EP0346069A2 - Improvements relating to rail clamps - Google Patents

Improvements relating to rail clamps Download PDF

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Publication number
EP0346069A2
EP0346069A2 EP89305694A EP89305694A EP0346069A2 EP 0346069 A2 EP0346069 A2 EP 0346069A2 EP 89305694 A EP89305694 A EP 89305694A EP 89305694 A EP89305694 A EP 89305694A EP 0346069 A2 EP0346069 A2 EP 0346069A2
Authority
EP
European Patent Office
Prior art keywords
rail
chair
shaped
creep
wedge
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Withdrawn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
EP89305694A
Other languages
German (de)
French (fr)
Other versions
EP0346069A3 (en
Inventor
Brian Waddington
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.)
ISOMETAL ENGINEERING Ltd
Original Assignee
ISOMETAL 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
Priority claimed from GB888813524A external-priority patent/GB8813524D0/en
Priority claimed from GB888816882A external-priority patent/GB8816882D0/en
Application filed by ISOMETAL ENGINEERING Ltd filed Critical ISOMETAL ENGINEERING Ltd
Publication of EP0346069A2 publication Critical patent/EP0346069A2/en
Publication of EP0346069A3 publication Critical patent/EP0346069A3/en
Withdrawn legal-status Critical Current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
    • E01B9/38—Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs
    • E01B9/58—Fastening the rail in the chair
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B13/00—Arrangements preventing shifting of the track
    • E01B13/02—Rail anchors
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2201/00—Fastening or restraining methods
    • E01B2201/02—Fastening or restraining methods by wedging action
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2201/00—Fastening or restraining methods
    • E01B2201/08—Fastening or restraining methods by plastic or elastic deformation of fastener

Definitions

  • the present invention relates to devices for preventing creep of a rail of a railway track.
  • the present invention provides a device for securing a rail relative to a rail chair for inhibiting creep of said rail through said chair, the device comprising first and second members cooperable to grip securely said rail, and inhibit creep of said rail relative to said chair in a first direction axially of said rail.
  • the present invention is applicable to both bull head and flat-bottom rail tyres. In certain applications of flat-bottom rail, there is no chair present, the rail being secured directly to a sleeper.
  • the present invention applies equally to such cases and any mention of a rail chain can also be taken to relate to the case where no chain is present and the rail is connected directly to a sleeper.
  • the device includes securing means for securing said first and second members together and to said rail.
  • said device abuts said chair by way of a first of said members such that movement of said rail through said chair in a first direction increases frictional engagement of the second member with said rail to prevent said movement.
  • FIG. 10 shows a rail 10 which is secured in position on a sleeper 12 by means of a rail chair 14. Also secured to the rail 10 and abutting one end edge of the rail chair 14 is a device 40 for preventing creep of the rail 10 relative to the chair 14 caused by the passage of rail traffic over the rail 10.
  • the device 40 comprises a generally "C” shaped member 42 with ends 48 and a second, elongate member 44 which is wedge-shaped in one end portion 46.
  • the free ends 48 of the C member are shaped to grip the respective upper surfaces of a lower flange 38 of the rail 10 and the member 42 is dimensioned such that when the ends 48 engage the flange 38 the base of the C member is spaced from the bottom of the rail 10 to receive the wedge-shaped end portion 46 of the member 44.
  • the wedge-shaped end portion 46 of the member 44 is driven between the rail 10 and the C member, the co-operating surface of the latter being shaped to mate with the tapered surface of the end portion 46 of the member 44 so that engagement of the latter causes the member 42 to grip the rail 10 securely.
  • the device 40 is positioned such that the free end of the member 44 abuts the rail chair 14 to prevent it coming loose from the C member 42.
  • a further device can be positioned at the other end of the rail chair to prevent creep in the opposite direction.
  • any tendency of the rail 10 to creep throught the chair 14 in the direction of arrow A causes the C member to move with the rail and therefore only serves to increase the force exerted by the C member 42 on the rail and prevent such movement.
  • a further device can be positioned at the other end of the rail chair to prevent creep in the opposite direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Clamps And Clips (AREA)
  • Seats For Vehicles (AREA)

Abstract

A device (40) for securing a rail (10) relative to a rail chair (14) for inhibiting creep of the rail through the chair comprises first and second members (42, 44) which cooperate to grip the rail. The second member (42) is a C-shaped member the free end of which grip over upper surfaces of lower flanges of the rail. The first member (44) has a wedge-shaped end portion which engages between the C-shaped member and the rail. The other end of the first member (44) abuts the rail chair such that any tendency of the rail to creep in one direction increases the frictional engagement between the C-shaped member and the wedge-shaped portion.

