EP0007813A1 - Federnde Schienenbefestigung - Google Patents

Federnde Schienenbefestigung Download PDF

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Publication number
EP0007813A1
EP0007813A1 EP79301531A EP79301531A EP0007813A1 EP 0007813 A1 EP0007813 A1 EP 0007813A1 EP 79301531 A EP79301531 A EP 79301531A EP 79301531 A EP79301531 A EP 79301531A EP 0007813 A1 EP0007813 A1 EP 0007813A1
Authority
EP
European Patent Office
Prior art keywords
rail
leg
chair
clip
fastening assembly
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.)
Granted
Application number
EP79301531A
Other languages
English (en)
French (fr)
Other versions
EP0007813B1 (de
Inventor
Graham Mcleod Fee
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.)
True Temper Railway Appliances Inc
Original Assignee
True Temper Railway Appliances Inc
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 True Temper Railway Appliances Inc filed Critical True Temper Railway Appliances Inc
Priority to AT79301531T priority Critical patent/ATE5982T1/de
Publication of EP0007813A1 publication Critical patent/EP0007813A1/de
Application granted granted Critical
Publication of EP0007813B1 publication Critical patent/EP0007813B1/de
Expired 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

  • the present invention relates, generally, to assemblies for securing a rail to an anchoring support or crosstie therefor. More specifically, the present invention relates to a simplified drive-on rail fastening assembly including a torsional spring rail clip having a generally S-shaped geometrical configuration, and a cooperating chair designed to engage a tie anchor portion of the clip and restrain a rail bearing portion thereof in proximate engagement with the base flange of a railway rail.
  • This assembly employs a leaf spring type “Springlock”.
  • This assembly employs a leaf spring type clip which is restrained in a somewhat horizontal position by an anchoring member, with one end of the clip in engagement with the base flange of the rail, the other ; end supported by a heel block.
  • U.S. Patent No. 4,067,495 discloses a spring clip having a pair of distal mounting legs projecting in the same direction and adapted to be seated on opposite sides of the chair and having a crossover loop, the clip being of generally B-shaped configuration.
  • the clip while relatively simpler to manufacture, requires precise dimensioning and curving of the loop and captured ends.
  • Another object of the present invention is to provide a versatile, drive-on rail fastening assembly which may be manufactured and installed in a materially easier manner than prior art rail clips.
  • Still another object of the present invention is to provide a drive-on rail fastening assembly which eliminates the need to employ any threaded parts.
  • Yet another object of the present invention is to provide a drive-on rail fastening assembly including a chair which establishes an anchoring-effective torsional force on the generally S-shaped torsional spring rail clip, whereby anchoring efficiency of the assembly is enhanced.
  • a further object of the present invention is to provide a rail fastening assembly for use in conjunction with concrete ties, where forces exerted on the tie by the assembly are uniformly distributed to improve service life of the tie.
  • the present invention provides a drive-on rail fastening assembly for securing a railway rail, having laterally projecting base flanges, to an anchoring support therefor, said assembly comprising:
  • the present invention relates to drive-on rail fastening assemblies for securing a railway rail to a tie or sleeper.
  • Rail fastening assemblies are designed to effectively force-couple the railway rail to the tie or sleeper in order to anchor the rail for effective use. In terms of the present invention, this is achieved by embedding the shank of the chair member of the boltless fastener type within the concrete cross tie, securing the rail clip to the chair head disposed above the tie, and securing the clip to the base flange of the rail. Consequently, the rail is force-coupled through the rail clip/chair/tie.
  • the rail fastening assembly must firmly restrain the base of the rail under static conditions and must also operate efficiently under those dynamic conditions which occur during passage of a train along the railway tracks. It is important that the rail fastening assembly maintains a positive restraining force on the railway rail under all conditions of use, regardless of longitudinal or wave motion of the railway track.
  • Figuresl-4 show a rail fastening assembly, designated generally as 10, anchoring a section of railway rail 12 to a concrete tie 14.
  • the rail 12 as is conventional, includes a base 16 having laterally projecting flanges 18.
  • a tie pad 20 is interposed between the tie 14 and base 16 of the rail.
  • the assembly 10 is comprised of a generally S-shaped torsional rail clip, designated generally as 100; a chair, designated generally as 200, adapted to have the clip driven thereon; and a shimming pad designated 300 interposed between the base flange 18 and clip 100.
  • a shimming pad designated 300 interposed between the base flange 18 and clip 100.
  • that side of the chair 200 facing rail 12 (as viewed in Figure 2) will be termed the “inner side”, while the opposite side will be termed the “outer side”.
  • that end of the chair 200 from which the clip 100 is driven on (as viewed in Figure 4) will be termed the "front end", while the opposite end will be termed the "back end”.
  • the rail clip 100 is a torsional spring rail clip having a generally S-shaped geometrical configuration. The simplicity inherent in this design facilitates both the fabrication of the clip as well as application thereof, as described more fully hereinbelow.
  • the clip 100 is comprised of a central leg 102 and a pair of loops 104 and 106 on opposite sides and extending from opposite ends thereof. Loop 104 comprises the tie anchor portion of clip 100, while loop 106 comprises the rail bearing portion thereof, as viewed in Figure 2. Loop 104 includes an arcuate leg 108 and a terminal leg 110. Similarly, loop 106 includes an arcuate leg 112 and a terminal leg 114. Each of the terminal legs 110 and 114 has a free distal end, 116 and 118, respectively. Preferably, the legs have divergent ends and the junctures of terminal legs form protruberant elements 120 and 122.
  • the dimensioning and cross-sectional configurations of the elements comprising rail clip 100 may vary widely without departing from the scope of the present invention; provided the overall S-shaped geometry is maintained. Accordingly, the central leg and terminal legs might be linear or have a slight curvature imparted thereto.
  • the central axes of each of these members might lie on a common plane or on different planes.
  • the central axes of the central leg 102 and terminal leg 110 might lie on a first plane
  • the central axes of the central leg 102 and terminal leg 114 might lie on a second plane, wherein the angular displacement between the two planes may vary up to about 45°, but preferably less than about 15°.
  • the three central axes may be skewed with respect to one another.
  • the linear distance between successive axes might be the same or different and the relative sizes of the loops 104 and 106 comprising the clip 100 tailored to accommodate the same.
  • the chair 200 which cooperates with rail clip 100 is comprised of a downwardly projecting shank 202 adapted to be embedded within concrete tie 14.
  • the cross-sectional profile of the shank or stem 202 is preferably rectilinear, preferably rectangular.
  • the outer surface of the shank 202 is shown in Figure 6 as provided with a stepped wedge configuration resulting from a plurality of laterally projecting ridges 204 which define spaced recesses 205. Accordingly, the shank or stem 202 as shown in said embodiment has a somewhat undulating geometry which materially improves pull-out resistance of the chair 200 from concrete tie 14.
  • the shank 202 projects downwardly from a shelf 206, which is preferably reinforced at the rear end of chair 200 by a gusset 208 extending between the shelf 206 and the stem 202. Projecting upwardly from the shelf 206 is a head 210.
  • Head 210 is adapted to receive the tie anchoring portion of rail clip 100, the head cooperating with the loop 104 of clip 100 interiorly thereof to receive the same in latched engagement.
  • the head 210 is formed with a jaw 212 on the inner side thereof; the bight of jaw 212 being provided at its upper end with a projecting lip 214 and at its lower end with a ledge 216 on shelf 2 0 6.
  • the ledge 216 is comprised of a pair of spaced ledge members.
  • the bight of jaw 212 is configured to receive central leg 102 in close engagement, as best viewed in Figure 3, and the same are complementary.
  • a ramp 218 is formed on the shelf 206 on the outer side of head 210.
  • the ramp 218 comprises a sloped leading edge 220 which rises vertically to a flattened, substantially horizontal ledge 222.
  • the terminal leg 110 moves upwardly on the ramp 218 as the clip is driven into its seating engagement with the chair and is lifted thereby.
  • a latching feature as shown may be provided to firmly secure the clip to the chair head 210.
  • Said latching means comprises a recess 224 formed in the head 210 vertically above the ramp 218 which mates with a protruberance 120 on the side of the terminal leg 110, as best viewed in Figure 2.
  • the protruberance 120 in such case functions as a detent which snaps into the recess 224 when the clip 100 is driven into engagement with head 21 0 .
  • the recess 224 could, if desired, be provided on the head 21 0 in another location; or the latching means could consist of a recess in the leg of the rail clip 100, with mating detent means in the chair structure.
  • the front end of head 200 preferably includes an overdrive protector 226, as best viewed in Figures 2 and 7, in the form of an outwardly projecting arcuate face 227.
  • Said over-drive protector 226 ensures accurate positioning of the clip 100 on the head 210 during drive-on application of the clip by forming an abutting stop for the arcuate leg 108 comprising the tie anchor portion 104 of the clip.
  • the clip will be limited in its drive-on by abutment of the overdrive protector 226 with the leg 108.
  • An internal pocket 228 is formed on the inner side of head 210 configured for receiving a projecting central portion of the shim or insulator pad 300, as described hereinbelow. preferably, the pocket 228 extends between the spaced ledges21 6 defining the lower terminus of jaw 212, as described above. Pocket 228 ensures accurate placement and alignment of insulator pad 300, while preventing any displacement thereof during dynamic operating conditions which occur as a train passes over the railway tracks. The internal configuration of the pocket 228 and the complementary formation of the pad thus improves the structural integrity of the overall assembly and provides a more efficient cooperation of the elements comprising the same.
  • a shim or insulator pad preferably is interposed between the top, upwardly sloped face of flange 18 and the rail bearing portion 106 of clip 100.
  • This pad designated generally as 300, is restrained and positioned by cooperation with internal pocket 228 of chair 200.
  • a principal purpose of such a pad 300 is for the electrical insulation of the railway rail from those parts securing it to tie 14.
  • the pad must also aid in transmitting an upwardly directed tensional force on terminal leg 114 of clip 100 as described below.
  • the pad 300 may accomplish either or both of these objectives.
  • Pad 300 is preferably comprised of a coated metallic shim 302 having a layer of encapsulating, insulation-effective polymer 304 coated thereon in order to afford both a force transmitting structure and one which advantageously electrically insulates the rail and fastening assembly.
  • Pad 300 is susceptible, however, to modification if either feature is not desirable; for example, the polymer coating might be eliminated should electrical isolation of the parts by unnecessary.
  • a highly preferred insulator coating is high density polyethylene; although other similar polymeric materials capable of withstanding the forces to which the insulator pad will be subjected might be selected by the skilled artisan.
  • the metal shim 302 is comprised of an outwardly projecting center tab portion 306, which includes an upstanding leg 308 and a lower leg 310 substantially perpendicular thereto.
  • a leg 312 is formed as a continuous extension of the leg 310, and joins an upstanding leg 314 substantially parallel with leg 308. Accordingly, the legs, 308, 310, 312 and 314 define a somewhat rectangular channel 316 extending transversely across metal shim 302, the channel having a pair of recesses 318 formed at the bottom corners thereof.
  • a leg 320 extends obliquely from leg 314; the upper longitudinal and transverse edges thereof having a taper 322 and 324, respectively.
  • Metal shim 302 is preferably encapsulated by the insulation-effective, high density polyethylene material.
  • the polyethylene coats the edges of legs 312 and 314 to provide an outwardly directed skirt 326 adjacent the tab 306.
  • the tab 306 may thus be inserted within pocket 228 up to the skirt 326.
  • Channel 316 as shown is filled with polyethylene insulator flush with the top surface of leg 308 for the portion of the channel corresponding to leg 312. Beyond that point, denoted 328, the polyethylene surface slopes upwardly corresponding to the upward slope of leg 320.
  • leg 314 as well as the bottom face of leg 320 are also provided with a layer of polyethylene 330 which overlaps the top face of leg 320 in the form of a transverse bulbous element 332. Accordingly, the area of contact between the base flange 18 of rail 12 and the rail fastening assembly 10 is effectively electrically insulated, while forces necessary to restrain the rail 12 may nonetheless be effectively transmitted therebetween.
  • the rail fastening assembly 10 of the present invention enjoys numerous advantages over rail fastening devices known in the prior art.
  • One particularly advantageous feature is the ease with which the respective components may be fabricated.
  • Fabrication of the S-clip of the present invention is materially simplified over the clips heretofore proposed.
  • standard bar stock of appropriate length and cross-section to form a single clip can be heated and bent around a mandrel in order to achieve the overall S configuration.
  • the detent and required specific angularity between central axes can be imparted to the preformed clip by way of a forging or similar operation.
  • Uniformity of cross-sectional dimensions permits the attainment of uniform metallurgical properties throughout the clip.
  • a mechanical feeder for round stock introduces a piece of steel bar heated to about 1800 F to a two-stage forming press.
  • the steel preferably, AISI 1060-1095, is preheated and sized in order that the length of the bar is suitable for yielding a single S-clip.
  • the bar stock is fed to the first stage of the press which imparts the overall S-shape thereto by longitudinally bending the stock about appropriately dimensioned mandrels.
  • the S-shaped bar is rotated 90° and transferred to the second, final forming stage, where the sides and top geometries are imparted to the clip by a transverse bending operation.
  • the formed clip is ejected to a quenching bath and tempered as may be desirable. Because of the uniformity of cross-section, homogeneous metallurgical properties are obtained in the finished clip.
  • the chair 200 which is preferably cast from malleable cast iron.
  • the lack of through bores or other complex re-entrant design reduces the complexity of the casting process by eliminating cores which must be employed in the casting of known chair designs.
  • the chairs 200 may be embedded in a concrete tie prior to a full cure thereof, with the plane of shelf 206 substantially level with the top surface of the tie. As shown in Figures 1-3, a pair of chairs will be positioned adjacent to the area of the tie which receives rail 12. When the tie has been positioned, an elastomeric tie pad 20 can then be disposed over the tie and rail 12 positioned between the opposing chairs. Shim or insulator pad 300 is then inserted with lip 306 located in pocket 228 of chair 200. The assembly is completed by driving rail clips 100 into seating engagement with head 210, as illustrated in Figure 4. Application of the clips 100 may be manual; although automated apparatus for applying the clips is desirably employed.
  • the terminal leg 110 will engage the sloped portion 220 of ramp 218. Simultaneously, the rail bearing portion l06 of the clip 100 will begin riding upon the upwardly sloped face of the flange 18 of the rail. Consequently, as the clip is driven on, upward tensional forces will be exerted on the two terminal legs 110 and 114. When the clip 100 is fully seated on chair 200, with detent 120 engaging recess 224, the static upwardly directed tensional forces will reach their maximum on these terminal leg members of the clip. The magnitude of these forces can be tailored by appropriate design of the geometrical configuration of the clip structure, taking into account the relative lateral placement of the chair 200 and dimensioning of ramp 218.
  • the projecting lip 214 of jaw 212 will provide a counteractive, downwardly directed restraining force on central leg 102, firmly securing the clip against any longitudinal or rotational displacement. Consequently, the upward force exerted on terminal leg 114 by virtue of the sloping face of flange 18 will be resolved as a counterclockwise torsional force at one end of central leg 102; the tensional force being coupled to the central leg by arcuate leg 112. Similarly, the upward tensional force exerted upon terminal leg 110 by ramp 218 will be resolved into a clockwise torsional force on the other end of central leg 102; the tensional force in leg 110 being transmitted by arcuate leg 108. In this manner, both ends of central member 102 are wound up yielding a torsional spring clip.
  • the rail fastening assembly 10 provides a positive downward restraining force on the flange 18. Any motion of the rail, whether it be longitudinal or transverse (including any wave or rocking motion) will not diminish the efficiency of the rail fastening assembly, and that rail motion will be positively counteracted by the downward force on the base flange. Consequently, the rail is efficiently force coupled to the tie or sleeper.
EP79301531A 1978-08-02 1979-07-31 Federnde Schienenbefestigung Expired EP0007813B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79301531T ATE5982T1 (de) 1978-08-02 1979-07-31 Federnde schienenbefestigung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93023278A 1978-08-02 1978-08-02
US930232 1978-08-02

Publications (2)

Publication Number Publication Date
EP0007813A1 true EP0007813A1 (de) 1980-02-06
EP0007813B1 EP0007813B1 (de) 1984-01-25

Family

ID=25459075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301531A Expired EP0007813B1 (de) 1978-08-02 1979-07-31 Federnde Schienenbefestigung

Country Status (10)

Country Link
EP (1) EP0007813B1 (de)
JP (1) JPS5520900A (de)
AR (1) AR223346A1 (de)
AT (1) ATE5982T1 (de)
BR (1) BR7902934A (de)
CA (1) CA1148913A (de)
DE (1) DE2966577D1 (de)
IN (1) IN152851B (de)
MX (1) MX148362A (de)
ZA (1) ZA791950B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413777A (en) * 1980-09-29 1983-11-08 Pandrol Limited Rail clip and an assembly on a railway track which includes the clip
US4466569A (en) * 1980-10-15 1984-08-21 Pandrol Limited Anchoring a railway rail-fastening clip to a foundation for a railway rail
WO2015065213A1 (en) * 2013-10-30 2015-05-07 Plastwil Spółka Z Ograniczoną Odpowiedzialnością S.K.A. Insulating shim for fastening rails by means of resilient steel rods
CN116967381A (zh) * 2023-09-25 2023-10-31 四川龙腾铁路器材有限公司 一种双耳楔形线夹制造方法
CN117647168A (zh) * 2024-01-29 2024-03-05 武汉思力博轨道装备有限公司 一种轨枕及扣件通用组合检测装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH086082Y2 (ja) * 1990-08-24 1996-02-21 大和工業株式会社 レールの弾性締結構造

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1534017B (de) * Baseler, Wolfgang, Dr.-Ing., 8031 Stockdorf Schienenbefestigung auf einer Unterlagsplatte mittels aus Stabmaterial gebogener, lösbarer Federklammern
AT255468B (de) * 1965-08-16 1967-07-10 Hollitzer Baustoffwerke Fahrschienenbefestigung an Betonschwellen oder Betondecken
GB1305871A (de) * 1971-01-26 1973-02-07
DD109912A1 (de) * 1974-01-28 1974-11-20
GB1486451A (en) * 1973-09-07 1977-09-21 Molyneux Rail Clips Ltd Combined rail clip and anchorage
US4067495A (en) * 1975-08-28 1978-01-10 Portec Inc., Railway Products Div. Unitary spring clip rail fastener

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS502969U (de) * 1973-05-14 1975-01-13

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1534017B (de) * Baseler, Wolfgang, Dr.-Ing., 8031 Stockdorf Schienenbefestigung auf einer Unterlagsplatte mittels aus Stabmaterial gebogener, lösbarer Federklammern
AT255468B (de) * 1965-08-16 1967-07-10 Hollitzer Baustoffwerke Fahrschienenbefestigung an Betonschwellen oder Betondecken
GB1305871A (de) * 1971-01-26 1973-02-07
GB1486451A (en) * 1973-09-07 1977-09-21 Molyneux Rail Clips Ltd Combined rail clip and anchorage
DD109912A1 (de) * 1974-01-28 1974-11-20
US4067495A (en) * 1975-08-28 1978-01-10 Portec Inc., Railway Products Div. Unitary spring clip rail fastener

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413777A (en) * 1980-09-29 1983-11-08 Pandrol Limited Rail clip and an assembly on a railway track which includes the clip
US4466569A (en) * 1980-10-15 1984-08-21 Pandrol Limited Anchoring a railway rail-fastening clip to a foundation for a railway rail
WO2015065213A1 (en) * 2013-10-30 2015-05-07 Plastwil Spółka Z Ograniczoną Odpowiedzialnością S.K.A. Insulating shim for fastening rails by means of resilient steel rods
CN116967381A (zh) * 2023-09-25 2023-10-31 四川龙腾铁路器材有限公司 一种双耳楔形线夹制造方法
CN116967381B (zh) * 2023-09-25 2023-12-12 四川龙腾铁路器材有限公司 一种双耳楔形线夹制造方法
CN117647168A (zh) * 2024-01-29 2024-03-05 武汉思力博轨道装备有限公司 一种轨枕及扣件通用组合检测装置
CN117647168B (zh) * 2024-01-29 2024-04-05 武汉思力博轨道装备有限公司 一种轨枕及扣件通用组合检测装置

Also Published As

Publication number Publication date
DE2966577D1 (en) 1984-03-01
EP0007813B1 (de) 1984-01-25
AR223346A1 (es) 1981-08-14
ZA791950B (en) 1980-05-28
JPS5520900A (en) 1980-02-14
ATE5982T1 (de) 1984-02-15
MX148362A (es) 1983-04-14
CA1148913A (en) 1983-06-28
BR7902934A (pt) 1980-03-18
IN152851B (de) 1984-04-21

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