CA2004173C - Strap for the quick fastening of a railroad rail - Google Patents
Strap for the quick fastening of a railroad rail Download PDFInfo
- Publication number
- CA2004173C CA2004173C CA002004173A CA2004173A CA2004173C CA 2004173 C CA2004173 C CA 2004173C CA 002004173 A CA002004173 A CA 002004173A CA 2004173 A CA2004173 A CA 2004173A CA 2004173 C CA2004173 C CA 2004173C
- Authority
- CA
- Canada
- Prior art keywords
- strap
- abutment
- rail
- fastening
- bearing point
- 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 - Fee Related
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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
-
- 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
- E01B9/58—Fastening the rail in the chair
-
- 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
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- 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)
- Clamps And Clips (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Bridges Or Land Bridges (AREA)
- Package Frames And Binding Bands (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention provides a strap for the fastening of railroad rails to ties or stringers. The fastening strap is composed of a rod having a vertical rectilinear part and a curved part which forms a spring. The end grips the flange of the rail to be fastened, after being tensioned as a result of the rotation of the strap above a ramp, the lower end of the rectilinear part being equipped with a heel catching on a retaining surface in the tie. The strap has an intermediate bearing point which, during the rotation of the strap, bears on an abutment or on a bearing surface of a metal sole plate. This intermediate bearing point ensures the stability of the strap during its rotation and in its tensioned position and, if an abutment is used, keeps this abutment in place.
Description
' CA 02004173 1999-04-O1 Strap For The Quick Fastening Of A Railroad Rail The subject of the present invention is a strap for the quick fastening of a railroad rail to ties or stringers made of concrete, wood, plastic or metal, the said strap being composed of a steel or reinforced plastic rod having a vertical rectilinear part terminating in an eccentric heel intended for interacting with a catching means associated with the tie or with a metal sole plate fastened to the tie, and a curved part which forms a spring and the end of which is intended to press onto the flange of the rail after the rotation of the rod about its vertical part, during which rotation the said end moves on a ramp intended for tensioning that part of the strap forming a spring and for leading it onto the flange of the rail.
A strap of this type is described in the Patent Applica-tion FR 2, 608,182 . For fastening a rail to a concrete tie without a metal pad, the strap is used together with a plastic abutment pierced with a hole which the rod of the strap passes through. For fastening a rail to a metal pad, this strap is used without an abutment. In both cases, once the bearing end of the strap has been brought onto the flange of the rail, the tension on the strap tends to cause the latter to tilt, so that its rectili-near rod comes to bear against the edge of the hole in the abutment or in the metal pad. Although this torsion is not particularly troublesome where a metal pad is concerned, in contrast it has disadvantages with regard to a strap used with a plastic abutment. To overcome this disadvantage, the upper edge of the hole in the abutment has been reinforced by means of a collar. The abutment nevertheless tends to lift as a result of tilting about its outer edge and, on the other hand, instead of exerting a vertical pressure on the concrete of the tie, it exerts a transverse pressure against the side wall of its receptacle in the concrete. Such a stress on the concrete can cause the concrete to crack. Moreover, the abutment has to withstand compressive and torsional forces which are difficult to control.
An object of the present invention is to provide a fastening strap overcoming the abovementioned disad-vantages, whilst at the same time preserving the simplic-ity of the prior strap. More specifically, the object of the invention is to provide a fastening strap which exerts a vertical pressure on the abutment or on the metal pad at all times and the rod of which does not tilt and does not come to bear against the edge of the hole in the abutment or in the metal sole plate.
The strap according to the invention is characterized in that the curved part of the rod of the strap has a form both undulated vertically and wound about the vertical part of the rod, in such a way that it has an inter-mediate bearing point formed by the bottom of the first undulation and a main bearing point located near the end of the rod, these two bearing points being mutually opposite in relation to the vertical part, but at different distances from this vertical part, the radius of revolution of the intermediate bearing point being substantially smaller than the radius of revolution of the main bearing point.
Since the strap always bears at two mutually opposite points in relation to the rectilinear part of the strap, this part maintains a vertical position. When the strap is used with an abutment, the intermediate bearing of the strap exerts on the abutment a vertical force which results in a favorable compression of the concrete of the tie in the zone absorbing the lateral forces of the rail.
The strap according to the invention can be supplied together with its abutment, to form a device for fastening a rail to a concrete tie. Another subject of the invention is such a fastening device, characterized in that the perimeter of the upper face of the abutment is contained between the circle of revolution of the intermediate bearing point and the circle of revolution of the main bearing point.
A railroad tie equipped with such fastening devices has, for each rail, a recess intended for receiving the rail and two receptacles which are laterally adjacent to this recess and in which the abutments of the fastening devices are 1o seated. The tie has a ramp extending at least between that edge of the said receptacles opposite the recess intended for the rail and the edge of this recess, these ramps forming the ramps intended for tensioning the straps, and means embedded in the tie for the retention of the rods of the straps.
Therefore, the invention provides a fastening strap for the quick fastening of a railroad rail to ties, the strap being a rod having a vertical rectilinear part terminating in an eccentric heel intended for interacting with a catching means associated with the tie, and a curved part which forms a spring and the end of which is intended to press onto a flange of the rail after rotation of the strap about its vertical part to an installed position, during which rotation the end moves on a ramp intended for tensioning that part of the strap forming a spring and for leading it onto the flange of the rail. The curved part of the strap has a shape both undulated vertically and wound about the vertical part of the rod so as to form an intermediate bearing point formed by a bottom of a first undulation and a main bearing point located near the end of the strap formed by a second undulation. These two bearing points are disposed on mutually opposite sides of the vertical part and at different distances from this vertical part, a radius of revolution of the intermediate bearing point being substantially smaller than a radius of revolution of the main bearing point.
Another aspect of the invention is a sole plate for a railroad tie equipped with straps according to the invention, the rods of which pass through holes provided in the pad and catch on countersinks into which the holes open, the sole plate having a receptacle intended for receiving the rail and, on each side of this receptacle, ramps the extension of which coincides with the flange of the rail, characterized in that the ramps have the form of a path in an arc of a circle, the mean radius of which is 2o equal to the radius of revolution of the main bearing point of the straps. The start of the ramp can correspond to the point of temporary fastening of the strap to the sole plate.
Furthermore, the fastening strap is advantageously equipped with a profiled piece made of synthetic - 9a -material, serving for plugging that part of the hole used for the passage of the eccentric catching heel of the strap and for guiding its vertical rectilinear part during its rotation.
An exemplary embodiment of the strap and examples of the use of this strap will now be described, with reference to the accompanying drawings:
Figure 1 is a first elevation view of the fastening strap.
