EP0161786A1 - System for securing a railway rail to a railway sleeper - Google Patents
System for securing a railway rail to a railway sleeper Download PDFInfo
- Publication number
- EP0161786A1 EP0161786A1 EP85302459A EP85302459A EP0161786A1 EP 0161786 A1 EP0161786 A1 EP 0161786A1 EP 85302459 A EP85302459 A EP 85302459A EP 85302459 A EP85302459 A EP 85302459A EP 0161786 A1 EP0161786 A1 EP 0161786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- yoke
- baseplate
- railway
- base plate
- 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- Withdrawn
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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
- E01B9/44—Fastening the rail on the tie-plate
- E01B9/46—Fastening the rail on the tie-plate by clamps
- E01B9/48—Fastening the rail on the tie-plate by clamps by resilient steel clips
- E01B9/486—Fastening the rail on the tie-plate by clamps by resilient steel clips the clip being a shaped plate
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B23/00—Easily dismountable or movable tracks, e.g. temporary railways; Details specially adapted therefor
- E01B23/02—Tracks for light railways, e.g. for field, colliery, or mine use
- E01B23/04—Fastening or joining means
Definitions
- the present application relates to the securing of a railway rail to a railway sleeper particularly by means of a spring clip and a baseplate.
- ATC asymmetrical trapped conventional
- a system for securing a railway rail to a railway sleeper which comprises a baseplate and two spring clips, the baseplate including a central region arranged to receive the rail and on each side of the central region a lateral region, each lateral region having a yoke adjacent the central region and a generally planar portion extending away from the yoke, each spring clip being so dimensioned to extend beneath the yoke and to engage the flange of the rail, the undersurface of the yoke and the planar portion of the lateral portion of the base plate.
- this fastening assembly can be very easily assembled or taken apart 'in situ'. It also offers the distinct advantage of being a very low assembly, thereby enabling other moving or fixed components to use or be attached to the rail without obstruction.
- the under-rail height is very small and it has been found that the system can provide high toe loads and good creep properties. It is therefore particularly suitable in applications involving either ATC rail used in mines or rail trackwork switches, crossings and turnouts.
- the sleeper may be of any type such as concrete, metal or timber, and the baseplate may be attached to it by any suitable means such as bolts screws or nails.
- the baseplate may have holes or other facilities enabling it to be screwed to timber ties or sleepers or otherwise suitably fixed to steel or other sleepers or trackway bases.
- the baseplate is of mild steel and pressed to shape as a single component.
- the yoke on each side is formed by an inverted-L raised section or an upward fold in the baseplate parallel with the intended position of the rail, and a slot on each side of the fold defining the yoke.
- the slot length is preferably only marginally longer than the width of the spring clip so as to prevent any tendency for the clip to twist horizontally.
- the underside of the top length of one or both slots may act as the reaction point to the upper surface of the assembled clip.
- each end of the baseplate has a turned-up portion.
- This turned-up portion may act as a 'positive lock' confirming when the clip is in the correctly assembled position.
- each spring clip is of spring steel and is preferably generally chevron-shaped so that one end terminates in a V while at the other end there is a corresponding V cut out to define two toes.
- the V-end and the two toes are turned up to facititate assembly through the baseplate slots and on to the rail foot.
- the spring clip may be rectangular, the chevron shape is preferred since it can enable the spring clip to absorb higher stresses safely and can accommodate slight mis-alignments of the rail and clip.
- the clip may be suitably shaped to ensure that the correct toe load pressure is applied to the rail foot when components are fully assembled.
- a rail 11 is secured to a sleeper 12 by means of a baseplate 13 and a pair of spring clips 14.
- the rail 11 is generally I-shaped in section but is asymmetrical. Thus it has two similar flanges 15 constituting the rail foot but the head section comprises a short thick inner rail head 16 and athinner elongated outer rail head 17.
- the baseplate 13 shown in Figures 1 and 3 is of mild steel and generally rectangular in shape. It has a central portion 21, whose width is the same or a little greater than that of the rail foot 15, 15; on each side, of the central portion 21, an inverted U-section fold 22, and beyond the folds 22 a generally planar extension 23. Each fold 22 has a pair of parallel slots 24 one in each inclined face. The central part 25 at the end of each extension 23 is turned upwards and two holes 26 are formed in each extension 23 to receive bolts (not shown) to attach the baseplate 13 to the sleeper 12.
- the spring clip 14 is a generally flate chevron-shaped plate of spring steel as shown in Figure 2.
- the clip comprises a pair of toes 31,32 defined by a V-shaped cut-out and a heel 33 in the form of a correspondingly V-shaped protrusion.
- the ends 34 of the toes 31,32 and heel 33 are upturned.
- the complementary nature of the V-shapes minimises material wastage in forming the plates.
- the baseplate 13 is suitably secured to the positioned sleeper 12 and the rail 11 is positioned correctly on the central portion 21 of the baseplate 13.
- One end of a clip 14 is then introduced through the baseplate slots 24 to rest on the rail flange 15.
- the rear end of the clip 14 is driven by a hammer or some other means up over the turned-up central part 25 of the baseplate end, and is thus prevented from returning by this central part 25.
- Tension is produced within the clip 14 between this point, the reaction point at the underside of the inverted U 22 between the two slots and the contact point of the clip 14 with the rail flange 15, this tension ensures the correct toe load is applied on the rail flange 15. This is then repeated with the other clip 14 on the other side of the baseplate 13.
- a suitably shaped lever is located on end of the clip 14 at the rail foot and against the rail head and pressure is applied to the clip end to drive the clip 14 out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
A system for securing a railway rail (11) to a railway sleeper (12) which comprises a base plate (13) and two spring clips (14). The rail (11) is received in a central portion (21) of the base plate. The spring clips (14) are generally chevron shaped and extend through a yoke defined on either side of the base plate (14) so that two toes of the chevron (31, 32) engage the rail flange (15) while the heel (33) of the chevron engages the base plate.
Description
- The present application relates to the securing of a railway rail to a railway sleeper particularly by means of a spring clip and a baseplate.
- In certain railway applications, e.g. in mines, conventional symmetrical section rails are being replaced by "asymmetrical trapped conventional" (ATC) rails which have an elongated outer rail-head section. This form of section enables rail vehicles to employ brake mechanisms which run alongside and beneath the elongated section and which"grip" this section when the brakes are applied.
- However, conventional systems for securing the rails to the sleepers are frequently unsuitable since the clips extend upwards too far and so tend to foul the braking mechanism.
- It is therefore an object of the present invention to provide a system for attaching a rail to a sleeper which does not foul a braking mechanism which acts directly on the rail.
- It is a further object of the invention to provide such a system which may be easily assembled and disassembled.
- According to the invention there is provided a system for securing a railway rail to a railway sleeper which comprises a baseplate and two spring clips, the baseplate including a central region arranged to receive the rail and on each side of the central region a lateral region, each lateral region having a yoke adjacent the central region and a generally planar portion extending away from the yoke, each spring clip being so dimensioned to extend beneath the yoke and to engage the flange of the rail, the undersurface of the yoke and the planar portion of the lateral portion of the base plate.
- Being totally above the sleeper, this fastening assembly can be very easily assembled or taken apart 'in situ'. It also offers the distinct advantage of being a very low assembly, thereby enabling other moving or fixed components to use or be attached to the rail without obstruction. Thus, the under-rail height is very small and it has been found that the system can provide high toe loads and good creep properties. It is therefore particularly suitable in applications involving either ATC rail used in mines or rail trackwork switches, crossings and turnouts.
- The sleeper may be of any type such as concrete, metal or timber, and the baseplate may be attached to it by any suitable means such as bolts screws or nails. Thus the baseplate may have holes or other facilities enabling it to be screwed to timber ties or sleepers or otherwise suitably fixed to steel or other sleepers or trackway bases.
- Preferably, the baseplate is of mild steel and pressed to shape as a single component. Thus, preferably, the yoke on each side is formed by an inverted-L raised section or an upward fold in the baseplate parallel with the intended position of the rail, and a slot on each side of the fold defining the yoke. The slot length is preferably only marginally longer than the width of the spring clip so as to prevent any tendency for the clip to twist horizontally. The underside of the top length of one or both slots may act as the reaction point to the upper surface of the assembled clip.
