US3338428A - Crane having a principal mast and a pivotable auxiliary jib - Google Patents

Crane having a principal mast and a pivotable auxiliary jib Download PDF

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Publication number
US3338428A
US3338428A US548599A US54859966A US3338428A US 3338428 A US3338428 A US 3338428A US 548599 A US548599 A US 548599A US 54859966 A US54859966 A US 54859966A US 3338428 A US3338428 A US 3338428A
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United States
Prior art keywords
mast
principal
jib
winch
crane
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Expired - Lifetime
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US548599A
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English (en)
Inventor
Weber Svend Jorgen
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BYGGERIETS MASKINSTATIONER AS
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BYGGERIETS MASKINSTATIONER AS
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Application filed by BYGGERIETS MASKINSTATIONER AS filed Critical BYGGERIETS MASKINSTATIONER AS
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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
    • B66C23/18—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
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • 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

Definitions

  • This invention relates to a crane comprising a principal mast, the lower end of which is pivotably connected to a winch frame, said principal mast carrying a pivotable auxiliary jib and a supporting lever for same, the free ends of said auxiliary jib and of said supporting lever being connected with each other by means of a stay rope or a stay rope set, said crane further comprising an elevating lever for the principal mast, one end of said elevating lever being pivotably connected with the foot of the principal mast or with the winch frame, the other, free end of said elevating lever being connected with the top of said principal mast by means of a holding rope or a holding rope set, said elevating lever further carrying a pulley or set of pulleys for a hauling winch mounted on the winch frame, the angular position of said auxiliary jib relative to said principal mast being adjustable by means of a jib rope or jib rope set which is connected with the free end of said supporting lever.
  • a crane of this type may be used in the following manner:
  • the principal mast is elevated by operation of the hauling winch, the force being transferred from the latter via the pulley or set of pulleys at the free end of the elevating-lever to the top of the principal mast by means of the holding rope or holding rope set.
  • the angular position of the auxiliary jib may be varied by hauling or slackening the jib rope or ji-b rope set which will transfer the force to the free end of the supporting lever, which again, by way of the stay rope or stay rope set, will move the auxiliary jib whereby a crane hook suspended from the top of the latter is moved in a horizontal direction.
  • a hoisting rope with an associated hoisting Winch on the winch frame of the crane may also have an additional hook which, by means of an additional hoisting rope, is suspended from a pulley at the top of the principal mast, an additional hoisting winch being associated with said additional hoisting rope.
  • an additional hoisting winch being associated with said additional hoisting rope. It will be realized that such a crane may comprise no less than four winches, viz. a hauling winch, a jib and two hoisting winches.
  • the set of pulleys at the free end of the elevating lever and the set of pulleys of the hauling winch comprise many pulleys, it is a comprehensive operation to perform the said change-over, and, moreover, the hauling rope must again be engaged with the set of pulleys at the free end of the elevating lever When the principal mast is to be lowered.
  • the object of the invention to devise a crane of the type referred to which may, in a simple manner, he re-arranged so that the hauling winch may also be used for operation of the auxiliary jib.
  • the said pulley or set of pulleys at the free end of said elevating lever is detachably connected with the latter and is connected with said jib rep or ropes for said jib, the crane being constructed with means for releasably locking said elevating lever relative to said winch frame in the elevated position of said principal mast.
  • the hauling winch may be used for operating the jib rope or jib rope set without any complicated re-arrangement, all that is necessary being to detach the pulley or set of pulleys from the free end of the elevating lever after the latter has been locked to the winch frame by means of the said locking means in the elevated position of said principal mast.
  • FIG. 1 shows one form of a crane according to the invention in lowered position
  • FIG. 2 the crane in elevated position
  • FIG. 3 part of the crane on an enlarged scale
  • FIG. 4 a section along the line IV-IV in FIGURE 3.
  • 1 is the principal mast of the crane which, at its lower end, is pivotably connected to a winch frame by means of a trunnion 2.
  • An auxiliary jib 5 is pivotably connected to the top 4 of the principal mast 1, and at its outer end carries a pulley 6 for a hoisting rope 7 carrying a crane hook 8.
  • a supporting lever 9 which is pivotably connected to the top 4 of the principal :mast 1 and the outer end of which is connected with the outer end of the auxiliary or oscillatory jib 5 by means of two stay ropes 10 of which only one is visible on the drawing because the other is hidden behind the stay rope shown.
  • the supporting lever 9 carries a guiding roller 11 for the hoisting rope 7.
  • Pivotably connected to the trunnion 2 is also an elevating lever 12, the outer end of which is connected wit-h the top 4 of the principal mast 1 by two holding ropes 13 of which only one is visible on the drawing because the other is hidden behind the holding rope shown.
  • the outer end of the elevating lever 12 carries a set of pulleys 14 for a hauling rope 15 which passes around a corresponding set of pulleys 16 on the winch frame 3, and is operated by means of a hauling winch 17.
  • the hoisting rope 7 is operated by means of a hoisting winch 18 which is also mounted on the winch frame 3.
  • the crane may have an additional winch for a hoisting rope passing around a pulley at the top 4 of the principal mast 1 and carrying a hook for heavy loads.
  • the winch frame is provided at its bottom with a swivel ring 19 for co-operation with a swivel ring 20 carried by a foundation 21.
  • the frame 3 also carries a counterweight 22 and the whole frame can be rotated about a vertical central axis 23.
  • the set of pulleys 14 is detachably connected with the end of the elevating lever 12 such as illustrated in FIGURES 3 and 4.
  • the elevating lever 12 consists of two arms 27, only one of which is shown in FIGURES 3 and 4.
  • An elongated plate 28 is welded to each of the arms 27 on each side thereof, said plate 28 having two holes 29 and 30 of which the upper hole 29 serves for attachment of the holding ropes 13, while the lower hole 30 serves for attachment of the tightening screws 26.
  • the pulleys 14 are rotatably mounted on a hollow hub 31 to each end of which there is connected a side plate 32, each of these side plates having a hole 33 for the attachment of the lower ends of the jib ropes 24.
  • Each of the arms 27 with associated plates 28 has a hole for receiving locking pins 34, one of which is shown in FIGURE 4, said locking pins being adapted to engage with the hollow hub 31.
  • This construction provides a means of readily releasing the set of pulleys 14, viz. by withdrawing the locking pins 34 so that the hauling winch 17 may now immediately be used for operating the auxiliary jib .since it is connected with the jib rope 24.
  • This is illustrated in FIGURE 2 where 5' represents a changed position of the jib 5 in dotted lines. This means that the hauling rope 15 has been slackened until the set of pulleys 14 assumes the floating position illustrated at 14'.
  • the rigid stay rods 25 may be omitted.
  • single ropes may be used if other means are provided for preventing lateral movements of the crane parts, or if the latter are not at all subjected to forces tending to move them in a lateral direction.
  • a crane having a winch frame, a principal mast, means for pivotably connecting the lower end of said principal mast to said winch frame, a pivotable auxiliary jib carried by said principal mast adjacent the upper end thereof, a supporting lever for said auxiliary jib, stay line means for connecting the free end of said auxiliary jib to said supporting lever, jib line means connected at one of its ends to said free end of said supporting lever, floating pulley means, said jib line means being connected at its other end to said floating pulley, and hauling winch means for operating said auxiliary jib through said floating pulley means, the improvement comprising an elevating lever pivotally mounted on said winch frame adjacent said lower end of said principal mast, holding line means for connecting the free end of said elevating lever with said upper end of said principal mast for effecting raising of the same, means for releasably locking said free end of said elevating lever relative to said floating winch to support said principal mast through said holding line means in erected position, and

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US548599A 1965-05-12 1966-05-09 Crane having a principal mast and a pivotable auxiliary jib Expired - Lifetime US3338428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK239865AA DK106640C (da) 1965-05-12 1965-05-12 Kran med hovedmast og vippelig hjælpeudligger.

Publications (1)

Publication Number Publication Date
US3338428A true US3338428A (en) 1967-08-29

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ID=8112094

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Application Number Title Priority Date Filing Date
US548599A Expired - Lifetime US3338428A (en) 1965-05-12 1966-05-09 Crane having a principal mast and a pivotable auxiliary jib

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US (1) US3338428A (da)
DE (1) DE1456417A1 (da)
DK (1) DK106640C (da)
GB (1) GB1079159A (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100243595A1 (en) * 2009-03-31 2010-09-30 Manitowoc Crane Companies, Llc Folding jib main strut and transportable reeved strut caps

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2435592C2 (de) * 1974-07-24 1981-11-26 Elba Maschinenfabrik Kaiser GmbH & Co, 6670 St Ingbert Turmdrehkran mit einem Laufkatzen- Knickausleger
US5014863A (en) * 1989-04-14 1991-05-14 Iowa Mold Tooling Company, Inc. Vehicle mounted crane
SE531861C2 (sv) * 2008-11-11 2009-08-25 Innotab Ab Anordning för resning/fällning av långsträckta föremål

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037641A (en) * 1961-02-27 1962-06-05 American Hoist & Derrick Co Tower crane attachment
US3134488A (en) * 1962-07-20 1964-05-26 Thew Shovel Co Crane
US3149730A (en) * 1962-06-08 1964-09-22 Bucyrus Erie Co Convertible crane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3037641A (en) * 1961-02-27 1962-06-05 American Hoist & Derrick Co Tower crane attachment
US3149730A (en) * 1962-06-08 1964-09-22 Bucyrus Erie Co Convertible crane
US3134488A (en) * 1962-07-20 1964-05-26 Thew Shovel Co Crane

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100243595A1 (en) * 2009-03-31 2010-09-30 Manitowoc Crane Companies, Llc Folding jib main strut and transportable reeved strut caps
US8839966B2 (en) * 2009-03-31 2014-09-23 Manitowoc Crane Companies, Llc Folding jib main strut and transportable reeved strut caps

Also Published As

Publication number Publication date
DE1456417A1 (de) 1969-01-02
DK106640C (da) 1967-02-27
GB1079159A (en) 1967-08-16

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