Figure 2 is a plan view of this same fastening strap.
Figure 3 is a side view of this strap in the direction A
of Figure 1, that is to say in a position rotated through 90° in relation to Figure 1.
Figure 4 is an elevation view of a metal sole plate equipped with a fastening strap according to the inven tion.
Figure 5 is a plan view of this same metal sole plate.
Figure 6 is a partial sectional view of a concrete tie equipped with a fastening strap according to the inven-tion, according to a first embodiment.
Figure 7 is a partial plan view of this same concrete tie.
Figure 8 is a perspective view of the anchoring socket embedded in the concrete.
Figure 9 shows a complete tie with the rails fastened.
Figure 10 is a partial view of Figure 3, showing the strap equipped with an auxiliary closing and guiding piece.
_ 5 _ Figure 11 is a top view of this same strap part.
Figure 12 is a view in vertical section of the auxiliary piece shown in Figures 10 and 11.
Figure 13 is a partial view, in section according to XIII-XIII of Figure 15, of a concrete stringer equipped with a fastening strap and with a rail, according to a second embodiment.
Figure 14 is a side view in section according to XIV-XIV
of Figure 15.
Figure 15 is a plan view of the stringer of Figure 13.
Figure 16 is an exploded view of the metal support equipping the stringer of Figures 13 to 15 and of the abutment.
Figure 17 shows the same stringer equipped with an abutment of a different form.
The strap illustrated in Figures 1 to 3 is composed of a steel rod of circular cross-section, having a vertical rectilinear part 1 equipped, at its base, with a heel 2 directed perpendicularly relative to the axis 3 of this rectilinear part. The steel rod has a form both undulated vertically and wound about the axis 3 of the vertical part. The undulated part is composed of a short rising part 4, rectilinear as seen in horizontal projection {Figure 2), followed by a falling part 5 extending over a little more than a semicircle, as seen in horizontal projection, a first low point 6 constituting an intermediate bearing point and followed by a rising part 7, first rectilinear, as seen in horizontal projection, and then rounded, at the same time passing via a high point, to fall again in a longer undulation 8 of low curvature, terminating at the bottom of the undulation in a bent part 9 parallel to the part 7, as seen in ' CA 02004173 1999-04-O1 horizontal projection, and constituting a main bearing point 10. The bearing points 6 and 10 have flats intended for reducing the wear of both the strap at its bearing points and the parts on which it bears: The bearing points 6 andl0, as seen in plan view, that is to say in the direction of the axis 3 (Figure 2), are mutually opposite diametrically in relation to the middle 11 of the catching heel 2. In this same view, the axis 3 of the rectilinear part is located substantially at the center of the triangle formed by the parts 7 and 8 of the rod and by the straight line connecting the bearing points 6 and 10. It will be seen later that this arrangement directs the forces in a suitable way and ensures that the strap has a high stability. The vertical rectilinear part 1 can be of greater or lesser length, depending on the type of tie on which it is to be used. It will be seen that the main bearing point 10 and the intermediate bearing point 6 are not at the same level, the bearing point 10 being approximately 1 cm lower than the bearing point 6.
The use of the fastening strap illustrated in Figures 1 to 3 for the fastening of a rail by means of a metal sole plate will now be described with reference to Figures 4 and 5.
These figures show a metal sole plate 12 having a recess 13 intended for receiving a rail 14, with an elastic pad 15 made of rubber and two lateral abutments 16 and 17 made of plastic being interposed. The lower face 18 of the metal sole plate 12 is inclined slightly, since it is intended to be fastened to a concrete tie having an inclined plane. For this purpose, the metal sole plate 12 has two oblong holes 18 and 19 intended for receiving tie screws which are preferably screwed into PLASTIRAIL
(registered trade mark) anchoring sockets embedded in the concrete. On each side of the recess 9, the sole plate 12 has two plane bearing surfaces 20 and 21 intended for receiving the fastening straps. Only the bearing surface _ 7 _ 20 need be described in detail, the bearing surface 21 being identical to the bearing surface 20, but arranged upside down in relation to the rail. The bearing surface 20 is plane and horizontal. It has a part of circular contour 22 and a rectilinear part 23 extending along the recess 13. Round the plane part 20 there extends, over a quarter circle, a ramp 24 in the form of a path rising progressively in the direction of the rail 1~. The top of this ramp 20 is level with the edge of the flange 25 of the rail. The middle of the plane part 20 is pierced with a hole 26, the form of which matches the forrn of the profile of the rectilinear part 1 of the strap and of the heel 2, as seen in the plan view of Figure 2, there being the play necessary for the free insertion of the rec-tilinear part 1 of the strap into this hole 26. The hole 26 opens into a countersink 27 made in the lower face of the sole plate 12.
The fastening strap is installed in the position repre-sented by dot-and-dash lines, that is to say in a posi-Lion rotated through 180° about the axis 3 in relation to the posi~ion represented by unbroken lines. In this position, the catching heel 2 can be introduced freely into the hole 26. The main bearing point 10 is in a pasition 10' outside the ramp 24, and the catching heel 2 is very slightly below the countersink 27. As a result of a slight rotation of the strap, simultaneously the main bearing point 10 of the strap is brought onto the raattp 24 and the heel 2 of the strap is brought up against the countersink 27. As a result of an. additional slight rotation of the strap, the latter is given a slight tension sufficient to fasten the strap temporarily to the metal sole plate 12. This position is designated by 10".
The metal sole plate can thus be supplied equipped with the fastening straps, the straps being held sufficiently for transport and placing on the track. Once the metal sole plate is fastened to the tie and the rail 14 placed in its receptacle, each of the fastening straps is driven in rotation, in such a way that its main bearing point 30 - 8~
~~~.'~e~
moves along the ramp 24, the mean .radius of which is equal to the radius of revolution of the bearing point 10 about the axis 3. As regards the intermediate bearing point 6, this moves on the horizontal plane surface 20.
The bearing point 10 finally comes to bear on the flange 25 of the rail, at the same time exerting a pressure of the order of 10 to 12 kN. Furthermore, the strap bears on the bearing surface 20 of the sole plate by means of its intermediate bearing point 6, thereby exerting a vertical pull on the catching heel 2 via the rectilinear part 1 of the strap. The countersink 27 extends approximately over a semicircle, in such a way that the heel comes ug against the end of this countersink, thus limiting the rotation of the fastening strap. It is possible to provide a notch in the countersink 27, so that the catching heel 22 is locked in this countersink, thereby preventing the removal of the strap, once the rail has been fastened. In the right-hand portion of Figure 5, some parts corresponding to the left-hand portion have been designated by the same references accompanied by the sign The arc of rotation of the strap between the installation position and the rail-fastening position need not necess-arily be 180°, but can be less than or more than 180°.
