EP0805899A1 - Rail element, in particular for subway, tramway and railway tracks - Google Patents

Rail element, in particular for subway, tramway and railway tracks

Info

Publication number
EP0805899A1
EP0805899A1 EP96901750A EP96901750A EP0805899A1 EP 0805899 A1 EP0805899 A1 EP 0805899A1 EP 96901750 A EP96901750 A EP 96901750A EP 96901750 A EP96901750 A EP 96901750A EP 0805899 A1 EP0805899 A1 EP 0805899A1
Authority
EP
European Patent Office
Prior art keywords
head
rail
tongue
seat
bolts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96901750A
Other languages
German (de)
French (fr)
Other versions
EP0805899B1 (en
Inventor
Claudio Favaron
Tiziano Mason
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mecno-Rail Srl
Original Assignee
FAMA Srl
MECNO Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IT95VE000004 external-priority patent/IT239178Y1/en
Priority claimed from IT95VE000014 external-priority patent/IT239187Y1/en
Application filed by FAMA Srl, MECNO Srl filed Critical FAMA Srl
Publication of EP0805899A1 publication Critical patent/EP0805899A1/en
Application granted granted Critical
Publication of EP0805899B1 publication Critical patent/EP0805899B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B7/00—Switches; Crossings
    • E01B7/02—Tongues; Associated constructions
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B5/00—Rails; Guard rails; Distance-keeping means for them
    • E01B5/02—Rails
    • E01B5/08—Composite rails; Compound rails with dismountable or non-dismountable parts
    • E01B5/10—Composite grooved rails; Inserts for grooved rails

