US3532324A - Antisway mechanism - Google Patents

Antisway mechanism Download PDF

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Publication number
US3532324A
US3532324A US731503A US3532324DA US3532324A US 3532324 A US3532324 A US 3532324A US 731503 A US731503 A US 731503A US 3532324D A US3532324D A US 3532324DA US 3532324 A US3532324 A US 3532324A
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United States
Prior art keywords
drums
load
brake
antisway
ropes
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Expired - Lifetime
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US731503A
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English (en)
Inventor
Geoffrey H Crittenden
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PACECO Inc
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PACECO Inc
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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
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads

Definitions

  • the present invention is an improvement and simplification of the apparatus disclosed in US. patent application Ser. No. 564,257 for Antisway Device, filed July 11, 1966, now Pat. No. 3,375,938 by the present inventor and Arthur E. Mills, a co-inventor.
  • the present invention relates to an antisway mechanism and more particularly to an antisway mechanism which arrests or abates the pendulum motion of an elongated load suspended from a mobile lifting platform such as a crane trolley or a mobile crane.
  • a problem usually encountered in the handling of cargo i by mobile cargo cranes and crane trolleys is sway of the load which occurs because the load is suspended by cables and must be moved horizontally by the crane while suspended. Due to this movement, the load usually experiences pendulum motion from the horizontal acceleration and deceleration forces inherent in the movement, and rotational motion from the centrifugal forces which occur in a mobile crane being steered in and around the storage area.
  • Applicants invention has the advantage of having a brake common to all of the sway arresting cables whereby there is coordinated arresting of any sway or rotational motion of the suspended load. Further, the device is a simpler and cheaper mechanism since only one brake is used instead of four individual ones.
  • the present invention is an antisway mechanism designed primarily for use on container handling cranes to arrest the pendulum or rotational motion of the elongated containers when suspended by cables.
  • the present invention can be utilized for arresting sway in a wide variety of suspended loads.
  • the invention is an antisway mechanism for arresting pendulum motion of a suspended load relative to its lifting platform. It comprises at least one rope drum mounted on each end of a shaft which is rotatably secured to the platform. The drums have ropes reelable therefrom and which are secured to-opposite sides of the suspended load. Rewind means are engaged with the drums for taking up slack in the ropes, and brake means are mounted on the shaft for causing work to be done by rope which is pulled oil? of the drums due to sway of the load.
  • Still another object of the present invention is to provide a simplified and less expensive apparatus for arresting pendulum motion of a suspended load.
  • FIG. 1 is a perspective view of a mobile cargo container handling crane with the invention installed thereon;
  • FIG. 2 is an end elevation of the arrangement of the mechanism illustrating the reeving of the sway arresting ropes
  • FIG. 3 is a side elevation in section of the operating mechanism taken along line 3-3 of FIG. 6;
  • FIG. 4 is a cross-sectional view of the brake of the present invention taken along lines 44 of FIG. 3;
  • FIG. 5 is a cross-sectional view of an alternative brake means
  • FIG. 6 is a top plan view of the present invention secured to a lifting platform
  • FIG. 7 is a side elevation of FIG. 6;
  • FIG. 8 is a schematic perspective view of the present invention showing a suspended load moving in a first direction of pendulum motion
  • FIG. 9 is a schematic perspective view of the present invention showing a suspended load having rotational sway
  • FIG. 10 is a schematic perspective view of the present invention showing a suspended load being raised.
  • a cargo container lifting spreader 17 is suspended by cables 19 below the movable trolley for picking up either cargo containers 21, individually, or truck trailers 23 with containers on them.
  • the reeving which suspends the lifting spreader and carries the load has substantially vertically depending wire ropes.
  • FIG. 3 shows the antisway mechanism 25 secured to a lifting platform 27 which is usually some form of movable trolley.
  • the apparatus includes a shaft 29 which is rotatably secured to the platform by means of journal bearings 31.
  • the shaft is divided into three portions whereby the outer end sections 33 may be independently removed for repair or replace ment by removing the bolts in the rigid flange couplings 35. This permits the center section 37, including the brake assembly 39, to be left in position when the end sections are taken off, or it can be removed leaving the end sections in position.
  • a brake means is mounted on the shaft for causing work to be done when the arresting ropes 41 are lengthened due to the sway of the load.
  • the brake means includes a rotatable brake drum 43 mounted on the shaft.
  • a brake shoe 45 in the form of a band is secured to the platform 27 for arresting rotation of the brake drum. The shoe is secured with a spring mounting 47 whereby the tension of the band is variable by adjusting the spring retaining nut 49.
  • Two wire rope drums 51 are mounted on each end of the shaft and have wire ropes 41 which are reelable therefrom.
  • the wire ropes extend in opposite directions from the two drums on the same ends of the shaft. Unreeling of the ropes from any of the drums causes unidirectional rotation of the shaft.
  • the wire ropes are reeved through direction changing shackle blocks 53 which are secured to the lifting platform.
  • the ends of the ropes are secured to opposite edges of the suspended load 55.
  • Each of the drums includes an independent internal clutch means (not shown) which interconnects each drum with the shaft for rotating the shaft when rope is pulled off of any one of the wire rope drums.
  • the clutch means are commercially available and are formed to permit the drums to overrun While rope is being rewound onto the rope drums.
  • Rewind means are engaged with the drums for taking up slack in the ropes.
  • This can include independent prewound spring motors 57 engaged with each of the drums. The motors wind the ropes on the drums when the lifting spreader is raised and when the ropes go slack during return sway of the suspended load.
  • the arrangement of a drum, a rope, and a rewind means, without a brake, is known generally as a tag line.
  • FIGS. 5 and 6 show how the antisway mechanism 25 is mounted on the mobile crane.
  • the apparatus can actually be built into a removable frame 59 which can be secured as a unit to the bottom of a lifting platform.
  • the apparatus can be relatively easily and quickly secured to the trolley of a crane as an accessory unit.
  • FIGS. 8, 9 and 10 illustrate the way in which the mechanism operates.
  • the arrows show the direction of motion of the load; the direction the arresting ropes are moving; and the direction of rotation of the drums.
  • FIG. 8 shows the load moving with pendulum motion in a lateral direction.
  • the arresting ropes 41 are being pulled off of the two lower drums 51 at the same end of the shaft by the swinging of the load toward the upper right.
  • the unidirectional clutches turn the shaft causing work to be done on the brake 39 which puts an arresting force on the unreeling of wire ropes from the drums.
  • the upper drums are overrunning and the ropes are being rewound onto them by the spring motors.
  • FIG. 9 shows the load 55 moving with counterclockwise rotational motion.
  • the pairs of drums at each end of the shaft are turning in opposite directions: one of each rewinding and one of each unreeling.
  • the brake 39 applies an arresting force to the two ropes being pulled from the drums.
  • the sway is still arrested since anytime the sway is great enough to pull rope from a drum, work must be done on the brake.
  • FIG. 10 shows the load 55 being lifted whereby all of the ropes are being rewound onto the drums 51 which are overrunning and no work is done on the brake 39. If there is sufiicient sway during lifting to pull rope from the drum, there will be work done on the brake.
  • the brake When the antisway mechanism is used on a low lift crane, such as that shown in FIG. 1, the brake is permanently engaged as shown in FIG. 4, and therefore does work while the load is being lowered. The heat dissipation from the brake can be made adequate for low lift cranes in order to leave the brake engaged at all times.
  • a remotely controllable brake disengagement means can be employed, such as shown in FIG. 5, whereby the brake may be disengaged by the crane operator for lowering the load.
  • a hydraulic cylinder 61 is shown, but an electric solenoid or even mechanical linkage could be used to effect the engagement-disengagement.
  • the apparatus could be effectively used to arrest sway of a point load, or one suspended from a single cable, by running all of the ropes from the direction changing shackle blocks to the hook at the end of the lifting cable or to four opposed points on the load.
  • a simpler unit with only one drum at each end of the shaft, and one rope each, could be used for sway arresting under certain conditions.
  • the present invention has the unique advantage of having only one brake which is common to all of the taglines. This means that the arresting force on each rope is equal. If there are separate brakes, it is possible that unequal arresting forces can occur setting up rotational motion in what previously might only have been pendulum motion. This could be very undesirable in close clearance situations.
  • the increased efficiency and simplicity of this device is an unmeasurable value, but comparison with the prior art shows that the present invention is a distinct improvement over what has been known.
  • An antisway mechanism for arresting pendulum motion of a suspended load relative to its lifting platform, said antisway mechanism comprising:
  • independent rewind means engaged with each of said drums for taking up slack in said ropes
  • brake means mounted on said shaft for causing work to be done by rope being pulled off of said drums due to sway of the load.
  • said brake means includes a remotely controllable brake disengagement means whereby during lowering of the load with respect to the platform, said brake means may be disengaged.
  • said brake means includes:
  • a brake shoe effectively secured to said platform for engaging said brake drum, and said rewind means includes,
  • independent clutch means engaged with each of said drums for rotating said shaft when rope is pulled off of the rope drums and for overrunning when rope is rewound onto the rope drums by the rewind means.
  • An antisway mechanism for arresting pendulum motion of a suspended load relative to its lifting platform comprising:
  • independent clutch means engaged with each of said drums for rotating said shaft when rope is pulled from said drums and for overrunning when rope is rewound onto the rope drums
  • independent spring motors engaged with each of said drums for rewinding the ropes on said drums when said ropes go slack.
  • said brake means includes a remotely controllable brake disengagement means whereby during lowering of the load with respect to the platform, said brake means may be disengaged.
  • the antisway mechanism of claim 4 including a frame for supporting said shaft and which may be secured to said platform whereby said mechanism is removably secured as an accessory unit to said platform.
  • An antisway mechanism for arresting pendulum motion of a suspended load relative to its lifting platform comprising:
  • independent clutch means engaged with each of said drums for rotating said shaft when rope is pulled from said drums and for overrunning when rope is rewound onto the rope drums
  • independent spring motors engaged with each of said drums for rewinding the ropes on said drums when said ropes go slack.
  • said brake means includes a remotely controllable brake disengagement means whereby during lowering of the load with respect to the platform, said brake means may be disengaged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Braking Arrangements (AREA)
  • Control And Safety Of Cranes (AREA)
US731503A 1968-05-23 1968-05-23 Antisway mechanism Expired - Lifetime US3532324A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73150368A 1968-05-23 1968-05-23

Publications (1)

Publication Number Publication Date
US3532324A true US3532324A (en) 1970-10-06

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Application Number Title Priority Date Filing Date
US731503A Expired - Lifetime US3532324A (en) 1968-05-23 1968-05-23 Antisway mechanism

Country Status (6)

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US (1) US3532324A (xx)
BE (1) BE773480Q (xx)
DE (1) DE1925849A1 (xx)
FR (1) FR2009171A1 (xx)
GB (1) GB1213106A (xx)
NL (1) NL162034C (xx)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743107A (en) * 1970-08-04 1973-07-03 J Verschoof Device for preventing a body depending from ropes from swinging
US3746182A (en) * 1970-07-08 1973-07-17 H Tax Oscillation damping arrangement for the load carrier of a hoist
US3828940A (en) * 1971-09-03 1974-08-13 Fruehauf Corp Spreader list, trim and skew adjustment means
US3837503A (en) * 1971-04-27 1974-09-24 Ishikawajima Harima Heavy Ind Hoisting device for use with cranes
US3900114A (en) * 1972-10-07 1975-08-19 Hitachi Ltd Crane apparatus
US3912228A (en) * 1974-05-31 1975-10-14 Ocean Drilling Exploration Integrated chain-wire rope mooring system
US3945504A (en) * 1974-03-11 1976-03-23 Fruehauf Corporation Anti-sway system for a spreader suspended from a crane
US4135628A (en) * 1976-11-12 1979-01-23 Marathon Letourneau Company Hoisting apparatus with improved anti-sway system
US4544070A (en) * 1983-02-16 1985-10-01 Mi-Jack Products, Inc. Sway control arrangement for hoist systems
EP0192446A1 (en) * 1985-02-19 1986-08-27 Marine Travelift, Inc. Suspended load positioning stabilizing system
US4807767A (en) * 1983-12-20 1989-02-28 Grumman Aerospace Corporation Self balancing electric hoist
US5186342A (en) * 1990-11-07 1993-02-16 Paceco Corp. Integrated passive sway arrest system for cargo container handling cranes
US5240298A (en) * 1990-08-21 1993-08-31 Teaby Gregory W Load-lifting and orienting apparatus
US5603598A (en) * 1994-04-11 1997-02-18 Paceco Corp. Guide chute for cargo container handling cranes
US6126023A (en) * 1995-11-24 2000-10-03 The University Of Sydney Crane with improved reeving arrangement
WO2005019087A1 (en) * 2003-08-21 2005-03-03 Hyundai Heavy Industries Co., Ltd. Method of lifting heavy item using diagonal tension control unit
US20130126275A1 (en) * 2011-11-17 2013-05-23 Vijay Shilpiekandula Cabling Configuration for Railless Elevators
US10106378B2 (en) * 2015-11-03 2018-10-23 General Electric Company System and method for lifting with load moving machine
US11649142B2 (en) 2019-08-26 2023-05-16 International Business Machines Corporation Crane payload stabilization

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2737285A1 (de) * 1977-08-18 1979-03-01 Nmf Neuenfelder Maschinenfabri Verfahren zum betrieb eines kranes und kran zur ausuebung dieses verfahrens, insbesondere zum verladen von containern durch portalkrane mit drehtraverse
DE2830056C2 (de) * 1978-07-07 1983-07-07 Aktieselskabet Alfred Thomsen, 6600 Askov,Vejen Streueinrichtung, insbesondere zum Aufsetzen auf ein Lastfahrzeug
GB8415934D0 (en) * 1984-06-22 1984-07-25 Handling Consultants Ltd Equipment for handling loads
DE3436737A1 (de) * 1984-10-06 1986-04-10 Max Pietsch KG GmbH & Co, 3014 Laatzen Streueinrichtung mit laufradantrieb
GB2178716B (en) * 1985-07-06 1988-10-26 M B Wild & Company Limited Load handling equipment
DE4325946C2 (de) * 1993-08-02 1998-04-09 Fraunhofer Ges Forschung Dämpfungs- und Positioniereinrichtung zur aktiven Dämpfung der Pendelung von an Kranen aufgehängten Lasten
DE19734116C1 (de) * 1997-08-07 1999-02-18 Schmidt Holding Europ Gmbh Streugerät
DE19838979C1 (de) * 1998-08-27 1999-12-30 Schmidt Holding Europ Gmbh Streugerät

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2164128A (en) * 1938-04-11 1939-06-27 Earl B Spencer Means for suspending and moving a platform or the like
US2190093A (en) * 1939-06-23 1940-02-13 Loew S Inc Suspension system for a camera and light stage
US3179259A (en) * 1963-08-12 1965-04-20 Dravo Corp Snubbing system for cranes
US3276602A (en) * 1964-08-06 1966-10-04 Arthur W Vogeley Cable arrangement for rigid tethering
US3308966A (en) * 1965-09-03 1967-03-14 Joseph E Fawell Travelling stabilized crane
US3375938A (en) * 1966-07-11 1968-04-02 Pacific Coast Eng Co Anti-sway device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2164128A (en) * 1938-04-11 1939-06-27 Earl B Spencer Means for suspending and moving a platform or the like
US2190093A (en) * 1939-06-23 1940-02-13 Loew S Inc Suspension system for a camera and light stage
US3179259A (en) * 1963-08-12 1965-04-20 Dravo Corp Snubbing system for cranes
US3276602A (en) * 1964-08-06 1966-10-04 Arthur W Vogeley Cable arrangement for rigid tethering
US3308966A (en) * 1965-09-03 1967-03-14 Joseph E Fawell Travelling stabilized crane
US3375938A (en) * 1966-07-11 1968-04-02 Pacific Coast Eng Co Anti-sway device

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746182A (en) * 1970-07-08 1973-07-17 H Tax Oscillation damping arrangement for the load carrier of a hoist
US3743107A (en) * 1970-08-04 1973-07-03 J Verschoof Device for preventing a body depending from ropes from swinging
US3837503A (en) * 1971-04-27 1974-09-24 Ishikawajima Harima Heavy Ind Hoisting device for use with cranes
US3828940A (en) * 1971-09-03 1974-08-13 Fruehauf Corp Spreader list, trim and skew adjustment means
US3900114A (en) * 1972-10-07 1975-08-19 Hitachi Ltd Crane apparatus
US3945504A (en) * 1974-03-11 1976-03-23 Fruehauf Corporation Anti-sway system for a spreader suspended from a crane
US3912228A (en) * 1974-05-31 1975-10-14 Ocean Drilling Exploration Integrated chain-wire rope mooring system
US4135628A (en) * 1976-11-12 1979-01-23 Marathon Letourneau Company Hoisting apparatus with improved anti-sway system
US4544070A (en) * 1983-02-16 1985-10-01 Mi-Jack Products, Inc. Sway control arrangement for hoist systems
US4807767A (en) * 1983-12-20 1989-02-28 Grumman Aerospace Corporation Self balancing electric hoist
EP0192446A1 (en) * 1985-02-19 1986-08-27 Marine Travelift, Inc. Suspended load positioning stabilizing system
US5240298A (en) * 1990-08-21 1993-08-31 Teaby Gregory W Load-lifting and orienting apparatus
US5186342A (en) * 1990-11-07 1993-02-16 Paceco Corp. Integrated passive sway arrest system for cargo container handling cranes
US5603598A (en) * 1994-04-11 1997-02-18 Paceco Corp. Guide chute for cargo container handling cranes
US6126023A (en) * 1995-11-24 2000-10-03 The University Of Sydney Crane with improved reeving arrangement
WO2005019087A1 (en) * 2003-08-21 2005-03-03 Hyundai Heavy Industries Co., Ltd. Method of lifting heavy item using diagonal tension control unit
US20130126275A1 (en) * 2011-11-17 2013-05-23 Vijay Shilpiekandula Cabling Configuration for Railless Elevators
US8978831B2 (en) * 2011-11-17 2015-03-17 Mitsubishi Electric Research Laboratories, Inc. Cabling configuration for railless elevators
US10106378B2 (en) * 2015-11-03 2018-10-23 General Electric Company System and method for lifting with load moving machine
US11649142B2 (en) 2019-08-26 2023-05-16 International Business Machines Corporation Crane payload stabilization

Also Published As

Publication number Publication date
FR2009171A1 (xx) 1970-01-30
GB1213106A (en) 1970-11-18
DE1925849A1 (de) 1969-11-27
BE773480Q (fr) 1972-01-31
NL162034B (nl) 1979-11-15
NL6907937A (xx) 1969-11-25
NL162034C (nl) 1980-04-15

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