US3642148A - Device for achieving permanent equilibration in tower cranes - Google Patents

Device for achieving permanent equilibration in tower cranes Download PDF

Info

Publication number
US3642148A
US3642148A US39241A US3642148DA US3642148A US 3642148 A US3642148 A US 3642148A US 39241 A US39241 A US 39241A US 3642148D A US3642148D A US 3642148DA US 3642148 A US3642148 A US 3642148A
Authority
US
United States
Prior art keywords
load
jib
carriage
sheaves
cable
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.)
Expired - Lifetime
Application number
US39241A
Other languages
English (en)
Inventor
Pierre Durand
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.)
Richier SA
Original Assignee
Richier SA
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 Richier SA filed Critical Richier SA
Application granted granted Critical
Publication of US3642148A publication Critical patent/US3642148A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/14—Trolley or crane travel drives
    • 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
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0385—Cranes with trolleys movable along adjustable or slewable arms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm

Definitions

  • ABSTRACT A device for obtaining permanent equilibration in tower cranes of the type including a load jib, over which a carriage fitted with a lifting hook travels, and a jib over which a carriage carrying a counterweight is adapted to be shifted, said device including in combination: means for measuring the moment resulting from the weight of the load, on the one hand, and from the position of the load carriage on the jib, on the other hand, means for shifting the counterweight carrier on the corresponding jib, and means for increasing the duration of the loading operation in order to enable the counterweight carrier to move only slowly and progressively as the load moment varies, without any disorderly motions.
  • the present invention relates to a device for obtaining permanent equilibration in tower cranes.
  • the present invention relates to a device enabling a permanent balance to be obtained, whatever the load hanging from the hook of the carriage and the position of said carriage on the jib may be, this result being achieved by causing the counterweight carrier to move over the corresponding jib.
  • Said device for balancing a tower crane permanently includes in combination: means for shifting the counterweight carrier along the corresponding jib, means for measuring the moment resulting from the weight of the load, on the one hand, and from the position of the load carriage on the jib, on the other hand, and means for increasing the duration of the loading operation in order to enable the counterweight carrier to move only slowly and progressively as the load moment varies, without any disorderly motions.
  • the means for measuring the load moment are disposed on the tie connecting the load jib to the top of the tower, and in the most common cases they consist of extensometers or some other stress-measuring devices.
  • the means for shifting the counterweight carrier consist of a speed-reducing motor unit.
  • the increase in the duration of the loading operation is obtained by increasing the length of the fixed end of the hoist cable by means of various windings, on the one hand, and by using an arrangement temporarily slackening the tension of said cable, on the other hand.
  • This increase in the duration of the loading operation is very important, because it gives the counterweight the time to move to achieve the equilibration before the load is actually lifted or laid down.
  • the arrangement for slackening the tension of the cable temporarily is hydraulic, and comprises a multistrand block interposed between the fixed point of the hoist cable and the lifting hook, wherein a first set of sheaves is fast, while a second set of sheaves is mounted on a movable support connected to the fast support of the first set by a single-action hydraulic jack, the working chamber of said jack being connected to at least one oleopneumatic accumulator adjusted to a given pressure, in order that, at the time of the loading operation, the tension of the cable causes first the shifting of the movable support of the second set of sheaves towards the first set of sheaves, and then, only when said support has reached a position wherein the pressure generated in the accumulators produces at the level of the cables the tension required for lifting the load, the elevation of said load.
