US3784098A - Rail fastening - Google Patents

Rail fastening Download PDF

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Publication number
US3784098A
US3784098A US00268801A US3784098DA US3784098A US 3784098 A US3784098 A US 3784098A US 00268801 A US00268801 A US 00268801A US 3784098D A US3784098D A US 3784098DA US 3784098 A US3784098 A US 3784098A
Authority
US
United States
Prior art keywords
clip
rail
sleeper
outer end
base portion
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.)
Expired - Lifetime
Application number
US00268801A
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English (en)
Inventor
M Serafin
M Decubber
B Oise
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.)
Traverses En Beton Arme Systeme Vagneux SA
Original Assignee
Traverses En Beton Arme Systeme Vagneux SA
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 FR7128079A external-priority patent/FR2148713A5/fr
Priority claimed from FR7145480A external-priority patent/FR2165101A6/fr
Application filed by Traverses En Beton Arme Systeme Vagneux SA filed Critical Traverses En Beton Arme Systeme Vagneux SA
Application granted granted Critical
Publication of US3784098A publication Critical patent/US3784098A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E01B9/28—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

Definitions

  • a rail fastening comprises a resilient U-shaped clip the base of which is supported against the sleeper with the [30] Foreign Application Priority Data free outer ends of the clip arms engaging the rail foot.
  • Holding down means acting against an intermediate France 7128079 portion of the arms stresses the clip to clamp the rail Dec. 17, 1971 France 7145480 foot.
  • the intermediate am portions are circularly curved in a vertical plane, and the holding down 52 ⁇ J.S.3
  • the outer end portions 5 References cued are flattened where they engage the rail foot.
  • This invention relates to a rail fastening, and more particularly to an improved rail clip for fixing a rail on a sleeper.
  • a rail fastening has been proposed which comprises a resilient rail clip substantially U-shaped in plan.
  • the base of the clip bears against the sleeper, and the free outer end portions of the arms of the clip are engaged with the rail foot.
  • Holding down means connected to the sleeper engage the arms of the clip at an intermediate position and deflects the arms so that the clip exerts a clamping force on the rail foot.
  • a disadvantage of the known rail fastenings is that it is difficult to achieve the required clamping force, and if as a result of this difficulty the rail fastening when installed exerts insufficient clamping force on the rail foot the stability of the track can be impaired.
  • the present invention provides a rail fastening comprising a resilient rail clip which is substantially U- shaped in plan and comprises a base portion engageable with a sleeper mounting and two arms extending laterally away from the base portion, the free outer end portions of which arms are engageable with the rail foot, wherein a portion of each arm intermediate its free outer end portion and the base portion of the clip is substantially circularly curved in a vertical plane for engaging holding down means of complementary shape, and each said outer end portion narrows in thickness and increases in widths from adjacent the said intermediate portion towards the outer free end.
  • the outer arm portions of the resilient rail clip of the invention have considerable flexibility outwardly of the curved intermediate portions, and the arms deflect by generally rotational displacement about the centre of curvature of the curved intermediate arm portions, the deflection of the clip providing a progressively increasing clamping force for securing a rail on a sleeper.
  • the holding down means may comprise a fixed reaction member secured to the sleeper, but preferably the holding down means comprises a sleeper bolt and a bearing member engageable with the circularly curved intermediate arm portions, and a nut on the bolt for urging the bearing member against the clip. As the'nut is tightened down the arms of the clip progressively deflect and exert a clamping force on the rail, the base portion of the clip being supported by its engagement with the sleeper mounting.
  • FIG. 1 is a side elevation of a rail clip in accordance with the invention
  • FIG. 2 is a plan view of the rail clip of FIG. 1;
  • FIG. 3 is a vertical cross-sectional view of a rail fastening in accordance with the invention installed in a railway track;
  • FIGS. 3a, 3b and 3c respectively illustrate successive stages in the installation of the rail fastening shown in FIG. 3;
  • FIG. 4 is a plan view of the rail fastening shown in FIG. 3;
  • FIG. 5 is a perspective view of bearing means employed in the rail fastening
  • FIG. 6 is a graph relating vertical deflection of the rail clip in accordance with the invention to the clamping force developed.
  • the rail clip 30 comprises a resilient spring steel member which is substantially U- shaped in plan, as seen in FIG. 2, and comprises a base portion 33 and two arms 31 and 32 extending laterally away from the base portion 33.
  • the arms 31 and 32 each comprise a free outer end portion 31b, 32b respectively, and an intermediate portion 31a, 32a.
  • the intermediate portions 31a, 32a of the arms between the free outer end portions 31b, 32b, and the base portion 33 are curved in a vertical plane, the configuration of the curved portions being substantially part of a circle having a centre at 0.
  • Each outer end portion 31b, 32b decreases in vertical thickness h from adjacent the curved intermediate portion 31a, 32a towards the outer free end of the arm, and simultaneously increases in width I progressively from adjacent the curved intermediate portion towards the free outer end.
  • the free outer end portions 31b, 32b each constitute a flat of substantially constant thickness and width.
  • the width and thickness of the base portion 33 and of the intermediate arm portions 31a, 32a are constant.
  • a plane p tangential to the lower face of the outer end portions 31b, 32b i.e., a plane containing the base of each flat forms an angle a with a plane Q containing the upper surface of the base portion 33 of the rail clip and of the inner part of each arm adjacent the base.
  • the plane P passes above the base portion 33 of the clip and above the centre of curvature 0.
  • the angle a will have a value of between about 3 and about 12, a suitable angle being about 10.
  • FIG. 3 shows the rail fastening in use to fix a rail R on a sleeper T which may be made of wood, reinforced or prestressed concrete, or metal. Only a portion of the rail R and sleeper T are shown in the Figure.
  • the sleeper T has a shoulder 20 which carries an insulating bearing pad 21.
  • the foot of the rail R rests on the bearing pad 21.
  • Adjacent the shoulder 20, the sleeper has a recess 22 which terminates in a lateral shoulder 23.
  • a conventional sleeper bolt 50 has a nut 51 screwed onto its threaded outer end 50a.
  • a washer 52 is placed over the bolt 50 and rests on the sleeper in the recess 22.
  • the lateral shoulder 23 of the sleeper T carries a support plate 24 serving as a mounting for the base portion 33 of the rail clip 30.
  • the support plate 24 has a flange 24a which acts as a stop for the clip. The free outer end portions of the arms 31, 32 of clip 30 are engaged with.
  • a bearing member 60 is retained on the sleeper bolt 50 by the nut 51.
  • the bearing means 60 has a central bore 60a and a bottom surface 60b having a circularly curved configurationcomplementary to curved configuration of the intermediate arm portions 31a, 32a of the clip 30 and engages the said curved intermediate portions.
  • FIG. 3a shows a preliminary stage in the installation wherein the washer 52 has been placed over the bolt 50, the rail clip 30 placed in position with the curved intermediate arm portions adjacent the bolt 50, and the bearing member 60 has been fitted onto the bolt. At this stage the rail clip rests loosely against the plate 36 on the rail foot and against the bearing plate 24.
  • the nut 51 is threaded onto the bolt 50 and is screwed down.
  • the bearing member 60 is forced down against the arms of the rail clip, causing the arms and particularly the outer end portions 31b, 32b progressively to deflect substantially by rotation about the centre of curvature O of the curved intermediate portions.
  • Tightening of the nut 51 is continued until the lower sides of the intermediate portions 31a, 32a of the arms abut firmly against the washer 52 as shown in FIG. 3c.
  • the outer end portions 31b, 32b of the two arms of the rail clip do not exert clamping force against the rail foot.
  • an intermediate value of clamping force is exerted evenly against the rail foot by the two arms.
  • the maximum clamping force is exerted.
  • the washer 52 serves as an abutment means on the sleeper which predetermines the clamping force developed by the rail clip when the nut 51 is tightened down into its final position.
  • FIG. 6 is a graph illustrating the progressively increasing clamping force developed by the rail clip.
  • the ordinate shows the vertical deflection F of the rail clip expressed in millimetres, and the abscissa the clamping force S expressed in kilograms.
  • the solid line curve represents the clamping characteristic of the rail clip in accordance with the invention, and shows the progressive increase in the clamping force developed as the clip is tightened down.
  • the reference characters A, B, C in FIG. 6 indicate the characteristic at the successive stages of installation shown in FIGS. 30, 3b and 30, respectively.
  • FIG. 6 also shows in broken line the clamping characteristic of a prior art U- shaped rail clip as referred to hereinabove, and which does not incorporate the present invention. It will be seen that in the present invention the deflection of the rail clip is considerably greater for the same clamping force, which is a fundamental advantage.
  • a rail fastening as proposed by the present invention is simple to install and the achievement of the required clamping force is also a simple matter in that no adjustvments are required to be made during installation, the
  • the rail fastening is also easy to dismantle, provides excellent transverse stability for the rail, allows electrical installation and is usable in connection with all types of sleepers.
  • the fastening has been described in a mode which does not require the use of base plates on the sleeper, it will readily be appreciated that the rail fastening may be used in conjunction with a base plate.
  • the bolt 50 may extend into the sleeper as shown, or may be replaced by a shorter bolt connected to the base plate, the base plate itself being secured to the sleeper in any suitable known way.
  • the rail fastening according to the invention comprising the resilient rail clip may also be used as a fastening system wherein the holding down means comprises a member fixedly secured to a sleeper and having a projecting head as described, for example, in
  • a rail fastening comprising a resilient rail clip which is substantially U-shaped in plan and comprises a base portion engageable with a sleeper mounting and two arms extending laterally away from the base portion, the free outer end portions of which arms are engageable with the rail foot, wherein a portion of each arm intermediate its free outer end portion and the base portion of the clip is substantially circularly curved in a vertical plane for engaging holding down means of complementary shape, and each said outer end portion narrows in thickness and increases in widths from adjacent the said intermediate portion towards the outer free end, a plane extending tangentially from the lower faces of the said free outer end portions passing above the said base portion when the clip is in unstressed condition.
  • the holding down means comprises a sleeper bolt and a bearing member .engageable with the said circularly curved intermediate arm portions, and a nut on said bolt for urging said bearing member against said clip for stressing said clip, abutments means provided on the sleeper engaging said circularly curved intermediate portions of said arm from the side opposite said bearing means to predetermine the clamping force developed by said clip when said nut is tightened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US00268801A 1971-07-30 1972-07-03 Rail fastening Expired - Lifetime US3784098A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7128079A FR2148713A5 (pl) 1971-07-30 1971-07-30
FR7145480A FR2165101A6 (pl) 1971-12-17 1971-12-17

Publications (1)

Publication Number Publication Date
US3784098A true US3784098A (en) 1974-01-08

Family

ID=26216547

Family Applications (1)

Application Number Title Priority Date Filing Date
US00268801A Expired - Lifetime US3784098A (en) 1971-07-30 1972-07-03 Rail fastening

Country Status (11)

Country Link
US (1) US3784098A (pl)
AU (1) AU465307B2 (pl)
BE (1) BE784722A (pl)
CH (1) CH561822A5 (pl)
ES (1) ES403912A1 (pl)
GB (1) GB1395258A (pl)
IT (1) IT959466B (pl)
NL (1) NL155065B (pl)
OA (1) OA04105A (pl)
PL (1) PL78131B1 (pl)
SU (1) SU484704A3 (pl)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887128A (en) * 1974-06-13 1975-06-03 Portec Inc Rail fastener
US3888414A (en) * 1973-05-03 1975-06-10 Ressorts Du Nord Sa Resiliently yieldable rail fastening
US3934800A (en) * 1973-04-17 1976-01-27 Molyneux Rail Clips Limited Track rail anchorages
US3986667A (en) * 1974-02-26 1976-10-19 Schwihag Gesellschaft Fur Eisenbauh-Oberbau Mbh Stock-rail fastening for switches and crossings of railway track installations
US4062490A (en) * 1976-05-21 1977-12-13 Transit Products Company, Inc. Rail fastening clips
US4452392A (en) * 1981-11-04 1984-06-05 Bojji Rajaram Rail spring clip fastening assembly
GB2146375A (en) * 1983-09-09 1985-04-17 Dayco Corp Rail fastening insulator
US5221044A (en) * 1991-12-19 1993-06-22 Guins Sergei G Rail fastening system with gage adjustment means
US5692677A (en) * 1993-05-10 1997-12-02 Allevard Device for supporting and securing a railway track rail
US6685101B1 (en) * 1999-11-12 2004-02-03 Matthys Pretorius Strydom Railway fastening clip
CN103422401A (zh) * 2013-08-09 2013-12-04 北京中铁福斯罗技术有限公司 一种将铁路设备固定在轨枕上的系统
CN105658871A (zh) * 2013-10-09 2016-06-08 沃斯洛工厂有限公司 用于夹紧轨足的弹性的中间部件
EP3325837B1 (de) 2015-07-22 2019-12-04 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Montagewerkzeug für belaghaltebügel mit sicherungsvorrichtung einer scheibenbremse, scheibenbremse und bremsbelagsatz

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570871A (en) * 1947-06-05 1951-10-09 United States Steel Corp Rail fastening device
US3558050A (en) * 1967-10-31 1971-01-26 Sonneville Roger P Rail support device
US3658247A (en) * 1969-04-11 1972-04-25 Vagneux Traverses Beton Railway sleeper and clip for securing a rail thereto

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570871A (en) * 1947-06-05 1951-10-09 United States Steel Corp Rail fastening device
US3558050A (en) * 1967-10-31 1971-01-26 Sonneville Roger P Rail support device
US3658247A (en) * 1969-04-11 1972-04-25 Vagneux Traverses Beton Railway sleeper and clip for securing a rail thereto

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934800A (en) * 1973-04-17 1976-01-27 Molyneux Rail Clips Limited Track rail anchorages
US3888414A (en) * 1973-05-03 1975-06-10 Ressorts Du Nord Sa Resiliently yieldable rail fastening
US3986667A (en) * 1974-02-26 1976-10-19 Schwihag Gesellschaft Fur Eisenbauh-Oberbau Mbh Stock-rail fastening for switches and crossings of railway track installations
US3887128A (en) * 1974-06-13 1975-06-03 Portec Inc Rail fastener
US4062490A (en) * 1976-05-21 1977-12-13 Transit Products Company, Inc. Rail fastening clips
US4452392A (en) * 1981-11-04 1984-06-05 Bojji Rajaram Rail spring clip fastening assembly
GB2146375A (en) * 1983-09-09 1985-04-17 Dayco Corp Rail fastening insulator
US4569477A (en) * 1983-09-09 1986-02-11 Dayco Corporation Railroad track insulator and part therefor
US5221044A (en) * 1991-12-19 1993-06-22 Guins Sergei G Rail fastening system with gage adjustment means
US5692677A (en) * 1993-05-10 1997-12-02 Allevard Device for supporting and securing a railway track rail
US6685101B1 (en) * 1999-11-12 2004-02-03 Matthys Pretorius Strydom Railway fastening clip
CN103422401A (zh) * 2013-08-09 2013-12-04 北京中铁福斯罗技术有限公司 一种将铁路设备固定在轨枕上的系统
CN103422401B (zh) * 2013-08-09 2016-03-30 北京中铁福斯罗技术有限公司 一种铁路设备固定系统和调节其的方法
CN105658871A (zh) * 2013-10-09 2016-06-08 沃斯洛工厂有限公司 用于夹紧轨足的弹性的中间部件
EP3325837B1 (de) 2015-07-22 2019-12-04 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Montagewerkzeug für belaghaltebügel mit sicherungsvorrichtung einer scheibenbremse, scheibenbremse und bremsbelagsatz

Also Published As

Publication number Publication date
DE2225220B2 (de) 1976-05-26
NL155065B (nl) 1977-11-15
CH561822A5 (pl) 1975-05-15
BE784722A (fr) 1972-10-02
AU4428672A (en) 1974-01-10
AU465307B2 (en) 1975-09-25
PL78131B1 (en) 1975-04-30
ES403912A1 (es) 1975-11-16
NL7208143A (pl) 1973-02-01
OA04105A (fr) 1979-11-15
GB1395258A (en) 1975-05-21
IT959466B (it) 1973-11-10
DE2225220A1 (de) 1973-02-15
SU484704A3 (ru) 1975-09-15

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