This invention relates to a device for lashing a load, compris¬ ing a hose substantially nonductile in its longitudinal direct¬ ion.

For safety reasons, loads transported on open trucks must be secured by suitable means.

When the load consists of timber, insulation material bales etc. , the safety means are simple lashing members in the form of chains, ropes, wires, saddle-girths and suitable tightening devices .

The greatest disadvantage of the known devices is a friction force arising between the lashing means and the load when the lashing means are tightened by "hauling in" their free end. Said friction force increases with the contact pressure of the lashing means against the load. As a consequence thereof, the lashing means is not stretched uniformly along its entire length, but its stretching is strongest in the end zone where the hauling-in takes place. The load, thus, is more forcefully compressed at the hauling-in end, which may result in both damages and in obliquity of the load.

A. further disadvantage also originating from the non-uniform tension in the load, lashing, especially when the load consists, of mineral wool bales for building insulation, is that a rope used for lashing may cut like s saw into the load and damage »the same.

The present invention has the object to produce a device for load lashing by which the load is subjected to a uniformly distributed contact pressure along the entire lashing length. This object is achieved by a device, which comprises a hose, which is not ductile in longitudinal direction, and which is closed at its ends and provided with suitably spaced constrict¬ ions , whereby a plurality of communicating chambers are formed? and which hose, includes means for the supply and removal of pressure medium.

The Laid-Out Document SE 7407775-1,-it is true, discloses the teaching of using a "one-cell." hose as a power means with limited stroke. It further is disclosed in FR-PS 951 S l, tha a plurality of such cells can be connected in series for establishing a greater stroke. Apparently it has not been ob¬ vious to utilize the effect of that the contraction in length is distributed uniformly along the entire hose length consist ing of cells communicating through the constriction.

An embodiment of the invention is described in the following, with reference to the accompanying drawing, in which Fig. 1 shows the hose according to the invention in pressur less state, Fig. 2 shows the hose according to the invention in pressur ized state, and Fig. 3 shows the hose according to the invention applied to "load lashing, the left-hand half of the load enclose by a preεsureless hose, and the other load half encl ed by a pressurized hose.

The pressureless hose 1 shown in Fig. i preferably is reinfor and not ductile in its longitudinal direction. The hose 1 poss ibly may be coated with an outer layer of wear-resistant mate ial.

At a constant c/c-distance along the hose 1, constrictions 2 are provided, the diameter of which slightly exceeds the diame er of the hose in pressureless state.

Upon pressurizing the hose 1, as shown in Fig. 2, a plurality of cells or chambers 3 communicating with each other are forme

From Fig. 2 is apparent that upon pressurization of the hose 1 by connecting it to a pressure source, which may contain air o gas under pressure or a suitable hydraulic medium, the length the hose 1 is shortened. This, of course, is due to the fact that the nonductile generatrix of the hose 1 which in pressure less state is straight, describes a series of arcs when the ho is pressurized.

Fig. 3 shows in a schematic manner, how the hose 1 according to the invention is used for lashing a load 4 on a truck platform 5.

In the left-hand half of Fig. 3 the hose 1 is shown in pressure¬ less state, and in the right-hand half the hose is shown press¬ urized. . Fig. 3 also shows how the load 4 is subjected to a uniformly distributed contact pressure (the load is "embraced") by the pressurized hose 1.

A load lashing of the aforesaid kind eliminates entirely the aforementioned sawing effect on the load, because no sliding motion takes place between the load 4 and the hose 1 when the latter is being pressurized.

The above description refers only to a basic embodiment and does not restrict the scope of the invention idea. At times an espec¬ ially favourable effect can be obtained by a hose, in which the reinforcement pattern has been designed so as to yield maximum length contraction. The constrictions further may be brought about by external members, such as lash cords, hose clips or rings threaded onto the hose, without abandoning the idea of the invention.

The invention may also in other respects be varied freely within the scooe of the attached claims.

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