US20130168461A1 - Expanding insert for a rail spike - Google Patents

Expanding insert for a rail spike Download PDF

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Publication number
US20130168461A1
US20130168461A1 US13/820,924 US201113820924A US2013168461A1 US 20130168461 A1 US20130168461 A1 US 20130168461A1 US 201113820924 A US201113820924 A US 201113820924A US 2013168461 A1 US2013168461 A1 US 2013168461A1
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US
United States
Prior art keywords
leg
expansion insert
plane
bend
insert
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.)
Abandoned
Application number
US13/820,924
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English (en)
Inventor
Christian Schnyder
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.)
SERSA GROUP AG
SERSA GROUP AG (SCHWEIZ)
Original Assignee
SERSA GROUP AG (SCHWEIZ)
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
Application filed by SERSA GROUP AG (SCHWEIZ) filed Critical SERSA GROUP AG (SCHWEIZ)
Assigned to SERSA GROUP AG reassignment SERSA GROUP AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Schnyder, Christian
Publication of US20130168461A1 publication Critical patent/US20130168461A1/en
Abandoned 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
    • E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
    • E01B9/14—Plugs, sleeves, thread linings, or other inserts for holes in sleepers
    • 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
    • E01B9/04—Fastening on wooden or concrete sleepers or on masonry without clamp members
    • E01B9/14—Plugs, sleeves, thread linings, or other inserts for holes in sleepers
    • E01B9/16—Plugs, sleeves, thread linings, or other inserts for holes in sleepers for wooden sleepers

