Collapsible freight container

1. A collapsible freight container comprising a floor panel, a roof panel as well as two longitudinal side walls connected to the floor panel and the roof panel, each longitudinal side wall comprising a first and a second part, which are connected by means of at least one hinged joint, such that the first part can hinge towards the second part of the same longitudinal side wall about a hinge axis extending in the longitudinal direction of the freight container, wherein each corner of the freight container is provided with at least one corner pin, which corner pins can be moved simultaneously, using an unlocking mechanism located on the roof panel, from a locked position, in which the longitudinal side walls are rigidly connected to the roof panel and the floor panel of the freight container by means of said corner pins, to an unlocked position, in which the longitudinal side walls are hinged to the roof panel and the floor panel of the freight container.

2. A freight container according to claim 1 , wherein one of the side walls includes a sectional door, which can be moved from a position in which it extends substantially transversely to the roof panel in the closed position of the freight container to a position in which it extends substantially parallel to the roof panel in the open position of the freight container.

3. A freight container according to claim 1 , wherein the unlocking mechanism is provided with a folding arm for folding the freight container to the collapsed position, which folding arm is pivot-mounted to the roof panel of the freight container and which, by pivoting through a predetermined acute angle, can move the corner pins from the locked position to the unlocked position.

4. A freight container according to claim 3 , wherein the folding arm is connected via connecting means to at least the upper corner pins that connect the roof panel to the longitudinal side walls, which upper corner pins can be pivoted by means of the folding arm from the position they take up in the locked position to a folding position, in which folding position the freight container is at least partially collapsed.

5. A freight container according to claim 1 , wherein the freight container is furthermore provided with an extension arm on the roof panel of the freight container, which extension arm is connected at least to the upper corner pins via connecting means, which upper corner pins connect the roof panel to the longitudinal side walls, whilst the upper corner pins can be pivoted by means of the extension arm from a folding position, in which folding position the freight container is at least partially collapsed, to the locked position.

6. A freight container according to claim 3 , wherein the folding arm or an extension arm disposed on the roof panel can be engaged by means of a lifting mechanism, for example a hook of a fork-lift truck or a crane.

7. A freight container according to claim 1 , wherein the unlocking mechanism is provided with locking pawls which are movable against spring force for locking the corner pins, which pawls can be moved against said spring force for unlocking the corner pins.

8. A freight container according to claim 1 , wherein the freight container is made of a composite material.

9. A freight container according to claim 2 , wherein the unlocking mechanism is provided with a folding arm for folding the freight container to the collapsed position, which folding arm is pivot-mounted to the roof panel of the freight container and which, by pivoting through a predetermined acute angle, can move the corner pins from the locked position to the unlocked position.

10. A freight container according to claim 2 , wherein the freight container is furthermore provided with an extension arm on the roof panel of the freight container, which extension arm is connected at least to the upper corner pins via connecting means, which upper corner pins connect the roof panel to the longitudinal side walls, whilst the upper corner pins can be pivoted by means of the extension arm from a folding position, in which folding position the freight container is at least partially collapsed, to the locked position.

11. A freight container according to claim 3 , wherein the freight container is furthermore provided with an extension arm on the roof panel of the freight container, which extension arm is connected at least to the upper corner pins via connecting means, which upper corner pins connect the roof panel to the longitudinal side walls, whilst the upper corner pins can be pivoted by means of the extension arm from a folding position, in which folding position the freight container is at least partially collapsed, to the locked position.

12. A freight container according to claim 4 , wherein the freight container is furthermore provided with an extension arm on the roof panel of the freight container, which extension arm is connected at least to the upper corner pins via connecting means, which upper corner pins connect the roof panel to the longitudinal side walls, whilst the upper corner pins can be pivoted by means of the extension arm from a folding position, in which folding position the freight container is at least partially collapsed, to the locked position.

13. A freight container according to claim 4 , wherein the folding arm or an extension arm disposed on the roof panel can be engaged by means of a lifting mechanism.

14. A freight container according to claim 5 , wherein a folding arm or the extension arm disposed on the roof panel can be engaged by means of a lifting mechanism.

15. A freight container according to claim 2 , wherein the unlocking mechanism is provided with locking pawls which are movable against spring force for locking the corner pins, which pawls can be moved against said spring force for unlocking the corner pins.

16. A freight container according to claim 3 , wherein the unlocking mechanism is provided with locking pawls which are movable against spring force for locking the corner pins, which pawls can be moved against said spring force for unlocking the corner pins.

17. A freight container according to claim 4 , wherein the unlocking mechanism is provided with locking pawls which are movable against spring force for locking the corner pins, which pawls can be moved against said spring force for unlocking the corner pins.

18. A freight container according to claim 5 , wherein the unlocking mechanism is provided with locking pawls which are movable against spring force for locking the corner pins, which pawls can be moved against said spring force for unlocking the corner pins.

19. A freight container according to claim 6 , wherein the unlocking mechanism is provided with locking pawls which are movable against spring force for locking the corner pins, which pawls can be moved against said spring force for unlocking the corner pins.

20. A collapsible freight container comprising a floor panel, a roof panel as well as two longitudinal side walls connected to the floor panel and the roof panel, each longitudinal side wall comprising a first and a second part, which are connected by at least one hinged joint, such that the first part can hinge towards the second part of the same longitudinal side wall about a hinge axis extending in the longitudinal direction of the freight container, wherein each corner of the freight container is provided with at least one corner pin, which corner pins can be moved simultaneously, using an unlocking mechanism centrally located on the container, from a locked position, in which the longitudinal side walls are rigidly connected to the roof panel and the floor panel of the freight container said corner pins, to an unlocked position, in which the longitudinal side walls are hinged to the roof panel and the floor panel of the freight container.