  • FIG. 1 is a side elevational view of said tower crane
  • FIG. 2 is a side elevational view, on an enlarged scale, of the load-carrying jib, and shows the various sheaves returning the hoist cable,
  • FIG. 3 is a diagram illustrating the path of the hoist cable
  • FIGS. 4 and 5 are a side elevational view and a top plan view, respectively, of the device for slackening the tension of the cable, as shown on an enlarged scale.
  • the tower crane illustrated in FIG. 1 consists, in a known manner, of a tower 2, at the upper part of which a tower head 3 is mounted, which head is integral with the load jib 4 and the counterweight jib 5.
  • a carriage 6, which carries the lifting hook 7, is adapted to travel on the load jib 4.
  • the counterweight jib 5 is likewise provided with a carriage 8, which carries a counterweight 9, which carriage is adapted to be shifted between two positions A and B through the agency of a winch 10 and a cable 12.
  • said crane is provided with a device ensuring the permanent equilibration thereof, whatever the load carried by the crane and the position of the carriage 6 on the jib 4, and, therefore, the moment of said load with respect to the vertical longitudinal axis of the crane, may be.
  • Said device is essentially constituted by three means:
  • the hoist cable 15 follows an especially long path, as shown in FIGS. 2 and 3.
  • said cable starts from a winch l7 and passes over a sliding sheave 18, over two sheaves 19 disposed at the top of the tower head 3, and over a sheave 20 disposed at the fixed end of the jib 4, and then over the sheaves 22 of a block integral with the lifting hook 7.
  • the cable 15 passes over a sheave 23 disposed at the free end of the jib 4, and then, after passing over guiding sheaves 24, reaches the slackening device 16 disposed downstream of the anchorage point for said cable.
  • Said slackening device 16 comprises an eight-strand block having its first set of sheaves 26 keyed to a fast support 27, and its second set of sheaves 28 mounted on a carriage 29 adapted to travel lengthwise over rails 30 integral with a frame 32.
  • Said carriage 29 is connected to the fast support 27 by a single action hydraulic jack 33 provided with a compensation tank.
  • the chamber of said jack is connected to two oleopneumatic accumulators 34 located on the frame 32, while a flow regulator (not shown) is interposed therebetween.
  • the increase in the duration of the loading operation is of great importance, because it allows not only to shift the counterweight 9, but also to carry out said shifting operation slowly and progressively, so that there are no risks of disorderly movements like those which would occur, due to the inherent elasticity of the various component parts of the crane, in the event of the load being lifted quickly and immediately.
  • the counterweight 9 is in its optimum position, and remains therein as long as the load is not laid down.
  • the increase in the duration of the loading operation may be obtained by increasing the flexibility of the crane.
  • the invention is not limited to the sole embodiment of said device just described hereinabove, but covers all modifications thereof within the scope of the appended claims, as well as applications to cranes of other types, such as tower cranes with hinged jibs, tower cranes with hinged jibs and crabs, tower cranes with retractable jibs, and tower cranes with telescopic jibs.
  • a device for obtaining permanent equilibration in tower cranes of the type including a load jib, a carriage fitted with a load-lifting hook, a winding hoist cable connected at its free end to said carriage for imparting movement to the latter over said jib, a second jib, a carriage supporting a counterweight adapted to be shifted over said second jib, comprising the combination of means for measuring the moment resulting from the weight of the load on the one hand, and from the position of the load carriage on the load jib on the other hand, means for shifting the counterweight-supporting carriage on said second jib, and means for increasing the duration of the loading operation to enable said last-mentioned carriage to move slowly and progressively only in response to variations in the load moment while eliminating sudden motions thereof, the increase in the duration of the loading operation being in response to an increase in the length of hoist cable unwound from its winding end, and a device for temporarily slackening the tension in said hoist cable

