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
• • 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
  • E01B9/483—Fastening the rail on the tie-plate by clamps by resilient steel clips the clip being a shaped bar

Definitions

• the present invention relates to a railway rail fastening clip.
• the clip 90 is made of a rod of metal bent so as to have, proceeding along the rod from one end thereof to the other end, firstly a substantially straight first portion 10, then a bent second portion 20, then a substantially straight third portion 30 the axis of which makes an angle substantially more than
• the fifth and seventh portions 50, 70 appear to be on opposite sides of the third portion 30.
• the clip 90 In use on a timber sleeper 100 the clip 90 is placed so that the seventh portion 70 rests on a foot
• the first portion 10 projects into a blind round hole 140 in the sleeper 100, and a screwspike 130 is inserted between the third and fifth portions 30, 50 into the sleeper 100.
• the clip 90 is retained in a position in which the toe 70 of the clip 90 bears on the rail foot 120 to hold down the rail 110 and lateral parts of the second and third portions 20, 30 of the clip 90 contact the edge of ⁇ -he rail foot 120 so as ensure gauge retention, i.e. so as to prevent sideways movement of the rail 110.
• the applicants have now identified improvements which may be made to such a clip 90.
• the hole 140 in the sleeper 100 into which the first portion 10 is inserted must be drilled slightly larger than the diameter of the first portion 10 (for example with a diameter of 15mm to accommodate a first portion 10 of 14mm diameter) so as to avoid the so- called “pneumatic effect" which can cause difficulty in entering the first portion 10 into the blind hole 140 and when extracting the first portion 10 of the clip 90 from the hole 140 during a track de-stressing operation.
• the first portion 10 should ideally be more close fitting in the hole 140 so as to control lateral movement_ of the- rail foot 120.
• a resilient railway rail fastening clip the clip being a rod of metal which has been bent so as to have, proceeding along the rod from one end of it to the other end, firstly a substantially straight first portion, then a bent second portion, then a substantially straight third portion the axis of which makes an angle substantially more than 45° with the axis of the first portion, the two axes lying in the same plane as one another, then a fourth portion which is a reverse bend, then a fifth portion, then a sixth portion which is another reverse bend and finally a seventh portion, the construction being such that it is possible to place the clip in a particular position such that the third portion is horizontal and the first portion extends downwardly and such thai-, when the clip is viewed from above the fifth and seventh portions appear to be on opposite sides of the third portion, characterised in that the first portion is formed so as to comprise a region having a generally cylindrical surface extending along its entire length and a longitudinally-extending part having a surface which is less
• Manufacturing the first portion of the clip in this manner removes the pneumatic resistance and allows the first portion of the clip to be inserted into, and extracted from, a blind hole in the sleeper more easily.
• the surface of the longitudinally- extending part is substantially flat.
• the surface of the longitudinally- extending part is concave.
• the rod forming the clip has a generally circular cross-section.
• the second and third portions of the prior art clip therefore make only line contact with the flat edge of the rail, as a consequence of which the contact pressures are high and premature wear takes place, generating a flat on the clip in these regions and consequently causing some slight gauge widening.
• At least part of the second portion and at least part of the third portion are manufactured so as to have substantially flat surfaces on respective lateral regions thereof which contact the rail when the clip is in use.
• the substantially flat surface of the second portion is contiguous with the substantially flat surface of the third portion.
• Figures 1 and 2 show a prior art railway rail fastening assembly
• Figures 3 to 7 show respective perspective, plan, side elevational, front elevational and rear elevational views of a resilient railway rail fastening clip embodying the present invention
• Figure 8 shows a perspective, partially cut-away view of part of a railway rail fastening assembly incorporating a clip embodying the present invention
• Figures 9(A) to 9(D) are views for use in explaining a method of making a clip embodying the present invention.
• FIG. 10 shows an alternative clip embodying the present invention.
• a resilient railway rail fastening clip 9 embodying the present invention is formed from a rod of metal so as to comprise, proceeding from one end A of the rod to the other end B of the rod, a substantially straight first portion 1, a bent second portion 2, a substantially straight third portion 3, a bent fourth portion 4, a fifth portion 5, a bent sixth portion 6 and a seventh portion 7 forming the toe of the clip 9.
• the longitudinal axes of the first portion 1 and the third portion 3 lie in the same plane, the axis of the third portion 3 making an angle with the axis of the first portion 1.
• the angle c- is 90°, but ⁇ could be any angle substantially more than 45°.
• the clip 9 is held down such that the toe of the clip bears on the rail foot 12 by a screwspike 13 screwed into the timber sleeper 15, the head of which screwspike 13 bears on the third and fifth portions 3, 5 of the clip.
• the clip 9 is manufactured so as to have on the first portion 1 a region having a generally cylindrical surface IB extending along its entire length and a longitudinally-extending part 1A having a surface which is less' convex than the generally cylindrical surface region IB.
• the longitudinally- extending part comprises a flat face 1A.
• the clip 9 is also manufactured in this embodiment so as to have a flat face 2A on the second portion 2 and a flat face 3A on the third portion 3, the flat faces 2A and 3A being on respective lateral regions of the second and third portions 2, 3 which contact the edge of the rail foot 12.
• the flat face 1A is contiguous with the flat face 2A, which is in turn contiguous with the flat face 3A, but this is not essential.
• the flat face 1A on the first portion 1 serves to avoid the pneumatic resistance which would otherwise occur when the first portion 1 is inserted into a blind hole 14 in the sleeper 15 of the same, rather than slightly larger, diameter, thereby permitting a closer fit of the first portion 1 in the hole 14 and thus inhibiting lateral movement of the rail foot 12.
• the flat face 1A could be replaced by a concave channel 1C formed in the first portion 1 to achieve the same purpose, but for ease of manufacture it is preferable to have a flat face 1A, desirably on the same side of the clip as the flat faces 2A, 3A.
• the pre-formed flat faces 2A and 3A on the second and third portions 2,3 of the clip 9 serve to prevent the gauge widening which would otherwise occur in these regions if they were of round cross-section and a flat face was worn on these regions.
• Such pre-formed flat faces could also advantageously be applied to a rail clip not having a flat face or concave channel on the downward leg.
• a clip 9 having ,the flat faces 1A, 2A and 3A can be made using the method illustrated in Figures 9 (A) to 9(D) .
• Fig. 9(A) a pre-bent form is supported horizontally and the flat faces 1A, 2A and 3A are formed by pressing in the direction of arrow A.
• the partially-formed clip is then supported vertically (Fig. 9(B)) and a force applied in the direction of arrow B (Fig. 9(C)) to the part which is to form the seventh portion 7 in order to bend that part to its final shape, thereby forming a clip embodying the present invention (Fig. 9(D)).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Railway Tracks (AREA)
• Clamps And Clips (AREA)
• Connection Of Plates (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Passenger Equipment (AREA)
• Insertion Pins And Rivets (AREA)
• Machines For Laying And Maintaining Railways (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9935796

Family Applications (1)

Country Status (12)

Citations (2)

Family Cites Families (5)

• 2002
  • 2002-04-30 GB GB0209867A patent/GB2388141B/en not_active Expired - Fee Related
• 2003
  • 2003-04-04 EP EP03747358A patent/EP1499777B1/en not_active Expired - Fee Related
  • 2003-04-04 BR BRPI0309538-0A patent/BR0309538B1/pt active IP Right Grant
  • 2003-04-04 WO PCT/GB2003/001480 patent/WO2003093580A1/en active IP Right Grant
  • 2003-04-04 CN CNB038094843A patent/CN1304696C/zh not_active Expired - Fee Related
  • 2003-04-04 AU AU2003226532A patent/AU2003226532A1/en not_active Abandoned
  • 2003-04-04 DE DE60312313T patent/DE60312313T2/de not_active Expired - Fee Related
  • 2003-04-14 MY MYPI20031398A patent/MY131242A/en unknown
  • 2003-04-25 PE PE2003000416A patent/PE20031043A1/es not_active Application Discontinuation
  • 2003-04-28 UY UY27782A patent/UY27782A1/es not_active Application Discontinuation
  • 2003-04-30 AR ARP030101512A patent/AR039503A1/es active IP Right Grant
• 2004
  • 2004-10-29 EC EC2004005398A patent/ECSP045398A/es unknown

Patent Citations (3)

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