ITVE20030002U1 - EXCHANGE FOR RAILS, IN PARTICULAR FOR UNDERGROUND RAIL TRACKS, TRANVIARIES, RAILWAYS - Google Patents

Abstract

A rail switch, comprising a box support (2) for fixing the rail pieces forming the two stock rails (12) and for hinging the rail piece forming the point (14), characterised in that at least in correspondence with the toe of the point, the horizontal surface of the box support is provided with a hole (20) for access to the lower cavity (22) formed by the box support, said cavity housing a plurality of columns (24) spaced from the edge of the hole and supporting the point (14) for any position thereof during its travel.

Description

The present innovation relates to an exchange for rails, in particular for tracks of metropolitan, tramway and railway rails.

Switches for rails are known consisting of a movable element called needle which is interposed between two fixed elements called counter-needles, each consisting of a length of rail suitably machined in the area below the mushroom.

The two counter-needles are fixed to a support plate, to which the needle is also articulated and their ends are welded to the extensions of the track rails.

The needle, also consisting of a shaped rail element, is tapered at one end so as to fit perfectly under the head of the adjacent counter-needle.

In the case of tramway or railway tracks inserted in the road pavement, these known switches have the drawback of the continuous deposit of bodies, such as stones, dirt, between the needle and the counter-needle, which bodies prevent the needle from moving from the open position to the closed position. preventing the coupling with the counter-needles and consequently the malfunction of the switch.

From this derives the need for continuous control and maintenance of the exchange with all the consequent costs.

According to the invention, these drawbacks are eliminated with an exchange for rails, comprising a boxed support for fastening the rail segments constituting the two counter-needles and for articulation of the rail segment constituting the needle, characterized in that the horizontal surface of the boxed support is affected, at least at the tip of the needle, by an access hole to the lower cavity formed by the boxed support and that a plurality of columns spaced from the edge of the hole and supporting the needle itself in any position are housed in said cavity of the race.

The present innovation is further clarified below with reference to the attached drawings tables, in which:

Figure 1 shows an exploded perspective view of an exchange portion according to the invention,

Figure 2 shows it in an assembled perspective view,

Figure 3 shows an exploded plan view,

Figure 4 shows it in an assembled plan,

figure 5 shows it according to the section V-V of fig. 3,

figure 6 shows it according to the section VI-VI of fig. 3,

figure 7 shows it according to section VII-VII of fig. 3, and

Figure 8 shows it in an enlarged section.

As can be seen from the figures, the switch for rails according to the invention substantially comprises an inverted U-shaped box structure 2, with a substantially rectangular plan, welded at the lower ends of the uprights 4 to a plate 6 for anchoring to the ground 8.

The two counter-needles 12 of a track section, between which the needle 14 is interposed, is interposed, free at the tip 16, by means of bolts or other locking systems (not shown in the drawings) to the horizontal surface 10 of the structure 2. and articulated to the structure at the heel 18.

The surface 10 of the box-like structure is affected in correspondence with the area of the tip 16 of the needle 14 by a substantially rectangular hole 20 for accessing the lower cavity 22 of the box-like structure 10, and it houses a plurality of columns 24 with the upper plane substantially coplanar with the plane of the surface of the structure and longitudinally aligned with each other so as to allow the tip 16 of the needle 14 to rest for any position of its stroke.

In particular, each column has its upper end covered with a removable plate 26 made of anti-friction material.

Inside the cavity there are also inserted, in both parts of the row of columns 24, two ducts 28 leading to a water supply pipe 30 for cleaning the cavity.

The anchoring plate 6 is also affected by a hole 30 for discharging said water connected to a collecting sump 32.

From what has been said it is clear that the exchange for rails according to the innovation allows, thanks to the empty space existing around the columns, that any bodies that are interposed between the needle and the counter-needles fall into the underlying cavity, eliminating the aforementioned drawbacks.

Claims (5)

R I V E N D I C A Z I O N I 1. Exchange for rails, comprising a box-shaped support (2) for fastening the sections of rail constituting the two counter-needles (12) and for articulation of the section of rail constituting the needle (14), characterized in that the horizontal surface of the support is affected, at least in correspondence with the tip of the needle, by a hole (20) for accessing the lower cavity (12) formed by the boxed support and in which a plurality of columns (24) spaced from the edge of the hole are housed in said cavity and supporting the needle (14) itself in any position of its stroke. 2. Exchange according to claim 1 characterized in that the hole (20) is a slotted hole. Exchange according to claim 2 characterized in that the hole (20) has a rectangular shape. 4. Exchange according to claim 1 characterized in that the columns (24) are provided at the top with a removable wear plate (26). 5. Exchange according to claim 1 characterized in that the lower cavity (12) houses at least one water supply duct (28).