CA2068903C - Switch for grooved rails - Google Patents
Switch for grooved rails Download PDFInfo
- Publication number
- CA2068903C CA2068903C CA002068903A CA2068903A CA2068903C CA 2068903 C CA2068903 C CA 2068903C CA 002068903 A CA002068903 A CA 002068903A CA 2068903 A CA2068903 A CA 2068903A CA 2068903 C CA2068903 C CA 2068903C
- Authority
- CA
- Canada
- Prior art keywords
- rail
- tongue
- switch
- profiled
- stock
- 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.)
- Expired - Fee Related
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
- E01B7/00—Switches; Crossings
- E01B7/02—Tongues; Associated constructions
- E01B7/06—Constructions with flexible tongues or flexible fishplates
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2202/00—Characteristics of moving parts of rail systems, e.g. switches, special frogs, tongues
- E01B2202/02—Nature of the movement
- E01B2202/025—Pure translation
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2202/00—Characteristics of moving parts of rail systems, e.g. switches, special frogs, tongues
- E01B2202/04—Nature of the support or bearing
- E01B2202/042—Sliding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanisms For Operating Contacts (AREA)
- Push-Button Switches (AREA)
- Railway Tracks (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Gear-Shifting Mechanisms (AREA)
- Vending Machines For Individual Products (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The switch is constituted by a profiled cradle forming the housing of a movable tongue-rail (18) for deviation and constituted by a profiled body (20) constructed by machining by removal of swarf. In order to reduce the machining waste and to improve the reliability of movement of the tongue-rail, the body (20) is bolted between a stock-rail (22) and an opposite rail (24), both deprived of their adjacent foot over the entire length of the body (20) and the upper surface of the body (20) supporting the movable part of the tongue-rail (18) is profiled so as to present flat pillow blocks (28) for support of the tongue-rail (18) alternating with recesses (30) machined in the body (20).
Description
~o~~oo~
SWrTCH FOR GROOVEn RA.'L:LS
The present invention relates to a switch for grooved rails of rail traffic, constituted by a profiled cradle forming the housing of a movable 'tongue-rail for deviation, and also the rolling and guiding surfaces permitting the movement of the tongue-rail, the cradle being constituted by a profiled body produced by machining by removal of swarf.
The invention relates more particularly, without being limited thereto, to a switch for the tracks of urban transport systems or of port i.nstalla~tions, whose rails are buried in the surface of t;he road network.
These switches were, hitherto, generally constructed by assembling various components, of different quality and shape, manufactured to measure, either by, casting or by machining, and assembled manually, usually by welding.
Patent LU-87,503 proposes a new process for production of switches of the type described above, which is performed entirely by machining exclusively by removal of swarf. This process for production of switches has many advantages; these include the possibility of automated production under programmed control, the possibility of eliminating welds and the fact of not having to carry a large stock of spare parts or to be dependent on the supply of these parts.
In order to reduce machining time and waste, Patent LU-87,721 proposes to retain the stock-rail and to associate it, aftex removal of the inner part of its foot, by bolting, with the machined body.
The purpose of the present invention is to provide an improved , semi-assembled and semi-machined switch , in which the non-machined parts are standard parts and which permit a more reliable movement of the tongue-rail.
In order. to attain this objective, the invention proposes a switch of the kind described in the preamble, which is essentially characterised in that the body is 20~~9~~
bolted between a stock-rail and an opposite rail, both deprived of their adjacent foot over the entire length of the body, in that the stock-rail is deprived of its groove over the length of mobility of the tongue-rail and in that the upper surface of the body supporting the movable part of the tongue-rail is profiled so as to present flat pillow blocks for support of the tongue-rail alternating with recesses machined in the body.
The parts most vulnerable to wear are the stock rail and the opposite rail. Given that these parts are standard parts, they are always available and can be replaced individually after wear, since they are assembled by bolting to the machined body. Such an assembly also permits a better compensation of the machining tolerances. Compared with monobloc machined switches, the switches proposed by the present invention additionally make it possible to reduce the machining time and waste.
The risks of the movement of the tongue-rail being impeded by foreign bodies, stones for example, are reduced owing to the special design of the machined body, given that these foreign bodies can accumulate at the bottom of the recesses, where they do not hinder the movement of the tongue-rail.
Other features and characteristics of the invention will emerge from the detailed description of an advantageous embodiment, set out below by way of illustration, with reference to the accompanying figures in which:
Figure 1 shows a diagrammatic plan view of a switch ;
Figures 2. ~0 6 show cross-sections al~ng sectional planes of Figure 1 defined respectively by A, B, C, D and E and Figure 7 gives a perspective view of the part of the machined body supporting the movable part of the tongue-rail.
Figuxe 1 shows a pair of rails 10, 12 which are extended by a switchl4 designed to guide a train, either on the pair of rails 10a, 12a o.r on the pair of rails 10b, 12b. The switch operates in conventional manner; only the production process and, consequently, the profile of the parts used differ from the state of the art. This is illustrated by the different cross-sections as shown in Figures 2 to 6.
Figure 2 shows a cross-section of the switch at 'the tip of a tongue-rail 18. The housing of 'the tongue-rail 18 is delimited by a body 20 supporting the tongue-rail 18, a stock-rail 22 and an opposite rail 24 which are deprived of the inner part: of their foot and which are bolted to the body 20 with the aid of bolts 26 as shown in Figure 3.
The body 20 is produced by machining, preferably, by automatic milling under programmed control. According to one of the features of the present invention, the part of the body 20 supporting the movable part of the tongue rail 18 is, as shown in Figure 7, in the form of a succession of pillow blocks 28 and of recesses 30 separating the pillow blocks 28. Fach pillow block 28 comprises a perforation 32 permitting the passage of the bolts 26. The purpose of these recesses 30 is to collect foreign bodies, such as stones and gravel or the like which, without the presence of the recesses, could hinder the correct operation of the tongue--rail 18. To achieve optimum effect, the area of the recesses 30 is, preferably, greater than the area of the pillow blocks 28. Of course, the dirt which can accumulate in the recesses 30 must be removed by regular cleaning. To this end, the body 20 comprises a longitudinal machinsd channel 34 allowing cleaning water and rain water to run off .
The stock-rail 22 may be formed by the rail 10, 10a or the rail 12, 12b of the existing track or by a grooved rail welded to these rails. Over the length of mobility of the tongue-rail 18 the stock-rail 22 must be deprived of 9.ts groove so as to permit operation of the switch. Beyond the zone of activity of the tongue-.rail 18 the stack-rail 22 must, of course, possess its groove 36 as shown in Figure 4 and the following figures.
Although not compulsory, but desirable, if only to facilitate access to the bolt 26, the rail 24 may also be deprived of its groove over the entire length of the points. As shown in the figures, the two rails 22 and 24 retain, over the entire length, the outer part of their foot, and this contributes to a better symmetry and to integration with standard components.
The reference 44 denoi:es an electrical heating resistor. This is held in place by profiled washers 38 associated with the mounting k>olts 26. In Figure 2 the two rails 22 and 2.4 as well as the tongue-rail 18 are pierced horizontally in order to permit installation of the means, not shown, for moving the 'tongue-rail 18.
The invention therefore makes it possible to reduce a not inconsiderable part of the machining necessary for the production of a monobloc rail, by taking advantage of the existence of the stock-rail 22 and of the opposite rail 24. These two rails are standard sections from which it is sufficient to remove, by machining, the inner part of the foot and of the groove.
These two parts may also be replaced individually and separately, which is all the more advantageous as these are the parts most vulnerable to wear.
Figures 4, 5 and 6 show cross-sections through the rear part of the switch where the machined body 20 has a ridge 20a widening progressively and rising up to the upper level of the switch. This ridge 20a ensures the separation of the stock-rail 22 and the tongue-rail l8.
2n the embodiment shown, the heel of the tongue rail 18 is secured in the body 20 by means of a key 40.
The latter is, in its turn, wedged with the aid of a bolt 42 anchored in the body 20. In order to permit tightening of the bolt 42, the head of the rail 24 is removed at this place (see Figure 4).
Figure 6 shows a cross-section at the end of the switch at the place where the tongue-rail 18 and the rail ~o~~~o~
10b join.
As in known switches,it is possible to subject the body 20, after it has been machined, to a heat treatment or localised hardening so as to produce a surface hardening of the parts most exposed to stresses. Tt is also possible to perform surface refillings by welding so as to increase the strength locally.
SWrTCH FOR GROOVEn RA.'L:LS
The present invention relates to a switch for grooved rails of rail traffic, constituted by a profiled cradle forming the housing of a movable 'tongue-rail for deviation, and also the rolling and guiding surfaces permitting the movement of the tongue-rail, the cradle being constituted by a profiled body produced by machining by removal of swarf.
The invention relates more particularly, without being limited thereto, to a switch for the tracks of urban transport systems or of port i.nstalla~tions, whose rails are buried in the surface of t;he road network.
These switches were, hitherto, generally constructed by assembling various components, of different quality and shape, manufactured to measure, either by, casting or by machining, and assembled manually, usually by welding.
Patent LU-87,503 proposes a new process for production of switches of the type described above, which is performed entirely by machining exclusively by removal of swarf. This process for production of switches has many advantages; these include the possibility of automated production under programmed control, the possibility of eliminating welds and the fact of not having to carry a large stock of spare parts or to be dependent on the supply of these parts.
In order to reduce machining time and waste, Patent LU-87,721 proposes to retain the stock-rail and to associate it, aftex removal of the inner part of its foot, by bolting, with the machined body.
The purpose of the present invention is to provide an improved , semi-assembled and semi-machined switch , in which the non-machined parts are standard parts and which permit a more reliable movement of the tongue-rail.
In order. to attain this objective, the invention proposes a switch of the kind described in the preamble, which is essentially characterised in that the body is 20~~9~~
bolted between a stock-rail and an opposite rail, both deprived of their adjacent foot over the entire length of the body, in that the stock-rail is deprived of its groove over the length of mobility of the tongue-rail and in that the upper surface of the body supporting the movable part of the tongue-rail is profiled so as to present flat pillow blocks for support of the tongue-rail alternating with recesses machined in the body.
The parts most vulnerable to wear are the stock rail and the opposite rail. Given that these parts are standard parts, they are always available and can be replaced individually after wear, since they are assembled by bolting to the machined body. Such an assembly also permits a better compensation of the machining tolerances. Compared with monobloc machined switches, the switches proposed by the present invention additionally make it possible to reduce the machining time and waste.
The risks of the movement of the tongue-rail being impeded by foreign bodies, stones for example, are reduced owing to the special design of the machined body, given that these foreign bodies can accumulate at the bottom of the recesses, where they do not hinder the movement of the tongue-rail.
Other features and characteristics of the invention will emerge from the detailed description of an advantageous embodiment, set out below by way of illustration, with reference to the accompanying figures in which:
Figure 1 shows a diagrammatic plan view of a switch ;
Figures 2. ~0 6 show cross-sections al~ng sectional planes of Figure 1 defined respectively by A, B, C, D and E and Figure 7 gives a perspective view of the part of the machined body supporting the movable part of the tongue-rail.
Figuxe 1 shows a pair of rails 10, 12 which are extended by a switchl4 designed to guide a train, either on the pair of rails 10a, 12a o.r on the pair of rails 10b, 12b. The switch operates in conventional manner; only the production process and, consequently, the profile of the parts used differ from the state of the art. This is illustrated by the different cross-sections as shown in Figures 2 to 6.
Figure 2 shows a cross-section of the switch at 'the tip of a tongue-rail 18. The housing of 'the tongue-rail 18 is delimited by a body 20 supporting the tongue-rail 18, a stock-rail 22 and an opposite rail 24 which are deprived of the inner part: of their foot and which are bolted to the body 20 with the aid of bolts 26 as shown in Figure 3.
The body 20 is produced by machining, preferably, by automatic milling under programmed control. According to one of the features of the present invention, the part of the body 20 supporting the movable part of the tongue rail 18 is, as shown in Figure 7, in the form of a succession of pillow blocks 28 and of recesses 30 separating the pillow blocks 28. Fach pillow block 28 comprises a perforation 32 permitting the passage of the bolts 26. The purpose of these recesses 30 is to collect foreign bodies, such as stones and gravel or the like which, without the presence of the recesses, could hinder the correct operation of the tongue--rail 18. To achieve optimum effect, the area of the recesses 30 is, preferably, greater than the area of the pillow blocks 28. Of course, the dirt which can accumulate in the recesses 30 must be removed by regular cleaning. To this end, the body 20 comprises a longitudinal machinsd channel 34 allowing cleaning water and rain water to run off .
The stock-rail 22 may be formed by the rail 10, 10a or the rail 12, 12b of the existing track or by a grooved rail welded to these rails. Over the length of mobility of the tongue-rail 18 the stock-rail 22 must be deprived of 9.ts groove so as to permit operation of the switch. Beyond the zone of activity of the tongue-.rail 18 the stack-rail 22 must, of course, possess its groove 36 as shown in Figure 4 and the following figures.
Although not compulsory, but desirable, if only to facilitate access to the bolt 26, the rail 24 may also be deprived of its groove over the entire length of the points. As shown in the figures, the two rails 22 and 24 retain, over the entire length, the outer part of their foot, and this contributes to a better symmetry and to integration with standard components.
The reference 44 denoi:es an electrical heating resistor. This is held in place by profiled washers 38 associated with the mounting k>olts 26. In Figure 2 the two rails 22 and 2.4 as well as the tongue-rail 18 are pierced horizontally in order to permit installation of the means, not shown, for moving the 'tongue-rail 18.
The invention therefore makes it possible to reduce a not inconsiderable part of the machining necessary for the production of a monobloc rail, by taking advantage of the existence of the stock-rail 22 and of the opposite rail 24. These two rails are standard sections from which it is sufficient to remove, by machining, the inner part of the foot and of the groove.
These two parts may also be replaced individually and separately, which is all the more advantageous as these are the parts most vulnerable to wear.
Figures 4, 5 and 6 show cross-sections through the rear part of the switch where the machined body 20 has a ridge 20a widening progressively and rising up to the upper level of the switch. This ridge 20a ensures the separation of the stock-rail 22 and the tongue-rail l8.