The use of a fastening strap according to the invention for fastening a rail to a concrete tie 28 without a metal sole plate will now be described by means of Figures 6 and ?. This concrete tie can be made completely of concrete or be composed of two concrete blocks connected by means of a metal rod, as illustrated in Figure 9.
Figures 6 and ? show only part of the tie, that is to say the part corresponding to a rail. For each of the rails, the tie 28 has a recess 29 intended for receiving the rail. nn each side of this recess 29, the tie 28 has two ramps 30 and 31 descending avaay from the recess 29. On each side of the recess 29, the tie 28 also possesses two rectangular receptacles 32 and 33, the bottom of which is g ~~)'~~' ,at the Same level as the bottom of the recess 29 and which communicate with this recess. Two profiled sockets 34 made of synthetic material and surrounded by metal are embedded in the concrete. These sockets have the same composition and the same external form as the PIaASTIRATL
(registered trade mark) sockets serving for the fastening of the tie screws and described in the French Patent Application No. 88.12,185. These sockets 34, at their base, have a widening 35 forming a countersink 3b intended for performing the same function as the counter-sink 27 of the metal sole plate. The socket 34 is shown in perspective in Figure 8. Above the widening 35, the socket has a profile 37 matching the profile of the catching heel 2 of the fastening strap. In this 35 embodiment, the fastening strap has a rectilinear part 1 substantially longer than the strap illustrated in Figures 1 to 3, so as to be capable of catching at the bottom of the socket 34. Of course, the sockets 34 open out into the.bottom of the receptacles 32 and 33. The fastening strap is mounted together with an abutment 38, made of synthetic material, inserted between the curved Bart of the strap and the concrete. This abutment 38 has the form of a rectangular parallelepiped extended later-ally by a bearing surface 39 which is in the form of an arc of a circle and which extends the plane upper face of the abutment and engages on the bottom of the receptacle 32 in a stepped manner. The general form of the abutment 38 corresponds to the form of the receptacle 32 in which this abutment is seated. The abutment 38 has a profiled hole 40 allowing the passage of the catching heel 2 of the strap. The perimeter of the abutment 38 as contained between the circle of revolution of the intermediate bearing point 6 and the circle of revolution of the main bearing point 10, ~.~r such a way that this main bearing point ZO is always~utside th~ abutment.
The fastening strap equipped with its abutanent 38 is first introduced into the socket 34 in the position represented by dot-and-dash lines 6', 10', that is to say -1:0-,in a position rotated through 180° in relation to the position represented by unbroken lines. In this position, the main bearing point 10' is 1 or 2 mm from the surface of the concrete on the ramp 30. As a result of a slight rotation of the strap in the clockwise direction, the heel 2 of the strap enrages under the countersink 36. As a result of an additional slight rotation, the main bearing point 10' rises slightly on the ramp 30, the effect of which is to exert some tension on the strap, this tension ensuring the temporary fastening of the strap to the concrete tie. This temporary fastening position is, for example, the position 10". The tie can therefore be equipped with the fastening straps at the factory. To fasten the rail 14, it is sufficient to continue rotating the strap. During this rotation, the main bearing point 10 rises progressively on the ramp 30 of the concrete, the end of which is level with the flange 25 of the rail. The main bearing point 10 comes to bear under tension on the flange 25 with a pressure of the order of 10 to 12 kN. The rotation of the abutment is limited by the form of the widening 35 of the socket 34 which forms a stop limiting 'the rotation of the catching heel 2. During the rotation of the strap, the inter-mediate bearing point 6 slides on the horizontal surface of the abutment 3s, at the same time keeping the rec-tilinear Bart 1 of the strap in a vertical position. The strap exerts no lateral pres$ure on the hole 40 in the abutment 3s. In the final position, the intermediate bearing point 6 grips the bearing surface 39 of the abutment against the corxcrete. The compression of the concr~te in this zone is expedient because the concrete can thus better withstand the transverse forcss attribut-able to the lateral pressure exerted by the rail via the abutment 3s.
The socket 34 can, of course, also be provided with a locking notch for the heel 2 of the strap, if it is desirable that the latter be unremnovable.
.. 11 _ ~~~~~a~
The complete tie ~8 is illustrated in Figure 9. A com-posite concrete/steel tie has been represented by dot-and-dash lines. The tie is equipped with four straps 1.
It is supplied equipped with these straps, the temporary fastening of which is sufficient to keep the assembly in place during transport and putting on the track.
The hole 26 in the metal sale plate and the hale 40 in the abutment 3~ allows sand and dirt to penetrate.
Figures 10 to 12 show a means of plugging this hale, whilst at the same time ensuring a better guidance of the vertical part 1 of the strap during its rotation. Figures 10 and 11 illustrate a part of the strap shown in Figures 1 to 3. Fastened to the vertical part 1 between the heel 2 and the first curved part 4 of the strap is a plastic plug 41 which fills the vertical space between the heel 2 and the part 4 and the profile of which fills the profile of the hole 26. This plug 41 is equipped with two curved arms 42 and 43, by means of which the plug 41 is fastened by gripping to the cylindrical part 1 of the strap. The plug 4~. is preferably slightly larger than the hale 26 and hollava, as shovrn by the cross-section il-lus~trated in Figure 12, so as to have a transverse elasticity in order to plug the hale 26 more effectively.
xn Figure 10, dot-and-dash lines also represent the level of the surface 20 of the metal sole plate. When the strap is being intraduced inter the hole 26, the plug 41 is engaged into this hole 26 together with the rectilinear part of the strap, the assembly as a whale accupying the entire cross-section of the hole 26. During the rotation of the strap, the plug 41 remains in place, serving as a . guide for the part 1 of the strap. Figure 11 shows the strap after sorate rotation of the latter in relation to the p7.ug 41 retained xn the hole 26.
The strap illustrated in Figures 6 and 7 and in Figures 13 to 17 can, of course, be equipped with a plug similar to the plug 41 and differing from this only in its length.
_ 12_ The form of the undulations of the strap and the form of its heel and of the holes for the passage of this heel can, of course, differ from the forms shown.
The abutment 38 could be larger and have a ramp similar to the ramp 24 for the main bearing point 10 of the strap.