- Preferably, each end of the baseplate has a turned-up portion. This turned-up portion may act as a 'positive lock' confirming when the clip is in the correctly assembled position.
- Preferably, each spring clip is of spring steel and is preferably generally chevron-shaped so that one end terminates in a V while at the other end there is a corresponding V cut out to define two toes. Preferably, the V-end and the two toes are turned up to facititate assembly through the baseplate slots and on to the rail foot. Although the spring clip may be rectangular, the chevron shape is preferred since it can enable the spring clip to absorb higher stresses safely and can accommodate slight mis-alignments of the rail and clip.
- Dependent upon the rail section and baseplate length, the clip may be suitably shaped to ensure that the correct toe load pressure is applied to the rail foot when components are fully assembled.
- The invention may be carried into practice in various ways and one embodiment will now be described by way of example with reference to the accompanying drawings in which :-
- Figure 1 is a vertical section through an assembled system in accordance with the invention,
- r Figure 2 is a plan view of the right hand spring clip shown in Figure 1; and
- Figure 3 is a plan view of a baseplate.
- As shown in Figure 1, a
rail 11 is secured to asleeper 12 by means of abaseplate 13 and a pair ofspring clips 14. Therail 11 is generally I-shaped in section but is asymmetrical. Thus it has twosimilar flanges 15 constituting the rail foot but the head section comprises a short thickinner rail head 16 and athinner elongatedouter rail head 17. - The
baseplate 13 shown in Figures 1 and 3 is of mild steel and generally rectangular in shape. It has acentral portion 21, whose width is the same or a little greater than that of therail foot central portion 21, an invertedU-section fold 22, and beyond the folds 22 a generallyplanar extension 23. Eachfold 22 has a pair ofparallel slots 24 one in each inclined face. Thecentral part 25 at the end of eachextension 23 is turned upwards and twoholes 26 are formed in eachextension 23 to receive bolts (not shown) to attach thebaseplate 13 to thesleeper 12. - The
spring clip 14 is a generally flate chevron-shaped plate of spring steel as shown in Figure 2. The clip comprises a pair oftoes heel 33 in the form of a correspondingly V-shaped protrusion. Theends 34 of thetoes heel 33 are upturned. The complementary nature of the V-shapes minimises material wastage in forming the plates. - To effect assembly, the
baseplate 13 is suitably secured to the positionedsleeper 12 and therail 11 is positioned correctly on thecentral portion 21 of thebaseplate 13. One end of aclip 14 is then introduced through thebaseplate slots 24 to rest on therail flange 15. The rear end of theclip 14 is driven by a hammer or some other means up over the turned-upcentral part 25 of the baseplate end, and is thus prevented from returning by thiscentral part 25. Tension is produced within theclip 14 between this point, the reaction point at the underside of the invertedU 22 between the two slots and the contact point of theclip 14 with therail flange 15, this tension ensures the correct toe load is applied on therail flange 15. This is then repeated with theother clip 14 on the other side of thebaseplate 13. - In order to remove the
spring clip 14 from the assembled position shown in Figure 1, a suitably shaped lever is located on end of theclip 14 at the rail foot and against the rail head and pressure is applied to the clip end to drive theclip 14 out.
Claims (7)
1. A system for securing a railway rail (11) to a railway sleeper (12) which comprises a base plate (13) having a central region (21) arranged to receive a rail (11) and two spring clips (14) arranged to engage the rail flange (15) on either side of the rail (11), characterised in that the baseplate (13) has a lateral region on either side of the central region (21), each lateral region having a yoke (22,24) adjacent the central region (21) and a generally planar portion (23) extending away form the yoke (22,24), each spring clip (14) being so dimensioned to extend beneath the yoke (22,24) and to engage the flange (15) at the rail, the undersurface of the yoke (22,24) and the planar portion (23) of the lateral portion of the base plate (13).
2. A system as claimed in Claim 1 characterised in that the baseplate (13) is of mild steel and pressed to shape as a single component.
3. A system as claimed in Claim 1 or Claim 2 characterised in that the yoke on each side is formed by an inverted U raised section or an upward fold 22 in the baseplate extending parallel with the intended position of the rail (11), and a slot (24) on each side of the fold (22) defining the yoke.
4. A system as claimed in Claim 3 characterised in that the slot length is only marginally longer than the width of the spring clip 14.
5. A system as claimed in any preceding claim characterised in that each end of the baseplate (13) has an up turned portion (25).
6. A system as claimed in any preceding claim characterised in that each spring clip (14) is of spring steel and is generally chevron shaped with one end terminating in a V (33) and the other end having a corresponding cut out to define two toes (31,32).
7. A system as claimed in Claim 6 characterised in that the ends (34) of the V shape (33) and the toes (31,32) are up turned.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB848409237A GB8409237D0 (en) | 1984-04-10 | 1984-04-10 | Securing railway sleeper |
GB8409237 | 1984-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0161786A1 true EP0161786A1 (en) | 1985-11-21 |
Family
ID=10559467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85302459A Withdrawn EP0161786A1 (en) | 1984-04-10 | 1985-04-09 | System for securing a railway rail to a railway sleeper |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0161786A1 (en) |
GB (2) | GB8409237D0 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994028245A1 (en) * | 1993-06-02 | 1994-12-08 | Jude Odihachukwunma Igwemezie | Improved rail tie, tie plate and clip |
US5782406A (en) * | 1993-06-02 | 1998-07-21 | Igwemezie; Jude O. | Rail tie plate clips and shoulders |
US6305613B1 (en) | 1995-01-13 | 2001-10-23 | Jude O. Igwemezie | Rail fastening devices |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1925717A (en) * | 1931-01-10 | 1933-09-05 | Faries Robert | Rail retaining member |
US2118100A (en) * | 1936-11-11 | 1938-05-24 | Henry C Myer | Tie plate and rail fastener |
US2547839A (en) * | 1947-06-05 | 1951-04-03 | United States Steel Corp | Rail fastening device |
DE2921720A1 (en) * | 1978-05-30 | 1979-12-20 | Hixson Richard M | DEVICE FOR FASTENING RAILWAY TRACKS ON SLEEPERS |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1042991A (en) * | 1964-03-05 | 1966-09-21 | British Railways Board | Improvements relating to rail fastenings |
GB1169715A (en) * | 1966-08-16 | 1969-11-05 | British Railways Board | Improvements relating to Rail Fastenings |
FR2466566A1 (en) * | 1979-10-02 | 1981-04-10 | Ressorts Ind | NEW DEVICES FOR THE ELASTICAL FASTENING OF RAILWAY RAIL BY LATCHING |
GB2129470B (en) * | 1982-11-01 | 1986-04-16 | Alan Walter Briggs | Rail sleeper and fastening |
-
1984
- 1984-04-10 GB GB848409237A patent/GB8409237D0/en active Pending
-
1985
- 1985-04-09 GB GB08509082A patent/GB2157348A/en not_active Withdrawn
- 1985-04-09 EP EP85302459A patent/EP0161786A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1925717A (en) * | 1931-01-10 | 1933-09-05 | Faries Robert | Rail retaining member |
US2118100A (en) * | 1936-11-11 | 1938-05-24 | Henry C Myer | Tie plate and rail fastener |
US2547839A (en) * | 1947-06-05 | 1951-04-03 | United States Steel Corp | Rail fastening device |
DE2921720A1 (en) * | 1978-05-30 | 1979-12-20 | Hixson Richard M | DEVICE FOR FASTENING RAILWAY TRACKS ON SLEEPERS |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994028245A1 (en) * | 1993-06-02 | 1994-12-08 | Jude Odihachukwunma Igwemezie | Improved rail tie, tie plate and clip |
US5782406A (en) * | 1993-06-02 | 1998-07-21 | Igwemezie; Jude O. | Rail tie plate clips and shoulders |
US6305613B1 (en) | 1995-01-13 | 2001-10-23 | Jude O. Igwemezie | Rail fastening devices |
Also Published As
Publication number | Publication date |
---|---|
GB8509082D0 (en) | 1985-05-15 |
GB2157348A (en) | 1985-10-23 |
GB8409237D0 (en) | 1984-05-23 |
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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): DE FR IT |
|
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: 19860722 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MARSHALL, BARRY |