Freight accommodation on freight carrier – Load lashing retainer or load lashing adjunct – Wraparound
Patent
1997-10-06
2000-04-11
Gordon, Stephen T.
Freight accommodation on freight carrier
Load lashing retainer or load lashing adjunct
Wraparound
410 96, 410 97, 267153, B60P 708
Patent
active
060481455
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement of securing elements for regulating tension forces in the elements.
The present invention is especially concerned with securing arrangements which are employed for securing freight, such as containers and the like to a base such as a loading area on a vehicle, the deck on a vessel or the like. In such cases, the securing arrangement generally comprises a chain linkage consisting of a number of rings of dissimilar construction. Such a chain linkage is fastened to the freight and to the base and is tightened in order to prevent the freight from moving, for example at bumps in the road or when the vessel swings in heavy seas. Even if the chain linkages are lashed tightly tension forces occur when the base moves, and this will result in strong tugs on the chain linkage, and each link will gradually become more and more stretched and deformed until possible breakage occurs. For this reason such chain linkages must often be replaced.
Many devices with springs and elastic elements are known which dampen such tugging actions by compression parallel to the tugging action.
U.S. Pat. No. 4,757,979 describes a tension regulating apparatus for regulating tension by the compression of a yieldingly resisting core. As described, a collapsible modifier is arranged in a compressible core and reacts when a force transmitting member applies a compression force to the core when reacting to an applied tension force. In particular, the collapsible modifier is described as a compression-modifying link mechanism 18 in the form of a parallelogram, together with a compression means 16. The compression means 16 is connected to connecting links 12,13 and surrounds the core 14. When the links 12, 13 are exposed to tugs the compression means links 16 on each side of the core tend to compress or collapse the compressible core 14 with the built-in link mechanism 18. This means that the links 16 move towards each other and make possible an accompanying small lengthening of the link in the longitudinal direction. The core material 14 counteracts the compression together with the link mechanism. Thereby the tugging action in the links is dampened, and the wear and tear over time becomes much less.
The disadvantage with this known construction is that there is a big danger of wear and tear on the rubber material when the link mechanism moves inside the core. It is therefore doubtful whether this solution will have satisfactory durability over longer periods.
It is an object of the present invention to produce an arrangement which will completely or partially eliminate tug damage on a chain linkage.
Briefly, the invention provides an arrangement for damping tugs in a securing element wherein the arrangement includes a solid elastic block having a pair of longitudinally extending bores, a pair of linkage sections, each of which extends longitudinally through a respective bore in the block and a pair of fastening rings. Each ring is fastened to a respective end of each pair of linkage sections to transmit a pulling force to the pair of linkage sections and to direct the respective ends of the linkage sections toward each other. In this respect, the linkage sections move toward each other within the block to resiliently compress the block therebetween in response to pulling of the rings in a direction away from each other.
The arrangement according to the invention is used for coupling together bodies which can be mutually moved, for securing freight to loading areas on vehicles and on board vessels, for moorings, tows, and during the coupling together of ponds at sea.
The invention is to be described further in the following description having regard to a concrete example, and with reference to the accompanying drawings, in which:
FIG. 1 shows a perspective view of a container which is to be secured to a movable base by means of the arrangement according to the invention.
FIG. 2 shows a perspective view of the arrangement according to the invention.
FIG. 3 shows a vertical section of the arrangemen
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