The rails are sometimes laid on stringers or ties roads of prestressed concrete. The manufacture of stringers or ties made of prestressed concrete does not allow the presence of recesses, such as the recesses provided in the ties illustrated in Figures 6 and 7. In this case, it is expedient to resort to another solution for fastening the abutments made of synthetic material. Figures 13 to 16 illustrate such a solution. Anchored in the prestres-sed-concrete stringer or tie 50, the surface of which is smooth, are metal supports 51 in the form of a bow of rectangular profile, the lower ends of which are bent to ensure an anchorage in the concrete. An abutment 52 made of synthetic material is mounted on each of the bows 51.
In parallel with the profile of the bow 51, this abutment 52 likewise has a bow-shaped profile, as shown in Figure 16. More specifically, the abutment has a plane upper face 53, a relatively thick side 54 serving as a center-ing abutment for the rail 14, and two thinner lateral sides 55 to 56 serving for retaining the abutment on the bow 51, the side 56 being equipped with a heel 57, the upper face of which is in the form of a ramp 58 rising towards the part 54. A horizontal wall 59 starting from the part 54 extends between the walls 55 anal 56. The distance between the wall 59 and the part 53 of the abutment corresponds to the thickness of the bar forming the bow 51. The stop 52 is slipped laterally onto the bow 51 in the direction of the arrow of Figure 16, the bow engaging between the part 53 and the wall 59 and between the walls 55 and 56. The abutment 52 is provided with a profiled hole 60 coinciding with a hole 61 of the same profile in the bow 51, for the passag$ of the strap. The _ 13 _ v~~~~~~.~'~
upper portion of the part 54 of the abutment has~a chamfer 62. When the abutment 52 is mounted on its support 51, the sides 55 and 56 and the heel 57 are in cantact with the stringer 50. mhe abutment 52 is first equipped with a strap identical to the straps of the preceding figures. As before, the main bearing point 10 of the strap is brought onto the start of the ramp 58 in order to fasten the strap temporarily. After the rail 14 has been installed between these abutments, this being made easier by the chamfers 62, the strap is driven in rotation in such a way that the main bearing point 10 rises on the ramp 58 to the height of the flange and the rail 14. As in the preceding embodiments, the perimeter of the upper face 53 of the abutment is contained between the circle of revolution of the intermediate bearing point 6 and the circle of revolution of the main bearing point 10.
By providing abutments having different thicknesses in the region of the part 54, it is possible, if the ap-propriate thickness is selected, to wedge the rail perfectly in the lateral direction.
Moreover, the thin wall 5~ leas the effect of insulating the strap electrically from the metal support 51.
The abutment described above need not necessarily be mounted upon its metal support 51 before the laying of the rail. Figure 17 illustrates an alternative embodiment allowing the insulating abutment to be fastened after the laying of the rail. Since the abutment is a wearing part, its replacement can thus be carried out without moving the rail. The abutment 63 differs from the abutment 52 in that the wall 59 is replaced by a ra.m 64 parallel to the part 54° corresponding to the part 54, this rim 64 terminating in a hookashaped eactra thickness 65 having a chamfer 66. The wall 64 is not connected to the side walls corresponding to the walls 55 and 56 of Figure 16.
The abutment 63 is installed vertically on the metal 1 ' support 51, a simple pressure on the abutment moving apart elastically the Tall 6~ which is fastened to the support 51 by snapping.
The abutment 63 is advantageously equipped with a flex-ible tongue 66 extending laterally from the part 54'. d3s emerges from the drawing, this tongue 66 is intended to rest on the flange of the rail 14. Tt is attached to the abutment somewhat high up, in such a way that it can follow the flange of the rail in its descending movement when it is being fastened by means of the strap. The tongue 66 is finally gripped between the flange of the rail and the main bearing point 10 of the strap. The tongue 66 protects the flange of the rail against a punching effect as a result of the friction of the strap and insulates the metal strap electrically from the rail.
The part 54' of the abutment possesses, in its lower part, a chamfer 67 intended to make it easier to intro-duce this part 54' between the support 51 and the flange of the rail.
Tn a simplified embodiment, the support 51 and the abutment 52 could be produced in one piece from a ductile material, such as cast .iron, graphite cast iron, alloy or composite material. The abutment so obtained takes the form of a piece anchored in the concrete and leaving a bowpshaped part located above the concrete and intended for the fastening of a strap, such as the strap desc-ribed.
A strap of this type is described in the Patent Applica-tion FR 2, 608,182 . For fastening a rail to a concrete tie without a metal pad, the strap is used together with a plastic abutment pierced with a hole which the rod of the strap passes through. For fastening a rail to a metal pad, this strap is used without an abutment. In both cases, once the bearing end of the strap has been brought onto the flange of the rail, the tension on the strap tends to cause the latter to tilt, so that its rectili-near rod comes to bear against the edge of the hole in the abutment or in the metal pad. Although this torsion is not particularly troublesome where a metal pad is concerned, in contrast it has disadvantages with regard to a strap used with a plastic abutment. To overcome this disadvantage, the upper edge of the hole in the abutment has been reinforced by means of a collar. The abutment nevertheless tends to lift as a result of tilting about its outer edge and, on the other hand, instead of exerting a vertical pressure on the concrete of the tie, it exerts a transverse pressure against the side wall of its receptacle in the concrete. Such a stress on the concrete can cause the concrete to crack. Moreover, the abutment has to withstand compressive and torsional forces which are difficult to control.
An object of the present invention is to provide a fastening strap overcoming the abovementioned disad-vantages, whilst at the same time preserving the simplic-ity of the prior strap. More specifically, the object of the invention is to provide a fastening strap which exerts a vertical pressure on the abutment or on the metal pad at all times and the rod of which does not tilt and does not come to bear against the edge of the hole in the abutment or in the metal sole plate.
The strap according to the invention is characterized in that the curved part of the rod of the strap has a form both undulated vertically and wound about the vertical part of the rod, in such a way that it has an inter-mediate bearing point formed by the bottom of the first undulation and a main bearing point located near the end of the rod, these two bearing points being mutually opposite in relation to the vertical part, but at different distances from this vertical part, the radius of revolution of the intermediate bearing point being substantially smaller than the radius of revolution of the main bearing point.
Since the strap always bears at two mutually opposite points in relation to the rectilinear part of the strap, this part maintains a vertical position. When the strap is used with an abutment, the intermediate bearing of the strap exerts on the abutment a vertical force which results in a favorable compression of the concrete of the tie in the zone absorbing the lateral forces of the rail.
The strap according to the invention can be supplied together with its abutment, to form a device for fastening a rail to a concrete tie. Another subject of the invention is such a fastening device, characterized in that the perimeter of the upper face of the abutment is contained between the circle of revolution of the intermediate bearing point and the circle of revolution of the main bearing point.
