US3481490A - Telescopic jib for jib cranes - Google Patents

Telescopic jib for jib cranes Download PDF

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Publication number
US3481490A
US3481490A US649930A US3481490DA US3481490A US 3481490 A US3481490 A US 3481490A US 649930 A US649930 A US 649930A US 3481490D A US3481490D A US 3481490DA US 3481490 A US3481490 A US 3481490A
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United States
Prior art keywords
jib
rollers
pair
components
guide surfaces
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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
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US649930A
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English (en)
Inventor
Peter Eiler
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Leo Gottwald KG
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Leo Gottwald KG
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Application filed by Leo Gottwald KG filed Critical Leo Gottwald KG
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Publication of US3481490A publication Critical patent/US3481490A/en
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    • 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
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs

Definitions

  • the jib components are manufactured from rolled sections or welded box structures, which on their underside have horizontally disposed running or sliding surfaces for cooperation with skids or slide shoes carried by the other and lower component.
  • Known constructions are complicated, expensive and have inadequate guidance of the telescopic components, with static stressing which is difficult to assess.
  • the aim underlying this invention is to provide a telescopically extensible and retractable jib for a crane which overcomes the disadvantages of known jibsI and in which the ratio of useful load to dead weight is higher.
  • a crane jib of the type set out by forming at least part of the box sections with bevelled wall portions there is provided on the one hand running or guide tracks and on the other hand the supports for rollers or slide shoes which have axes extending parallel to the bevels.
  • This arrangement of the operative surfaces or guide tracks ensures that the rigidity of the entire construction is further increased.
  • lateral guidance of the inner box is achieved, such as could be obtained in known jibs only with the aid of additional rollers disposed on the verticals. Satisfactory results with improved guidancepperformance of the individual jib components have been obtained where the bevels are at an angle of about 45 to the side walls.
  • a crane jib constructed in acocrdance with the invention has a substantially lower weight than that of comparable crane jibs and in the case of slewing cranes this is synonymous with the ability to bear a greater useful load.
  • the jib can carry heavier loads, since its jib components consist of a torsionally stii structure'.
  • each box section of the jib is assembled by welding together two sheet metal parts, previously folded into U-form, thereby enabling particularly simple manufacturing meth ods to be employed. Moreover, those sheet metal parts subjected to greater stresses can -be made of thicker guage sheet than the less stressed part. Thus, the bottom portion of the box section, which is subjected to compression stressing, can be made of thicker sheet than the other portion which is under tension. Crane jibs constructed in this manner can thus be adapted in an optimum manner to varying loads.
  • FIGURE 1 is a side elevation of a telescopic jib having two telescoping portions according to the invention
  • FIGURE 2 is a transverse section on the line II-II of FIGURE l.
  • FIGURE 3 is a transverse section on the line III-III of FIGURE 1.
  • the crane jib consists of two components 1, 2, of box-shaped section, which are nested one within the other, .the upper or movable jib com-ponent 1 carrying the head sheave bracket 3 being telescopically extensible and retractable in relation to the lower and static jib component 2, the latter being mounted forizing movements about a fulcrum on the slewing base.
  • the cross-head 3 On the cross-head 3 are guide rollers or pulleys 4 for the lifting ropes 5 or the like.
  • the jib component 1 At its inner end the jib component 1 is provided with rollers 6 which engage running surfaces 7 (FIGURE 2) on the inside of jib component 2.
  • rollers 6, as can be seen from FIG- URE l, are mounted on the upper side of the inner end of the moveable component 1, since, when under load, that end is thrust against the top wall of the stationary component 2, as in a lever, Iwith the rollers 8 ⁇ acting as a fulcrum.
  • the rollers 8 are fastened on the underside of the component 2 and roll on running surfaces 9 (FIG- URE 3) provided at the corners and on the outside of the underside of the jib component 1.
  • the job components 1, 2 consist of box sections. These box sections may be assembled by uniting two folded metal sheets along weld seams 15. Each box section, at least at its edges, has longitudinally extending bevelled surfaces 7 and 9 with which surfaces engage rollers 6 and 8 respectively which are disposed on the other box section in each case.
  • the moveable jib part 1 is constructed at its bottom .bevel with external bearing sur-faces 9, and the jib part 2, which is stationary, relative to the jib portion 1, is constructed on the inside at its upper bevel with internal bearing surfaces 7.