Definitions

  • This invention relates to a rail element, in particular for subway, tramway and railway tracks.
  • the traditional railway or tramway superstructure generally comprises two rails supported by sleepers resting on ballast. In other cases it is also known to replace the sleepers and ballast with a single concrete bed.
  • the rails are grooved, and the entire superstructure is embedded in the roadway, with the rail iron surface at the same level as the road surface, and the connection between adjacent rails being made by joints or welding.
  • Total rail replacement involves on the one hand the problem of cost deriving from the material and the labour employed, and on the other hand problems of service interruption along the line, traffic problems and problems related to the excavation and renovation of the seat housing the rail.
  • the switch formed from a movable element known as the switch tongue which is interposed between two fixed elements known as stock rails, each consisting of a piece of rail which is suitably machined in the region below the head, is screwed to a support plate and is welded at its ends to the prolongations of the track rails.
  • the blade also consisting of a shaped rail element, is thinned at one end to be able to perfectly fit below the head of the adjacent stock rail.
  • Figure 1 is an exploded perspective view of a rail element according to the invention
  • Figure 2 is a cross-section thereof
  • Figure 3 shows a modified embodiment thereof in the same view as Figure 2;
  • Figure 4 shows a further modified embodiment thereof in the same view as Figure 2;
  • Figure 5 is a cross-section through a rail element for railway tracks;
  • Figure 6 schematically shows the connection between two rail elements;
  • Figure 7 is a schematic plan view of a switch formed from the rail element of the invention.
  • Figure 8 is a cross-section therethrough on the line VIII- VIII of Figure 7; and
  • Figure 9 is a cross-section therethrough on the line IX-IX of
  • the rail element of the invention comprises substantially a monolithic iron body 2 of substantially H-shaped cross-section, closed lowerly to form a chamber 4 and provided externally with two appendices 6 for its fixing to support plates 7 and shaped substantially as the support flanges of traditional rails.
  • Said monolithic body 2 comprises two sidepieces 8 forming a seat 10 for housing the head 12 and the counterblade 14, constituting the wheel contact elements.
  • the head 12 and counterblade 14 are fixed by bolts 16 engaged in self-locking threaded bushes 17 screwed into a seat 18.
  • Gaskets 29 of self-adhesive rubber are interposed between the outer surface of the head and/or the blade and the inner surface of the box seat.
  • the interior of the chamber 4 can be filled with sound- absorbent material 20.
  • the monolithic body 2 is rested on the roadway 23 or embedded in it and welded to the adjacent elements to create a continuous structure.
  • Each H-shaped element is welded to plates 7 which have the same purpose as traditional sleepers.
  • the plates 7 rest on an insulating anti-vibration layer.
  • the space between the two H-shaped elements can be provided with reinforcements and filled with concrete, or can be covered with a continuous plate 25 to provide a seat for the passage of cables and/or manifolds.
  • the rolling element (head 12 and counterblade 14) is then inserted into the seat 10 and is fixed to the base by the bolts 16.
  • the butt joint between adjacent elements is made at an angle of 45° to the cross-section.
  • the rail element according to the invention has numerous advantages, and in particular: - it enables the head and counterblade to be easily replaced in accordance with programmed maintenance at very low cost compared with the cost of installing the entire rail, in that it necessitates merely the removal of the worn parts without involving the road surface, hence avoiding long traffic interruptions and all the discomfort connected therewith; - it enables the removable element to be constructed of a different material than the structure itself, which material can be of greater strength and moreover is not subject to any limitation regarding welding, as is the constituent material of the monolithic body;
  • the superstructure If the superstructure is positioned on the roadway, it can be arranged between the two road lanes and a ramp 22 be applied to the outer surfaces of the box structures housing the rails.
  • the head 12 and counterblade 14 are formed as separate parts, each of them being fixed to the structure 2 by corresponding bolts 16.
  • This embodiment has the further advantage of being able to replace merely that part of the rail element subjected to greater wear, for example on bends.
  • the rail is fixed to the box body 2 by inserting a bolt 16 through a slotted hole 21 of different width and engaging it in a nut 19 after interposing a bush 31 and a coil spring 32.
  • This embodiment presents greater stability of rail fixing to the box body and avoids any problem relating to possible thermal and/or mechanical deformation of the bolt.
  • a traditional rail (Vignole) is shown with the top 12' of the head resting via the connection surface 24 on the upper edges of the shoulders 8 of the body 2.
  • the head is fixed by inserting bolts 28 through the body shoulders to engage the shank 30 of the head.
  • FIGS 7-9 show a rail 33 prolonged by a switch 34 for directing a vehicle either onto the rail 35 or onto the rail 35'.
  • the switch 34 consists of a piece shaped upperly to form a seat 36 for housing the switch tongue 38, the two corresponding stock rails 40, 40' and the section bar 41 directly in contact with the heel 43 of the tongue 38.
  • the two stock rails 40, 40' and the section bar 41 are fixed to the base of the seat 36 by traditional bolts 42, whereas the switch tongue 38 is screwed to the box body in correspondence with the heel 43 and slides with its toe 45 on the base of said seat via an interposed plate (not shown on the drawings) of antiwear material.
  • the interior of the chamber 4 is filled with sound absorbent material and can also house traditional electrical resistance heater elements (not shown on the drawings) to ensure movement of the switch tongue even in the coldest weather.
  • the deviation element can also be used for cross-overs, in which case the movable elements are in the form of a single profiled piece comprising two crossing groves.
  • the invention foreseen that, due to the displacement of the switch tongue a space occuring in correspondece of the front end of the heel and the facing end of the switch tongue, this displacement causing a wear in this zone, the heel is hinged near the end facing the adiacent rail and is elastically biased to follow the displacement of the switch tongue.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Railway Tracks (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)

Abstract

A rail element in particular for subway, tramway and railway tracks, characterised by consisting of a monolithic box structure (2) upperly comprising a seat (10) for removably connecting the wheel guide element (12, 12', 14, 38).

Description

RAIL ELEMENT, IN PARTICULAR FOR SUBWAY, TRAMWAY AND RAILWAY TRACKS
This invention relates to a rail element, in particular for subway, tramway and railway tracks. The traditional railway or tramway superstructure generally comprises two rails supported by sleepers resting on ballast. In other cases it is also known to replace the sleepers and ballast with a single concrete bed.
If the superstructure is of tramway type, the rails are grooved, and the entire superstructure is embedded in the roadway, with the rail iron surface at the same level as the road surface, and the connection between adjacent rails being made by joints or welding.
However, this type of superstructure and its connection system have certain drawbacks, and in particular:
- the need to form a seat of about 70-80 cm depth, whith a consequent increase in the unit constructional cost of the line. Even for a superstructure with a concrete bed it is still necessary to excavate a seat of about 50-60 cm depth; - mutual sliding of the surfaces if the connection between adjacent rails is made by joint, with consequent jolting of the vehicle wheel when it passes over;
- if the connection is made by welding, the formation of slight depressions due to shrinkage deriving from the different material structure; - noise and vibration problems as these rails generally deform with time, with wear both of the head and of the inner and outer walls.
To obviate this latter problem, which causes considerable annoyance both to the inhabitants of zones surrounding the rail area, and to the occupants of the vehicle using them, it is necessary to provide for frequent maintenance on the installed rail, and in certain cases its total replacement.
Total rail replacement involves on the one hand the problem of cost deriving from the material and the labour employed, and on the other hand problems of service interruption along the line, traffic problems and problems related to the excavation and renovation of the seat housing the rail.
In contrast, if maintenance is carried out on the installed rail there is a certain difficulty in carrying out wear compensation welding on the inner and outer walls and on the rolling surface as this operation is influenced by environmental conditions, and the difficulty of preheating the rail with the risk of detachment of the added material and rail cracking. This operation also causes further discomfort because of the dust and noise which it produces.
Additionally, there is a further problem of a bureaucratic nature which the maintenance concern has to confront, relating to the numerous permits to be obtained for interrupting the road service, for transporting large loads, etc.
It should be noted that these same problems are also encountered for the switch, formed from a movable element known as the switch tongue which is interposed between two fixed elements known as stock rails, each consisting of a piece of rail which is suitably machined in the region below the head, is screwed to a support plate and is welded at its ends to the prolongations of the track rails. The blade, also consisting of a shaped rail element, is thinned at one end to be able to perfectly fit below the head of the adjacent stock rail.
According to the invention all these drawbacks are eliminated by a rail element in particular for subway, tramway and railway tracks, as described in claim 1.
The present invention is further described hereinafter with reference to the accompanying drawings, in which: Figure 1 is an exploded perspective view of a rail element according to the invention; Figure 2 is a cross-section thereof;
Figure 3 shows a modified embodiment thereof in the same view as Figure 2; Figure 4 shows a further modified embodiment thereof in the same view as Figure 2; Figure 5 is a cross-section through a rail element for railway tracks; Figure 6 schematically shows the connection between two rail elements;
Figure 7 is a schematic plan view of a switch formed from the rail element of the invention; Figure 8 is a cross-section therethrough on the line VIII- VIII of Figure 7; and Figure 9 is a cross-section therethrough on the line IX-IX of
Figure 7. As can be seen from the figures, the rail element of the invention comprises substantially a monolithic iron body 2 of substantially H-shaped cross-section, closed lowerly to form a chamber 4 and provided externally with two appendices 6 for its fixing to support plates 7 and shaped substantially as the support flanges of traditional rails.
Said monolithic body 2 comprises two sidepieces 8 forming a seat 10 for housing the head 12 and the counterblade 14, constituting the wheel contact elements.
The head 12 and counterblade 14 are fixed by bolts 16 engaged in self-locking threaded bushes 17 screwed into a seat 18.
Gaskets 29 of self-adhesive rubber are interposed between the outer surface of the head and/or the blade and the inner surface of the box seat.
The interior of the chamber 4 can be filled with sound- absorbent material 20.
To mount the rail element on the roadway, the monolithic body 2 is rested on the roadway 23 or embedded in it and welded to the adjacent elements to create a continuous structure. Each H-shaped element is welded to plates 7 which have the same purpose as traditional sleepers. Preferably the plates 7 rest on an insulating anti-vibration layer.
The space between the two H-shaped elements can be provided with reinforcements and filled with concrete, or can be covered with a continuous plate 25 to provide a seat for the passage of cables and/or manifolds. The rolling element (head 12 and counterblade 14) is then inserted into the seat 10 and is fixed to the base by the bolts 16. The butt joint between adjacent elements is made at an angle of 45° to the cross-section.
From the aforegoing it is apparent that the rail element according to the invention has numerous advantages, and in particular: - it enables the head and counterblade to be easily replaced in accordance with programmed maintenance at very low cost compared with the cost of installing the entire rail, in that it necessitates merely the removal of the worn parts without involving the road surface, hence avoiding long traffic interruptions and all the discomfort connected therewith; - it enables the removable element to be constructed of a different material than the structure itself, which material can be of greater strength and moreover is not subject to any limitation regarding welding, as is the constituent material of the monolithic body;
- it presents high sound absorption by virtue of the filling of the internal chamber 4;
- it enables the profile of the removable elements to be effectively restored, as this can now be done directly in the workshop;
- it enables antiwear weld material to be effectively applied, as this can now be done directly in the workshop using suitable material and adequately preheating if required; - it enables a reduced-height of a traditional rail, ie about 30-40 cm. If the superstructure is positioned on the roadway, it can be arranged between the two road lanes and a ramp 22 be applied to the outer surfaces of the box structures housing the rails.
In the embodiment shown in Figure 3, the head 12 and counterblade 14 are formed as separate parts, each of them being fixed to the structure 2 by corresponding bolts 16.
This embodiment has the further advantage of being able to replace merely that part of the rail element subjected to greater wear, for example on bends.
In the embodiment shown in Figure 4 the rail is fixed to the box body 2 by inserting a bolt 16 through a slotted hole 21 of different width and engaging it in a nut 19 after interposing a bush 31 and a coil spring 32. This embodiment presents greater stability of rail fixing to the box body and avoids any problem relating to possible thermal and/or mechanical deformation of the bolt.
In the embodiment shown in Figure 5 a traditional rail (Vignole) is shown with the top 12' of the head resting via the connection surface 24 on the upper edges of the shoulders 8 of the body 2. In this configuration the head is fixed by inserting bolts 28 through the body shoulders to engage the shank 30 of the head.
Figures 7-9 show a rail 33 prolonged by a switch 34 for directing a vehicle either onto the rail 35 or onto the rail 35'. The switch 34 consists of a piece shaped upperly to form a seat 36 for housing the switch tongue 38, the two corresponding stock rails 40, 40' and the section bar 41 directly in contact with the heel 43 of the tongue 38. The two stock rails 40, 40' and the section bar 41 are fixed to the base of the seat 36 by traditional bolts 42, whereas the switch tongue 38 is screwed to the box body in correspondence with the heel 43 and slides with its toe 45 on the base of said seat via an interposed plate (not shown on the drawings) of antiwear material.
The interior of the chamber 4 is filled with sound absorbent material and can also house traditional electrical resistance heater elements (not shown on the drawings) to ensure movement of the switch tongue even in the coldest weather.
Although the invention has been described with reference to a switch, the deviation element can also be used for cross-overs, in which case the movable elements are in the form of a single profiled piece comprising two crossing groves.
In a further embodiment (not shown in the drawings) the invention foreseen that, due to the displacement of the switch tongue a space occuring in correspondece of the front end of the heel and the facing end of the switch tongue, this displacement causing a wear in this zone, the heel is hinged near the end facing the adiacent rail and is elastically biased to follow the displacement of the switch tongue.

Claims

C L A I M S
1. A rail element in particular for subway, tramway and railway tracks, characterised by consisting of a monolithic box structure (2) upperly comprising a seat (10) for removably connecting the wheel guide element (12, 12', 14, 38) .
2. An element as caimed in claim 1, characterised in that the wheel guide element consists of a head (12) and a counterblade (14) .
3. An element as claimed in claim 2, characterised in that the head (12) and the counterblade (14) are fixed to the base of the seat by bolts (16) .
4. An element as claimed in claim 1, characterised in that the structure (2) is of iron material, is substantially of H shape and is closed lowerly to form a chamber (4) .
5. An element as claimed in claim 4, characterised in that the chamber (4) is filled with sound absorbent material (20) .
6. An element as claimed in claim 4, characterised in that the interior of the chamber (4) houses manifolds for conduits and/or cables.
7. An element as claimed in claim 1, characterised in that the structure is prolonged externally into two appendices (6) shaped substantially as the support flanges of traditional rails.
8. An element as claimed in claim 1, characterised in that the head (12) and the counterblade (14) are formed in separate pieces.
9. An element as claimed in claim 1, characterised in that the head has the profile of a traditional railway rail head (12').
10. An element as claimed in claim 3, characterised in that the bolts (16) are engaged in self-locking threaded bushes (17) screwed into corresponding seats (18) .
11. An element as claimed in claim 3 characterised in that the bolts (16) pass through a slotted hole (21) and engage a nut (19) after underposition of a bush (31) and a coil spring (32).
12. An element as claimed in claim 1 characterised in that between the outer surface of the head (12) and/or the blade (14) and the inner surface of the box seat rubber gaskets (29) are interposed.
13. An element as claimed in claim 1 characterised in that the box structure is welded to plates (7) , having the same purposes as traditional sleepers.
14. An element as claimed in claim 13 characterised in that the space between the parallel box structures is provided with renforce ents and filled with concrete.
15. An element as claimed in claim 13 characterised in that the space between the parallel box structures is covered with a continuous plate (25) .
16. An element as claimed in claim 1 characterised in that a ramp (22) is applied to the outer surface of the box structures.
17. An element as claimed in claim l, characterised in it consists of a switch (34) and in that the guide elements consist of a tongue (38) , two corresponding stock rails (40, 40') and a section bar (41) directly in contact with the heel (43) of the tongue (38).
18. An element as claimed in claim 1, characterised by consisting of a cross-over, the guide elements consisting of a shaped piece comprising two crossing grooves.
19. An element as claimed in claim 17, characterised in that the stock rails (40, 40') are fixed to the base of the seat (36) by bolts (42) , the movable tongue (38) being screwed to the structure at the heel (43) .
20. An element as claimed in claim 17, characterised in that the tongue (38) slides with its toe (45) on a plate of antiwear material.
21. An element as claimed in claim 19 characterised in that the heel (43) is hinged near the end facing the adjacent rail and is elastically biased to follow the displacement of the switch tongue.
EP96901750A 1995-01-26 1996-01-22 Rail element, in particular for subway, tramway and railway tracks Expired - Lifetime EP0805899B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
ITVE950004U 1995-01-26
IT95VE000004 IT239178Y1 (en) 1995-01-26 1995-01-26 DEVIATION DEVICE FOR TRACKS, IN PARTICULAR FOR RAILWAYS, RAILWAYS AND TRAMS
IT95VE000014 IT239187Y1 (en) 1995-04-07 1995-04-07 RAIL ELEMENT, IN PARTICULAR FOR METROPOLITAN, RAILWAY AND RAILWAY RAIL TRACKS
ITVE950014U 1995-04-07
PCT/EP1996/000241 WO1996023106A1 (en) 1995-01-26 1996-01-22 Rail element, in particular for subway, tramway and railway tracks

Publications (2)

Publication Number Publication Date
EP0805899A1 true EP0805899A1 (en) 1997-11-12
EP0805899B1 EP0805899B1 (en) 1999-11-03

Family

ID=26332569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96901750A Expired - Lifetime EP0805899B1 (en) 1995-01-26 1996-01-22 Rail element, in particular for subway, tramway and railway tracks

Country Status (5)

Country Link
EP (1) EP0805899B1 (en)
AT (1) ATE186346T1 (en)
AU (1) AU4620496A (en)
DE (1) DE69605022T2 (en)
WO (1) WO1996023106A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1631721A2 (en) * 2003-05-28 2006-03-08 BWG GmbH & Co. KG Bearing and fixing device for a rail section and assembly of a switch or the like
DE102009026049A1 (en) 2009-06-29 2010-12-30 Voestalpine Bwg Gmbh & Co. Kg rail
DE102010037110A1 (en) * 2010-05-12 2011-11-17 Voestalpine Bwg Gmbh & Co. Kg Track device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9443C (en) R. BISHOP in London Innovations to horse-drawn railways
AT44221B (en) * 1908-05-15 1910-09-26 Franz Melaun Interchangeable wheel-bearing lining of the ruts at tram-track crossings, switch frogs and curved rails.
US968617A (en) * 1909-12-15 1910-08-30 Thomas Henry Wheless Compound rail.
US1260148A (en) 1917-10-13 1918-03-19 William G Coughlin Compound railroad-rail.
US1398119A (en) * 1921-06-25 1921-11-22 William H Taylor Railroad-tie
DE482683C (en) * 1927-12-14 1929-09-18 Schmidt Paul Grooved rail switch
DE1131712B (en) * 1960-02-10 1962-06-20 Holzmann Philipp Ag Railway track on a rigid substructure
DE2042486B1 (en) * 1970-08-27 1971-12-16 Schreck Mieves Gmbh TONGUE DEVICE F] R GROOVED RAIL SWITCHES
DE2856850C2 (en) * 1978-12-30 1983-10-27 Thyssen Industrie Ag, 4300 Essen Switch with switch tongues that slide on sliding chairs
DE4142276A1 (en) * 1991-12-20 1993-07-01 Butzbacher Weichenbau Gmbh UNDERLAY FOR A MOVABLE TOP SECTION

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9623106A1 *

Also Published As

Publication number Publication date
AU4620496A (en) 1996-08-14
DE69605022T2 (en) 2000-06-08
DE69605022D1 (en) 1999-12-09
EP0805899B1 (en) 1999-11-03
WO1996023106A1 (en) 1996-08-01
ATE186346T1 (en) 1999-11-15

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