A railroad tie equipped with such fastening devices has, for each rail, a recess intended for receiving the rail and two receptacles which are laterally adjacent to this recess and in which the abutments of the fastening devices are 1o seated. The tie has a ramp extending at least between that edge of the said receptacles opposite the recess intended for the rail and the edge of this recess, these ramps forming the ramps intended for tensioning the straps, and means embedded in the tie for the retention of the rods of the straps.
Therefore, the invention provides a fastening strap for the quick fastening of a railroad rail to ties, the strap being a rod having a vertical rectilinear part terminating in an eccentric heel intended for interacting with a catching means associated with the tie, and a curved part which forms a spring and the end of which is intended to press onto a flange of the rail after rotation of the strap about its vertical part to an installed position, during which rotation the end moves on a ramp intended for tensioning that part of the strap forming a spring and for leading it onto the flange of the rail. The curved part of the strap has a shape both undulated vertically and wound about the vertical part of the rod so as to form an intermediate bearing point formed by a bottom of a first undulation and a main bearing point located near the end of the strap formed by a second undulation. These two bearing points are disposed on mutually opposite sides of the vertical part and at different distances from this vertical part, a radius of revolution of the intermediate bearing point being substantially smaller than a radius of revolution of the main bearing point.
Another aspect of the invention is a sole plate for a railroad tie equipped with straps according to the invention, the rods of which pass through holes provided in the pad and catch on countersinks into which the holes open, the sole plate having a receptacle intended for receiving the rail and, on each side of this receptacle, ramps the extension of which coincides with the flange of the rail, characterized in that the ramps have the form of a path in an arc of a circle, the mean radius of which is 2o equal to the radius of revolution of the main bearing point of the straps. The start of the ramp can correspond to the point of temporary fastening of the strap to the sole plate.
Furthermore, the fastening strap is advantageously equipped with a profiled piece made of synthetic - 9a -material, serving for plugging that part of the hole used for the passage of the eccentric catching heel of the strap and for guiding its vertical rectilinear part during its rotation.
An exemplary embodiment of the strap and examples of the use of this strap will now be described, with reference to the accompanying drawings:
Figure 1 is a first elevation view of the fastening strap.
Figure 2 is a plan view of this same fastening strap.
Figure 3 is a side view of this strap in the direction A
of Figure 1, that is to say in a position rotated through 90° in relation to Figure 1.
Figure 4 is an elevation view of a metal sole plate equipped with a fastening strap according to the inven tion.
Figure 5 is a plan view of this same metal sole plate.
Figure 6 is a partial sectional view of a concrete tie equipped with a fastening strap according to the inven-tion, according to a first embodiment.
Figure 7 is a partial plan view of this same concrete tie.
Figure 8 is a perspective view of the anchoring socket embedded in the concrete.
Figure 9 shows a complete tie with the rails fastened.
Figure 10 is a partial view of Figure 3, showing the strap equipped with an auxiliary closing and guiding piece.
_ 5 _ Figure 11 is a top view of this same strap part.
Figure 12 is a view in vertical section of the auxiliary piece shown in Figures 10 and 11.
Figure 13 is a partial view, in section according to XIII-XIII of Figure 15, of a concrete stringer equipped with a fastening strap and with a rail, according to a second embodiment.
Figure 14 is a side view in section according to XIV-XIV
of Figure 15.
Figure 15 is a plan view of the stringer of Figure 13.
Figure 16 is an exploded view of the metal support equipping the stringer of Figures 13 to 15 and of the abutment.
Figure 17 shows the same stringer equipped with an abutment of a different form.
The strap illustrated in Figures 1 to 3 is composed of a steel rod of circular cross-section, having a vertical rectilinear part 1 equipped, at its base, with a heel 2 directed perpendicularly relative to the axis 3 of this rectilinear part. The steel rod has a form both undulated vertically and wound about the axis 3 of the vertical part. The undulated part is composed of a short rising part 4, rectilinear as seen in horizontal projection {Figure 2), followed by a falling part 5 extending over a little more than a semicircle, as seen in horizontal projection, a first low point 6 constituting an intermediate bearing point and followed by a rising part 7, first rectilinear, as seen in horizontal projection, and then rounded, at the same time passing via a high point, to fall again in a longer undulation 8 of low curvature, terminating at the bottom of the undulation in a bent part 9 parallel to the part 7, as seen in ' CA 02004173 1999-04-O1 horizontal projection, and constituting a main bearing point 10. The bearing points 6 and 10 have flats intended for reducing the wear of both the strap at its bearing points and the parts on which it bears: The bearing points 6 andl0, as seen in plan view, that is to say in the direction of the axis 3 (Figure 2), are mutually opposite diametrically in relation to the middle 11 of the catching heel 2. In this same view, the axis 3 of the rectilinear part is located substantially at the center of the triangle formed by the parts 7 and 8 of the rod and by the straight line connecting the bearing points 6 and 10. It will be seen later that this arrangement directs the forces in a suitable way and ensures that the strap has a high stability. The vertical rectilinear part 1 can be of greater or lesser length, depending on the type of tie on which it is to be used. It will be seen that the main bearing point 10 and the intermediate bearing point 6 are not at the same level, the bearing point 10 being approximately 1 cm lower than the bearing point 6.
The use of the fastening strap illustrated in Figures 1 to 3 for the fastening of a rail by means of a metal sole plate will now be described with reference to Figures 4 and 5.
These figures show a metal sole plate 12 having a recess 13 intended for receiving a rail 14, with an elastic pad 15 made of rubber and two lateral abutments 16 and 17 made of plastic being interposed. The lower face 18 of the metal sole plate 12 is inclined slightly, since it is intended to be fastened to a concrete tie having an inclined plane. For this purpose, the metal sole plate 12 has two oblong holes 18 and 19 intended for receiving tie screws which are preferably screwed into PLASTIRAIL
(registered trade mark) anchoring sockets embedded in the concrete. On each side of the recess 9, the sole plate 12 has two plane bearing surfaces 20 and 21 intended for receiving the fastening straps. Only the bearing surface _ 7 _ 20 need be described in detail, the bearing surface 21 being identical to the bearing surface 20, but arranged upside down in relation to the rail. The bearing surface 20 is plane and horizontal. It has a part of circular contour 22 and a rectilinear part 23 extending along the recess 13. Round the plane part 20 there extends, over a quarter circle, a ramp 24 in the form of a path rising progressively in the direction of the rail 1~. The top of this ramp 20 is level with the edge of the flange 25 of the rail. The middle of the plane part 20 is pierced with a hole 26, the form of which matches the forrn of the profile of the rectilinear part 1 of the strap and of the heel 2, as seen in the plan view of Figure 2, there being the play necessary for the free insertion of the rec-tilinear part 1 of the strap into this hole 26. The hole 26 opens into a countersink 27 made in the lower face of the sole plate 12.
