US3430778A - Load lifting - Google Patents

Load lifting Download PDF

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Publication number
US3430778A
US3430778A US623344A US3430778DA US3430778A US 3430778 A US3430778 A US 3430778A US 623344 A US623344 A US 623344A US 3430778D A US3430778D A US 3430778DA US 3430778 A US3430778 A US 3430778A
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US
United States
Prior art keywords
jib
section
sections
pivot
derrick
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
US623344A
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English (en)
Inventor
David J B Brown
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.)
Winget Ltd
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Winget Ltd
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Filing date
Publication date
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Publication of US3430778A publication Critical patent/US3430778A/en
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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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths

Definitions

  • a jib for a load lifting apparatus comprising at least two interconnected sections, with pivot means and locking means disposed between two of the adjacent sections so that the sections may be locked as a jib or be released so that the section may be folded into a retracted storage position.
  • a further object of the invention is to provide for lutfing and derricking the a jib without the use of a winch.
  • a load lifting apparatus having a jib composed of two or more interconnected sections, at least one section being mounted to pivot about a pivot centre on an adjacent section, whereby the one section may be positioned in alignment with an adjacent section for use of the jib or to pivot relative to the adjacent section to a storage position for transportation purposes, and including locking members for locking the sections into alignment for use of the jib.
  • FIGURE 1 is a diagrammatic side view of a mobile crane showing the jib in the operative position;
  • FIGURE 2 is a View similar to FIGURE 1 on a larger scale and with the jib in the inoperative position as for transportation purposes;
  • FIGURE 3 is a side elevation of the crane shown in FIGURES 1 and 2 on a larger scale.
  • FIGURE 4 is a perspective view showing two sections of the jib which are mounted to pivot with respect to each other showing the locking arrangement.
  • a mobile crane which has a chassis 1 provided with stabilising legs 2 slidable within the chassis 1 as described in our copending patent application No. 11,675/66.
  • the chassis 1 carries on its upper surface a turntable unit 3 which in turn carries on its upper surface a main frame 4, the Who-1e providing in practice a chassis.
  • Attached to the front and rear of the main frame 4 are pivot links 6 and hydraulic couplings 7 which carry front and rear wheel axles 8 and 9 respec tively.
  • the rear axle 9 may correspond to that described in our copending patent application No. 11,284/66 and is connected to a drive motor (not shown) by a transmission shaft (not shown).
  • a drives cab 11 Towards the front and on one side of the upper part of the main frame 4 is a drivers cab 11 from which all the operations of the crane are controlled.
  • a jib 12 which is mounted by means of a pivot shaft 13 extending between side'- arms (not shown) of the main frame 4.
  • the jib 12 comprises an inner section 14 of which the inner end is pivotally mounted between the side arms by the pivot shaft 13, two centre sections 15, 16 and an outer section 17.
  • the outer section 17 carries conventional cable pulleys 20 mounted on bearings brackets 21 carried by the outer section 17.
  • the tWo centre sections 15, 16 are rigidly locked together by bolts 21 extending through apertures provided in brackets 23 carried by the adjacent ends of the sections 15, 16.
  • the free ends of the sections 15 and 16 each are similar and for convenience the end section 15 will be described with reference to FIGURE 4.
  • Projecting from one edge of a section is a pair of spaced pivot brackets 25 (FIG. 4) each having two apertures 26-, and on the opposite side of the sections are a pair of lugs 28 each having an aperture 29.
  • the apertures 26 in the spaced brackets 25 and the apertures 29 in the spaced lugs 28 respectively are coaxial.
  • the ends of the inner and outer sections 14 and 17 respectively are similar and for convenience reference will be made to the inner section 14.
  • the inner sections 14 have a pair of pivot brackets 30, provided with a pair of apertures 31, and a pair of lugs 32 provided with an aperture 33, arranged to correspond to the brackets 25 and lugs 28 with the respective apertures being coaxial.
  • the section 15 is connected to the inner sections 14 by pivot pins 35 passing through one of the apertures 26 in each of the brackets 25 and one of the apertures 31 in each of the brackets 30.
  • Links 40 extend from each of the pins 37 which engages the apertures 26 in the pivot brackets 25 to connect with diametrically opposite projections 41 of a star wheel 42 pivotally carried by the section 15.
  • links 44 extend from the locking pins 37 mounted to engage the apertures 29 of the lugs 28 to connect with the opposite arms 45 of a bell crank lever 46 similarly mounted to pivot on the section 15.
  • an arm 48 of the bell crank lever 44 and an arm 49 of the star wheel are interconnected by a rod and a further arm 52 of the star wheel 42 is connected to the ram of a pneumatic or hydraulic cylinder 53.
  • the ram moves the star wheel 42 which on rotation transmits movement to the locking pins 37.
  • the locking pins may be manually operated. The description has been made to the locking pins 37 being carried by the section 15 but the arrangement may be reversed so that the pins are carried by the section 14. Alternatively, the pins 37 may be carried by a separate locking unit which is attached between two sections which are to pivot with respect of each other. When the sections are locked with their longitudinal axles in alignment the jib extends as a single rigid unit.
  • a hydraulic derrick jack 66 Mounted on each side of the inner jib section 14 and on the same pivot shaft 13 as the inner end of the inner jib section is a hydraulic derrick jack 66.
  • a ram 61 extends from each of the hydraulic jacks and the rams 61 are connected at their free ends to the upper end of a derrick portal frame 62 of which the lower ends are attached to the main frame 4 by pivot pins 63 extending through mounting brackets (not shown) carried at a position remote from the pivot shaft 13 for the inner jib section 14.
  • the derrick portal frame 62 On extension and retraction of the rams 61 of the hydraulic jacks 60 the derrick portal frame 62 is caused to articulate in a vertical plane about its pivots 63.
  • One end of a pair of links 65 is attached at the upper free end of the derrick portal frame 62 by pivot pins 66 and cables 67 extend from between the free ends of the links 65 to bet-ween the free ends of links 71 mounted on each side of the upper end of the outer jib section 17.
  • a compression strut 68 having a slidable rod 69 adjustable with respect of the housing of the strut 68 is connected to the upper end of the derrick portal frames 62 by the pivot pin 66 and extends to the jib section 15 where it is connected by a pivot shaft 70 which extends between opposite sides of the section 15.
  • the upper end of the derrick portal frame 62 carries between the link arms 65 a bolster support unit 72 which provides a rest for the centre jib section 15, 16 when the jib is in the storage or transportation position to be described later.
  • a conventional drum 75 for a cable 76 is provided by the main frame 4 and to which is anchored one end of the cable 76 used for load lifting or lowering.
  • the cable 76 passes over guide pulleys 77 carried by the sections 14, 15, 16 and 17, and the cable pulleys 78 at the free end of the outer section 17.
  • the jib may be moved to any positions about the chassis 1 by rotation of the turntable 3.
  • the jib When it is required to move the crane after use the jib is lowered into a horizontal position by retracting the rams 61 within the hydraulic derrick jacks 60 as shown in dotted outline in FIGURE 2. In the lowered horizontal position the weight of the jib is carried by the derricking cables 67. Withdrawal of the locking pins 37 attaching jib sections 14 and 15 allows section 14 to pivot at 13 and 35 and kneel upon the ground or near to the ground being supported by sliding stays attached between section 14 and the lower part of main frame 4 (not shown). This kneeling motion of section 14 is imparted by hydraulic retraction of jacks 60. The locking pins 37 are withdrawn from the apertures 26 in the brackets 25 and the apertures 29 in the lugs 28 so that the upper section 17 and the centre section 16 may pivot about their pivot pins 35.
  • the jib length can be increased by adding sections to the centre of outer sections or if desired the jib can be provided with simply two sections, i.e., an inner and outer section and in which case there will only be one region of fold. Also there may be provided more than two fold regions such as between the two sections of the centre section of the particular embodiment described.
  • the pulley over which the cable used for hoisting and lowering may be replaced by a bucket carrying unit so that the apparatus may be converted to an excavator.
  • the length of jib can again be adjusted to suit the operational requirements by inserting and removing sections as required.
  • a load lifting apparatus having a chassis and a jib carried by said chassis, the improvement of which comprises:
  • one section being pivotally connected to the chassis
  • a derrick portal frame pivotally connected to the chassis remote from the pivotal connection of said one section
  • jack means including a ram having one end connected coaxially with the pivot connection between said one section and the chassis;
  • pivot means connecting the free end of said jack means to the free end of said derrick portal frame.
  • a load lifting apparatus comprising means interconnecting said free end of said derrick portal frame to the other section of said jib whereby movement of said ram of said jack transmits motion to said derrick portal frame which in turn transmits motion to said jib.
  • a load lifting apparatus comprising a bolster unit carried by said derrick portal frame for engagement by said other jib section when said jib is in a storage position.
  • said locking means including four locking pins slidably mounted in bracket means on one of said sections and engageable within lugs carried by the other of said sections;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US623344A 1966-03-17 1967-03-15 Load lifting Expired - Lifetime US3430778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB01674/66A GB1179394A (en) 1966-03-17 1966-03-17 Mobile Load Lifting Apparatus

Publications (1)

Publication Number Publication Date
US3430778A true US3430778A (en) 1969-03-04

Family

ID=9990604

Family Applications (1)

Application Number Title Priority Date Filing Date
US623344A Expired - Lifetime US3430778A (en) 1966-03-17 1967-03-15 Load lifting

Country Status (6)

Country Link
US (1) US3430778A (xx)
BE (1) BE695728A (xx)
DE (1) DE1481873A1 (xx)
GB (1) GB1179394A (xx)
NL (1) NL6704089A (xx)
SE (1) SE321779B (xx)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664516A (en) * 1970-07-30 1972-05-23 Armco Steel Corp Folding crane boom
US3794184A (en) * 1973-01-15 1974-02-26 Joyce Burroughs Torregrossa Crane
US4003475A (en) * 1974-11-27 1977-01-18 Fmc Corporation Crane boom lattice and hoist line protection assembly
FR2397363A1 (fr) * 1977-07-14 1979-02-09 Harnischfeger Corp Moyens de rangement et de raccordement de la flechette a la fleche telescopique d'une grue
US5140929A (en) * 1990-05-03 1992-08-25 Ppm Zone Industrielle De La Saule Handling boom comprising a main boom and an additional boom
US5960970A (en) * 1996-04-26 1999-10-05 Manitowoc Crane Group Inc Multiple position wire rope guide
US6186347B1 (en) * 1998-07-07 2001-02-13 Mannesmann Ag Mobile crane with a telescopic jib
US6213318B1 (en) * 1999-03-01 2001-04-10 Manitowoc Crane Group, Inc. Rotatable connection system for crane boom sections
US7878346B1 (en) 2008-08-25 2011-02-01 Link-Belt Construction Equipment Co., L.P., Lllp Adaptable boom extension for a mobile crane having a telescoping boom
US20110233165A1 (en) * 2007-11-29 2011-09-29 Manitowoc Crane Companies, Llc Connection system for crane boom segments
US20120067840A1 (en) * 2010-09-20 2012-03-22 Walker Robert J Pinned connection system for crane column segments
US20140131300A1 (en) * 2012-11-09 2014-05-15 Gru Comedil S.R.L. Jib for a crane
US20140339188A1 (en) * 2013-04-11 2014-11-20 Liebherr-Werk Ehingen Gmbh Telescopic Boom and Crane
US9051159B2 (en) 2012-12-20 2015-06-09 Manitowoc Crane Companies, Llc Column connector system
US9121425B2 (en) 2007-11-29 2015-09-01 Manitowoc Crane Companies, Llc Connection system for crane components
EP3369690A1 (en) * 2017-03-02 2018-09-05 Manitowoc Crane Companies, LLC Jib coupling system for jib stowage
US10647552B1 (en) * 2015-09-25 2020-05-12 Link-Belt Cranes, L.P., Lllp Fly connection system for a crane boom
US11247878B2 (en) * 2016-12-02 2022-02-15 Xuzhou Heavy Machinery Co., Ltd. Operating method of a wind power jib of a crane and crane

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819803A (en) * 1954-10-12 1958-01-14 Leo B Obenchain Boom for cranes
US2874851A (en) * 1954-12-17 1959-02-24 Maschf Augsburg Nuernberg Ag Vehicle-mounted revolving crane with folding jib
US3080068A (en) * 1960-12-15 1963-03-05 Alphie O Felkner Sectional boom for cranes
US3085695A (en) * 1961-03-23 1963-04-16 Carl A Miller Hinge for crane boom
US3173549A (en) * 1962-03-22 1965-03-16 Emil A Bender Material handling device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2819803A (en) * 1954-10-12 1958-01-14 Leo B Obenchain Boom for cranes
US2874851A (en) * 1954-12-17 1959-02-24 Maschf Augsburg Nuernberg Ag Vehicle-mounted revolving crane with folding jib
US3080068A (en) * 1960-12-15 1963-03-05 Alphie O Felkner Sectional boom for cranes
US3085695A (en) * 1961-03-23 1963-04-16 Carl A Miller Hinge for crane boom
US3173549A (en) * 1962-03-22 1965-03-16 Emil A Bender Material handling device

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664516A (en) * 1970-07-30 1972-05-23 Armco Steel Corp Folding crane boom
US3794184A (en) * 1973-01-15 1974-02-26 Joyce Burroughs Torregrossa Crane
US4003475A (en) * 1974-11-27 1977-01-18 Fmc Corporation Crane boom lattice and hoist line protection assembly
FR2397363A1 (fr) * 1977-07-14 1979-02-09 Harnischfeger Corp Moyens de rangement et de raccordement de la flechette a la fleche telescopique d'une grue
US4141455A (en) * 1977-07-14 1979-02-27 Harnischfeger Corporation Means for storing and connecting jib on telescopic crane boom
US5140929A (en) * 1990-05-03 1992-08-25 Ppm Zone Industrielle De La Saule Handling boom comprising a main boom and an additional boom
US5960970A (en) * 1996-04-26 1999-10-05 Manitowoc Crane Group Inc Multiple position wire rope guide
US6186347B1 (en) * 1998-07-07 2001-02-13 Mannesmann Ag Mobile crane with a telescopic jib
US6213318B1 (en) * 1999-03-01 2001-04-10 Manitowoc Crane Group, Inc. Rotatable connection system for crane boom sections
US9187296B2 (en) 2007-11-29 2015-11-17 Manitowoc Crane Companies, Llc Connection system for crane column segments
EP3028982A1 (en) * 2007-11-29 2016-06-08 Manitowoc Crane Companies, LLC Connection system for crane boom segments
EP2065332A3 (en) * 2007-11-29 2011-11-02 Manitowoc Crane Companies, Inc. Connection system for crane boom segments
US20110233165A1 (en) * 2007-11-29 2011-09-29 Manitowoc Crane Companies, Llc Connection system for crane boom segments
US8534474B2 (en) 2007-11-29 2013-09-17 Manitowoc Crane Companies, Llc Connection system for crane boom segments
US9121425B2 (en) 2007-11-29 2015-09-01 Manitowoc Crane Companies, Llc Connection system for crane components
EP2818443A1 (en) * 2007-11-29 2014-12-31 Manitowoc Crane Companies, LLC Connection system for crane boom segments
RU2525162C2 (ru) * 2007-11-29 2014-08-10 Манитовок Крейн Кампениз, Инк. Система соединения для сегментов стрелы крана
US7878346B1 (en) 2008-08-25 2011-02-01 Link-Belt Construction Equipment Co., L.P., Lllp Adaptable boom extension for a mobile crane having a telescoping boom
US8739988B2 (en) * 2010-09-20 2014-06-03 Manitowoc Crane Companies, Llc Pinned connection system for crane column segments
US20120067840A1 (en) * 2010-09-20 2012-03-22 Walker Robert J Pinned connection system for crane column segments
US20140131300A1 (en) * 2012-11-09 2014-05-15 Gru Comedil S.R.L. Jib for a crane
US9051159B2 (en) 2012-12-20 2015-06-09 Manitowoc Crane Companies, Llc Column connector system
US20140339188A1 (en) * 2013-04-11 2014-11-20 Liebherr-Werk Ehingen Gmbh Telescopic Boom and Crane
US9908751B2 (en) * 2013-04-11 2018-03-06 Liebherr-Werk Ehingen Gmbh Telescopic boom and crane
US10647552B1 (en) * 2015-09-25 2020-05-12 Link-Belt Cranes, L.P., Lllp Fly connection system for a crane boom
US11247878B2 (en) * 2016-12-02 2022-02-15 Xuzhou Heavy Machinery Co., Ltd. Operating method of a wind power jib of a crane and crane
EP3369690A1 (en) * 2017-03-02 2018-09-05 Manitowoc Crane Companies, LLC Jib coupling system for jib stowage
US10589966B2 (en) 2017-03-02 2020-03-17 Manitowoc Crane Companies, Llc Jib coupling system for jib stowage

Also Published As

Publication number Publication date
GB1179394A (en) 1970-01-28
NL6704089A (xx) 1967-09-18
SE321779B (xx) 1970-03-16
DE1481873A1 (de) 1969-10-30
BE695728A (xx) 1967-09-11

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