare Bonfiglioli Apparato per la movimentazione di container

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1427076A (fr) * 1964-12-08 1966-02-04 France Neige Portique de manutention
GB1212425A (en) * 1967-05-12 1970-11-18 Gordon Reginald Himsworth Mobile gantry frames
FR2420502A1 (fr) * 1978-03-23 1979-10-19 Alsthom Cgee Organe support d'une poutre pour un portique mobile
WO2003068650A2 (en) * 2002-02-14 2003-08-21 Steven Morreim Mobile lift
EP2479132A2 (de) * 2010-11-29 2012-07-25 Herbert Theuerer Ladekran und Fahrzeug mit Ladekran

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1427076A (fr) * 1964-12-08 1966-02-04 France Neige Portique de manutention
GB1212425A (en) * 1967-05-12 1970-11-18 Gordon Reginald Himsworth Mobile gantry frames
FR2420502A1 (fr) * 1978-03-23 1979-10-19 Alsthom Cgee Organe support d'une poutre pour un portique mobile
WO2003068650A2 (en) * 2002-02-14 2003-08-21 Steven Morreim Mobile lift
EP2479132A2 (de) * 2010-11-29 2012-07-25 Herbert Theuerer Ladekran und Fahrzeug mit Ladekran

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106114907A (zh) * 2016-08-19 2016-11-16 北京精密机电控制设备研究所 一种火箭舱段紧凑空间内伺服机构安装装置及安装方法
CN106429830A (zh) * 2016-10-31 2017-02-22 北京环境特性研究所 一种龙门吊全方位转向装置及方法
CN107381367A (zh) * 2017-08-24 2017-11-24 安徽骏达起重机械有限公司 移动式轻型组合式悬挂起重机
IT201800021166A1 (it) * 2018-12-27 2020-06-27 Cesare Bonfiglioli Apparato per la movimentazione di container
WO2020136472A1 (en) * 2018-12-27 2020-07-02 Cesare Bonfiglioli Apparatus for moving containers
CN110980539A (zh) * 2019-12-24 2020-04-10 金鹏装配式建筑有限公司 一种混凝土构件起吊机

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