Securing device for a component that can be secured on rails of a floor structure of an aircraft interior, wherein - at least two adapter plates are provided which are decoupled from one another and can be secured on the rails , on which plates the component having mutually spaced securing attachments can be secured, wherein - each of the adapter plates can be secured on two different rails , - each adapter plate being mounted on one of the rails at a first mounting point (B1, D1) and on the other rail at two second mounting points (A1, A2, C1, C2) during installation, so that - the adapter plates are held in place on the rails at three mounting points when installed, and - the adapter plates are mounted on the rails so as to be slidable at the first mounting points (B1, D1), wherein - ball-and-socket joints are in each connection between the adapter parts and the rails , and - each ball-and-socket joint is formed by a dimensionally stable ball and a dimensionally stable ball socket , wherein - each dimensionally stable ball socket being formed by two dimensionally stable ball socket halves , wherein - the balls of the ball-and-socket joints are associated with the rails and the ball sockets are associated with the adapter plates , wherein - the two ball socket halves of a ball-and-socket joint are respectively arranged on a support plate and, in an assembled position, the two halves complement each other to form the ball socket and comprise at least one securing attachment , and - the two support plates in the assembled position are each connected by means of a tongue and groove joint to an adapter plate when assembled, wherein - the tongue and groove joint being oriented transversely, preferably perpendicularly, to the rails to which the relevant adapter plate is secured. - at least two adapter plates are provided which are decoupled from one another and can be secured on the rails , on which plates the component having mutually spaced securing attachments can be secured, wherein - each of the adapter plates can be secured on two different rails , - each adapter plate being mounted on one of the rails at a first mounting point (B1, D1) and on the other rail at two second mounting points (A1, A2, C1, C2) during installation, so that - the adapter plates are held in place on the rails at three mounting points when installed, and - the adapter plates are mounted on the rails so as to be slidable at the first mounting points (B1, D1), wherein - ball-and-socket joints are in each connection between the adapter parts and the rails , and - each ball-and-socket joint is formed by a dimensionally stable ball and a dimensionally stable ball socket , wherein - each dimensionally stable ball socket being formed by two dimensionally stable ball socket halves , wherein - the balls of the ball-and-socket joints are associated with the rails and the ball sockets are associated with the adapter plates , wherein - the two ball socket halves of a ball-and-socket joint are respectively arranged on a support plate and, in an assembled position, the two halves complement each other to form the ball socket and comprise at least one securing attachment , and - the two support plates in the assembled position are each connected by means of a tongue and groove joint to an adapter plate when assembled, wherein - the tongue and groove joint being oriented transversely, preferably perpendicularly, to the rails to which the relevant adapter plate is secured. <EOS>