Patent ID: 8777201

Claim:
A device for assisting with the working of mechanical parts, comprising: a flange having at least two parts joined together with the ability to move relative to one another in a common plane, up to a closed position of the flange in which the parts are joined together; a locking device that can be actuated in the closed position of the flange to bring said parts into mutual abutment; at least two rails; a set of resilient supports connecting each rail to at least one respective part of the flange with limited scope for relative movement; wherein adjacent end faces of the at least two rails have mating surfaces forming a connection by positive locking, said connection being active in the vicinity of the closed position; wherein each connection is arranged so as to guide the adjacent end faces relative to one another in a movement relative to said parts, to a working position in which the rails form a guide path for one or more tools, and in order to help keep these rails in mutual abutment, in said working position, when the locking device is actuated, wherein each rail has one or more guide surfaces and the connection comprises an arrangement adapted to ensure continuity of said guide surfaces in the working position, and wherein said arrangement comprises at least one tongue projecting from an end face of a rail and a groove provided in the adjacent end face of a neighboring rail, the tongue and the groove both being of the appropriate dimensions to fit into one another close to the position of closure of the flange.