EP0113515A1 - Gleitplattenanordnung für eine Eisenbahnweichenzunge - Google Patents

Gleitplattenanordnung für eine Eisenbahnweichenzunge Download PDF

Info

Publication number
EP0113515A1
EP0113515A1 EP83307056A EP83307056A EP0113515A1 EP 0113515 A1 EP0113515 A1 EP 0113515A1 EP 83307056 A EP83307056 A EP 83307056A EP 83307056 A EP83307056 A EP 83307056A EP 0113515 A1 EP0113515 A1 EP 0113515A1
Authority
EP
European Patent Office
Prior art keywords
slide plate
arrangement
rail
stock rail
spring clip
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.)
Withdrawn
Application number
EP83307056A
Other languages
English (en)
French (fr)
Inventor
Stanley Herbert Brown
Kenneth William Compton
Albert William Dawkins
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.)
Thos W Ward Ltd
Thos W Ward Railway Engineering Ltd
Original Assignee
Thos W Ward Ltd
Thos W Ward Railway Engineering Ltd
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
Application filed by Thos W Ward Ltd, Thos W Ward Railway Engineering Ltd filed Critical Thos W Ward Ltd
Publication of EP0113515A1 publication Critical patent/EP0113515A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • E01B7/22—Special sleepers for switches or crossings; Fastening means therefor
    • 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
    • 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
    • E01B2202/06—Use of friction-reducing surfaces

Definitions

  • This invention relates to a slide plate arrangement for a railway switch rail, the arrangement comprising a slide plate secured to a base plate on which a stock rail can be mounted and serving to guide the slidable movement of a switch rail between open and closed positions of a railway switch or points arrangement.
  • slide plates in the form of so-called "slide chairs” or base plate, which, comprise a slide plate secured to the upper surface of a base plate which is anchored to a railway sleeper and onto which a stock rail is mounted.
  • the bottom flange of the stock rail is held-down, in well known manner, along its outer edge (with respect to the track) by rail clips which engage downwardly onto the flange and which are received by clip housings formed in the base plate.
  • the bottom flange is also held-down , along its inner edge, by a spring clip which is taken through a clip housing formed in the slide plate so as to engage with, and to apply downward pressure upon the flange of the stock rail.
  • the upper surface of the slide plate extendsto a position closely adjacent to the web of the stock rail , and over the bottom flange, and serves to guide the slidable movement of the switch rail towards and away from the stock rail during a points-change operation.
  • a special tool is required to fit the spring clip in the clip housing of the slide plate during a rail-fastening operation, and to disengage the spring clip from the stock rail , both such operations involving manual manipulation of the special tool.
  • a special tool is required which is driven by a hammer so as to urge the spring clip through the housing in the slide plate and into downward engagement with the bottom flange of the stock rail.
  • the slide plate is secured to the base plate (in that it is usually formed integrally therewith), and extends over the inside edge of the bottom flange of the stock rail, and problems are encountered during track maintenance and repair operations, when the stock rail requires to be lifted, since the stock rail must first be twisted about its longitudinal axis in order to be freed from engagement with the slide plate, even when the spring clip has been removed.
  • the second disadvantage of the known construction is that the strength of the slide plate is reduced by the necessary formation, in the slide plate, of the clip housing through which the spring clip is taken. This reduction in strength means that the remainder of the plate has to be made thicker than would be the case if the slide plate did not have a clip housing formed therein.
  • a slide plate arrangement for a railway switch rail comprising a slide plate secured to a base plate on which a stock rail can be mounted and serving to guide the slidable movement of a switch rail between open and closed positions of a railway switch arrangement, and a spring clip arrangement which is engageable with the slide plate and with an edge of the bottom flange of a stock rail in order to hold-down the stock rail onto the base plate, in which:
  • the engagement of the spring clip arrangement with the first and second parts of the slide plate does not involve the formation of a housing or through-passage for the spring clip arrangement in the parts of the slide plate , but is provided by an (external) engagement with projecting elements of the first and second parts.
  • the spring clip arrangement comprises a U-shaped spring having each limb thereof taken successively under a respective projecting lug of the first part and over a respective projecting lug of the second part, before it engages with.itsfree end downwardly onto the bottom flange of the stock rail. This arrangement avoids the weakening of the parts of the slide plate, as in the known arrangements having spring clip housings formed therein.
  • the base of the U-shaped spring clip moves to snap-fitting engagement with a seating provided in the first part of the slide plate, as the clip moves to its fastening position.
  • the spring clip arrangement is provided by a pair of clip pins which are individually driven to the rail-fastening position , each engaging with the projecting elements of the parts of the slide plate in similar manner to the limbs of the (single) U-shaped clip referred to above.
  • the second part of the slide plate is preferably formed of a high strength material, such as ductile iron made to British Standard 2789 Grade SNG 27/12. However, other high strength materials may be used , as desired.
  • either one or both parts of the slide plate may be provided with a substantially self-lubricating arrangement.
  • This may comprise the provision of a very low friction sliding surface e.g. by means of a low friction plasticscoating.
  • the sliding surface of the first and/or the second part of the slide plate may incorporate a separate low friction wear element. This wear element can be made relatively cheaply, as compared with the slide plate (so that replacement of a worn element will be much cheaper than replacement of a worn slide plate), and is arranged to bear the greater part of the frictional load as the switch rail is moved between its switched positions.
  • the wear element is made of low-friction material, such as a block made of, or incorporating a sliding surface of low friction plastics material.
  • the block is received in a mounting recess formed in the surface of the slide plate which faces, in use, the underside of the switch rail.
  • some form of resilient biasing is provided which raises the sliding surface of the wear block above the surface of the slide plate, though the block will be pressed downwardly against this biasing under the weight of the switch rail.
  • the wear element may be arranged on the slide plate and resiliently biased in such a way that the switch rail makes little or no frictional engagement with the upper surface of the slide plate proper, as it moves between its switched positions.
  • the wear element may yield progressively as the switch rail moves towards the stock rail, so that the switch rail is finally deposited on the slide plate proper at the end of its movement to the switched position.
  • the invention also includes the application of a wear element, in any one or more of its constructions referred to above, in other constructions of slide plate arrangement e.g. in the known unitary constructions of slide plate.
  • a slide plate arrangement for a railway switch rail comprising a slide plate which is designated generally by reference numeral 10 and which is secured to a base plate 11 on which a stock rail 12 can be mounted.
  • the slide plate 10 serves to guide the slidable movement of a switch rail (not shown) between open and closed positions of a'railway switch or points arrangement, with respect to the stock rail 12.
  • the base plate 11 is anchored to a sleeper (not shown) in any convenient manner, such as fasteners taken downwardly through four holes 13 provided one at each corner of the base plate 11.
  • the stock rail 12 is held-down , along the outer edge 14 of its bottom flange 15 , by a pair of rail clips 16 which engage downwardly onto the upper surface of edge 14 and which are received in rail clip housings 17 provided in the base plate 11.
  • the bottom flange 15 of the stock rail 12 is further held-down ., by downward engagement of the slide plate arrangement with the upper surface of its inside edge 18 (with respect to the track).
  • a spring clip arrangement (not shown) is provided which engages with the slide plate 10 and with the upper surface of the edge 18 in order to further hold-down the bottom flange 15 of the stock rail 12 .on the base plate 11.
  • the slide plate 10 comprises a first part 19 which is permanently secured to the base plate 11 in any convenient manner e.g. by being formed integrally therewith.
  • the slide plate 10 also comprises a second part 20. which is removably engaged with the first part 19 so as to form therewith a joint sliding surface 21 along which the under side of a switch rail is movable between. its switched positions.
  • the second part 20 extends , when engaged with the first part 19, towards the web 22 of the stock rail 12 so as to overlie the inner edge 18 of the bottom flange 15.
  • the spring clip arrangement in one embodiment, comprises a U-shaped clip which engages with the first and second parts 19, 20 of the slide plate 10, and with the upper surface of the edge 18 of bottom flange 15 of the stock rail 12, so as to maintain the first and second parts 19,20 of the slide plate in engagement with each other.
  • the second part 20 can be removed from engagement with the first part 19 in order to free the adjacent edge 18 of the bottom flange 15 of the stock rail , to facilitate lifting of the latter in a "straight- lift". i.e. without any prior twisting of the stock rail about its longitudinal axis, upon disengagement of the spring clip arrangement from the parts 19, 20 of the slide plate 10 and from the stock rail 12.
  • the engagement of the spring clip arrangement with the first and second parts 19,20 of the slide plate does not involve the formation of a housing or through-passage for the spring clip arrangement in the parts of the slide plate, but is provided by an external type engagement with projecting elements of the first and second parts.
  • the U-shaped spring clip has each limb thereof taken successively under a respective laterally projecting lug 23 of the first part 19 and over a respective laterally projecting lug 24 of the second part 19 before it engages with its free end downwardly onto the upper surface of. inside edge 18 of the bottom flange 15 of the stock rail.
  • This external type of engagement between the spring clip arrangement and the slide plate 10 avoids any weakening of the parts of the slide plate, as in the known arrangements having spring clip housings formed therein.
  • the base of the U-shaped spring clip moves to snap -fitting engagement with a U-shaped (as seen in plan) seating 25 provided at the right-hand end of the first part 19.
  • the spring clip is maintained in position, once the free ends of the pair of limbs of the clip have moved to engagement with the bottom flange of the stock rail.
  • the spring clip arrangement is provided by a pair of clip pins (not shown) which are individually driven to the rail-fastening position, each engaging with the projecting elements of the parts 19 and 20 of the slide plate 10, in similar manner to the limbs of the unitary construction of U-shaped clip referred to above.
  • the base plate 11 may be formed in any suitable material , preferably any of the conventional materials used in railway switch arrangements e.g. cast iron.
  • the first part 19 of the slide plate 10 will preferably be fabricated at the same time as the base plate 11, but the second part 20 of the slide plate is formed as a removable component which is fabricated separately.
  • the part 20 is preferably. fabricated from high strength material, such as ductile iron made to British Standard 2789 Grade SNG 27/12.
  • either one or both of the parts 19,20 of the slide plate may be provided with a substantially self-lubricating arrangement.
  • This may comprise the provision of a very low.friction sliding surface e.g. by means of a low friction plastics coating.
  • the sliding surface of the first part 19 and/or the second part 20 of the slide plate may incorporate a separate low friction wear element. This wear element can be made relatively cheaply, compared with the slide plate, and is arranged-to bear the greater part of the frictional load as the switch rail is moved between its switched positions.
  • the wear element may be made of low friction material, such as a block made of, or incorporating a sliding surface of low friction plastics material, which is received in a mounting recess formed in the surface of the slide plate which faces, in use, the underside of the switch rail.
  • some form of resilient biasing may be provided which raises the sliding surface of the wear block above the surface of the slide plate, though the block will be pressed downwardly against this biasing under the weight of the switch rail.
  • the wear element may be arranged on the slide plate and resiliently biased in such a way that the switch rail makes little or no frictional engagement with the upper surface of the slide plate proper, as it moves between its switched positions.
  • the wear element may be arranged to yield progressively as the switch rail moves towards the stock rail , so that the switch rail is finally deposited on the slide plate proper at the end of its movement to the switched position.
  • a wear element in any one or more of its constructions referred to above, may be provided in other constructions of slide plate arrangement, including the known unitary constructions of slide plate referred to in .the introduction to the.specification..
  • slide plate arrangement described above with reference to the drawings provides an easy-to-assemble construction, which is also easy to disassemble and enables the stock-rail to be lifted easily during track maintenance and repair operations.
  • This is a significant technical advantage over the known constructions, in which prior pivoting of the stock rail about its longitudinal axis is necessary before it can become freed from the parts of the known slide plate arrangements which overlie the bottom flange of the stock rail.
  • the construction as illustrated in the drawings, also avoids the necessity to weaken the slide plate by formation of any spring clip housing in the slide plate, as in the known constructions.
  • FIG. 3 and 4 An alternative arrangement of slide plate is shown in Figures 3 and 4, which is designed for use with a pair of separate spring clip pins, rather than the U-shaped clip for which, the arrangement of Figures 1 and 2 has been designed. Parts corresponding with Figures 1 and 2 are designated by the same reference numerals, and will not be described in detail again.
  • the construction of the second part 20 remains.substantially the same.
  • the first part (19a) is slightly modified so as to receive individual clip pins, and to retain such pins in position after being driven to latching.engagement with the parts 20 (by bearing down onto the lugs 24). Therefore, clip passages 26 are defined under lateral projections 27 of the first part 19a, .each of which receives a respective clip pin (not shown).
  • Each clip pin is driven over.the respective lug 24 until it engages downwardly onto the upper surface of the edge 18 of the flange 15 of the rail 12. The clip exerts downward pressure onto the lug 24 to retain the second part 20 in engagement with the first part 19a, and adjacent to the edge of the bottom flange of the stock rail.
  • Each clip is.retained in its driven position by its inherent resilience, reacting between the roof of the passage 26, the lug 24 and the upper surface of the bottom flange of the rail.
  • any of the spring clip arrangements should engage downwardly with their free ends onto the bottom flange 15 of the stock rail 12. This then enables the second part 20 to be primarily concerned with functioning as a slide on which a switch rail can be moved up to the stock rail.
  • the second part 20 need not be arranged to provide any significant downward holding action on the bottom flange of the stock rail. Indeed, it is preferred that the second part should exert no downward action, or only minimal downward action, on the bottom flange of the stock rail, so that no appreciable stresses can be generated in the second part via the stock rail.
  • slide plate arrangement described herein may be modified, if desired, so that the second part of the slide plate does, in fact, exert appreciable downward locating action on the bottom flange of the stock rail, to supplement the downward action provided by the spring clip arrangement.
  • slide plate and the spring clip arrangement may be modified in such a way that the spring clip arrangement exerts downward action only onto the second part 20 of the slide plate, and the second part 20 applies the necessary downward locating action onto the bottom flange 15.of the stock rail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
EP83307056A 1982-12-02 1983-11-18 Gleitplattenanordnung für eine Eisenbahnweichenzunge Withdrawn EP0113515A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8234448 1982-12-02
GB8234448 1982-12-02

Publications (1)

Publication Number Publication Date
EP0113515A1 true EP0113515A1 (de) 1984-07-18

Family

ID=10534707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83307056A Withdrawn EP0113515A1 (de) 1982-12-02 1983-11-18 Gleitplattenanordnung für eine Eisenbahnweichenzunge

Country Status (1)

Country Link
EP (1) EP0113515A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232726A2 (de) * 1986-01-14 1987-08-19 Magna Holding Anstalt Gleitstuhl für eine Schienenweiche
EP0336311A1 (de) * 1988-04-05 1989-10-11 BWG Butzbacher Weichenbau GmbH Vorrichtung zum Befestigen von Schienen
GB2255997A (en) * 1991-05-18 1992-11-25 Rehau Ag & Co Slide chair in a rail switch
WO2005047600A1 (de) * 2003-11-12 2005-05-26 Armin Heim Vorrichtung zur befestigung von backenschienen in weichen
CN103132399A (zh) * 2013-03-19 2013-06-05 中国铁建重工集团有限公司 用于铁路活动心轨辙叉的滑动构件
CN103924488A (zh) * 2014-03-12 2014-07-16 中铁宝桥集团有限公司 城市轨道交通道岔尖轨及制作工艺
CN103924487A (zh) * 2014-03-12 2014-07-16 中铁宝桥集团有限公司 道岔转辙器滚轮安装装置及工作方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7148502U (de) * 1900-01-01 Schreck-Mieves Kg Vorrichtung zum Befestigen von Backen schienen in Weichen
DE1716338U (de) * 1954-10-29 1956-02-09 Bundesbahn Bundesbahn Zentrala Gleitstuhlplatte fuer eisenbahnweichen.
DE7037186U (de) * 1970-10-08 1971-01-28 Krupp F Huettenwerke Ag Backenschienenbefestigung in weichen
DE7538525U (de) * 1975-12-03 1976-09-30 Rheinstahl Ag, 4300 Essen Vorrichtung zum befestigen von backenschienen in weichen
DE2631594B1 (de) * 1976-07-14 1977-12-29 Wilfried Ensinger Kunststoffgleitbelag fuer Schienenweichen
DE2729723A1 (de) * 1977-07-01 1979-01-18 Koellmann U Vorlaender Fa Rippenplatte mit gleitstuhl und verfahren zu deren herstellung
EP0011285A1 (de) * 1978-11-18 1980-05-28 Wilfried Ensinger Kunststoffgleitbelag für Schienenweichen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7148502U (de) * 1900-01-01 Schreck-Mieves Kg Vorrichtung zum Befestigen von Backen schienen in Weichen
DE1716338U (de) * 1954-10-29 1956-02-09 Bundesbahn Bundesbahn Zentrala Gleitstuhlplatte fuer eisenbahnweichen.
DE7037186U (de) * 1970-10-08 1971-01-28 Krupp F Huettenwerke Ag Backenschienenbefestigung in weichen
DE7538525U (de) * 1975-12-03 1976-09-30 Rheinstahl Ag, 4300 Essen Vorrichtung zum befestigen von backenschienen in weichen
DE2631594B1 (de) * 1976-07-14 1977-12-29 Wilfried Ensinger Kunststoffgleitbelag fuer Schienenweichen
DE2729723A1 (de) * 1977-07-01 1979-01-18 Koellmann U Vorlaender Fa Rippenplatte mit gleitstuhl und verfahren zu deren herstellung
EP0011285A1 (de) * 1978-11-18 1980-05-28 Wilfried Ensinger Kunststoffgleitbelag für Schienenweichen

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232726A2 (de) * 1986-01-14 1987-08-19 Magna Holding Anstalt Gleitstuhl für eine Schienenweiche
EP0232726A3 (en) * 1986-01-14 1988-09-28 Magna Holding Anstalt Slide plate for railway points
EP0336311A1 (de) * 1988-04-05 1989-10-11 BWG Butzbacher Weichenbau GmbH Vorrichtung zum Befestigen von Schienen
GB2255997A (en) * 1991-05-18 1992-11-25 Rehau Ag & Co Slide chair in a rail switch
GB2255997B (en) * 1991-05-18 1994-11-16 Rehau Ag & Co Slide chair in a rail switch
WO2005047600A1 (de) * 2003-11-12 2005-05-26 Armin Heim Vorrichtung zur befestigung von backenschienen in weichen
CN103132399A (zh) * 2013-03-19 2013-06-05 中国铁建重工集团有限公司 用于铁路活动心轨辙叉的滑动构件
CN103132399B (zh) * 2013-03-19 2015-07-08 中国铁建重工集团有限公司 用于铁路活动心轨辙叉的滑动构件
CN103924488A (zh) * 2014-03-12 2014-07-16 中铁宝桥集团有限公司 城市轨道交通道岔尖轨及制作工艺
CN103924487A (zh) * 2014-03-12 2014-07-16 中铁宝桥集团有限公司 道岔转辙器滚轮安装装置及工作方法
CN103924487B (zh) * 2014-03-12 2016-04-27 中铁宝桥集团有限公司 道岔转辙器滚轮安装装置及工作方法
CN103924488B (zh) * 2014-03-12 2016-07-13 中铁宝桥集团有限公司 城市轨道交通道岔尖轨及制作工艺

Similar Documents

Publication Publication Date Title
EP0113515A1 (de) Gleitplattenanordnung für eine Eisenbahnweichenzunge
US8181887B2 (en) Device for positionally securing and guiding rails for railway tracks
CA1110044A (en) Molding fabrication of concrete railroad overpasses
KR950003620B1 (ko) 철도 전철기(railway switch) 또는 철도 교차로용 미끄럼 고정쇠, 미끄럼판, 및 보강판
US4981264A (en) Device for fixing stock rails in railway switches as well as process for fixing stock rails by means of such device
US4600145A (en) Railroad sleeper lock-in shoulder
US2535337A (en) Rail fastening device
US5127613A (en) Rail switching device including an antifriction insert
US2107131A (en) Railway tie plate and retaining clip
US4448350A (en) Railroad track stress transfer apparatus
US4424935A (en) Spring rail fastener
US5820021A (en) Resilient railway fastening clip resisting loosening or removal
JP2530364B2 (ja) 鉄道線路及び転轍器のレ―ルを枕木に固定するための土台板
US4405081A (en) Rail fastener with gauge adjustment
GB968128A (en) A new or improved fastening for securing flange footed railway rails to sleepers
EP0703317B1 (de) Rollvorrichtung
US2215104A (en) Rail fastener and tie plate
GB2063338A (en) Resilient rail fastening members for concrete sleepers
WO2006036088A2 (fr) Attache de rails
US2713974A (en) Cushioned tie plate
EP0889169A1 (de) Befestigungsvorrichtung für schienen im schienenverkehr auf holzschwellen
US2127447A (en) Rail chair or base plate
US2648500A (en) Rail fastening device
US1006054A (en) Rail-fastener.
US2815902A (en) Two-piece rail anchor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850319

RIN1 Information on inventor provided before grant (corrected)

Inventor name: COMPTON, KENNETH WILLIAM

Inventor name: BROWN, STANLEY HERBERT

Inventor name: DAWKINS, ALBERT WILLIAM