Protection grid for hatch

An offset ballistic protection device (101) protecting a wall (100) provided with a hatch (200), wherein said device (101) comprises:

• at least a first grid (1) offset with respect to the wall (100) and connected thereto, wherein the first grid (1) comprises a first series of bars (1a) parallel to each other, wherein a first end of the first series of bars (1a) is in the vicinity of a hinge (300) of the hatch (200), wherein the first series of bars (1a) is substantially perpendicular to the pivot axis (400) of the hinge (300),
• a second grid (2) offset with respect to the hatch (200) and connected thereto, wherein the second grid (2) comprises a second series of bars (2a) substantially parallel to the first series of bars (1a), wherein the second grid (2) is positioned with respect to the first grid (1) so that the bars (2a) of the second grid (2) are spatially offset in the plane of the second grid (2) with respect to the bars (1a) of the first grid, wherein the bars (2a) of the second grid (2) are therefore able to pass between the bars (1a) of the first grid (1) during pivoting of the hatch (200).