  • the stationary jib component 2 has at its outer end an additional box section 14 which is attached thereto such as by Welding.
  • the roller surfaces 7 and 9 together with the axes of the rollers 6 and 8 are preferably inclined by about 45 in relation to the side walls, which has been shown to give good lateral guidance of the jib portions in relation to one another. It also ensures that the sheets are subjected to minimum stress during folding.
  • the weld seams v15 in the box sections preferably lie in the neutral fibre, i.e. approximately at the mid-point of the vertical wall, so that they are not unduly stressed.
  • folded sheet metal sections of different thicknesses it is possible for folded sheet metal sections of different thicknesses to be used so that the bottom sheet which is subjected to heavier compressive loads is thicker than the top sheet where the tensile loads is less.
  • transverse stiffening webs or plates 16 are disposed in the jib component 1 on both sides of the rollers 6. In order to ensure uniform loading of the rollers 6, 8, they are mounted on a rocker.
  • two jib sections are shown but clearly the invention is also applicable where more than two jib component's are telescopically displaceable in relation to one another.
  • the present invention provides guide surfaces 7, 9, arranged in pairs and respectively 0n each of the box sections 1, 2 or other jib components, these guide surfaces 7, 9 being located upwardly and downwardly in relation to the longitudinal axis of the jib, the upper pair of surfaces 7 preferably facing inwardly and the faces of the lower pair 9 facing outwardly, for cooperation with thrust rollers or skids similarly arranged in pairs and provided on the other one of each of the box sections 1, 2.
  • the axes of each pair of rollers and also their associated guide surfaces are at an angle to one another less than a straight angle and preferably such that the guide surfaces are at an angle of 45 or approximately 45 to the sides of the box sections or other components.
  • a jib crane comprising a jib having at least two telescoping components the improvements in which each of said components is provided with a pair of substantially planar guide surfaces, the surfaces being angled in relation to one another so that the surfaces of one pair face inwardly and those of the other face outwardly, said components being provided with pairs of thrust elements, one pair of elements in relation to the longitudinal axis of the jib being located on the underside and the other pair on the upperside of their respective components, said pairs of elements having faces in slidable engagement respectively with said pairs of substantially planar guide surfaces, said faces having a width smaller than that of said substantially planar guide surfaces, the elements in each pair being spaced laterally and so arranged that the slidably engaging faces thereof extend in planes disposed at an angle corresponding to the angle at which the respective guide surfaces are disposed.
  • a jib crane comprising a jib having at least two telescoping components, the improvement in which each one of said components is provided with a pair of substantially planar guide surfaces, the surfaces being at an angle to one another with respect to the longitudinal axis of the jib so that the surfaces of one pair face inwardly and those of the other pair face outwardly, each of said components being provided with pairs of thrust rollers, one pair of rollers being located on the underside of one component and the other pair on the upperside of the other component for cooperation respectively with said pairs of guide surfaces, said thrust rollers having peripheral surfaces of a width smaller than that of said substantially planar guide surfaces, and the rollers in each pair being spaced laterally and being journalled to revolve about axes in a transverse plane, said axes at their point of intersection subtending an angle corresponding to the angle subtended by the guide surfaces.
  • a jib crane as claimed in claim 3 comprising a jib having telescoping components formed of box section members wherein the guide surfaces on the one member extend in planes which are at an angle of substantially 45 to the side walls thereof.
  • each box section member is fabricated from strip metal of U- section assembled end to end and united by weld seams.
  • An extending jib for a crane comprising two telescopically arranged box-section members, angled substantially planar guide surfaces on one of said members and longitudinally spaced pairs of thrust members having faces for sliding engagement with said guide surfaces, said faces being smaller in width than said substantially planar guide surfaces, an inboard pair of rollers being adjacent the upper sides of said members, and an outboard pair of rollers being adjacent the lower sides of said members, the axes of the rollers being inclined so that the projected axes of each pair meet respectively above and below said members, and the guide surfaces being arranged in planes which are at corresponding angles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US649930A 1966-06-30 1967-06-29 Telescopic jib for jib cranes Expired - Lifetime US3481490A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1966G0047320 DE1281651C2 (de) 1966-06-30 1966-06-30 Teleskopartig ein- und ausfahrbarer kranausleger

Publications (1)

Publication Number Publication Date
US3481490A true US3481490A (en) 1969-12-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
US649930A Expired - Lifetime US3481490A (en) 1966-06-30 1967-06-29 Telescopic jib for jib cranes

Country Status (4)

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US (1) US3481490A (de)
DD (1) DD65647A5 (de)
DE (1) DE1281651C2 (de)
GB (1) GB1122936A (de)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685673A (en) * 1970-05-28 1972-08-22 Crutcher Resources Side-loading self-propelled material transporting device
US3690742A (en) * 1971-11-19 1972-09-12 Grove Mfg Co Crane boom
US3802136A (en) * 1972-01-26 1974-04-09 Gottwald Kg Leo Extendible crane boom formed of telescopic box-shaped sections
US3807108A (en) * 1972-09-18 1974-04-30 Harnischfeger Corp Structural design of boom section with inverted {37 a{38 {11 frame cross-section
US3978957A (en) * 1973-11-13 1976-09-07 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Hollow guiding mast for a charging device of a core reactor
US4004695A (en) * 1975-04-16 1977-01-25 Fulton Industries, Inc. Channel and plate telescopic crane boom
FR2329580A1 (fr) * 1975-10-28 1977-05-27 Warner Swasey Co Fleche de grue
US4257201A (en) * 1979-04-19 1981-03-24 American Hoist & Derrick Company Self-centering telescoping beams
FR2502132A1 (fr) * 1981-03-18 1982-09-24 Ppm Sa Fleche telescopique a troncons composites
US4390315A (en) * 1978-05-18 1983-06-28 Hydra Rig Incorporated Fire fighting boom assembly for service vessel
US4534697A (en) * 1982-06-17 1985-08-13 Allibert S.A. Transfer device for robots
FR2600384A1 (fr) * 1986-06-19 1987-12-24 Lamy Perret Paul Dispositif de guidage pour un bras telescopique, notamment pour un manipulateur
EP0583552A1 (de) * 1992-08-14 1994-02-23 LIEBHERR-WERK EHINGEN GmbH Teleskopausleger für Fahrzeugkrane o. dgl.
US5465854A (en) * 1993-07-30 1995-11-14 Par Systems, Inc. Telescoping tube assembly
US5762467A (en) * 1996-04-26 1998-06-09 Par Systems, Inc. Underground storage tank manipulator
US5865328A (en) * 1993-06-16 1999-02-02 Ec Engineering + Consulting Spezialmaschinen Gmbh Telescopic boom
EP0922664A2 (de) * 1997-12-12 1999-06-16 Grove U.S. LLC Teleskopausleger mit einer Lageranordnung bestehend aus Ausprägungen
US20020045172A1 (en) * 2000-06-30 2002-04-18 Sturm Albert J. Segmented support structure and method and fixture for making the same
US6499612B1 (en) 2001-07-27 2002-12-31 Link-Belt Construction Equipment Co., L.P., Lllp Telescoping boom assembly with rounded profile sections and interchangeable wear pads
US6561368B1 (en) 2000-05-01 2003-05-13 Par Systems, Inc. Telescoping tube assembly with a cabling system
US20070098536A1 (en) * 2005-10-31 2007-05-03 Kooima Roger D Extendable telescoping boom and method of manufacturing
US20070172032A1 (en) * 1999-11-30 2007-07-26 Shook Mobile Technology, L.P. Boom with mast assembly
US20080164233A1 (en) * 2007-01-10 2008-07-10 Stellar Industries, Inc. Roller boom rest
US7624967B1 (en) 2006-04-19 2009-12-01 Par Systems, Inc. Opposed-rope hoist driven telescoping mast
US20100011731A1 (en) * 2008-07-08 2010-01-21 Bart Moutton Guides for an extendable harvesting header
US20120085723A1 (en) * 2010-10-08 2012-04-12 Liebherr-Werk Ehingen Gmbh Boom element, telescopic boom and construction vehicle
CN102887443A (zh) * 2011-07-21 2013-01-23 马尼托瓦克起重机有限责任公司 用于建设机器的拼焊板梁及其制造方法
CN103174715A (zh) * 2011-12-23 2013-06-26 苏州海伦哲专用车辆有限公司 一种伸缩臂滑块装置
US9033165B2 (en) 2011-02-09 2015-05-19 Oshkosh Corporation Crane assembly
CN111498758A (zh) * 2020-04-09 2020-08-07 中联重科股份有限公司 U型臂架组件、u型臂和高空作业设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2148966C3 (de) * 1971-09-30 1978-11-23 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Teleskopausleger, insbesondere für straßenverfahrbare Krane
US4417424A (en) * 1980-01-07 1983-11-29 Jacobson Darwin J Segmented extendible boom
DE10138443A1 (de) * 2001-08-03 2003-02-27 Mannesmann Roehren Werke Ag Verwendung eines langgestreckten warmgefertigten Hohlprofils für einen teleskopierbaren Ausleger einer Hubeinrichtung
TR201807546T4 (tr) 2001-10-16 2018-06-21 Effer S P A Yüksek dayanımlı bir teleskopik kol.
CN103241663A (zh) * 2013-05-07 2013-08-14 三一帕尔菲格特种车辆装备有限公司 一种起重机、起重机的伸缩臂及起重机的节臂

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684159A (en) * 1950-07-12 1954-07-20 Warner Swasey Co Telescoping boom actuating mechanism
US2746612A (en) * 1952-07-12 1956-05-22 Wirz Ernst Crane truck
US2817447A (en) * 1954-07-27 1957-12-24 Sicomatic A G Shunting arrangements for moving vehicles or the like
US2984373A (en) * 1958-07-16 1961-05-16 Warner Swasey Co Material handling apparatus
DE1164334B (de) * 1959-10-17 1964-02-27 Krupp Druckenmueller G M B H Spreize zum Aussteifen von Baugrubenwaenden
US3322206A (en) * 1964-10-09 1967-05-30 Ohio Brass Co Earth borer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009373B (de) * 1953-05-11 1957-05-29 Walter Alfred Golka Teleskopausleger
US3082881A (en) * 1960-04-20 1963-03-26 Wieger Ernst Telescopically variable overhang beam for dredges, cranes, and the like
DE1923569U (de) * 1964-02-22 1965-09-16 Krause Kg Robert Verstellvorrichtung fuer moebelstuecke.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684159A (en) * 1950-07-12 1954-07-20 Warner Swasey Co Telescoping boom actuating mechanism
US2746612A (en) * 1952-07-12 1956-05-22 Wirz Ernst Crane truck
US2817447A (en) * 1954-07-27 1957-12-24 Sicomatic A G Shunting arrangements for moving vehicles or the like
US2984373A (en) * 1958-07-16 1961-05-16 Warner Swasey Co Material handling apparatus
DE1164334B (de) * 1959-10-17 1964-02-27 Krupp Druckenmueller G M B H Spreize zum Aussteifen von Baugrubenwaenden
US3322206A (en) * 1964-10-09 1967-05-30 Ohio Brass Co Earth borer

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685673A (en) * 1970-05-28 1972-08-22 Crutcher Resources Side-loading self-propelled material transporting device
US3690742A (en) * 1971-11-19 1972-09-12 Grove Mfg Co Crane boom
US3802136A (en) * 1972-01-26 1974-04-09 Gottwald Kg Leo Extendible crane boom formed of telescopic box-shaped sections
US3807108A (en) * 1972-09-18 1974-04-30 Harnischfeger Corp Structural design of boom section with inverted {37 a{38 {11 frame cross-section
US3978957A (en) * 1973-11-13 1976-09-07 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Hollow guiding mast for a charging device of a core reactor
US4004695A (en) * 1975-04-16 1977-01-25 Fulton Industries, Inc. Channel and plate telescopic crane boom
FR2329580A1 (fr) * 1975-10-28 1977-05-27 Warner Swasey Co Fleche de grue
US4038794A (en) * 1975-10-28 1977-08-02 The Warner & Swasey Company Boom assembly
US4390315A (en) * 1978-05-18 1983-06-28 Hydra Rig Incorporated Fire fighting boom assembly for service vessel
US4257201A (en) * 1979-04-19 1981-03-24 American Hoist & Derrick Company Self-centering telescoping beams
FR2502132A1 (fr) * 1981-03-18 1982-09-24 Ppm Sa Fleche telescopique a troncons composites
US4534697A (en) * 1982-06-17 1985-08-13 Allibert S.A. Transfer device for robots
FR2600384A1 (fr) * 1986-06-19 1987-12-24 Lamy Perret Paul Dispositif de guidage pour un bras telescopique, notamment pour un manipulateur
EP0583552A1 (de) * 1992-08-14 1994-02-23 LIEBHERR-WERK EHINGEN GmbH Teleskopausleger für Fahrzeugkrane o. dgl.
US5865328A (en) * 1993-06-16 1999-02-02 Ec Engineering + Consulting Spezialmaschinen Gmbh Telescopic boom
US5465854A (en) * 1993-07-30 1995-11-14 Par Systems, Inc. Telescoping tube assembly
US5762467A (en) * 1996-04-26 1998-06-09 Par Systems, Inc. Underground storage tank manipulator
EP0922664A3 (de) * 1997-12-12 1999-10-20 Grove U.S. LLC Teleskopausleger mit einer Lageranordnung bestehend aus Ausprägungen
EP0922664A2 (de) * 1997-12-12 1999-06-16 Grove U.S. LLC Teleskopausleger mit einer Lageranordnung bestehend aus Ausprägungen
US6086256A (en) * 1997-12-12 2000-07-11 Grove U.S. L.L.C. Telescopic jib bearing assembly with embossments
US20070172032A1 (en) * 1999-11-30 2007-07-26 Shook Mobile Technology, L.P. Boom with mast assembly
US6561368B1 (en) 2000-05-01 2003-05-13 Par Systems, Inc. Telescoping tube assembly with a cabling system
US20020045172A1 (en) * 2000-06-30 2002-04-18 Sturm Albert J. Segmented support structure and method and fixture for making the same
US6499612B1 (en) 2001-07-27 2002-12-31 Link-Belt Construction Equipment Co., L.P., Lllp Telescoping boom assembly with rounded profile sections and interchangeable wear pads
US20070098536A1 (en) * 2005-10-31 2007-05-03 Kooima Roger D Extendable telescoping boom and method of manufacturing
US7624967B1 (en) 2006-04-19 2009-12-01 Par Systems, Inc. Opposed-rope hoist driven telescoping mast
US20080164233A1 (en) * 2007-01-10 2008-07-10 Stellar Industries, Inc. Roller boom rest
US8122696B2 (en) * 2008-07-08 2012-02-28 Cnh America Llc Guides for an extendable harvesting header
US20100011731A1 (en) * 2008-07-08 2010-01-21 Bart Moutton Guides for an extendable harvesting header
US20120085723A1 (en) * 2010-10-08 2012-04-12 Liebherr-Werk Ehingen Gmbh Boom element, telescopic boom and construction vehicle
US9033165B2 (en) 2011-02-09 2015-05-19 Oshkosh Corporation Crane assembly
US9938121B2 (en) 2011-02-09 2018-04-10 Oshkosh Corporation Crane assembly
US10221048B2 (en) 2011-02-09 2019-03-05 Oshkosh Corporation Crane assembly
CN102887443A (zh) * 2011-07-21 2013-01-23 马尼托瓦克起重机有限责任公司 用于建设机器的拼焊板梁及其制造方法
US20130020274A1 (en) * 2011-07-21 2013-01-24 Arumugam Munuswamy Tailor welded panel beam for construction machine and method of manufacturing
US9290363B2 (en) * 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
CN102887443B (zh) * 2011-07-21 2016-12-21 马尼托瓦克起重机有限责任公司 用于建设机器的拼焊板梁及其制造方法
CN103174715A (zh) * 2011-12-23 2013-06-26 苏州海伦哲专用车辆有限公司 一种伸缩臂滑块装置
CN111498758A (zh) * 2020-04-09 2020-08-07 中联重科股份有限公司 U型臂架组件、u型臂和高空作业设备

Also Published As

Publication number Publication date
GB1122936A (en) 1968-08-07
DD65647A5 (de) 1969-02-20
DE1281651B (de) 1975-02-13
DE1281651C2 (de) 1975-02-13

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