TECHNICAL FIELD This invention concerns a cargo container as well as a roll-off container platform or holder, for heavy vehicle as lorry, methods for producing both a cargo container and the transport system including cargo container.

BACKGROUND ART There are many different types of cargo containers for transporting heavy goods. Examples of a cargo container are a roll-off container, wagon-bridge, scrap holder or a container. A cargo container among other things comprises load shutters on the sides and/or at the very back to facilitate horizontal loading and unloading. Container can be covered and contain load doors, for instance.

Another frequent type of cargo container intended for heavy bulk goods, as scrap, is a roll-off container, open at the top with load shutters at one end. Roll-off container can be covered with a net or a cover during transport. Such type of roll-off container is usually supposed to be lifted up or drawn upon a heavy vehicle by a platform for a roll-off container. Alternative terms for platform for a roll-off container are, for example roll-on/roll-off container platform and roll-on/roll-off container attachment. Roll on/roll-off container platform is a common description of a platform for a roll-off container for a HGV (Heavy Goods Vehicle) , and roll-on/roll-off container attachment is a common term for platform for a roll-off container for trailer. A heavy vehicle is considered i.e. lorry, articulated lorry, dumper or railway-carriage. Platform for a roll- off container comprises a hook or a clutch which fastens at the front of the turnable roll-off container. Mounting itself is generally done inside a crosswise tubular fastening device, slightly curved and welded into two beams. Such fastening device is often known as starting loop. Turnable roll-off container usually comprises a pair of wheels or some other type of rolling devices situated underneath and at the far back of the turnable roll-off container. This is to allow the back part of the turnable roll-off container scroll on the ground during loading. The turnable roll-off container is usually loaded with bulk goods, as scrap, intended for transportation. During unloading the common unloading method is by opening the load shutters, discharging the load by a lorry tipper. The above mentioned turnable roll-off container is of a heavy-duty construction which usually has two longitudinal strong beams underneath, curved on the front of the turnable roll-off container. Several less powerful beams are vertically placed at regular intervals along the longitudinal sides of the turnable roll-off container. Beams are commonly 4-8 in number. An alternative name for such beam is rib. The inside of the turnable roll-off container is covered with sheet metal. There is a plurality of minor beams underneath the turnable roll-off container placed closest to the bottom plate directing from one long side to the other long side, those above mentioned longitudinal strong beams are attached to the minor beams. Upper part of a turnable roll-off container ending towards the opening is typically reinforced, for example with a beam or a bar pin. A turnable roll-off container intended for loading and transporting of scrap is exposed to heavy strains due to strokes and sharp objects that hit against the sheet metal during loading and unloading. An example of objects that are transported is sheet metal weighting hundreds of kilograms. Fully loaded turnable roll-off container can have a gross vehicle weight of 20 tons.

When transporting heavy bulk goods, as scrap, to a certain facility, it is necessary for the carrier to be able to transport different types of goods to the opposite direction. The problem the above mentioned type of turnable roll-off container faces is that it is difficult to efficiently load on different types of cargo. It is impracticable to load long piece goods as long steel ingot or timber. Long piece goods are considered those piece goods longer than 2.6 metres. A fork-lift truck is usually used for this purpose. A fork-lift truck is considered to be more efficient for loading purpose than a crane or an overhead travelling crane. Nevertheless a fork-lift truck cannot load on the above mentioned type of turnable roll-off container because its sides are closed and it is open only aloft and at the back. There are certainly load shutters at the back but in reality it is not possible to efficiently load shapes which are longer than the short side and with a considerable weight, in this type of a turnable roll- off container.

There are specific problems in the transport system when scrap collecting/delivery is carried out repeatedly from a certain initial point to a certain destination. The greater number of heavy vehicles returning unloaded the less effective the transport system. The greater number of heavy vehicles returning unloaded the higher pollution load which among other things is caused by carbon dioxide emission from unloaded heavy vehicles. That is to say that different heavy vehicles transport the long piece goods instead of those returning unloaded after having the scrap transported. There are so called return cargo roll-off containers, also known as return cargo containers. Those can transport for example wood-chips or grain in one direction and pallet goods in the opposite direction. Their shape is similar to the shape of roll-off container and the only difference is that the sides are partly or completely openable which allows a fork-lift truck load long piece goods. The sides can be opened by openable or foldable doors. Remaining problem facing this type of roll-off container is that it is not suitable and not applicable to load or transport heavy and bulky goods as recycling material or scrap. The sides on such container lack strength and durability required to repeatedly load scrap, for example by a harbour crane.

SUMMARY OF THE INVENTION The present invention aims to solve the above problems and other similar problems. The object of this invention is to present a cargo container intended for transport of long piece goods on a vehicle, which contains a platform for a roll-off container, as a supplement to the traditional transport of scrap. Further characteristics of the invention are described in the enclosed claims.

According to this invention a cargo container is intended for transport of goods on a heavy vehicle, and comprises a covered front side, the first longitudinal side provided with two rolling devices, the side is further provided with two longitudinal beams, the side is intended as bottom of the cargo container when transporting scrap, wherein the opening of the cargo container while transporting scrap is intended to be in upwards position the second and the third longitudinal non openable covered side, characterized by that the cargo container is turnable and comprises two rolling devices on the second of the longitudinal sides, the cargo container comprises furthermore two longitudinal beams on the second of the longitudinal sides which allows the second longitudinal side to be intended as a bottom of cargo container while transporting piece goods, wherein the opening of cargo container is meant to be in sideways position while loading and transporting long piece goods. The advantage of the present invention is that in this one and the same cargo container it is possible to transport scrap in one direction and long piece goods in the opposite direction.

An additional aim with this invention is to enable a transport system comprising of a plurality of cargo containers and a plurality of vehicles.

Another advantage of the present invention is a more cost-effective transport system, at the same time reducing the total quantity of carbon dioxide emission including both scrap transport and piece goods transport.

BRIEF DESCRIPTION OF THE FIGURES The invention is closely described while referring to the attached figures where, Figure 1 shows an overview of a goods container according to the invention resting on its first side.

Figure 2 is an overview of a goods container without back shutters being assembled.

Figure 3 shows an example of a goods container resting on its second side and with the opening pointing sideways.

Figure 4 shows an example of a frame structure for a cargo container.

Figure 5 and figure 6 show schematically a figure of a bevel and a rounding between the cargo containers' s first and the second longitudinal side.

DETAILED DESCRIPTION OF THE INVENTION The first figure is an overview of a turnable cargo container 4 according to the invention. On the first figure the cargo container 4 rests on its first longitudinal side 1. In that position it is ready for loading of scrap. In an embodiment the first longitudinal side 1 comprises two longitudinal beams 7a, 7b and two rolling devices 10a, 10b. In the figure 1 it is even shown the cargo container's 4 second longitudinal side 2 comprising two longitudinal beams 8a, 8b and two rolling devices 9a, 9b.

An imaginary centre line z, indicated in figure 1, passes between the first side's 1 two longitudinal beams 7a, 7b. The distance between this centre line z to the upper part of the third longitudinal side 3 indicated as x in figure 1. The distance, from the imaginary centre line z to the second longitudinal side 2, indicated as y in figure 1. In an embodiment the distance x is longer than the distance y. In this way it differs from roll-off container constructed in accordance with known technology where the corresponding distances are of equal length. The distance x in the roll-off container according to this invention is longer than the distance y for two main reasons. One reason is that the third 3 longitudinal side is lighter than the longitudinal side 2 thus the centre of gravity reduces displacement when the distance x is longer than y, this comparing to as if distances were mainly the same. The other reason is that the total external overall width of the cargo container should meet laws and regulations for vehicular traffic that apply in the state the transport is carried out. The longitudinal beams 8a, 8b are typically at least 8 cm high and outside this the rolling elements 9a, 9b typically stick out.

The longitudinal side 2 in the figure 1, and in the rest of the figures, could have been drawn on the opposite side. That is to say that it is possible, in an embodiment, comparing to figure 1, for the second longitudinal side 2 and the third longitudinal side 3 to change places .

Figure 1 shows an operative form with openable shutters at the back side 6. The main application of the openable shutters at the back side 6 is to allow, during unloading, by vehicle's tipping gear device, tipping out the scrap through the back side 6. The openable shutter locking device comprises two functions. One function is to keep shutters closed when the cargo container rests on its first longitudinal side 1. The other function is to keep the shutters closed when the cargo container 4 rests on its second longitudinal side 2. One example of a locking device is a wagon-bridge lock.

The first 1, the second 2 and the third 3 longitudinal side is not openable . Comparing to a roll-off container with openable longitudinal sides, the cargo container 4 is more stroke resistant during scrap loading. There is a great risk that the openable longitudinal sides on known roll-off containers cannot open once the scrap has been loaded. Furthermore, it is possible to load the cargo container 4 with considerable more scrap and still pull the loaded cargo container on, for example, a vehicle, all this in comparison with the roll-off container with openable sides. While the roll-off container is being pulled on a vehicle by a load hook the longitudinal sides are affected by buckling load. The buckling load is greatest when the lower part of the roll-off container lifts from the ground. Cargo container 4 has higher tolerance against buckling load while changing cargo than the roll-off container with opeanble sides.

Figure 2 shows cargo container where two rolling devices 10a, 10b are fixed to cargo container's 4 first side 1. The function of rolling devices is to allow the back part of the cargo container scroll on the ground during changing cargo. This occurs whilst the load hook of the vehicle is being attached to the securing pin 12, lifting and pulling the front part of the cargo container 4. The rolling devices 9a, 9b, 10a, 10b can be designed as wheels or a plurality of wheels. Additional option of rolling device is slide bar. Another option of a rolling device is lifter comprising a relatively solid polymer. The rolling device is typically attached at the very back on the cargo container near the each of the longitudinal sides .

Apart from the above mentioned, figure 1 shows that the beams 8a, 8b on the cargo container's second side 2 follow the side length. One function of those solid rails 2a, 3a and 5a is to protect the underlying sheet metal from strokes caused by scrap while loading, for example by a harbour crane. The securing pin 12 mounted on the front side 5 comprises a curved bar or a curved pipe, alternatively a plurality of short cylindrical sections joined in a curved shape. Figure 1 shows that the securing pin 12 is mounted at minimum three fixed points. One of those fixed points is typically a bracing means 12b, mainly attached in the middle of the securing pin 12. An example of bracing means is a sheet metal or a bar. Another name for a securing pin is a pulling loop.

A cargo container 4 according to the invention is turnable. By turnable means that it can be turned from resting on its first longitudinal side 1 to resting on its second longitudinal side 2. One method to turn the cargo container is by attaching a chain to the lower part of the first longitudinal side 1 of the cargo container and attaching the same chain to the load hook, used in order to turn the cargo container. Another method to turn the cargo container is to attach a load hook to one of the sides and then turn the cargo container 4. A further method is by using a lorry for this purpose. The cargo container 4 should be empty when turning. Figure 1 shows an example of cargo container 4 which has an inside length of more than 4000 mm. Typical length is 6000 mm in order to exploit the existing roll-off unit efficiently. The inside width while the cargo container rests on its first side 1 is minimum over 1500 mm normally over 2100 mm. The inside width while the cargo container rests on its second side 2 is minimum over 1500 mm and typically over 2100 mm. In an embodiment rolling devices have determined position depending on the rolling device's tracks on the platform for a roll-off container. Position can differ from state to state depending on standards for platform for a roll-off container applied in the particular state the transport system intends to be used. In an embodiment, the minimal width of side 1 and side 2 depends on the standard measure of the outer distance between tracks for rolling devices in platform for a roll-off container. The minimal measure is normally the above mentioned standard measure minus additional 20 cm. Cargo container 4 according to the invention is made of a robust construction. The two beams on the first 1 and on the second side 2 are mainly made of steel. Sheet metal in the cargo container' s 4 first side 1 should be at least 4 mm thick. Sheet-metal on the remaining sides should be at least 3 mm thick. A suitable sheet-metal quality is SS 1312. A fitting sheet-metal product is Hardox.

In an embodiment the frame of the cargo container is schematically shown on figure 4, constructed as two frames . Some optional terms for this frame type are supporting frames, beams and the lower part of the platform for a roll-off container's frame. The first longitudinal side's two beams 7a, 7b and the other side's two beams 8a, 8b form structural elements and those structural frames are arranged in a 90 degree angle, in a relation to the plane of each of the frames. The beam pairs 7a, 7b meant for the first longitudinal side's frame are joined together by one or more cross bars 16. The beam pairs 8a, 8b meant for the second longitudinal side's frame are joined together by one or more cross bars. The front end of the supporting beams 7a, 7b in the first longitudinal side's 1 frame are joined together with the front end of the supporting beams 8a, 8b in the second longitudinal side's 2 frame, with supporting beams 20, 21, 22, 23, arranged perpendicularly to one another, connecting to the front end of the longitudinal beams 7a, 7b, 8a, 8b. Figure 4 shows furthermore that in the above mentioned an embodiment, the inner beam 7a of the frame in the first longitudinal side 1 is joined together with an angled beam 21, in a mainly 90 degree angle. The inner beam 8a of the frame in the second longitudinal side 2 is joined together with an angled beam 22, in a mainly 90 degree angle .

Rearmost on each longitudinal side 1, 2 a transversal beam 18, 19 is situated. Those transversal beams 18, 19 situated at the very back are considerably longer than the previously mentioned transversal beams 16, 17. There is typically a corresponding rolling device 10a, 10b situated on the transversal beam 18 for the first longitudinal side 1. There is typically a corresponding rolling device 9a, 9b situated on the transversal beam 19 for the second longitudinal side 2. When producing a cargo container it is appropriate to produce the frames first.

In an embodiment the cargo container's first longitudinal side 1 comprises a plurality of fastening devices 14 intended for elements 15. The fastening devices are intended for securing the elements preventing the long piece goods from gliding out of cargo container 4 during transporting while the cargo container rests on the second longitudinal side 2. An example of a cargo security element is a pole or a log.

In an additional embodiment the outer edge between the first longitudinal side 1 and the second longitudinal side 2 is bevelled, alternatively rounded. In such an embodiment at least two positions are bevelled or rounded. An example of bevelling is shown on figure 5. An example of rounding is shown on figure 6. The purpose of bevelling respectively rounding is to reduce the risk of leaving traces on the ground, for instance in the asphalt, at the very moment of turning the cargo container.

Usage area of a cargo container 4 according to the invention is not restricted to scrap loading with the opening in the upwards position. Other kinds of bulk goods can be loaded in such type of cargo container with the opening directing upwards, such as wood-chips or other forest goods. While loading a cargo container 4 with sideways opening it is possible to load for example, long piece goods such as timber or steel elements.

This invention is not restricted to the above mentioned embodiments but can vary within the scope of the claims taking in account descriptions and figures .