Description

  • The present invention relates to devices for preventing creep of a rail of a railway track.
  • Accordingly, the present invention provides a device for securing a rail relative to a rail chair for inhibiting creep of said rail through said chair, the device comprising first and second members cooperable to grip securely said rail, and inhibit creep of said rail relative to said chair in a first direction axially of said rail.
  • The present invention is applicable to both bull head and flat-bottom rail tyres. In certain applications of flat-bottom rail, there is no chair present, the rail being secured directly to a sleeper. The present invention applies equally to such cases and any mention of a rail chain can also be taken to relate to the case where no chain is present and the rail is connected directly to a sleeper.
  • Preferably, the device includes securing means for securing said first and second members together and to said rail.
  • Advantageously, said device abuts said chair by way of a first of said members such that movement of said rail through said chair in a first direction increases frictional engagement of the second member with said rail to prevent said movement.
  • The present invention is further described hereinafter, by way of example, with reference to the accompanying drawings, in which:
    • Figure 1 is a front elevation of a railway rail having attached a first embodiment of a device according to the present invention; and
    • Figure 2 is a side elevation of the device of Figure 1.
  • Referring to the drawings, these show a rail 10 which is secured in position on a sleeper 12 by means of a rail chair 14. Also secured to the rail 10 and abutting one end edge of the rail chair 14 is a device 40 for preventing creep of the rail 10 relative to the chair 14 caused by the passage of rail traffic over the rail 10.
  • The device 40 comprises a generally "C" shaped member 42 with ends 48 and a second, elongate member 44 which is wedge-shaped in one end portion 46.
  • The free ends 48 of the C member are shaped to grip the respective upper surfaces of a lower flange 38 of the rail 10 and the member 42 is dimensioned such that when the ends 48 engage the flange 38 the base of the C member is spaced from the bottom of the rail 10 to receive the wedge-shaped end portion 46 of the member 44.
  • As can be seen from Figure 2, the wedge-shaped end portion 46 of the member 44 is driven between the rail 10 and the C member, the co-operating surface of the latter being shaped to mate with the tapered surface of the end portion 46 of the member 44 so that engagement of the latter causes the member 42 to grip the rail 10 securely.
  • The device 40 is positioned such that the free end of the member 44 abuts the rail chair 14 to prevent it coming loose from the C member 42. A further device can be positioned at the other end of the rail chair to prevent creep in the opposite direction.
  • As will be appreciated, any tendency of the rail 10 to creep throught the chair 14 in the direction of arrow A causes the C member to move with the rail and therefore only serves to increase the force exerted by the C member 42 on the rail and prevent such movement. A further device can be positioned at the other end of the rail chair to prevent creep in the opposite direction.

Claims (5)

1. A device (40) for securing a rail (10) relative to a rail chair (14) for inhibiting creep of said rail through said chair, the device comprising first and second members (44,42) cooperable to grip securely said rail, and inhibit creep of said rail (10) relative to said chair (14) in a first direction axially of said rail.
2. A device as claimed in claim 1 wherein said members (44,42) are telescopically interconnectable.
3. A device as claimed in claim 1 or 2 wherein said device (40) is arranged to abut said chair (14) by way of a first (44)of said members such that movement of said rail (10) through said chair in a first direction increases frictional engagement of the second member (42) with said rail (10) to inhibit said movement.
4. A device as claimed in claim 3 wherein said second member (42) is substantially C-shaped, free ends (48) of which member are adapted to grip respective upper surfaces of lower flanges (38) of the rail (10) , and said first member (44) has a wedge-shaped end portion frictionally engageable between said second member (42) and a lower face of said rail for engaging said free ends against said upper surfaces.
5. A device as claimed in claim 4 wherein said first member (44) is elongate and has an end opposite said wedge-shaped end portion for abutting said chair (14).
EP89305694A 1988-06-08 1989-06-06 Improvements relating to rail clamps Withdrawn EP0346069A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8813524 1988-06-08
GB888813524A GB8813524D0 (en) 1988-06-08 1988-06-08 Improvements relating to rail clamps
GB8816882 1988-07-15
GB888816882A GB8816882D0 (en) 1988-07-15 1988-07-15 Improvements relating to rail clamps

Publications (2)

Publication Number Publication Date
EP0346069A2 true EP0346069A2 (en) 1989-12-13
EP0346069A3 EP0346069A3 (en) 1990-04-11

Family

ID=26293985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89305694A Withdrawn EP0346069A3 (en) 1988-06-08 1989-06-06 Improvements relating to rail clamps

Country Status (2)

Country Link
EP (1) EP0346069A3 (en)
GB (1) GB2219616A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR447509A (en) * 1911-07-25 1913-01-08 August Johann Dinklage Device to prevent the running of railway tracks
US1585901A (en) * 1923-11-13 1926-05-25 Dinklage Raymond Rail anchor
GB573138A (en) * 1944-03-30 1945-11-07 Peter Uldall Improvements in and relating to the securing of rails in railway permanent way

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE506455A (en) * 1950-10-17
US3494555A (en) * 1968-02-23 1970-02-10 Brown Co D S Rail holddown apparatus
US4210281A (en) * 1978-09-05 1980-07-01 True Temper Corporation Spring type anchors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR447509A (en) * 1911-07-25 1913-01-08 August Johann Dinklage Device to prevent the running of railway tracks
US1585901A (en) * 1923-11-13 1926-05-25 Dinklage Raymond Rail anchor
GB573138A (en) * 1944-03-30 1945-11-07 Peter Uldall Improvements in and relating to the securing of rails in railway permanent way

Also Published As

Publication number Publication date
GB8913169D0 (en) 1989-07-26
EP0346069A3 (en) 1990-04-11
GB2219616A (en) 1989-12-13

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