US3378147A - Tower crane rotatable on its base - Google Patents

Tower crane rotatable on its base Download PDF

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Publication number
US3378147A
US3378147A US587023A US58702366A US3378147A US 3378147 A US3378147 A US 3378147A US 587023 A US587023 A US 587023A US 58702366 A US58702366 A US 58702366A US 3378147 A US3378147 A US 3378147A
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US
United States
Prior art keywords
tower
crane
tackle
base
pulley
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
US587023A
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English (en)
Inventor
Marrie Paul
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.)
BOILOT PETOLAT ETS
NOUVELLE D'EXPLOITATION des Ets BOILOT-PETOLAT Ste
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BOILOT PETOLAT ETS
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Application filed by BOILOT PETOLAT ETS filed Critical BOILOT PETOLAT ETS
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Publication of US3378147A publication Critical patent/US3378147A/en
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Expired - Lifetime legal-status Critical Current

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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

Definitions

  • An auxiliary tackle or secondary pulley system is employed at the commencement of erection of the tower crane in order to raise the top component and jib of the crane several yards to an intermediate verticallyoriented position. A main tackle system then raises the tower crane to a fully erected position.
  • This invention relates to tower cranes.
  • Struts are provided in this previously proposed crane which are articulated on the one hand to a fixed point on the upper component of the tower or pylon and on the other hand to a point on the pivotal platform. Provision is also made in the prior proposal for the point of attachment of the set of pulley blocks, at the operating winch side, to include a fixed pin journalled in a member rigidly attached to the platform.
  • the tower is folded, when in the transportation configuration, with the two components superimposed, and with the jib resting on top of the upper component.
  • the tower is first erected. To do this, a pull is exerted on the articulation between the two tower components through a tackle, causing it to rear up, while two lateral struts, articulated to the pivotal base and to the upper component, of the tower, keep the latter straight as it rises.
  • the present applicant also envisaged previously imnrovements regarding changes both in the method of articulating the struts to the upper component of the tower or pylon and in the particular method of attachment of the tackle to the pivotal platform, as Well as in the locking of the two parallel struts on the upper components of the tower when this is extended, to prevent an inadvertent reversal of the action.
  • both the erection and dismantling of the crane were each continuous operations.
  • the action was continuous and the extension of the various components was carried out simultaneously, the forces having to be applied at the start of erection being in excess of the actual weights involved.
  • each strut attached to the tower is no longer articulated to it by means of a fixed pin, but with the aid of a pin arranged to slide in a guide, so that, while the bottom of the tower is rising, the end of each strut follows the path of these guides, during which action the top end of the tower remains resting on a cross-piece fixed to the pivotal platform.
  • the pull of the tackle is used for raising the top end of the tower, by virtue of the point of attachment of the fixed pulley of the tackle being yoked to one end of a lever having two converging arms, articulated at a fixed point to the pivotal platform, the free end of the second arm being arranged to bear against the underside of the top end of the tower in such a way as to bring about a gradual lift when the pulley-block cables are tensioned.
  • An object of the present invention is to enable the lifting principle described in the patent mentioned hereinbefore to be extended to still heavier cranes.
  • a tower crane a base, a first elongate structure pivotally mounted on the said base, a second elongate structure pivotally connected at one end to the end of the first elongate structure remote from the base, jib means mounted at the end of the second elongate structure remote from the pivotal connection to the first structure, strut means pivotally connected at each end respectively to the base and to the second elongate structure, auxiliary structure connected to the base and capable of being moved to an upright position during erection of the crane, a first pulley system, a second pulley system, a cable common to both said pulley systems, and a member movable along said auxiliary structure and arranged to support, at least in part, said first elongate structure as the latter is moved towards an upright position, said second pulley system being arranged to bring said member and the first elongate structure to an intermediate position and said first pulley system being arranged to bring said first and second elongate structures
  • the crane in accordance with the invention includes a double tackle system having two separate functions, one tackle acting in accordance with the previous patent, while the other, in conjunction with the first, serves to raise the top component of the tower and the jib several yards in a vertical plane, the first tackle completing the associated raising of the articulation of the two tower components.
  • auxiliary tackle thus enables the upper component of the tower to be raised in the most favourable Conditions in relation to the lower component, at the time when the forces to be applied are highest, the main tackle being brought into play for continuing the action of extension only when the main effort needed for the initial stages of the lift has been applied.
  • the essential distinguishing feature of the present invention is thus the addition to the tackle used in the main patent of a second tackle, the lifting action of which is restricted in time and space, this action being carried out in the most favourable dynamic conditions possible, at the commencement of erection, that is to say when the lifting strain to be overcome is at its highest.
  • FIGURE 1 shows in side elevation the crane ready for conveyance, the uprights having been lowered to the horizontal and both the main and auxiliary tackles not being under tension;
  • FIGURE 2 shows in side elevation the crane ready for raising, the jib having been opened out and the upper component of the tower itself having been extended and fixed in position according to the overall crane height aimed at; the main and auxiliary tackles are under tension, the uprights thus being raised, and the cross-piece for lifting the top component of the tower is bearing against the underside of the latter;
  • FIGURE 3 is a perspective view showing the position of the crane at the moment when the cross-piece has reached the end of its travel at the upper free end of the uprights, when the pull of the main tackle is alone sufficient to complete the extension action in progress in accordance with the patent hereinbefore referred to;
  • FIGURE 4 shows the crane erected, the tackle cable being slack and the uprights having been lowered on to the struts.
  • S is the pivotal base of the crane, P1 the lower crane component, P2 the upper crane component and P?. a telescopic portion of P2, which can be opened out depending upon the desired overall height of the crane.
  • the crane jib is referenced F.
  • two lateral parallel struts G are articulated at Go to a structure rigidly attached to the pivotal base S.
  • FIGURE 3 shows the run of pulley cable X, which is taken continuously round the two half-tackles M1 and M'l of the main tackle and over the auxiliary tackle M2.
  • This cable X starts from a drum W of the operating winch and runs over the small mobile pulley A1, then under fixed pulley C1, returning to pass over mobile pulley B1 and fixed pulley D1.
  • From D1 the cable rises to pulley E1, at the top end of the first upright V, then passes under T1 and T2 and back up to pulley E2, at the top end of the second upright V.
  • the cable runs under pulleys D2 and B2, returns over C2 and back under A2 and is attached near C2 to a fixed point Y. This forms the second half of the tackle, M'l.
  • Auxiliary structure in the form of uprights V which are lowered to the horizontal while the crane is being moved from site to site, are automatically raised by the pull on cable X at the commencement of erection, the upper component P2 of the tower being then raised by a cross-piece T, moved by tackle M2 in a direction parallel to the uprights V.
  • the height of these uprights V is not limited, but is so chosen that, when cross-piece T ceases to move, the angle between the two tower sections P1 and P2 is wide enough.
  • tackle M2 When tackle M2 has finished raising P2 and F, the pull of cable X then acts on tackle Ml-Ml, which, by means of cable Z, attached at Z1 and Z2 to the spindle of pulleys B1 and B2, is able by itself alone to raise P1 and simultaneously to complete the raising of P2, F2 and F.
  • a second elongate structure pivotally connected at one end to the end of the first elongate structure remote from the base
  • jib means mounted at the end of the second elongate structure remote from the pivotal connection to the first structure
  • strut means pivotally connected at each end respectively to the base and to the second elongate structure
  • auxiliary structure connected to the base and capable of being moved to an upright position during erec tion of the crane
  • said second pulley system being arranged to bring said member and the first elongate structure to an intermediate position and said first pulley system being arranged to bring said first and second elongate structures to a fully erected position.
  • said base being mounted on said support structure for pivotal movement about a vertical axis.
  • auxiliary structure includes:
  • said elongate members carrying the second pulley system at the ends thereof remote from the base.
  • a tower crane according to claim 3 wherein the movable member is a cross-piece and is movable along said elongate members.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US587023A 1965-11-09 1966-10-17 Tower crane rotatable on its base Expired - Lifetime US3378147A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR37779A FR89037E (fr) 1965-11-09 1965-11-09 Nouveau procédé de montage de grue à tour tournant du bas