2n the embodiment shown, the heel of the tongue rail 18 is secured in the body 20 by means of a key 40.
The latter is, in its turn, wedged with the aid of a bolt 42 anchored in the body 20. In order to permit tightening of the bolt 42, the head of the rail 24 is removed at this place (see Figure 4).
Figure 6 shows a cross-section at the end of the switch at the place where the tongue-rail 18 and the rail ~o~~~o~
10b join.
As in known switches,it is possible to subject the body 20, after it has been machined, to a heat treatment or localised hardening so as to produce a surface hardening of the parts most exposed to stresses. Tt is also possible to perform surface refillings by welding so as to increase the strength locally.
Claims (3)
1. A switch for a railway having grooved rails, the switch comprising: a movable switching tongue-rail (18), a profiled cradle forming a housing for the movable tongue-rail (18) and having rolling and guiding surfaces permitting switching movement of the tongue-rail, the cradle comprising a profiled body (20) formed by machining, characterised in that the profiled body (20) is bolted between a stock-rail (22) and an opposite rail (24), bath of which have a foot, opposing portions of which are absent over the entire length of the profiled body (20), in that the stock-rail (22) has no groove (36) over the length of mobility of the tongue-rail (18), and in that the upper surface of the profiled body (20) supporting the movable tongue-rail (18) is profiled so as to present flat pillow blocks (28) for support of the tongue-rail (18) alternating with recesses (30) machined in the profiled body (20).
2. Switch according to Claim 1, characterized in that the opposite rail (24) has no groove over the entire length of the switch.
3. Switch according to Claim 1, characterized in that the area of the recesses (30) is greater than that of the pillow blocks (28).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91108511.6 | 1991-05-25 | ||
| EP91108511A EP0515708B1 (en) | 1991-05-25 | 1991-05-25 | Switch for grooved rails |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2068903A1 CA2068903A1 (en) | 1992-11-26 |
| CA2068903C true CA2068903C (en) | 2003-12-02 |
Family
ID=8206772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002068903A Expired - Fee Related CA2068903C (en) | 1991-05-25 | 1992-05-19 | Switch for grooved rails |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0515708B1 (en) |
| AT (1) | ATE118849T1 (en) |
| AU (1) | AU1712592A (en) |
| CA (1) | CA2068903C (en) |
| DE (1) | DE69107614T2 (en) |
| DK (1) | DK0515708T3 (en) |
| ES (1) | ES2068424T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT405848B (en) * | 1994-01-19 | 1999-11-25 | Vae Ag | Tongue device on a grooved rail switch |
| DE19517428C1 (en) * | 1995-05-05 | 1996-09-05 | Etw Weichenbau Zossen Gmbh | Points for rail traffic, especially for trams |
| CZ2008467A3 (en) * | 2008-07-31 | 2010-02-10 | Dt-Výhybkárna A Strojírna, A. S. | Block-type tramway rail half switch |
| DE102016001631A1 (en) | 2016-02-15 | 2017-08-17 | Heinrich Krug GmbH & Co. KG | Tongue device, in particular grooved-tongue device and method for producing a tongue device |
| DE102017129825A1 (en) * | 2017-09-19 | 2019-03-21 | Voestalpine Bwg Gmbh | A tongue device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT26715B (en) * | 1905-11-06 | 1906-12-10 | Benvenuto Pajer-Monriva | Tram switch for rails with groove. |
| DE1872735U (en) * | 1963-02-07 | 1963-05-30 | Deutschland A G Maschf | TONGUE DEVICE FOR SWITCHES IN THE PAVEMENT. |
-
1991
- 1991-05-25 DE DE69107614T patent/DE69107614T2/en not_active Expired - Fee Related
- 1991-05-25 ES ES91108511T patent/ES2068424T3/en not_active Expired - Lifetime
- 1991-05-25 DK DK91108511.6T patent/DK0515708T3/en active
- 1991-05-25 AT AT91108511T patent/ATE118849T1/en not_active IP Right Cessation
- 1991-05-25 EP EP91108511A patent/EP0515708B1/en not_active Expired - Lifetime
-
1992
- 1992-05-19 CA CA002068903A patent/CA2068903C/en not_active Expired - Fee Related
- 1992-05-22 AU AU17125/92A patent/AU1712592A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CA2068903A1 (en) | 1992-11-26 |
| EP0515708B1 (en) | 1995-02-22 |
| AU1712592A (en) | 1992-11-26 |
| ATE118849T1 (en) | 1995-03-15 |
| DK0515708T3 (en) | 1995-07-10 |
| ES2068424T3 (en) | 1995-04-16 |
| DE69107614D1 (en) | 1995-03-30 |
| EP0515708A1 (en) | 1992-12-02 |
| DE69107614T2 (en) | 1995-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |