Spring holding cone for holding a spring end of a spiral torsion spring

摘要

A spring holding cone (1) for a spring end of a spiral torsion spring (13), especially a sectional door spring for an industrial door or a garage sectional door, has an outside surface (2) for supporting the spring end of the torsion spring (13) at its inside diameter and fixing means for fixing the spring end to the spring holding cone (1) in a torque resistant way. The fixing means comprise a flank (5) which protrudes from the outside surface (2) and engages between the first spring turn (12) and the second spring turn of the torsion spring (13) at the spring end. The flank (5) extends over less than 180° of the circumference of the outside surface (2); and a securing element (6) extends over a flank-free area of the outside surface (2). The securing element (6) has a recess for holding a torque transfer leg (14) projecting in a radial direction from the torsion spring (13); and the recess is limited in at least one tangential direction around the circumference of the outside surface (2) by a stopping face for the torque transfer leg (14).