EP0346069A2 - Improvements relating to rail clamps - Google Patents
Improvements relating to rail clamps Download PDFInfo
- 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- Withdrawn
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
- 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 asleeper 12 by means of arail chair 14. Also secured to therail 10 and abutting one end edge of therail chair 14 is adevice 40 for preventing creep of therail 10 relative to thechair 14 caused by the passage of rail traffic over therail 10. - The
device 40 comprises a generally "C" shapedmember 42 withends 48 and a second,elongate member 44 which is wedge-shaped in oneend portion 46. - The
free ends 48 of the C member are shaped to grip the respective upper surfaces of alower flange 38 of therail 10 and themember 42 is dimensioned such that when theends 48 engage theflange 38 the base of the C member is spaced from the bottom of therail 10 to receive the wedge-shaped end portion 46 of themember 44. - As can be seen from Figure 2, the wedge-
shaped end portion 46 of themember 44 is driven between therail 10 and the C member, the co-operating surface of the latter being shaped to mate with the tapered surface of theend portion 46 of themember 44 so that engagement of the latter causes themember 42 to grip therail 10 securely. - The
device 40 is positioned such that the free end of themember 44 abuts therail chair 14 to prevent it coming loose from theC 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 thechair 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 theC 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).
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)
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)
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 |
-
1989
- 1989-06-06 EP EP89305694A patent/EP0346069A3/en not_active Withdrawn
- 1989-06-08 GB GB8913169A patent/GB2219616A/en not_active Withdrawn
Patent Citations (3)
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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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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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 |
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18D | Application deemed to be withdrawn |
Effective date: 19901012 |