Patent ID: 6189840
Filing Date: 2001-02-20
Classification: E01B

Abstract:
A roller device for displacement of a railroad switching rail, comprising a basis structure (10) provided at an end with a horizontally S-shaped laminar locking rib (1), said structure (10) being centrally provided with a pair of trapezium-shaped longitudinal plates (2) parallel to each other, each of said longitudinal plates having in its mid-portion a pair of rectangular cuts (3) extending from an upper edge to half a height of the longitudinal plate (2), with ends of shafts (4) of corresponding rollers (5) being attached to said cuts (3) for allowing rotational movements of the rollers (5) around their own axes and relatively to said longitudinal plates (2); wherein, on an opposite end of the basic structure (10), a L-shaped laminar rib (8) is attached, the L-shaped rib (8) is mounted on a transversal support (11) defined by an U-shaped folded plate with horizontal extents (11a) which are provided with oblong holes (11b), through-bolts (11c) pass through said oblong holes (11b); and the L-shaped rib (8) is provided with a pair of through-holes (8a) that receive further through-bolts (8b), the further through-bolts (8b) are fixed at a lower portion of the transversal support (11), each of said further through-bolts (8b) extends through a steel spring (9) positioned between a lower face of the L-shaped rib (8) and an upper face of the lower portion of the transversal support (11), so as to exert a separation force between said L-shaped rib (8) and said transversal support (11); and a small horizontally L-shaped lock (8c) is secured to said L-shaped rib (8) by another bolt (8d), said L-shaped lock (8c) being positioned against one of said further through-bolts (8b) to prevent rotation of the further through-bolt (8b).