EP0512758A1 - Organe de fixation de rail de chemin de fer - Google Patents

Organe de fixation de rail de chemin de fer Download PDF

Info

Publication number
EP0512758A1
EP0512758A1 EP92303940A EP92303940A EP0512758A1 EP 0512758 A1 EP0512758 A1 EP 0512758A1 EP 92303940 A EP92303940 A EP 92303940A EP 92303940 A EP92303940 A EP 92303940A EP 0512758 A1 EP0512758 A1 EP 0512758A1
Authority
EP
European Patent Office
Prior art keywords
clip
axial cross
area
passageway
rod
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Withdrawn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
EP92303940A
Other languages
German (de)
English (en)
Inventor
Barry Marshall
Trevor Paul Brown
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
Priority claimed from GB919109490A external-priority patent/GB9109490D0/en
Priority claimed from GB919117399A external-priority patent/GB9117399D0/en
Priority claimed from GB919126796A external-priority patent/GB9126796D0/en
Application filed by Pandrol Ltd filed Critical Pandrol Ltd
Publication of EP0512758A1 publication Critical patent/EP0512758A1/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Withdrawn legal-status Critical Current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
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members
    • E01B9/30—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips
    • E01B9/303—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips the clip being a shaped bar

Definitions

  • the present invention relates to a railway rail-fastening clip.
  • GB-1,510,224 discloses a rail clip, proposed by the present applicants, which has become known as an "e-clip", because when viewed from a particular direction it has in plan the shape of a letter "e".
  • Such an e-clip is formed by bending a metal rod, of length less than eighteen times its thickness, so as to have, proceeding from one end of the rod to the other, a first portion which is substantially straight, the one end of the rod constituting a free end of the first portion, a second portion which is a reverse bend, a third portion, a fourth portion which is another reverse bend, and a fifth portion, the construction of the clip being such that it can be placed in a position in which the first portion is horizontal and the third and fifth portions, when viewed from above, appear to lie on opposite sides of the first portion.
  • the first portion, or centre leg, of the clip When the clip is in use, the first portion, or centre leg, of the clip is located inside a corresponding passageway in a rail shoulder, secured to the rail foundation alongside the rail, and the fifth portion of the clip bears down on a flange of the rail itself, or, more commonly, on an insulator between the clip and the rail.
  • the e-clip was introduced by the applicants as an improvement over one of their prior rail clips disclosed in GB-861,473, known as a PR-clip, and one way in which it differed from the PR-clip was that the centre leg of the e-clip was shorter than that of the PR-clip, enabling the e-clip to be made of less material and accordingly at lower cost.
  • the e-clip lost an advantage provided by the centre leg of the PR-clip, namely that the PR-clip can be positioned accurately simply by driving the clip until the free end of the centre leg thereof abuts the closed end of the passageway in the rail shoulder.
  • a clip for fastening a railway rail to a rail foundation which clip is made of a rod of resilient material, characterised in that said clip has at least one bent portion of which the axial cross-sectional area is greater than that of the remainder of the clip.
  • Such clip may have at least one bent portion of which the axial cross-sectional area is the same as comparable prior art clips, whereas other portions of the clip are of reduced axial cross-sectional area thereby enabling a clip embodying the first aspect of the present invention to be made of less material than a comparable prior art clip, whilst maintaining the strength of the bent portion which is subject to higher stress than the other portions of the clip.
  • the or each bent portion is a portion of the clip to which an external force is applied so as to drive the clip into an associated clip anchoring device.
  • a first embodiment of the clip is approximately M-shaped in plan and has, proceeding from one end of the rod to the other, a substantially straight first part, a bent second part, a third part, a bent fourth part, a fifth part, a bent sixth part, and a substantially straight seventh part, the axial cross-sectional area of the said second and sixth parts being greater than that of the other parts of the clip.
  • a second embodiment of the clip comprises, proceeding along the rod from one end thereof to the other, a first portion which is substantially straight, the said one end of the rod constituting a free end of the said first portion, a second portion which is a reverse bend, a third portion, a fourth portion which is another reverse bend, and a fifth portion, the construction of the clip being such that it can be placed in a position in which a longitudinal axis of the first portion extends horizontally and the third and fifth portions, when viewed from above, appear to lie on opposite sides of the said first portion, wherein the axial cross-section of more than a tenth of the length of the said first portion of the clip is smaller in area than the axial cross-section of at least a region of the said second portion of the clip.
  • the area of the axial cross-section is substantially uniform along the length of the said second portion of the clip.
  • the axial cross-section of at least a part of the said first portion decreases progressively in area, proceeding from a first end of that part to a second end thereof that is closest to said free end of the said first portion, such that the said second end has a smaller axial cross-sectional area than a region of the said second portion adjacent to the said first portion.
  • said part constitutes approximately 30% of the length of the said first portion.
  • the said second end of the said part is constituted by said free end of the said first portion.
  • the said first portion extends at least partially under the said fourth portion, as viewed from above when the clip is in the said position.
  • the said metal rod before being formed into a clip having such a centre leg, may be of substantially uniform axial cross-sectional area and of length less than 18 times its thickness.
  • the axial cross-section of the said first portion decreases progressively in area along its entire length, such that the area of the axial cross-section of the first portion is smallest at the said free end thereof.
  • the first portion is such that, when said first portion is located within a passageway of an anchoring device for retaining the clip, that part of its surface which is uppermost extends substantially parallel to an upper internal surface of said passageway.
  • the axial cross-section of at least a part of one or more of the said third, fourth and fifth portions desirably undergoes a progressive reduction in area, proceeding from a first end of that part to a second end thereof that is closest to a free end of the said fifth portion, such that the said second end has a smaller axial cross-sectional area than a region of the said second portion adjacent to the said third portion.
  • the axial cross-section of at least a part of one of the said third, fourth and fifth portions undergoes such a reduction in area, the axial cross-section of the others of the said third, fourth and fifth portions being of substantially uniform area along the respective lengths of those portions.
  • a method of manufacturing a railway rail-fastening clip characterised in that said clip is a clip according to the second embodiment of the first aspect of the present invention, and in that before, after or during a process of bending a metal rod to form the said first to fifth portions of the clip, the axial cross-section of a part of that portion of the rod which is to form said first portion is reduced in area as compared to another portion of the rod which is to form said second portion, the reduction in area being achieved without loss of material from the rod and said part constituting more than a tenth of the length of said first portion of the finished clip.
  • said reduction in area is achieved by rolling the part concerned.
  • said reduction in area may be achieved by drawing out the part concerned thereby to extend and taper it.
  • an assembly for fastening a railway rail to a rail foundation comprising a railway rail-fastening clip and an anchoring device, secured to the said rail foundation alongside the rail, having a passageway therein for receiving part of the clip, one end of which passageway is closed, characterised in that said clip is a clip according to the second embodiment of the first aspect of the present invention and in that, when the assembly is in use, the said first portion of the clip is located in the passageway of the anchoring device such that the said free end of the first portion abuts the said closed end of the passageway.
  • the uppermost surface of the first portion extends parallel to the upper internal surface of the passageway, that part abuts the said upper internal surface, thereby improving the resistance of the clip to pull-out from the anchoring device.
  • a method of installing a railway rail-fastening clip in an anchoring device having a passageway with a closed end characterised in that the clip is a clip according to the second embodiment of the first aspect of the present invention and the said first portion of the clip is driven into the said passageway until the said free end of the first portion abuts the closed end of the passageway.
  • the clip shown in Figures 1 and 2 is made of a metal rod.
  • the clip comprises, proceeding along the rod from one end thereof to the other, a first portion, or centre leg, 1 which is substantially straight, a bent second portion 2, a third portion 3, a bent fourth portion 4, and a fifth portion 5.
  • the third portion 3 and fifth portion 5 lie respectively on opposite sides of the first portion 1.