Definitions

  • the invention relates to an expansion or expansion insert for rail spikes according to the preamble of patent claim 1 .
  • the crosstie screws and rail spikes loosen.
  • the track gauge and guiding distance and also the rail height are changed.
  • the firm screw fit is re-established in that the old crosstie screws are removed and the hole is drilled out and cleaned.
  • an expansion inert is introduced into this hole.
  • the hole is filled with grouting compound and subsequently a new crosstie screw is screwed in, wherein the expansion insert provides the new crosstie screw with a firm hold.
  • a base plate preferably a Lupolen base, is laid on the crosstie, usually before the hole is grouted.
  • CH 514 734 proposes using an expansion insert, as per FIG. 5 , said expansion insert having the form of a helical spring.
  • an expansion insert as per FIG. 3 is used.
  • This expansion insert has three axially parallel legs, which are bent from a one-piece bar material. A free end which is at the top in the installed state of the expansion insert is bent substantially horizontally. This bend or catch is intended to be caught by the screw and to serve as an additional screw guide.
  • rail spikes are usually used instead of crosstie screws.
  • both of the expansion inserts described in CH 514 734 have the drawback that when used in combination with a rail spike, the pull-out resistance is too low.
  • the pull-out resistance is understood to mean the resistance to a force with which the rail spike is intended to be pulled out of the crosstie.
  • it was found that the introduction of a rail spike into a hole provided with such an expansion insert is problematic, because the expansion insert has often pushed the spike out of the center axis of the hole.
  • EP 1 449 961 also discloses an expansion insert, which is advantageous in connection with screws having blunt screw ends.
  • Similar drawbacks arise from the technical teaching of EP 1 449 361 and the use for rail spikes has proven difficult.
  • an expansion insert for rail spikes has two, first and second legs that are connected together via a first bend and extend at least approximately parallel to one another, and also has a third leg connected to the second leg via a second bend.
  • the first leg and the second leg are located in a common first plane and the third leg is located in a second plane which is substantially perpendicular to the first plane.
  • the second plane extends through the second leg, as a result of which the expanding insert can be designed to be even more compact.
  • the first leg has a free end which forms an at least approximately rectilinear extension of the first leg.
  • the free end forms exactly a rectilinear extension.
  • the third leg has a free end which forms at least approximately, preferably exactly, a rectilinear extension of the third leg.
  • the first, leg and/or the third leg have at their free end(s) a hooking section which extends at an angle, preferably perpendicularly, to the respective leg.
  • the expansion insert is produced in one piece from a bar material and is manufactured from a special steel.
  • the first bend is located in the first plane and the second bend in the second plane.
  • first and second legs extend, at least approximately parallel to one another and/or wherein the first leg and the second leg are at least approximately the same length.
  • the third leg extends at an acute angle or at least approximately parallel to the second leg.
  • the first bend and the second bend have the same bending radius.
  • the first and the second bend can in this case be formed in a semicircular or quadrant-shaped manner, wherein two quadrant-shaped bends are then connected via a straight leg. In the latter embodiment, it is also possible to refer to a web.
  • FIG. 1 shows a cross section through a railroad crosstie having expansion inserts according to the invention
  • FIG. 2 shows a side view of a rail spike for use in combination with the expansion inserts according to FIG. 1 ;
  • FIG. 3 shows a view from the front of the rail spike from FIG. 2 ;
  • FIG. 4 shows a view from below of the rail spike from FIG. 2 ;
  • FIG. 5 shows a side view of an expansion insert from the right
  • FIG. 6 shows a front view of the expansion insert according to FIG. 5 ;
  • FIG. 7 shows a side view of the expansion insert according to FIG. 5 from the left;
  • FIG. 8 shows a top view of the expansion insert. according to FIG. 5 ;
  • FIG. 9 shows a perspective view of the expansion insert.
  • FIG. 1 illustrates a cross section through a track section of a railroad crosstie.
  • a rail 2 is fastened to a rib place 5 by means of rail spikes 7 .
  • the rail spikes 7 project through openings 50 in the rib plate and extend into holes 3 which are produced in the crosstie 1 , wherein the rail spikes 7 are fixed in the holes 3 .
  • an expansion insert 4 is lowered into the holes 3 and optionally grouted in a watertight manner therein by means of a grouting compound 6 .
  • the rail spikes 7 in the process clamp the rail 2 to the crosstie 1 or rib plate 5 .
  • FIGS. 2 to 4 show an embodiment of a rail spike 7 for use in the track structure according to FIG. 1 .
  • the rail spike 7 comprises a head section 70 , a shank section 71 adjoining the latter, and a spike tip section 72 which adjoins the shank section 71 .
  • the spike tip section 72 ends with a spike tip 73 .
  • the shank section 71 and the spike tip 72 extend along a center axis M.
  • the head section 70 comes into contact with the rail 2 and clamps the latter against the rib plate 5 .
  • the shank section 71 projects through the receiving opening 50 in the rib plate 5 and extends into the hole 3 in the crosstie.
  • the shank section 71 has a square or rectangular cross section.
  • the shank section 71 can also have a circular cross section.
  • the spike tip section 72 is in this case designed such that the cross section of the spike tip section 72 , as seen from the shank section 71 , is reduced continuously.
  • the degree of reduction is constant over the spike tip section 72 from the shank section 71 to the spike tip 73 .
  • the spike tip 73 can have a multiplicity of different shapes. In the present embodiment, it is provided with a convex edge.
  • Such a rail spike 7 typically has a diameter in the range of 14 to 19 mm, in particular 16 mm, and a length in the range of 130 to 180 mm, in particular 165 mm.
  • FIGS. 5 to 9 illustrate the expansion insert 4 according to the invention. It is bent from, a one-piece bar material, preferably composed of special steel, as can also be used for reinforcing iron.
  • the expansion insert 4 has three legs 40 , 41 , 42 , which are formed in a slightly resilient manner with respect to one another.
  • a first and a second leg 40 , 41 extend at least approximately, here exactly, parallel to one another.
  • the first and second legs 40 , 41 are connected together via a first bend 43 .
  • the first leg 40 and the second leg 41 are located in a common first plane E 1 . That is to say that for example the center axes along which the legs 40 , 41 are part of this first plane E 1 and define this first plane 21 .
  • This first plane E 1 extends in the plane of the drawing sheer in FIG. 6 and is indicated by a line E 1 in FIG. 5 .
  • the first bend 43 is formed in a manner bent in the first plane E 1 of the two legs 40 , 41 , as can be seen best from FIG. 9 .
  • the second leg 41 is adjoined by a second bend 44 which is then followed by the third leg 42 .
  • the third leg 42 is located in a second plane E 2 which is perpendicular to the first plane E 1 .
  • the second plane E 2 is located such that it extends through the second leg 41 such that the third leg 42 comes to lie over the second leg 41 .
  • the second plane E 2 is illustrated correspondingly in FIG. 5 .
  • the expansion insert 4 according to the invention can be used for rail spikes, since the expansion insert is inserted into the hole 3 such that all three legs 40 , 41 , 42 are in contact with the wall of the hole 3 and none of them reduces the cross section of the hole more than necessary.
  • the rail spike can be driven in well without excessive deformation of the expansion insert being necessary, as occurs for example in embodiments of the prior art.
  • the rail spike is not deflected from its axis during the driving in operation. While the rail spike is being driven in, the legs are pressed into the side wall of the hole. Consequently, the rail spike 7 and the expansion insert 4 are clamped together in the hole.
  • the first leg 40 has a first free end 46 which forms at least approximately, preferably exactly, a rectilinear extension of this leg 40 .
  • the third leg 42 has a second free end 45 , which forms at least approximately, preferably exactly, a rectilinear extension of this leg 42 .
  • the third leg 42 is adjoined, by a hooking section 47 , which extends away from the third leg 42 at an angle, preferably perpendicularly, and extends preferably in the second, plane E 2 .
  • the hooking section 47 is pushed into the wood of the crosstie by the hammering down of the rail spike, it being possible in this way to further increase the resistance to pulling out,
  • the first leg 40 can comprise a hooking section (not illustrated here), which is designed in an analogous manner to the hooking section 47 .
  • the second leg 41 is preferably designed to be longer than the first leg 40 , as can be seen in FIG. 2 .
  • the third log is preferably designed to be shorter than the two other legs 40 , 41 . However, it extends preferably along at least two thirds of the length of the expansion insert 4 .
  • all three legs 40 , 41 , 42 extend parallel to one another.
  • the third leg 42 can extend at an acute angle to the second leg 41 , as can be seen best in FIG. 3 . Both embodiments are advantageous, since both provide a very compact structure.
  • the first bend 43 and the second bend 44 have the same bending radius, this being advantageous with regard to the compact structure.
  • the expansion insert can be designed to be very compact, this allowing insertion into holes 3 which have a comparatively small diameter, as is usual for holes for rail spikes.
  • the first leg 40 typically has a length from the free end 46 to the first bend 43 of 75 to 105 mm. Particularly preferred is a length range between 78 and 98 mm, in particular 93 mm.
  • the second leg 41 typically has a length from the first bend 43 to the second bend 44 of 90 to 120 mm.
  • a length range between 95 and 110 mm, in particular 100 mm.
  • the third leg 42 typically has a length from the free end 45 to the second bend 44 of 65 to 100 mm. Particularly preferred is a length range between 83 and 93 mm, in particular 88 mm.
  • Both bends 43 , 44 have preferably a radius of 6 to 12 mm, particularly preferably of 8 to 10 mm, in particular 9 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
  • Rehabilitation Tools (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US13/820,924 2010-09-06 2011-09-05 Expanding insert for a rail spike Abandoned US20130168461A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10175436A EP2426257A1 (de) 2010-09-06 2010-09-06 Spreizeinlage für Schienennagel
EP1075436.4 2010-09-06
PCT/EP2011/065307 WO2012032011A1 (de) 2010-09-06 2011-09-05 Spreizeinlage für schienennagel

