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

Definitions

• the present invention relates to a device for fixing a railway rail to a concrete or metal support.
• the pre-assembled character means that the fixing was put in place as of the manufacture of the support or cross-member, and that it is in a position such that it will be possible on the site to bring, deposit and position the rail without dismantling or moving a any element.
• Patent Y0SSL0H DE 3243 895 describes a device of this type which however has a certain number of drawbacks in particular as regards the spring of this fixing which is made of a steel wire in the form of an open loop tightened by a puller -bottom, which requires, in the pre-assembled position, to sufficiently tighten the lag screw to hold the spring in place otherwise, when handling the cross member, the spring may come off.
• This tightening which is not always correct complicates the mechanization of the installation. Indeed, once the rail is in place, you have to unscrew the lag screw to pivot the fastener by 180 °, then tighten it and unscrewing the lag screw cannot be done by hand because the initial tightening has was intentionally strong enough to hold the spring.
• the attachment spring presses once pivoted in the clamping position, directly on the rail pad.
• the contact pressure of the spring metal on the metal of the rail is therefore very high and often causes a notching of the rail pad by the spring, in particular if very elastic soles are used under the rail.
• a spring blade pivotally mounted on the support by means of a clamping member passing through the blade through an opening, between a transport position also allowing the installation of the rail and a working position ensuring the support against the rail and
• said blade blocking means comprise:
• At least two housings formed on the upper face of the interlayer respectively on either side of the clamping member and intended to receive respectively in the pre-assembly position and in the working position a corresponding boss of the blade, and
• a lug made on the upper face of the interlayer and intended to be inserted into the opening of the blade when the latter is in the working position; the largest dimension of said opening being greater than the diameter of the Tightening.
• said means for wedging the blade comprise an insulating stopper mounted on the underside of the blade at its outer edge; said stop being intended to come respectively in the pre-assembly position or in the working position of the blade, either in contact with the support and the outer edge of the interlayer, or in contact with the rail and the inner edge of the interlayer.
• said spacer comprises at its outer part an anchoring element intended to be inserted in a corresponding housing of the support.
• the device of the invention makes it possible both to distribute the clamping pressure, to electrically isolate the blade from the rail and to retain the blade in transverse position relative to the rail, the end of the blade opposite to that equipped with the insulating stop being, for its part, always in abutment on one or the other of the ends of the insulating interlayer.
• the leaf spring is inseparable from the support.
• the leaf spring in the tight position is mechanically and electrically isolated from the rail and the rear support reaction of the blade takes place further from the rail than the transverse support on the concrete. Finally, the anchoring of the binding benefiting from the present invention does not need to be electrically isolated from the support cross member, which makes this device very economical.
• the cooperation of the blade blocking means with the wedging means of said blade allows the device to be pre-assembled on the support without hindering the subsequent installation of the rail, then the pivoting and the support of the blade against the rail in place.
• This combination of means also avoids all displacement and any untimely rotation of any of the elements of the device despite the movements of the rail when the trains pass.
• Figure 1 shows a side view of the fixing device of the invention in premo ⁇ tée position.
• Figure 2 shows a top view of the device of Figure 1.
• Figure 3 shows a side view of the fixing device in the clamped position on the rail.
• FIG. 4 represents a top view of the device of FIG. 3.
• FIG. 5 represents a sectional view along AA of the device of FIG. 4.
• Figure 6 shows a side view of the leaf spring before tightening.
• Figure 7 shows a side view of the leaf spring after tightening.
• Figure 8 shows a top view of the leaf spring before or after tightening.
• Figures 9 and 10 are top and side views of the insulating interlayer.
• the device of the invention as shown in Figures 1 to 4 comprises a leaf spring 5 pivotally mounted on the support by means of a clamping member 6 passing through the blade 5 through an opening 53, between a transport position also allowing the installation of the rail and a working position ensuring support against the rail and an insulating interlayer 3 disposed between the support 1 and the blade 5.
• the device of the invention also comprises locking means and means for wedging the blade 5 in the transport position and in the working position.
• the locking means as shown in Figures 1 to 4 comprise two housings 32, 38 formed on the upper face of the interlayer respectively on either side of the clamping member 6 and intended to receive respectively in the pre-assembly position and in the working position a corresponding boss 52 of the blade, and a lug formed on the upper face of the interlayer 3 and intended to be inserted into the opening of the blade when the latter is in the working position; said opening being made in the form of an oblong hole 53 extending perpendicular to the rail.
• interlayer 3 has more than two housings to reinforce the holding of the blade in its various positions.
• the wedging means as shown in Figures 1 to 4 comprise an insulating stop 4 mounted on the inner face of the blade at its outer edge 51; said stop being intended to come respectively in premo ⁇ tage position or in working position of the blade, either in contact with the support 1 and the outer edge 33 of the interlayer 3, or in contact with the rail and the inner edge 31 of the tab 3.
• Figure 1 shows the fixing device in the pre-assembled position when the rail has not yet been placed on its support.
• the clamping member 6 passes through the leaf spring
• the stop 4 is clipped onto the outer edge 51 of the leaf spring 5. It presses by its lower face 41 on the support 1 and abuts against the outer edge 33 of the interlayer 3. Thus, the spring blade 5 / stop 4 assembly cannot move towards the axis A of the support table.
• the rail is put in place, it is placed on the sole 2 between the faces 31 of the spacers 3 of the two fastening devices facing each other.
• the stop 4 made integral with the blade 5, is therefore movable with the latter in the pivoting between its pre-assembly and transport position and its working position.
• the face 31 of the interlayer 3 is closer to the axis A than any other part of the binding.
• the head 61 of the clamping member 6 can participate in guiding the rail during its descent and its installation on the sole 2, this if necessary to protect the edge 31 of the interlayer 3.
• the interlayer 3 possibly has an anchoring element such as a small stud 35 intended to be inserted in a corresponding housing 12 of the cross member 1 to properly hold it in place.
• FIG. 1 is a top view of Figure 1 with the trace 71 of the edge of the rail pad.
• the trace 71 is very close to the inner edge 31 of the interlayer 3.
• the distance between the trace 71 and the inner edge 31 is variable during installation. In general, it is between 0 and 3.5 mm to accept the rolling tolerances of the rail shoe.
• the leaf spring 5 has a substantially trapezoidal shape when viewed from above.
• the stop 4 once clipped to the outer edge 51 of the blade 5, can no longer separate away from the interlayer 3 and this thanks to the angle Q between the outer edge 51 and the lateral edge of the blade which is less than 90 °.
• the stop 4 can also not approach the interlayer 3 because it is in contact with support against the outer edge of said interlayer 3 and there should be a clearance of at least 3 or 4 mm between the bottom of the head 61 of the clamping member 6 and the top of the blade 5 so that the stop 4 can lift and escape the outer edge 33 of the interlayer 3.
• the stop 4 is glued or molded to the end 51 of the blade 5.
• FIG. 3 represents a side view of the fastening in the clamped mounted position on the rail 7.
• the operations are as follows: rail 7 on its sole 2 and between the inner edges 31 of each of the spacers 3 specific to each attachment,
• the blade 5 being a spring, its curve changes during this operation.
• the end of the blade 5 rests by the boss 52 in the bowl housing 38 arranged on the upper face of the interlayer 3 behind the clamping member 6 at level of outer edge 33.
• the distance between any one of the ends of the edge 51 of the blade 5 and the body 62 of the clamping member 6 is less than the distance between this same body 62 and the web of the rail. 7. This condition is necessary to allow the blade 5 to rotate 180 ° when it is placed on the rail by pivoting.
• the clearance J between the bottom of the blade 5 and the top of the interlayer 3 will be between 0 and 4 mm.
• the choice of this clearance J is a function of the elasticity in compression of the sole 2 and the method of tightening the lag screw 6.
• the clearance J varies because the elastic blade 5 tends to follow the movement of the rail.
• the lateral forces communicated by the rail cause the edge 71 of the pad to press against the inner edge 31 of the interlayer 3 which retransmits these forces on the shoulder 11 of the support 1 by its internal face 37.
• the vertical reaction of support of the rear edge 52 of the blade 5 compresses the support 1 and therefore reduces the harmful effects of the lateral thrust of the face 37 of the interlayer 3 on the shoulder 11, lateral thrust which is thus located between the rail and rear vertical support of the leaf spring.
• the rail 7 is only in contact with elastic and insulating parts, the sole 2, the stop 4 and the interlayer 3.
• interlayer 3 and the stopper 4 must both be insulating, they are not mechanically stressed in the same way and it is preferable to take this into account in the choice of materials.
• midsole 3 and sole 2 in one piece.
• Figure 4 is a top view of Figure 3.
• a lug 34 is formed on the upper face of the interlayer 3 and is inserted into the opening in the form of oblong hole 53 of the blade when the latter is in the working position.
• FIG. 5 represents the principle of clipping the stop 4 onto the blade 5 by means of the elastic lugs 41,42,43,44. This arrangement is not, however, limiting and, as already indicated above, the stop 4 can be adhered to or molded onto the edge 51 of the blade 5.
• Figures 6, 7 and 8 show the spring blade 5 with its central flat part, its outer edge 51 and its boss 52.
• Figure 7 shows the new curve of the blade 5 after tightening.
• the general shape of the blade 5 is not limiting, but the present invention requires a trapezoidal blade of flat steel provided with a hole which is sufficiently oblong to be able to be placed sufficiently offset in the premo ⁇ tée position, so as not to hinder the setting in rail place.
• a rectangular blade would however also be possible if the stop 4 is adhered to or overmolded on said blade (the angle o of the blade 5 is no longer a retaining element of the stop 4 on the edge 51 of the blade 5) .
• Figures 9 and 10 show the insert 3.
• This insert 3 is optionally provided with an anchoring element such as a stud 35.
• the housing 32 is intended to receive the boss 52 of the blade 5 in the pre-assembled position while the housing 38 will receive the boss 52 of the blade 5 in the working position (pressing against the rail).
• the hole 36 here shown round, will allow the rod 62 of the clamping member to pass through. This hole 36 may also be oblong or even open out onto the internal edge 31 to facilitate the positioning of the interlayer 3 during manufacture. of the support 1. Generally there is a clearance between the rod 61 and the hole 36 so that in the presence of lateral forces, the rod 61 does not undergo any bending force.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Railway Tracks (AREA)
• Clamps And Clips (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9393242

Family Applications (1)

Country Status (10)

Families Citing this family (8)

Family Cites Families (3)

• 1990
  • 1990-01-30 FR FR9001086A patent/FR2657631B1/fr not_active Expired - Lifetime
• 1991
  • 1991-01-29 PT PT96596A patent/PT96596A/pt not_active Application Discontinuation
  • 1991-01-29 MA MA22325A patent/MA22052A1/fr unknown
  • 1991-01-29 IE IE030091A patent/IE910300A1/en unknown
  • 1991-01-29 JP JP91503768A patent/JPH05508202A/ja active Pending
  • 1991-01-29 WO PCT/FR1991/000049 patent/WO1991011556A1/fr active IP Right Grant
  • 1991-01-29 EP EP91903328A patent/EP0513105B1/de not_active Expired - Lifetime
  • 1991-01-30 TN TNTNSN91005A patent/TNSN91005A1/fr unknown
  • 1991-01-30 OA OA59942A patent/OA09341A/xx unknown
  • 1991-01-30 CS CS91214A patent/CS21491A2/cs unknown

Non-Patent Citations (1)

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