Publications (1)

Publication Number Publication Date
US3378147A true US3378147A (en) 1968-04-16

Family

ID=8592147

Family Applications (1)

Application Number Title Priority Date Filing Date
US587023A Expired - Lifetime US3378147A (en) 1965-11-09 1966-10-17 Tower crane rotatable on its base

Country Status (5)

Country Link
US (1) US3378147A (instruction)
BE (1) BE687366A (instruction)
ES (1) ES332601A2 (instruction)
FR (1) FR89037E (instruction)
GB (1) GB1106837A (instruction)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433368A (en) * 1966-12-23 1969-03-18 Richier Sa Collapsible crane
US3892316A (en) * 1972-01-14 1975-07-01 Potain Sa Crane with folding mast and jib
US4446975A (en) * 1982-03-02 1984-05-08 Koenig Wilhelm Rotary crane
US20030217985A1 (en) * 2002-05-21 2003-11-27 Potain Tower crane with collapsible counter-jib
US20220153558A1 (en) * 2020-11-18 2022-05-19 Jeff Anderson Hoist replacement frame
CN115108470A (zh) * 2022-08-29 2022-09-27 中建八局第二建设有限公司 应用于智能塔机的冗余控制系统及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2148386B1 (instruction) * 1971-08-06 1976-03-26 Potain Sa

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US722552A (en) * 1902-11-14 1903-03-10 Emil Anderson Fire-escape.
US2583958A (en) * 1946-08-20 1952-01-29 Western Oil Tool & Engineering Portable derrick

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US722552A (en) * 1902-11-14 1903-03-10 Emil Anderson Fire-escape.
US2583958A (en) * 1946-08-20 1952-01-29 Western Oil Tool & Engineering Portable derrick

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433368A (en) * 1966-12-23 1969-03-18 Richier Sa Collapsible crane
US3892316A (en) * 1972-01-14 1975-07-01 Potain Sa Crane with folding mast and jib
US4446975A (en) * 1982-03-02 1984-05-08 Koenig Wilhelm Rotary crane
US20030217985A1 (en) * 2002-05-21 2003-11-27 Potain Tower crane with collapsible counter-jib
US7093730B2 (en) * 2002-05-21 2006-08-22 Potain Tower crane with collapsible counter-jib
US20220153558A1 (en) * 2020-11-18 2022-05-19 Jeff Anderson Hoist replacement frame
CN115108470A (zh) * 2022-08-29 2022-09-27 中建八局第二建设有限公司 应用于智能塔机的冗余控制系统及方法

Also Published As

Publication number Publication date
ES332601A2 (es) 1967-11-01
FR89037E (fr) 1967-04-28
BE687366A (instruction) 1967-03-01
GB1106837A (en) 1968-03-20

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