System for fixing a rail and adapter piece for such a system

Abstract

A system for fixing a rail onto a foundation comprises a spring element, which can be clamped against a foundation by means of a clamping element, with at least one spring arm and an adapter piece. The adapter piece has a holder, in which an end section of the spring arm of the spring element sits, and a contact surface section formed at its periphery, with which, when the system is assembled, it sits on the rail foot of the rail to be fixed, such that the elastic retaining force exerted by the spring element is transferred onto the rail foot.

1 . System for fixing a rail onto a foundation comprising:
 a spring element, which can be clamped against the foundation by means of a clamping element, wherein the spring element has at least one spring arm; and   an adapter piece, which has a holder, in which an end section of the spring arm of the spring element sits, wherein the adapter piece has a contact surface section formed at its periphery, with which, when the system is assembled, it sits on the rail foot of the rail to be fixed, such that the elastic retaining force exerted by the spring element is transferred onto the rail foot; and   wherein the adapter piece is rotatably mounted on the end section of the spring arm about a rotary axis, such that the adapter piece has at its periphery at least two contact surface sections, one of which, depending on the rotary position of the adapter piece, in each case lies against the rail foot, and such that one contact surface section of the adapter piece has a greater distance from the rotary axis of the adapter piece than the other contact surface section.   
     
     
         2 . The system according to  claim 1 , wherein the spring element is an ω-shaped clamp with two spring arms and a respective adapter piece is allocated to each of the spring arms. 
     
     
         3 . The system according to  claim 1 , wherein the adapter piece electrically isolates the spring element from the rail foot. 
     
     
         4 . The system according to  claim 1 , comprising a guide plate, comprising a face allocated to the rail foot and a free top side, this face allocated to the rail foot having a contact surface, and the free top side having a sliding surface limiting the contact surface and rising in the direction of the contact surface, via which the adapter piece can be moved from a pre-assembly position, established by a stop formed on the guide plate, in which it sits with its selected contact surface section on the guide plate, into an assembly position in which it sits with the contact surface section on the rail foot of the rail to be fixed, in order to transfer the elastic retaining force exerted by the spring element onto the rail foot. 
     
     
         5 . The system according to  claim 1 , wherein a support plate is provided which extends transverse to the rail to be fixed over the width of the guide plate; the support plate is arranged to compensate for height differences between the guide plate and a foundation; the support plate has a rectangular base form and comprises a passage opening for the clamping element used for clamping the spring element; and the support plate is divided into two parts along a joint line which is guided from a long side of the support plate aligned transverse to the rail to be fixed, at a distance from a short side to a passage opening and from there intersecting the passage opening in the direction of the short side of the support plate. 
     
     
         6 . An adapter piece for a system formed according to  claim 1 , comprising a holder in which an end section of the spring arm of the spring element can be inserted, wherein the adapter piece at its periphery has at least two contact surface sections, each one of which is provided, depending on the assembly position of the adapter piece, to lie on a rail foot of the respective rail to be fixed, and each one of which has a distance from the centre axis of the holder that differs from the distance of the respective other contact surface section from the centre axis of the holder. 
     
     
         7 . The adapter piece according to  claim 6 , wherein the contact surface sections are even in each rotary position of the adapter piece. 
     
     
         8 . The adapter piece according to  claim 6 , wherein the contact surface sections are adjacent to each other and separated in each rotary position of the adapter piece by an edge. 
     
     
         9 . The adapter piece according to  claim 6 , wherein the adapter piece is elastic in its peripheral direction and the holder of the adapter piece is smaller by a slight amount than the periphery of the end section of the spring arm of the spring element allocated to it, such that in the assembly position the adapter piece is held on the end section of the spring arm of the spring element by form fit and friction fit. 
     
     
         10 . The adapter piece according to  claim 6 , wherein the holder of the adapter piece is formed as a blind-hole opening, in the base of which a passage opening is formed. 
     
     
         11 . The adapter piece according to  claim 9 , wherein a slot extending in the radial direction is formed in the peripheral wall limiting the holder. 
     
     
         12 . The adapter piece according to  claim 11 , wherein the slot continues into the base of the holder and forms the passage opening in the area of the base.