Publications (1)

Publication Number Publication Date
US20130168461A1 true US20130168461A1 (en) 2013-07-04

Family

ID=43480855

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/820,924 Abandoned US20130168461A1 (en) 2010-09-06 2011-09-05 Expanding insert for a rail spike

Country Status (5)

Country Link
US (1) US20130168461A1 (ru)
EP (1) EP2426257A1 (ru)
CA (1) CA2809226A1 (ru)
EA (1) EA022378B1 (ru)
WO (1) WO2012032011A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10422085B2 (en) * 2016-08-26 2019-09-24 Pandrol Limited Tie plate for railroad tracks with spike protectors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9637867B2 (en) * 2014-08-05 2017-05-02 Good Earth Tools, Inc. Spike claw puller and method of manufacture thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1289718A (ru) * 1968-09-27 1972-09-20

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756591A (fr) * 1969-09-24 1971-03-01 Neumann Terrasan G Dispositif et procede de fixation de rails
US3716608A (en) * 1971-02-12 1973-02-13 Neumann G Terrasan Erzeugnisse Method for restoring railway ties
ES2316948T3 (es) 2003-11-04 2009-04-16 Sersa Ag Inserto de expansion para tornillo de traviesa.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1289718A (ru) * 1968-09-27 1972-09-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10422085B2 (en) * 2016-08-26 2019-09-24 Pandrol Limited Tie plate for railroad tracks with spike protectors

Also Published As

Publication number Publication date
CA2809226A1 (en) 2012-03-15
EP2426257A1 (de) 2012-03-07
WO2012032011A1 (de) 2012-03-15
EA201001468A1 (ru) 2012-02-28
EA022378B1 (ru) 2015-12-30

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SERSA GROUP AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHNYDER, CHRISTIAN;REEL/FRAME:030483/0453

Effective date: 20130425

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION