Joint of floor panels

A joint of floor panels (1, 1′), including a floor panel and an adjacent floor panel, wherein each of the floor panels (1, 1′) to be joined is in a form of a rectangular plate, comprising

• an upper surface (6) and a lower surface (25) parallel to the upper surface (6), intended to be laid on a substrate,
• two long edges (2, 2′) of side surfaces (3, 3′),
• two short edges (4, 4′) of side surfaces (5, 5′),
• a first vertical retaining assembly (10, 37) for the floor panels (1, 1′) to be joined, in a form of an elastic insert (21) placed between the floor panels (1, 1′) to be joined,
• a longitudinal coupling element (7, 8) shaped below one of the long edges (2) of the side surface (3),
• wherein the longitudinal coupling element (7, 8) is parallel to the upper surface (6) and extends horizontally beyond the upper surface (6),
• and furthermore, the longitudinal coupling element (7, 8) has a settling recess (12, 39) that couples with a downwardly extending projection (13, 40) of the adjacent floor panel (1′) and forms with the adjacent floor panel a horizontal retaining assembly (9, 36) of the floor panels (1, 1′) to be joined,
• wherein the longitudinal coupling element (7, 8) has a bearing surface (26, 46) at the end of longitudinal coupling element (7, 8), wherein the bearing surface (26, 46) is remote from a bearing surface (18, 42) of the adjacent floor panel (1′),
• and furthermore, a bearing projection (27, 47) is placed between the bearing surfaces (26, 46;
• 18, 42) and forms a second vertical retaining assembly (10′, 37′), and defines a lower expansion joint (29, 29′),
• wherein the floor panel (1) is joined by the respective long edge (2, 2′) to the short edge (4, 4′) of the adjacent floor panel (1′) by means of
• the first vertical retaining assembly (10, 37) in the form of an elastic insert (21), placed via sliding in a guiding groove (22) between the floor panels (1, 1′) to be joined and extending from the side surface (5, 5′) below the short edge (4)
• and by means of
• a second vertical retaining assembly (10′, 37′), placed below the first vertical retaining assembly (10, 37), in a form of a bearing protrusion (27, 47) extending from the bearing surface (26, 46), where bearing surface (27, 47) is positioned partially in a groove (28, 48) formed in the bearing surface (18, 42) of the adjacent floor panel (1′), the bearing protrusion (27, 47) being an integral part of the floor panel (1) and having a height (30, 30′) greater than the size of the lower dilatation gap (29, 29′),
• and furthermore, the longitudinal coupling element (7, 8) has an upwardly extending vertical projection (11, 38) placed in a settling seat (16, 41) below the guiding groove (22) of the elastic insert (21).