DESCRIPTION

The present invention relates to a double opening and stackable joint.

In the realization of machines it is known the mechanical "joint" or connection which allows that two stiff pieces move in various directions around a pin which keeps them in strict adherence to each other. At the state of the art, there exist various kinds of joints: the axial, angular and radial ones. Among the joints provided according to the state of the art there are no joints which allow to stack further elements.

The system defined "double opening joint" applied in the automotive logistics field allows to solve the following technical problems:

- the possibility to stack many empty containers in series, thus simplifying the storage and the transport on motor vehicles thereof (fig. 10);

the simple extraction of a container in the discharging step of the same, and the simple loading of the same (fig. 11) .

Therefore, the present invention provides a "joint" made up of two elements, a lower box le and an upper box 9, constrained to each other by a stabilizing plate 4, suitably shaped and interconnected to stabilizing 2 and blocking pins 6.

Therefore, aim of the present invention is that a simple movement and stacking of loads is ensured. These and others innovative features will be clear from the following detailed description, which refers to the following figures 1/10 to 10/10, where :

- fig. 1 shows the assembled constrained device, in 3D;

- fig. 2 shows a 3D image of the stacking of the same with lower sliding;

- fig. 3 shows a 3D image of the stabilizing pin;

- fig. 4 shows a 3D image of the stabilizing plate;

- fig. 5 shows a 3D image of the stabilizing pin;

- fig. 6 shows a cylindrical stabilizing element of the lower sliding in 3D;

- fig. 7 shows a view of the stabilizing conical element of the upper sliding in 3D;

- fig. 8 shows a view of the upper box in 3D;

- fig. 9 shows a 3D image of the whole pin with the box pulled down, and the stacking of another joint on the same;

- fig. 10 shows a 3D image of the whole joint with the upper box pulled down. The double opening and stackable joint comprises a first lower box 1 and a second upper box 9. The lower box 1 is provided with a vertical opening lc and at least two holes la and lb on its surface, apt to be welding filling. In fact, the lower box 1 houses therein a lower sliding element 5 with at least two holes on the surface 5a and 5b and a vertical opening 5c, which coincide perfectly with the holes and the vertical opening 1 a of the lower box 1 (so la with 5a, lb with 5b and lc with 5c) , a stabilizing pin 2 with a vertical opening 2a and a hole 2b. The holes la, 5a, lb, 5b, lc and 5c are apt to fix with welding filling. The stabilizing pin 2 blocks a cylindrical blocking element 3 of the lower box 1 which is provided with a vertical opening 3a; the stabilizing pin 2, the cylindrical blocking element 3 and the lower box 1 are fixed to each other by means of welding filling of holes 3a, lb, 3b and 2b. The stabilizing pin 2 houses in the vertical opening 2a a stabilizing plate 4 and this last one is provided with holes 4a and 4b, an upper shoulder 4c and a lower shoulder 4d; the hole 4b of the stabilizing plate meets the hole 6a of the blocking pin 6, introduced inside the conical cylindrical element 8, and it is blocked from this one. The hole 4b and the hole 6a are stabilized by means of a round bar 11. The blocking pin 6 is housed in an upper sliding element 7 contained in the upper box 9 which is provided in turn with the hole 9a. The blocking pin 6, the upper sliding element 7, the upper box 9 and the conical element

8 are fixed to each other by means of welding filling of the holes 6a, 7a, 8a and 9a. The connection of the cylindrical blocking element 3 to the stabilizing pin 2, and of the blocking element

6 to the conical element 8 determines a central sliding body made up of the blocking pin 6 and the stabilizing pin 2, sliding because the pins 6 and 2 are connected to the stabilizing plate 4 by round bars 11 which go in the holes 4a and 6a and holes

4b and 2b, thus allowing the jointed feature.

The upper box 9 can carry out a rotation through about 180° - 90° inwards and 90° outwards with respect to the lower box 1. The positions of the upper box 9 are determined by the rotation of the stabilizing plate 4, in the stacking position (fig.

10) the user carries out a rotation through about

90° inwards of the wall which can be pulled down, thus allowing the stabilizing plate to go down along the vertical opening 3a of the lower box 1, thus preparing the condition of stacking many containers in series and the transport of the same on motor vehicles in piece extraction/removal position (fig. 11) . In the 90° outwards position, the user puts the wall which can be pulled down outside the container by making the stabilizing plate 4 abut on the lower box 1, thus allowing the extraction or introduction of the piece inside the basic container.