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US39241A 1969-05-29 1970-05-21 Device for achieving permanent equilibration in tower cranes Expired - Lifetime US3642148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6916026A FR2041657A5 (enrdf_load_stackoverflow) 1969-05-29 1969-05-29

Publications (1)

Publication Number Publication Date
US3642148A true US3642148A (en) 1972-02-15

Family

ID=9034200

Family Applications (1)

Application Number Title Priority Date Filing Date
US39241A Expired - Lifetime US3642148A (en) 1969-05-29 1970-05-21 Device for achieving permanent equilibration in tower cranes

Country Status (5)

Country Link
US (1) US3642148A (enrdf_load_stackoverflow)
JP (1) JPS513986B1 (enrdf_load_stackoverflow)
DE (1) DE7018790U (enrdf_load_stackoverflow)
FR (1) FR2041657A5 (enrdf_load_stackoverflow)
GB (1) GB1311767A (enrdf_load_stackoverflow)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985627A (en) * 1973-04-12 1976-10-12 Klockner-Humboldt-Deutz Aktiengesellschaft Device for magnetic lifting and removal of the feed opening cover of a coking chamber oven
US4067446A (en) * 1976-02-24 1978-01-10 Ray Louis F Cable stay crane
US4113112A (en) * 1976-08-13 1978-09-12 Ray Louis F Constant balance crane
US4303164A (en) * 1974-09-02 1981-12-01 Linden-Alimak Ab Structure for damping the oscillation of building cranes
US4480757A (en) * 1982-01-28 1984-11-06 Amca International Corporation Collapsible frame support for pivotal boom on a portable crane
US4516117A (en) * 1982-04-05 1985-05-07 Raymond Couture Range controller for continuously monitoring the position of the boom of heavy machinery
US4763800A (en) * 1986-03-19 1988-08-16 Edgar D. Engler Mobile lifting apparatus
US4807767A (en) * 1983-12-20 1989-02-28 Grumman Aerospace Corporation Self balancing electric hoist
ES2247947A1 (es) * 2005-05-11 2006-03-01 Jose Maria Martinez - Val Peñalosa Grua de contrapeso movil.
EP2360113A1 (en) * 2010-02-11 2011-08-24 Vinicius De Carvalho Cal Crane and counterweight control process of a crane
CN103350962A (zh) * 2013-07-17 2013-10-16 中联重科股份有限公司 塔机及塔机的平衡力矩的调整方法
WO2015042945A1 (zh) * 2013-09-29 2015-04-02 国家电网公司 一种安装有可移动式平衡重系统的组塔塔式起重机
USD742979S1 (en) * 2014-03-21 2015-11-10 Theunis Johannes Post Mobile multi-functional fitness frame
CN105236270A (zh) * 2015-10-30 2016-01-13 湖南中联重科智能技术有限公司 塔式起重机的重心检测方法、装置、系统及塔式起重机
CN105271024A (zh) * 2015-11-25 2016-01-27 镇海建设集团有限公司 具有防风结构的塔吊
CN105293316A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 一种防风塔吊
CN105293302A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 具有防风功能的塔吊
CN105293310A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 一种具有防风结构的塔吊
CN105293299A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 建筑用防风塔式起重机
CN105293312A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 一种塔式起重机
CN107826987A (zh) * 2017-09-30 2018-03-23 中国化学工程第六建设有限公司 液压顶升平桥
US20230026998A1 (en) * 2019-12-27 2023-01-26 S&L Access Systems Ab A crane comprising a movable boom and a movable counterweight
CN115744634A (zh) * 2022-09-15 2023-03-07 中联重科股份有限公司 塔式起重机及其控制方法、装置、处理器及云管理平台
CN116986497A (zh) * 2023-08-31 2023-11-03 徐州建机工程机械有限公司 一种倾泻式平衡重装置及脱落方法

