EP0620317A1 - Semelles de rails - Google Patents

Semelles de rails Download PDF

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Publication number
EP0620317A1
EP0620317A1 EP94301078A EP94301078A EP0620317A1 EP 0620317 A1 EP0620317 A1 EP 0620317A1 EP 94301078 A EP94301078 A EP 94301078A EP 94301078 A EP94301078 A EP 94301078A EP 0620317 A1 EP0620317 A1 EP 0620317A1
Authority
EP
European Patent Office
Prior art keywords
pad
rail
fabric
rail pad
proceeding
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Withdrawn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
EP94301078A
Other languages
German (de)
English (en)
Inventor
Edward Winston Whittome
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.)
Pandrol Ltd
Original Assignee
Pandrol 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 Pandrol Ltd filed Critical Pandrol Ltd
Publication of EP0620317A1 publication Critical patent/EP0620317A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material
    • E01B9/683—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material layered or composite
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
    • E01B9/686—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape with textured surface
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape

Definitions

  • This invention relates to rail pads.
  • Such pads are interposed between the lower surface of a railway rail and a foundation member on which the rail stands and to which it is usually secured.
  • the rail foundation member may be a concrete or steel sleeper extending across the railway track, or a slab or plate, for example, running along the length of the rail.
  • the purpose of the rail pad is to protect the foundation member from impulsive and other loads from passing-rail traffic, to compensate for any uneveness in the foundation member, and, where the rail is electrical, to provide some electrical insulation between the rail and the foundation member.
  • Such rail pads are, from the very nature of their working disposition, subject to considerable potentially damaging forces as railway traffic passes along the rails supported by the pads, and a recurrent common problem with such pads is the damage so caused, and the inevitable need for frequent replacement at substantial cost.
  • an elastomeric rail pad of generally rectangular plan configuration having an upper face adapted to underlie the lower face of a rail, and a lower face adapted to overlie a concrete rail foundation member characterised in that the pad incorporates between the upper and lower face a fabric reinforcement layer extending throughout at least the majority of the rail pad when viewed in plan, the fabric layer having a warp and weft generally transverse one to the other.
  • the fabric is preferably a woven fabric.
  • the warp and weft of the fabric may lie generally parallel with respect to the sides of the generally rectangular plan configuration rail pad.
  • the fabric may be of any appropriate and convenient material, and thus may for example be of a manmade fibre such as nylon.
  • More than one layer of fabric may advantageously be incorporated in the body of the pad to increase the effect of the invention. Surprisingly we have found two layers to be much more effective than would be expected by simply doubling a single layer.
  • the layer of fabric reinforcement is most effective in increasing the resistance of the rail pad to displacement and/or distortion by forces imparted by the passing traffic on the overlying rail. Since this is a characteristically typical of damage caused to rail pads by passing traffic, this leads to a significant increase in the useful life of a pad.
  • the generally rectangular plan configuration of rail pads may have rectangular recesses (in plan view) along two opposed sides midway along those sides, thereby defining on each end of such recesses what can be termed "ear" portions of the pad which in use locate the pad with respect to the anchoring assembly thereof between the overlying rail and the underlying rail foundation member.
  • the fabric reinforcing layer may be extended into the wings, providing welcome additional stiffness thereto, which has a significant effect in practice in preventing movement of the pad from its required disposition between the rail and the rail support member.
  • the pad may be provided on at least one face, with a plurality of protrusions to improve the attenuation of the rail foundation member from forces exerted by the rail due to traffic passing thereacross.
  • a rail pad 1 is shown. This may be formed of a highly resilient vulcanised natural rubber (between 55 and 75 percent rebound value), or other appropriate elastomeric material having the same characteristics, such as a plastics or synthetic rubber. Desirably, the pad will be of between 50 and 90 shore A hardness.
  • the upper surface 6 of the pad is provided with a plurality of studs 2 each having a domed outer surface.
  • Such arrangement of studs has been found to increase the attenuation provided by the pad between the overlying rail and the underlying foundation member during use as a result of the passage of rail traffic.
  • the underside 3 of the pad 1 is of a plain configuration.
  • a layer of woven fabric Disposed within the pad is a layer of woven fabric. This extends through the great majority of the pad in plan apart from a peripheral portion 5 adjacent the edges thereof which effectively prevent ingress of moisture to the fabric layer.
  • the fabric is of a "square" woven nature, the weft 17 and warp 18 thereof lying parallel to respective sides 19 and 20 of the pad.
  • the material of the fabric layer 4 may be of nylon, but can be formed of other man made fibre such as a polyester, or can be a natural fabric material such as cotton. It is necessary that the fabric has good adhesion to the elastomeric material and whilst such good adhesion occurs naturally with some materials such as cotton, with other materials such as nylon, appropriate treatment, such as with resorcinol formaldehyde latex, can be carried out to ensure good adhesion of the fabric reinforcement so that in use there is no possibility of separation of the pad 1 into different layers which could otherwise lead to rapid destruction of the pad.
  • opposed sides of the pad are provided with recesses 8, 9 for engagement with the securing assembly for the overlying rail upon the underlying rail support (not shown), these recesses defining ears 10, 11 and 12, 13 at each end, and it is to be observed that the fabric reinforcement 4 extends fully into these ears, thereby providing significant stiffening to the ears, and increasing the resistance of the pad to any movement out of its required disposition within the securing assembly and under the rail and over the foundation member in use.
  • the pad is 190 mm square and of an overall thickness of 6.5 mm, whilst the recesses are typically of 84 mm in length.
  • the upper surface of the reinforcing fabric layer 4 may be at least 1 mm above the under surface 3 of the pad 1, and at least 3 mm from the upper surface 6 of the pad.
  • Figure 5 illustrates a variation of the pad of Figures 1 to 4 in which two separate fabric 14, 15 reinforcing layers, both corresponding to the reinforcing fabric layers of Figures 1 to 4, are utilised in a pad 16.
  • two reinforcing layers is surprisingly effective in providing the advantages of the invention, and in this respect is significantly more effective than simply a doubling of the effect of a single layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
EP94301078A 1993-02-16 1994-02-15 Semelles de rails Withdrawn EP0620317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939303058A GB9303058D0 (en) 1993-02-16 1993-02-16 Rail pads
GB9303058 1993-02-16

Publications (1)

Publication Number Publication Date
EP0620317A1 true EP0620317A1 (fr) 1994-10-19

Family

ID=10730497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94301078A Withdrawn EP0620317A1 (fr) 1993-02-16 1994-02-15 Semelles de rails

Country Status (2)

Country Link
EP (1) EP0620317A1 (fr)
GB (1) GB9303058D0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998041690A1 (fr) * 1997-03-14 1998-09-24 Glynwed Pipe Systems Limited Semelles de rail
WO2016042314A1 (fr) * 2014-09-15 2016-03-24 Gantry Railing Ltd Élément de rail et système de rail
WO2018060668A1 (fr) * 2016-09-30 2018-04-05 Pandrol Limited Coussinet pour ensemble de fixation de rail de chemin de fer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1506535A1 (de) * 1967-05-31 1969-07-24 Phoenix Gummiwerke Ag Schienenunterlage,insbesondere fuer Kranbahnen
DE2745220A1 (de) * 1977-10-07 1979-04-12 Peter Dipl Ing Heine Elastische schienenunterlage (fuer kranschienen)
EP0169685A2 (fr) * 1984-07-13 1986-01-29 Pandrol Limited Semelles de rails
DE8802028U1 (de) * 1988-02-17 1988-05-26 Elastogran Kunststoff-Technik GmbH, 2844 Lemförde Schwingungsisolierende Lagerplatte für Eisenbahnschienen, Kranschienen u.dgl.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1506535A1 (de) * 1967-05-31 1969-07-24 Phoenix Gummiwerke Ag Schienenunterlage,insbesondere fuer Kranbahnen
DE2745220A1 (de) * 1977-10-07 1979-04-12 Peter Dipl Ing Heine Elastische schienenunterlage (fuer kranschienen)
EP0169685A2 (fr) * 1984-07-13 1986-01-29 Pandrol Limited Semelles de rails
DE8802028U1 (de) * 1988-02-17 1988-05-26 Elastogran Kunststoff-Technik GmbH, 2844 Lemförde Schwingungsisolierende Lagerplatte für Eisenbahnschienen, Kranschienen u.dgl.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998041690A1 (fr) * 1997-03-14 1998-09-24 Glynwed Pipe Systems Limited Semelles de rail
AU723019B2 (en) * 1997-03-14 2000-08-17 Vip-Polymers Limited Rail pads
US6386461B1 (en) 1997-03-14 2002-05-14 Glynwed Pipe Systems Limited Rail pads
WO2016042314A1 (fr) * 2014-09-15 2016-03-24 Gantry Railing Ltd Élément de rail et système de rail
US10604384B2 (en) 2014-09-15 2020-03-31 Gantry Railing Ltd. Rail member and rail system
WO2018060668A1 (fr) * 2016-09-30 2018-04-05 Pandrol Limited Coussinet pour ensemble de fixation de rail de chemin de fer
CN109790690A (zh) * 2016-09-30 2019-05-21 潘得路有限责任公司 用于铁轨紧固组件的衬垫
US11248349B2 (en) 2016-09-30 2022-02-15 Pandrol Limited Pad for a railway rail fastening assembly
AU2017336570B2 (en) * 2016-09-30 2022-06-16 Pandrol Limited A pad for a railway rail fastening assembly

Also Published As

Publication number Publication date
GB9303058D0 (en) 1993-03-31

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