  • the fourth portion 4 has a rising part 4a and a falling part 4b, such that the fourth portion 4 is substantially arched.
  • the second portion also has a rising part 2a and a falling part 2b, but the rising part 2a is inclined, with respect to the longitudinal axis of the said first portion 1, by a comparatively small angle which is less than 45°.
  • the underside of the fifth portion 5 is provided with a substantially flat surface 5a which, when the clip is in use, bears downwardly upon the flange of a rail or, more commonly, upon an insulator provided between the clip and the rail.
  • the centre leg 1 has a part 1a in the vicinity of a free end 1b thereof, which is tapered, i.e. the axial cross-section of that part progressively decreases in area, towards the free end, and extends partially under the fourth portion 4.
  • the clip of Figs. 1 and 2 may be formed of a metal rod which is of substantially uniform thickness and of length less than eighteen times its thickness.
  • Such lengthening of the centre leg enables the clip to be installed in a rail shoulder more accurately, particularly by automatic clip-driving machines, as the clip can be driven into the passageway until the free end of the lengthened centre leg abuts the closed end of the passageway.
  • a clip which embodies the first aspect of the present invention, can combine the advantages of easier and more accurate installation and cheaper cost as compared to prior art clips.
  • the centre leg of the clip may be tapered by drawing out one end of the metal rod, which is to form the clip, while it is still red hot, thereby to extend and taper that portion of the rod.
  • the reduction in area of the axial cross-section may be achieved by rolling part of the metal rod.
  • Such reduction can achieve, for example, a ten millimetre extension of the centre leg, as compared to that of an "e-clip".
  • each of these clips has a tapered centre leg 1 which is tilted such that an uppermost part 1c thereof extends in such a direction that, when the centre leg 1 is within a passageway of an anchoring device, the uppermost part 1c lies parallel to an upper internal surface, i.e. the roof, of the passageway.
  • Installation of a rail-fastening clip into an anchoring device forces the uppermost part of the centre leg 1 of the clip against the roof of the passageway.
  • the uppermost part 1c of the centre leg 1 of the clips of Figures 3 to 5 and 6 to 8 abuts the roof of the passageway along its entire length, thereby increasing the resistance of such clips to pull-out from the anchoring device.
  • the clip in each case is approximately M-shaped in plan and is made of a rod of resilient material bent so as to have, proceeding from one end of the rod to the other, a substantially straight first part 11, a bent second part 12, a substantially straight third part 13, a bent fourth part 14 which bears on a rail when the clip is in use, a substantially straight fifth part 15, a bent sixth part 16, and a substantially straight seventh part 17.
  • the clip of Figures 9a and 9b has third, fourth and fifth parts 13, 14, 15 which have respective longitudinal axes lying substantially in a first plane and first, second, sixth and seventh parts 11, 12, 16, 17 which have respective longitudinal axes lying substantially in a second plane, the first plane being inclined with respect to the second plane ( Figure 9a, dotted line) except when the clip is bearing on a rail when the first and second planes are substantially coincident (Figure 9a, unbroken line).
  • the longitudinal axes of the second and sixth parts 12, 16 of the clip of Figures 10a to 10c lie substantially in respective planes which are inclined with respect to a plane containing the first and seventh parts 11, 17, the third and fifth parts 13, 15 lying in a further plane which is above the plane containing the first and seventh parts 11, 17.
  • the second and sixth parts 12, 16, denoted by the letters a-b in Figures 9a and 9b and A-B-C in Figures 10a to 10c, are thicker in cross-section than the other parts of the clip, since the parts 12 and 16 are subject to greater stress than the remainder of the clip and must be of a particular thickness, whereas the other parts need not be so thick.
  • the invention can be applied to railway rail fastening clips made from a rod of resilient material not only of the "e-clip” type, but also of any other type where a reduction in the material required to make the clip, without consequent weakening of the clip in regions thereof subject to the highest stress, would be advantageous.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Clamps And Clips (AREA)
  • Railway Tracks (AREA)
  • Connection Of Plates (AREA)
EP92303940A 1991-05-02 1992-04-30 Organe de fixation de rail de chemin de fer Withdrawn EP0512758A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB9109490 1991-05-02
GB919109490A GB9109490D0 (en) 1991-05-02 1991-05-02 Railway rail-fastening clip
GB9117399 1991-08-12
GB919117399A GB9117399D0 (en) 1991-08-12 1991-08-12 Railway rail-fastening clip
GB919126796A GB9126796D0 (en) 1991-12-18 1991-12-18 Railway rail-fastening clip
GB9126796 1991-12-18

Publications (1)

Publication Number Publication Date
EP0512758A1 true EP0512758A1 (fr) 1992-11-11

Family

ID=27265623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92303940A Withdrawn EP0512758A1 (fr) 1991-05-02 1992-04-30 Organe de fixation de rail de chemin de fer

Country Status (9)

Country Link
EP (1) EP0512758A1 (fr)
JP (1) JPH05148802A (fr)
AU (1) AU1525292A (fr)
BR (1) BR9201623A (fr)
CA (1) CA2067323A1 (fr)
FI (1) FI921935A (fr)
GB (1) GB2255367A (fr)
NO (1) NO921699L (fr)
YU (1) YU45692A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046285A2 (fr) * 2001-11-30 2003-06-05 Vossloh-Werke Gmbh Element elastique destine a l'assemblage de rails destines a des vehicules sur rails
WO2009101457A1 (fr) * 2008-02-12 2009-08-20 Csepke Robert Aménagement pour serrer des rails sur des traverses de voie ferrée et ressort de serrage associé
US9562330B2 (en) 2012-06-12 2017-02-07 Pandrol Limited Railway rail fastening clip and pad for recessed railseats

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5735458A (en) * 1991-12-18 1998-04-07 Pandrol Limited Fastening railway rails

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510224A (en) * 1975-11-07 1978-05-10 Pandrol Ltd Railway rail fastening clip and a railway rail-and-fastening assembly employing it
DE8804426U1 (fr) * 1988-04-02 1988-05-11 Laeis Gmbh, 5500 Trier, De
DE3820243A1 (de) * 1988-06-14 1990-02-08 Vossloh Werke Gmbh Spannklemme und befestigungsanordnung fuer eisenbahnschienen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621619B1 (fr) * 1987-10-07 1990-03-02 Allevard Ind Sa Attache de fixation de rail de chemin de fer comportant des moyens d'arret de deplacement et ressort d'attache
GB2214545A (en) * 1988-01-22 1989-09-06 Clive Ernest Hereward Rail fastening assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510224A (en) * 1975-11-07 1978-05-10 Pandrol Ltd Railway rail fastening clip and a railway rail-and-fastening assembly employing it
DE8804426U1 (fr) * 1988-04-02 1988-05-11 Laeis Gmbh, 5500 Trier, De
DE3820243A1 (de) * 1988-06-14 1990-02-08 Vossloh Werke Gmbh Spannklemme und befestigungsanordnung fuer eisenbahnschienen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003046285A2 (fr) * 2001-11-30 2003-06-05 Vossloh-Werke Gmbh Element elastique destine a l'assemblage de rails destines a des vehicules sur rails
WO2003046285A3 (fr) * 2001-11-30 2004-02-19 Vossloh Werke Gmbh Element elastique destine a l'assemblage de rails destines a des vehicules sur rails
WO2009101457A1 (fr) * 2008-02-12 2009-08-20 Csepke Robert Aménagement pour serrer des rails sur des traverses de voie ferrée et ressort de serrage associé
US9562330B2 (en) 2012-06-12 2017-02-07 Pandrol Limited Railway rail fastening clip and pad for recessed railseats
US9951479B2 (en) 2012-06-12 2018-04-24 Pandrol Limited Railway rail fastening clip and pad for recessed railseats

Also Published As

Publication number Publication date
AU1525292A (en) 1992-11-05
CA2067323A1 (fr) 1992-11-03
BR9201623A (pt) 1992-12-15
GB9209328D0 (en) 1992-06-17
NO921699D0 (no) 1992-04-30
FI921935A (fi) 1992-11-03
FI921935A0 (fi) 1992-04-29
GB2255367A (en) 1992-11-04
YU45692A (sh) 1995-10-03
NO921699L (no) 1992-11-03
JPH05148802A (ja) 1993-06-15

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