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168130A (en) 1977-04-22 1979-09-18 Dr. Barth Kg Apparatus for placing paving elements
DE2833809C2 (de) * 1978-08-02 1983-11-24 Louis F. Baton Rouge La. Ray Kran mit beweglichem Gegengewicht
FR2467169A1 (fr) * 1979-10-11 1981-04-17 Tranchand Marc Grue a tour
DE3307893C2 (de) * 1983-03-05 1985-01-24 Pekazett Baumaschinen GmbH, 6660 Zweibrücken Turmdrehkran mit Ausleger und Gegenausleger
FR2641773B1 (fr) * 1989-01-18 1991-03-15 Potain Sa Grue a fleche relevable avec dispositif de renvoi de fleche
DE19653579B4 (de) † 1996-12-20 2017-03-09 Liebherr-Werk Biberach Gmbh Turmdrehkran
GB2433734A (en) * 2005-12-30 2007-07-04 David Schofield Adjustable counterbalance system
US7967158B2 (en) 2006-10-27 2011-06-28 Manitowoc Crane Companies, Llc Mobile lift crane with variable position counterweight
US9278834B2 (en) 2009-08-06 2016-03-08 Manitowoc Crane Group, LLC Lift crane with moveable counterweight
CN102701088A (zh) * 2012-06-21 2012-10-03 左芳清 自动平衡塔式起重机
EP3099622B1 (en) 2014-01-27 2019-07-17 Manitowoc Crane Companies LLC Lift crane with improved movable counterweight
EP3099620A4 (en) 2014-01-27 2017-10-11 Manitowoc Crane Companies, Inc. Height adjustment mechanism for an auxiliary member on a crane
CN106892365A (zh) * 2017-04-20 2017-06-27 沈阳建筑大学 一种双臂并行平头塔式起重机
DE202017107301U1 (de) * 2017-09-01 2018-12-07 Liebherr-Werk Biberach Gmbh Turmdrehkran
CN111960297B (zh) * 2020-08-21 2024-06-18 抚顺永茂建筑机械有限公司 一种塔式起重机的可升降桅杆装置
CN119290367B (zh) * 2024-12-16 2025-03-21 四川电力设计咨询有限责任公司 输电线路组塔用双摇臂抱杆现场荷载试验加载方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US446043A (en) * 1891-02-10 Counterbalanced jib-crane
US2413701A (en) * 1941-09-24 1947-01-07 Faure Andre Crane
FR1135807A (fr) * 1955-08-08 1957-05-03 Perfectionnement aux appareils de levage
FR1212461A (fr) * 1958-10-17 1960-03-24 Potain & Cie Ets F Perfectionnements aux grues
US3240353A (en) * 1963-03-08 1966-03-15 Leavesley Engineering Ltd Load responsive counterbalancing crane
US3381826A (en) * 1965-12-30 1968-05-07 Richier Sa Translating means for the counterbalancing carriages in tower cranes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US446043A (en) * 1891-02-10 Counterbalanced jib-crane
US2413701A (en) * 1941-09-24 1947-01-07 Faure Andre Crane
FR1135807A (fr) * 1955-08-08 1957-05-03 Perfectionnement aux appareils de levage
FR1212461A (fr) * 1958-10-17 1960-03-24 Potain & Cie Ets F Perfectionnements aux grues
US3240353A (en) * 1963-03-08 1966-03-15 Leavesley Engineering Ltd Load responsive counterbalancing crane
US3381826A (en) * 1965-12-30 1968-05-07 Richier Sa Translating means for the counterbalancing carriages in tower cranes

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985627A (en) * 1973-04-12 1976-10-12 Klockner-Humboldt-Deutz Aktiengesellschaft Device for magnetic lifting and removal of the feed opening cover of a coking chamber oven
US4303164A (en) * 1974-09-02 1981-12-01 Linden-Alimak Ab Structure for damping the oscillation of building cranes
US4067446A (en) * 1976-02-24 1978-01-10 Ray Louis F Cable stay crane
US4113112A (en) * 1976-08-13 1978-09-12 Ray Louis F Constant balance crane
US4480757A (en) * 1982-01-28 1984-11-06 Amca International Corporation Collapsible frame support for pivotal boom on a portable crane
US4516117A (en) * 1982-04-05 1985-05-07 Raymond Couture Range controller for continuously monitoring the position of the boom of heavy machinery
US4807767A (en) * 1983-12-20 1989-02-28 Grumman Aerospace Corporation Self balancing electric hoist
US4763800A (en) * 1986-03-19 1988-08-16 Edgar D. Engler Mobile lifting apparatus
ES2247947A1 (es) * 2005-05-11 2006-03-01 Jose Maria Martinez - Val Peñalosa Grua de contrapeso movil.
ES2247947B1 (es) * 2005-05-11 2007-05-16 Jose Maria Martinez - Val Peñalosa Grua de contrapeso movil.
EP2360113A1 (en) * 2010-02-11 2011-08-24 Vinicius De Carvalho Cal Crane and counterweight control process of a crane
US20110278252A1 (en) * 2010-02-11 2011-11-17 Vinicius De Carvalho Cal Crane and counterweight control process of a crane in real time
CN103350962A (zh) * 2013-07-17 2013-10-16 中联重科股份有限公司 塔机及塔机的平衡力矩的调整方法
CN103350962B (zh) * 2013-07-17 2016-03-16 中联重科股份有限公司 塔机及塔机的平衡力矩的调整方法
WO2015042945A1 (zh) * 2013-09-29 2015-04-02 国家电网公司 一种安装有可移动式平衡重系统的组塔塔式起重机
USD742979S1 (en) * 2014-03-21 2015-11-10 Theunis Johannes Post Mobile multi-functional fitness frame
CN105236270A (zh) * 2015-10-30 2016-01-13 湖南中联重科智能技术有限公司 塔式起重机的重心检测方法、装置、系统及塔式起重机
CN105271024A (zh) * 2015-11-25 2016-01-27 镇海建设集团有限公司 具有防风结构的塔吊
CN105293302B (zh) * 2015-11-25 2017-08-18 镇海建设集团有限公司 具有防风功能的塔吊
CN105293310A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 一种具有防风结构的塔吊
CN105293299A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 建筑用防风塔式起重机
CN105293312A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 一种塔式起重机
CN105293316A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 一种防风塔吊
CN105293299B (zh) * 2015-11-25 2017-08-18 镇海建设集团有限公司 建筑用防风塔式起重机
CN105293302A (zh) * 2015-11-25 2016-02-03 镇海建设集团有限公司 具有防风功能的塔吊
CN105293312B (zh) * 2015-11-25 2017-09-22 镇海建设集团有限公司 一种塔式起重机
CN107826987A (zh) * 2017-09-30 2018-03-23 中国化学工程第六建设有限公司 液压顶升平桥
US20230026998A1 (en) * 2019-12-27 2023-01-26 S&L Access Systems Ab A crane comprising a movable boom and a movable counterweight
US12049390B2 (en) * 2019-12-27 2024-07-30 Skyrex Ab Crane comprising a movable boom and a movable counterweight
CN115744634A (zh) * 2022-09-15 2023-03-07 中联重科股份有限公司 塔式起重机及其控制方法、装置、处理器及云管理平台
CN115744634B (zh) * 2022-09-15 2024-01-16 中联重科股份有限公司 塔式起重机及其控制方法、装置、处理器及云管理平台
CN116986497A (zh) * 2023-08-31 2023-11-03 徐州建机工程机械有限公司 一种倾泻式平衡重装置及脱落方法

Also Published As

Publication number Publication date
GB1311767A (en) 1973-03-28
JPS513986B1 (enrdf_load_stackoverflow) 1976-02-07
FR2041657A5 (enrdf_load_stackoverflow) 1971-01-29
DE7018790U (de) 1970-12-10

Similar Documents

Publication Publication Date Title
US3642148A (en) Device for achieving permanent equilibration in tower cranes
RU2492134C1 (ru) Мостовой кран
GB1194618A (en) Construction Elevator System
US2805781A (en) Load stabilized crane
CN111776959B (zh) 一种具有减摇功能的船用起重机
CN205151582U (zh) 新型齿条变幅单臂架多用途固定起重机
US3874516A (en) Device for preventing the swaying of the suspending means in a crane
US4976361A (en) Mobile crane comprising a telescopic boom
US4126298A (en) Compensation device for a crane
CN103964316A (zh) 多功能多用途门座式起重机
CN206645749U (zh) 电动葫芦式多层缠绕卷扬机
CN216997387U (zh) 具有可移动配重块机构的起重机
CN212269283U (zh) 一种全回转移动式桅杆起重机
CN209322336U (zh) 一种具有同轴并列卷扬的起吊装置及起重机和工程机械
CN108792943B (zh) 一种具有同轴并列卷扬的起吊装置及起重机和工程机械
CN118183517A (zh) 一种智能起重机的减摆调节装置
JPS59133195A (ja) 巻上装置
US3530999A (en) Safety device for materials handling structures
US3191779A (en) Anti-pendulum crane rigging
US4074817A (en) Barge cable crane
US2888150A (en) Level luffing attachment for cranes
US3685669A (en) Derrick cranes and swinging derricks
JP2000302374A (ja) アンチスナッグ装置
CN217676528U (zh) 用于起重机的侧拉装置及含有该侧拉装置的起重机
US3879077A (en) Lifting apparatus