The fastening strap is installed in the position repre-sented by dot-and-dash lines, that is to say in a posi-Lion rotated through 180° about the axis 3 in relation to the posi~ion represented by unbroken lines. In this position, the catching heel 2 can be introduced freely into the hole 26. The main bearing point 10 is in a pasition 10' outside the ramp 24, and the catching heel 2 is very slightly below the countersink 27. As a result of a slight rotation of the strap, simultaneously the main bearing point 10 of the strap is brought onto the raattp 24 and the heel 2 of the strap is brought up against the countersink 27. As a result of an. additional slight rotation of the strap, the latter is given a slight tension sufficient to fasten the strap temporarily to the metal sole plate 12. This position is designated by 10".
The metal sole plate can thus be supplied equipped with the fastening straps, the straps being held sufficiently for transport and placing on the track. Once the metal sole plate is fastened to the tie and the rail 14 placed in its receptacle, each of the fastening straps is driven in rotation, in such a way that its main bearing point 30 - 8~
~~~.'~e~
moves along the ramp 24, the mean .radius of which is equal to the radius of revolution of the bearing point 10 about the axis 3. As regards the intermediate bearing point 6, this moves on the horizontal plane surface 20.
The bearing point 10 finally comes to bear on the flange 25 of the rail, at the same time exerting a pressure of the order of 10 to 12 kN. Furthermore, the strap bears on the bearing surface 20 of the sole plate by means of its intermediate bearing point 6, thereby exerting a vertical pull on the catching heel 2 via the rectilinear part 1 of the strap. The countersink 27 extends approximately over a semicircle, in such a way that the heel comes ug against the end of this countersink, thus limiting the rotation of the fastening strap. It is possible to provide a notch in the countersink 27, so that the catching heel 22 is locked in this countersink, thereby preventing the removal of the strap, once the rail has been fastened. In the right-hand portion of Figure 5, some parts corresponding to the left-hand portion have been designated by the same references accompanied by the sign The arc of rotation of the strap between the installation position and the rail-fastening position need not necess-arily be 180°, but can be less than or more than 180°.
The use of a fastening strap according to the invention for fastening a rail to a concrete tie 28 without a metal sole plate will now be described by means of Figures 6 and ?. This concrete tie can be made completely of concrete or be composed of two concrete blocks connected by means of a metal rod, as illustrated in Figure 9.
Figures 6 and ? show only part of the tie, that is to say the part corresponding to a rail. For each of the rails, the tie 28 has a recess 29 intended for receiving the rail. nn each side of this recess 29, the tie 28 has two ramps 30 and 31 descending avaay from the recess 29. On each side of the recess 29, the tie 28 also possesses two rectangular receptacles 32 and 33, the bottom of which is g ~~)'~~' ,at the Same level as the bottom of the recess 29 and which communicate with this recess. Two profiled sockets 34 made of synthetic material and surrounded by metal are embedded in the concrete. These sockets have the same composition and the same external form as the PIaASTIRATL
(registered trade mark) sockets serving for the fastening of the tie screws and described in the French Patent Application No. 88.12,185. These sockets 34, at their base, have a widening 35 forming a countersink 3b intended for performing the same function as the counter-sink 27 of the metal sole plate. The socket 34 is shown in perspective in Figure 8. Above the widening 35, the socket has a profile 37 matching the profile of the catching heel 2 of the fastening strap. In this 35 embodiment, the fastening strap has a rectilinear part 1 substantially longer than the strap illustrated in Figures 1 to 3, so as to be capable of catching at the bottom of the socket 34. Of course, the sockets 34 open out into the.bottom of the receptacles 32 and 33. The fastening strap is mounted together with an abutment 38, made of synthetic material, inserted between the curved Bart of the strap and the concrete. This abutment 38 has the form of a rectangular parallelepiped extended later-ally by a bearing surface 39 which is in the form of an arc of a circle and which extends the plane upper face of the abutment and engages on the bottom of the receptacle 32 in a stepped manner. The general form of the abutment 38 corresponds to the form of the receptacle 32 in which this abutment is seated. The abutment 38 has a profiled hole 40 allowing the passage of the catching heel 2 of the strap. The perimeter of the abutment 38 as contained between the circle of revolution of the intermediate bearing point 6 and the circle of revolution of the main bearing point 10, ~.~r such a way that this main bearing point ZO is always~utside th~ abutment.
The fastening strap equipped with its abutanent 38 is first introduced into the socket 34 in the position represented by dot-and-dash lines 6', 10', that is to say -1:0-,in a position rotated through 180° in relation to the position represented by unbroken lines. In this position, the main bearing point 10' is 1 or 2 mm from the surface of the concrete on the ramp 30. As a result of a slight rotation of the strap in the clockwise direction, the heel 2 of the strap enrages under the countersink 36. As a result of an additional slight rotation, the main bearing point 10' rises slightly on the ramp 30, the effect of which is to exert some tension on the strap, this tension ensuring the temporary fastening of the strap to the concrete tie. This temporary fastening position is, for example, the position 10". The tie can therefore be equipped with the fastening straps at the factory. To fasten the rail 14, it is sufficient to continue rotating the strap. During this rotation, the main bearing point 10 rises progressively on the ramp 30 of the concrete, the end of which is level with the flange 25 of the rail. The main bearing point 10 comes to bear under tension on the flange 25 with a pressure of the order of 10 to 12 kN. The rotation of the abutment is limited by the form of the widening 35 of the socket 34 which forms a stop limiting 'the rotation of the catching heel 2. During the rotation of the strap, the inter-mediate bearing point 6 slides on the horizontal surface of the abutment 3s, at the same time keeping the rec-tilinear Bart 1 of the strap in a vertical position. The strap exerts no lateral pres$ure on the hole 40 in the abutment 3s. In the final position, the intermediate bearing point 6 grips the bearing surface 39 of the abutment against the corxcrete. The compression of the concr~te in this zone is expedient because the concrete can thus better withstand the transverse forcss attribut-able to the lateral pressure exerted by the rail via the abutment 3s.
The socket 34 can, of course, also be provided with a locking notch for the heel 2 of the strap, if it is desirable that the latter be unremnovable.
.. 11 _ ~~~~~a~
The complete tie ~8 is illustrated in Figure 9. A com-posite concrete/steel tie has been represented by dot-and-dash lines. The tie is equipped with four straps 1.
It is supplied equipped with these straps, the temporary fastening of which is sufficient to keep the assembly in place during transport and putting on the track.
The hole 26 in the metal sale plate and the hale 40 in the abutment 3~ allows sand and dirt to penetrate.
Figures 10 to 12 show a means of plugging this hale, whilst at the same time ensuring a better guidance of the vertical part 1 of the strap during its rotation. Figures 10 and 11 illustrate a part of the strap shown in Figures 1 to 3. Fastened to the vertical part 1 between the heel 2 and the first curved part 4 of the strap is a plastic plug 41 which fills the vertical space between the heel 2 and the part 4 and the profile of which fills the profile of the hole 26. This plug 41 is equipped with two curved arms 42 and 43, by means of which the plug 41 is fastened by gripping to the cylindrical part 1 of the strap. The plug 4~. is preferably slightly larger than the hale 26 and hollava, as shovrn by the cross-section il-lus~trated in Figure 12, so as to have a transverse elasticity in order to plug the hale 26 more effectively.
xn Figure 10, dot-and-dash lines also represent the level of the surface 20 of the metal sole plate. When the strap is being intraduced inter the hole 26, the plug 41 is engaged into this hole 26 together with the rectilinear part of the strap, the assembly as a whale accupying the entire cross-section of the hole 26. During the rotation of the strap, the plug 41 remains in place, serving as a . guide for the part 1 of the strap. Figure 11 shows the strap after sorate rotation of the latter in relation to the p7.ug 41 retained xn the hole 26.
The strap illustrated in Figures 6 and 7 and in Figures 13 to 17 can, of course, be equipped with a plug similar to the plug 41 and differing from this only in its length.
_ 12_ The form of the undulations of the strap and the form of its heel and of the holes for the passage of this heel can, of course, differ from the forms shown.
The abutment 38 could be larger and have a ramp similar to the ramp 24 for the main bearing point 10 of the strap.
The rails are sometimes laid on stringers or ties roads of prestressed concrete. The manufacture of stringers or ties made of prestressed concrete does not allow the presence of recesses, such as the recesses provided in the ties illustrated in Figures 6 and 7. In this case, it is expedient to resort to another solution for fastening the abutments made of synthetic material. Figures 13 to 16 illustrate such a solution. Anchored in the prestres-sed-concrete stringer or tie 50, the surface of which is smooth, are metal supports 51 in the form of a bow of rectangular profile, the lower ends of which are bent to ensure an anchorage in the concrete. An abutment 52 made of synthetic material is mounted on each of the bows 51.
In parallel with the profile of the bow 51, this abutment 52 likewise has a bow-shaped profile, as shown in Figure 16. More specifically, the abutment has a plane upper face 53, a relatively thick side 54 serving as a center-ing abutment for the rail 14, and two thinner lateral sides 55 to 56 serving for retaining the abutment on the bow 51, the side 56 being equipped with a heel 57, the upper face of which is in the form of a ramp 58 rising towards the part 54. A horizontal wall 59 starting from the part 54 extends between the walls 55 anal 56. The distance between the wall 59 and the part 53 of the abutment corresponds to the thickness of the bar forming the bow 51. The stop 52 is slipped laterally onto the bow 51 in the direction of the arrow of Figure 16, the bow engaging between the part 53 and the wall 59 and between the walls 55 and 56. The abutment 52 is provided with a profiled hole 60 coinciding with a hole 61 of the same profile in the bow 51, for the passag$ of the strap. The _ 13 _ v~~~~~~.~'~
upper portion of the part 54 of the abutment has~a chamfer 62. When the abutment 52 is mounted on its support 51, the sides 55 and 56 and the heel 57 are in cantact with the stringer 50. mhe abutment 52 is first equipped with a strap identical to the straps of the preceding figures. As before, the main bearing point 10 of the strap is brought onto the start of the ramp 58 in order to fasten the strap temporarily. After the rail 14 has been installed between these abutments, this being made easier by the chamfers 62, the strap is driven in rotation in such a way that the main bearing point 10 rises on the ramp 58 to the height of the flange and the rail 14. As in the preceding embodiments, the perimeter of the upper face 53 of the abutment is contained between the circle of revolution of the intermediate bearing point 6 and the circle of revolution of the main bearing point 10.
By providing abutments having different thicknesses in the region of the part 54, it is possible, if the ap-propriate thickness is selected, to wedge the rail perfectly in the lateral direction.
Moreover, the thin wall 5~ leas the effect of insulating the strap electrically from the metal support 51.
The abutment described above need not necessarily be mounted upon its metal support 51 before the laying of the rail. Figure 17 illustrates an alternative embodiment allowing the insulating abutment to be fastened after the laying of the rail. Since the abutment is a wearing part, its replacement can thus be carried out without moving the rail. The abutment 63 differs from the abutment 52 in that the wall 59 is replaced by a ra.m 64 parallel to the part 54° corresponding to the part 54, this rim 64 terminating in a hookashaped eactra thickness 65 having a chamfer 66. The wall 64 is not connected to the side walls corresponding to the walls 55 and 56 of Figure 16.
The abutment 63 is installed vertically on the metal 1 ' support 51, a simple pressure on the abutment moving apart elastically the Tall 6~ which is fastened to the support 51 by snapping.
The abutment 63 is advantageously equipped with a flex-ible tongue 66 extending laterally from the part 54'. d3s emerges from the drawing, this tongue 66 is intended to rest on the flange of the rail 14. Tt is attached to the abutment somewhat high up, in such a way that it can follow the flange of the rail in its descending movement when it is being fastened by means of the strap. The tongue 66 is finally gripped between the flange of the rail and the main bearing point 10 of the strap. The tongue 66 protects the flange of the rail against a punching effect as a result of the friction of the strap and insulates the metal strap electrically from the rail.
The part 54' of the abutment possesses, in its lower part, a chamfer 67 intended to make it easier to intro-duce this part 54' between the support 51 and the flange of the rail.
Tn a simplified embodiment, the support 51 and the abutment 52 could be produced in one piece from a ductile material, such as cast .iron, graphite cast iron, alloy or composite material. The abutment so obtained takes the form of a piece anchored in the concrete and leaving a bowpshaped part located above the concrete and intended for the fastening of a strap, such as the strap desc-ribed.
Claims (17)
1. A fastening strap for the quick fastening of a railroad rail to ties made of material selected from the group consisting of concrete, wood, plastic or metal, the strap being composed of a material selected from the group consisting of steel or reinforced plastic, the strap being a rod having a vertical rectilinear part terminating in an eccentric heel intended for interacting with a catching means associated with the tie, and a curved part which forms a spring and the end of which is intended to press onto a flange of the rail after rotation of the strap about its vertical part to an installed position, during which rotation the said end moves on a ramp intended for tensioning that part of the strap forming a spring and for leading it onto the flange of the rail, wherein the curved part of the strap has a shape both undulated vertically and wound about the vertical part of the rod so as to form an intermediate bearing point formed by a bottom of a first undulation and a main bearing point located near the end of the strap formed by a second undulation, these two bearing points being disposed on mutually opposite sides of the vertical part and at different distances from this vertical part, a radius of revolution of the intermediate bearing point being substantially smaller than a radius of revolution of the main bearing point.
2. The fastening strap according to claim 1, in which, as seen in the direction of the axis of said vertical rectilinear part, said intermediate and main bearing points are disposed on mutually opposite sides of a vertical plane bisecting the eccentric heel.
3. The fastening strap according to claim 1 or 2, in which the strap is equipped with a profiled piece made of synthetic material and equipped with two curved arms by means of which it is fastened by gripping to the vertical rectilinear part of the strap above said eccentric heel, the profile of the profiled piece coinciding with the profile of the strap at the height of the eccentric heel.
4. The fastening strap according to claim 1, 2 or 3, in which the main bearing point has a flat forming a bearing surface.
5. The fastening strap according to any one of claims 1 to 4, further comprising a centering abutment having a hole through which the vertical rectilinear part of the strap passes, the perimeter of the upper face of the abutment being contained between circle of revolution of an intermediate bearing point and a circle of revolution of the main bearing point.
6. The fastening strap according to claim 5, in which lower and upper faces of the abutment are mutually parallel.
7. The fastening strap according to claim 6, in which said abutment possesses on one side a bearing surface intended to be gripped between the intermediate bearing point of the strap and the tie.
8. The fastening strap according to claim 6 or 7, in which the abutment is made of synthetic material.
9. The fastening strap according to claim 3, further comprising an abutment made of insulating material fastened to an intermediate support extending upwardly from the tie.
10. The fastening strap according to claim 9, in which the intermediate support is in the form of an inverted U-shaped bow of rectangular profile.
11. The fastening strap according to claim 10, in which said abutment has a general rectangular form and has a profile such that the abutment is engageable laterally onto the support.
12. The fastening strap according to claim 10, in which said abutment has a profile allowing it to be fastened to the support by vertical snapping.
13. The fastening strap according to claim 12, in which the abutment is equipped with a lateral tongue intended to be gripped between the rail and the main bearing point of the strap.
14. The fastening strap according to claim 6, 7 or 8, in which the tie has for each rail a recess intended for receiving the rail and two receptacles which are laterally adjacent to this recess and in which abutments can be seated, the tie having a ramp extending at least between that edge of said receptacles opposite the recess intended for the rail and an edge of this recess, these ramps forming ramps intended for tensioning the straps, and means embedded in the tie for retention of the straps.
15. The fastening strap according to claim 14, in which the means for retention of the straps are composed of sockets made of synthetic material and having a profile for anchoring in the tie.
16. The fastening strap according to any one of claims 1 to 4, wherein the vertical rectilinear part passes through a hole provided in a metal sole plate and catches on a countersink into which said hole opens, the sole plate having a receptacle intended for receiving the rail and, on each side of this receptacle, ramps the extension of which coincides with the flange of the rail, said ramps have the form of a path in an arc of a circle, the mean radius of which is equal to the radius of revolution of the main bearing point of the straps.
17. The fastening strap according to claim 16, in which a surface on the inside of the ramp in the form of an arc of a circle is plane and horizontal in the region of an upper end of the ramp.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8815851A FR2639971B1 (en) | 1988-12-02 | 1988-12-02 | FLANGE FOR QUICK FIXING OF A RAILWAY RAIL AND CROSS-SECTION PROVIDED WITH SUCH A FLANGE |
| FR8815851 | 1988-12-02 | ||
| EP89810764.4 | 1989-10-10 | ||
| EP89810764A EP0373099B1 (en) | 1988-12-02 | 1989-10-10 | Rapid rail-fastening device and sleeper provided with such a device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2004173A1 CA2004173A1 (en) | 1990-06-02 |
| CA2004173C true CA2004173C (en) | 2000-02-08 |
Family
ID=26123817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002004173A Expired - Fee Related CA2004173C (en) | 1988-12-02 | 1989-11-29 | Strap for the quick fastening of a railroad rail |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JP2704012B2 (en) |
| CN (1) | CN1020772C (en) |
| AT (1) | ATE84090T1 (en) |
| AU (1) | AU622245B2 (en) |
| BR (1) | BR8906290A (en) |
| CA (1) | CA2004173C (en) |
| DD (1) | DD300552A5 (en) |
| HU (1) | HU212894B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4856449B2 (en) * | 2006-03-06 | 2012-01-18 | 京浜急行電鉄株式会社 | Tie plate wear prevention rail fastening device |
| KR101050490B1 (en) * | 2010-09-20 | 2011-07-20 | 삼표이앤씨 주식회사 | Elastic clip for railroad rail fixing and this establishment method |
| TWI512167B (en) * | 2012-05-15 | 2015-12-11 | China Steel Corp | The railroad track of rubber tracks |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2911825A1 (en) * | 1979-03-26 | 1980-10-02 | Hoesch Werke Ag | SPRING RAIL MOUNT |
-
1989
- 1989-10-10 AT AT89810764T patent/ATE84090T1/en active
- 1989-11-29 CA CA002004173A patent/CA2004173C/en not_active Expired - Fee Related
- 1989-11-30 JP JP1312227A patent/JP2704012B2/en not_active Expired - Lifetime
- 1989-11-30 AU AU45769/89A patent/AU622245B2/en not_active Ceased
- 1989-12-01 DD DD335137A patent/DD300552A5/en unknown
- 1989-12-01 BR BR898906290A patent/BR8906290A/en not_active IP Right Cessation
- 1989-12-01 HU HU896345A patent/HU212894B/en not_active IP Right Cessation
- 1989-12-02 CN CN89108957A patent/CN1020772C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DD300552A5 (en) | 1992-06-17 |
| HU212894B (en) | 1996-12-30 |
| CN1044140A (en) | 1990-07-25 |
| JPH02200901A (en) | 1990-08-09 |
| CA2004173A1 (en) | 1990-06-02 |
| ATE84090T1 (en) | 1993-01-15 |
| CN1020772C (en) | 1993-05-19 |
| HU896345D0 (en) | 1990-02-28 |
| AU622245B2 (en) | 1992-04-02 |
| BR8906290A (en) | 1990-08-21 |
| AU4576989A (en) | 1990-06-07 |
| JP2704012B2 (en) | 1998-01-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |