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Publication numberUS3743107 A
Publication typeGrant
Publication dateJul 3, 1973
Filing dateAug 3, 1971
Priority dateAug 4, 1970
Also published asDE2139070A1
Publication numberUS 3743107 A, US 3743107A, US-A-3743107, US3743107 A, US3743107A
InventorsVerschoof J
Original AssigneeVerschoof J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for preventing a body depending from ropes from swinging
US 3743107 A
Abstract
A device for preventing a rope suspended body from swinging which includes two ropes secured at a distance from each other to the body the swinging of which is to be prevented. A tensioning device is provided for each rope and the wire ropes are arranged at an angle to the vertical and to each other. The tensioning devices keep the respective ropes under tension with a force which is the same for each rope. These devices are connected with each other such that when the tensions in the rope become unequal the tensioning device which is subjected to the comparatively higher load will exert a higher correcting pulling force.
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Description  (OCR text may contain errors)

United States Patent 11 1 Verschoof July 3, 1973 [54] DEVICE FOR PREVENTING A BODY 3,043,444 7/1962 Melton. 212/20 DEPENDING FROM ROPES FROM 3.179.259 4/1965 McLean 212/11 7 SWINGING FOREIGN PATENTS OR APPLICATIONS [76] lnventor: Jelis Verschoof, Voorhoutstraat 1, 742094 9/1968 Canada 254/184 Haarlem, Netherlands [22] Filed; 3, 1971 Primary Exarrzinen-Harvey C. Hornsby Attorney-Eric H. Waters et al. [2]] Appl. No.: 168,539

[57] ABSTRACT [30] Foreign Application Priority Data A 4 1970 Neth d d 7011527 A device for preventing a rope suspended body from e an S swinging which includes two ropes secured at a distance from each other to the body the swinging of if 212/125 gz i gg -which is to be prevented. A tensioning device is proi 125 vided for each rope and the wire ropes are arranged at 1 0 can: 2 an angle to the vertical and to each other. The tensioning devices keep the respective ropes under tension 56 R f d with a force which is the same for each rope. These de- 1 e erences I e vicesare connected with each other such that when the UNITED STATES PATENTS tensions in the rope become unequal the tensioning de- 3,532,324 10/1970 Crittenden 212/14 vice which is subjected to the comparatively higher 3,273,360 9/1966 weisenbachw 254/134 load will exert a higher correcting pulling force. 3,476,263 11/1969 Komatsu 212/14 3,510,107 5/1970 Fidler 254/184 7 Claims, 3 Drawing Figures DEVICE FOR PREVENTING A BODY DEPENDING FROM ROPES FROM SWINGING FIELD OF INVENTION The present invention relates to devices for preventing bodies depending from ropes from swinging.

The invention relates more particularly to a device to prevent a container depending from hoisting ropes from swinging in horizontal direction during loading and unloading of containers or load cases by means of a so-called container bridge, as might occur when a load receives a horizontal acceleration or because wind forces are acting upon the load.

BACKGROUND Due to the increase in transportation with load cases, there is a need to be able to load and unload these cases with greater efficiency. As during loading, the load cases often have to be lowered accurately to a particular place, movements of the cases in horizontal direction cannot be tolerated. However, without the use of a device which prevents these horizontal movements from occurring, accurate location cannot be assured.

SUMMARY OF INVENTION An object of the invention is to provide an effective device which prevents loads from swaying or swinging during loading or unloading.

According to the invention, said object is achieved in that at least two wire ropes are secured at a distance from each other by an engaging means or directly to a body, said wire ropes being passed to a tensioning device, there being a separate such device for each wire rope, at an angle to the vertical and not running parallel to each other. Each said device keeps its wire rope under tension with a certain force which is the same for each rope. The tensioning devices are coupled with each other such that when the tensions in the wire ropes become unequal and, as a consequence thereof, the loads of the tensioning devices become unequal, said tensioning device which is subjected to the comparatively higher load will exert a higher pulling force.

BRIEF DESCRIPTION OF DRAWING The invention will now be explained in more detail with reference to the accompanying drawing in which:

FIG. 1 illustrates diagrammatically, by way of example only, one embodiment of the invention;

FIG. 2 is a block diagram of electrical connections used with the apparatus of FIG. 1; and

FIG. 3 shows a modification of FIG. 2.

DETAILED DESCRIPTION In the drawing is shown a movable trolley 1 of a container bridge, on which trolley a hoisting winch gear 2 is provided. The hoisting ropes 3 extend around sheaves 4 to the fixed points 5. The sheaves 4 are provided on the container yoke 6 which engages the con tainer 7.

In addition, wire ropes 8 are secured to the container yoke 6, and each wire rope extends over the guide sheave 9 to a tensioning drum 10. These tensioning drums l keep the wire ropes or bracing wires 8 under tension during hoisting and lowering of the container 7 with the same force for each wire rope, the tensile forces of course being sufficiently high to prevent slackening of the bracing wires, the resultant of which is less than the weight of the container 7. Furthermore, the tensioning drums 10 are coupled with each other in such a way that with a rotation of one of the drums relative to the other the driving moment of the comparatively heavier loaded tension drum will be increased.

When the load 7 tends to sway to the right because for instance a wind force is acting on the load, the left bracing wire 8 will tend to rotate the appertaining tensioning drum 10 relative to the other tensioning drum. However, this rotation will be counteracted at once by the increase effected therewith of the driving moment of said tensioning drum 10 mentioned first, so that the load 7 is prevented from swaying to the right.

In FIG. 2, the motors driving the drums 10 are indicated at M M.,. G, G are synchro transducers from which signals are fed into the electrical differentials D and so forth. P and the like are control potentiometers. T,, T,, are thyristors controlling the coupling of the motors M M In operation the motors M M are continuously energized so that a pulling force is exerted on the wire ropes 8, and these ropes are kept under tension. If the tension in the ropes becomes unequal or some of the ropes are subjected to a higher load, this causes the electrical differential D to be actuated and a higher coupling to be exerted by the motor concerned.

In FIG. 3, the synchro transducers G, G are replaced by devices K, K measuring the load on the wires 8 and transmitting a signal corresponding to this load to the electrical differentials D. This arrangement permits for an overcompensation of a motor M in order to compensate also for differences in elongation of the wires.

I claim:

'1. A device for the purpose of preventing a rope suspended body from swinging, said device comprising at least two ropes secured at a distance from each other to the body tensioning means for varying the tension in each said rope, said ropes being connected to a respective one of the tensioning means, said ropes being at an angle to the vertical and to each other, said tensioning means operating to maintain the respective ropes under equal tension forces, said tensioning mans being coupled with each other such that, when the tension forces in the ropes become unequal, the tensioning means which is subjected to the comparatively higher load will exert a higher, correcting, pulling force on the associated rope.

2. A device according to claim 1, wherein said tensioning means include respective rope drums adapted for being driven, said rope drums being coupled with each other so that a rotation of one of the drums relative to the other will cause a change in the driving moment of one of the drums.

3. A device according to claim 2 comprising electric means responsive to said change in the driveng moment and by which the drums are coupled with each other so that the drums will act correctively.

4. A device according to claim 1, wherein said ropes cross each other and are connected to respectively opposite sides of said body.

5. A device according to claim I, wherein said ropes are wire ropes.

6. A device according to claim 1 further comprising hoisting ropes connected to the body.

7. A device according to claim 6 comprising a trolley supporting said first two ropes and hoisting ropes.

i I C III

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3043444 *Oct 9, 1958Jul 10, 1962Gen Mills IncControlled motion crane
US3179259 *Aug 12, 1963Apr 20, 1965Dravo CorpSnubbing system for cranes
US3273860 *Mar 4, 1965Sep 20, 1966New York Air Brake CoHydraulic system
US3476263 *Jun 2, 1967Nov 4, 1969Ishikawajima Harima Heavy IndDevice for preventing the swaying of the suspending means in a crane
US3510107 *Jan 11, 1968May 5, 1970United Aircraft CorpMultiple hoist synchronization system
US3532324 *May 23, 1968Oct 6, 1970Paceco IncAntisway mechanism
CA742094A *Sep 6, 1966Commissariat A L'energie AtomiqueHoisting device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3874516 *Sep 14, 1973Apr 1, 1975Ishikawajima Harima Heavy IndDevice for preventing the swaying of the suspending means in a crane
US3904156 *Jul 11, 1974Sep 9, 1975Us ArmyExternal load stabilization apparatus
US3971478 *Oct 10, 1974Jul 27, 1976Institutul de Proiectare Tehnologica Pentru Laminoare --IPROLAM--Overhead crane with lifting beam provided with C-shaped claws
US4227677 *Mar 26, 1979Oct 14, 1980Bernaerts Henry JAnti-sway device for hoists and cranes
US4227679 *Mar 19, 1979Oct 14, 1980Mannesmann Demag A.G. Wolfgang-Reuter-PlatzHoist with two or more hoisting units
US4807767 *Apr 28, 1987Feb 28, 1989Grumman Aerospace CorporationSelf balancing electric hoist
US4842150 *Mar 25, 1988Jun 27, 1989Tepora Transportsysteme Entwicklings-GmbhApparatus for stabilizing the load of a crane or the like
US4883184 *Jun 10, 1988Nov 28, 1989Albus James SCable arrangement and lifting platform for stabilized load lifting
US5358219 *Dec 20, 1991Oct 25, 1994David K. ShenkCrane claw tilt sensing and recovery
US5769250 *Aug 29, 1996Jun 23, 1998Kci Konecranes International CorporationMethod and apparatus for controlling the loading element and load of a crane
US6439407Jul 12, 1999Aug 27, 2002The United States Of America As Represented By The Secretary Of CommerceSystem for stabilizing and controlling a hoisted load
US6533220 *Apr 22, 2002Mar 18, 2003Ecms Aviation Systems GmbhDevice for attaching a load to a helicopter
US6631816 *Jan 10, 2000Oct 14, 2003Ishikawajima-Harima Jukogyo Kabushiki KaishaHoist
US6644486Feb 28, 2002Nov 11, 2003The United States Of America As Represented By The Secretary Of CommerceSystem for stabilizing and controlling a hoisted load
US6758356 *Nov 14, 1996Jul 6, 2004Manitowoc Crane Companies, Inc.Liftcrane with synchronous rope operation
US7267240 *Mar 29, 2005Sep 11, 2007Siemens AktiengesellschaftMethod and device for maintaining a position of a load suspended from a lifting gear
US7581715Jul 20, 2007Sep 1, 2009Atlas Devices, LlcPowered rope ascender and portable rope pulling device
US7934698Feb 26, 2008May 3, 2011Atlas Devices, LlcPowered rope ascender and portable rope pulling device
US9366128May 22, 2013Jun 14, 2016Baker Hughes IncorporatedAutomated wellbore equipment feeding system
US20050224438 *Mar 29, 2005Oct 13, 2005Siemens AktiengesellschaftMethod and device for maintaining a position of a load suspended from a lifting gear
US20070194290 *Feb 27, 2007Aug 23, 2007Atlas Devices LlcDevice to enable rope pulling functionality using a rotational power source
US20080017838 *Jul 20, 2007Jan 24, 2008Atlas Devices, LlcPowered rope ascender and portable rope pulling device
US20080128668 *Nov 9, 2007Jun 5, 2008Atlas Devices LlcMultiple line powered rope ascender and portable hoist
US20080203370 *Feb 26, 2008Aug 28, 2008Atlas Devices, LlcPowered Rope Ascender and Portable Rope Pulling Device
WO1997008094A1 *Aug 29, 1996Mar 6, 1997Kci Konecranes International OyMethod and apparatus for controlling the loading element and load of a crane
Classifications
U.S. Classification212/274, 254/290, 254/275
International ClassificationB66C13/04, B66C13/06
Cooperative ClassificationB66C13/06
European ClassificationB66C13/06
Legal Events
DateCodeEventDescription
Jan 8, 1982AS02Assignment of assignor's interest
Owner name: B.V. MACHINE BOUW CONTAD STORK,
Effective date: 19811221
Owner name: CONRAD STORK BEHEER B.V.
Jan 8, 1982AS01Change of name
Owner name: CONRAD-STORK B.V.
Effective date: 19811228
Owner name: CONRAD-STORK BEHEER B.V.
Jan 8, 1982ASAssignment
Owner name: B.V. MACHINE BOUW CONTAD STORK,
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONRAD STORK BEHEER B.V.;REEL/FRAME:003942/0523
Effective date: 19811221
Owner name: CONRAD-STORK BEHEER B.V.
Free format text: CHANGE OF NAME;ASSIGNOR:CONRAD-STORK B.V.;REEL/FRAME:003942/0520
Effective date: 19811228
Owner name: B.V. MACHINE BOUW CONTAD STORK,, NEW YORK
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CONRAD STORK BEHEER B.V.;REEL/FRAME:003942/0523
Owner name: CONRAD-STORK BEHEER B.V., CALIFORNIA